From 2caad4f7b024cced797a4c3bdffaec470976f0a8 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 4 Mar 2024 10:10:06 +0100
Subject: drm/bridge: imx8mp-hdmi-tx: Convert to platform remove callback
 returning void
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240304091005.717012-2-u.kleine-koenig@pengutronix.de
---
 drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
index 89fc432ac611..13bc570c5473 100644
--- a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
+++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-tx.c
@@ -104,13 +104,11 @@ static int imx8mp_dw_hdmi_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int imx8mp_dw_hdmi_remove(struct platform_device *pdev)
+static void imx8mp_dw_hdmi_remove(struct platform_device *pdev)
 {
 	struct imx8mp_hdmi *hdmi = platform_get_drvdata(pdev);
 
 	dw_hdmi_remove(hdmi->dw_hdmi);
-
-	return 0;
 }
 
 static int __maybe_unused imx8mp_dw_hdmi_pm_suspend(struct device *dev)
@@ -140,7 +138,7 @@ MODULE_DEVICE_TABLE(of, imx8mp_dw_hdmi_of_table);
 
 static struct platform_driver imx8mp_dw_hdmi_platform_driver = {
 	.probe		= imx8mp_dw_hdmi_probe,
-	.remove		= imx8mp_dw_hdmi_remove,
+	.remove_new	= imx8mp_dw_hdmi_remove,
 	.driver		= {
 		.name	= "imx8mp-dw-hdmi-tx",
 		.of_match_table = imx8mp_dw_hdmi_of_table,
-- 
cgit 


From 9c8a10bf1f3467b2c16f6848249bdc7692ace825 Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@redhat.com>
Date: Thu, 4 Apr 2024 19:35:53 -0400
Subject: drm/nouveau/kms/nv50-: Disable AUX bus for disconnected DP ports

GSP has its own state for keeping track of whether or not a given display
connector is plugged in or not, and enforces this state on the driver. In
particular, AUX transactions on a DisplayPort connector which GSP says is
disconnected can never succeed - and can in some cases even cause
unexpected timeouts, which can trickle up to cause other problems. A good
example of this is runtime power management: where we can actually get
stuck trying to resume the GPU if a userspace application like fwupd tries
accessing a drm_aux_dev for a disconnected port. This was an issue I hit a
few times with my Slimbook Executive 16 - where trying to offload something
to the discrete GPU would wake it up, and then potentially cause it to
timeout as fwupd tried to immediately access the dp_aux_dev nodes for
nouveau.

Likewise: we don't really have any cases I know of where we'd want to
ignore this state and try an aux transaction anyway - and failing pointless
aux transactions immediately can even speed things up. So - let's start
enabling/disabling the aux bus in nouveau_dp_detect() to fix this. We
enable the aux bus during connector probing, and leave it enabled if we
discover something is actually on the connector. Otherwise, we just shut it
off.

This should fix some people's runtime PM issues (like myself), and also get
rid of quite of a lot of GSP error spam in dmesg.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404233736.7946-2-lyude@redhat.com
---
 drivers/gpu/drm/nouveau/nouveau_dp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 7de7707ec6a8..3f6ccce20ea0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -232,6 +232,9 @@ nouveau_dp_detect(struct nouveau_connector *nv_connector,
 	    dpcd[DP_DPCD_REV] != 0)
 		return NOUVEAU_DP_SST;
 
+	// Ensure that the aux bus is enabled for probing
+	drm_dp_dpcd_set_powered(&nv_connector->aux, true);
+
 	mutex_lock(&nv_encoder->dp.hpd_irq_lock);
 	if (mstm) {
 		/* If we're not ready to handle MST state changes yet, just
@@ -293,6 +296,13 @@ out:
 	if (mstm && !mstm->suspended && ret != NOUVEAU_DP_MST)
 		nv50_mstm_remove(mstm);
 
+	/* GSP doesn't like when we try to do aux transactions on a port it considers disconnected,
+	 * and since we don't really have a usecase for that anyway - just disable the aux bus here
+	 * if we've decided the connector is disconnected
+	 */
+	if (ret == NOUVEAU_DP_NONE)
+		drm_dp_dpcd_set_powered(&nv_connector->aux, false);
+
 	mutex_unlock(&nv_encoder->dp.hpd_irq_lock);
 	return ret;
 }
-- 
cgit 


From fe6660b661c3397af0867d5d098f5b26581f1290 Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@redhat.com>
Date: Thu, 4 Apr 2024 19:35:54 -0400
Subject: drm/nouveau/dp: Don't probe eDP ports twice harder

I didn't pay close enough attention the last time I tried to fix this
problem - while we currently do correctly take care to make sure we don't
probe a connected eDP port more then once, we don't do the same thing for
eDP ports we found to be disconnected.

So, fix this and make sure we only ever probe eDP ports once and then leave
them at that connector state forever (since without HPD, it's not going to
change on its own anyway). This should get rid of the last few GSP errors
getting spit out during runtime suspend and resume on some machines, as we
tried to reprobe eDP ports in response to ACPI hotplug probe events.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404233736.7946-3-lyude@redhat.com
---
 drivers/gpu/drm/nouveau/nouveau_dp.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 3f6ccce20ea0..a72c45809484 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -225,12 +225,15 @@ nouveau_dp_detect(struct nouveau_connector *nv_connector,
 	u8 *dpcd = nv_encoder->dp.dpcd;
 	int ret = NOUVEAU_DP_NONE, hpd;
 
-	/* If we've already read the DPCD on an eDP device, we don't need to
-	 * reread it as it won't change
+	/* eDP ports don't support hotplugging - so there's no point in probing eDP ports unless we
+	 * haven't probed them once before.
 	 */
-	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
-	    dpcd[DP_DPCD_REV] != 0)
-		return NOUVEAU_DP_SST;
+	if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
+		if (connector->status == connector_status_connected)
+			return NOUVEAU_DP_SST;
+		else if (connector->status == connector_status_disconnected)
+			return NOUVEAU_DP_NONE;
+	}
 
 	// Ensure that the aux bus is enabled for probing
 	drm_dp_dpcd_set_powered(&nv_connector->aux, true);
-- 
cgit 


From c0cd6925856f661e1a37278660ccae551cef7077 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Wed, 3 Apr 2024 12:31:28 +0200
Subject: drm/ast: Set DDC timeout in milliseconds

Compute the i2c timeout in jiffies from a value in milliseconds. The
original values of 2 jiffies equals 2 milliseconds if HZ has been
configured to a value of 1000. This corresponds to 2.2 milliseconds
used by most other DRM drivers. Update ast accordingly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 312fec1405dd ("drm: Initial KMS driver for AST (ASpeed Technologies) 2000 series (v2)")
Cc: Dave Airlie <airlied@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v3.5+
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240403103325.30457-2-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_ddc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/ast/ast_ddc.c b/drivers/gpu/drm/ast/ast_ddc.c
index b7718084422f..3e156a6b6831 100644
--- a/drivers/gpu/drm/ast/ast_ddc.c
+++ b/drivers/gpu/drm/ast/ast_ddc.c
@@ -153,7 +153,7 @@ struct ast_ddc *ast_ddc_create(struct ast_device *ast)
 
 	bit = &ddc->bit;
 	bit->udelay = 20;
-	bit->timeout = 2;
+	bit->timeout = usecs_to_jiffies(2200);
 	bit->data = ddc;
 	bit->setsda = ast_ddc_algo_bit_data_setsda;
 	bit->setscl = ast_ddc_algo_bit_data_setscl;
-- 
cgit 


From 7c885f8afa01235e91ca2c6dd635dcf3dcd2416f Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Wed, 3 Apr 2024 12:31:29 +0200
Subject: drm/ast: Group DDC init code by data structure

Reorder the code to set up the DDC channel by data structure, so
that each data structure's init is in a separate block: first the
bit algo then the i2c adapter. Makes the code more readable. No
functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240403103325.30457-3-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_ddc.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/ast/ast_ddc.c b/drivers/gpu/drm/ast/ast_ddc.c
index 3e156a6b6831..4df52aeba4f7 100644
--- a/drivers/gpu/drm/ast/ast_ddc.c
+++ b/drivers/gpu/drm/ast/ast_ddc.c
@@ -145,15 +145,7 @@ struct ast_ddc *ast_ddc_create(struct ast_device *ast)
 		return ERR_PTR(-ENOMEM);
 	ddc->ast = ast;
 
-	adapter = &ddc->adapter;
-	adapter->owner = THIS_MODULE;
-	adapter->dev.parent = dev->dev;
-	i2c_set_adapdata(adapter, ddc);
-	snprintf(adapter->name, sizeof(adapter->name), "AST DDC bus");
-
 	bit = &ddc->bit;
-	bit->udelay = 20;
-	bit->timeout = usecs_to_jiffies(2200);
 	bit->data = ddc;
 	bit->setsda = ast_ddc_algo_bit_data_setsda;
 	bit->setscl = ast_ddc_algo_bit_data_setscl;
@@ -161,8 +153,16 @@ struct ast_ddc *ast_ddc_create(struct ast_device *ast)
 	bit->getscl = ast_ddc_algo_bit_data_getscl;
 	bit->pre_xfer = ast_ddc_algo_bit_data_pre_xfer;
 	bit->post_xfer = ast_ddc_algo_bit_data_post_xfer;
+	bit->udelay = 20;
+	bit->timeout = usecs_to_jiffies(2200);
 
+	adapter = &ddc->adapter;
+	adapter->owner = THIS_MODULE;
 	adapter->algo_data = bit;
+	adapter->dev.parent = dev->dev;
+	snprintf(adapter->name, sizeof(adapter->name), "AST DDC bus");
+	i2c_set_adapdata(adapter, ddc);
+
 	ret = i2c_bit_add_bus(adapter);
 	if (ret) {
 		drm_err(dev, "Failed to register bit i2c\n");
-- 
cgit 


From a6020c4386a0fd1d510909cf84382504ab239fe2 Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Wed, 3 Apr 2024 12:31:30 +0200
Subject: drm/ast: Define struct ast_ddc in ast_ddc.c

Move the definition of struct ast_ddc to ast_ddc.c and return the i2c
adapter from ast_ddc_create(). Update callers accordingly. Avoids
including Linux i2c header files, except where required. No functional
changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240403103325.30457-4-tzimmermann@suse.de
---
 drivers/gpu/drm/ast/ast_ddc.c  | 14 ++++++++++++--
 drivers/gpu/drm/ast/ast_ddc.h  | 13 ++-----------
 drivers/gpu/drm/ast/ast_mode.c |  8 ++++----
 3 files changed, 18 insertions(+), 17 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/ast/ast_ddc.c b/drivers/gpu/drm/ast/ast_ddc.c
index 4df52aeba4f7..29cf5d157f34 100644
--- a/drivers/gpu/drm/ast/ast_ddc.c
+++ b/drivers/gpu/drm/ast/ast_ddc.c
@@ -21,12 +21,22 @@
  * of the Software.
  */
 
+#include <linux/i2c-algo-bit.h>
+#include <linux/i2c.h>
+
 #include <drm/drm_managed.h>
 #include <drm/drm_print.h>
 
 #include "ast_ddc.h"
 #include "ast_drv.h"
 
+struct ast_ddc {
+	struct ast_device *ast;
+
+	struct i2c_algo_bit_data bit;
+	struct i2c_adapter adapter;
+};
+
 static void ast_ddc_algo_bit_data_setsda(void *data, int state)
 {
 	struct ast_ddc *ddc = data;
@@ -132,7 +142,7 @@ static void ast_ddc_release(struct drm_device *dev, void *res)
 	i2c_del_adapter(&ddc->adapter);
 }
 
-struct ast_ddc *ast_ddc_create(struct ast_device *ast)
+struct i2c_adapter *ast_ddc_create(struct ast_device *ast)
 {
 	struct drm_device *dev = &ast->base;
 	struct ast_ddc *ddc;
@@ -173,5 +183,5 @@ struct ast_ddc *ast_ddc_create(struct ast_device *ast)
 	if (ret)
 		return ERR_PTR(ret);
 
-	return ddc;
+	return &ddc->adapter;
 }
diff --git a/drivers/gpu/drm/ast/ast_ddc.h b/drivers/gpu/drm/ast/ast_ddc.h
index 08f3994e09cc..85c93edc9ae1 100644
--- a/drivers/gpu/drm/ast/ast_ddc.h
+++ b/drivers/gpu/drm/ast/ast_ddc.h
@@ -3,18 +3,9 @@
 #ifndef __AST_DDC_H__
 #define __AST_DDC_H__
 
-#include <linux/i2c.h>
-#include <linux/i2c-algo-bit.h>
-
 struct ast_device;
+struct i2c_adapter;
 
-struct ast_ddc {
-	struct ast_device *ast;
-
-	struct i2c_adapter adapter;
-	struct i2c_algo_bit_data bit;
-};
-
-struct ast_ddc *ast_ddc_create(struct ast_device *ast);
+struct i2c_adapter *ast_ddc_create(struct ast_device *ast);
 
 #endif
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index bb9b66aba9ee..ae21d89b899c 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1360,7 +1360,7 @@ static const struct drm_connector_funcs ast_vga_connector_funcs = {
 static int ast_vga_connector_init(struct drm_device *dev, struct drm_connector *connector)
 {
 	struct ast_device *ast = to_ast_device(dev);
-	struct ast_ddc *ddc;
+	struct i2c_adapter *ddc;
 	int ret;
 
 	ddc = ast_ddc_create(ast);
@@ -1371,7 +1371,7 @@ static int ast_vga_connector_init(struct drm_device *dev, struct drm_connector *
 	}
 
 	ret = drm_connector_init_with_ddc(dev, connector, &ast_vga_connector_funcs,
-					  DRM_MODE_CONNECTOR_VGA, &ddc->adapter);
+					  DRM_MODE_CONNECTOR_VGA, ddc);
 	if (ret)
 		return ret;
 
@@ -1429,7 +1429,7 @@ static const struct drm_connector_funcs ast_sil164_connector_funcs = {
 static int ast_sil164_connector_init(struct drm_device *dev, struct drm_connector *connector)
 {
 	struct ast_device *ast = to_ast_device(dev);
-	struct ast_ddc *ddc;
+	struct i2c_adapter *ddc;
 	int ret;
 
 	ddc = ast_ddc_create(ast);
@@ -1440,7 +1440,7 @@ static int ast_sil164_connector_init(struct drm_device *dev, struct drm_connecto
 	}
 
 	ret = drm_connector_init_with_ddc(dev, connector, &ast_sil164_connector_funcs,
-					  DRM_MODE_CONNECTOR_DVII, &ddc->adapter);
+					  DRM_MODE_CONNECTOR_DVII, ddc);
 	if (ret)
 		return ret;
 
-- 
cgit 


From ba42ecb590d9b1dff19c3714d0de6ddcbcfd5d75 Mon Sep 17 00:00:00 2001
From: Jesse Zhang <jesse.zhang@amd.com>
Date: Mon, 1 Apr 2024 11:04:43 +0800
Subject: drm/ttm: remove unused paramter
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

remove the unsed the paramter in the function
ttm_bo_bounce_temp_buffer and ttm_bo_add_move_fence.
 V2:rebase the patch on top of drm-misc-next (Christian)

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240401030443.3384494-1-jesse.zhang@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index e059b1e1b13b..6396dece0db1 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -402,7 +402,6 @@ void ttm_bo_put(struct ttm_buffer_object *bo)
 EXPORT_SYMBOL(ttm_bo_put);
 
 static int ttm_bo_bounce_temp_buffer(struct ttm_buffer_object *bo,
-				     struct ttm_resource **mem,
 				     struct ttm_operation_ctx *ctx,
 				     struct ttm_place *hop)
 {
@@ -469,7 +468,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
 		if (ret != -EMULTIHOP)
 			break;
 
-		ret = ttm_bo_bounce_temp_buffer(bo, &evict_mem, ctx, &hop);
+		ret = ttm_bo_bounce_temp_buffer(bo, ctx, &hop);
 	} while (!ret);
 
 	if (ret) {
@@ -698,7 +697,6 @@ EXPORT_SYMBOL(ttm_bo_unpin);
  */
 static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 				 struct ttm_resource_manager *man,
-				 struct ttm_resource *mem,
 				 bool no_wait_gpu)
 {
 	struct dma_fence *fence;
@@ -787,7 +785,7 @@ static int ttm_bo_alloc_resource(struct ttm_buffer_object *bo,
 		if (ret)
 			continue;
 
-		ret = ttm_bo_add_move_fence(bo, man, *res, ctx->no_wait_gpu);
+		ret = ttm_bo_add_move_fence(bo, man, ctx->no_wait_gpu);
 		if (unlikely(ret)) {
 			ttm_resource_free(bo, res);
 			if (ret == -EBUSY)
@@ -894,7 +892,7 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
 bounce:
 		ret = ttm_bo_handle_move_mem(bo, res, false, ctx, &hop);
 		if (ret == -EMULTIHOP) {
-			ret = ttm_bo_bounce_temp_buffer(bo, &res, ctx, &hop);
+			ret = ttm_bo_bounce_temp_buffer(bo, ctx, &hop);
 			/* try and move to final place now. */
 			if (!ret)
 				goto bounce;
-- 
cgit 


From 9677547d836299497ba2da1ad59851e200109ca1 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 18 Mar 2024 22:44:07 +0200
Subject: drm: Introduce plane SIZE_HINTS property
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a new immutable plane property by which a plane can advertise
a handful of recommended plane sizes. This would be mostly exposed
by cursor planes as a slightly more capable replacement for
the DRM_CAP_CURSOR_WIDTH/HEIGHT caps, which can only declare
a one size fits all limit for the whole device.

Currently eg. amdgpu/i915/nouveau just advertize the max cursor
size via the cursor size caps. But always using the max sized
cursor can waste a surprising amount of power, so a better
strategy is desirable.

Most other drivers don't specify any cursor size at all, in
which case the ioctl code just claims that 64x64 is a great
choice. Whether that is actually true is debatable.

A poll of various compositor developers informs us that
blindly probing with setcursor/atomic ioctl to determine
suitable cursor sizes is not acceptable, thus the
introduction of the new property to supplant the cursor
size caps. The compositor will now be free to select a
more optimal cursor size from the short list of options.

Note that the reported sizes (either via the property or the
caps) make no claims about things such as plane scaling. So
these things should only really be consulted for simple
"cursor like" use cases.

Userspace consumer in the form of mutter seems ready:
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3165

v2: Try to add some docs
v3: Specify that value 0 is reserved for future use (basic idea from Jonas)
    Drop the note about typical hardware (Pekka)
v4: Update the docs to indicate the list is "in order of preference"
    Add a a link to the mutter MR
v5: Limit to cursors only for now (Simon)

Cc: Jonas Ådahl <jadahl@redhat.com>
Cc: Sameer Lattannavar <sameer.lattannavar@intel.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Acked-by: Daniel Stone <daniels@collabora.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240318204408.9687-2-ville.syrjala@linux.intel.com
---
 drivers/gpu/drm/drm_mode_config.c |  7 +++++
 drivers/gpu/drm/drm_plane.c       | 56 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 48fd2d67f352..568972258222 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -372,6 +372,13 @@ static int drm_mode_create_standard_properties(struct drm_device *dev)
 		return -ENOMEM;
 	dev->mode_config.modifiers_property = prop;
 
+	prop = drm_property_create(dev,
+				   DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
+				   "SIZE_HINTS", 0);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.size_hints_property = prop;
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 672c655c7a8e..eecc24c54efd 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -140,6 +140,25 @@
  *     DRM_FORMAT_MOD_LINEAR. Before linux kernel release v5.1 there have been
  *     various bugs in this area with inconsistencies between the capability
  *     flag and per-plane properties.
+ *
+ * SIZE_HINTS:
+ *     Blob property which contains the set of recommended plane size
+ *     which can used for simple "cursor like" use cases (eg. no scaling).
+ *     Using these hints frees userspace from extensive probing of
+ *     supported plane sizes through atomic/setcursor ioctls.
+ *
+ *     The blob contains an array of struct drm_plane_size_hint, in
+ *     order of preference. For optimal usage userspace should pick
+ *     the first size that satisfies its own requirements.
+ *
+ *     Drivers should only attach this property to planes that
+ *     support a very limited set of sizes.
+ *
+ *     Note that property value 0 (ie. no blob) is reserved for potential
+ *     future use. Current userspace is expected to ignore the property
+ *     if the value is 0, and fall back to some other means (eg.
+ *     &DRM_CAP_CURSOR_WIDTH and &DRM_CAP_CURSOR_HEIGHT) to determine
+ *     the appropriate plane size to use.
  */
 
 static unsigned int drm_num_planes(struct drm_device *dev)
@@ -1729,3 +1748,40 @@ int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
 	return 0;
 }
 EXPORT_SYMBOL(drm_plane_create_scaling_filter_property);
+
+/**
+ * drm_plane_add_size_hint_property - create a size hint property
+ *
+ * @plane: drm plane
+ * @hints: size hints
+ * @num_hints: number of size hints
+ *
+ * Create a size hints property for the plane.
+ *
+ * RETURNS:
+ * Zero for success or -errno
+ */
+int drm_plane_add_size_hints_property(struct drm_plane *plane,
+				      const struct drm_plane_size_hint *hints,
+				      int num_hints)
+{
+	struct drm_device *dev = plane->dev;
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_property_blob *blob;
+
+	/* extending to other plane types needs actual thought */
+	if (drm_WARN_ON(dev, plane->type != DRM_PLANE_TYPE_CURSOR))
+		return -EINVAL;
+
+	blob = drm_property_create_blob(dev,
+					array_size(sizeof(hints[0]), num_hints),
+					hints);
+	if (IS_ERR(blob))
+		return PTR_ERR(blob);
+
+	drm_object_attach_property(&plane->base, config->size_hints_property,
+				   blob->base.id);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_plane_add_size_hints_property);
-- 
cgit 


From 42118c5f6853a28c132ab1ae6efe3893b051e0d2 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 18 Mar 2024 22:44:08 +0200
Subject: drm/i915: Add SIZE_HINTS property for cursors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Advertize more suitable cursor sizes via the new SIZE_HINTS
plane property.

We can't really enumerate all supported cursor sizes on
the platforms where the cursor height can vary freely, so
for simplicity we'll just expose all square+POT sizes between
each platform's min and max cursor limits.

Depending on the platform this will give us one of three
results:
- 64x64,128x128,256x256,512x512
- 64x64,128x128,256x256
- 64x64

Cc: Simon Ser <contact@emersion.fr>
Cc: Jonas Ådahl <jadahl@redhat.com>
Cc: Daniel Stone <daniel@fooishbar.org>
Cc: Sameer Lattannavar <sameer.lattannavar@intel.com>
Cc: Sebastian Wick <sebastian.wick@redhat.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240318204408.9687-3-ville.syrjala@linux.intel.com
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
---
 drivers/gpu/drm/i915/display/intel_cursor.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/i915/display/intel_cursor.c b/drivers/gpu/drm/i915/display/intel_cursor.c
index 0d3da55e1c24..fc43ea0c3335 100644
--- a/drivers/gpu/drm/i915/display/intel_cursor.c
+++ b/drivers/gpu/drm/i915/display/intel_cursor.c
@@ -821,6 +821,28 @@ static const struct drm_plane_funcs intel_cursor_plane_funcs = {
 	.format_mod_supported = intel_cursor_format_mod_supported,
 };
 
+static void intel_cursor_add_size_hints_property(struct intel_plane *plane)
+{
+	struct drm_i915_private *i915 = to_i915(plane->base.dev);
+	const struct drm_mode_config *config = &i915->drm.mode_config;
+	struct drm_plane_size_hint hints[4];
+	int size, max_size, num_hints = 0;
+
+	max_size = min(config->cursor_width, config->cursor_height);
+
+	/* for simplicity only enumerate the supported square+POT sizes */
+	for (size = 64; size <= max_size; size *= 2) {
+		if (drm_WARN_ON(&i915->drm, num_hints >= ARRAY_SIZE(hints)))
+			break;
+
+		hints[num_hints].width = size;
+		hints[num_hints].height = size;
+		num_hints++;
+	}
+
+	drm_plane_add_size_hints_property(&plane->base, hints, num_hints);
+}
+
 struct intel_plane *
 intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 			  enum pipe pipe)
@@ -879,6 +901,8 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 						   DRM_MODE_ROTATE_0 |
 						   DRM_MODE_ROTATE_180);
 
+	intel_cursor_add_size_hints_property(cursor);
+
 	zpos = DISPLAY_RUNTIME_INFO(dev_priv)->num_sprites[pipe] + 1;
 	drm_plane_create_zpos_immutable_property(&cursor->base, zpos);
 
-- 
cgit 


From a1f95aede6285dba6dd036d907196f35ae3a11ea Mon Sep 17 00:00:00 2001
From: Huai-Yuan Liu <qq810974084@gmail.com>
Date: Sun, 7 Apr 2024 14:30:53 +0800
Subject: drm/arm/malidp: fix a possible null pointer dereference

In malidp_mw_connector_reset, new memory is allocated with kzalloc, but
no check is performed. In order to prevent null pointer dereferencing,
ensure that mw_state is checked before calling
__drm_atomic_helper_connector_reset.

Fixes: 8cbc5caf36ef ("drm: mali-dp: Add writeback connector")
Signed-off-by: Huai-Yuan Liu <qq810974084@gmail.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240407063053.5481-1-qq810974084@gmail.com
---
 drivers/gpu/drm/arm/malidp_mw.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/arm/malidp_mw.c b/drivers/gpu/drm/arm/malidp_mw.c
index 626709bec6f5..2577f0cef8fc 100644
--- a/drivers/gpu/drm/arm/malidp_mw.c
+++ b/drivers/gpu/drm/arm/malidp_mw.c
@@ -72,7 +72,10 @@ static void malidp_mw_connector_reset(struct drm_connector *connector)
 		__drm_atomic_helper_connector_destroy_state(connector->state);
 
 	kfree(connector->state);
-	__drm_atomic_helper_connector_reset(connector, &mw_state->base);
+	connector->state = NULL;
+
+	if (mw_state)
+		__drm_atomic_helper_connector_reset(connector, &mw_state->base);
 }
 
 static enum drm_connector_status
-- 
cgit 


From 49c13b4d2dd4a831225746e758893673f6ae961c Mon Sep 17 00:00:00 2001
From: Erico Nunes <nunes.erico@gmail.com>
Date: Fri, 5 Apr 2024 17:29:49 +0200
Subject: drm/lima: add mask irq callback to gp and pp

This is needed because we want to reset those devices in device-agnostic
code such as lima_sched.
In particular, masking irqs will be useful before a hard reset to
prevent race conditions.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405152951.1531555-2-nunes.erico@gmail.com
---
 drivers/gpu/drm/lima/lima_bcast.c | 12 ++++++++++++
 drivers/gpu/drm/lima/lima_bcast.h |  3 +++
 drivers/gpu/drm/lima/lima_gp.c    |  8 ++++++++
 drivers/gpu/drm/lima/lima_pp.c    | 18 ++++++++++++++++++
 drivers/gpu/drm/lima/lima_sched.h |  1 +
 5 files changed, 42 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/lima/lima_bcast.c b/drivers/gpu/drm/lima/lima_bcast.c
index fbc43f243c54..6d000504e1a4 100644
--- a/drivers/gpu/drm/lima/lima_bcast.c
+++ b/drivers/gpu/drm/lima/lima_bcast.c
@@ -43,6 +43,18 @@ void lima_bcast_suspend(struct lima_ip *ip)
 
 }
 
+int lima_bcast_mask_irq(struct lima_ip *ip)
+{
+	bcast_write(LIMA_BCAST_BROADCAST_MASK, 0);
+	bcast_write(LIMA_BCAST_INTERRUPT_MASK, 0);
+	return 0;
+}
+
+int lima_bcast_reset(struct lima_ip *ip)
+{
+	return lima_bcast_hw_init(ip);
+}
+
 int lima_bcast_init(struct lima_ip *ip)
 {
 	int i;
diff --git a/drivers/gpu/drm/lima/lima_bcast.h b/drivers/gpu/drm/lima/lima_bcast.h
index 465ee587bceb..cd08841e4787 100644
--- a/drivers/gpu/drm/lima/lima_bcast.h
+++ b/drivers/gpu/drm/lima/lima_bcast.h
@@ -13,4 +13,7 @@ void lima_bcast_fini(struct lima_ip *ip);
 
 void lima_bcast_enable(struct lima_device *dev, int num_pp);
 
+int lima_bcast_mask_irq(struct lima_ip *ip);
+int lima_bcast_reset(struct lima_ip *ip);
+
 #endif
diff --git a/drivers/gpu/drm/lima/lima_gp.c b/drivers/gpu/drm/lima/lima_gp.c
index 6b354e2fb61d..e15295071533 100644
--- a/drivers/gpu/drm/lima/lima_gp.c
+++ b/drivers/gpu/drm/lima/lima_gp.c
@@ -233,6 +233,13 @@ static void lima_gp_task_mmu_error(struct lima_sched_pipe *pipe)
 	lima_sched_pipe_task_done(pipe);
 }
 
+static void lima_gp_task_mask_irq(struct lima_sched_pipe *pipe)
+{
+	struct lima_ip *ip = pipe->processor[0];
+
+	gp_write(LIMA_GP_INT_MASK, 0);
+}
+
 static int lima_gp_task_recover(struct lima_sched_pipe *pipe)
 {
 	struct lima_ip *ip = pipe->processor[0];
@@ -365,6 +372,7 @@ int lima_gp_pipe_init(struct lima_device *dev)
 	pipe->task_error = lima_gp_task_error;
 	pipe->task_mmu_error = lima_gp_task_mmu_error;
 	pipe->task_recover = lima_gp_task_recover;
+	pipe->task_mask_irq = lima_gp_task_mask_irq;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c
index d0d2db0ef1ce..a4a2ffe6527c 100644
--- a/drivers/gpu/drm/lima/lima_pp.c
+++ b/drivers/gpu/drm/lima/lima_pp.c
@@ -429,6 +429,9 @@ static void lima_pp_task_error(struct lima_sched_pipe *pipe)
 
 		lima_pp_hard_reset(ip);
 	}
+
+	if (pipe->bcast_processor)
+		lima_bcast_reset(pipe->bcast_processor);
 }
 
 static void lima_pp_task_mmu_error(struct lima_sched_pipe *pipe)
@@ -437,6 +440,20 @@ static void lima_pp_task_mmu_error(struct lima_sched_pipe *pipe)
 		lima_sched_pipe_task_done(pipe);
 }
 
+static void lima_pp_task_mask_irq(struct lima_sched_pipe *pipe)
+{
+	int i;
+
+	for (i = 0; i < pipe->num_processor; i++) {
+		struct lima_ip *ip = pipe->processor[i];
+
+		pp_write(LIMA_PP_INT_MASK, 0);
+	}
+
+	if (pipe->bcast_processor)
+		lima_bcast_mask_irq(pipe->bcast_processor);
+}
+
 static struct kmem_cache *lima_pp_task_slab;
 static int lima_pp_task_slab_refcnt;
 
@@ -468,6 +485,7 @@ int lima_pp_pipe_init(struct lima_device *dev)
 	pipe->task_fini = lima_pp_task_fini;
 	pipe->task_error = lima_pp_task_error;
 	pipe->task_mmu_error = lima_pp_task_mmu_error;
+	pipe->task_mask_irq = lima_pp_task_mask_irq;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/lima/lima_sched.h b/drivers/gpu/drm/lima/lima_sched.h
index 6bd4f3b70109..85b23ba901d5 100644
--- a/drivers/gpu/drm/lima/lima_sched.h
+++ b/drivers/gpu/drm/lima/lima_sched.h
@@ -80,6 +80,7 @@ struct lima_sched_pipe {
 	void (*task_error)(struct lima_sched_pipe *pipe);
 	void (*task_mmu_error)(struct lima_sched_pipe *pipe);
 	int (*task_recover)(struct lima_sched_pipe *pipe);
+	void (*task_mask_irq)(struct lima_sched_pipe *pipe);
 
 	struct work_struct recover_work;
 };
-- 
cgit 


From d8100caf40a35904d27ce446fb2088b54277997a Mon Sep 17 00:00:00 2001
From: Erico Nunes <nunes.erico@gmail.com>
Date: Fri, 5 Apr 2024 17:29:50 +0200
Subject: drm/lima: include pp bcast irq in timeout handler check

