1 files changed, 263 insertions, 133 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index abc7d8fe06b4..8a409eee1dca 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -1,80 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (C) 2015 Free Electrons
  * Copyright (C) 2015 NextThing Co
  *
  * Maxime Ripard <maxime.ripard@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
  */
 
+#include <linux/aperture.h>
 #include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/kfifo.h>
+#include <linux/module.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
-
-#include <drm/drmP.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_fb_helper.h>
+#include <linux/platform_device.h>
+
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_dma.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_module.h>
 #include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
 
 #include "sun4i_drv.h"
+#include "sun4i_frontend.h"
 #include "sun4i_framebuffer.h"
 #include "sun4i_tcon.h"
+#include "sun8i_tcon_top.h"
 
-DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops);
+static int drm_sun4i_gem_dumb_create(struct drm_file *file_priv,
+				     struct drm_device *drm,
+				     struct drm_mode_create_dumb *args)
+{
+	/* The hardware only allows even pitches for YUV buffers. */
+	args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), 2);
 
-static struct drm_driver sun4i_drv_driver = {
-	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
+	return drm_gem_dma_dumb_create_internal(file_priv, drm, args);
+}
+
+DEFINE_DRM_GEM_DMA_FOPS(sun4i_drv_fops);
+
+static const struct drm_driver sun4i_drv_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 
 	/* Generic Operations */
 	.fops			= &sun4i_drv_fops,
 	.name			= "sun4i-drm",
 	.desc			= "Allwinner sun4i Display Engine",
-	.date			= "20150629",
 	.major			= 1,
 	.minor			= 0,
 
 	/* GEM Operations */
-	.dumb_create		= drm_gem_cma_dumb_create,
-	.dumb_destroy		= drm_gem_dumb_destroy,
-	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
-	.gem_free_object_unlocked = drm_gem_cma_free_object,
-	.gem_vm_ops		= &drm_gem_cma_vm_ops,
-
-	/* PRIME Operations */
-	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
-	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
-	.gem_prime_import	= drm_gem_prime_import,
-	.gem_prime_export	= drm_gem_prime_export,
-	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
-	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
-	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
-	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
-	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
-
-	/* Frame Buffer Operations */
+	DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_sun4i_gem_dumb_create),
+	DRM_FBDEV_DMA_DRIVER_OPS,
 };
 
-static void sun4i_remove_framebuffers(void)
-{
-	struct apertures_struct *ap;
-
-	ap = alloc_apertures(1);
-	if (!ap)
-		return;
-
-	/* The framebuffer can be located anywhere in RAM */
-	ap->ranges[0].base = 0;
-	ap->ranges[0].size = ~0;
-
-	drm_fb_helper_remove_conflicting_framebuffers(ap, "sun4i-drm-fb", false);
-	kfree(ap);
-}
-
 static int sun4i_drv_bind(struct device *dev)
 {
 	struct drm_device *drm;
@@ -90,7 +74,9 @@ static int sun4i_drv_bind(struct device *dev)
 		ret = -ENOMEM;
 		goto free_drm;
 	}
+
 	drm->dev_private = drv;
+	INIT_LIST_HEAD(&drv->frontend_list);
 	INIT_LIST_HEAD(&drv->engine_list);
 	INIT_LIST_HEAD(&drv->tcon_list);
 
@@ -100,11 +86,6 @@ static int sun4i_drv_bind(struct device *dev)
 		goto free_drm;
 	}
 
-	/* drm_vblank_init calls kcalloc, which can fail */
-	ret = drm_vblank_init(drm, 1);
-	if (ret)
-		goto free_mem_region;
-
 	drm_mode_config_init(drm);
 
 	ret = component_bind_all(drm->dev, drm);
@@ -113,18 +94,17 @@ static int sun4i_drv_bind(struct device *dev)
 		goto cleanup_mode_config;
 	}
 
-	drm->irq_enabled = true;
+	/* drm_vblank_init calls kcalloc, which can fail */
+	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+	if (ret)
+		goto unbind_all;
 
 	/* Remove early framebuffers (ie. simplefb) */
-	sun4i_remove_framebuffers();
+	ret = aperture_remove_all_conflicting_devices(sun4i_drv_driver.name);
+	if (ret)
+		goto unbind_all;
 
-	/* Create our framebuffer */
-	drv->fbdev = sun4i_framebuffer_init(drm);
-	if (IS_ERR(drv->fbdev)) {
-		dev_err(drm->dev, "Couldn't create our framebuffer\n");
-		ret = PTR_ERR(drv->fbdev);
-		goto cleanup_mode_config;
-	}
+	sun4i_framebuffer_init(drm);
 
 	/* Enable connectors polling */
 	drm_kms_helper_poll_init(drm);
@@ -133,17 +113,21 @@ static int sun4i_drv_bind(struct device *dev)
 	if (ret)
 		goto finish_poll;
 
