Merge tag 'du-next-20210105' of git://linuxtv.org/pinchartl/media into drm-next

- Add default modes for connectors in unknown state
- R-Car DU conversion to DRM-managed API
- R-Car DU miscellaneous fixes
- Miscellaneous bridge and bridge bindings fixes
- Assorted misc driver cleanups
- Constify drm_driver for PCI devices

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/X/P8IOrVXkTpLeCm@pendragon.ideasonboard.com

28 files changed, 179 insertions, 197 deletions

diff --git a/drivers/gpu/drm/arc/arcpgu_crtc.c b/drivers/gpu/drm/arc/arcpgu_crtc.c
index 042d7b54a6de..895cdd991af6 100644
--- a/drivers/gpu/drm/arc/arcpgu_crtc.c
+++ b/drivers/gpu/drm/arc/arcpgu_crtc.c
@@ -162,15 +162,10 @@ static const struct drm_plane_helper_funcs arc_pgu_plane_helper_funcs = {
 	.atomic_update = arc_pgu_plane_atomic_update,
 };
 
-static void arc_pgu_plane_destroy(struct drm_plane *plane)
-{
-	drm_plane_cleanup(plane);
-}
-
 static const struct drm_plane_funcs arc_pgu_plane_funcs = {
 	.update_plane		= drm_atomic_helper_update_plane,
 	.disable_plane		= drm_atomic_helper_disable_plane,
-	.destroy		= arc_pgu_plane_destroy,
+	.destroy		= drm_plane_cleanup,
 	.reset			= drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
@@ -213,7 +208,7 @@ int arc_pgu_setup_crtc(struct drm_device *drm)
 	ret = drm_crtc_init_with_planes(drm, &arcpgu->crtc, primary, NULL,
 					&arc_pgu_crtc_funcs, NULL);
 	if (ret) {
-		arc_pgu_plane_destroy(primary);
+		drm_plane_cleanup(primary);
 		return ret;
 	}
 
diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
index f164818ec477..077d006b1fbf 100644
--- a/drivers/gpu/drm/arc/arcpgu_drv.c
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -145,7 +145,7 @@ static void arcpgu_debugfs_init(struct drm_minor *minor)
 }
 #endif
 
-static struct drm_driver arcpgu_drm_driver = {
+static const struct drm_driver arcpgu_drm_driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 	.name = "arcpgu",
 	.desc = "ARC PGU Controller",
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index a0d392c338da..76555ae64e9c 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -1292,8 +1292,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 
 err_unregister_cec:
 	i2c_unregister_device(adv7511->i2c_cec);
-	if (adv7511->cec_clk)
-		clk_disable_unprepare(adv7511->cec_clk);
+	clk_disable_unprepare(adv7511->cec_clk);
 err_i2c_unregister_packet:
 	i2c_unregister_device(adv7511->i2c_packet);
 err_i2c_unregister_edid:
@@ -1311,8 +1310,7 @@ static int adv7511_remove(struct i2c_client *i2c)
 	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
 		adv7533_detach_dsi(adv7511);
 	i2c_unregister_device(adv7511->i2c_cec);
-	if (adv7511->cec_clk)
-		clk_disable_unprepare(adv7511->cec_clk);
+	clk_disable_unprepare(adv7511->cec_clk);
 
 	adv7511_uninit_regulators(adv7511);
 
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 0c79a9ba48bb..dda4fa9a1a08 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3440,8 +3440,7 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
 
 err_iahb:
 	clk_disable_unprepare(hdmi->iahb_clk);
-	if (hdmi->cec_clk)
-		clk_disable_unprepare(hdmi->cec_clk);
+	clk_disable_unprepare(hdmi->cec_clk);
 err_isfr:
 	clk_disable_unprepare(hdmi->isfr_clk);
 err_res:
@@ -3465,8 +3464,7 @@ void dw_hdmi_remove(struct dw_hdmi *hdmi)
 