In commit 53cb55b20208 ("drm/lima: handle spurious timeouts due to high
irq latency") a check was added to detect an unexpectedly high interrupt
latency timeout.
With further investigation it was noted that on Mali-450 the pp bcast
irq may also be a trigger of race conditions against the timeout
handler, so add it to this check too.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405152951.1531555-3-nunes.erico@gmail.com
---
 drivers/gpu/drm/lima/lima_sched.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 00b19adfc888..66841503a618 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -422,6 +422,8 @@ static enum drm_gpu_sched_stat lima_sched_timedout_job(struct drm_sched_job *job
 	 */
 	for (i = 0; i < pipe->num_processor; i++)
 		synchronize_irq(pipe->processor[i]->irq);
+	if (pipe->bcast_processor)
+		synchronize_irq(pipe->bcast_processor->irq);
 
 	if (dma_fence_is_signaled(task->fence)) {
 		DRM_WARN("%s unexpectedly high interrupt latency\n", lima_ip_name(ip));
-- 
cgit 


From a421cc7a6a001b70415aa4f66024fa6178885a14 Mon Sep 17 00:00:00 2001
From: Erico Nunes <nunes.erico@gmail.com>
Date: Fri, 5 Apr 2024 17:29:51 +0200
Subject: drm/lima: mask irqs in timeout path before hard reset

There is a race condition in which a rendering job might take just long
enough to trigger the drm sched job timeout handler but also still
complete before the hard reset is done by the timeout handler.
This runs into race conditions not expected by the timeout handler.
In some very specific cases it currently may result in a refcount
imbalance on lima_pm_idle, with a stack dump such as:

[10136.669170] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/lima/lima_devfreq.c:205 lima_devfreq_record_idle+0xa0/0xb0
...
[10136.669459] pc : lima_devfreq_record_idle+0xa0/0xb0
...
[10136.669628] Call trace:
[10136.669634]  lima_devfreq_record_idle+0xa0/0xb0
[10136.669646]  lima_sched_pipe_task_done+0x5c/0xb0
[10136.669656]  lima_gp_irq_handler+0xa8/0x120
[10136.669666]  __handle_irq_event_percpu+0x48/0x160
[10136.669679]  handle_irq_event+0x4c/0xc0

We can prevent that race condition entirely by masking the irqs at the
beginning of the timeout handler, at which point we give up on waiting
for that job entirely.
The irqs will be enabled again at the next hard reset which is already
done as a recovery by the timeout handler.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Reviewed-by: Qiang Yu <yuq825@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405152951.1531555-4-nunes.erico@gmail.com
---
 drivers/gpu/drm/lima/lima_sched.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 66841503a618..bbf3f8feab94 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -430,6 +430,13 @@ static enum drm_gpu_sched_stat lima_sched_timedout_job(struct drm_sched_job *job
 		return DRM_GPU_SCHED_STAT_NOMINAL;
 	}
 
+	/*
+	 * The task might still finish while this timeout handler runs.
+	 * To prevent a race condition on its completion, mask all irqs
+	 * on the running core until the next hard reset completes.
+	 */
+	pipe->task_mask_irq(pipe);
+
 	if (!pipe->error)
 		DRM_ERROR("%s job timeout\n", lima_ip_name(ip));
 
-- 
cgit 


From a6683c690bbfd1f371510cb051e8fa49507f3f5e Mon Sep 17 00:00:00 2001
From: Erico Nunes <nunes.erico@gmail.com>
Date: Tue, 2 Apr 2024 00:43:28 +0200
Subject: drm/lima: fix shared irq handling on driver remove

lima uses a shared interrupt, so the interrupt handlers must be prepared
to be called at any time. At driver removal time, the clocks are
disabled early and the interrupts stay registered until the very end of
the remove process due to the devm usage.
This is potentially a bug as the interrupts access device registers
which assumes clocks are enabled. A crash can be triggered by removing
the driver in a kernel with CONFIG_DEBUG_SHIRQ enabled.
This patch frees the interrupts at each lima device finishing callback
so that the handlers are already unregistered by the time we fully
disable clocks.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240401224329.1228468-2-nunes.erico@gmail.com
---
 drivers/gpu/drm/lima/lima_gp.c  | 2 ++
 drivers/gpu/drm/lima/lima_mmu.c | 5 +++++
 drivers/gpu/drm/lima/lima_pp.c  | 4 ++++
 3 files changed, 11 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/lima/lima_gp.c b/drivers/gpu/drm/lima/lima_gp.c
index e15295071533..3282997a0358 100644
--- a/drivers/gpu/drm/lima/lima_gp.c
+++ b/drivers/gpu/drm/lima/lima_gp.c
@@ -345,7 +345,9 @@ int lima_gp_init(struct lima_ip *ip)
 
 void lima_gp_fini(struct lima_ip *ip)
 {
+	struct lima_device *dev = ip->dev;
 
+	devm_free_irq(dev->dev, ip->irq, ip);
 }
 
 int lima_gp_pipe_init(struct lima_device *dev)
diff --git a/drivers/gpu/drm/lima/lima_mmu.c b/drivers/gpu/drm/lima/lima_mmu.c
index e18317c5ca8c..6611e2836bf0 100644
--- a/drivers/gpu/drm/lima/lima_mmu.c
+++ b/drivers/gpu/drm/lima/lima_mmu.c
@@ -118,7 +118,12 @@ int lima_mmu_init(struct lima_ip *ip)
 
 void lima_mmu_fini(struct lima_ip *ip)
 {
+	struct lima_device *dev = ip->dev;
+
+	if (ip->id == lima_ip_ppmmu_bcast)
+		return;
 
+	devm_free_irq(dev->dev, ip->irq, ip);
 }
 
 void lima_mmu_flush_tlb(struct lima_ip *ip)
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c
index a4a2ffe6527c..eaab4788dff4 100644
--- a/drivers/gpu/drm/lima/lima_pp.c
+++ b/drivers/gpu/drm/lima/lima_pp.c
@@ -286,7 +286,9 @@ int lima_pp_init(struct lima_ip *ip)
 
 void lima_pp_fini(struct lima_ip *ip)
 {
+	struct lima_device *dev = ip->dev;
 
+	devm_free_irq(dev->dev, ip->irq, ip);
 }
 
 int lima_pp_bcast_resume(struct lima_ip *ip)
@@ -319,7 +321,9 @@ int lima_pp_bcast_init(struct lima_ip *ip)
 
 void lima_pp_bcast_fini(struct lima_ip *ip)
 {
+	struct lima_device *dev = ip->dev;
 
+	devm_free_irq(dev->dev, ip->irq, ip);
 }
 
 static int lima_pp_task_validate(struct lima_sched_pipe *pipe,
-- 
cgit 


From b27a838f923ad29f03d968c3b8ae6303c3a509b7 Mon Sep 17 00:00:00 2001
From: Erico Nunes <nunes.erico@gmail.com>
Date: Tue, 2 Apr 2024 00:43:29 +0200
Subject: drm/lima: fix void pointer to enum lima_gpu_id cast warning

Create a simple data struct to hold compatible data so that we don't
have to do the casts to void pointer to hold data.
Fixes the following warning:
  drivers/gpu/drm/lima/lima_drv.c:387:13: error: cast to smaller integer
  type 'enum lima_gpu_id' from 'const void *'

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240401224329.1228468-3-nunes.erico@gmail.com
---
 drivers/gpu/drm/lima/lima_drv.c | 21 ++++++++++++++++++---
 drivers/gpu/drm/lima/lima_drv.h |  5 +++++
 2 files changed, 23 insertions(+), 3 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/lima/lima_drv.c b/drivers/gpu/drm/lima/lima_drv.c
index 10fd9154cc46..739c865b556f 100644
--- a/drivers/gpu/drm/lima/lima_drv.c
+++ b/drivers/gpu/drm/lima/lima_drv.c
@@ -371,6 +371,7 @@ static int lima_pdev_probe(struct platform_device *pdev)
 {
 	struct lima_device *ldev;
 	struct drm_device *ddev;
+	const struct lima_compatible *comp;
 	int err;
 
 	err = lima_sched_slab_init();
@@ -384,7 +385,13 @@ static int lima_pdev_probe(struct platform_device *pdev)
 	}
 
 	ldev->dev = &pdev->dev;
-	ldev->id = (enum lima_gpu_id)of_device_get_match_data(&pdev->dev);
+	comp = of_device_get_match_data(&pdev->dev);
+	if (!comp) {
+		err = -ENODEV;
+		goto err_out0;
+	}
+
+	ldev->id = comp->id;
 
 	platform_set_drvdata(pdev, ldev);
 
@@ -459,9 +466,17 @@ static void lima_pdev_remove(struct platform_device *pdev)
 	lima_sched_slab_fini();
 }
 
+static const struct lima_compatible lima_mali400_data = {
+	.id = lima_gpu_mali400,
+};
+
+static const struct lima_compatible lima_mali450_data = {
+	.id = lima_gpu_mali450,
+};
+
 static const struct of_device_id dt_match[] = {
-	{ .compatible = "arm,mali-400", .data = (void *)lima_gpu_mali400 },
-	{ .compatible = "arm,mali-450", .data = (void *)lima_gpu_mali450 },
+	{ .compatible = "arm,mali-400", .data = &lima_mali400_data },
+	{ .compatible = "arm,mali-450", .data = &lima_mali450_data },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dt_match);
diff --git a/drivers/gpu/drm/lima/lima_drv.h b/drivers/gpu/drm/lima/lima_drv.h
index c738d288547b..6706c19b166e 100644
--- a/drivers/gpu/drm/lima/lima_drv.h
+++ b/drivers/gpu/drm/lima/lima_drv.h
@@ -7,6 +7,7 @@
 #include <drm/drm_file.h>
 
 #include "lima_ctx.h"
+#include "lima_device.h"
 
 extern int lima_sched_timeout_ms;
 extern uint lima_heap_init_nr_pages;
@@ -39,6 +40,10 @@ struct lima_submit {
 	struct lima_sched_task *task;
 };
 
+struct lima_compatible {
+	enum lima_gpu_id id;
+};
+
 static inline struct lima_drm_priv *
 to_lima_drm_priv(struct drm_file *file)
 {
-- 
cgit 


From c534b63bede6cb987c2946ed4d0b0013a52c5ba7 Mon Sep 17 00:00:00 2001
From: Aleksandr Mishin <amishin@t-argos.ru>
Date: Tue, 9 Apr 2024 10:56:22 +0300
Subject: drm: vc4: Fix possible null pointer dereference

In vc4_hdmi_audio_init() of_get_address() may return
NULL which is later dereferenced. Fix this bug by adding NULL check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: bb7d78568814 ("drm/vc4: Add HDMI audio support")
Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409075622.11783-1-amishin@t-argos.ru
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index d8751ea20303..5f8d51b29370 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -2740,6 +2740,8 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
 		index = 1;
 
 	addr = of_get_address(dev->of_node, index, NULL, NULL);
+	if (!addr)
+		return -EINVAL;
 
 	vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset;
 	vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-- 
cgit 


From a57e191ebbaa0363dbf352cc37447c2230573e29 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Fri, 5 Apr 2024 16:35:10 +0200
Subject: drm: fix DRM_DISPLAY_DP_HELPER dependencies, part 2

After my fix yesterday, I ran into another problem of the same kind:

aarch64-linux-ld: drivers/gpu/drm/bridge/analogix/analogix_dp_core.o: in function `drm_dp_dpcd_readb':
analogix_dp_core.c:(.text+0x194): undefined reference to `drm_dp_dpcd_read'
aarch64-linux-ld: drivers/gpu/drm/bridge/analogix/analogix_dp_core.o: in function `drm_dp_dpcd_writeb':
analogix_dp_core.c:(.text+0x214): undefined reference to `drm_dp_dpcd_write'
aarch64-linux-ld: drivers/gpu/drm/bridge/analogix/analogix_dp_core.o: in function `analogix_dp_stop_crc':
analogix_dp_core.c:(.text+0x4b0): undefined reference to `drm_dp_stop_crc'
aarch64-linux-ld: drivers/gpu/drm/bridge/analogix/analogix_dp_core.o: in function `analogix_dp_start_crc':
analogix_dp_core.c:(.text+0xbe8): undefined reference to `drm_dp_start_crc'

Add the same dependency again to ROCKCHIP_ANALOGIX_DP after checking that
nothing else selects the analogix driver. Also add a dependency to
DRM_ANALOGIX_DP to make it easier to identifier future problems of
this type when they get introduced.

Fixes: 0323287de87d ("drm: Switch DRM_DISPLAY_DP_HELPER to depends on")
Fixes: d1ef8fc18be6 ("drm: fix DRM_DISPLAY_DP_HELPER dependencies")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405143531.925589-1-arnd@kernel.org
---
 drivers/gpu/drm/bridge/analogix/Kconfig | 2 +-
 drivers/gpu/drm/rockchip/Kconfig        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
index 12bfea53bf24..5b564fded6d6 100644
--- a/drivers/gpu/drm/bridge/analogix/Kconfig
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -28,7 +28,7 @@ config DRM_ANALOGIX_ANX78XX
 
 config DRM_ANALOGIX_DP
 	tristate
-	depends on DRM
+	depends on DRM_DISPLAY_HELPER
 
 config DRM_ANALOGIX_ANX7625
 	tristate "Analogix Anx7625 MIPI to DP interface support"
diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 4b4ad75032fd..4c7072e6e34e 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -36,7 +36,7 @@ config ROCKCHIP_VOP2
 config ROCKCHIP_ANALOGIX_DP
 	bool "Rockchip specific extensions for Analogix DP driver"
 	depends on DRM_DISPLAY_DP_HELPER
-	depends on DRM_DISPLAY_HELPER
+	depends on DRM_DISPLAY_HELPER=y || (DRM_DISPLAY_HELPER=m && DRM_ROCKCHIP=m)
 	depends on ROCKCHIP_VOP
 	help
 	  This selects support for Rockchip SoC specific extensions
-- 
cgit 


From 3ddbd345539eb89cb1ccceb79ef0a3c150aeebbf Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 9 Apr 2024 12:46:09 +0300
Subject: drm/edid: add drm_edid_get_product_id()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a struct drm_edid based function to get the vendor and product ID
from an EDID. Add a separate struct for defining this part of the EDID,
with defined byte order for manufacturer name, product code and serial
number.

v2: Define manufacturer_name as __be16 instead of u8[2] (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/df0e7dedbf7f2c190039d6e6eae3e126eba113c9.1712655867.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index ea77577a3786..626a0e24e66a 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2756,6 +2756,21 @@ const struct drm_edid *drm_edid_read(struct drm_connector *connector)
 }
 EXPORT_SYMBOL(drm_edid_read);
 
+/**
+ * drm_edid_get_product_id - Get the vendor and product identification
+ * @drm_edid: EDID
+ * @id: Where to place the product id
+ */
+void drm_edid_get_product_id(const struct drm_edid *drm_edid,
+			     struct drm_edid_product_id *id)
+{
+	if (drm_edid && drm_edid->edid && drm_edid->size >= EDID_LENGTH)
+		memcpy(id, &drm_edid->edid->product_id, sizeof(*id));
+	else
+		memset(id, 0, sizeof(*id));
+}
+EXPORT_SYMBOL(drm_edid_get_product_id);
+
 /**
  * drm_edid_get_panel_id - Get a panel's ID from EDID
  * @drm_edid: EDID that contains panel ID.
-- 
cgit 


From 3f56e5514bfd99aaba649e4af6b11a11b731d3a2 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 9 Apr 2024 12:46:10 +0300
Subject: drm/edid: add drm_edid_print_product_id()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Add a function to print a decoded EDID vendor and product id to a drm
printer, optionally with the raw data.

v2:
- refactor date printing
- use seq_buf to avoid kasprintf() (Ville)
- handle week == 0 (Ville)
- use be16_to_cpu() on manufacturer_name

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Melissa Wen <mwen@igalia.com> # v1
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/32bbc83ee6557809ef6d7a5edb1bc8ef4d56d10f.1712655867.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 626a0e24e66a..1400722ae3fe 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -29,12 +29,14 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/byteorder/generic.h>
 #include <linux/cec.h>
 #include <linux/hdmi.h>
 #include <linux/i2c.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <linux/seq_buf.h>
 #include <linux/slab.h>
 #include <linux/vga_switcheroo.h>
 
@@ -2771,6 +2773,48 @@ void drm_edid_get_product_id(const struct drm_edid *drm_edid,
 }
 EXPORT_SYMBOL(drm_edid_get_product_id);
 
+static void decode_date(struct seq_buf *s, const struct drm_edid_product_id *id)
+{
+	int week = id->week_of_manufacture;
+	int year = id->year_of_manufacture + 1990;
+
+	if (week == 0xff)
+		seq_buf_printf(s, "model year: %d", year);
+	else if (!week)
+		seq_buf_printf(s, "year of manufacture: %d", year);
+	else
+		seq_buf_printf(s, "week/year of manufacture: %d/%d", week, year);
+}
+
+/**
+ * drm_edid_print_product_id - Print decoded product id to printer
+ * @p: drm printer
+ * @id: EDID product id
+ * @raw: If true, also print the raw hex
+ *
+ * See VESA E-EDID 1.4 section 3.4.
+ */
+void drm_edid_print_product_id(struct drm_printer *p,
+			       const struct drm_edid_product_id *id, bool raw)
+{
+	DECLARE_SEQ_BUF(date, 40);
+	char vend[4];
+
+	drm_edid_decode_mfg_id(be16_to_cpu(id->manufacturer_name), vend);
+
+	decode_date(&date, id);
+
+	drm_printf(p, "manufacturer name: %s, product code: %u, serial number: %u, %s\n",
+		   vend, le16_to_cpu(id->product_code),
+		   le32_to_cpu(id->serial_number), seq_buf_str(&date));
+
+	if (raw)
+		drm_printf(p, "raw product id: %*ph\n", (int)sizeof(*id), id);
+
+	WARN_ON(seq_buf_has_overflowed(&date));
+}
+EXPORT_SYMBOL(drm_edid_print_product_id);
+
 /**
  * drm_edid_get_panel_id - Get a panel's ID from EDID
  * @drm_edid: EDID that contains panel ID.
-- 
cgit 


From 6d2475823bc20423aad8a21693620c7593de187f Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 9 Apr 2024 12:46:11 +0300
Subject: drm/i915/bios: switch to struct drm_edid and struct
 drm_edid_product_id
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

To avoid accessing and parsing the raw EDID with drm_edid_raw(), switch
to the struct drm_edid based function to extract product id, and use the
drm printer function to debug log it.

The underlying assumption is that struct drm_edid_product_id and struct
lvds_pnp_id describe identical data, albeit with slightly different
member definitions.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ec5148dd43221b32cb2066bc7fd264a069c1188b.1712655867.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 43 +++++++++++++------------------
 1 file changed, 18 insertions(+), 25 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 52bd3576835b..29371f1f0625 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -598,6 +598,9 @@ get_lvds_pnp_id(const struct bdb_lvds_lfp_data *data,
 		const struct bdb_lvds_lfp_data_ptrs *ptrs,
 		int index)
 {
+	/* These two are supposed to have the same layout in memory. */
+	BUILD_BUG_ON(sizeof(struct lvds_pnp_id) != sizeof(struct drm_edid_product_id));
+
 	return (const void *)data + ptrs->ptr[index].panel_pnp_id.offset;
 }
 
@@ -611,19 +614,6 @@ get_lfp_data_tail(const struct bdb_lvds_lfp_data *data,
 		return NULL;
 }
 
-static void dump_pnp_id(struct drm_i915_private *i915,
-			const struct lvds_pnp_id *pnp_id,
-			const char *name)
-{
-	u16 mfg_name = be16_to_cpu((__force __be16)pnp_id->mfg_name);
-	char vend[4];
-
-	drm_dbg_kms(&i915->drm, "%s PNPID mfg: %s (0x%x), prod: %u, serial: %u, week: %d, year: %d\n",
-		    name, drm_edid_decode_mfg_id(mfg_name, vend),
-		    pnp_id->mfg_name, pnp_id->product_code, pnp_id->serial,
-		    pnp_id->mfg_week, pnp_id->mfg_year + 1990);
-}
-
 static int opregion_get_panel_type(struct drm_i915_private *i915,
 				   const struct intel_bios_encoder_data *devdata,
 				   const struct drm_edid *drm_edid, bool use_fallback)
@@ -662,21 +652,21 @@ static int pnpid_get_panel_type(struct drm_i915_private *i915,
 {
 	const struct bdb_lvds_lfp_data *data;
 	const struct bdb_lvds_lfp_data_ptrs *ptrs;
-	const struct lvds_pnp_id *edid_id;
-	struct lvds_pnp_id edid_id_nodate;
-	const struct edid *edid = drm_edid_raw(drm_edid); /* FIXME */
+	struct drm_edid_product_id product_id, product_id_nodate;
+	struct drm_printer p;
 	int i, best = -1;
 
-	if (!edid)
+	if (!drm_edid)
 		return -1;
 
-	edid_id = (const void *)&edid->mfg_id[0];
+	drm_edid_get_product_id(drm_edid, &product_id);
 
-	edid_id_nodate = *edid_id;
-	edid_id_nodate.mfg_week = 0;
-	edid_id_nodate.mfg_year = 0;
+	product_id_nodate = product_id;
+	product_id_nodate.week_of_manufacture = 0;
+	product_id_nodate.year_of_manufacture = 0;
 
-	dump_pnp_id(i915, edid_id, "EDID");
+	p = drm_dbg_printer(&i915->drm, DRM_UT_KMS, "EDID");
+	drm_edid_print_product_id(&p, &product_id, true);
 
 	ptrs = bdb_find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
 	if (!ptrs)
@@ -691,7 +681,7 @@ static int pnpid_get_panel_type(struct drm_i915_private *i915,
 			get_lvds_pnp_id(data, ptrs, i);
 
 		/* full match? */
-		if (!memcmp(vbt_id, edid_id, sizeof(*vbt_id)))
+		if (!memcmp(vbt_id, &product_id, sizeof(*vbt_id)))
 			return i;
 
 		/*
@@ -699,7 +689,7 @@ static int pnpid_get_panel_type(struct drm_i915_private *i915,
 		 * and the VBT entry does not specify a date.
 		 */
 		if (best < 0 &&
-		    !memcmp(vbt_id, &edid_id_nodate, sizeof(*vbt_id)))
+		    !memcmp(vbt_id, &product_id_nodate, sizeof(*vbt_id)))
 			best = i;
 	}
 
@@ -886,6 +876,7 @@ parse_lfp_data(struct drm_i915_private *i915,
 	const struct bdb_lvds_lfp_data_tail *tail;
 	const struct bdb_lvds_lfp_data_ptrs *ptrs;
 	const struct lvds_pnp_id *pnp_id;
+	struct drm_printer p;
 	int panel_type = panel->vbt.panel_type;
 
 	ptrs = bdb_find_section(i915, BDB_LVDS_LFP_DATA_PTRS);
@@ -900,7 +891,9 @@ parse_lfp_data(struct drm_i915_private *i915,
 		parse_lfp_panel_dtd(i915, panel, data, ptrs);
 
 	pnp_id = get_lvds_pnp_id(data, ptrs, panel_type);
-	dump_pnp_id(i915, pnp_id, "Panel");
+
+	p = drm_dbg_printer(&i915->drm, DRM_UT_KMS, "Panel");
+	drm_edid_print_product_id(&p, (const struct drm_edid_product_id *)pnp_id, false);
 
 	tail = get_lfp_data_tail(data, ptrs);
 	if (!tail)
-- 
cgit 


From 1701e62fa89fb368339ff48fe3dfad1a400ff239 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 9 Apr 2024 12:46:12 +0300
Subject: drm/i915/bios: return drm_edid_product_id from get_lvds_pnp_id()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Use a more suitable type to avoid the cast.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4dc7bfc48e65d29829843941a70c8bf97b87abcc.1712655867.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 29371f1f0625..a620d926cc8c 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -593,7 +593,7 @@ get_lvds_fp_timing(const struct bdb_lvds_lfp_data *data,
 	return (const void *)data + ptrs->ptr[index].fp_timing.offset;
 }
 
-static const struct lvds_pnp_id *
+static const struct drm_edid_product_id *
 get_lvds_pnp_id(const struct bdb_lvds_lfp_data *data,
 		const struct bdb_lvds_lfp_data_ptrs *ptrs,
 		int index)
@@ -677,7 +677,7 @@ static int pnpid_get_panel_type(struct drm_i915_private *i915,
 		return -1;
 
 	for (i = 0; i < 16; i++) {
-		const struct lvds_pnp_id *vbt_id =
+		const struct drm_edid_product_id *vbt_id =
 			get_lvds_pnp_id(data, ptrs, i);
 
 		/* full match? */
@@ -875,7 +875,7 @@ parse_lfp_data(struct drm_i915_private *i915,
 	const struct bdb_lvds_lfp_data *data;
 	const struct bdb_lvds_lfp_data_tail *tail;
 	const struct bdb_lvds_lfp_data_ptrs *ptrs;
-	const struct lvds_pnp_id *pnp_id;
+	const struct drm_edid_product_id *pnp_id;
 	struct drm_printer p;
 	int panel_type = panel->vbt.panel_type;
 
@@ -893,7 +893,7 @@ parse_lfp_data(struct drm_i915_private *i915,
 	pnp_id = get_lvds_pnp_id(data, ptrs, panel_type);
 
 	p = drm_dbg_printer(&i915->drm, DRM_UT_KMS, "Panel");
-	drm_edid_print_product_id(&p, (const struct drm_edid_product_id *)pnp_id, false);
+	drm_edid_print_product_id(&p, pnp_id, false);
 
 	tail = get_lfp_data_tail(data, ptrs);
 	if (!tail)
-- 
cgit 


From 98618005d34e81d04fc399f01570b1a0fd3b7045 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:23:56 +0300
Subject: drm/probe-helper: switch to drm device based logging

Prefer drm_dbg_kms() over DRM_DEBUG_KMS() to debug log the drm device
info.

v2: Drop changes to mode printing (Ville)

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> # v1
Link: https://patchwork.freedesktop.org/patch/msgid/8b6a83edd1c3896b9d652b5368702eba5f382a1c.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_probe_helper.c | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 968a3ee66b1e..19bf5d298257 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -567,8 +567,8 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 
 	drm_modeset_acquire_init(&ctx, 0);
 
-	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
-			connector->name);
+	drm_dbg_kms(dev, "[CONNECTOR:%d:%s]\n", connector->base.id,
+		    connector->name);
 
 retry:
 	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
@@ -611,11 +611,10 @@ retry:
 	 * check here, and if anything changed start the hotplug code.
 	 */
 	if (old_status != connector->status) {
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
-			      connector->base.id,
-			      connector->name,
-			      drm_get_connector_status_name(old_status),
-			      drm_get_connector_status_name(connector->status));
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",
+			    connector->base.id, connector->name,
+			    drm_get_connector_status_name(old_status),
+			    drm_get_connector_status_name(connector->status));
 
 		/*
 		 * The hotplug event code might call into the fb
@@ -638,8 +637,8 @@ retry:
 		drm_kms_helper_poll_enable(dev);
 
 	if (connector->status == connector_status_disconnected) {
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
-			connector->base.id, connector->name);
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] disconnected\n",
+			    connector->base.id, connector->name);
 		drm_connector_update_edid_property(connector, NULL);
 		drm_mode_prune_invalid(dev, &connector->modes, false);
 		goto exit;
@@ -697,8 +696,9 @@ exit:
 
 	drm_mode_sort(&connector->modes);
 
-	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
-			connector->name);
+	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] probed modes:\n",
+		    connector->base.id, connector->name);
+
 	list_for_each_entry(mode, &connector->modes, head) {
 		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
 		drm_mode_debug_printmodeline(mode);
@@ -834,14 +834,12 @@ static void output_poll_execute(struct work_struct *work)
 			old = drm_get_connector_status_name(old_status);
 			new = drm_get_connector_status_name(connector->status);
 
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
-				      "status updated from %s to %s\n",
-				      connector->base.id,
-				      connector->name,
-				      old, new);
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",
-				      connector->base.id, connector->name,
-				      old_epoch_counter, connector->epoch_counter);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",
+				    connector->base.id, connector->name,
+				    old, new);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",
+				    connector->base.id, connector->name,
+				    old_epoch_counter, connector->epoch_counter);
 
 			changed = true;
 		}
-- 
cgit 


From 0ae55a4c9af6ce44be95d8cfd755eb8fa591cf48 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:23:57 +0300
Subject: drm/modes: switch to drm device based error logging

Prefer drm_err() and drm_dbg_kms() over DRM_ERROR() and DRM_DEBUG_KMS().