+	drm_client_setup(drm, NULL);
+
+	dev_set_drvdata(dev, drm);
+
 	return 0;
 
 finish_poll:
 	drm_kms_helper_poll_fini(drm);
-	sun4i_framebuffer_free(drm);
+unbind_all:
+	component_unbind_all(dev, NULL);
 cleanup_mode_config:
 	drm_mode_config_cleanup(drm);
-free_mem_region:
 	of_reserved_mem_device_release(dev);
 free_drm:
-	drm_dev_unref(drm);
+	drm_dev_put(drm);
 	return ret;
 }
 
@@ -151,12 +135,16 @@ static void sun4i_drv_unbind(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
 
+	dev_set_drvdata(dev, NULL);
 	drm_dev_unregister(drm);
 	drm_kms_helper_poll_fini(drm);
-	sun4i_framebuffer_free(drm);
+	drm_atomic_helper_shutdown(drm);
 	drm_mode_config_cleanup(drm);
+
+	component_unbind_all(dev, NULL);
 	of_reserved_mem_device_release(dev);
-	drm_dev_unref(drm);
+
+	drm_dev_put(drm);
 }
 
 static const struct component_master_ops sun4i_drv_master_ops = {
@@ -171,40 +159,151 @@ static bool sun4i_drv_node_is_connector(struct device_node *node)
 
 static bool sun4i_drv_node_is_frontend(struct device_node *node)
 {
-	return of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
+	return of_device_is_compatible(node, "allwinner,sun4i-a10-display-frontend") ||
+		of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
 		of_device_is_compatible(node, "allwinner,sun6i-a31-display-frontend") ||
-		of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend");
+		of_device_is_compatible(node, "allwinner,sun7i-a20-display-frontend") ||
+		of_device_is_compatible(node, "allwinner,sun8i-a23-display-frontend") ||
+		of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend") ||
+		of_device_is_compatible(node, "allwinner,sun9i-a80-display-frontend");
+}
+
+static bool sun4i_drv_node_is_deu(struct device_node *node)
+{
+	return of_device_is_compatible(node, "allwinner,sun9i-a80-deu");
+}
+
+static bool sun4i_drv_node_is_supported_frontend(struct device_node *node)
+{
+	if (IS_ENABLED(CONFIG_DRM_SUN4I_BACKEND))
+		return !!of_match_node(sun4i_frontend_of_table, node);
+
+	return false;
 }
 
 static bool sun4i_drv_node_is_tcon(struct device_node *node)
 {
-	return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon") ||
-		of_device_is_compatible(node, "allwinner,sun6i-a31-tcon") ||
-		of_device_is_compatible(node, "allwinner,sun6i-a31s-tcon") ||
-		of_device_is_compatible(node, "allwinner,sun8i-a33-tcon") ||
-		of_device_is_compatible(node, "allwinner,sun8i-v3s-tcon");
+	return !!of_match_node(sun4i_tcon_of_table, node);
 }
 
-static int compare_of(struct device *dev, void *data)
+static bool sun4i_drv_node_is_tcon_with_ch0(struct device_node *node)
 {
-	DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
-			 of_node_full_name(dev->of_node),
-			 of_node_full_name(data));
+	const struct of_device_id *match;
+
+	match = of_match_node(sun4i_tcon_of_table, node);
+	if (match) {
+		struct sun4i_tcon_quirks *quirks;
+
+		quirks = (struct sun4i_tcon_quirks *)match->data;
 