 	clk_disable_unprepare(hdmi->iahb_clk);
 	clk_disable_unprepare(hdmi->isfr_clk);
-	if (hdmi->cec_clk)
-		clk_disable_unprepare(hdmi->cec_clk);
+	clk_disable_unprepare(hdmi->cec_clk);
 
 	if (hdmi->i2c)
 		i2c_del_adapter(&hdmi->i2c->adap);
diff --git a/drivers/gpu/drm/bridge/thc63lvd1024.c b/drivers/gpu/drm/bridge/thc63lvd1024.c
index 86b06975bfdd..e21078b2f8b5 100644
--- a/drivers/gpu/drm/bridge/thc63lvd1024.c
+++ b/drivers/gpu/drm/bridge/thc63lvd1024.c
@@ -202,7 +202,7 @@ static int thc63_probe(struct platform_device *pdev)
 	thc63->dev = &pdev->dev;
 	platform_set_drvdata(pdev, thc63);
 
-	thc63->vcc = devm_regulator_get_optional(thc63->dev, "vcc");
+	thc63->vcc = devm_regulator_get(thc63->dev, "vcc");
 	if (IS_ERR(thc63->vcc)) {
 		if (PTR_ERR(thc63->vcc) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index ddf7eabdbf3b..d384a5b8119f 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -589,11 +589,7 @@ static int drm_dev_init(struct drm_device *dev,
 
 	kref_init(&dev->ref);
 	dev->dev = get_device(parent);
-#ifdef CONFIG_DRM_LEGACY
-	dev->driver = (struct drm_driver *)driver;
-#else
 	dev->driver = driver;
-#endif
 
 	INIT_LIST_HEAD(&dev->managed.resources);
 	spin_lock_init(&dev->managed.lock);
diff --git a/drivers/gpu/drm/drm_dumb_buffers.c b/drivers/gpu/drm/drm_dumb_buffers.c
index d18a740fe0f1..ad17fa21cebb 100644
--- a/drivers/gpu/drm/drm_dumb_buffers.c
+++ b/drivers/gpu/drm/drm_dumb_buffers.c
@@ -29,6 +29,7 @@
 #include <drm/drm_mode.h>
 
 #include "drm_crtc_internal.h"
+#include "drm_internal.h"
 
 /**
  * DOC: overview
@@ -46,9 +47,10 @@
  * KMS frame buffers.
  *
  * To support dumb objects drivers must implement the &drm_driver.dumb_create
- * operation. &drm_driver.dumb_destroy defaults to drm_gem_dumb_destroy() if
- * not set and &drm_driver.dumb_map_offset defaults to
- * drm_gem_dumb_map_offset(). See the callbacks for further details.
+ * and &drm_driver.dumb_map_offset operations (the latter defaults to
+ * drm_gem_dumb_map_offset() if not set). Drivers that don't use GEM handles
+ * additionally need to implement the &drm_driver.dumb_destroy operation. See
+ * the callbacks for further details.
  *
  * Note that dumb objects may not be used for gpu acceleration, as has been
  * attempted on some ARM embedded platforms. Such drivers really must have
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 92f89cee213e..34b2f111c01c 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -335,22 +335,12 @@ out:
 }
 EXPORT_SYMBOL_GPL(drm_gem_dumb_map_offset);
 
-/**
- * drm_gem_dumb_destroy - dumb fb callback helper for gem based drivers
- * @file: drm file-private structure to remove the dumb handle from
- * @dev: corresponding drm_device
- * @handle: the dumb handle to remove
- *
- * This implements the &drm_driver.dumb_destroy kms driver callback for drivers
- * which use gem to manage their backing storage.
- */
 int drm_gem_dumb_destroy(struct drm_file *file,
 			 struct drm_device *dev,
-			 uint32_t handle)
+			 u32 handle)
 {
 	return drm_gem_handle_delete(file, handle);
 }
-EXPORT_SYMBOL(drm_gem_dumb_destroy);
 
 /**
  * drm_gem_handle_create_tail - internal functions to create a handle
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 81d386b5b92a..fad2249ee67b 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -191,6 +191,9 @@ void drm_gem_unpin(struct drm_gem_object *obj);
 int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
 void drm_gem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
 
