1 files changed, 249 insertions, 46 deletions

diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 6db82f9b03af..9a461ab2f32f 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
  */
 
+#include <linux/string_choices.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_bridge.h>
@@ -11,37 +12,39 @@
 
 #include "msm_drv.h"
 #include "msm_kms.h"
+#include "dp_audio.h"
 #include "dp_drm.h"
 
 /**
- * dp_bridge_detect - callback to determine if connector is connected
+ * msm_dp_bridge_detect - callback to determine if connector is connected
  * @bridge: Pointer to drm bridge structure
  * Returns: Bridge's 'is connected' status
  */
-static enum drm_connector_status dp_bridge_detect(struct drm_bridge *bridge)
+static enum drm_connector_status
+msm_dp_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
 {
 	struct msm_dp *dp;
 
-	dp = to_dp_bridge(bridge)->dp_display;
+	dp = to_dp_bridge(bridge)->msm_dp_display;
 
-	drm_dbg_dp(dp->drm_dev, "is_connected = %s\n",
-		(dp->is_connected) ? "true" : "false");
+	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",
+		str_true_false(dp->link_ready));
 
-	return (dp->is_connected) ? connector_status_connected :
+	return (dp->link_ready) ? connector_status_connected :
 					connector_status_disconnected;
 }
 
-static int dp_bridge_atomic_check(struct drm_bridge *bridge,
+static int msm_dp_bridge_atomic_check(struct drm_bridge *bridge,
 			    struct drm_bridge_state *bridge_state,
 			    struct drm_crtc_state *crtc_state,
 			    struct drm_connector_state *conn_state)
 {
 	struct msm_dp *dp;
 
-	dp = to_dp_bridge(bridge)->dp_display;
+	dp = to_dp_bridge(bridge)->msm_dp_display;
 
-	drm_dbg_dp(dp->drm_dev, "is_connected = %s\n",
-		(dp->is_connected) ? "true" : "false");
+	drm_dbg_dp(dp->drm_dev, "link_ready = %s\n",
+		str_true_false(dp->link_ready));
 
 	/*
 	 * There is no protection in the DRM framework to check if the display
@@ -55,19 +58,19 @@ static int dp_bridge_atomic_check(struct drm_bridge *bridge,
 	 * After that this piece of code can be removed.
 	 */
 	if (bridge->ops & DRM_BRIDGE_OP_HPD)
-		return (dp->is_connected) ? 0 : -ENOTCONN;
+		return (dp->link_ready) ? 0 : -ENOTCONN;
 
 	return 0;
 }
 
 
 /**
- * dp_bridge_get_modes - callback to add drm modes via drm_mode_probed_add()
+ * msm_dp_bridge_get_modes - callback to add drm modes via drm_mode_probed_add()
  * @bridge: Poiner to drm bridge
  * @connector: Pointer to drm connector structure
  * Returns: Number of modes added
  */
-static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector)
+static int msm_dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector)
 {
 	int rc = 0;
 	struct msm_dp *dp;
@@ -75,11 +78,11 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
 	if (!connector)
 		return 0;
 
-	dp = to_dp_bridge(bridge)->dp_display;
+	dp = to_dp_bridge(bridge)->msm_dp_display;
 
 	/* pluggable case assumes EDID is read when HPD */
-	if (dp->is_connected) {
-		rc = dp_display_get_modes(dp);
+	if (dp->link_ready) {
+		rc = msm_dp_display_get_modes(dp);
 		if (rc <= 0) {
 			DRM_ERROR("failed to get DP sink modes, rc=%d\n", rc);
 			return rc;
@@ -90,36 +93,225 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
 	return rc;
 }
 
-static const struct drm_bridge_funcs dp_bridge_ops = {
+static void msm_dp_bridge_debugfs_init(struct drm_bridge *bridge, struct dentry *root)
+{
+	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;
+
+	msm_dp_display_debugfs_init(dp, root, false);
+}
+
+static const struct drm_bridge_funcs msm_dp_bridge_ops = {
 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 	.atomic_destroy_state   = drm_atomic_helper_bridge_destroy_state,
 	.atomic_reset           = drm_atomic_helper_bridge_reset,
-	.enable       = dp_bridge_enable,
-	.disable      = dp_bridge_disable,
-	.post_disable = dp_bridge_post_disable,
-	.mode_set     = dp_bridge_mode_set,
-	.mode_valid   = dp_bridge_mode_valid,
-	.get_modes    = dp_bridge_get_modes,
-	.detect       = dp_bridge_detect,
-	.atomic_check = dp_bridge_atomic_check,
+	.atomic_enable          = msm_dp_bridge_atomic_enable,
+	.atomic_disable         = msm_dp_bridge_atomic_disable,
+	.atomic_post_disable    = msm_dp_bridge_atomic_post_disable,
+	.mode_set     = msm_dp_bridge_mode_set,
+	.mode_valid   = msm_dp_bridge_mode_valid,
+	.get_modes    = msm_dp_bridge_get_modes,
+	.detect       = msm_dp_bridge_detect,
+	.atomic_check = msm_dp_bridge_atomic_check,
+	.hpd_enable   = msm_dp_bridge_hpd_enable,
+	.hpd_disable  = msm_dp_bridge_hpd_disable,
+	.hpd_notify   = msm_dp_bridge_hpd_notify,
+	.debugfs_init = msm_dp_bridge_debugfs_init,
+
+	.dp_audio_prepare = msm_dp_audio_prepare,
+	.dp_audio_shutdown = msm_dp_audio_shutdown,
 };
 
-struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
-			struct drm_encoder *encoder)
+static int msm_edp_bridge_atomic_check(struct drm_bridge *drm_bridge,
+				   struct drm_bridge_state *bridge_state,
+				   struct drm_crtc_state *crtc_state,
+				   struct drm_connector_state *conn_state)
+{
+	struct msm_dp *dp = to_dp_bridge(drm_bridge)->msm_dp_display;
+
+	if (WARN_ON(!conn_state))
+		return -ENODEV;
+
+	conn_state->self_refresh_aware = dp->psr_supported;
+
+	if (!conn_state->crtc || !crtc_state)
+		return 0;
+
+	if (crtc_state->self_refresh_active && !dp->psr_supported)
+		return -EINVAL;
+
+	return 0;
+}
+
+static void msm_edp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
+					 struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state;
+	struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
+	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
+
+	/*
+	 * Check the old state of the crtc to determine if the panel
+	 * was put into psr state previously by the msm_edp_bridge_atomic_disable.
+	 * If the panel is in psr, just exit psr state and skip the full
+	 * bridge enable sequence.
+	 */
+	crtc = drm_atomic_get_new_crtc_for_encoder(state,
+						   drm_bridge->encoder);
+	if (!crtc)
+		return;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
+
+	if (old_crtc_state && old_crtc_state->self_refresh_active) {
+		msm_dp_display_set_psr(dp, false);
+		return;
+	}
+
+	msm_dp_bridge_atomic_enable(drm_bridge, state);
+}
+
+static void msm_edp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
+					  struct drm_atomic_state *atomic_state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL;
+	struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge);
+	struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
+
+	crtc = drm_atomic_get_old_crtc_for_encoder(atomic_state,
+						   drm_bridge->encoder);
+	if (!crtc)
+		goto out;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(atomic_state, crtc);
+	if (!new_crtc_state)
+		goto out;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(atomic_state, crtc);
+	if (!old_crtc_state)
+		goto out;
+
+	/*
+	 * Set self refresh mode if current crtc state is active.
+	 *
+	 * If old crtc state is active, then this is a display disable
+	 * call while the sink is in psr state. So, exit psr here.
+	 * The eDP controller will be disabled in the
+	 * msm_edp_bridge_atomic_post_disable function.
+	 *
+	 * We observed sink is stuck in self refresh if psr exit is skipped
+	 * when display disable occurs while the sink is in psr state.
+	 */
+	if (new_crtc_state->self_refresh_active) {
+		msm_dp_display_set_psr(dp, true);
+		return;
+	} else if (old_crtc_state->self_refresh_active) {
+		msm_dp_display_set_psr(dp, false);
+		return;
+	}
+
+out:
+	msm_dp_bridge_atomic_disable(drm_bridge, atomic_state);
+}
+
+static void msm_edp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
+					       struct drm_atomic_state *atomic_state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *new_crtc_state = NULL;
+
+	crtc = drm_atomic_get_old_crtc_for_encoder(atomic_state,
+						   drm_bridge->encoder);
+	if (!crtc)
+		return;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(atomic_state, crtc);
+	if (!new_crtc_state)
+		return;
+
+	/*
+	 * Self refresh mode is already set in msm_edp_bridge_atomic_disable.
+	 */
+	if (new_crtc_state->self_refresh_active)
+		return;
+
+	msm_dp_bridge_atomic_post_disable(drm_bridge, atomic_state);
+}
+
+/**
+ * msm_edp_bridge_mode_valid - callback to determine if specified mode is valid
+ * @bridge: Pointer to drm bridge structure
+ * @info: display info
+ * @mode: Pointer to drm mode structure
+ * Returns: Validity status for specified mode
+ */
+static enum drm_mode_status msm_edp_bridge_mode_valid(struct drm_bridge *bridge,
+					  const struct drm_display_info *info,
+					  const struct drm_display_mode *mode)
+{
+	struct msm_dp *dp;
+	int mode_pclk_khz = mode->clock;
+
+	dp = to_dp_bridge(bridge)->msm_dp_display;
+
+	if (!dp || !mode_pclk_khz || !dp->connector) {
+		DRM_ERROR("invalid params\n");
+		return -EINVAL;
+	}
+
+	if (msm_dp_wide_bus_available(dp))
+		mode_pclk_khz /= 2;
+
+	if (mode_pclk_khz > DP_MAX_PIXEL_CLK_KHZ)
+		return MODE_CLOCK_HIGH;
+
+	/*
+	 * The eDP controller currently does not have a reliable way of
+	 * enabling panel power to read sink capabilities. So, we rely
+	 * on the panel driver to populate only supported modes for now.
+	 */
+	return MODE_OK;
+}
+
+static void msm_edp_bridge_debugfs_init(struct drm_bridge *bridge, struct dentry *root)
+{
+	struct msm_dp *dp = to_dp_bridge(bridge)->msm_dp_display;
+
+	msm_dp_display_debugfs_init(dp, root, true);
+}
+
+static const struct drm_bridge_funcs msm_edp_bridge_ops = {
+	.atomic_enable = msm_edp_bridge_atomic_enable,
+	.atomic_disable = msm_edp_bridge_atomic_disable,
+	.atomic_post_disable = msm_edp_bridge_atomic_post_disable,
+	.mode_set = msm_dp_bridge_mode_set,
+	.mode_valid = msm_edp_bridge_mode_valid,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_check = msm_edp_bridge_atomic_check,
+	.debugfs_init = msm_edp_bridge_debugfs_init,
+};
+
+int msm_dp_bridge_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
+		   struct drm_encoder *encoder, bool yuv_supported)
 {
 	int rc;
-	struct msm_dp_bridge *dp_bridge;
+	struct msm_dp_bridge *msm_dp_bridge;
 	struct drm_bridge *bridge;
 