-	return dev->of_node == data;
+		return quirks->has_channel_0;
+	}
+
+	return false;
+}
+
+static bool sun4i_drv_node_is_tcon_top(struct device_node *node)
+{
+	return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
+		!!of_match_node(sun8i_tcon_top_of_table, node);
+}
+
+/*
+ * The encoder drivers use drm_of_find_possible_crtcs to get upstream
+ * crtcs from the device tree using of_graph. For the results to be
+ * correct, encoders must be probed/bound after _all_ crtcs have been
+ * created. The existing code uses a depth first recursive traversal
+ * of the of_graph, which means the encoders downstream of the TCON
+ * get add right after the first TCON. The second TCON or CRTC will
+ * never be properly associated with encoders connected to it.
+ *
+ * Also, in a dual display pipeline setup, both frontends can feed
+ * either backend, and both backends can feed either TCON, we want
+ * all components of the same type to be added before the next type
+ * in the pipeline. Fortunately, the pipelines are perfectly symmetric,
+ * i.e. components of the same type are at the same depth when counted
+ * from the frontend. The only exception is the third pipeline in
+ * the A80 SoC, which we do not support anyway.
+ *
+ * Hence we can use a breadth first search traversal order to add
+ * components. We do not need to check for duplicates. The component
+ * matching system handles this for us.
+ */
+struct endpoint_list {
+	DECLARE_KFIFO(fifo, struct device_node *, 16);
+};
+
+static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
+					 struct device_node *node,
+					 int port_id)
+{
+	struct device_node *ep, *remote, *port;
+
+	port = of_graph_get_port_by_id(node, port_id);
+	if (!port) {
+		DRM_DEBUG_DRIVER("No output to bind on port %d\n", port_id);
+		return;
+	}
+
+	for_each_available_child_of_node(port, ep) {
+		remote = of_graph_get_remote_port_parent(ep);
+		if (!remote) {
+			DRM_DEBUG_DRIVER("Error retrieving the output node\n");
+			continue;
+		}
+
+		if (sun4i_drv_node_is_tcon(node)) {
+			/*
+			 * TCON TOP is always probed before TCON. However, TCON
+			 * points back to TCON TOP when it is source for HDMI.
+			 * We have to skip it here to prevent infinite looping
+			 * between TCON TOP and TCON.
+			 */
+			if (sun4i_drv_node_is_tcon_top(remote)) {
+				DRM_DEBUG_DRIVER("TCON output endpoint is TCON TOP... skipping\n");
+				of_node_put(remote);
+				continue;
+			}
+
+			/*
+			 * If the node is our TCON with channel 0, the first
+			 * port is used for panel or bridges, and will not be
+			 * part of the component framework.
+			 */
+			if (sun4i_drv_node_is_tcon_with_ch0(node)) {
+				struct of_endpoint endpoint;
+
+				if (of_graph_parse_endpoint(ep, &endpoint)) {
+					DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
+					of_node_put(remote);
+					continue;
+				}
+
+				if (!endpoint.id) {
+					DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
+					of_node_put(remote);
+					continue;
+				}
+			}
+		}
+
+		kfifo_put(&list->fifo, remote);
+	}
 }
 
 static int sun4i_drv_add_endpoints(struct device *dev,
+				   struct endpoint_list *list,
 				   struct component_match **match,
 				   struct device_node *node)
 {
-	struct device_node *port, *ep, *remote;
 	int count = 0;
 
 	/*
-	 * We don't support the frontend for now, so we will never
-	 * have a device bound. Just skip over it, but we still want
-	 * the rest our pipeline to be added.
+	 * The frontend has been disabled in some of our old device
+	 * trees. If we find a node that is the frontend and is
+	 * disabled, we should just follow through and parse its
+	 * child, but without adding it to the component list.
+	 * Otherwise, we obviously want to add it to the list.
 	 */
 	if (!sun4i_drv_node_is_frontend(node) &&
 	    !of_device_is_available(node))
@@ -217,62 +316,69 @@ static int sun4i_drv_add_endpoints(struct device *dev,
 	if (sun4i_drv_node_is_connector(node))
 		return 0;
 
-	if (!sun4i_drv_node_is_frontend(node)) {
+	/*
+	 * If the device is either just a regular device, or an
+	 * enabled frontend supported by the driver, we add it to our
+	 * component list.
+	 */
+	if (!(sun4i_drv_node_is_frontend(node) ||
+	      sun4i_drv_node_is_deu(node)) ||
+	    (sun4i_drv_node_is_supported_frontend(node) &&
+	     of_device_is_available(node))) {
 		/* Add current component */
-		DRM_DEBUG_DRIVER("Adding component %s\n",
-				 of_node_full_name(node));
-		drm_of_component_match_add(dev, match, compare_of, node);
+		DRM_DEBUG_DRIVER("Adding component %pOF\n", node);
+		drm_of_component_match_add(dev, match, component_compare_of, node);
 		count++;
 	}
 
-	/* Inputs are listed first, then outputs */
-	port = of_graph_get_port_by_id(node, 1);
-	if (!port) {
-		DRM_DEBUG_DRIVER("No output to bind\n");
-		return count;
-	}
+	/* each node has at least one output */
+	sun4i_drv_traverse_endpoints(list, node, 1);
 
-	for_each_available_child_of_node(port, ep) {
-		remote = of_graph_get_remote_port_parent(ep);
-		if (!remote) {
-			DRM_DEBUG_DRIVER("Error retrieving the output node\n");
-			of_node_put(remote);
-			continue;
-		}
-
-		/*
-		 * If the node is our TCON, the first port is used for
-		 * panel or bridges, and will not be part of the
-		 * component framework.
-		 */
-		if (sun4i_drv_node_is_tcon(node)) {
-			struct of_endpoint endpoint;
+	/* TCON TOP has second and third output */
+	if (sun4i_drv_node_is_tcon_top(node)) {
+		sun4i_drv_traverse_endpoints(list, node, 3);
+		sun4i_drv_traverse_endpoints(list, node, 5);
+	}
 