+int drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
+			 u32 handle);
+
 /* drm_debugfs.c drm_debugfs_crc.c */
 #if defined(CONFIG_DEBUG_FS)
 int drm_debugfs_init(struct drm_minor *minor, int minor_id,
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index 6dba4b8ce4fe..5370e6b492fd 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -24,6 +24,8 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/export.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
 
@@ -36,6 +38,9 @@
 #include "drm_legacy.h"
 
 #ifdef CONFIG_DRM_LEGACY
+/* List of devices hanging off drivers with stealth attach. */
+static LIST_HEAD(legacy_dev_list);
+static DEFINE_MUTEX(legacy_dev_list_lock);
 
 /**
  * drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
@@ -196,7 +201,7 @@ static void drm_pci_agp_init(struct drm_device *dev)
 
 static int drm_get_pci_dev(struct pci_dev *pdev,
 			   const struct pci_device_id *ent,
-			   struct drm_driver *driver)
+			   const struct drm_driver *driver)
 {
 	struct drm_device *dev;
 	int ret;
@@ -225,10 +230,11 @@ static int drm_get_pci_dev(struct pci_dev *pdev,
 	if (ret)
 		goto err_agp;
 
-	/* No locking needed since shadow-attach is single-threaded since it may
-	 * only be called from the per-driver module init hook. */
-	if (drm_core_check_feature(dev, DRIVER_LEGACY))
-		list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
+	if (drm_core_check_feature(dev, DRIVER_LEGACY)) {
+		mutex_lock(&legacy_dev_list_lock);
+		list_add_tail(&dev->legacy_dev_list, &legacy_dev_list);
+		mutex_unlock(&legacy_dev_list_lock);
+	}
 
 	return 0;
 
@@ -249,7 +255,8 @@ err_free:
  *
  * Return: 0 on success or a negative error code on failure.
  */
-int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
+int drm_legacy_pci_init(const struct drm_driver *driver,
+			struct pci_driver *pdriver)
 {
 	struct pci_dev *pdev = NULL;
 	const struct pci_device_id *pid;
@@ -261,7 +268,6 @@ int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
 		return -EINVAL;
 
 	/* If not using KMS, fall back to stealth mode manual scanning. */
-	INIT_LIST_HEAD(&driver->legacy_dev_list);
 	for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
 		pid = &pdriver->id_table[i];
 
@@ -295,7 +301,8 @@ EXPORT_SYMBOL(drm_legacy_pci_init);
  * Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
  * is deprecated and only used by dri1 drivers.
  */
-void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
+void drm_legacy_pci_exit(const struct drm_driver *driver,
+			 struct pci_driver *pdriver)
 {
 	struct drm_device *dev, *tmp;
 
@@ -304,11 +311,15 @@ void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
 	if (!(driver->driver_features & DRIVER_LEGACY)) {
 		WARN_ON(1);
 	} else {
-		list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
+		mutex_lock(&legacy_dev_list_lock);
+		list_for_each_entry_safe(dev, tmp, &legacy_dev_list,
 					 legacy_dev_list) {
-			list_del(&dev->legacy_dev_list);
-			drm_put_dev(dev);
+			if (dev->driver == driver) {
+				list_del(&dev->legacy_dev_list);
+				drm_put_dev(dev);
+			}
 		}
+		mutex_unlock(&legacy_dev_list_lock);
 	}
 	DRM_INFO("Module unloaded\n");
 }
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index d6017726cc2a..ad59a51eab6d 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -515,7 +515,8 @@ retry:
 	if (count == 0 && connector->status == connector_status_connected)
 		count = drm_add_override_edid_modes(connector);
 