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/3342dd2e98fedd618e5aeef26c44044cd32ead20.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_modes.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index c4f88c3a93b7..408ee1b5e44d 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -373,8 +373,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (hact_duration_ns < params->hact_ns.min ||
 	     hact_duration_ns > params->hact_ns.max)) {
-		DRM_ERROR("Invalid horizontal active area duration: %uns (min: %u, max %u)\n",
-			  hact_duration_ns, params->hact_ns.min, params->hact_ns.max);
+		drm_err(dev, "Invalid horizontal active area duration: %uns (min: %u, max %u)\n",
+			hact_duration_ns, params->hact_ns.min, params->hact_ns.max);
 		return -EINVAL;
 	}
 
@@ -385,8 +385,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (hblk_duration_ns < params->hblk_ns.min ||
 	     hblk_duration_ns > params->hblk_ns.max)) {
-		DRM_ERROR("Invalid horizontal blanking duration: %uns (min: %u, max %u)\n",
-			  hblk_duration_ns, params->hblk_ns.min, params->hblk_ns.max);
+		drm_err(dev, "Invalid horizontal blanking duration: %uns (min: %u, max %u)\n",
+			hblk_duration_ns, params->hblk_ns.min, params->hblk_ns.max);
 		return -EINVAL;
 	}
 
@@ -397,8 +397,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (hslen_duration_ns < params->hslen_ns.min ||
 	     hslen_duration_ns > params->hslen_ns.max)) {
-		DRM_ERROR("Invalid horizontal sync duration: %uns (min: %u, max %u)\n",
-			  hslen_duration_ns, params->hslen_ns.min, params->hslen_ns.max);
+		drm_err(dev, "Invalid horizontal sync duration: %uns (min: %u, max %u)\n",
+			hslen_duration_ns, params->hslen_ns.min, params->hslen_ns.max);
 		return -EINVAL;
 	}
 
@@ -409,7 +409,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (porches_duration_ns > (params->hfp_ns.max + params->hbp_ns.max) ||
 	     porches_duration_ns < (params->hfp_ns.min + params->hbp_ns.min))) {
-		DRM_ERROR("Invalid horizontal porches duration: %uns\n", porches_duration_ns);
+		drm_err(dev, "Invalid horizontal porches duration: %uns\n",
+			porches_duration_ns);
 		return -EINVAL;
 	}
 
@@ -431,8 +432,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (hfp_duration_ns < params->hfp_ns.min ||
 	     hfp_duration_ns > params->hfp_ns.max)) {
-		DRM_ERROR("Invalid horizontal front porch duration: %uns (min: %u, max %u)\n",
-			  hfp_duration_ns, params->hfp_ns.min, params->hfp_ns.max);
+		drm_err(dev, "Invalid horizontal front porch duration: %uns (min: %u, max %u)\n",
+			hfp_duration_ns, params->hfp_ns.min, params->hfp_ns.max);
 		return -EINVAL;
 	}
 
@@ -443,8 +444,8 @@ static int fill_analog_mode(struct drm_device *dev,
 	if (!bt601 &&
 	    (hbp_duration_ns < params->hbp_ns.min ||
 	     hbp_duration_ns > params->hbp_ns.max)) {
-		DRM_ERROR("Invalid horizontal back porch duration: %uns (min: %u, max %u)\n",
-			  hbp_duration_ns, params->hbp_ns.min, params->hbp_ns.max);
+		drm_err(dev, "Invalid horizontal back porch duration: %uns (min: %u, max %u)\n",
+			hbp_duration_ns, params->hbp_ns.min, params->hbp_ns.max);
 		return -EINVAL;
 	}
 
@@ -495,8 +496,8 @@ static int fill_analog_mode(struct drm_device *dev,
 
 	vtotal = vactive + vfp + vslen + vbp;
 	if (params->num_lines != vtotal) {
-		DRM_ERROR("Invalid vertical total: %upx (expected %upx)\n",
-			  vtotal, params->num_lines);
+		drm_err(dev, "Invalid vertical total: %upx (expected %upx)\n",
+			vtotal, params->num_lines);
 		return -EINVAL;
 	}
 
@@ -1813,9 +1814,9 @@ void drm_mode_prune_invalid(struct drm_device *dev,
 			}
 			if (verbose) {
 				drm_mode_debug_printmodeline(mode);
-				DRM_DEBUG_KMS("Not using %s mode: %s\n",
-					      mode->name,
-					      drm_get_mode_status_name(mode->status));
+				drm_dbg_kms(dev, "Not using %s mode: %s\n",
+					    mode->name,
+					    drm_get_mode_status_name(mode->status));
 			}
 			drm_mode_destroy(dev, mode);
 		}
-- 
cgit 


From 6b2a8a050fe8dcb8f6539733dfc0743a19596164 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:23:58 +0300
Subject: drm/sysfs: switch to drm device based logging

Prefer drm_dbg_kms() and drm_dbg_lease() over DRM_DEBUG_KMS() and
DRM_DEBUG() to debug log the drm device info. Fix some debug categories
and unify connector logging while at it.

v2: Drop superfluous newline

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/7f3dd5b4a33f964c6903c7a964da5397f4084aeb.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_sysfs.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index a953f69a34b6..bd9b8ab4f82b 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -209,10 +209,9 @@ static ssize_t status_store(struct device *device,
 		ret = -EINVAL;
 
 	if (old_force != connector->force || !connector->force) {
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force updated from %d to %d or reprobing\n",
-			      connector->base.id,
-			      connector->name,
-			      old_force, connector->force);
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] force updated from %d to %d or reprobing\n",
+			    connector->base.id, connector->name,
+			    old_force, connector->force);
 
 		connector->funcs->fill_modes(connector,
 					     dev->mode_config.max_width,
@@ -383,8 +382,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
 	if (r)
 		goto err_free;
 
-	DRM_DEBUG("adding \"%s\" to sysfs\n",
-		  connector->name);
+	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] adding connector to sysfs\n",
+		    connector->base.id, connector->name);
 
 	r = device_add(kdev);
 	if (r) {
@@ -430,8 +429,9 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
 	if (dev_fwnode(connector->kdev))
 		component_del(connector->kdev, &typec_connector_ops);
 
-	DRM_DEBUG("removing \"%s\" from sysfs\n",
-		  connector->name);
+	drm_dbg_kms(connector->dev,
+		    "[CONNECTOR:%d:%s] removing connector from sysfs\n",
+		    connector->base.id, connector->name);
 
 	device_unregister(connector->kdev);
 	connector->kdev = NULL;
@@ -442,7 +442,7 @@ void drm_sysfs_lease_event(struct drm_device *dev)
 	char *event_string = "LEASE=1";
 	char *envp[] = { event_string, NULL };
 
-	DRM_DEBUG("generating lease event\n");
+	drm_dbg_lease(dev, "generating lease event\n");
 
 	kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
 }
@@ -463,7 +463,7 @@ void drm_sysfs_hotplug_event(struct drm_device *dev)
 	char *event_string = "HOTPLUG=1";
 	char *envp[] = { event_string, NULL };
 
-	DRM_DEBUG("generating hotplug event\n");
+	drm_dbg_kms(dev, "generating hotplug event\n");
 
 	kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
 }
-- 
cgit 


From 14b7897d52f3389478c9700a7d97167bff182f01 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:23:59 +0300
Subject: drm/client: switch to drm device based logging, and more

Switch to drm device based logging and WARNs, and unify connector and
crtc logging formats. Pass drm device around a bit more to be able to do
this. Drop logging for -ENOMEM.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/4fb77e6039bcda7448d1187bc5cd7a5ac4d393aa.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_client_modeset.c | 129 +++++++++++++++++++----------------
 1 file changed, 70 insertions(+), 59 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
index 871e4e2129d6..cb29a957a900 100644
--- a/drivers/gpu/drm/drm_client_modeset.c
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -242,8 +242,10 @@ static void drm_client_connectors_enabled(struct drm_connector **connectors,
 	for (i = 0; i < connector_count; i++) {
 		connector = connectors[i];
 		enabled[i] = drm_connector_enabled(connector, true);
-		DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
-			      connector->display_info.non_desktop ? "non desktop" : str_yes_no(enabled[i]));
+		drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s] enabled? %s\n",
+			    connector->base.id, connector->name,
+			    connector->display_info.non_desktop ?
+			    "non desktop" : str_yes_no(enabled[i]));
 
 		any_enabled |= enabled[i];
 	}
@@ -303,7 +305,7 @@ static bool drm_client_target_cloned(struct drm_device *dev,
 	}
 
 	if (can_clone) {
-		DRM_DEBUG_KMS("can clone using command line\n");
+		drm_dbg_kms(dev, "can clone using command line\n");
 		return true;
 	}
 
@@ -332,15 +334,16 @@ static bool drm_client_target_cloned(struct drm_device *dev,
 	kfree(dmt_mode);
 
 	if (can_clone) {
-		DRM_DEBUG_KMS("can clone using 1024x768\n");
+		drm_dbg_kms(dev, "can clone using 1024x768\n");
 		return true;
 	}
 fail:
-	DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
+	drm_info(dev, "kms: can't enable cloning when we probably wanted to.\n");
 	return false;
 }
 
-static int drm_client_get_tile_offsets(struct drm_connector **connectors,
+static int drm_client_get_tile_offsets(struct drm_device *dev,
+				       struct drm_connector **connectors,
 				       unsigned int connector_count,
 				       struct drm_display_mode **modes,
 				       struct drm_client_offset *offsets,
@@ -357,8 +360,9 @@ static int drm_client_get_tile_offsets(struct drm_connector **connectors,
 			continue;
 
 		if (!modes[i] && (h_idx || v_idx)) {
-			DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i,
-				      connector->base.id);
+			drm_dbg_kms(dev,
+				    "[CONNECTOR:%d:%s] no modes for connector tiled %d\n",
+				    connector->base.id, connector->name, i);
 			continue;
 		}
 		if (connector->tile_h_loc < h_idx)
@@ -369,11 +373,12 @@ static int drm_client_get_tile_offsets(struct drm_connector **connectors,
 	}
 	offsets[idx].x = hoffset;
 	offsets[idx].y = voffset;
-	DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx);
+	drm_dbg_kms(dev, "returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx);
 	return 0;
 }
 
-static bool drm_client_target_preferred(struct drm_connector **connectors,
+static bool drm_client_target_preferred(struct drm_device *dev,
+					struct drm_connector **connectors,
 					unsigned int connector_count,
 					struct drm_display_mode **modes,
 					struct drm_client_offset *offsets,
@@ -423,17 +428,19 @@ retry:
 			 * find the tile offsets for this pass - need to find
 			 * all tiles left and above
 			 */
-			drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i,
+			drm_client_get_tile_offsets(dev, connectors, connector_count,
+						    modes, offsets, i,
 						    connector->tile_h_loc, connector->tile_v_loc);
 		}
-		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
-			      connector->base.id);
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] looking for cmdline mode\n",
+			    connector->base.id, connector->name);
 
 		/* got for command line mode first */
 		modes[i] = drm_connector_pick_cmdline_mode(connector);
 		if (!modes[i]) {
-			DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n",
-				      connector->base.id, connector->tile_group ? connector->tile_group->id : 0);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] looking for preferred mode, tile %d\n",
+				    connector->base.id, connector->name,
+				    connector->tile_group ? connector->tile_group->id : 0);
 			modes[i] = drm_connector_has_preferred_mode(connector, width, height);
 		}
 		/* No preferred modes, pick one off the list */
@@ -455,16 +462,18 @@ retry:
 			    (connector->tile_h_loc == 0 &&
 			     connector->tile_v_loc == 0 &&
 			     !drm_connector_get_tiled_mode(connector))) {
-				DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
-					      connector->base.id);
+				drm_dbg_kms(dev,
+					    "[CONNECTOR:%d:%s] Falling back to non-tiled mode\n",
+					    connector->base.id, connector->name);
 				modes[i] = drm_connector_fallback_non_tiled_mode(connector);
 			} else {
 				modes[i] = drm_connector_get_tiled_mode(connector);
 			}
 		}
 
-		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
-			  "none");
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Found mode %s\n",
+			    connector->base.id, connector->name,
+			    modes[i] ? modes[i]->name : "none");
 		conn_configured |= BIT_ULL(i);
 	}
 
@@ -585,7 +594,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
 	if (!drm_drv_uses_atomic_modeset(dev))
 		return false;
 
-	if (WARN_ON(count <= 0))
+	if (drm_WARN_ON(dev, count <= 0))
 		return false;
 
 	save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
@@ -624,26 +633,26 @@ retry:
 			num_connectors_detected++;
 
 		if (!enabled[i]) {
-			DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
-				      connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] not enabled, skipping\n",
+				    connector->base.id, connector->name);
 			conn_configured |= BIT(i);
 			continue;
 		}
 
 		if (connector->force == DRM_FORCE_OFF) {
-			DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
-				      connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] disabled by user, skipping\n",
+				    connector->base.id, connector->name);
 			enabled[i] = false;
 			continue;
 		}
 
 		encoder = connector->state->best_encoder;
-		if (!encoder || WARN_ON(!connector->state->crtc)) {
+		if (!encoder || drm_WARN_ON(dev, !connector->state->crtc)) {
 			if (connector->force > DRM_FORCE_OFF)
 				goto bail;
 
-			DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
-				      connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] has no encoder or crtc, skipping\n",
+				    connector->base.id, connector->name);
 			enabled[i] = false;
 			conn_configured |= BIT(i);
 			continue;
@@ -660,28 +669,30 @@ retry:
 		 */
 		for (j = 0; j < count; j++) {
 			if (crtcs[j] == new_crtc) {
-				DRM_DEBUG_KMS("fallback: cloned configuration\n");
+				drm_dbg_kms(dev, "fallback: cloned configuration\n");
 				goto bail;
 			}
 		}
 
-		DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
-			      connector->name);
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] looking for cmdline mode\n",
+			    connector->base.id, connector->name);
 
 		/* go for command line mode first */
 		modes[i] = drm_connector_pick_cmdline_mode(connector);
 
 		/* try for preferred next */
 		if (!modes[i]) {
-			DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
-				      connector->name, connector->has_tile);
+			drm_dbg_kms(dev,
+				    "[CONNECTOR:%d:%s] looking for preferred mode, has tile: %s\n",
+				    connector->base.id, connector->name,
+				    str_yes_no(connector->has_tile));
 			modes[i] = drm_connector_has_preferred_mode(connector, width, height);
 		}
 
 		/* No preferred mode marked by the EDID? Are there any modes? */
 		if (!modes[i] && !list_empty(&connector->modes)) {
-			DRM_DEBUG_KMS("using first mode listed on connector %s\n",
-				      connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] using first listed mode\n",
+				    connector->base.id, connector->name);
 			modes[i] = list_first_entry(&connector->modes,
 						    struct drm_display_mode,
 						    head);
@@ -700,8 +711,8 @@ retry:
 			 * This is crtc->mode and not crtc->state->mode for the
 			 * fastboot check to work correctly.
 			 */
-			DRM_DEBUG_KMS("looking for current mode on connector %s\n",
-				      connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] looking for current mode\n",
+				    connector->base.id, connector->name);
 			modes[i] = &connector->state->crtc->mode;
 		}
 		/*
@@ -710,18 +721,18 @@ retry:
 		 */
 		if (connector->has_tile &&
 		    num_tiled_conns < connector->num_h_tile * connector->num_v_tile) {
-			DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
-				      connector->base.id);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Falling back to non-tiled mode\n",
+				    connector->base.id, connector->name);
 			modes[i] = drm_connector_fallback_non_tiled_mode(connector);
 		}
 		crtcs[i] = new_crtc;
 
-		DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
-			      connector->name,
-			      connector->state->crtc->base.id,
-			      connector->state->crtc->name,
-			      modes[i]->hdisplay, modes[i]->vdisplay,
-			      modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
+		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] on [CRTC:%d:%s]: %dx%d%s\n",
+			    connector->base.id, connector->name,
+			    connector->state->crtc->base.id,
+			    connector->state->crtc->name,
+			    modes[i]->hdisplay, modes[i]->vdisplay,
+			    modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
 
 		fallback = false;
 		conn_configured |= BIT(i);
@@ -737,15 +748,15 @@ retry:
 	 */
 	if (num_connectors_enabled != num_connectors_detected &&
 	    num_connectors_enabled < dev->mode_config.num_crtc) {
-		DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
-		DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
-			      num_connectors_detected);
+		drm_dbg_kms(dev, "fallback: Not all outputs enabled\n");
+		drm_dbg_kms(dev, "Enabled: %i, detected: %i\n",
+			    num_connectors_enabled, num_connectors_detected);
 		fallback = true;
 	}
 
 	if (fallback) {
 bail:
-		DRM_DEBUG_KMS("Not using firmware configuration\n");
+		drm_dbg_kms(dev, "Not using firmware configuration\n");
 		memcpy(enabled, save_enabled, count);
 		ret = false;
 	}
@@ -782,7 +793,7 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 	int i, ret = 0;
 	bool *enabled;
 
-	DRM_DEBUG_KMS("\n");
+	drm_dbg_kms(dev, "\n");
 
 	if (!width)
 		width = dev->mode_config.max_width;
@@ -813,7 +824,6 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 	offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL);
 	enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
 	if (!crtcs || !modes || !enabled || !offsets) {
-		DRM_ERROR("Memory allocation failed\n");
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -824,7 +834,7 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 	for (i = 0; i < connector_count; i++)
 		total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
 	if (!total_modes_count)
-		DRM_DEBUG_KMS("No connectors reported connected with modes\n");
+		drm_dbg_kms(dev, "No connectors reported connected with modes\n");
 	drm_client_connectors_enabled(connectors, connector_count, enabled);
 
 	if (!drm_client_firmware_config(client, connectors, connector_count, crtcs,
@@ -835,12 +845,12 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 
 		if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
 					      offsets, enabled, width, height) &&
-		    !drm_client_target_preferred(connectors, connector_count, modes,
+		    !drm_client_target_preferred(dev, connectors, connector_count, modes,
 						 offsets, enabled, width, height))
-			DRM_ERROR("Unable to find initial modes\n");
+			drm_err(dev, "Unable to find initial modes\n");
 
-		DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n",
-			      width, height);
+		drm_dbg_kms(dev, "picking CRTCs for %dx%d config\n",
+			    width, height);
 
 		drm_client_pick_crtcs(client, connectors, connector_count,
 				      crtcs, modes, 0, width, height);
@@ -858,11 +868,12 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
 			struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
 			struct drm_connector *connector = connectors[i];
 
-			DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n",
-				      mode->name, crtc->base.id, offset->x, offset->y);
+			drm_dbg_kms(dev, "[CRTC:%d:%s] desired mode %s set (%d,%d)\n",
+				    crtc->base.id, crtc->name,
+				    mode->name, offset->x, offset->y);
 
-			if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
-					 (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
+			if (drm_WARN_ON_ONCE(dev, modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
+					     (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
 				ret = -EINVAL;
 				break;
 			}
-- 
cgit 


From dc73ce5ff20ffbf6d9a61c33b4470571028cf94f Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:24:00 +0300
Subject: drm/crtc: switch to drm device based logging

Prefer drm device based drm_dbg_kms() over DRM_DEBUG_KMS().

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/187a7e8e350569a78ebe02ff83ac3b933c8a5355.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_crtc.c | 36 +++++++++++++++++-------------------
 1 file changed, 17 insertions(+), 19 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 82c665d3e74b..b0a0e27e83eb 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -716,10 +716,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 
 	crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
 	if (!crtc) {
-		DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
+		drm_dbg_kms(dev, "Unknown CRTC ID %d\n", crtc_req->crtc_id);
 		return -ENOENT;
 	}
-	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
+	drm_dbg_kms(dev, "[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 
 	plane = crtc->primary;
 
@@ -742,7 +742,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 				old_fb = plane->fb;
 
 			if (!old_fb) {
-				DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
+				drm_dbg_kms(dev, "CRTC doesn't have current FB\n");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -753,8 +753,8 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 		} else {
 			fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
 			if (!fb) {
-				DRM_DEBUG_KMS("Unknown FB ID%d\n",
-						crtc_req->fb_id);
+				drm_dbg_kms(dev, "Unknown FB ID%d\n",
+					    crtc_req->fb_id);
 				ret = -ENOENT;
 				goto out;
 			}
@@ -767,7 +767,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 		}
 		if (!file_priv->aspect_ratio_allowed &&
 		    (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
-			DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
+			drm_dbg_kms(dev, "Unexpected aspect-ratio flag bits\n");
 			ret = -EINVAL;
 			goto out;
 		}
@@ -775,8 +775,8 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 
 		ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
 		if (ret) {
-			DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
-				      ret, drm_get_mode_status_name(mode->status));
+			drm_dbg_kms(dev, "Invalid mode (ret=%d, status=%s)\n",
+				    ret, drm_get_mode_status_name(mode->status));
 			drm_mode_debug_printmodeline(mode);
 			goto out;
 		}
@@ -793,9 +793,8 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 							   fb->format->format,
 							   fb->modifier);
 			if (ret) {
-				DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
-					      &fb->format->format,
-					      fb->modifier);
+				drm_dbg_kms(dev, "Invalid pixel format %p4cc, modifier 0x%llx\n",
+					    &fb->format->format, fb->modifier);
 				goto out;
 			}
 		}
@@ -808,14 +807,14 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 	}
 
 	if (crtc_req->count_connectors == 0 && mode) {
-		DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
+		drm_dbg_kms(dev, "Count connectors is 0 but mode set\n");
 		ret = -EINVAL;
 		goto out;
 	}
 
 	if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
-		DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
-			  crtc_req->count_connectors);
+		drm_dbg_kms(dev, "Count connectors is %d but no mode or fb set\n",
+			    crtc_req->count_connectors);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -847,14 +846,13 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 
 			connector = drm_connector_lookup(dev, file_priv, out_id);
 			if (!connector) {
-				DRM_DEBUG_KMS("Connector id %d unknown\n",
-						out_id);
+				drm_dbg_kms(dev, "Connector id %d unknown\n",
+					    out_id);
 				ret = -ENOENT;
 				goto out;
 			}
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
-					connector->base.id,
-					connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s]\n",
+				    connector->base.id, connector->name);
 
 			connector_set[i] = connector;
 			num_connectors++;
-- 
cgit 


From fad8e25192c0b01d436aae38df6e664ab78da688 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:24:01 +0300
Subject: drm/crtc-helper: switch to drm device based logging and warns
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Prefer drm device based drm_dbg_kms(), drm_err(), drm_WARN_ON() over
DRM_DEBUG_KMS(), DRM_ERROR(), and WARN_ON(). Also update encoder,
connector, and crtc logging to include the object id and name, where
possible.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/b8557c4b2db0e5c931a6d82b5cc8ac5f3a3e1a77.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_crtc_helper.c | 95 +++++++++++++++++++++------------------
 1 file changed, 52 insertions(+), 43 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 2dafc39a27cb..af7ac9d9192a 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -110,15 +110,15 @@ bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
 	struct drm_connector_list_iter conn_iter;
 	struct drm_device *dev = encoder->dev;
 
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	/*
 	 * We can expect this mutex to be locked if we are not panicking.
 	 * Locking is currently fubar in the panic handler.
 	 */
 	if (!oops_in_progress) {
-		WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
-		WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
+		drm_WARN_ON(dev, !mutex_is_locked(&dev->mode_config.mutex));
+		drm_WARN_ON(dev, !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 	}
 
 
@@ -150,14 +150,14 @@ bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
 	struct drm_encoder *encoder;
 	struct drm_device *dev = crtc->dev;
 
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	/*
 	 * We can expect this mutex to be locked if we are not panicking.
 	 * Locking is currently fubar in the panic handler.
 	 */
 	if (!oops_in_progress)
-		WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
+		drm_WARN_ON(dev, !mutex_is_locked(&dev->mode_config.mutex));
 
 	drm_for_each_encoder(encoder, dev)
 		if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
@@ -230,7 +230,7 @@ static void __drm_helper_disable_unused_functions(struct drm_device *dev)
  */
 void drm_helper_disable_unused_functions(struct drm_device *dev)
 {
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	drm_modeset_lock_all(dev);
 	__drm_helper_disable_unused_functions(dev);
@@ -294,7 +294,7 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 	struct drm_encoder *encoder;
 	bool ret = true;
 
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	drm_warn_on_modeset_not_all_locked(dev);
 
@@ -338,7 +338,8 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 		if (encoder_funcs->mode_fixup) {
 			if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
 							      adjusted_mode))) {
-				DRM_DEBUG_KMS("Encoder fixup failed\n");
+				drm_dbg_kms(dev, "[ENCODER:%d:%s] mode fixup failed\n",
+					    encoder->base.id, encoder->name);
 				goto done;
 			}
 		}
@@ -347,11 +348,12 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 	if (crtc_funcs->mode_fixup) {
 		if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
 						adjusted_mode))) {
-			DRM_DEBUG_KMS("CRTC fixup failed\n");
+			drm_dbg_kms(dev, "[CRTC:%d:%s] mode fixup failed\n",
+				    crtc->base.id, crtc->name);
 			goto done;
 		}
 	}
-	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
+	drm_dbg_kms(dev, "[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 
 	drm_mode_copy(&crtc->hwmode, adjusted_mode);
 
@@ -390,8 +392,8 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 		if (!encoder_funcs)
 			continue;
 
-		DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%s]\n",
-			encoder->base.id, encoder->name, mode->name);
+		drm_dbg_kms(dev, "[ENCODER:%d:%s] set [MODE:%s]\n",
+			    encoder->base.id, encoder->name, mode->name);
 		if (encoder_funcs->mode_set)
 			encoder_funcs->mode_set(encoder, mode, adjusted_mode);
 	}
@@ -503,7 +505,7 @@ drm_connector_get_single_encoder(struct drm_connector *connector)
 {
 	struct drm_encoder *encoder;
 
-	WARN_ON(hweight32(connector->possible_encoders) > 1);
+	drm_WARN_ON(connector->dev, hweight32(connector->possible_encoders) > 1);
 	drm_connector_for_each_possible_encoder(connector, encoder)
 		return encoder;
 
@@ -564,8 +566,6 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 	int ret;
 	int i;
 
-	DRM_DEBUG_KMS("\n");
-
 	BUG_ON(!set);
 	BUG_ON(!set->crtc);
 	BUG_ON(!set->crtc->helper_private);
@@ -577,19 +577,22 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 	crtc_funcs = set->crtc->helper_private;
 
 	dev = set->crtc->dev;
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+
+	drm_dbg_kms(dev, "\n");
+
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	if (!set->mode)
 		set->fb = NULL;
 
 	if (set->fb) {
-		DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
-			      set->crtc->base.id, set->crtc->name,
-			      set->fb->base.id,
-			      (int)set->num_connectors, set->x, set->y);
+		drm_dbg_kms(dev, "[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
+			    set->crtc->base.id, set->crtc->name,
+			    set->fb->base.id,
+			    (int)set->num_connectors, set->x, set->y);
 	} else {
-		DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
-			      set->crtc->base.id, set->crtc->name);
+		drm_dbg_kms(dev, "[CRTC:%d:%s] [NOFB]\n",
+			    set->crtc->base.id, set->crtc->name);
 		drm_crtc_helper_disable(set->crtc);
 		return 0;
 	}
@@ -639,7 +642,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 	if (set->crtc->primary->fb != set->fb) {
 		/* If we have no fb then treat it as a full mode set */
 		if (set->crtc->primary->fb == NULL) {
-			DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
+			drm_dbg_kms(dev, "[CRTC:%d:%s] no fb, full mode set\n",
+				    set->crtc->base.id, set->crtc->name);
 			mode_changed = true;
 		} else if (set->fb->format != set->crtc->primary->fb->format) {
 			mode_changed = true;
@@ -651,7 +655,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 		fb_changed = true;
 
 	if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
-		DRM_DEBUG_KMS("modes are different, full mode set\n");
+		drm_dbg_kms(dev, "[CRTC:%d:%s] modes are different, full mode set:\n",
+			    set->crtc->base.id, set->crtc->name);
 		drm_mode_debug_printmodeline(&set->crtc->mode);
 		drm_mode_debug_printmodeline(set->mode);
 		mode_changed = true;
@@ -687,7 +692,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 					fail = 1;
 
 				if (connector->dpms != DRM_MODE_DPMS_ON) {
-					DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
+					drm_dbg_kms(dev, "[CONNECTOR:%d:%s] DPMS not on, full mode switch\n",
+						    connector->base.id, connector->name);
 					mode_changed = true;
 				}
 
@@ -696,7 +702,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 		}
 
 		if (new_encoder != connector->encoder) {
-			DRM_DEBUG_KMS("encoder changed, full mode switch\n");
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] encoder changed, full mode switch\n",
+				    connector->base.id, connector->name);
 			mode_changed = true;
 			/* If the encoder is reused for another connector, then
 			 * the appropriate crtc will be set later.
@@ -737,17 +744,18 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 			goto fail;
 		}
 		if (new_crtc != connector->encoder->crtc) {
-			DRM_DEBUG_KMS("crtc changed, full mode switch\n");
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] CRTC changed, full mode switch\n",
+				    connector->base.id, connector->name);
 			mode_changed = true;
 			connector->encoder->crtc = new_crtc;
 		}
 		if (new_crtc) {
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
-				      connector->base.id, connector->name,
-				      new_crtc->base.id, new_crtc->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
+				    connector->base.id, connector->name,
+				    new_crtc->base.id, new_crtc->name);
 		} else {
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
-				      connector->base.id, connector->name);
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] to [NOCRTC]\n",
+				    connector->base.id, connector->name);
 		}
 	}
 	drm_connector_list_iter_end(&conn_iter);
@@ -758,23 +766,24 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 
 	if (mode_changed) {
 		if (drm_helper_crtc_in_use(set->crtc)) {
-			DRM_DEBUG_KMS("attempting to set mode from"
-					" userspace\n");
+			drm_dbg_kms(dev, "[CRTC:%d:%s] attempting to set mode from userspace\n",
+				    set->crtc->base.id, set->crtc->name);
 			drm_mode_debug_printmodeline(set->mode);
 			set->crtc->primary->fb = set->fb;
 			if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
 						      set->x, set->y,
 						      save_set.fb)) {
-				DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
-					  set->crtc->base.id, set->crtc->name);
+				drm_err(dev, "[CRTC:%d:%s] failed to set mode\n",
+					set->crtc->base.id, set->crtc->name);
 				set->crtc->primary->fb = save_set.fb;
 				ret = -EINVAL;
 				goto fail;
 			}
-			DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
+			drm_dbg_kms(dev, "[CRTC:%d:%s] Setting connector DPMS state to on\n",
+				    set->crtc->base.id, set->crtc->name);
 			for (i = 0; i < set->num_connectors; i++) {
-				DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
-					      set->connectors[i]->name);
+				drm_dbg_kms(dev, "\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
+					    set->connectors[i]->name);
 				set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
 			}
 		}
@@ -823,7 +832,7 @@ fail:
 	if (mode_changed &&
 	    !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
 				      save_set.y, save_set.fb))
-		DRM_ERROR("failed to restore config after modeset failure\n");
+		drm_err(dev, "failed to restore config after modeset failure\n");
 
 	kfree(save_connector_encoders);
 	kfree(save_encoder_crtcs);
@@ -905,7 +914,7 @@ int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
 	struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 	int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
 
-	WARN_ON(drm_drv_uses_atomic_modeset(connector->dev));
+	drm_WARN_ON(connector->dev, drm_drv_uses_atomic_modeset(connector->dev));
 
 	if (mode == connector->dpms)
 		return 0;
@@ -980,7 +989,7 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
 	int encoder_dpms;
 	bool ret;
 
-	WARN_ON(drm_drv_uses_atomic_modeset(dev));
+	drm_WARN_ON(dev, drm_drv_uses_atomic_modeset(dev));
 
 	drm_modeset_lock_all(dev);
 	drm_for_each_crtc(crtc, dev) {
@@ -993,7 +1002,7 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
 
 		/* Restoring the old config should never fail! */
 		if (ret == false)
-			DRM_ERROR("failed to set mode on crtc %p\n", crtc);
+			drm_err(dev, "failed to set mode on crtc %p\n", crtc);
 
 		/* Turn off outputs that were already powered off */
 		if (drm_helper_choose_crtc_dpms(crtc)) {
-- 
cgit 


From 96a91515465491290497dd6c862323fd94dfd20d Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 8 Apr 2024 12:24:02 +0300
Subject: drm: prefer DRM_MODE_FMT/ARG over drm_mode_debug_printmodeline()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

We have DRM_MODE_FMT and DRM_MODE_ARG() macros to allow unified debug
printing of modes in any printk-formatted logging. Prefer them over
drm_mode_debug_printmodeline().

This allows drm device specific logging of modes, in the right drm debug
category, and inline with the rest of the logging instead of split to
multiple lines.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/6df18588dfa17c5d0a1501f5af9ff21f25a1981b.1712568037.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c  |  6 +++---
 drivers/gpu/drm/drm_crtc.c         |  6 +++---
 drivers/gpu/drm/drm_crtc_helper.c  |  9 ++++-----
 drivers/gpu/drm/drm_modes.c        | 13 +++++--------
 drivers/gpu/drm/drm_probe_helper.c |  3 ++-
 5 files changed, 17 insertions(+), 20 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 29d4940188d4..fc16fddee5c5 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -145,10 +145,10 @@ int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
 					     &state->mode, blob->data);
 		if (ret) {
 			drm_dbg_atomic(crtc->dev,
-				       "[CRTC:%d:%s] invalid mode (ret=%d, status=%s):\n",
+				       "[CRTC:%d:%s] invalid mode (%s, %pe): " DRM_MODE_FMT "\n",
 				       crtc->base.id, crtc->name,
-				       ret, drm_get_mode_status_name(state->mode.status));
-			drm_mode_debug_printmodeline(&state->mode);
+				       drm_get_mode_status_name(state->mode.status),
+				       ERR_PTR(ret), DRM_MODE_ARG(&state->mode));
 			return -EINVAL;
 		}
 
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index b0a0e27e83eb..483969b84a30 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -775,9 +775,9 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 
 		ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
 		if (ret) {
-			drm_dbg_kms(dev, "Invalid mode (ret=%d, status=%s)\n",
-				    ret, drm_get_mode_status_name(mode->status));
-			drm_mode_debug_printmodeline(mode);
+			drm_dbg_kms(dev, "Invalid mode (%s, %pe): " DRM_MODE_FMT "\n",
+				    drm_get_mode_status_name(mode->status),
+				    ERR_PTR(ret), DRM_MODE_ARG(mode));
 			goto out;
 		}
 
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index af7ac9d9192a..0955f1c385dd 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -657,8 +657,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 	if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
 		drm_dbg_kms(dev, "[CRTC:%d:%s] modes are different, full mode set:\n",
 			    set->crtc->base.id, set->crtc->name);
-		drm_mode_debug_printmodeline(&set->crtc->mode);
-		drm_mode_debug_printmodeline(set->mode);
+		drm_dbg_kms(dev, DRM_MODE_FMT "\n", DRM_MODE_ARG(&set->crtc->mode));
+		drm_dbg_kms(dev, DRM_MODE_FMT "\n", DRM_MODE_ARG(set->mode));
 		mode_changed = true;
 	}
 
@@ -766,9 +766,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set,
 
 	if (mode_changed) {
 		if (drm_helper_crtc_in_use(set->crtc)) {
-			drm_dbg_kms(dev, "[CRTC:%d:%s] attempting to set mode from userspace\n",
-				    set->crtc->base.id, set->crtc->name);
-			drm_mode_debug_printmodeline(set->mode);
+			drm_dbg_kms(dev, "[CRTC:%d:%s] attempting to set mode from userspace: " DRM_MODE_FMT "\n",
+				    set->crtc->base.id, set->crtc->name, DRM_MODE_ARG(set->mode));
 			set->crtc->primary->fb = set->fb;
 			if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
 						      set->x, set->y,
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 408ee1b5e44d..2d8b0371619d 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1201,9 +1201,8 @@ int of_get_drm_display_mode(struct device_node *np,
 	if (bus_flags)
 		drm_bus_flags_from_videomode(&vm, bus_flags);
 
-	pr_debug("%pOF: got %dx%d display mode\n",
-		np, vm.hactive, vm.vactive);
-	drm_mode_debug_printmodeline(dmode);
+	pr_debug("%pOF: got %dx%d display mode: " DRM_MODE_FMT "\n",
+		 np, vm.hactive, vm.vactive, DRM_MODE_ARG(dmode));
 
 	return 0;
 }
@@ -1251,7 +1250,7 @@ int of_get_drm_panel_display_mode(struct device_node *np,
 	dmode->width_mm = width_mm;
 	dmode->height_mm = height_mm;
 
-	drm_mode_debug_printmodeline(dmode);
+	pr_debug(DRM_MODE_FMT "\n", DRM_MODE_ARG(dmode));
 
 	return 0;
 }
@@ -1813,10 +1812,8 @@ void drm_mode_prune_invalid(struct drm_device *dev,
 					 DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
 			}
 			if (verbose) {
-				drm_mode_debug_printmodeline(mode);
-				drm_dbg_kms(dev, "Not using %s mode: %s\n",
-					    mode->name,
-					    drm_get_mode_status_name(mode->status));
+				drm_dbg_kms(dev, "Rejected mode: " DRM_MODE_FMT " (%s)\n",
+					    DRM_MODE_ARG(mode), drm_get_mode_status_name(mode->status));
 			}
 			drm_mode_destroy(dev, mode);
 		}
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 19bf5d298257..4f75a1cfd820 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -701,7 +701,8 @@ exit:
 
 	list_for_each_entry(mode, &connector->modes, head) {
 		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
-		drm_mode_debug_printmodeline(mode);
+		drm_dbg_kms(dev, "Probed mode: " DRM_MODE_FMT "\n",
+			    DRM_MODE_ARG(mode));
 	}
 
 	return count;
-- 
cgit 


From e2a1cda3e0c784740751d46431973dcee32cf108 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue, 9 Apr 2024 18:30:40 +0200
Subject: drm/panic: Add drm panic locking

Rough sketch for the locking of drm panic printing code. The upshot of
this approach is that we can pretty much entirely rely on the atomic
commit flow, with the pair of raw_spin_lock/unlock providing any
barriers we need, without having to create really big critical
sections in code.