-			if (of_graph_parse_endpoint(ep, &endpoint)) {
-				DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
-				continue;
-			}
+	return count;
+}
 
-			if (!endpoint.id) {
-				DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
-				continue;
-			}
-		}
+#ifdef CONFIG_PM_SLEEP
+static int sun4i_drv_drm_sys_suspend(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
 
-		/* Walk down our tree */
-		count += sun4i_drv_add_endpoints(dev, match, remote);
+	return drm_mode_config_helper_suspend(drm);
+}
 
-		of_node_put(remote);
-	}
+static int sun4i_drv_drm_sys_resume(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
 
-	return count;
+	return drm_mode_config_helper_resume(drm);
 }
+#endif
+
+static const struct dev_pm_ops sun4i_drv_drm_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(sun4i_drv_drm_sys_suspend,
+				sun4i_drv_drm_sys_resume)
+};
 
 static int sun4i_drv_probe(struct platform_device *pdev)
 {
 	struct component_match *match = NULL;
-	struct device_node *np = pdev->dev.of_node;
-	int i, count = 0;
+	struct device_node *np = pdev->dev.of_node, *endpoint;
+	struct endpoint_list list;
+	int i, ret, count = 0;
+
+	INIT_KFIFO(list.fifo);
+
+	/*
+	 * DE2 and DE3 cores actually supports 40-bit addresses, but
+	 * driver does not.
+	 */
+	dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(&pdev->dev, UINT_MAX);
 
 	for (i = 0;; i++) {
 		struct device_node *pipeline = of_parse_phandle(np,
@@ -281,12 +387,19 @@ static int sun4i_drv_probe(struct platform_device *pdev)
 		if (!pipeline)
 			break;
 
-		count += sun4i_drv_add_endpoints(&pdev->dev, &match,
-						pipeline);
-		of_node_put(pipeline);
+		kfifo_put(&list.fifo, pipeline);
+	}
 
-		DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
-				 count, i);
+	while (kfifo_get(&list.fifo, &endpoint)) {
+		/* process this endpoint */
+		ret = sun4i_drv_add_endpoints(&pdev->dev, &list, &match,
+					      endpoint);
+
+		/* sun4i_drv_add_endpoints can fail to allocate memory */
+		if (ret < 0)
+			return ret;
+
+		count += ret;
 	}
 
 	if (count)
@@ -297,18 +410,33 @@ static int sun4i_drv_probe(struct platform_device *pdev)
 		return 0;
 }
 
-static int sun4i_drv_remove(struct platform_device *pdev)
+static void sun4i_drv_remove(struct platform_device *pdev)
 {
-	return 0;
+	component_master_del(&pdev->dev, &sun4i_drv_master_ops);
+}
+
+static void sun4i_drv_shutdown(struct platform_device *pdev)
+{
+	drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 }
 
 static const struct of_device_id sun4i_drv_of_table[] = {
+	{ .compatible = "allwinner,sun4i-a10-display-engine" },
 	{ .compatible = "allwinner,sun5i-a10s-display-engine" },
 	{ .compatible = "allwinner,sun5i-a13-display-engine" },
 	{ .compatible = "allwinner,sun6i-a31-display-engine" },
 	{ .compatible = "allwinner,sun6i-a31s-display-engine" },
+	{ .compatible = "allwinner,sun7i-a20-display-engine" },
+	{ .compatible = "allwinner,sun8i-a23-display-engine" },
 	{ .compatible = "allwinner,sun8i-a33-display-engine" },
+	{ .compatible = "allwinner,sun8i-a83t-display-engine" },
+	{ .compatible = "allwinner,sun8i-h3-display-engine" },
+	{ .compatible = "allwinner,sun8i-r40-display-engine" },
 	{ .compatible = "allwinner,sun8i-v3s-display-engine" },
+	{ .compatible = "allwinner,sun9i-a80-display-engine" },
+	{ .compatible = "allwinner,sun20i-d1-display-engine" },
+	{ .compatible = "allwinner,sun50i-a64-display-engine" },
+	{ .compatible = "allwinner,sun50i-h6-display-engine" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
@@ -316,12 +444,14 @@ MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
 static struct platform_driver sun4i_drv_platform_driver = {
 	.probe		= sun4i_drv_probe,
 	.remove		= sun4i_drv_remove,
+	.shutdown	= sun4i_drv_shutdown,
 	.driver		= {
 		.name		= "sun4i-drm",
 		.of_match_table	= sun4i_drv_of_table,
+		.pm = &sun4i_drv_drm_pm_ops,
 	},
 };
-module_platform_driver(sun4i_drv_platform_driver);
+drm_module_platform_driver(sun4i_drv_platform_driver);
 
 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");