-	if (count == 0 && connector->status == connector_status_connected)
+	if (count == 0 && (connector->status == connector_status_connected ||
+			   connector->status == connector_status_unknown))
 		count = drm_add_modes_noedid(connector, 1024, 768);
 	count += drm_helper_probe_add_cmdline_mode(connector);
 	if (count == 0)
diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
index 66df3aade088..f64e06e1067d 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.c
+++ b/drivers/gpu/drm/kmb/kmb_drv.c
@@ -400,7 +400,7 @@ static void kmb_irq_reset(struct drm_device *drm)
 
 DEFINE_DRM_GEM_CMA_FOPS(fops);
 
-static struct drm_driver kmb_driver = {
+static const struct drm_driver kmb_driver = {
 	.driver_features = DRIVER_GEM |
 	    DRIVER_MODESET | DRIVER_ATOMIC,
 	.irq_handler = kmb_isr,
diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c
index c578095b09a5..382d53f8a22e 100644
--- a/drivers/gpu/drm/rcar-du/rcar_cmm.c
+++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c
@@ -122,7 +122,7 @@ int rcar_cmm_enable(struct platform_device *pdev)
 {
 	int ret;
 
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index f93e0750431d..ea7e39d03545 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -730,13 +730,10 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
 	 */
 	if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index) &&
 	    rstate->outputs == BIT(RCAR_DU_OUTPUT_DPAD0)) {
-		struct rcar_du_encoder *encoder =
-			rcdu->encoders[RCAR_DU_OUTPUT_LVDS0 + rcrtc->index];
+		struct drm_bridge *bridge = rcdu->lvds[rcrtc->index];
 		const struct drm_display_mode *mode =
 			&crtc->state->adjusted_mode;
-		struct drm_bridge *bridge;
 
-		bridge = drm_bridge_chain_get_first_bridge(&encoder->base);
 		rcar_lvds_clk_enable(bridge, mode->clock * 1000);
 	}
 
@@ -764,15 +761,12 @@ static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
 
 	if (rcdu->info->lvds_clk_mask & BIT(rcrtc->index) &&
 	    rstate->outputs == BIT(RCAR_DU_OUTPUT_DPAD0)) {
-		struct rcar_du_encoder *encoder =
-			rcdu->encoders[RCAR_DU_OUTPUT_LVDS0 + rcrtc->index];
-		struct drm_bridge *bridge;
+		struct drm_bridge *bridge = rcdu->lvds[rcrtc->index];
 
 		/*
 		 * Disable the LVDS clock output, see
 		 * rcar_du_crtc_atomic_enable().
 		 */
-		bridge = drm_bridge_chain_get_first_bridge(&encoder->base);
 		rcar_lvds_clk_disable(bridge);
 	}
 
@@ -1256,7 +1250,7 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
 	else
 		primary = &rgrp->planes[swindex % 2].plane;
 
-	ret = drm_crtc_init_with_planes(rcdu->ddev, crtc, primary, NULL,
+	ret = drm_crtc_init_with_planes(&rcdu->ddev, crtc, primary, NULL,
 					rcdu->info->gen <= 2 ?
 					&crtc_funcs_gen2 : &crtc_funcs_gen3,
 					NULL);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 600056dff374..bfbff90588cb 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -18,10 +18,11 @@
 #include <linux/wait.h>
 
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_fb_helper.h>
-#include <drm/drm_drv.h>
 #include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
 
 #include "rcar_du_drv.h"
@@ -527,14 +528,14 @@ static int rcar_du_pm_suspend(struct device *dev)
 {
 	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 
-	return drm_mode_config_helper_suspend(rcdu->ddev);
+	return drm_mode_config_helper_suspend(&rcdu->ddev);
 }
 
 static int rcar_du_pm_resume(struct device *dev)
 {
 	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 
-	return drm_mode_config_helper_resume(rcdu->ddev);
+	return drm_mode_config_helper_resume(&rcdu->ddev);
 }
 #endif
 
@@ -549,7 +550,7 @@ static const struct dev_pm_ops rcar_du_pm_ops = {
 static int rcar_du_remove(struct platform_device *pdev)
 {
 	struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
-	struct drm_device *ddev = rcdu->ddev;
+	struct drm_device *ddev = &rcdu->ddev;
 
 	drm_dev_unregister(ddev);
 