This also avoids the need that drivers must explicitly update the
panic handler state, which they might forget to do, or not do
consistently, and then we blow up in the worst possible times.

It is somewhat racy against a concurrent atomic update, and we might
write into a buffer which the hardware will never display. But there's
fundamentally no way to avoid that - if we do the panic state update
explicitly after writing to the hardware, we might instead write to an
old buffer that the user will barely ever see.

Note that an rcu protected deference of plane->state would give us the
the same guarantees, but it has the downside that we then need to
protect the plane state freeing functions with call_rcu too. Which
would very widely impact a lot of code and therefore doesn't seem
worth the complexity compared to a raw spinlock with very tiny
critical sections. Plus rcu cannot be used to protect access to
peek/poke registers anyway, so we'd still need it for those cases.

Peek/poke registers for vram access (or a gart pte reserved just for
panic code) are also the reason I've gone with a per-device and not
per-plane spinlock, since usually these things are global for the
entire display. Going with per-plane locks would mean drivers for such
hardware would need additional locks, which we don't want, since it
deviates from the per-console takeoverlocks design.

Longer term it might be useful if the panic notifiers grow a bit more
structure than just the absolute bare
EXPORT_SYMBOL(panic_notifier_list) - somewhat aside, why is that not
EXPORT_SYMBOL_GPL ... If panic notifiers would be more like console
drivers with proper register/unregister interfaces we could perhaps
reuse the very fancy console lock with all it's check and takeover
semantics that John Ogness is developing to fix the console_lock mess.
But for the initial cut of a drm panic printing support I don't think
we need that, because the critical sections are extremely small and
only happen once per display refresh. So generally just 60 tiny locked
sections per second, which is nothing compared to a serial console
running a 115kbaud doing really slow mmio writes for each byte. So for
now the raw spintrylock in drm panic notifier callback should be good
enough.

Another benefit of making panic notifiers more like full blown
consoles (that are used in panics only) would be that we get the two
stage design, where first all the safe outputs are used. And then the
dangerous takeover tricks are deployed (where for display drivers we
also might try to intercept any in-flight display buffer flips, which
if we race and misprogram fifos and watermarks can hang the memory
controller on some hw).

For context the actual implementation on the drm side is by Jocelyn
and this patch is meant to be combined with the overall approach in
v7 (v8 is a bit less flexible, which I think is the wrong direction):

https://lore.kernel.org/dri-devel/20240104160301.185915-1-jfalempe@redhat.com/

Note that the locking is very much not correct there, hence this
separate rfc.

Starting from v10, I (Jocelyn) have included this patch in the drm_panic
series, and done the corresponding changes.

v2:
- fix authorship, this was all my typing
- some typo oopsies
- link to the drm panic work by Jocelyn for context

v10:
- Use spinlock_irqsave/restore (John Ogness)

v11:
- Use macro instead of inline functions for drm_panic_lock/unlock (John Ogness)

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-2-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_atomic_helper.c | 4 ++++
 drivers/gpu/drm/drm_drv.c           | 1 +
 2 files changed, 5 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 39ef0a6addeb..fb97b51b38f1 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -38,6 +38,7 @@
 #include <drm/drm_drv.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_print.h>
 #include <drm/drm_self_refresh_helper.h>
 #include <drm/drm_vblank.h>
@@ -3016,6 +3017,7 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
 				  bool stall)
 {
 	int i, ret;
+	unsigned long flags;
 	struct drm_connector *connector;
 	struct drm_connector_state *old_conn_state, *new_conn_state;
 	struct drm_crtc *crtc;
@@ -3099,6 +3101,7 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
 		}
 	}
 
+	drm_panic_lock(state->dev, flags);
 	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
 		WARN_ON(plane->state != old_plane_state);
 
@@ -3108,6 +3111,7 @@ int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
 		state->planes[i].state = old_plane_state;
 		plane->state = new_plane_state;
 	}
+	drm_panic_unlock(state->dev, flags);
 
 	for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) {
 		WARN_ON(obj->state != old_obj_state);
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 243cacb3575c..c157500b3135 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -638,6 +638,7 @@ static int drm_dev_init(struct drm_device *dev,
 	mutex_init(&dev->filelist_mutex);
 	mutex_init(&dev->clientlist_mutex);
 	mutex_init(&dev->master_mutex);
+	raw_spin_lock_init(&dev->mode_config.panic_lock);
 
 	ret = drmm_add_action_or_reset(dev, drm_dev_init_release, NULL);
 	if (ret)
-- 
cgit 


From bf9fb17c6672868d95126321762c8fdfe0ff0a2a Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:41 +0200
Subject: drm/panic: Add a drm panic handler

This module displays a user friendly message when a kernel panic
occurs. It currently doesn't contain any debug information,
but that can be added later.

v2
 * Use get_scanout_buffer() instead of the drm client API.
  (Thomas Zimmermann)
 * Add the panic reason to the panic message (Nerdopolis)
 * Add an exclamation mark (Nerdopolis)

v3
 * Rework the drawing functions, to write the pixels line by line and
 to use the drm conversion helper to support other formats.
 (Thomas Zimmermann)

v4
 * Use drm_fb_r1_to_32bit for fonts (Thomas Zimmermann)
 * Remove the default y to DRM_PANIC config option (Thomas Zimmermann)
 * Add foreground/background color config option
 * Fix the bottom lines not painted if the framebuffer height
   is not a multiple of the font height.
 * Automatically register the device to drm_panic, if the function
   get_scanout_buffer exists. (Thomas Zimmermann)

v5
 * Change the drawing API, use drm_fb_blit_from_r1() to draw the font.
 * Also add drm_fb_fill() to fill area with background color.
 * Add draw_pixel_xy() API for drivers that can't provide a linear buffer.
 * Add a flush() callback for drivers that needs to synchronize the buffer.
 * Add a void *private field, so drivers can pass private data to
   draw_pixel_xy() and flush().

v6
 * Fix sparse warning for panic_msg and logo.

v7
 * Add select DRM_KMS_HELPER for the color conversion functions.

v8
 * Register directly each plane to the panic notifier (Sima)
 * Add raw_spinlock to properly handle concurrency (Sima)
 * Register plane instead of device, to avoid looping through plane
   list, and simplify code.
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()
  (Thomas Zimmermann)
 * Removed the draw_pixel_xy() API, will see later if it can be added back.

v9
 * Revert to using get_scanout_buffer() (Sima)
 * Move get_scanout_buffer() and panic_flush() to the plane helper
   functions (Thomas Zimmermann)
 * Register all planes with get_scanout_buffer() to the panic notifier
 * Use drm_panic_lock() to protect against race (Sima)

v10
 * Move blit and fill functions back in drm_panic (Thomas Zimmermann).
 * Simplify the text drawing functions.
 * Use kmsg_dumper instead of panic_notifier (Sima).

v12
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)
 * Better indent struct drm_scanout_buffer declaration. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-3-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/Kconfig     |  23 ++++
 drivers/gpu/drm/Makefile    |   1 +
 drivers/gpu/drm/drm_drv.c   |   4 +
 drivers/gpu/drm/drm_panic.c | 290 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 318 insertions(+)
 create mode 100644 drivers/gpu/drm/drm_panic.c

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 3914aaf443a8..f8a26423369e 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -104,6 +104,29 @@ config DRM_KMS_HELPER
 	help
 	  CRTC helpers for KMS drivers.
 
+config DRM_PANIC
+	bool "Display a user-friendly message when a kernel panic occurs"
+	depends on DRM && !FRAMEBUFFER_CONSOLE
+	select DRM_KMS_HELPER
+	select FONT_SUPPORT
+	help
+	  Enable a drm panic handler, which will display a user-friendly message
+	  when a kernel panic occurs. It's useful when using a user-space
+	  console instead of fbcon.
+	  It will only work if your graphic driver supports this feature.
+	  To support Hi-DPI Display, you can enable bigger fonts like
+	  FONT_TER16x32
+
+config DRM_PANIC_FOREGROUND_COLOR
+	hex "Drm panic screen foreground color, in RGB"
+	depends on DRM_PANIC
+	default 0xffffff
+
+config DRM_PANIC_BACKGROUND_COLOR
+	hex "Drm panic screen background color, in RGB"
+	depends on DRM_PANIC
+	default 0x000000
+
 config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
         bool "Enable refcount backtrace history in the DP MST helpers"
 	depends on STACKTRACE_SUPPORT
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index a73c04d2d7a3..f9ca4f8fa6c5 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -88,6 +88,7 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) += \
 	drm_privacy_screen.o \
 	drm_privacy_screen_x86.o
 drm-$(CONFIG_DRM_ACCEL) += ../../accel/drm_accel.o
+drm-$(CONFIG_DRM_PANIC) += drm_panic.o
 obj-$(CONFIG_DRM)	+= drm.o
 
 obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index c157500b3135..535b624d4c9d 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -43,6 +43,7 @@
 #include <drm/drm_file.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_mode_object.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_print.h>
 #include <drm/drm_privacy_screen_machine.h>
 
@@ -944,6 +945,7 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
 		if (ret)
 			goto err_unload;
 	}
+	drm_panic_register(dev);
 
 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
 		 driver->name, driver->major, driver->minor,
@@ -988,6 +990,8 @@ void drm_dev_unregister(struct drm_device *dev)
 {
 	dev->registered = false;
 
+	drm_panic_unregister(dev);
+
 	drm_client_dev_unregister(dev);
 
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
new file mode 100644
index 000000000000..7c81b3d73239
--- /dev/null
+++ b/drivers/gpu/drm/drm_panic.c
@@ -0,0 +1,290 @@
+// SPDX-License-Identifier: GPL-2.0 or MIT
+/*
+ * Copyright (c) 2023 Red Hat.
+ * Author: Jocelyn Falempe <jfalempe@redhat.com>
+ * inspired by the drm_log driver from David Herrmann <dh.herrmann@gmail.com>
+ * Tux Ascii art taken from cowsay written by Tony Monroe
+ */
+
+#include <linux/font.h>
+#include <linux/iosys-map.h>
+#include <linux/kdebug.h>
+#include <linux/kmsg_dump.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_panic.h>
+#include <drm/drm_plane.h>
+#include <drm/drm_print.h>
+
+MODULE_AUTHOR("Jocelyn Falempe");
+MODULE_DESCRIPTION("DRM panic handler");
+MODULE_LICENSE("GPL");
+
+/**
+ * DOC: overview
+ *
+ * To enable DRM panic for a driver, the primary plane must implement a
+ * &drm_plane_helper_funcs.get_scanout_buffer helper function. It is then
+ * automatically registered to the drm panic handler.
+ * When a panic occurs, the &drm_plane_helper_funcs.get_scanout_buffer will be
+ * called, and the driver can provide a framebuffer so the panic handler can
+ * draw the panic screen on it. Currently only linear buffer and a few color
+ * formats are supported.
+ * Optionally the driver can also provide a &drm_plane_helper_funcs.panic_flush
+ * callback, that will be called after that, to send additional commands to the
+ * hardware to make the scanout buffer visible.
+ */
+
+/*
+ * This module displays a user friendly message on screen when a kernel panic
+ * occurs. This is conflicting with fbcon, so you can only enable it when fbcon
+ * is disabled.
+ * It's intended for end-user, so have minimal technical/debug information.
+ *
+ * Implementation details:
+ *
+ * It is a panic handler, so it can't take lock, allocate memory, run tasks/irq,
+ * or attempt to sleep. It's a best effort, and it may not be able to display
+ * the message in all situations (like if the panic occurs in the middle of a
+ * modesetting).
+ * It will display only one static frame, so performance optimizations are low
+ * priority as the machine is already in an unusable state.
+ */
+
+struct drm_panic_line {
+	u32 len;
+	const char *txt;
+};
+
+#define PANIC_LINE(s) {.len = sizeof(s) - 1, .txt = s}
+
+static struct drm_panic_line panic_msg[] = {
+	PANIC_LINE("KERNEL PANIC !"),
+	PANIC_LINE(""),
+	PANIC_LINE("Please reboot your computer."),
+};
+
+static const struct drm_panic_line logo[] = {
+	PANIC_LINE("     .--.        _"),
+	PANIC_LINE("    |o_o |      | |"),
+	PANIC_LINE("    |:_/ |      | |"),
+	PANIC_LINE("   //   \\ \\     |_|"),
+	PANIC_LINE("  (|     | )     _"),
+	PANIC_LINE(" /'\\_   _/`\\    (_)"),
+	PANIC_LINE(" \\___)=(___/"),
+};
+
+static void drm_panic_fill32(struct iosys_map *map, unsigned int pitch,
+			     unsigned int height, unsigned int width,
+			     u32 color)
+{
+	unsigned int y, x;
+
+	for (y = 0; y < height; y++)
+		for (x = 0; x < width; x++)
+			iosys_map_wr(map, y * pitch + x * sizeof(u32), u32, color);
+}
+
+static void drm_panic_blit32(struct iosys_map *dmap, unsigned int dpitch,
+			     const u8 *sbuf8, unsigned int spitch,
+			     unsigned int height, unsigned int width,
+			     u32 fg32, u32 bg32)
+{
+	unsigned int y, x;
+	u32 val32;
+
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			val32 = (sbuf8[(y * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg32 : bg32;
+			iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, val32);
+		}
+	}
+}
+
+static const u8 *get_char_bitmap(const struct font_desc *font, char c, size_t font_pitch)
+{
+	return font->data + (c * font->height) * font_pitch;
+}
+
+static unsigned int get_max_line_len(const struct drm_panic_line *lines, int len)
+{
+	int i;
+	unsigned int max = 0;
+
+	for (i = 0; i < len; i++)
+		max = max(lines[i].len, max);
+	return max;
+}
+
+/*
+ * Draw a text in a rectangle on a framebuffer. The text is truncated if it overflows the rectangle
+ */
+static void draw_txt_rectangle(struct drm_scanout_buffer *sb,
+			       const struct font_desc *font,
+			       const struct drm_panic_line *msg,
+			       unsigned int msg_lines,
+			       bool centered,
+			       struct drm_rect *clip,
+			       u32 fg_color,
+			       u32 bg_color)
+{
+	int i, j;
+	const u8 *src;
+	size_t font_pitch = DIV_ROUND_UP(font->width, 8);
+	struct iosys_map dst;
+	unsigned int px_width = sb->format->cpp[0];
+	int left = 0;
+
+	msg_lines = min(msg_lines,  drm_rect_height(clip) / font->height);
+	for (i = 0; i < msg_lines; i++) {
+		size_t line_len = min(msg[i].len, drm_rect_width(clip) / font->width);
+
+		if (centered)
+			left = (drm_rect_width(clip) - (line_len * font->width)) / 2;
+
+		dst = sb->map[0];
+		iosys_map_incr(&dst, (clip->y1 + i * font->height) * sb->pitch[0] +
+				     (clip->x1 + left) * px_width);
+		for (j = 0; j < line_len; j++) {
+			src = get_char_bitmap(font, msg[i].txt[j], font_pitch);
+			drm_panic_blit32(&dst, sb->pitch[0], src, font_pitch,
+					 font->height, font->width,
+					 fg_color, bg_color);
+			iosys_map_incr(&dst, font->width * px_width);
+		}
+	}
+}
+
+/*
+ * Draw the panic message at the center of the screen
+ */
+static void draw_panic_static(struct drm_scanout_buffer *sb)
+{
+	size_t msg_lines = ARRAY_SIZE(panic_msg);
+	size_t logo_lines = ARRAY_SIZE(logo);
+	u32 fg_color = CONFIG_DRM_PANIC_FOREGROUND_COLOR;
+	u32 bg_color = CONFIG_DRM_PANIC_BACKGROUND_COLOR;
+	const struct font_desc *font = get_default_font(sb->width, sb->height, NULL, NULL);
+	struct drm_rect r_logo, r_msg;
+
+	if (!font)
+		return;
+
+	r_logo = DRM_RECT_INIT(0, 0,
+			       get_max_line_len(logo, logo_lines) * font->width,
+			       logo_lines * font->height);
+	r_msg = DRM_RECT_INIT(0, 0,
+			      min(get_max_line_len(panic_msg, msg_lines) * font->width, sb->width),
+			      min(msg_lines * font->height, sb->height));
+
+	/* Center the panic message */
+	drm_rect_translate(&r_msg, (sb->width - r_msg.x2) / 2, (sb->height - r_msg.y2) / 2);
+
+	/* Fill with the background color, and draw text on top */
+	drm_panic_fill32(&sb->map[0], sb->pitch[0], sb->height, sb->width, bg_color);
+
+	if ((r_msg.x1 >= drm_rect_width(&r_logo) || r_msg.y1 >= drm_rect_height(&r_logo)) &&
+	    drm_rect_width(&r_logo) < sb->width && drm_rect_height(&r_logo) < sb->height) {
+		draw_txt_rectangle(sb, font, logo, logo_lines, false, &r_logo, fg_color, bg_color);
+	}
+	draw_txt_rectangle(sb, font, panic_msg, msg_lines, true, &r_msg, fg_color, bg_color);
+}
+
+/*
+ * drm_panic_is_format_supported()
+ * @format: a fourcc color code
+ * Returns: true if supported, false otherwise.
+ *
+ * Check if drm_panic will be able to use this color format.
+ */
+static bool drm_panic_is_format_supported(const struct drm_format_info *format)
+{
+	if (format->num_planes != 1)
+		return false;
+	return format->format == DRM_FORMAT_XRGB8888;
+}
+
+static void draw_panic_plane(struct drm_plane *plane)
+{
+	struct drm_scanout_buffer sb;
+	int ret;
+	unsigned long flags;
+
+	if (!drm_panic_trylock(plane->dev, flags))
+		return;
+
+	ret = plane->helper_private->get_scanout_buffer(plane, &sb);
+
+	if (!ret && drm_panic_is_format_supported(sb.format)) {
+		draw_panic_static(&sb);
+		if (plane->helper_private->panic_flush)
+			plane->helper_private->panic_flush(plane);
+	}
+	drm_panic_unlock(plane->dev, flags);
+}
+
+static struct drm_plane *to_drm_plane(struct kmsg_dumper *kd)
+{
+	return container_of(kd, struct drm_plane, kmsg_panic);
+}
+
+static void drm_panic(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason)
+{
+	struct drm_plane *plane = to_drm_plane(dumper);
+
+	if (reason == KMSG_DUMP_PANIC)
+		draw_panic_plane(plane);
+}
+
+/**
+ * drm_panic_register() - Initialize DRM panic for a device
+ * @dev: the drm device on which the panic screen will be displayed.
+ */
+void drm_panic_register(struct drm_device *dev)
+{
+	struct drm_plane *plane;
+	int registered_plane = 0;
+
+	if (!dev->mode_config.num_total_plane)
+		return;
+
+	drm_for_each_plane(plane, dev) {
+		if (!plane->helper_private || !plane->helper_private->get_scanout_buffer)
+			continue;
+		plane->kmsg_panic.dump = drm_panic;
+		plane->kmsg_panic.max_reason = KMSG_DUMP_PANIC;
+		if (kmsg_dump_register(&plane->kmsg_panic))
+			drm_warn(dev, "Failed to register panic handler\n");
+		else
+			registered_plane++;
+	}
+	if (registered_plane)
+		drm_info(dev, "Registered %d planes with drm panic\n", registered_plane);
+}
+EXPORT_SYMBOL(drm_panic_register);
+
+/**
+ * drm_panic_unregister()
+ * @dev: the drm device previously registered.
+ */
+void drm_panic_unregister(struct drm_device *dev)
+{
+	struct drm_plane *plane;
+
+	if (!dev->mode_config.num_total_plane)
+		return;
+
+	drm_for_each_plane(plane, dev) {
+		if (!plane->helper_private || !plane->helper_private->get_scanout_buffer)
+			continue;
+		kmsg_dump_unregister(&plane->kmsg_panic);
+	}
+}
+EXPORT_SYMBOL(drm_panic_unregister);
-- 
cgit 


From 9544309775c334c9cc5f7d88be3daccc846199d1 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:42 +0200
Subject: drm/panic: Add support for color format conversion

Add support for the following formats:
DRM_FORMAT_RGB565
DRM_FORMAT_RGBA5551
DRM_FORMAT_XRGB1555
DRM_FORMAT_ARGB1555
DRM_FORMAT_RGB888
DRM_FORMAT_XRGB8888
DRM_FORMAT_ARGB8888
DRM_FORMAT_XBGR8888
DRM_FORMAT_XRGB2101010
DRM_FORMAT_ARGB2101010

v10:
 * move and simplify the functions from the drm format helper to drm_panic

v12:
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-4-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_panic.c | 273 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 263 insertions(+), 10 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 7c81b3d73239..452cfe08a7c8 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -81,15 +81,155 @@ static const struct drm_panic_line logo[] = {
 	PANIC_LINE(" \\___)=(___/"),
 };
 
-static void drm_panic_fill32(struct iosys_map *map, unsigned int pitch,
+/*
+ * Color conversion
+ */
+
+static u16 convert_xrgb8888_to_rgb565(u32 pix)
+{
+	return ((pix & 0x00F80000) >> 8) |
+	       ((pix & 0x0000FC00) >> 5) |
+	       ((pix & 0x000000F8) >> 3);
+}
+
+static u16 convert_xrgb8888_to_rgba5551(u32 pix)
+{
+	return ((pix & 0x00f80000) >> 8) |
+	       ((pix & 0x0000f800) >> 5) |
+	       ((pix & 0x000000f8) >> 2) |
+	       BIT(0); /* set alpha bit */
+}
+
+static u16 convert_xrgb8888_to_xrgb1555(u32 pix)
+{
+	return ((pix & 0x00f80000) >> 9) |
+	       ((pix & 0x0000f800) >> 6) |
+	       ((pix & 0x000000f8) >> 3);
+}
+
+static u16 convert_xrgb8888_to_argb1555(u32 pix)
+{
+	return BIT(15) | /* set alpha bit */
+	       ((pix & 0x00f80000) >> 9) |
+	       ((pix & 0x0000f800) >> 6) |
+	       ((pix & 0x000000f8) >> 3);
+}
+
+static u32 convert_xrgb8888_to_argb8888(u32 pix)
+{
+	return pix | GENMASK(31, 24); /* fill alpha bits */
+}
+
+static u32 convert_xrgb8888_to_xbgr8888(u32 pix)
+{
+	return ((pix & 0x00ff0000) >> 16) <<  0 |
+	       ((pix & 0x0000ff00) >>  8) <<  8 |
+	       ((pix & 0x000000ff) >>  0) << 16 |
+	       ((pix & 0xff000000) >> 24) << 24;
+}
+
+static u32 convert_xrgb8888_to_abgr8888(u32 pix)
+{
+	return ((pix & 0x00ff0000) >> 16) <<  0 |
+	       ((pix & 0x0000ff00) >>  8) <<  8 |
+	       ((pix & 0x000000ff) >>  0) << 16 |
+	       GENMASK(31, 24); /* fill alpha bits */
+}
+
+static u32 convert_xrgb8888_to_xrgb2101010(u32 pix)
+{
+	pix = ((pix & 0x000000FF) << 2) |
+	      ((pix & 0x0000FF00) << 4) |
+	      ((pix & 0x00FF0000) << 6);
+	return pix | ((pix >> 8) & 0x00300C03);
+}
+
+static u32 convert_xrgb8888_to_argb2101010(u32 pix)
+{
+	pix = ((pix & 0x000000FF) << 2) |
+	      ((pix & 0x0000FF00) << 4) |
+	      ((pix & 0x00FF0000) << 6);
+	return GENMASK(31, 30) /* set alpha bits */ | pix | ((pix >> 8) & 0x00300C03);
+}
+
+/*
+ * convert_from_xrgb8888 - convert one pixel from xrgb8888 to the desired format
+ * @color: input color, in xrgb8888 format
+ * @format: output format
+ *
+ * Returns:
+ * Color in the format specified, casted to u32.
+ * Or 0 if the format is not supported.
+ */
+static u32 convert_from_xrgb8888(u32 color, u32 format)
+{
+	switch (format) {
+	case DRM_FORMAT_RGB565:
+		return convert_xrgb8888_to_rgb565(color);
+	case DRM_FORMAT_RGBA5551:
+		return convert_xrgb8888_to_rgba5551(color);
+	case DRM_FORMAT_XRGB1555:
+		return convert_xrgb8888_to_xrgb1555(color);
+	case DRM_FORMAT_ARGB1555:
+		return convert_xrgb8888_to_argb1555(color);
+	case DRM_FORMAT_RGB888:
+	case DRM_FORMAT_XRGB8888:
+		return color;
+	case DRM_FORMAT_ARGB8888:
+		return convert_xrgb8888_to_argb8888(color);
+	case DRM_FORMAT_XBGR8888:
+		return convert_xrgb8888_to_xbgr8888(color);
+	case DRM_FORMAT_ABGR8888:
+		return convert_xrgb8888_to_abgr8888(color);
+	case DRM_FORMAT_XRGB2101010:
+		return convert_xrgb8888_to_xrgb2101010(color);
+	case DRM_FORMAT_ARGB2101010:
+		return convert_xrgb8888_to_argb2101010(color);
+	default:
+		WARN_ONCE(1, "Can't convert to %p4cc\n", &format);
+		return 0;
+	}
+}
+
+/*
+ * Blit & Fill
+ */
+static void drm_panic_blit16(struct iosys_map *dmap, unsigned int dpitch,
+			     const u8 *sbuf8, unsigned int spitch,
 			     unsigned int height, unsigned int width,
-			     u32 color)
+			     u16 fg16, u16 bg16)
 {
 	unsigned int y, x;
+	u16 val16;
 
-	for (y = 0; y < height; y++)
-		for (x = 0; x < width; x++)
-			iosys_map_wr(map, y * pitch + x * sizeof(u32), u32, color);
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			val16 = (sbuf8[(y * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg16 : bg16;
+			iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, val16);
+		}
+	}
+}
+
+static void drm_panic_blit24(struct iosys_map *dmap, unsigned int dpitch,
+			     const u8 *sbuf8, unsigned int spitch,
+			     unsigned int height, unsigned int width,
+			     u32 fg32, u32 bg32)
+{
+	unsigned int y, x;
+	u32 val32;
+
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			u32 off = y * dpitch + x * 3;
+
+			val32 = (sbuf8[(y * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg32 : bg32;
+
+			/* write blue-green-red to output in little endianness */
+			iosys_map_wr(dmap, off, u8, (val32 & 0x000000FF) >> 0);
+			iosys_map_wr(dmap, off + 1, u8, (val32 & 0x0000FF00) >> 8);
+			iosys_map_wr(dmap, off + 2, u8, (val32 & 0x00FF0000) >> 16);
+		}
+	}
 }
 
 static void drm_panic_blit32(struct iosys_map *dmap, unsigned int dpitch,
@@ -108,6 +248,115 @@ static void drm_panic_blit32(struct iosys_map *dmap, unsigned int dpitch,
 	}
 }
 
+/*
+ * drm_panic_blit - convert a monochrome image to a linear framebuffer
+ * @dmap: destination iosys_map
+ * @dpitch: destination pitch in bytes
+ * @sbuf8: source buffer, in monochrome format, 8 pixels per byte.
+ * @spitch: source pitch in bytes
+ * @height: height of the image to copy, in pixels
+ * @width: width of the image to copy, in pixels
+ * @fg_color: foreground color, in destination format
+ * @bg_color: background color, in destination format
+ * @pixel_width: pixel width in bytes.
+ *
+ * This can be used to draw a font character, which is a monochrome image, to a
+ * framebuffer in other supported format.
+ */
+static void drm_panic_blit(struct iosys_map *dmap, unsigned int dpitch,
+			   const u8 *sbuf8, unsigned int spitch,
+			   unsigned int height, unsigned int width,
+			   u32 fg_color, u32 bg_color,
+			   unsigned int pixel_width)
+{
+	switch (pixel_width) {
+	case 2:
+		drm_panic_blit16(dmap, dpitch, sbuf8, spitch,
+				 height, width, fg_color, bg_color);
+	break;
+	case 3:
+		drm_panic_blit24(dmap, dpitch, sbuf8, spitch,
+				 height, width, fg_color, bg_color);
+	break;
+	case 4:
+		drm_panic_blit32(dmap, dpitch, sbuf8, spitch,
+				 height, width, fg_color, bg_color);
+	break;
+	default:
+		WARN_ONCE(1, "Can't blit with pixel width %d\n", pixel_width);
+	}
+}
+
+static void drm_panic_fill16(struct iosys_map *dmap, unsigned int dpitch,
+			     unsigned int height, unsigned int width,
+			     u16 color)
+{
+	unsigned int y, x;
+
+	for (y = 0; y < height; y++)
+		for (x = 0; x < width; x++)
+			iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, color);
+}
+
+static void drm_panic_fill24(struct iosys_map *dmap, unsigned int dpitch,
+			     unsigned int height, unsigned int width,
+			     u32 color)
+{
+	unsigned int y, x;
+
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			unsigned int off = y * dpitch + x * 3;
+
+			/* write blue-green-red to output in little endianness */
+			iosys_map_wr(dmap, off, u8, (color & 0x000000FF) >> 0);
+			iosys_map_wr(dmap, off + 1, u8, (color & 0x0000FF00) >> 8);
+			iosys_map_wr(dmap, off + 2, u8, (color & 0x00FF0000) >> 16);
+		}
+	}
+}
+
+static void drm_panic_fill32(struct iosys_map *dmap, unsigned int dpitch,
+			     unsigned int height, unsigned int width,
+			     u32 color)
+{
+	unsigned int y, x;
+
+	for (y = 0; y < height; y++)
+		for (x = 0; x < width; x++)
+			iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, color);
+}
+
+/*
+ * drm_panic_fill - Fill a rectangle with a color
+ * @dmap: destination iosys_map, pointing to the top left corner of the rectangle
+ * @dpitch: destination pitch in bytes
+ * @height: height of the rectangle, in pixels
+ * @width: width of the rectangle, in pixels
+ * @color: color to fill the rectangle.
+ * @pixel_width: pixel width in bytes
+ *
+ * Fill a rectangle with a color, in a linear framebuffer.
+ */
+static void drm_panic_fill(struct iosys_map *dmap, unsigned int dpitch,
+			   unsigned int height, unsigned int width,
+			   u32 color, unsigned int pixel_width)
+{
+	switch (pixel_width) {
+	case 2:
+		drm_panic_fill16(dmap, dpitch, height, width, color);
+	break;
+	case 3:
+		drm_panic_fill24(dmap, dpitch, height, width, color);
+	break;
+	case 4:
+		drm_panic_fill32(dmap, dpitch, height, width, color);
+	break;
+	default:
+		WARN_ONCE(1, "Can't fill with pixel width %d\n", pixel_width);
+	}
+}
+
 static const u8 *get_char_bitmap(const struct font_desc *font, char c, size_t font_pitch)
 {
 	return font->data + (c * font->height) * font_pitch;
@@ -154,9 +403,9 @@ static void draw_txt_rectangle(struct drm_scanout_buffer *sb,
 				     (clip->x1 + left) * px_width);
 		for (j = 0; j < line_len; j++) {
 			src = get_char_bitmap(font, msg[i].txt[j], font_pitch);
-			drm_panic_blit32(&dst, sb->pitch[0], src, font_pitch,
-					 font->height, font->width,
-					 fg_color, bg_color);
+			drm_panic_blit(&dst, sb->pitch[0], src, font_pitch,
+				       font->height, font->width,
+				       fg_color, bg_color, px_width);
 			iosys_map_incr(&dst, font->width * px_width);
 		}
 	}
@@ -177,6 +426,9 @@ static void draw_panic_static(struct drm_scanout_buffer *sb)
 	if (!font)
 		return;
 
+	fg_color = convert_from_xrgb8888(fg_color, sb->format->format);
+	bg_color = convert_from_xrgb8888(bg_color, sb->format->format);
+
 	r_logo = DRM_RECT_INIT(0, 0,
 			       get_max_line_len(logo, logo_lines) * font->width,
 			       logo_lines * font->height);
@@ -188,7 +440,8 @@ static void draw_panic_static(struct drm_scanout_buffer *sb)
 	drm_rect_translate(&r_msg, (sb->width - r_msg.x2) / 2, (sb->height - r_msg.y2) / 2);
 
 	/* Fill with the background color, and draw text on top */
-	drm_panic_fill32(&sb->map[0], sb->pitch[0], sb->height, sb->width, bg_color);
+	drm_panic_fill(&sb->map[0], sb->pitch[0], sb->height, sb->width,
+		       bg_color, sb->format->cpp[0]);
 
 	if ((r_msg.x1 >= drm_rect_width(&r_logo) || r_msg.y1 >= drm_rect_height(&r_logo)) &&
 	    drm_rect_width(&r_logo) < sb->width && drm_rect_height(&r_logo) < sb->height) {
@@ -208,7 +461,7 @@ static bool drm_panic_is_format_supported(const struct drm_format_info *format)
 {
 	if (format->num_planes != 1)
 		return false;
-	return format->format == DRM_FORMAT_XRGB8888;
+	return convert_from_xrgb8888(0xffffff, format->format) != 0;
 }
 
 static void draw_panic_plane(struct drm_plane *plane)
-- 
cgit 


From 813ca3aa8fecaca9cf81f831d2e036d997ac3ee7 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:43 +0200
Subject: drm/panic: Add debugfs entry to test without triggering panic.