-	dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
-	if (!dp_bridge)
-		return ERR_PTR(-ENOMEM);
+	msm_dp_bridge = devm_drm_bridge_alloc(dev->dev, struct msm_dp_bridge, bridge,
+					      msm_dp_display->is_edp ? &msm_edp_bridge_ops :
+					      &msm_dp_bridge_ops);
+	if (IS_ERR(msm_dp_bridge))
+		return PTR_ERR(msm_dp_bridge);
 
-	dp_bridge->dp_display = dp_display;
+	msm_dp_bridge->msm_dp_display = msm_dp_display;
 
-	bridge = &dp_bridge->bridge;
-	bridge->funcs = &dp_bridge_ops;
-	bridge->type = dp_display->connector_type;
+	bridge = &msm_dp_bridge->bridge;
+	bridge->type = msm_dp_display->connector_type;
+	bridge->ycbcr_420_allowed = yuv_supported;
 
 	/*
 	 * Many ops only make sense for DP. Why?
@@ -132,46 +324,57 @@ struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *
 	 *   allows the panel driver to properly power itself on to read the
 	 *   modes.
 	 */
-	if (!dp_display->is_edp) {
+	if (!msm_dp_display->is_edp) {
 		bridge->ops =
+			DRM_BRIDGE_OP_DP_AUDIO |
 			DRM_BRIDGE_OP_DETECT |
 			DRM_BRIDGE_OP_HPD |
 			DRM_BRIDGE_OP_MODES;
+		bridge->hdmi_audio_dev = &msm_dp_display->pdev->dev;
+		bridge->hdmi_audio_max_i2s_playback_channels = 8;
+		bridge->hdmi_audio_dai_port = -1;
 	}
 
-	drm_bridge_add(bridge);
+	rc = devm_drm_bridge_add(dev->dev, bridge);
+	if (rc) {
+		DRM_ERROR("failed to add bridge, rc=%d\n", rc);
+
+		return rc;
+	}
 
 	rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (rc) {
 		DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
-		drm_bridge_remove(bridge);
 
-		return ERR_PTR(rc);
+		return rc;
 	}
 
-	if (dp_display->next_bridge) {
+	if (msm_dp_display->next_bridge) {
 		rc = drm_bridge_attach(encoder,
-					dp_display->next_bridge, bridge,
+					msm_dp_display->next_bridge, bridge,
 					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 		if (rc < 0) {
 			DRM_ERROR("failed to attach panel bridge: %d\n", rc);
-			drm_bridge_remove(bridge);
-			return ERR_PTR(rc);
+			return rc;
 		}
 	}
 
-	return bridge;
+	return 0;
 }
 
 /* connector initialization */
-struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display, struct drm_encoder *encoder)
+struct drm_connector *msm_dp_drm_connector_init(struct msm_dp *msm_dp_display,
+					    struct drm_encoder *encoder)
 {
 	struct drm_connector *connector = NULL;
 
-	connector = drm_bridge_connector_init(dp_display->drm_dev, encoder);
+	connector = drm_bridge_connector_init(msm_dp_display->drm_dev, encoder);
 	if (IS_ERR(connector))
 		return connector;
 
+	if (!msm_dp_display->is_edp)
+		drm_connector_attach_dp_subconnector_property(connector);
+
 	drm_connector_attach_encoder(connector, encoder);
 
 	return connector;