@@ -563,14 +564,14 @@ static int rcar_du_remove(struct platform_device *pdev)
 static int rcar_du_probe(struct platform_device *pdev)
 {
 	struct rcar_du_device *rcdu;
-	struct drm_device *ddev;
 	struct resource *mem;
 	int ret;
 
 	/* Allocate and initialize the R-Car device structure. */
-	rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
-	if (rcdu == NULL)
-		return -ENOMEM;
+	rcdu = devm_drm_dev_alloc(&pdev->dev, &rcar_du_driver,
+				  struct rcar_du_device, ddev);
+	if (IS_ERR(rcdu))
+		return PTR_ERR(rcdu);
 
 	rcdu->dev = &pdev->dev;
 	rcdu->info = of_device_get_match_data(rcdu->dev);
@@ -584,13 +585,6 @@ static int rcar_du_probe(struct platform_device *pdev)
 		return PTR_ERR(rcdu->mmio);
 
 	/* DRM/KMS objects */
-	ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
-	if (IS_ERR(ddev))
-		return PTR_ERR(ddev);
-
-	rcdu->ddev = ddev;
-	ddev->dev_private = rcdu;
-
 	ret = rcar_du_modeset_init(rcdu);
 	if (ret < 0) {
 		if (ret != -EPROBE_DEFER)
@@ -599,25 +593,24 @@ static int rcar_du_probe(struct platform_device *pdev)
 		goto error;
 	}
 
-	ddev->irq_enabled = 1;
+	rcdu->ddev.irq_enabled = 1;
 
 	/*
 	 * Register the DRM device with the core and the connectors with
 	 * sysfs.
 	 */
-	ret = drm_dev_register(ddev, 0);
+	ret = drm_dev_register(&rcdu->ddev, 0);
 	if (ret)
 		goto error;
 
 	DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
 
-	drm_fbdev_generic_setup(ddev, 32);
+	drm_fbdev_generic_setup(&rcdu->ddev, 32);
 
 	return 0;
 
 error:
-	rcar_du_remove(pdev);
-
+	drm_kms_helper_poll_fini(&rcdu->ddev);
 	return ret;
 }
 
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 61504c54e2ec..02ca2d0e1b55 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -13,6 +13,8 @@
 #include <linux/kernel.h>
 #include <linux/wait.h>
 
+#include <drm/drm_device.h>
+
 #include "rcar_cmm.h"
 #include "rcar_du_crtc.h"
 #include "rcar_du_group.h"
@@ -20,10 +22,9 @@
 
 struct clk;
 struct device;
-struct drm_device;
+struct drm_bridge;
 struct drm_property;
 struct rcar_du_device;
-struct rcar_du_encoder;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock */
 #define RCAR_DU_FEATURE_VSP1_SOURCE	BIT(1)	/* Has inputs from VSP1 */
@@ -71,6 +72,7 @@ struct rcar_du_device_info {
 #define RCAR_DU_MAX_CRTCS		4
 #define RCAR_DU_MAX_GROUPS		DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
 #define RCAR_DU_MAX_VSPS		4
+#define RCAR_DU_MAX_LVDS		2
 
 struct rcar_du_device {
 	struct device *dev;
@@ -78,16 +80,15 @@ struct rcar_du_device {
 
 	void __iomem *mmio;
 
-	struct drm_device *ddev;
+	struct drm_device ddev;
 
 	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
 	unsigned int num_crtcs;
 
-	struct rcar_du_encoder *encoders[RCAR_DU_OUTPUT_MAX];
-
 	struct rcar_du_group groups[RCAR_DU_MAX_GROUPS];
 	struct platform_device *cmms[RCAR_DU_MAX_CRTCS];
 	struct rcar_du_vsp vsps[RCAR_DU_MAX_VSPS];
+	struct drm_bridge *lvds[RCAR_DU_MAX_LVDS];
 
 	struct {
 		struct drm_property *colorkey;
@@ -98,6 +99,11 @@ struct rcar_du_device {
 	unsigned int vspd1_sink;
 };
 