Add a debugfs file, so you can test drm_panic without freezing
your machine. This is unsafe, and should be enabled only for
developer or tester.

To display the drm_panic screen on the device 0:
echo 1 > /sys/kernel/debug/dri/0/drm_panic_plane_0

v9:
 * Create a debugfs file for each plane in the device's debugfs
   directory. This allows to test for each plane of each GPU
   independently.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-5-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/Kconfig     |  9 +++++++++
 drivers/gpu/drm/drm_panic.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index f8a26423369e..959b19a04101 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -127,6 +127,15 @@ config DRM_PANIC_BACKGROUND_COLOR
 	depends on DRM_PANIC
 	default 0x000000
 
+config DRM_PANIC_DEBUG
+	bool "Add a debug fs entry to trigger drm_panic"
+	depends on DRM_PANIC && DEBUG_FS
+	help
+	  Add dri/[device]/drm_panic_plane_x in the kernel debugfs, to force the
+	  panic handler to write the panic message to this plane scanout buffer.
+	  This is unsafe and should not be enabled on a production build.
+	  If in doubt, say "N".
+
 config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
         bool "Enable refcount backtrace history in the DP MST helpers"
 	depends on STACKTRACE_SUPPORT
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 452cfe08a7c8..7ece67086cec 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -496,6 +496,46 @@ static void drm_panic(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason)
 		draw_panic_plane(plane);
 }
 
+
+/*
+ * DEBUG FS, This is currently unsafe.
+ * Create one file per plane, so it's possible to debug one plane at a time.
+ * TODO: It would be better to emulate an NMI context.
+ */
+#ifdef CONFIG_DRM_PANIC_DEBUG
+#include <linux/debugfs.h>
+
+static ssize_t debugfs_trigger_write(struct file *file, const char __user *user_buf,
+				     size_t count, loff_t *ppos)
+{
+	bool run;
+
+	if (kstrtobool_from_user(user_buf, count, &run) == 0 && run) {
+		struct drm_plane *plane = file->private_data;
+
+		draw_panic_plane(plane);
+	}
+	return count;
+}
+
+static const struct file_operations dbg_drm_panic_ops = {
+	.owner = THIS_MODULE,
+	.write = debugfs_trigger_write,
+	.open = simple_open,
+};
+
+static void debugfs_register_plane(struct drm_plane *plane, int index)
+{
+	char fname[32];
+
+	snprintf(fname, 32, "drm_panic_plane_%d", index);
+	debugfs_create_file(fname, 0200, plane->dev->debugfs_root,
+			    plane, &dbg_drm_panic_ops);
+}
+#else
+static void debugfs_register_plane(struct drm_plane *plane, int index) {}
+#endif /* CONFIG_DRM_PANIC_DEBUG */
+
 /**
  * drm_panic_register() - Initialize DRM panic for a device
  * @dev: the drm device on which the panic screen will be displayed.
@@ -515,8 +555,10 @@ void drm_panic_register(struct drm_device *dev)
 		plane->kmsg_panic.max_reason = KMSG_DUMP_PANIC;
 		if (kmsg_dump_register(&plane->kmsg_panic))
 			drm_warn(dev, "Failed to register panic handler\n");
-		else
+		else {
+			debugfs_register_plane(plane, registered_plane);
 			registered_plane++;
+		}
 	}
 	if (registered_plane)
 		drm_info(dev, "Registered %d planes with drm panic\n", registered_plane);
-- 
cgit 


From 879b3b6511fe92b1b93dfc543961347289a8aeaa Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:44 +0200
Subject: drm/fb_dma: Add generic get_scanout_buffer() for drm_panic

This was initialy done for imx6, but should work on most drivers
using drm_fb_dma_helper.

v8:
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()
   (Thomas Zimmermann)

v9:
 * go back to get_scanout_buffer()
 * move get_scanout_buffer() to plane helper functions

v12:
 * Rename drm_panic_gem_get_scanout_buffer to drm_fb_dma_get_scanout_buffer
   (Thomas Zimmermann)
 * Remove the #ifdef CONFIG_DRM_PANIC, and build it unconditionnaly, as
   it's a small function. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-6-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/drm_fb_dma_helper.c | 42 +++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_fb_dma_helper.c b/drivers/gpu/drm/drm_fb_dma_helper.c
index 3b535ad1b07c..c79b5078303f 100644
--- a/drivers/gpu/drm/drm_fb_dma_helper.c
+++ b/drivers/gpu/drm/drm_fb_dma_helper.c
@@ -15,6 +15,7 @@
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_plane.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
@@ -148,3 +149,44 @@ void drm_fb_dma_sync_non_coherent(struct drm_device *drm,
 	}
 }
 EXPORT_SYMBOL_GPL(drm_fb_dma_sync_non_coherent);
+
+/**
+ * drm_fb_dma_get_scanout_buffer - Provide a scanout buffer in case of panic
+ * @plane: DRM primary plane
+ * @drm_scanout_buffer: scanout buffer for the panic handler
+ * Returns: 0 or negative error code
+ *
+ * Generic get_scanout_buffer() implementation, for drivers that uses the
+ * drm_fb_dma_helper. It won't call vmap in the panic context, so the driver
+ * should make sure the primary plane is vmapped, otherwise the panic screen
+ * won't get displayed.
+ */
+int drm_fb_dma_get_scanout_buffer(struct drm_plane *plane,
+				  struct drm_scanout_buffer *sb)
+{
+	struct drm_gem_dma_object *dma_obj;
+	struct drm_framebuffer *fb;
+
+	fb = plane->state->fb;
+	/* Only support linear modifier */
+	if (fb->modifier != DRM_FORMAT_MOD_LINEAR)
+		return -ENODEV;
+
+	dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
+
+	/* Buffer should be accessible from the CPU */
+	if (dma_obj->base.import_attach)
+		return -ENODEV;
+
+	/* Buffer should be already mapped to CPU */
+	if (!dma_obj->vaddr)
+		return -ENODEV;
+
+	iosys_map_set_vaddr(&sb->map[0], dma_obj->vaddr);
+	sb->format = fb->format;
+	sb->height = fb->height;
+	sb->width = fb->width;
+	sb->pitch[0] = fb->pitches[0];
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_dma_get_scanout_buffer);
-- 
cgit 


From 41e54853cae973ce812346d4c2b37a2aa6e02dcf Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:45 +0200
Subject: drm/simpledrm: Add drm_panic support

Add support for the drm_panic module, which displays a user-friendly
message to the screen when a kernel panic occurs.

v8:
 * Replace get_scanout_buffer() with drm_panic_set_buffer()
   (Thomas Zimmermann)

v9:
 * Revert to using get_scanout_buffer() (Sima)
 * move get_scanout_buffer() to plane helper functions (Thomas Zimmermann)

v12:
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-7-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/tiny/simpledrm.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 7ce1c4617675..1d8fa07572c5 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -25,6 +25,7 @@
 #include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_probe_helper.h>
 
 #define DRIVER_NAME	"simpledrm"
@@ -671,11 +672,26 @@ static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plan
 	drm_dev_exit(idx);
 }
 
+static int simpledrm_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+							     struct drm_scanout_buffer *sb)
+{
+	struct simpledrm_device *sdev = simpledrm_device_of_dev(plane->dev);
+
+	sb->width = sdev->mode.hdisplay;
+	sb->height = sdev->mode.vdisplay;
+	sb->format = sdev->format;
+	sb->pitch[0] = sdev->pitch;
+	sb->map[0] = sdev->screen_base;
+
+	return 0;
+}
+
 static const struct drm_plane_helper_funcs simpledrm_primary_plane_helper_funcs = {
 	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
 	.atomic_check = simpledrm_primary_plane_helper_atomic_check,
 	.atomic_update = simpledrm_primary_plane_helper_atomic_update,
 	.atomic_disable = simpledrm_primary_plane_helper_atomic_disable,
+	.get_scanout_buffer = simpledrm_primary_plane_helper_get_scanout_buffer,
 };
 
 static const struct drm_plane_funcs simpledrm_primary_plane_funcs = {
-- 
cgit 


From 7e64f7c83c8e95a548fa63a48032b1d8ea1f93a6 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:46 +0200
Subject: drm/mgag200: Add drm_panic support

Add support for the drm_panic module, which displays a message to
the screen when a kernel panic occurs.

v5:
 * Also check that the plane is visible and primary. (Thomas Zimmermann)

v7:
 * use drm_for_each_primary_visible_plane()

v8:
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()
   (Thomas Zimmermann)

v9:
 * Revert to using get_scanout_buffer() (Sima)
 * move get_scanout_buffer() to plane helper functions (Thomas Zimmermann)

v12:
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-8-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/mgag200/mgag200_drv.h  |  7 ++++++-
 drivers/gpu/drm/mgag200/mgag200_mode.c | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index 765e49fd8911..58a0e62eaf18 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -366,6 +366,7 @@ struct drm_crtc_state;
 struct drm_display_mode;
 struct drm_plane;
 struct drm_atomic_state;
+struct drm_scanout_buffer;
 
 extern const uint32_t mgag200_primary_plane_formats[];
 extern const size_t   mgag200_primary_plane_formats_size;
@@ -379,12 +380,16 @@ void mgag200_primary_plane_helper_atomic_enable(struct drm_plane *plane,
 						struct drm_atomic_state *state);
 void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane,
 						 struct drm_atomic_state *old_state);
+int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+						    struct drm_scanout_buffer *sb);
+
 #define MGAG200_PRIMARY_PLANE_HELPER_FUNCS \
 	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, \
 	.atomic_check = mgag200_primary_plane_helper_atomic_check, \
 	.atomic_update = mgag200_primary_plane_helper_atomic_update, \
 	.atomic_enable = mgag200_primary_plane_helper_atomic_enable, \
-	.atomic_disable = mgag200_primary_plane_helper_atomic_disable
+	.atomic_disable = mgag200_primary_plane_helper_atomic_disable, \
+	.get_scanout_buffer = mgag200_primary_plane_helper_get_scanout_buffer
 
 #define MGAG200_PRIMARY_PLANE_FUNCS \
 	.update_plane = drm_atomic_helper_update_plane, \
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index e17cb4c5f774..fc54851d3384 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -21,6 +21,7 @@
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_print.h>
 
 #include "mgag200_drv.h"
@@ -546,6 +547,23 @@ void mgag200_primary_plane_helper_atomic_disable(struct drm_plane *plane,
 	msleep(20);
 }
 
+int mgag200_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+						    struct drm_scanout_buffer *sb)
+{
+	struct mga_device *mdev = to_mga_device(plane->dev);
+	struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(mdev->vram);
+
+	if (plane->state && plane->state->fb) {
+		sb->format = plane->state->fb->format;
+		sb->width = plane->state->fb->width;
+		sb->height = plane->state->fb->height;
+		sb->pitch[0] = plane->state->fb->pitches[0];
+		sb->map[0] = map;
+		return 0;
+	}
+	return -ENODEV;
+}
+
 /*
  * CRTC
  */
-- 
cgit 


From 99b625194569f2039d8f277c8a09cd18c1438b65 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:47 +0200
Subject: drm/imx: Add drm_panic support

Add support for the drm_panic module, which displays a user-friendly
message to the screen when a kernel panic occurs.

v7:
 * use drm_panic_gem_get_scanout_buffer() helper

v8:
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()

v9:
 * Revert to using get_scanout_buffer() (Sima)
 * move get_scanout_buffer() to plane helper functions

v12:
 * Rename drm_panic_gem_get_scanout_buffer to drm_fb_dma_get_scanout_buffer
 (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-9-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
index dade8b59feae..704c549750f9 100644
--- a/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
@@ -773,6 +773,13 @@ static const struct drm_plane_helper_funcs ipu_plane_helper_funcs = {
 	.atomic_update = ipu_plane_atomic_update,
 };
 
+static const struct drm_plane_helper_funcs ipu_primary_plane_helper_funcs = {
+	.atomic_check = ipu_plane_atomic_check,
+	.atomic_disable = ipu_plane_atomic_disable,
+	.atomic_update = ipu_plane_atomic_update,
+	.get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
+};
+
 bool ipu_plane_atomic_update_pending(struct drm_plane *plane)
 {
 	struct ipu_plane *ipu_plane = to_ipu_plane(plane);
@@ -916,7 +923,10 @@ struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
 	ipu_plane->dma = dma;
 	ipu_plane->dp_flow = dp;
 
-	drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
+	if (type == DRM_PLANE_TYPE_PRIMARY)
+		drm_plane_helper_add(&ipu_plane->base, &ipu_primary_plane_helper_funcs);
+	else
+		drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
 
 	if (dp == IPU_DP_FLOW_SYNC_BG || dp == IPU_DP_FLOW_SYNC_FG)
 		ret = drm_plane_create_zpos_property(&ipu_plane->base, zpos, 0,
-- 
cgit 


From baaf150fa9e775662c2883200b7222fe779f6fca Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 9 Apr 2024 18:30:48 +0200
Subject: drm/ast: Add drm_panic support

Add support for the drm_panic module, which displays a message to
the screen when a kernel panic occurs.

v7
 * Use drm_for_each_primary_visible_plane()

v8:
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()
   (Thomas Zimmermann)
v9:
 * Revert to using get_scanout_buffer() (Sima)
 * move get_scanout_buffer() to plane helper functions

v12:
 * Use array for map and pitch in struct drm_scanout_buffer
   to support multi-planar format later. (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Acked-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Tested-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-10-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/ast/ast_mode.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index ae21d89b899c..6695af70768f 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -43,6 +43,7 @@
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_managed.h>
+#include <drm/drm_panic.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
 
@@ -701,12 +702,29 @@ static void ast_primary_plane_helper_atomic_disable(struct drm_plane *plane,
 	ast_set_index_reg_mask(ast, AST_IO_VGASRI, 0x1, 0xdf, 0x20);
 }
 
+static int ast_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
+						       struct drm_scanout_buffer *sb)
+{
+	struct ast_plane *ast_plane = to_ast_plane(plane);
+
+	if (plane->state && plane->state->fb && ast_plane->vaddr) {
+		sb->format = plane->state->fb->format;
+		sb->width = plane->state->fb->width;
+		sb->height = plane->state->fb->height;
+		sb->pitch[0] = plane->state->fb->pitches[0];
+		iosys_map_set_vaddr_iomem(&sb->map[0], ast_plane->vaddr);
+		return 0;
+	}
+	return -ENODEV;
+}
+
 static const struct drm_plane_helper_funcs ast_primary_plane_helper_funcs = {
 	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
 	.atomic_check = ast_primary_plane_helper_atomic_check,
 	.atomic_update = ast_primary_plane_helper_atomic_update,
 	.atomic_enable = ast_primary_plane_helper_atomic_enable,
 	.atomic_disable = ast_primary_plane_helper_atomic_disable,
+	.get_scanout_buffer = ast_primary_plane_helper_get_scanout_buffer,
 };
 
 static const struct drm_plane_funcs ast_primary_plane_funcs = {
-- 
cgit 


From cd2eb57df1b8bbac90daad622b2f1ef00640c38c Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack.rusin@broadcom.com>
Date: Thu, 11 Apr 2024 22:55:07 -0400
Subject: drm/vmwgfx: Implement virtual kms

By default vmwgfx doesn't support vblanking or crc generation which
makes it impossible to use various IGT tests to validate vmwgfx.
Implement virtual kernel mode setting, which is mainly related to
simulated vblank support.

Code is very similar to amd's vkms and the vkms module itself, except
that it's integrated with vmwgfx three different output technologies -
legacy, screen object and screen targets.

Make IGT's kms_vblank pass on vmwgfx and allows a lot of other IGT
tests to run with vmwgfx.

Support for vkms needs to be manually enabled by adding:
guestinfo.vmwgfx.vkms_enable = "TRUE"
somewhere in the vmx file, otherwise it's off by default.

Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Acked-by: Martin Krastev <martin.krastev@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412025511.78553-2-zack.rusin@broadcom.com
---
 drivers/gpu/drm/vmwgfx/Makefile      |   2 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c  |   3 +
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.h  |   2 +
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c  |  15 +--
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.h  |   9 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c  |  39 ++-----
 drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c |  28 +++--
 drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c |  22 ++--
 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c | 193 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h |  53 ++++++++++
 10 files changed, 302 insertions(+), 64 deletions(-)
 create mode 100644 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
 create mode 100644 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile
index e94479d9cd5b..46a4ab688a7f 100644
--- a/drivers/gpu/drm/vmwgfx/Makefile
+++ b/drivers/gpu/drm/vmwgfx/Makefile
@@ -10,6 +10,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
 	    vmwgfx_simple_resource.o vmwgfx_va.o vmwgfx_blit.o \
 	    vmwgfx_validation.o vmwgfx_page_dirty.o vmwgfx_streamoutput.o \
 	    vmwgfx_devcaps.o ttm_object.o vmwgfx_system_manager.o \
-	    vmwgfx_gem.o
+	    vmwgfx_gem.o vmwgfx_vkms.o
 
 obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index c7d90f96d16a..e34c48fd25d4 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -32,6 +32,7 @@
 #include "vmwgfx_binding.h"
 #include "vmwgfx_devcaps.h"
 #include "vmwgfx_mksstat.h"
+#include "vmwgfx_vkms.h"
 #include "ttm_object.h"
 
 #include <drm/drm_aperture.h>
@@ -910,6 +911,8 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
 			     "Please switch to a supported graphics device to avoid problems.");
 	}
 
+	vmw_vkms_init(dev_priv);
+
 	ret = vmw_dma_select_mode(dev_priv);
 	if (unlikely(ret != 0)) {
 		drm_info(&dev_priv->drm,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 01f41fbb9c3b..4f5d7d13c4aa 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -615,6 +615,8 @@ struct vmw_private {
 
 	uint32 *devcaps;
 
+	bool vkms_enabled;
+
 	/*
 	 * mksGuestStat instance-descriptor and pid arrays
 	 */
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 09214f9339b2..e763cf0e6cfc 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -27,6 +27,7 @@
 #include "vmwgfx_kms.h"
 
 #include "vmwgfx_bo.h"
+#include "vmwgfx_vkms.h"
 #include "vmw_surface_cache.h"
 
 #include <drm/drm_atomic.h>
@@ -37,9 +38,16 @@
 #include <drm/drm_sysfs.h>
 #include <drm/drm_edid.h>
 
+void vmw_du_init(struct vmw_display_unit *du)
+{
+	hrtimer_init(&du->vkms.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	du->vkms.timer.function = &vmw_vkms_vblank_simulate;
+}
+
 void vmw_du_cleanup(struct vmw_display_unit *du)
 {
 	struct vmw_private *dev_priv = vmw_priv(du->primary.dev);
+	hrtimer_cancel(&du->vkms.timer);
 	drm_plane_cleanup(&du->primary);
 	if (vmw_cmd_supported(dev_priv))
 		drm_plane_cleanup(&du->cursor.base);
@@ -957,13 +965,6 @@ void vmw_du_crtc_atomic_begin(struct drm_crtc *crtc,
 {
 }
 
-
-void vmw_du_crtc_atomic_flush(struct drm_crtc *crtc,
-			      struct drm_atomic_state *state)
-{
-}
-
-
 /**
  * vmw_du_crtc_duplicate_state - duplicate crtc state
  * @crtc: DRM crtc
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
index 4a2e3cac1c22..9e83a1553286 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
@@ -376,6 +376,12 @@ struct vmw_display_unit {
 	bool is_implicit;
 	int set_gui_x;
 	int set_gui_y;
+
+	struct {
+		struct hrtimer timer;
+		ktime_t period_ns;
+		struct drm_pending_vblank_event *event;
+	} vkms;
 };
 
 #define vmw_crtc_to_du(x) \
@@ -387,6 +393,7 @@ struct vmw_display_unit {
 /*
  * Shared display unit functions - vmwgfx_kms.c
  */
+void vmw_du_init(struct vmw_display_unit *du);
 void vmw_du_cleanup(struct vmw_display_unit *du);
 void vmw_du_crtc_save(struct drm_crtc *crtc);
 void vmw_du_crtc_restore(struct drm_crtc *crtc);
@@ -473,8 +480,6 @@ int vmw_du_crtc_atomic_check(struct drm_crtc *crtc,
 			     struct drm_atomic_state *state);
 void vmw_du_crtc_atomic_begin(struct drm_crtc *crtc,
 			      struct drm_atomic_state *state);
-void vmw_du_crtc_atomic_flush(struct drm_crtc *crtc,
-			      struct drm_atomic_state *state);
 void vmw_du_crtc_reset(struct drm_crtc *crtc);
 struct drm_crtc_state *vmw_du_crtc_duplicate_state(struct drm_crtc *crtc);
 void vmw_du_crtc_destroy_state(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
index c4db4aecca6c..5befc2719a49 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
@@ -27,6 +27,7 @@
 
 #include "vmwgfx_bo.h"
 #include "vmwgfx_kms.h"
+#include "vmwgfx_vkms.h"
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
@@ -241,33 +242,6 @@ static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 {
 }
 
-/**
- * vmw_ldu_crtc_atomic_enable - Noop
- *
- * @crtc: CRTC associated with the new screen
- * @state: Unused
- *
- * This is called after a mode set has been completed.  Here's
- * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
- * but since for LDU the display plane is closely tied to the
- * CRTC, it makes more sense to do those at plane update time.
- */
-static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
-				       struct drm_atomic_state *state)
-{
-}
-
-/**
- * vmw_ldu_crtc_atomic_disable - Turns off CRTC
- *
- * @crtc: CRTC to be turned off
- * @state: Unused
- */
-static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
-					struct drm_atomic_state *state)
-{
-}
-
 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 	.gamma_set = vmw_du_crtc_gamma_set,
 	.destroy = vmw_ldu_crtc_destroy,
@@ -276,6 +250,9 @@ static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
 	.set_config = drm_atomic_helper_set_config,
 	.page_flip = drm_atomic_helper_page_flip,
+	.enable_vblank          = vmw_vkms_enable_vblank,
+	.disable_vblank         = vmw_vkms_disable_vblank,
+	.get_vblank_timestamp   = vmw_vkms_get_vblank_timestamp,
 };
 
 
@@ -418,9 +395,9 @@ static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
 	.mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
-	.atomic_flush = vmw_du_crtc_atomic_flush,
-	.atomic_enable = vmw_ldu_crtc_atomic_enable,
-	.atomic_disable = vmw_ldu_crtc_atomic_disable,
+	.atomic_flush = vmw_vkms_crtc_atomic_flush,
+	.atomic_enable = vmw_vkms_crtc_atomic_enable,
+	.atomic_disable = vmw_vkms_crtc_atomic_disable,
 };
 
 
@@ -541,6 +518,8 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 			 dev_priv->implicit_placement_property,
 			 1);
 
+	vmw_du_init(&ldu->base);
+
 	return 0;
 
 err_free_unregister:
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
index c6e646895f9e..df0039a8ef29 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
@@ -27,11 +27,13 @@
 
 #include "vmwgfx_bo.h"
 #include "vmwgfx_kms.h"
+#include "vmwgfx_vkms.h"
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_fourcc.h>
+#include <drm/drm_vblank.h>
 
 #define vmw_crtc_to_sou(x) \
 	container_of(x, struct vmw_screen_object_unit, base.crtc)
@@ -267,19 +269,6 @@ static void vmw_sou_crtc_helper_prepare(struct drm_crtc *crtc)
 {
 }
 
-/**
- * vmw_sou_crtc_atomic_enable - Noop
- *
- * @crtc: CRTC associated with the new screen
- * @state: Unused
- *
- * This is called after a mode set has been completed.
- */
-static void vmw_sou_crtc_atomic_enable(struct drm_crtc *crtc,
-				       struct drm_atomic_state *state)
-{
-}
-
 /**
  * vmw_sou_crtc_atomic_disable - Turns off CRTC
  *
@@ -302,6 +291,9 @@ static void vmw_sou_crtc_atomic_disable(struct drm_crtc *crtc,
 	sou = vmw_crtc_to_sou(crtc);
 	dev_priv = vmw_priv(crtc->dev);
 
+	if (dev_priv->vkms_enabled)
+		drm_crtc_vblank_off(crtc);
+
 	if (sou->defined) {
 		ret = vmw_sou_fifo_destroy(dev_priv, sou);
 		if (ret)
@@ -317,6 +309,9 @@ static const struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
 	.set_config = drm_atomic_helper_set_config,
 	.page_flip = drm_atomic_helper_page_flip,
+	.enable_vblank          = vmw_vkms_enable_vblank,
+	.disable_vblank         = vmw_vkms_disable_vblank,
+	.get_vblank_timestamp   = vmw_vkms_get_vblank_timestamp,
 };
 
 /*
@@ -794,8 +789,8 @@ static const struct drm_crtc_helper_funcs vmw_sou_crtc_helper_funcs = {
 	.mode_set_nofb = vmw_sou_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
-	.atomic_flush = vmw_du_crtc_atomic_flush,
-	.atomic_enable = vmw_sou_crtc_atomic_enable,
+	.atomic_flush = vmw_vkms_crtc_atomic_flush,
+	.atomic_enable = vmw_vkms_crtc_atomic_enable,
 	.atomic_disable = vmw_sou_crtc_atomic_disable,
 };
 
@@ -905,6 +900,9 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 				   dev->mode_config.suggested_x_property, 0);
 	drm_object_attach_property(&connector->base,
 				   dev->mode_config.suggested_y_property, 0);
+
+	vmw_du_init(&sou->base);
+
 	return 0;
 
 err_free_unregister:
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
index 3c8414a13dba..665bde7e0be0 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
@@ -27,12 +27,14 @@
 
 #include "vmwgfx_bo.h"
 #include "vmwgfx_kms.h"
+#include "vmwgfx_vkms.h"
 #include "vmw_surface_cache.h"
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_fourcc.h>
+#include <drm/drm_vblank.h>
 
 #define vmw_crtc_to_stdu(x) \
 	container_of(x, struct vmw_screen_target_display_unit, base.crtc)
@@ -412,11 +414,6 @@ static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
 {
 }
 
-static void vmw_stdu_crtc_atomic_enable(struct drm_crtc *crtc,
-					struct drm_atomic_state *state)
-{
-}
-
 static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
 					 struct drm_atomic_state *state)
 {
@@ -424,7 +421,6 @@ static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
 	struct vmw_screen_target_display_unit *stdu;
 	int ret;
 
-
 	if (!crtc) {
 		DRM_ERROR("CRTC is NULL\n");
 		return;
@@ -433,6 +429,9 @@ static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
 	stdu     = vmw_crtc_to_stdu(crtc);
 	dev_priv = vmw_priv(crtc->dev);
 
+	if (dev_priv->vkms_enabled)
+		drm_crtc_vblank_off(crtc);
+
 	if (stdu->defined) {
 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
 		if (ret)
@@ -770,7 +769,6 @@ out_unref:
 	return ret;
 }
 
-
 /*
  *  Screen Target CRTC dispatch table
  */
@@ -782,6 +780,9 @@ static const struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
 	.set_config = drm_atomic_helper_set_config,
 	.page_flip = drm_atomic_helper_page_flip,
+	.enable_vblank		= vmw_vkms_enable_vblank,
+	.disable_vblank		= vmw_vkms_disable_vblank,
+	.get_vblank_timestamp	= vmw_vkms_get_vblank_timestamp,
 };
 
 
@@ -1457,8 +1458,8 @@ static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
 	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
-	.atomic_flush = vmw_du_crtc_atomic_flush,
-	.atomic_enable = vmw_stdu_crtc_atomic_enable,
+	.atomic_flush = vmw_vkms_crtc_atomic_flush,
+	.atomic_enable = vmw_vkms_crtc_atomic_enable,
 	.atomic_disable = vmw_stdu_crtc_atomic_disable,
 };
 