+static inline struct rcar_du_device *to_rcar_du_device(struct drm_device *dev)
+{
+	return container_of(dev, struct rcar_du_device, ddev);
+}
+
 static inline bool rcar_du_has(struct rcar_du_device *rcdu,
 			       unsigned int feature)
 {
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index b0335da0c161..ba8c6038cd63 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -8,12 +8,13 @@
  */
 
 #include <linux/export.h>
+#include <linux/slab.h>
 
 #include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
+#include <drm/drm_managed.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_panel.h>
-#include <drm/drm_simple_kms_helper.h>
 
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
@@ -44,26 +45,25 @@ static unsigned int rcar_du_encoder_count_ports(struct device_node *node)
 	return num_ports;
 }
 
+static const struct drm_encoder_funcs rcar_du_encoder_funcs = {
+};
+
+static void rcar_du_encoder_release(struct drm_device *dev, void *res)
+{
+	struct rcar_du_encoder *renc = res;
+
+	drm_encoder_cleanup(&renc->base);
+	kfree(renc);
+}
+
 int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 			 enum rcar_du_output output,
 			 struct device_node *enc_node)
 {
 	struct rcar_du_encoder *renc;
-	struct drm_encoder *encoder;
 	struct drm_bridge *bridge;
 	int ret;
 
-	renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
-	if (renc == NULL)
-		return -ENOMEM;
-
-	rcdu->encoders[output] = renc;
-	renc->output = output;
-	encoder = rcar_encoder_to_drm_encoder(renc);
-
-	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
-		enc_node, output);
-
 	/*
 	 * Locate the DRM bridge from the DT node. For the DPAD outputs, if the
 	 * DT node has a single port, assume that it describes a panel and
@@ -74,57 +74,57 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 	    rcar_du_encoder_count_ports(enc_node) == 1) {
 		struct drm_panel *panel = of_drm_find_panel(enc_node);
 
-		if (IS_ERR(panel)) {
-			ret = PTR_ERR(panel);
-			goto done;
-		}
+		if (IS_ERR(panel))
+			return PTR_ERR(panel);
 
 		bridge = devm_drm_panel_bridge_add_typed(rcdu->dev, panel,
 							 DRM_MODE_CONNECTOR_DPI);
-		if (IS_ERR(bridge)) {
-			ret = PTR_ERR(bridge);
-			goto done;
-		}
+		if (IS_ERR(bridge))
+			return PTR_ERR(bridge);
 	} else {
 		bridge = of_drm_find_bridge(enc_node);
-		if (!bridge) {
-			ret = -EPROBE_DEFER;
-			goto done;
-		}
+		if (!bridge)
+			return -EPROBE_DEFER;
+
+		if (output == RCAR_DU_OUTPUT_LVDS0 ||
+		    output == RCAR_DU_OUTPUT_LVDS1)
+			rcdu->lvds[output - RCAR_DU_OUTPUT_LVDS0] = bridge;
 	}
 
 	/*
-	 * On Gen3 skip the LVDS1 output if the LVDS1 encoder is used as a
-	 * companion for LVDS0 in dual-link mode.
+	 * Create and initialize the encoder. On Gen3 skip the LVDS1 output if
+	 * the LVDS1 encoder is used as a companion for LVDS0 in dual-link
+	 * mode.
 	 */
 	if (rcdu->info->gen >= 3 && output == RCAR_DU_OUTPUT_LVDS1) {
-		if (rcar_lvds_dual_link(bridge)) {
-			ret = -ENOLINK;
-			goto done;
-		}
+		if (rcar_lvds_dual_link(bridge))
+			return -ENOLINK;
 	}
 
-	ret = drm_simple_encoder_init(rcdu->ddev, encoder,
-				      DRM_MODE_ENCODER_NONE);
-	if (ret < 0)
-		goto done;
+	renc = kzalloc(sizeof(*renc), GFP_KERNEL);
+	if (renc == NULL)
+		return -ENOMEM;
 