@@ -1575,6 +1576,9 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
 				   dev->mode_config.suggested_x_property, 0);
 	drm_object_attach_property(&connector->base,
 				   dev->mode_config.suggested_y_property, 0);
+
+	vmw_du_init(&stdu->base);
+
 	return 0;
 
 err_free_unregister:
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
new file mode 100644
index 000000000000..ff76bfd70f91
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright (c) 2024 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "vmwgfx_vkms.h"
+
+#include "vmwgfx_drv.h"
+#include "vmwgfx_kms.h"
+#include "vmwgfx_vkms.h"
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+
+#define GUESTINFO_VBLANK  "guestinfo.vmwgfx.vkms_enable"
+
+enum hrtimer_restart
+vmw_vkms_vblank_simulate(struct hrtimer *timer)
+{
+	struct vmw_display_unit *du = container_of(timer, struct vmw_display_unit, vkms.timer);
+	struct drm_crtc *crtc = &du->crtc;
+	u64 ret_overrun;
+	bool ret;
+
+	ret_overrun = hrtimer_forward_now(&du->vkms.timer,
+					  du->vkms.period_ns);
+	if (ret_overrun != 1)
+		DRM_WARN("%s: vblank timer overrun\n", __func__);
+
+	ret = drm_crtc_handle_vblank(crtc);
+	/* Don't queue timer again when vblank is disabled. */
+	if (!ret)
+		return HRTIMER_NORESTART;
+
+	return HRTIMER_RESTART;
+}
+
+void
+vmw_vkms_init(struct vmw_private *vmw)
+{
+	char buffer[64];
+	const size_t max_buf_len = sizeof(buffer) - 1;
+	size_t buf_len = max_buf_len;
+	int ret;
+
+	vmw->vkms_enabled = false;
+
+	ret = vmw_host_get_guestinfo(GUESTINFO_VBLANK, buffer, &buf_len);
+	if (ret || buf_len > max_buf_len)
+		return;
+	buffer[buf_len] = '\0';
+
+	ret = kstrtobool(buffer, &vmw->vkms_enabled);
+	if (!ret && vmw->vkms_enabled) {
+		ret = drm_vblank_init(&vmw->drm, VMWGFX_NUM_DISPLAY_UNITS);
+		vmw->vkms_enabled = (ret == 0);
+		drm_info(&vmw->drm, "vkms_enabled = %d\n", vmw->vkms_enabled);
+	}
+}
+
+bool
+vmw_vkms_get_vblank_timestamp(struct drm_crtc *crtc,
+			      int *max_error,
+			      ktime_t *vblank_time,
+			      bool in_vblank_irq)
+{
+	struct drm_device *dev = crtc->dev;
+	struct vmw_private *vmw = vmw_priv(dev);
+	unsigned int pipe = crtc->index;
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+
+	if (!vmw->vkms_enabled)
+		return false;
+
+	if (!READ_ONCE(vblank->enabled)) {
+		*vblank_time = ktime_get();
+		return true;
+	}
+
+	*vblank_time = READ_ONCE(du->vkms.timer.node.expires);
+
+	if (WARN_ON(*vblank_time == vblank->time))
+		return true;
+
+	/*
+	 * To prevent races we roll the hrtimer forward before we do any
+	 * interrupt processing - this is how real hw works (the interrupt is
+	 * only generated after all the vblank registers are updated) and what
+	 * the vblank core expects. Therefore we need to always correct the
+	 * timestampe by one frame.
+	 */
+	*vblank_time -= du->vkms.period_ns;
+
+	return true;
+}
+
+int
+vmw_vkms_enable_vblank(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct vmw_private *vmw = vmw_priv(dev);
+	unsigned int pipe = drm_crtc_index(crtc);
+	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+
+	if (!vmw->vkms_enabled)
+		return -EINVAL;
+
+	drm_calc_timestamping_constants(crtc, &crtc->mode);
+
+	du->vkms.period_ns = ktime_set(0, vblank->framedur_ns);
+	hrtimer_start(&du->vkms.timer, du->vkms.period_ns, HRTIMER_MODE_REL);
+
+	return 0;
+}
+
+void
+vmw_vkms_disable_vblank(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (!vmw->vkms_enabled)
+		return;
+
+	hrtimer_try_to_cancel(&du->vkms.timer);
+}
+
+void
+vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc,
+			   struct drm_atomic_state *state)
+{
+	unsigned long flags;
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (vmw->vkms_enabled && crtc->state->event) {
+		spin_lock_irqsave(&crtc->dev->event_lock, flags);
+
+		if (drm_crtc_vblank_get(crtc) != 0)
+			drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		else
+			drm_crtc_arm_vblank_event(crtc, crtc->state->event);
+
+		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+
+		crtc->state->event = NULL;
+	}
+}
+
+void
+vmw_vkms_crtc_atomic_enable(struct drm_crtc *crtc,
+			    struct drm_atomic_state *state)
+{
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (vmw->vkms_enabled)
+		drm_crtc_vblank_on(crtc);
+}
+
+void
+vmw_vkms_crtc_atomic_disable(struct drm_crtc *crtc,
+			     struct drm_atomic_state *state)
+{
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (vmw->vkms_enabled)
+		drm_crtc_vblank_off(crtc);
+}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h
new file mode 100644
index 000000000000..0f6d4ab9ebe3
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/**************************************************************************
+ *
+ * Copyright (c) 2024 Broadcom. All Rights Reserved. The term
+ * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef VMWGFX_VKMS_H_
+#define VMWGFX_VKMS_H_
+
+#include <linux/hrtimer_types.h>
+#include <linux/types.h>
+
+struct vmw_private;
+struct drm_crtc;
+struct drm_atomic_state;
+
+void vmw_vkms_init(struct vmw_private *vmw);
+bool vmw_vkms_get_vblank_timestamp(struct drm_crtc *crtc,
+				   int *max_error,
+				   ktime_t *vblank_time,
+				   bool in_vblank_irq);
+int vmw_vkms_enable_vblank(struct drm_crtc *crtc);
+void vmw_vkms_disable_vblank(struct drm_crtc *crtc);
+void vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state);
+enum hrtimer_restart vmw_vkms_vblank_simulate(struct hrtimer *timer);
+void vmw_vkms_crtc_atomic_enable(struct drm_crtc *crtc,
+				 struct drm_atomic_state *state);
+void vmw_vkms_crtc_atomic_disable(struct drm_crtc *crtc,
+				  struct drm_atomic_state *state);
+
+#endif
-- 
cgit 


From 7b0062036c3b71b4a69e244ecf0502c06c4cf5f0 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zack.rusin@broadcom.com>
Date: Thu, 11 Apr 2024 22:55:08 -0400
Subject: drm/vmwgfx: Implement virtual crc generation

crc checksums are used to validate the output. Normally they're part
of the actual display hardware but on virtual stack there's nothing
to automatically generate them.

Implement crc generation for the vmwgfx stack. This works only on
screen targets, where it's possibly to easily make sure that the
guest side contents of the surface matches the host sides output.

Just like the vblank support, crc generation can only be enabled via:
guestinfo.vmwgfx.vkms_enable = "TRUE"
option in the vmx file.

Makes IGT's kms_pipe_crc_basic pass and allows a huge number of other
IGT tests which require CRC generation of the output to actually run
on vmwgfx. Makes it possible to actually validate a lof of the kms and
drm functionality with vmwgfx.

Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Acked-by: Martin Krastev <martin.krastev@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412025511.78553-3-zack.rusin@broadcom.com
---
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c      |   1 +
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.h      |   2 +
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c      |  31 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.h      |  15 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c |  32 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c     |  22 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c     | 457 ++++++++++++++++++++++++++++++-
 drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h     |  28 +-
 8 files changed, 553 insertions(+), 35 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index e34c48fd25d4..89d3679d2608 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1198,6 +1198,7 @@ static void vmw_driver_unload(struct drm_device *dev)
 
 	vmw_svga_disable(dev_priv);
 
+	vmw_vkms_cleanup(dev_priv);
 	vmw_kms_close(dev_priv);
 	vmw_overlay_close(dev_priv);
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 4f5d7d13c4aa..ddbceaa31b59 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -616,6 +616,7 @@ struct vmw_private {
 	uint32 *devcaps;
 
 	bool vkms_enabled;
+	struct workqueue_struct *crc_workq;
 
 	/*
 	 * mksGuestStat instance-descriptor and pid arrays
@@ -811,6 +812,7 @@ void vmw_resource_mob_attach(struct vmw_resource *res);
 void vmw_resource_mob_detach(struct vmw_resource *res);
 void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
 			       pgoff_t end);
+int vmw_resource_clean(struct vmw_resource *res);
 int vmw_resources_clean(struct vmw_bo *vbo, pgoff_t start,
 			pgoff_t end, pgoff_t *num_prefault);
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index e763cf0e6cfc..e33e5993d8fc 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -40,14 +40,14 @@
 
 void vmw_du_init(struct vmw_display_unit *du)
 {
-	hrtimer_init(&du->vkms.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-	du->vkms.timer.function = &vmw_vkms_vblank_simulate;
+	vmw_vkms_crtc_init(&du->crtc);
 }
 
 void vmw_du_cleanup(struct vmw_display_unit *du)
 {
 	struct vmw_private *dev_priv = vmw_priv(du->primary.dev);
-	hrtimer_cancel(&du->vkms.timer);
+
+	vmw_vkms_crtc_cleanup(&du->crtc);
 	drm_plane_cleanup(&du->primary);
 	if (vmw_cmd_supported(dev_priv))
 		drm_plane_cleanup(&du->cursor.base);
@@ -963,6 +963,7 @@ int vmw_du_crtc_atomic_check(struct drm_crtc *crtc,
 void vmw_du_crtc_atomic_begin(struct drm_crtc *crtc,
 			      struct drm_atomic_state *state)
 {
+	vmw_vkms_crtc_atomic_begin(crtc, state);
 }
 
 /**
@@ -2029,6 +2030,29 @@ vmw_kms_create_hotplug_mode_update_property(struct vmw_private *dev_priv)
 					  "hotplug_mode_update", 0, 1);
 }
 
+static void
+vmw_atomic_commit_tail(struct drm_atomic_state *old_state)
+{
+	struct vmw_private *vmw = vmw_priv(old_state->dev);
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state;
+	int i;
+
+	drm_atomic_helper_commit_tail(old_state);
+
+	if (vmw->vkms_enabled) {
+		for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
+			struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+			(void)old_crtc_state;
+			flush_work(&du->vkms.crc_generator_work);
+		}
+	}
+}
+
+static const struct drm_mode_config_helper_funcs vmw_mode_config_helpers = {
+	.atomic_commit_tail = vmw_atomic_commit_tail,
+};
+
 int vmw_kms_init(struct vmw_private *dev_priv)
 {
 	struct drm_device *dev = &dev_priv->drm;
@@ -2048,6 +2072,7 @@ int vmw_kms_init(struct vmw_private *dev_priv)
 	dev->mode_config.max_width = dev_priv->texture_max_width;
 	dev->mode_config.max_height = dev_priv->texture_max_height;
 	dev->mode_config.preferred_depth = dev_priv->assume_16bpp ? 16 : 32;
+	dev->mode_config.helper_private = &vmw_mode_config_helpers;
 
 	drm_mode_create_suggested_offset_properties(dev);
 	vmw_kms_create_hotplug_mode_update_property(dev_priv);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
index 9e83a1553286..bf9931e3a728 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h
@@ -378,9 +378,22 @@ struct vmw_display_unit {
 	int set_gui_y;
 
 	struct {
+		struct work_struct crc_generator_work;
 		struct hrtimer timer;
 		ktime_t period_ns;
-		struct drm_pending_vblank_event *event;
+
+		/* protects concurrent access to the vblank handler */
+		atomic_t atomic_lock;
+		/* protected by @atomic_lock */
+		bool crc_enabled;
+		struct vmw_surface *surface;
+
+		/* protects concurrent access to the crc worker */
+		spinlock_t crc_state_lock;
+		/* protected by @crc_state_lock */
+		bool crc_pending;
+		u64 frame_start;
+		u64 frame_end;
 	} vkms;
 };
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index ca300c7427d2..848dba09981b 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -1064,6 +1064,22 @@ void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
 					   end << PAGE_SHIFT);
 }
 
+int vmw_resource_clean(struct vmw_resource *res)
+{
+	int ret = 0;
+
+	if (res->res_dirty) {
+		if (!res->func->clean)
+			return -EINVAL;
+
+		ret = res->func->clean(res);
+		if (ret)
+			return ret;
+		res->res_dirty = false;
+	}
+	return ret;
+}
+
 /**
  * vmw_resources_clean - Clean resources intersecting a mob range
  * @vbo: The mob buffer object
@@ -1080,6 +1096,7 @@ int vmw_resources_clean(struct vmw_bo *vbo, pgoff_t start,
 	unsigned long res_start = start << PAGE_SHIFT;
 	unsigned long res_end = end << PAGE_SHIFT;
 	unsigned long last_cleaned = 0;
+	int ret;
 
 	/*
 	 * Find the resource with lowest backup_offset that intersects the
@@ -1106,18 +1123,9 @@ int vmw_resources_clean(struct vmw_bo *vbo, pgoff_t start,
 	 * intersecting the range.
 	 */
 	while (found) {
-		if (found->res_dirty) {
-			int ret;
-
-			if (!found->func->clean)
-				return -EINVAL;
-
-			ret = found->func->clean(found);
-			if (ret)
-				return ret;
-
-			found->res_dirty = false;
-		}
+		ret = vmw_resource_clean(found);
+		if (ret)
+			return ret;
 		last_cleaned = found->guest_memory_offset + found->guest_memory_size;
 		cur = rb_next(&found->mob_node);
 		if (!cur)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
index 665bde7e0be0..2041c4d48daa 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
@@ -409,11 +409,6 @@ static void vmw_stdu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 			  crtc->x, crtc->y);
 }
 
-
-static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
-{
-}
-
 static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
 					 struct drm_atomic_state *state)
 {
@@ -783,6 +778,9 @@ static const struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
 	.enable_vblank		= vmw_vkms_enable_vblank,
 	.disable_vblank		= vmw_vkms_disable_vblank,
 	.get_vblank_timestamp	= vmw_vkms_get_vblank_timestamp,
+	.get_crc_sources	= vmw_vkms_get_crc_sources,
+	.set_crc_source		= vmw_vkms_set_crc_source,
+	.verify_crc_source	= vmw_vkms_verify_crc_source,
 };
 
 
@@ -1414,6 +1412,17 @@ vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
 		vmw_fence_obj_unreference(&fence);
 }
 
+static void
+vmw_stdu_crtc_atomic_flush(struct drm_crtc *crtc,
+			   struct drm_atomic_state *state)
+{
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+	struct vmw_screen_target_display_unit *stdu = vmw_crtc_to_stdu(crtc);
+
+	if (vmw->vkms_enabled)
+		vmw_vkms_set_crc_surface(crtc, stdu->display_srf);
+	vmw_vkms_crtc_atomic_flush(crtc, state);
+}
 
 static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
@@ -1454,11 +1463,10 @@ drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
 };
 
 static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
-	.prepare = vmw_stdu_crtc_helper_prepare,
 	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
 	.atomic_check = vmw_du_crtc_atomic_check,
 	.atomic_begin = vmw_du_crtc_atomic_begin,
-	.atomic_flush = vmw_vkms_crtc_atomic_flush,
+	.atomic_flush = vmw_stdu_crtc_atomic_flush,
 	.atomic_enable = vmw_vkms_crtc_atomic_enable,
 	.atomic_disable = vmw_stdu_crtc_atomic_disable,
 };
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
index ff76bfd70f91..7e93a45948f7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
@@ -28,33 +28,179 @@
 
 #include "vmwgfx_vkms.h"
 
+#include "vmwgfx_bo.h"
 #include "vmwgfx_drv.h"
 #include "vmwgfx_kms.h"
 #include "vmwgfx_vkms.h"
 
+#include "vmw_surface_cache.h"
+
 #include <drm/drm_crtc.h>
+#include <drm/drm_debugfs_crc.h>
 #include <drm/drm_print.h>
 #include <drm/drm_vblank.h>
 
+#include <linux/crc32.h>
+#include <linux/delay.h>
+
 #define GUESTINFO_VBLANK  "guestinfo.vmwgfx.vkms_enable"
 
-enum hrtimer_restart
+static int
+vmw_surface_sync(struct vmw_private *vmw,
+		 struct vmw_surface *surf)
+{
+	int ret;
+	struct vmw_fence_obj *fence = NULL;
+	struct vmw_bo *bo = surf->res.guest_memory_bo;
+
+	vmw_resource_clean(&surf->res);
+
+	ret = ttm_bo_reserve(&bo->tbo, false, false, NULL);
+	if (ret != 0) {
+		drm_warn(&vmw->drm, "%s: failed reserve\n", __func__);
+		goto done;
+	}
+
+	ret = vmw_execbuf_fence_commands(NULL, vmw, &fence, NULL);
+	if (ret != 0) {
+		drm_warn(&vmw->drm, "%s: failed execbuf\n", __func__);
+		ttm_bo_unreserve(&bo->tbo);
+		goto done;
+	}
+
+	dma_fence_wait(&fence->base, false);
+	dma_fence_put(&fence->base);
+
+	ttm_bo_unreserve(&bo->tbo);
+done:
+	return ret;
+}
+
+static int
+compute_crc(struct drm_crtc *crtc,
+	    struct vmw_surface *surf,
+	    u32 *crc)
+{
+	u8 *mapped_surface;
+	struct vmw_bo *bo = surf->res.guest_memory_bo;
+	const struct SVGA3dSurfaceDesc *desc =
+		vmw_surface_get_desc(surf->metadata.format);
+	u32 row_pitch_bytes;
+	SVGA3dSize blocks;
+	u32 y;
+
+	*crc = 0;
+
+	vmw_surface_get_size_in_blocks(desc, &surf->metadata.base_size, &blocks);
+	row_pitch_bytes = blocks.width * desc->pitchBytesPerBlock;
+	WARN_ON(!bo);
+	mapped_surface = vmw_bo_map_and_cache(bo);
+
+	for (y = 0; y < blocks.height; y++) {
+		*crc = crc32_le(*crc, mapped_surface, row_pitch_bytes);
+		mapped_surface += row_pitch_bytes;
+	}
+
+	vmw_bo_unmap(bo);
+
+	return 0;
+}
+
+static void
+crc_generate_worker(struct work_struct *work)
+{
+	struct vmw_display_unit *du =
+		container_of(work, struct vmw_display_unit, vkms.crc_generator_work);
+	struct drm_crtc *crtc = &du->crtc;
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+	bool crc_pending;
+	u64 frame_start, frame_end;
+	u32 crc32 = 0;
+	struct vmw_surface *surf = 0;
+	int ret;
+
+	spin_lock_irq(&du->vkms.crc_state_lock);
+	crc_pending = du->vkms.crc_pending;
+	spin_unlock_irq(&du->vkms.crc_state_lock);
+
+	/*
+	 * We raced with the vblank hrtimer and previous work already computed
+	 * the crc, nothing to do.
+	 */
+	if (!crc_pending)
+		return;
+
+	spin_lock_irq(&du->vkms.crc_state_lock);
+	surf = du->vkms.surface;
+	spin_unlock_irq(&du->vkms.crc_state_lock);
+
+	if (vmw_surface_sync(vmw, surf)) {
+		drm_warn(crtc->dev, "CRC worker wasn't able to sync the crc surface!\n");
+		return;
+	}
+
+	ret = compute_crc(crtc, surf, &crc32);
+	if (ret)
+		return;
+
+	spin_lock_irq(&du->vkms.crc_state_lock);
+	frame_start = du->vkms.frame_start;
+	frame_end = du->vkms.frame_end;
+	crc_pending = du->vkms.crc_pending;
+	du->vkms.frame_start = 0;
+	du->vkms.frame_end = 0;
+	du->vkms.crc_pending = false;
+	spin_unlock_irq(&du->vkms.crc_state_lock);
+
+	/*
+	 * The worker can fall behind the vblank hrtimer, make sure we catch up.
+	 */
+	while (frame_start <= frame_end)
+		drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
+}
+
+static enum hrtimer_restart
 vmw_vkms_vblank_simulate(struct hrtimer *timer)
 {
 	struct vmw_display_unit *du = container_of(timer, struct vmw_display_unit, vkms.timer);
 	struct drm_crtc *crtc = &du->crtc;
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+	struct vmw_surface *surf = NULL;
 	u64 ret_overrun;
-	bool ret;
+	bool locked, ret;
 
 	ret_overrun = hrtimer_forward_now(&du->vkms.timer,
 					  du->vkms.period_ns);
 	if (ret_overrun != 1)
-		DRM_WARN("%s: vblank timer overrun\n", __func__);
+		drm_dbg_driver(crtc->dev, "vblank timer missed %lld frames.\n",
+			       ret_overrun - 1);
 
+	locked = vmw_vkms_vblank_trylock(crtc);
 	ret = drm_crtc_handle_vblank(crtc);
-	/* Don't queue timer again when vblank is disabled. */
-	if (!ret)
-		return HRTIMER_NORESTART;
+	WARN_ON(!ret);
+	if (!locked)
+		return HRTIMER_RESTART;
+	surf = du->vkms.surface;
+	vmw_vkms_unlock(crtc);
+
+	if (du->vkms.crc_enabled && surf) {
+		u64 frame = drm_crtc_accurate_vblank_count(crtc);
+
+		spin_lock(&du->vkms.crc_state_lock);
+		if (!du->vkms.crc_pending)
+			du->vkms.frame_start = frame;
+		else
+			drm_dbg_driver(crtc->dev,
+				       "crc worker falling behind, frame_start: %llu, frame_end: %llu\n",
+				       du->vkms.frame_start, frame);
+		du->vkms.frame_end = frame;
+		du->vkms.crc_pending = true;
+		spin_unlock(&du->vkms.crc_state_lock);
+
+		ret = queue_work(vmw->crc_workq, &du->vkms.crc_generator_work);
+		if (!ret)
+			drm_dbg_driver(crtc->dev, "Composer worker already queued\n");
+	}
 
 	return HRTIMER_RESTART;
 }
@@ -78,8 +224,21 @@ vmw_vkms_init(struct vmw_private *vmw)
 	if (!ret && vmw->vkms_enabled) {
 		ret = drm_vblank_init(&vmw->drm, VMWGFX_NUM_DISPLAY_UNITS);
 		vmw->vkms_enabled = (ret == 0);
-		drm_info(&vmw->drm, "vkms_enabled = %d\n", vmw->vkms_enabled);
 	}
+
+	vmw->crc_workq = alloc_ordered_workqueue("vmwgfx_crc_generator", 0);
+	if (!vmw->crc_workq) {
+		drm_warn(&vmw->drm, "crc workqueue allocation failed. Disabling vkms.");
+		vmw->vkms_enabled = false;
+	}
+	if (vmw->vkms_enabled)
+		drm_info(&vmw->drm, "VKMS enabled\n");
+}
+
+void
+vmw_vkms_cleanup(struct vmw_private *vmw)
+{
+	destroy_workqueue(vmw->crc_workq);
 }
 
 bool
@@ -133,6 +292,8 @@ vmw_vkms_enable_vblank(struct drm_crtc *crtc)
 
 	drm_calc_timestamping_constants(crtc, &crtc->mode);
 
+	hrtimer_init(&du->vkms.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	du->vkms.timer.function = &vmw_vkms_vblank_simulate;
 	du->vkms.period_ns = ktime_set(0, vblank->framedur_ns);
 	hrtimer_start(&du->vkms.timer, du->vkms.period_ns, HRTIMER_MODE_REL);
 
@@ -148,7 +309,46 @@ vmw_vkms_disable_vblank(struct drm_crtc *crtc)
 	if (!vmw->vkms_enabled)
 		return;
 
-	hrtimer_try_to_cancel(&du->vkms.timer);
+	hrtimer_cancel(&du->vkms.timer);
+	du->vkms.surface = NULL;
+	du->vkms.period_ns = ktime_set(0, 0);
+}
+
+enum vmw_vkms_lock_state {
+	VMW_VKMS_LOCK_UNLOCKED     = 0,
+	VMW_VKMS_LOCK_MODESET      = 1,
+	VMW_VKMS_LOCK_VBLANK       = 2
+};
+
+void
+vmw_vkms_crtc_init(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+
+	atomic_set(&du->vkms.atomic_lock, VMW_VKMS_LOCK_UNLOCKED);
+	spin_lock_init(&du->vkms.crc_state_lock);
+
+	INIT_WORK(&du->vkms.crc_generator_work, crc_generate_worker);
+	du->vkms.surface = NULL;
+}
+
+void
+vmw_vkms_crtc_cleanup(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+
+	WARN_ON(work_pending(&du->vkms.crc_generator_work));
+	hrtimer_cancel(&du->vkms.timer);
+}
+
+void
+vmw_vkms_crtc_atomic_begin(struct drm_crtc *crtc,
+			   struct drm_atomic_state *state)
+{
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (vmw->vkms_enabled)
+		vmw_vkms_modeset_lock(crtc);
 }
 
 void
@@ -158,7 +358,10 @@ vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 	unsigned long flags;
 	struct vmw_private *vmw = vmw_priv(crtc->dev);
 
-	if (vmw->vkms_enabled && crtc->state->event) {
+	if (!vmw->vkms_enabled)
+		return;
+
+	if (crtc->state->event) {
 		spin_lock_irqsave(&crtc->dev->event_lock, flags);
 
 		if (drm_crtc_vblank_get(crtc) != 0)
@@ -170,6 +373,8 @@ vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 
 		crtc->state->event = NULL;
 	}
+
+	vmw_vkms_unlock(crtc);
 }
 
 void
@@ -191,3 +396,237 @@ vmw_vkms_crtc_atomic_disable(struct drm_crtc *crtc,
 	if (vmw->vkms_enabled)
 		drm_crtc_vblank_off(crtc);
 }
+
+static bool
+is_crc_supported(struct drm_crtc *crtc)
+{
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (!vmw->vkms_enabled)
+		return false;
+
+	if (vmw->active_display_unit != vmw_du_screen_target)
+		return false;
+
+	return true;
+}
+
+static const char * const pipe_crc_sources[] = {"auto"};
+
+static int
+crc_parse_source(const char *src_name,
+		 bool *enabled)
+{
+	int ret = 0;
+
+	if (!src_name) {
+		*enabled = false;
+	} else if (strcmp(src_name, "auto") == 0) {
+		*enabled = true;
+	} else {
+		*enabled = false;
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+const char *const *
+vmw_vkms_get_crc_sources(struct drm_crtc *crtc,
+			 size_t *count)
+{
+	*count = 0;
+	if (!is_crc_supported(crtc))
+		return NULL;
+
+	*count = ARRAY_SIZE(pipe_crc_sources);
+	return pipe_crc_sources;
+}
+
+int
+vmw_vkms_verify_crc_source(struct drm_crtc *crtc,
+			   const char *src_name,
+			   size_t *values_cnt)
+{
+	bool enabled;
+
+	if (!is_crc_supported(crtc))
+		return -EINVAL;
+
+	if (crc_parse_source(src_name, &enabled) < 0) {
+		drm_dbg_driver(crtc->dev, "unknown source '%s'\n", src_name);
+		return -EINVAL;
+	}
+
+	*values_cnt = 1;
+
+	return 0;
+}
+
+int
+vmw_vkms_set_crc_source(struct drm_crtc *crtc,
+			const char *src_name)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	bool enabled, prev_enabled, locked;
+	int ret;
+
+	if (!is_crc_supported(crtc))
+		return -EINVAL;
+
+	ret = crc_parse_source(src_name, &enabled);
+
+	if (enabled)
+		drm_crtc_vblank_get(crtc);
+
+	locked = vmw_vkms_modeset_lock_relaxed(crtc);
+	prev_enabled = du->vkms.crc_enabled;
+	du->vkms.crc_enabled = enabled;
+	if (locked)
+		vmw_vkms_unlock(crtc);
+
+	if (prev_enabled)
+		drm_crtc_vblank_put(crtc);
+
+	return ret;
+}
+
+void
+vmw_vkms_set_crc_surface(struct drm_crtc *crtc,
+			 struct vmw_surface *surf)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	struct vmw_private *vmw = vmw_priv(crtc->dev);
+
+	if (vmw->vkms_enabled) {
+		WARN_ON(atomic_read(&du->vkms.atomic_lock) != VMW_VKMS_LOCK_MODESET);
+		du->vkms.surface = surf;
+	}
+}
+
+/**
+ * vmw_vkms_lock_max_wait_ns - Return the max wait for the vkms lock
+ * @du: The vmw_display_unit from which to grab the vblank timings
+ *
+ * Returns the maximum wait time used to acquire the vkms lock. By
+ * default uses a time of a single frame and in case where vblank
+ * was not initialized for the display unit 1/60th of a second.
+ */
+static inline u64
+vmw_vkms_lock_max_wait_ns(struct vmw_display_unit *du)
+{
+	s64 nsecs = ktime_to_ns(du->vkms.period_ns);
+
+	return  (nsecs > 0) ? nsecs : 16666666;
+}
+
+/**
+ * vmw_vkms_modeset_lock - Protects access to crtc during modeset
+ * @crtc: The crtc to lock for vkms
+ *
+ * This function prevents the VKMS timers/callbacks from being called
+ * while a modeset operation is in process. We don't want the callbacks
+ * e.g. the vblank simulator to be trying to access incomplete state
+ * so we need to make sure they execute only when the modeset has
+ * finished.
+ *
+ * Normally this would have been done with a spinlock but locking the
+ * entire atomic modeset with vmwgfx is impossible because kms prepare
+ * executes non-atomic ops (e.g. vmw_validation_prepare holds a mutex to
+ * guard various bits of state). Which means that we need to synchronize
+ * atomic context (the vblank handler) with the non-atomic entirity
+ * of kms - so use an atomic_t to track which part of vkms has access
+ * to the basic vkms state.
+ */
+void
+vmw_vkms_modeset_lock(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	const u64 nsecs_delay = 10;
+	const u64 MAX_NSECS_DELAY = vmw_vkms_lock_max_wait_ns(du);
+	u64 total_delay = 0;
+	int ret;
+
+	do {
+		ret = atomic_cmpxchg(&du->vkms.atomic_lock,
+				     VMW_VKMS_LOCK_UNLOCKED,
+				     VMW_VKMS_LOCK_MODESET);
+		if (ret == VMW_VKMS_LOCK_UNLOCKED || total_delay >= MAX_NSECS_DELAY)
+			break;
+		ndelay(nsecs_delay);
+		total_delay += nsecs_delay;
+	} while (1);
+
+	if (total_delay >= MAX_NSECS_DELAY) {
+		drm_warn(crtc->dev, "VKMS lock expired! total_delay = %lld, ret = %d, cur = %d\n",
+			 total_delay, ret, atomic_read(&du->vkms.atomic_lock));
+	}
+}
+
+/**
+ * vmw_vkms_modeset_lock_relaxed - Protects access to crtc during modeset
+ * @crtc: The crtc to lock for vkms
+ *
+ * Much like vmw_vkms_modeset_lock except that when the crtc is currently
+ * in a modeset it will return immediately.
+ *
+ * Returns true if actually locked vkms to modeset or false otherwise.
+ */
+bool
+vmw_vkms_modeset_lock_relaxed(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	const u64 nsecs_delay = 10;
+	const u64 MAX_NSECS_DELAY = vmw_vkms_lock_max_wait_ns(du);
+	u64 total_delay = 0;
+	int ret;
+
+	do {
+		ret = atomic_cmpxchg(&du->vkms.atomic_lock,
+				     VMW_VKMS_LOCK_UNLOCKED,
+				     VMW_VKMS_LOCK_MODESET);
+		if (ret == VMW_VKMS_LOCK_UNLOCKED ||
+		    ret == VMW_VKMS_LOCK_MODESET ||
+		    total_delay >= MAX_NSECS_DELAY)
+			break;
+		ndelay(nsecs_delay);
+		total_delay += nsecs_delay;
+	} while (1);
+
+	if (total_delay >= MAX_NSECS_DELAY) {
+		drm_warn(crtc->dev, "VKMS relaxed lock expired!\n");
+		return false;
+	}
+
+	return ret == VMW_VKMS_LOCK_UNLOCKED;
+}
+
+/**
+ * vmw_vkms_vblank_trylock - Protects access to crtc during vblank
+ * @crtc: The crtc to lock for vkms
+ *
+ * Tries to lock vkms for vblank, returns immediately.
+ *
+ * Returns true if locked vkms to vblank or false otherwise.
+ */
+bool
+vmw_vkms_vblank_trylock(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+	u32 ret;
+
+	ret = atomic_cmpxchg(&du->vkms.atomic_lock,
+			     VMW_VKMS_LOCK_UNLOCKED,
+			     VMW_VKMS_LOCK_VBLANK);
+
+	return ret == VMW_VKMS_LOCK_UNLOCKED;
+}
+
+void
+vmw_vkms_unlock(struct drm_crtc *crtc)
+{
+	struct vmw_display_unit *du = vmw_crtc_to_du(crtc);
+
+	/* Release flag; mark it as unlocked. */
+	atomic_set(&du->vkms.atomic_lock, VMW_VKMS_LOCK_UNLOCKED);
+}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h
index 0f6d4ab9ebe3..69ddd33a8444 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_vkms.h
@@ -32,22 +32,44 @@
 #include <linux/hrtimer_types.h>
 #include <linux/types.h>
 
-struct vmw_private;
-struct drm_crtc;
 struct drm_atomic_state;
+struct drm_crtc;
+struct vmw_private;
+struct vmw_surface;
 
 void vmw_vkms_init(struct vmw_private *vmw);
+void vmw_vkms_cleanup(struct vmw_private *vmw);
+
+void vmw_vkms_modeset_lock(struct drm_crtc *crtc);
+bool vmw_vkms_modeset_lock_relaxed(struct drm_crtc *crtc);
+bool vmw_vkms_vblank_trylock(struct drm_crtc *crtc);
+void vmw_vkms_unlock(struct drm_crtc *crtc);
+
 bool vmw_vkms_get_vblank_timestamp(struct drm_crtc *crtc,
 				   int *max_error,
 				   ktime_t *vblank_time,
 				   bool in_vblank_irq);
 int vmw_vkms_enable_vblank(struct drm_crtc *crtc);
 void vmw_vkms_disable_vblank(struct drm_crtc *crtc);
+
+void vmw_vkms_crtc_init(struct drm_crtc *crtc);
+void vmw_vkms_crtc_cleanup(struct drm_crtc *crtc);
+void  vmw_vkms_crtc_atomic_begin(struct drm_crtc *crtc,
+				 struct drm_atomic_state *state);
 void vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state);
-enum hrtimer_restart vmw_vkms_vblank_simulate(struct hrtimer *timer);
 void vmw_vkms_crtc_atomic_enable(struct drm_crtc *crtc,
 				 struct drm_atomic_state *state);
 void vmw_vkms_crtc_atomic_disable(struct drm_crtc *crtc,
 				  struct drm_atomic_state *state);
 
+const char *const *vmw_vkms_get_crc_sources(struct drm_crtc *crtc,
+					    size_t *count);
+int vmw_vkms_verify_crc_source(struct drm_crtc *crtc,
+			       const char *src_name,
+			       size_t *values_cnt);
+int vmw_vkms_set_crc_source(struct drm_crtc *crtc,
+			    const char *src_name);
+void vmw_vkms_set_crc_surface(struct drm_crtc *crtc,
+			      struct vmw_surface *surf);
+
 #endif
-- 
cgit 


From ef4a9204d594fe959cdbc7418273caf4001535c8 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:29 -0400
Subject: drm/bridge: anx7625: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 269332997a16 ("drm/bridge: anx7625: Return -EPROBE_DEFER if the dsi host was not found")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-1-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 9d96d28d6fe8..02bf45005307 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -2066,10 +2066,8 @@ static int anx7625_setup_dsi_device(struct anx7625_data *ctx)
 	};
 
 	host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node);
-	if (!host) {
-		DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
-		return -EPROBE_DEFER;
-	}
+	if (!host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "fail to find dsi host.\n");
 
 	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From 275fafe58faa7fdb10fa245412696ecef676aac5 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:30 -0400
Subject: drm/bridge: icn6211: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 8dde6f7452a1 ("drm: bridge: icn6211: Add I2C configuration support")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-2-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/chipone-icn6211.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index 82d23e4df09e..ff3284b6b1a3 100644
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -563,10 +563,8 @@ static int chipone_dsi_host_attach(struct chipone *icn)
 
 	host = of_find_mipi_dsi_host_by_node(host_node);
 	of_node_put(host_node);
-	if (!host) {
-		dev_err(dev, "failed to find dsi host\n");
-		return -EPROBE_DEFER;
-	}
+	if (!host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
 
 	dsi = mipi_dsi_device_register_full(host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From b3b4695ff47c4964d4ccb930890c9ffd8e455e20 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:31 -0400
Subject: drm/bridge: lt8912b: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-3-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index 4b2ae27f0a57..1a9defa15663 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -494,10 +494,8 @@ static int lt8912_attach_dsi(struct lt8912 *lt)
 						 };
 
 	host = of_find_mipi_dsi_host_by_node(lt->host_node);
-	if (!host) {
-		dev_err(dev, "failed to find dsi host\n");
-		return -EPROBE_DEFER;
-	}
+	if (!host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
 
 	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From cd0a2c6a081ff67007323725b9ff07d9934b1ed8 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:32 -0400
Subject: drm/bridge: lt9611: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-4-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/lontium-lt9611.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index a9c7e2b07ea1..b99fe87ec738 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -761,10 +761,8 @@ static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
 	int ret;
 
 	host = of_find_mipi_dsi_host_by_node(dsi_node);
-	if (!host) {
-		dev_err(lt9611->dev, "failed to find dsi host\n");
-		return ERR_PTR(-EPROBE_DEFER);
-	}
+	if (!host)
+		return ERR_PTR(dev_err_probe(lt9611->dev, -EPROBE_DEFER, "failed to find dsi host\n"));
 
 	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From 6d9e877cde7e9b516a9a99751b8222c87557436d Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:33 -0400
Subject: drm/bridge: lt9611uxc: Don't log an error when DSI host can't be
 found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-5-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index f4f593ad8f79..ab702471f3ab 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -266,10 +266,8 @@ static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
 	int ret;
 
 	host = of_find_mipi_dsi_host_by_node(dsi_node);
-	if (!host) {
-		dev_err(dev, "failed to find dsi host\n");
-		return ERR_PTR(-EPROBE_DEFER);
-	}
+	if (!host)
+		return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n"));
 
 	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From 272377aa0e3dddeec3f568c8bb9d12c7a79d8ef5 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:34 -0400
Subject: drm/bridge: tc358775: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: b26975593b17 ("display/drm/bridge: TC358775 DSI/LVDS driver")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-6-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/tc358775.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
index 90a89d70d832..fea4f00a20f8 100644
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -610,10 +610,8 @@ static int tc_attach_host(struct tc_data *tc)
 						};
 
 	host = of_find_mipi_dsi_host_by_node(tc->host_node);
-	if (!host) {
-		dev_err(dev, "failed to find dsi host\n");
-		return -EPROBE_DEFER;
-	}
+	if (!host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
 
 	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 	if (IS_ERR(dsi)) {
-- 
cgit 


From 24f4f575214de776539d346b99b8717bffa8ebba Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:35 -0400
Subject: drm/bridge: dpc3433: Don't log an error when DSI host can't be found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Also move the "failed to attach" error message so that it's only printed
when the devm_mipi_dsi_attach() call fails.

Fixes: 6352cd451ddb ("drm: bridge: Add TI DLPC3433 DSI to DMD bridge")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-7-619a28148e5c@collabora.com
---
 drivers/gpu/drm/bridge/ti-dlpc3433.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/ti-dlpc3433.c b/drivers/gpu/drm/bridge/ti-dlpc3433.c
index ca3348109bcd..6b559e071301 100644
--- a/drivers/gpu/drm/bridge/ti-dlpc3433.c
+++ b/drivers/gpu/drm/bridge/ti-dlpc3433.c
@@ -319,12 +319,11 @@ static int dlpc_host_attach(struct dlpc *dlpc)
 		.channel = 0,
 		.node = NULL,
 	};
+	int ret;
 
 	host = of_find_mipi_dsi_host_by_node(dlpc->host_node);
-	if (!host) {
-		DRM_DEV_ERROR(dev, "failed to find dsi host\n");
-		return -EPROBE_DEFER;
-	}
+	if (!host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
 
 	dlpc->dsi = mipi_dsi_device_register_full(host, &info);
 	if (IS_ERR(dlpc->dsi)) {
@@ -336,7 +335,11 @@ static int dlpc_host_attach(struct dlpc *dlpc)
 	dlpc->dsi->format = MIPI_DSI_FMT_RGB565;
 	dlpc->dsi->lanes = dlpc->dsi_lanes;
 
-	return devm_mipi_dsi_attach(dev, dlpc->dsi);
+	ret = devm_mipi_dsi_attach(dev, dlpc->dsi);
+	if (ret)
+		DRM_DEV_ERROR(dev, "failed to attach dsi host\n");
+
+	return ret;
 }
 
 static int dlpc3433_probe(struct i2c_client *client)
@@ -367,10 +370,8 @@ static int dlpc3433_probe(struct i2c_client *client)
 	drm_bridge_add(&dlpc->bridge);
 
 	ret = dlpc_host_attach(dlpc);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "failed to attach dsi host\n");
+	if (ret)
 		goto err_remove_bridge;
-	}
 
 	return 0;
 
-- 
cgit 


From 5ff5505b9a2d827cae3f95dceba258c963138175 Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:36 -0400
Subject: drm/panel: novatek-nt35950: Don't log an error when DSI host can't be
 found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 623a3531e9cf ("drm/panel: Add driver for Novatek NT35950 DSI DriverIC panels")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-8-619a28148e5c@collabora.com
---
 drivers/gpu/drm/panel/panel-novatek-nt35950.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
index 648ce9201426..028fdac293f7 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
@@ -556,10 +556,8 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
 		}
 		dsi_r_host = of_find_mipi_dsi_host_by_node(dsi_r);
 		of_node_put(dsi_r);
-		if (!dsi_r_host) {
-			dev_err(dev, "Cannot get secondary DSI host\n");
-			return -EPROBE_DEFER;
-		}
+		if (!dsi_r_host)
+			return dev_err_probe(dev, -EPROBE_DEFER, "Cannot get secondary DSI host\n");
 
 		nt->dsi[1] = mipi_dsi_device_register_full(dsi_r_host, info);
 		if (!nt->dsi[1]) {
-- 
cgit 


From c1e4d3a6de486ff896f2a90e2dacc30ac290828f Mon Sep 17 00:00:00 2001
From: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Date: Mon, 15 Apr 2024 17:49:37 -0400
Subject: drm/panel: truly-nt35597: Don't log an error when DSI host can't be
 found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-9-619a28148e5c@collabora.com
---
 drivers/gpu/drm/panel/panel-truly-nt35597.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/panel-truly-nt35597.c b/drivers/gpu/drm/panel/panel-truly-nt35597.c
index b73448cf349d..d447db912a61 100644
--- a/drivers/gpu/drm/panel/panel-truly-nt35597.c
+++ b/drivers/gpu/drm/panel/panel-truly-nt35597.c
@@ -550,10 +550,8 @@ static int truly_nt35597_probe(struct mipi_dsi_device *dsi)
 
 	dsi1_host = of_find_mipi_dsi_host_by_node(dsi1);
 	of_node_put(dsi1);
-	if (!dsi1_host) {
-		dev_err(dev, "failed to find dsi host\n");
-		return -EPROBE_DEFER;
-	}
+	if (!dsi1_host)
+		return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
 
 	/* register the second DSI device */
 	dsi1_device = mipi_dsi_device_register_full(dsi1_host, &info);
-- 
cgit 


From a665b4e60369867cddf50f37f16169a3e2f434ad Mon Sep 17 00:00:00 2001
From: Hsin-Te Yuan <yuanhsinte@chromium.org>
Date: Tue, 16 Apr 2024 07:21:35 +0000
Subject: drm/bridge: anx7625: Update audio status while detecting

Previously, the audio status was not updated during detection, leading
to a persistent audio despite hot plugging events. To resolve this
issue, update the audio status during detection.

Fixes: 566fef1226c1 ("drm/bridge: anx7625: add HDMI audio function")
Signed-off-by: Hsin-Te Yuan <yuanhsinte@chromium.org>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240416-anx7625-v3-1-f916ae31bdd7@chromium.org
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 02bf45005307..59e9ad349969 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -2469,15 +2469,22 @@ static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge,
 	mutex_unlock(&ctx->aux_lock);
 }
 
+static void
+anx7625_audio_update_connector_status(struct anx7625_data *ctx,
+				      enum drm_connector_status status);
+
 static enum drm_connector_status
 anx7625_bridge_detect(struct drm_bridge *bridge)
 {
 	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
 	struct device *dev = ctx->dev;
+	enum drm_connector_status status;
 
 	DRM_DEV_DEBUG_DRIVER(dev, "drm bridge detect\n");
 
-	return anx7625_sink_detect(ctx);
+	status = anx7625_sink_detect(ctx);
+	anx7625_audio_update_connector_status(ctx, status);
+	return status;
 }
 
 static const struct drm_edid *anx7625_bridge_edid_read(struct drm_bridge *bridge,
-- 
cgit 


From 5289ed190643160193f8462a6b087acf624955a3 Mon Sep 17 00:00:00 2001
From: Jocelyn Falempe <jfalempe@redhat.com>
Date: Tue, 16 Apr 2024 11:05:51 +0200
Subject: drm/fb_dma: Fix parameter name in htmldocs

The parameter name is 'sb' and not 'drm_scanout_buffer'.
It fixes the following warnings:

drivers/gpu/drm/drm_fb_dma_helper.c:166: warning: Excess function parameter 'drm_scanout_buffer' description in 'drm_fb_dma_get_scanout_buffer'
drivers/gpu/drm/drm_fb_dma_helper.c:166: warning: Function parameter or struct member 'sb' not described in 'drm_fb_dma_get_scanout_buffer'
drivers/gpu/drm/drm_fb_dma_helper.c:166: warning: Excess function parameter 'drm_scanout_buffer' description in 'drm_fb_dma_get_scanout_buffer'

Fixes: 879b3b6511fe ("drm/fb_dma: Add generic get_scanout_buffer() for drm_panic")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240416090601.237286-1-jfalempe@redhat.com
---
 drivers/gpu/drm/drm_fb_dma_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_fb_dma_helper.c b/drivers/gpu/drm/drm_fb_dma_helper.c
index c79b5078303f..96e5ab960f12 100644
--- a/drivers/gpu/drm/drm_fb_dma_helper.c
+++ b/drivers/gpu/drm/drm_fb_dma_helper.c
@@ -153,7 +153,7 @@ EXPORT_SYMBOL_GPL(drm_fb_dma_sync_non_coherent);
 /**
  * drm_fb_dma_get_scanout_buffer - Provide a scanout buffer in case of panic
  * @plane: DRM primary plane
- * @drm_scanout_buffer: scanout buffer for the panic handler
+ * @sb: scanout buffer for the panic handler
  * Returns: 0 or negative error code
  *
  * Generic get_scanout_buffer() implementation, for drivers that uses the
-- 
cgit 


From 44e030d8a5a1be503301a0f095416c5ebb93c9e6 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:19:54 +0300
Subject: drm/displayid: move drm_displayid.h to drm_displayd_internal.h

There are no exported symbols for displayid, and it's all internal
interfaces. Move the header to drivers/gpu/drm/drm_displayd_internal.h.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/220713d4e3cc364ac103ba689065ae96e075f1fa.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_displayid.c          |   3 +-
 drivers/gpu/drm/drm_displayid_internal.h | 171 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_edid.c               |   2 +-
 3 files changed, 174 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_displayid_internal.h

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index 9edc111be7ee..f72a893c7deb 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -3,10 +3,11 @@
  * Copyright © 2021 Intel Corporation
  */
 
-#include <drm/drm_displayid.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
 
+#include "drm_displayid_internal.h"
+
 static const struct displayid_header *
 displayid_get_header(const u8 *displayid, int length, int index)
 {
diff --git a/drivers/gpu/drm/drm_displayid_internal.h b/drivers/gpu/drm/drm_displayid_internal.h
new file mode 100644
index 000000000000..56fd3bb0a779
--- /dev/null
+++ b/drivers/gpu/drm/drm_displayid_internal.h
@@ -0,0 +1,171 @@
+/*
+ * Copyright © 2014 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __DRM_DISPLAYID_INTERNAL_H__
+#define __DRM_DISPLAYID_INTERNAL_H__
+
+#include <linux/types.h>
+#include <linux/bits.h>
+
+struct drm_edid;
+
+#define VESA_IEEE_OUI				0x3a0292
+
+/* DisplayID Structure versions */
+#define DISPLAY_ID_STRUCTURE_VER_12		0x12
+#define DISPLAY_ID_STRUCTURE_VER_20		0x20
+
+/* DisplayID Structure v1r2 Data Blocks */
+#define DATA_BLOCK_PRODUCT_ID			0x00
+#define DATA_BLOCK_DISPLAY_PARAMETERS		0x01
+#define DATA_BLOCK_COLOR_CHARACTERISTICS	0x02
+#define DATA_BLOCK_TYPE_1_DETAILED_TIMING	0x03
+#define DATA_BLOCK_TYPE_2_DETAILED_TIMING	0x04
+#define DATA_BLOCK_TYPE_3_SHORT_TIMING		0x05
+#define DATA_BLOCK_TYPE_4_DMT_TIMING		0x06
+#define DATA_BLOCK_VESA_TIMING			0x07
+#define DATA_BLOCK_CEA_TIMING			0x08
+#define DATA_BLOCK_VIDEO_TIMING_RANGE		0x09
+#define DATA_BLOCK_PRODUCT_SERIAL_NUMBER	0x0a
+#define DATA_BLOCK_GP_ASCII_STRING		0x0b
+#define DATA_BLOCK_DISPLAY_DEVICE_DATA		0x0c
+#define DATA_BLOCK_INTERFACE_POWER_SEQUENCING	0x0d
+#define DATA_BLOCK_TRANSFER_CHARACTERISTICS	0x0e
+#define DATA_BLOCK_DISPLAY_INTERFACE		0x0f
+#define DATA_BLOCK_STEREO_DISPLAY_INTERFACE	0x10
+#define DATA_BLOCK_TILED_DISPLAY		0x12
+#define DATA_BLOCK_VENDOR_SPECIFIC		0x7f
+#define DATA_BLOCK_CTA				0x81
+
+/* DisplayID Structure v2r0 Data Blocks */
+#define DATA_BLOCK_2_PRODUCT_ID			0x20
+#define DATA_BLOCK_2_DISPLAY_PARAMETERS		0x21
+#define DATA_BLOCK_2_TYPE_7_DETAILED_TIMING	0x22
+#define DATA_BLOCK_2_TYPE_8_ENUMERATED_TIMING	0x23
+#define DATA_BLOCK_2_TYPE_9_FORMULA_TIMING	0x24
+#define DATA_BLOCK_2_DYNAMIC_VIDEO_TIMING	0x25
+#define DATA_BLOCK_2_DISPLAY_INTERFACE_FEATURES	0x26
+#define DATA_BLOCK_2_STEREO_DISPLAY_INTERFACE	0x27
+#define DATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY	0x28
+#define DATA_BLOCK_2_CONTAINER_ID		0x29
+#define DATA_BLOCK_2_VENDOR_SPECIFIC		0x7e
+#define DATA_BLOCK_2_CTA_DISPLAY_ID		0x81
+
+/* DisplayID Structure v1r2 Product Type */
+#define PRODUCT_TYPE_EXTENSION			0
+#define PRODUCT_TYPE_TEST			1
+#define PRODUCT_TYPE_PANEL			2
+#define PRODUCT_TYPE_MONITOR			3
+#define PRODUCT_TYPE_TV				4
+#define PRODUCT_TYPE_REPEATER			5
+#define PRODUCT_TYPE_DIRECT_DRIVE		6
+
+/* DisplayID Structure v2r0 Display Product Primary Use Case (~Product Type) */
+#define PRIMARY_USE_EXTENSION			0
+#define PRIMARY_USE_TEST			1
+#define PRIMARY_USE_GENERIC			2
+#define PRIMARY_USE_TV				3
+#define PRIMARY_USE_DESKTOP_PRODUCTIVITY	4
+#define PRIMARY_USE_DESKTOP_GAMING		5
+#define PRIMARY_USE_PRESENTATION		6
+#define PRIMARY_USE_HEAD_MOUNTED_VR		7
+#define PRIMARY_USE_HEAD_MOUNTED_AR		8
+
+struct displayid_header {
+	u8 rev;
+	u8 bytes;
+	u8 prod_id;
+	u8 ext_count;
+} __packed;
+
+struct displayid_block {
+	u8 tag;
+	u8 rev;
+	u8 num_bytes;
+} __packed;
+
+struct displayid_tiled_block {
+	struct displayid_block base;
+	u8 tile_cap;
+	u8 topo[3];
+	u8 tile_size[4];
+	u8 tile_pixel_bezel[5];
+	u8 topology_id[8];
+} __packed;
+
+struct displayid_detailed_timings_1 {
+	u8 pixel_clock[3];
+	u8 flags;
+	u8 hactive[2];
+	u8 hblank[2];
+	u8 hsync[2];
+	u8 hsw[2];
+	u8 vactive[2];
+	u8 vblank[2];
+	u8 vsync[2];
+	u8 vsw[2];
+} __packed;
+
+struct displayid_detailed_timing_block {
+	struct displayid_block base;
+	struct displayid_detailed_timings_1 timings[];
+};
+
+#define DISPLAYID_VESA_MSO_OVERLAP	GENMASK(3, 0)
+#define DISPLAYID_VESA_MSO_MODE		GENMASK(6, 5)
+
+struct displayid_vesa_vendor_specific_block {
+	struct displayid_block base;
+	u8 oui[3];
+	u8 data_structure_type;
+	u8 mso;
+} __packed;
+
+/*
+ * DisplayID iteration.
+ *
+ * Do not access directly, this is private.
+ */
+struct displayid_iter {
+	const struct drm_edid *drm_edid;
+
+	const u8 *section;
+	int length;
+	int idx;
+	int ext_index;
+
+	u8 version;
+	u8 primary_use;
+};
+
+void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
+			       struct displayid_iter *iter);
+const struct displayid_block *
+__displayid_iter_next(struct displayid_iter *iter);
+#define displayid_iter_for_each(__block, __iter) \
+	while (((__block) = __displayid_iter_next(__iter)))
+void displayid_iter_end(struct displayid_iter *iter);
+
+u8 displayid_version(const struct displayid_iter *iter);
+u8 displayid_primary_use(const struct displayid_iter *iter);
+
+#endif
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1400722ae3fe..c4f799059522 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -40,7 +40,6 @@
 #include <linux/slab.h>
 #include <linux/vga_switcheroo.h>
 
-#include <drm/drm_displayid.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_eld.h>
@@ -48,6 +47,7 @@
 #include <drm/drm_print.h>
 
 #include "drm_crtc_internal.h"
+#include "drm_displayid_internal.h"
 #include "drm_internal.h"
 
 static int oui(u8 first, u8 second, u8 third)
-- 
cgit 


From 4e765920eeb91861a42cbc89036dedd3f7d27eef Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:19:55 +0300
Subject: drm/edid: move all internal declarations to drm_crtc_internal.h

The declarations for internal EDID functions are a bit scattered. Put
them all in drm_crtc_internal.h.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/9ae137ea51f9cc2ccb3899b0acda553e6a8ce2db.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_crtc_internal.h | 6 ++++++
 drivers/gpu/drm/drm_displayid.c     | 1 +
 drivers/gpu/drm/drm_eld.c           | 4 +++-
 drivers/gpu/drm/drm_internal.h      | 5 -----
 4 files changed, 10 insertions(+), 6 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index 0c693229a1c9..2256893d7d67 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -43,12 +43,14 @@ enum drm_color_range;
 enum drm_connector_force;
 enum drm_mode_status;
 
+struct cea_sad;
 struct drm_atomic_state;
 struct drm_bridge;
 struct drm_connector;
 struct drm_crtc;
 struct drm_device;
 struct drm_display_mode;
+struct drm_edid;
 struct drm_file;
 struct drm_framebuffer;
 struct drm_mode_create_dumb;
@@ -297,6 +299,10 @@ void drm_mode_fixup_1366x768(struct drm_display_mode *mode);
 int drm_edid_override_show(struct drm_connector *connector, struct seq_file *m);
 int drm_edid_override_set(struct drm_connector *connector, const void *edid, size_t size);
 int drm_edid_override_reset(struct drm_connector *connector);
+const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
+				  int ext_id, int *ext_index);
+void drm_edid_cta_sad_get(const struct cea_sad *cta_sad, u8 *sad);
+void drm_edid_cta_sad_set(struct cea_sad *cta_sad, const u8 *sad);
 
 /* drm_edid_load.c */
 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index f72a893c7deb..f800dc0906d5 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -6,6 +6,7 @@
 #include <drm/drm_edid.h>
 #include <drm/drm_print.h>
 
+#include "drm_crtc_internal.h"
 #include "drm_displayid_internal.h"
 
 static const struct displayid_header *
diff --git a/drivers/gpu/drm/drm_eld.c b/drivers/gpu/drm/drm_eld.c
index 5177991aa272..c0428d07de53 100644
--- a/drivers/gpu/drm/drm_eld.c
+++ b/drivers/gpu/drm/drm_eld.c
@@ -3,10 +3,12 @@
  * Copyright © 2023 Intel Corporation
  */
 
+#include <linux/export.h>
+
 #include <drm/drm_edid.h>
 #include <drm/drm_eld.h>
 
-#include "drm_internal.h"
+#include "drm_crtc_internal.h"
 
 /**
  * drm_eld_sad_get - get SAD from ELD to struct cea_sad
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 2215baef9a3e..690505a1f7a5 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -35,7 +35,6 @@
 
 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
 
-struct cea_sad;
 struct dentry;
 struct dma_buf;
 struct iosys_map;
@@ -278,8 +277,4 @@ void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent,
 				const struct drm_framebuffer *fb);
 void drm_framebuffer_debugfs_init(struct drm_device *dev);
 
-/* drm_edid.c */
-void drm_edid_cta_sad_get(const struct cea_sad *cta_sad, u8 *sad);
-void drm_edid_cta_sad_set(struct cea_sad *cta_sad, const u8 *sad);
-
 #endif /* __DRM_INTERNAL_H__ */
-- 
cgit 


From 64ac4a14e961d693e21dc7bc6b711a44400b4d34 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:19:57 +0300
Subject: drm/edid: rename drm_find_edid_extension() to
 drm_edid_find_extension()

Follow the drm_edid_ naming convention.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/b7a2c2509409de02bbd751541206586424a34725.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_crtc_internal.h | 2 +-
 drivers/gpu/drm/drm_displayid.c     | 3 ++-
 drivers/gpu/drm/drm_edid.c          | 4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index 2256893d7d67..25aaae937ceb 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -299,7 +299,7 @@ void drm_mode_fixup_1366x768(struct drm_display_mode *mode);
 int drm_edid_override_show(struct drm_connector *connector, struct seq_file *m);
 int drm_edid_override_set(struct drm_connector *connector, const void *edid, size_t size);
 int drm_edid_override_reset(struct drm_connector *connector);
-const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
+const u8 *drm_edid_find_extension(const struct drm_edid *drm_edid,
 				  int ext_id, int *ext_index);
 void drm_edid_cta_sad_get(const struct cea_sad *cta_sad, u8 *sad);
 void drm_edid_cta_sad_set(struct cea_sad *cta_sad, const u8 *sad);
diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index f800dc0906d5..9d01d762801f 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -55,9 +55,10 @@ static const u8 *drm_find_displayid_extension(const struct drm_edid *drm_edid,
 					      int *length, int *idx,
 					      int *ext_index)
 {
-	const u8 *displayid = drm_find_edid_extension(drm_edid, DISPLAYID_EXT, ext_index);
 	const struct displayid_header *base;
+	const u8 *displayid;
 
+	displayid = drm_edid_find_extension(drm_edid, DISPLAYID_EXT, ext_index);
 	if (!displayid)
 		return NULL;
 
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index c4f799059522..c29f31dcc818 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4200,7 +4200,7 @@ static int add_detailed_modes(struct drm_connector *connector,
  *
  * FIXME: Prefer not returning pointers to raw EDID data.
  */
-const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
+const u8 *drm_edid_find_extension(const struct drm_edid *drm_edid,
 				  int ext_id, int *ext_index)
 {
 	const u8 *edid_ext = NULL;
@@ -4234,7 +4234,7 @@ static bool drm_edid_has_cta_extension(const struct drm_edid *drm_edid)
 	bool found = false;
 
 	/* Look for a top level CEA extension block */
-	if (drm_find_edid_extension(drm_edid, CEA_EXT, &ext_index))
+	if (drm_edid_find_extension(drm_edid, CEA_EXT, &ext_index))
 		return true;
 
 	/* CEA blocks can also be found embedded in a DisplayID block */
-- 
cgit 


From 0ac57ca35974acc1633806f7d20a52b8a0e23a88 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:19:58 +0300
Subject: drm/edid: avoid drm_edid_find_extension() internally

Prefer the EDID iterators over drm_edid_find_extension() in
drm_edid_has_cta_extension(), even if this leads to more code. The key
is to use the same patterns as much as possible.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/9fa366147b06a28304527be48f1b363c3484c8a3.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index c29f31dcc818..4b3ad42a8f95 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4230,11 +4230,21 @@ static bool drm_edid_has_cta_extension(const struct drm_edid *drm_edid)
 {
 	const struct displayid_block *block;
 	struct displayid_iter iter;
-	int ext_index = 0;
+	struct drm_edid_iter edid_iter;
+	const u8 *ext;
 	bool found = false;
 
 	/* Look for a top level CEA extension block */
-	if (drm_edid_find_extension(drm_edid, CEA_EXT, &ext_index))
+	drm_edid_iter_begin(drm_edid, &edid_iter);
+	drm_edid_iter_for_each(ext, &edid_iter) {
+		if (ext[0] == CEA_EXT) {
+			found = true;
+			break;
+		}
+	}
+	drm_edid_iter_end(&edid_iter);
+
+	if (found)
 		return true;
 
 	/* CEA blocks can also be found embedded in a DisplayID block */
-- 
cgit 


From d7bf5fcc2f8212b91cd33d91415f6a887761c32a Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:19:59 +0300
Subject: drm/edid: make drm_edid_are_equal() static

drm_edid_are_equal() is only used within drm_edid.c. Make it static. Do
not encourage more uses of struct edid.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/aa79be9a5d0b08c71b82b86b5a8ff0f332e13c6a.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 4b3ad42a8f95..463fbad85d90 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1827,7 +1827,7 @@ static bool edid_block_is_zero(const void *edid)
  * This helper can be used during probing to determine if
  * edid had changed.
  */
-bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2)
+static bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2)
 {
 	int edid1_len, edid2_len;
 	bool edid1_present = edid1 != NULL;
@@ -1849,7 +1849,6 @@ bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2)
 
 	return true;
 }
-EXPORT_SYMBOL(drm_edid_are_equal);
 
 enum edid_block_status {
 	EDID_BLOCK_OK = 0,
-- 
cgit 


From 00c7a01085311f3230aaa5caac93bc49328129af Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 16 Apr 2024 12:20:00 +0300
Subject: drm/edid: make drm_edid_are_equal() more convenient for its single
 user

Repurpose drm_edid_are_equal() to be more helpful for its single user,
and rename drm_edid_eq(). Functionally deduce the length from the blob
size, not the blob data, making it more robust against any errors.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/1011a285d30babce3aabd8218abb7ece7dcf58a2.1713259151.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 41 +++++++++++++++--------------------------
 1 file changed, 15 insertions(+), 26 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 463fbad85d90..513590931cc5 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1820,30 +1820,20 @@ static bool edid_block_is_zero(const void *edid)
 	return !memchr_inv(edid, 0, EDID_LENGTH);
 }
 
-/**
- * drm_edid_are_equal - compare two edid blobs.
- * @edid1: pointer to first blob
- * @edid2: pointer to second blob
- * This helper can be used during probing to determine if
- * edid had changed.
- */
-static bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2)
+static bool drm_edid_eq(const struct drm_edid *drm_edid,
+			const void *raw_edid, size_t raw_edid_size)
 {
-	int edid1_len, edid2_len;
-	bool edid1_present = edid1 != NULL;
-	bool edid2_present = edid2 != NULL;
+	bool edid1_present = drm_edid && drm_edid->edid && drm_edid->size;
+	bool edid2_present = raw_edid && raw_edid_size;
 
 	if (edid1_present != edid2_present)
 		return false;
 
-	if (edid1) {
-		edid1_len = edid_size(edid1);
-		edid2_len = edid_size(edid2);
-
-		if (edid1_len != edid2_len)
+	if (edid1_present) {
+		if (drm_edid->size != raw_edid_size)
 			return false;
 
-		if (memcmp(edid1, edid2, edid1_len))
+		if (memcmp(drm_edid->edid, raw_edid, drm_edid->size))
 			return false;
 	}
 
@@ -6936,15 +6926,14 @@ static int _drm_edid_connector_property_update(struct drm_connector *connector,
 	int ret;
 
 	if (connector->edid_blob_ptr) {
-		const struct edid *old_edid = connector->edid_blob_ptr->data;
-
-		if (old_edid) {
-			if (!drm_edid_are_equal(drm_edid ? drm_edid->edid : NULL, old_edid)) {
-				connector->epoch_counter++;
-				drm_dbg_kms(dev, "[CONNECTOR:%d:%s] EDID changed, epoch counter %llu\n",
-					    connector->base.id, connector->name,
-					    connector->epoch_counter);
-			}
+		const void *old_edid = connector->edid_blob_ptr->data;
+		size_t old_edid_size = connector->edid_blob_ptr->length;
+
+		if (old_edid && !drm_edid_eq(drm_edid, old_edid, old_edid_size)) {
+			connector->epoch_counter++;
+			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] EDID changed, epoch counter %llu\n",
+				    connector->base.id, connector->name,
+				    connector->epoch_counter);
 		}
 	}
 
-- 
cgit 


From 11ac72d033b9f577e8ba0c7a41d1c312bb232593 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Thu, 28 Mar 2024 11:27:36 +0100
Subject: drm/panel: simple: Add missing Innolux G121X1-L03 format, flags,
 connector

The .bpc = 6 implies .bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG ,
add the missing bus_format. Add missing connector type and bus_flags
as well.