-	/*
-	 * Attach the bridge to the encoder. The bridge will create the
-	 * connector.
-	 */
-	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
-	if (ret) {
-		drm_encoder_cleanup(encoder);
-		return ret;
-	}
+	renc->output = output;
+
+	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
+		enc_node, output);
 
-done:
+	ret = drm_encoder_init(&rcdu->ddev, &renc->base, &rcar_du_encoder_funcs,
+			       DRM_MODE_ENCODER_NONE, NULL);
 	if (ret < 0) {
-		if (encoder->name)
-			encoder->funcs->destroy(encoder);
-		devm_kfree(rcdu->dev, renc);
+		kfree(renc);
+		return ret;
 	}
 
-	return ret;
+	ret = drmm_add_action_or_reset(&rcdu->ddev, rcar_du_encoder_release,
+				       renc);
+	if (ret)
+		return ret;
+
+	/*
+	 * Attach the bridge to the encoder. The bridge will create the
+	 * connector.
+	 */
+	return drm_bridge_attach(&renc->base, bridge, NULL, 0);
 }
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
index df9be4524301..73560563fb31 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.h
@@ -22,8 +22,6 @@ struct rcar_du_encoder {
 #define to_rcar_encoder(e) \
 	container_of(e, struct rcar_du_encoder, base)
 
-#define rcar_encoder_to_drm_encoder(e)	(&(e)->base)
-
 int rcar_du_encoder_init(struct rcar_du_device *rcdu,
 			 enum rcar_du_output output,
 			 struct device_node *enc_node);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 72dda446355f..fdb8a0d127ad 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -14,6 +14,7 @@
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
 
@@ -327,7 +328,7 @@ const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
 			struct drm_mode_create_dumb *args)
 {
-	struct rcar_du_device *rcdu = dev->dev_private;
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
 	unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
 	unsigned int align;
 
@@ -349,7 +350,7 @@ static struct drm_framebuffer *
 rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 		  const struct drm_mode_fb_cmd2 *mode_cmd)
 {
-	struct rcar_du_device *rcdu = dev->dev_private;
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
 	const struct rcar_du_format_info *format;
 	unsigned int chroma_pitch;
 	unsigned int max_pitch;
@@ -421,7 +422,7 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 static int rcar_du_atomic_check(struct drm_device *dev,
 				struct drm_atomic_state *state)
 {
-	struct rcar_du_device *rcdu = dev->dev_private;
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
 	int ret;
 
 	ret = drm_atomic_helper_check(dev, state);
@@ -437,7 +438,7 @@ static int rcar_du_atomic_check(struct drm_device *dev,
 static void rcar_du_atomic_commit_tail(struct drm_atomic_state *old_state)
 {
 	struct drm_device *dev = old_state->dev;
-	struct rcar_du_device *rcdu = dev->dev_private;
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
 	struct drm_crtc_state *crtc_state;
 	struct drm_crtc *crtc;
 	unsigned int i;
@@ -583,7 +584,7 @@ static int rcar_du_properties_init(struct rcar_du_device *rcdu)
 	 * or enable source color keying (1).
 	 */
 	rcdu->props.colorkey =
-		drm_property_create_range(rcdu->ddev, 0, "colorkey",
+		drm_property_create_range(&rcdu->ddev, 0, "colorkey",
 					  0, 0x01ffffff);
 	if (rcdu->props.colorkey == NULL)
 		return -ENOMEM;
@@ -700,10 +701,10 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
 		int ret;
 
 		cmm = of_parse_phandle(np, "renesas,cmms", i);
-		if (IS_ERR(cmm)) {
+		if (!cmm) {
 			dev_err(rcdu->dev,
 				"Failed to parse 'renesas,cmms' property\n");
-			return PTR_ERR(cmm);
+			return -EINVAL;
 		}
 
 		if (!of_device_is_available(cmm)) {
@@ -713,10 +714,10 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
 		}
 