Documentation [1] 1.4 GENERAL SPECIFICATI0NS indicates this panel is
capable of both RGB 18bit/24bit panel, the current configuration uses
18bit mode, .bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG , .bpc = 6.

Support for the 24bit mode would require another entry in panel-simple
with .bus_format = MEDIA_BUS_FMT_RGB666_1X7X4_SPWG and .bpc = 8, which
is out of scope of this fix.

[1] https://www.distec.de/fileadmin/pdf/produkte/TFT-Displays/Innolux/G121X1-L03_Datasheet.pdf

Fixes: f8fa17ba812b ("drm/panel: simple: Add support for Innolux G121X1-L03")
Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240328102746.17868-2-marex@denx.de
---
 drivers/gpu/drm/panel/panel-simple.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 7215cf767898..dce798a3f291 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2617,6 +2617,9 @@ static const struct panel_desc innolux_g121x1_l03 = {
 		.unprepare = 200,
 		.disable = 400,
 	},
+	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
 static const struct display_timing innolux_g156hce_l01_timings = {
-- 
cgit 


From 90c53f2bb997f1e1e47da573a3df756264aface3 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Thu, 28 Mar 2024 11:27:37 +0100
Subject: drm/panel: simple: Convert Innolux G121X1-L03 to display_timing

Use display_timing instead of drm_display_mode to define a range of
possible display timings supported by this panel. This makes the panel
support more flexible and improves compatibility. No functional change
is expected.

The settings are picked from documentation [1] section 6.1 INPUT SIGNAL
TIMING SPECIFICATIONS.

[1] https://www.distec.de/fileadmin/pdf/produkte/TFT-Displays/Innolux/G121X1-L03_Datasheet.pdf

Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240328102746.17868-3-marex@denx.de
---
 drivers/gpu/drm/panel/panel-simple.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index dce798a3f291..366d81932882 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2591,22 +2591,22 @@ static const struct panel_desc innolux_g121i1_l01 = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
-static const struct drm_display_mode innolux_g121x1_l03_mode = {
-	.clock = 65000,
-	.hdisplay = 1024,
-	.hsync_start = 1024 + 0,
-	.hsync_end = 1024 + 1,
-	.htotal = 1024 + 0 + 1 + 320,
-	.vdisplay = 768,
-	.vsync_start = 768 + 38,
-	.vsync_end = 768 + 38 + 1,
-	.vtotal = 768 + 38 + 1 + 0,
-	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+static const struct display_timing innolux_g121x1_l03_timings = {
+	.pixelclock = { 57500000, 64900000, 74400000 },
+	.hactive = { 1024, 1024, 1024 },
+	.hfront_porch = { 90, 140, 190 },
+	.hback_porch = { 90, 140, 190 },
+	.hsync_len = { 36, 40, 60 },
+	.vactive = { 768, 768, 768 },
+	.vfront_porch = { 2, 15, 30 },
+	.vback_porch = { 2, 15, 30 },
+	.vsync_len = { 2, 8, 20 },
+	.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
 };
 
 static const struct panel_desc innolux_g121x1_l03 = {
-	.modes = &innolux_g121x1_l03_mode,
-	.num_modes = 1,
+	.timings = &innolux_g121x1_l03_timings,
+	.num_timings = 1,
 	.bpc = 6,
 	.size = {
 		.width = 246,
-- 
cgit 


From f7ad2ce5fd89ab5d146da8f486a310746df5dc9e Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Thu, 28 Mar 2024 11:27:38 +0100
Subject: drm/panel: simple: Add Innolux G121XCE-L01 LVDS display support

G121XCE-L01 is a Color Active Matrix Liquid Crystal Display composed of
a TFT LCD panel, a driver circuit, and LED backlight system. The screen
format is intended to support the 4:3, 1024(H) x 768(V) screen and either
262k/16.7M colors (RGB 6-bits or 8-bits) with LED backlight driver circuit.
All input signals are LVDS interface compatible.

Documentation [1] and [2] indicate that G121X1-L03 and G121XCE-L01 are
effectively identical panels, use the former as RGB 6-bits variant and
add the later as RGB 8-bits variant.

[1] https://www.distec.de/fileadmin/pdf/produkte/TFT-Displays/Innolux/G121X1-L03_Datasheet.pdf
[2] https://www.distec.de/fileadmin/pdf/produkte/TFT-Displays/Innolux/G121XCE-L01_Datasheet.pdf

Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240328102746.17868-4-marex@denx.de
---
 drivers/gpu/drm/panel/panel-simple.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 366d81932882..50c855476d78 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2622,6 +2622,24 @@ static const struct panel_desc innolux_g121x1_l03 = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct panel_desc innolux_g121xce_l01 = {
+	.timings = &innolux_g121x1_l03_timings,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 246,
+		.height = 185,
+	},
+	.delay = {
+		.enable = 200,
+		.unprepare = 200,
+		.disable = 400,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
+};
+
 static const struct display_timing innolux_g156hce_l01_timings = {
 	.pixelclock = { 120000000, 141860000, 150000000 },
 	.hactive = { 1920, 1920, 1920 },
@@ -4595,6 +4613,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "innolux,g121x1-l03",
 		.data = &innolux_g121x1_l03,
+	}, {
+		.compatible = "innolux,g121xce-l01",
+		.data = &innolux_g121xce_l01,
 	}, {
 		.compatible = "innolux,g156hce-l01",
 		.data = &innolux_g156hce_l01,
-- 
cgit 


From d12e36494dc2bf221867ecbfa7059e1e231f6ac2 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 8 Apr 2024 22:06:07 +0300
Subject: drm/vblank: Introduce drm_crtc_vblank_crtc()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Make life easier by providing a function that hands
out the correct drm_vblank_crtc for a given a drm_crtc.

Also abstract the lower level internals of the vblank
code in a similar fashion.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408190611.24914-1-ville.syrjala@linux.intel.com
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/drm_vblank.c      | 58 +++++++++++++++++++++++----------------
 drivers/gpu/drm/drm_vblank_work.c |  2 +-
 2 files changed, 35 insertions(+), 25 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 702a12bc93bd..cc3571e25a9a 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -166,11 +166,24 @@ module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600)
 MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)");
 MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]");
 
+static struct drm_vblank_crtc *
+drm_vblank_crtc(struct drm_device *dev, unsigned int pipe)
+{
+	return &dev->vblank[pipe];
+}
+
+struct drm_vblank_crtc *
+drm_crtc_vblank_crtc(struct drm_crtc *crtc)
+{
+	return drm_vblank_crtc(crtc->dev, drm_crtc_index(crtc));
+}
+EXPORT_SYMBOL(drm_crtc_vblank_crtc);
+
 static void store_vblank(struct drm_device *dev, unsigned int pipe,
 			 u32 vblank_count_inc,
 			 ktime_t t_vblank, u32 last)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 
 	assert_spin_locked(&dev->vblank_time_lock);
 
@@ -184,7 +197,7 @@ static void store_vblank(struct drm_device *dev, unsigned int pipe,
 
 static u32 drm_max_vblank_count(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 
 	return vblank->max_vblank_count ?: dev->max_vblank_count;
 }
@@ -273,7 +286,7 @@ static void drm_reset_vblank_timestamp(struct drm_device *dev, unsigned int pipe
 static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe,
 				    bool in_vblank_irq)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	u32 cur_vblank, diff;
 	bool rc;
 	ktime_t t_vblank;
@@ -364,7 +377,7 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe,
 
 u64 drm_vblank_count(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	u64 count;
 
 	if (drm_WARN_ON(dev, pipe >= dev->num_crtcs))
@@ -438,7 +451,7 @@ static void __disable_vblank(struct drm_device *dev, unsigned int pipe)
  */
 void drm_vblank_disable_and_save(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	unsigned long irqflags;
 
 	assert_spin_locked(&dev->vbl_lock);
@@ -600,7 +613,7 @@ void drm_calc_timestamping_constants(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 	int linedur_ns = 0, framedur_ns = 0;
 	int dotclock = mode->crtc_clock;
 
@@ -930,7 +943,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_count);
 static u64 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
 				     ktime_t *vblanktime)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	u64 vblank_count;
 	unsigned int seq;
 
@@ -985,7 +998,6 @@ EXPORT_SYMBOL(drm_crtc_vblank_count_and_time);
  */
 int drm_crtc_next_vblank_start(struct drm_crtc *crtc, ktime_t *vblanktime)
 {
-	unsigned int pipe = drm_crtc_index(crtc);
 	struct drm_vblank_crtc *vblank;
 	struct drm_display_mode *mode;
 	u64 vblank_start;
@@ -993,7 +1005,7 @@ int drm_crtc_next_vblank_start(struct drm_crtc *crtc, ktime_t *vblanktime)
 	if (!drm_dev_has_vblank(crtc->dev))
 		return -EINVAL;
 
-	vblank = &crtc->dev->vblank[pipe];
+	vblank = drm_crtc_vblank_crtc(crtc);
 	mode = &vblank->hwmode;
 
 	if (!vblank->framedur_ns || !vblank->linedur_ns)
@@ -1147,7 +1159,7 @@ static int __enable_vblank(struct drm_device *dev, unsigned int pipe)
 
 static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	int ret = 0;
 
 	assert_spin_locked(&dev->vbl_lock);
@@ -1185,7 +1197,7 @@ static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe)
 
 int drm_vblank_get(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	unsigned long irqflags;
 	int ret = 0;
 
@@ -1228,7 +1240,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_get);
 
 void drm_vblank_put(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 
 	if (drm_WARN_ON(dev, pipe >= dev->num_crtcs))
 		return;
@@ -1274,7 +1286,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_put);
  */
 void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	int ret;
 	u64 last;
 
@@ -1327,7 +1339,7 @@ void drm_crtc_vblank_off(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
 	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 	struct drm_pending_vblank_event *e, *t;
 	ktime_t now;
 	u64 seq;
@@ -1405,8 +1417,7 @@ EXPORT_SYMBOL(drm_crtc_vblank_off);
 void drm_crtc_vblank_reset(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
-	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 
 	spin_lock_irq(&dev->vbl_lock);
 	/*
@@ -1445,8 +1456,7 @@ void drm_crtc_set_max_vblank_count(struct drm_crtc *crtc,
 				   u32 max_vblank_count)
 {
 	struct drm_device *dev = crtc->dev;
-	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 
 	drm_WARN_ON(dev, dev->max_vblank_count);
 	drm_WARN_ON(dev, !READ_ONCE(vblank->inmodeset));
@@ -1469,7 +1479,7 @@ void drm_crtc_vblank_on(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
 	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 
 	if (drm_WARN_ON(dev, pipe >= dev->num_crtcs))
 		return;
@@ -1512,7 +1522,7 @@ static void drm_vblank_restore(struct drm_device *dev, unsigned int pipe)
 	assert_spin_locked(&dev->vbl_lock);
 	assert_spin_locked(&dev->vblank_time_lock);
 
-	vblank = &dev->vblank[pipe];
+	vblank = drm_vblank_crtc(dev, pipe);
 	drm_WARN_ONCE(dev,
 		      drm_debug_enabled(DRM_UT_VBL) && !vblank->framedur_ns,
 		      "Cannot compute missed vblanks without frame duration\n");
@@ -1564,7 +1574,7 @@ static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe,
 				  union drm_wait_vblank *vblwait,
 				  struct drm_file *file_priv)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	struct drm_pending_vblank_event *e;
 	ktime_t now;
 	u64 seq;
@@ -1872,7 +1882,7 @@ static void drm_handle_vblank_events(struct drm_device *dev, unsigned int pipe)
  */
 bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe)
 {
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_vblank_crtc(dev, pipe);
 	unsigned long irqflags;
 	bool disable_irq;
 
@@ -1981,7 +1991,7 @@ int drm_crtc_get_sequence_ioctl(struct drm_device *dev, void *data,
 
 	pipe = drm_crtc_index(crtc);
 
-	vblank = &dev->vblank[pipe];
+	vblank = drm_crtc_vblank_crtc(crtc);
 	vblank_enabled = dev->vblank_disable_immediate && READ_ONCE(vblank->enabled);
 
 	if (!vblank_enabled) {
@@ -2046,7 +2056,7 @@ int drm_crtc_queue_sequence_ioctl(struct drm_device *dev, void *data,
 
 	pipe = drm_crtc_index(crtc);
 
-	vblank = &dev->vblank[pipe];
+	vblank = drm_crtc_vblank_crtc(crtc);
 
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
 	if (e == NULL)
diff --git a/drivers/gpu/drm/drm_vblank_work.c b/drivers/gpu/drm/drm_vblank_work.c
index 43cd5c0f4f6f..4fe9b1d3b00f 100644
--- a/drivers/gpu/drm/drm_vblank_work.c
+++ b/drivers/gpu/drm/drm_vblank_work.c
@@ -245,7 +245,7 @@ void drm_vblank_work_init(struct drm_vblank_work *work, struct drm_crtc *crtc,
 {
 	kthread_init_work(&work->base, func);
 	INIT_LIST_HEAD(&work->node);
-	work->vblank = &crtc->dev->vblank[drm_crtc_index(crtc)];
+	work->vblank = drm_crtc_vblank_crtc(crtc);
 }
 EXPORT_SYMBOL(drm_vblank_work_init);
 
-- 
cgit 


From 5cdc75eec091d00a406f0f6b5de03748b43ae3f4 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 8 Apr 2024 22:06:10 +0300
Subject: drm/nouveau: Use drm_crtc_vblank_crtc()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace the open coded drm_crtc_vblank_crtc() with the real
thing.

Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@redhat.com>
Cc: nouveau@lists.freedesktop.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408190611.24914-4-ville.syrjala@linux.intel.com
Reviewed-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/nouveau/nouveau_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index f28f9a857458..aed5d5b51b43 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -83,7 +83,7 @@ static bool
 nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
 				ktime_t *stime, ktime_t *etime)
 {
-	struct drm_vblank_crtc *vblank = &crtc->dev->vblank[drm_crtc_index(crtc)];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 	struct nvif_head *head = &nouveau_crtc(crtc)->head;
 	struct nvif_head_scanoutpos_v0 args;
 	int retry = 20;
-- 
cgit 


From c2f471fd8dd801f3ff3c260517fafd8bc953e7b4 Mon Sep 17 00:00:00 2001
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 8 Apr 2024 22:06:11 +0300
Subject: drm/vkms: Use drm_crtc_vblank_crtc()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Replace the open coded drm_crtc_vblank_crtc() with the real
thing.

Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Melissa Wen <melissa.srw@gmail.com>
Cc: "Maíra Canal" <mairacanal@riseup.net>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408190611.24914-5-ville.syrjala@linux.intel.com
Reviewed-by: Maíra Canal <mcanal@igalia.com>
---
 drivers/gpu/drm/vkms/vkms_crtc.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 61e500b8c9da..40b4d084e3ce 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -61,9 +61,7 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
 
 static int vkms_enable_vblank(struct drm_crtc *crtc)
 {
-	struct drm_device *dev = crtc->dev;
-	unsigned int pipe = drm_crtc_index(crtc);
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 	struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
 
 	drm_calc_timestamping_constants(crtc, &crtc->mode);
@@ -88,10 +86,9 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc,
 				      bool in_vblank_irq)
 {
 	struct drm_device *dev = crtc->dev;
-	unsigned int pipe = crtc->index;
 	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
 	struct vkms_output *output = &vkmsdev->output;
-	struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
+	struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
 
 	if (!READ_ONCE(vblank->enabled)) {
 		*vblank_time = ktime_get();
-- 
cgit 


From de1c705c50326acaceaf1f02bc5bf6f267c572bd Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon, 8 Apr 2024 02:53:51 +0300
Subject: drm/mipi-dsi: use correct return type for the DSC functions

The functions mipi_dsi_compression_mode() and
mipi_dsi_picture_parameter_set() return 0-or-error rather than a buffer
size. Follow example of other similar MIPI DSI functions and use int
return type instead of size_t.

Fixes: f4dea1aaa9a1 ("drm/dsi: add helpers for DSI compression mode and PPS packets")
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408-lg-sw43408-panel-v5-2-4e092da22991@linaro.org
---
 drivers/gpu/drm/drm_mipi_dsi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index ef6e416522f8..9874ff6d4718 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -654,7 +654,7 @@ EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size);
  *
  * Return: 0 on success or a negative error code on failure.
  */
-ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
+int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
 {
 	/* Note: Needs updating for non-default PPS or algorithm */
 	u8 tx[2] = { enable << 0, 0 };
@@ -679,8 +679,8 @@ EXPORT_SYMBOL(mipi_dsi_compression_mode);
  *
  * Return: 0 on success or a negative error code on failure.
  */
-ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
-				       const struct drm_dsc_picture_parameter_set *pps)
+int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
+				   const struct drm_dsc_picture_parameter_set *pps)
 {
 	struct mipi_dsi_msg msg = {
 		.channel = dsi->channel,
-- 
cgit 


From b724455e89ea9be900b81492897aadebcdc5ba92 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Mon, 8 Apr 2024 02:53:52 +0300
Subject: drm/mipi-dsi: add mipi_dsi_compression_mode_ext()

Add the extended version of mipi_dsi_compression_mode(). It provides
a way to specify the algorithm and PPS selector.

Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408-lg-sw43408-panel-v5-3-4e092da22991@linaro.org
---
 drivers/gpu/drm/drm_mipi_dsi.c | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 9874ff6d4718..795001bb7ff1 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -645,29 +645,56 @@ int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
 EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size);
 
 /**
- * mipi_dsi_compression_mode() - enable/disable DSC on the peripheral
+ * mipi_dsi_compression_mode_ext() - enable/disable DSC on the peripheral
  * @dsi: DSI peripheral device
  * @enable: Whether to enable or disable the DSC
+ * @algo: Selected compression algorithm
+ * @pps_selector: Select PPS from the table of pre-stored or uploaded PPS entries
  *
- * Enable or disable Display Stream Compression on the peripheral using the
- * default Picture Parameter Set and VESA DSC 1.1 algorithm.
+ * Enable or disable Display Stream Compression on the peripheral.
  *
  * Return: 0 on success or a negative error code on failure.
  */
-int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
+int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,
+				  enum mipi_dsi_compression_algo algo,
+				  unsigned int pps_selector)
 {
-	/* Note: Needs updating for non-default PPS or algorithm */
-	u8 tx[2] = { enable << 0, 0 };
+	u8 tx[2] = { };
 	struct mipi_dsi_msg msg = {
 		.channel = dsi->channel,
 		.type = MIPI_DSI_COMPRESSION_MODE,
 		.tx_len = sizeof(tx),
 		.tx_buf = tx,
 	};
-	int ret = mipi_dsi_device_transfer(dsi, &msg);
+	int ret;
+
+	if (algo > 3 || pps_selector > 3)
+		return -EINVAL;
+
+	tx[0] = (enable << 0) |
+		(algo << 1) |
+		(pps_selector << 4);
+
+	ret = mipi_dsi_device_transfer(dsi, &msg);
 
 	return (ret < 0) ? ret : 0;
 }
+EXPORT_SYMBOL(mipi_dsi_compression_mode_ext);
+
+/**
+ * mipi_dsi_compression_mode() - enable/disable DSC on the peripheral
+ * @dsi: DSI peripheral device
+ * @enable: Whether to enable or disable the DSC
+ *
+ * Enable or disable Display Stream Compression on the peripheral using the
+ * default Picture Parameter Set and VESA DSC 1.1 algorithm.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)
+{
+	return mipi_dsi_compression_mode_ext(dsi, enable, MIPI_DSI_COMPRESSION_DSC, 0);
+}
 EXPORT_SYMBOL(mipi_dsi_compression_mode);
 
 /**
-- 
cgit 


From 069a6c0e94f99437652dbb7229a56233c7d39968 Mon Sep 17 00:00:00 2001
From: Sumit Semwal <sumit.semwal@linaro.org>
Date: Mon, 8 Apr 2024 02:53:53 +0300
Subject: drm: panel: Add LG sw43408 panel driver

LG SW43408 is 1080x2160@60Hz, 4-lane MIPI-DSI panel, used in some
Google Pixel-3 phones.

Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
[vinod: Add DSC support]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
[caleb: cleanup and support turning off the panel]
Signed-off-by: Caleb Connolly <caleb@connolly.tech>
[DB: partially rewrote the driver and fixed DSC programming]
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408-lg-sw43408-panel-v5-4-4e092da22991@linaro.org
---
 drivers/gpu/drm/panel/Kconfig            |  11 ++
 drivers/gpu/drm/panel/Makefile           |   1 +
 drivers/gpu/drm/panel/panel-lg-sw43408.c | 320 +++++++++++++++++++++++++++++++
 3 files changed, 332 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-lg-sw43408.c

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 154f5bf82980..ab67789e59a2 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -335,6 +335,17 @@ config DRM_PANEL_LG_LG4573
 	  Say Y here if you want to enable support for LG4573 RGB panel.
 	  To compile this driver as a module, choose M here.
 
+config DRM_PANEL_LG_SW43408
+	tristate "LG SW43408 panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for LG sw43408 panel.
+	  The panel has a 1080x2160@60Hz resolution and uses 24 bit RGB per
+	  pixel. It provides a MIPI DSI interface to the host and has a
+	  built-in LED backlight.
+
 config DRM_PANEL_MAGNACHIP_D53E6EA8966
 	tristate "Magnachip D53E6EA8966 DSI panel"
 	depends on OF && SPI
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 24a02655d726..0b40b010e8e7 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK050H3146W) += panel-leadtek-ltk050h3146w.o
 obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o
 obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o
 obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
+obj-$(CONFIG_DRM_PANEL_LG_SW43408) += panel-lg-sw43408.o
 obj-$(CONFIG_DRM_PANEL_MAGNACHIP_D53E6EA8966) += panel-magnachip-d53e6ea8966.o
 obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o
 obj-$(CONFIG_DRM_PANEL_NEWVISION_NV3051D) += panel-newvision-nv3051d.o
diff --git a/drivers/gpu/drm/panel/panel-lg-sw43408.c b/drivers/gpu/drm/panel/panel-lg-sw43408.c
new file mode 100644
index 000000000000..115f4702d59f
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-lg-sw43408.c
@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019-2024 Linaro Ltd
+ * Author: Sumit Semwal <sumit.semwal@linaro.org>
+ *	 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+
+#define NUM_SUPPLIES 2
+
+struct sw43408_panel {
+	struct drm_panel base;
+	struct mipi_dsi_device *link;
+
+	struct regulator_bulk_data supplies[NUM_SUPPLIES];
+
+	struct gpio_desc *reset_gpio;
+
+	struct drm_dsc_config dsc;
+};
+
+static inline struct sw43408_panel *to_panel_info(struct drm_panel *panel)
+{
+	return container_of(panel, struct sw43408_panel, base);
+}
+
+static int sw43408_unprepare(struct drm_panel *panel)
+{
+	struct sw43408_panel *ctx = to_panel_info(panel);
+	int ret;
+
+	ret = mipi_dsi_dcs_set_display_off(ctx->link);
+	if (ret < 0)
+		dev_err(panel->dev, "set_display_off cmd failed ret = %d\n", ret);
+
+	ret = mipi_dsi_dcs_enter_sleep_mode(ctx->link);
+	if (ret < 0)
+		dev_err(panel->dev, "enter_sleep cmd failed ret = %d\n", ret);
+
+	msleep(100);
+
+	gpiod_set_value(ctx->reset_gpio, 1);
+
+	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static int sw43408_program(struct drm_panel *panel)
+{
+	struct sw43408_panel *ctx = to_panel_info(panel);
+	struct drm_dsc_picture_parameter_set pps;
+
+	mipi_dsi_dcs_write_seq(ctx->link, MIPI_DCS_SET_GAMMA_CURVE, 0x02);
+
+	mipi_dsi_dcs_set_tear_on(ctx->link, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+	mipi_dsi_dcs_write_seq(ctx->link, 0x53, 0x0c, 0x30);
+	mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x00, 0x70, 0xdf, 0x00, 0x70, 0xdf);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xf7, 0x01, 0x49, 0x0c);
+
+	mipi_dsi_dcs_exit_sleep_mode(ctx->link);
+
+	msleep(135);
+
+	/* COMPRESSION_MODE moved after setting the PPS */
+
+	mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xac);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xe5,
+			       0x00, 0x3a, 0x00, 0x3a, 0x00, 0x0e, 0x10);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xb5,
+			       0x75, 0x60, 0x2d, 0x5d, 0x80, 0x00, 0x0a, 0x0b,
+			       0x00, 0x05, 0x0b, 0x00, 0x80, 0x0d, 0x0e, 0x40,
+			       0x00, 0x0c, 0x00, 0x16, 0x00, 0xb8, 0x00, 0x80,
+			       0x0d, 0x0e, 0x40, 0x00, 0x0c, 0x00, 0x16, 0x00,
+			       0xb8, 0x00, 0x81, 0x00, 0x03, 0x03, 0x03, 0x01,
+			       0x01);
+	msleep(85);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xcd,
+			       0x00, 0x00, 0x00, 0x19, 0x19, 0x19, 0x19, 0x19,
+			       0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19,
+			       0x16, 0x16);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xcb, 0x80, 0x5c, 0x07, 0x03, 0x28);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xc0, 0x02, 0x02, 0x0f);
+	mipi_dsi_dcs_write_seq(ctx->link, 0x55, 0x04, 0x61, 0xdb, 0x04, 0x70, 0xdb);
+	mipi_dsi_dcs_write_seq(ctx->link, 0xb0, 0xca);
+
+	mipi_dsi_dcs_set_display_on(ctx->link);
+
+	msleep(50);
+
+	ctx->link->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	drm_dsc_pps_payload_pack(&pps, ctx->link->dsc);
+	mipi_dsi_picture_parameter_set(ctx->link, &pps);
+
+	ctx->link->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	/*
+	 * This panel uses PPS selectors with offset:
+	 * PPS 1 if pps_identifier is 0
+	 * PPS 2 if pps_identifier is 1
+	 */
+	mipi_dsi_compression_mode_ext(ctx->link, true,
+				      MIPI_DSI_COMPRESSION_DSC, 1);
+
+	return 0;
+}
+
+static int sw43408_prepare(struct drm_panel *panel)
+{
+	struct sw43408_panel *ctx = to_panel_info(panel);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(5000, 6000);
+
+	gpiod_set_value(ctx->reset_gpio, 0);
+	usleep_range(9000, 10000);
+	gpiod_set_value(ctx->reset_gpio, 1);
+	usleep_range(1000, 2000);
+	gpiod_set_value(ctx->reset_gpio, 0);
+	usleep_range(9000, 10000);
+
+	ret = sw43408_program(panel);
+	if (ret)
+		goto poweroff;
+
+	return 0;
+
+poweroff:
+	gpiod_set_value(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	return ret;
+}
+
+static const struct drm_display_mode sw43408_mode = {
+	.clock = (1080 + 20 + 32 + 20) * (2160 + 20 + 4 + 20) * 60 / 1000,
+
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 20,
+	.hsync_end = 1080 + 20 + 32,
+	.htotal = 1080 + 20 + 32 + 20,
+
+	.vdisplay = 2160,
+	.vsync_start = 2160 + 20,
+	.vsync_end = 2160 + 20 + 4,
+	.vtotal = 2160 + 20 + 4 + 20,
+
+	.width_mm = 62,
+	.height_mm = 124,
+
+	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static int sw43408_get_modes(struct drm_panel *panel,
+			     struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &sw43408_mode);
+}
+
+static int sw43408_backlight_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = backlight_get_brightness(bl);
+
+	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+}
+
+const struct backlight_ops sw43408_backlight_ops = {
+	.update_status = sw43408_backlight_update_status,
+};
+
+static int sw43408_backlight_init(struct sw43408_panel *ctx)
+{
+	struct device *dev = &ctx->link->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_PLATFORM,
+		.brightness = 255,
+		.max_brightness = 255,
+	};
+
+	ctx->base.backlight = devm_backlight_device_register(dev, dev_name(dev), dev,
+							     ctx->link,
+							     &sw43408_backlight_ops,
+							     &props);
+
+	if (IS_ERR(ctx->base.backlight))
+		return dev_err_probe(dev, PTR_ERR(ctx->base.backlight),
+				     "Failed to create backlight\n");
+
+	return 0;
+}
+
+static const struct drm_panel_funcs sw43408_funcs = {
+	.unprepare = sw43408_unprepare,
+	.prepare = sw43408_prepare,
+	.get_modes = sw43408_get_modes,
+};
+
+static const struct of_device_id sw43408_of_match[] = {
+	{ .compatible = "lg,sw43408", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sw43408_of_match);
+
+static int sw43408_add(struct sw43408_panel *ctx)
+{
+	struct device *dev = &ctx->link->dev;
+	int ret;
+
+	ctx->supplies[0].supply = "vddi"; /* 1.88 V */
+	ctx->supplies[0].init_load_uA = 62000;
+	ctx->supplies[1].supply = "vpnl"; /* 3.0 V */
+	ctx->supplies[1].init_load_uA = 857000;
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
+				      ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio)) {
+		ret = PTR_ERR(ctx->reset_gpio);
+		return dev_err_probe(dev, ret, "cannot get reset gpio\n");
+	}
+
+	ret = sw43408_backlight_init(ctx);
+	if (ret < 0)
+		return ret;
+
+	ctx->base.prepare_prev_first = true;
+
+	drm_panel_init(&ctx->base, dev, &sw43408_funcs, DRM_MODE_CONNECTOR_DSI);
+
+	drm_panel_add(&ctx->base);
+	return ret;
+}
+
+static int sw43408_probe(struct mipi_dsi_device *dsi)
+{
+	struct sw43408_panel *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	dsi->mode_flags = MIPI_DSI_MODE_LPM;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->lanes = 4;
+
+	ctx->link = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	ret = sw43408_add(ctx);
+	if (ret < 0)
+		return ret;
+
+	/* The panel works only in the DSC mode. Set DSC params. */
+	ctx->dsc.dsc_version_major = 0x1;
+	ctx->dsc.dsc_version_minor = 0x1;
+
+	/* slice_count * slice_width == width */
+	ctx->dsc.slice_height = 16;
+	ctx->dsc.slice_width = 540;
+	ctx->dsc.slice_count = 2;
+	ctx->dsc.bits_per_component = 8;
+	ctx->dsc.bits_per_pixel = 8 << 4;
+	ctx->dsc.block_pred_enable = true;
+
+	dsi->dsc = &ctx->dsc;
+
+	return mipi_dsi_attach(dsi);
+}
+
+static void sw43408_remove(struct mipi_dsi_device *dsi)
+{
+	struct sw43408_panel *ctx = mipi_dsi_get_drvdata(dsi);
+	int ret;
+
+	ret = sw43408_unprepare(&ctx->base);
+	if (ret < 0)
+		dev_err(&dsi->dev, "failed to unprepare panel: %d\n", ret);
+
+	ret = mipi_dsi_detach(dsi);
+	if (ret < 0)
+		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
+
+	drm_panel_remove(&ctx->base);
+}
+
+static struct mipi_dsi_driver sw43408_driver = {
+	.driver = {
+		.name = "panel-lg-sw43408",
+		.of_match_table = sw43408_of_match,
+	},
+	.probe = sw43408_probe,
+	.remove = sw43408_remove,
+};
+module_mipi_dsi_driver(sw43408_driver);
+
+MODULE_AUTHOR("Sumit Semwal <sumit.semwal@linaro.org>");
+MODULE_DESCRIPTION("LG SW436408 MIPI-DSI LED panel");
+MODULE_LICENSE("GPL");
-- 
cgit