 		pdev = of_find_device_by_node(cmm);
-		if (IS_ERR(pdev)) {
+		if (!pdev) {
 			dev_err(rcdu->dev, "No device found for CMM%u\n", i);
 			of_node_put(cmm);
-			return PTR_ERR(pdev);
+			return -EINVAL;
 		}
 
 		of_node_put(cmm);
@@ -726,8 +727,12 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
 		 * disabled: return 0 and let the DU continue probing.
 		 */
 		ret = rcar_cmm_init(pdev);
-		if (ret)
+		if (ret) {
+			platform_device_put(pdev);
 			return ret == -ENODEV ? 0 : ret;
+		}
+
+		rcdu->cmms[i] = pdev;
 
 		/*
 		 * Enforce suspend/resume ordering by making the CMM a provider
@@ -739,20 +744,27 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
 				"Failed to create device link to CMM%u\n", i);
 			return -EINVAL;
 		}
-
-		rcdu->cmms[i] = pdev;
 	}
 
 	return 0;
 }
 
+static void rcar_du_modeset_cleanup(struct drm_device *dev, void *res)
+{
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(rcdu->cmms); ++i)
+		platform_device_put(rcdu->cmms[i]);
+}
+
 int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 {
 	static const unsigned int mmio_offsets[] = {
 		DU0_REG_OFFSET, DU2_REG_OFFSET
 	};
 
-	struct drm_device *dev = rcdu->ddev;
+	struct drm_device *dev = &rcdu->ddev;
 	struct drm_encoder *encoder;
 	unsigned int dpad0_sources;
 	unsigned int num_encoders;
@@ -766,6 +778,10 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 	if (ret)
 		return ret;
 
+	ret = drmm_add_action(&rcdu->ddev, rcar_du_modeset_cleanup, NULL);
+	if (ret)
+		return ret;
+
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 	dev->mode_config.normalize_zpos = true;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
index a0021fc25b27..02e5f11f38eb 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
@@ -128,7 +128,7 @@ static int rcar_du_plane_hwalloc(struct rcar_du_plane *plane,
 int rcar_du_atomic_check_planes(struct drm_device *dev,
 				struct drm_atomic_state *state)
 {
-	struct rcar_du_device *rcdu = dev->dev_private;
+	struct rcar_du_device *rcdu = to_rcar_du_device(dev);
 	unsigned int group_freed_planes[RCAR_DU_MAX_GROUPS] = { 0, };
 	unsigned int group_free_planes[RCAR_DU_MAX_GROUPS] = { 0, };
 	bool needs_realloc = false;
@@ -773,9 +773,9 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp)
 
 		plane->group = rgrp;
 
-		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
-					       &rcar_du_plane_funcs, formats,
-					       ARRAY_SIZE(formats),
+		ret = drm_universal_plane_init(&rcdu->ddev, &plane->plane,
+					       crtcs, &rcar_du_plane_funcs,
+					       formats, ARRAY_SIZE(formats),
 					       NULL, type, NULL);
 		if (ret < 0)
 			return ret;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index f6a69aa116e6..53221d8473c1 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -21,6 +21,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/of_platform.h>
 #include <linux/scatterlist.h>
+#include <linux/slab.h>
 #include <linux/videodev2.h>
 
 #include <media/vsp1.h>
@@ -344,6 +345,15 @@ static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
 static void rcar_du_vsp_cleanup(struct drm_device *dev, void *res)
 {
 	struct rcar_du_vsp *vsp = res;
+	unsigned int i;
+
+	for (i = 0; i < vsp->num_planes; ++i) {
+		struct rcar_du_vsp_plane *plane = &vsp->planes[i];
+
+		drm_plane_cleanup(&plane->plane);
+	}
+
+	kfree(vsp->planes);
 
 	put_device(vsp->vsp);
 }
@@ -354,6 +364,7 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 	struct rcar_du_device *rcdu = vsp->dev;
 	struct platform_device *pdev;
 	unsigned int num_crtcs = hweight32(crtcs);
+	unsigned int num_planes;
 	unsigned int i;
 	int ret;
 
@@ -364,7 +375,7 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 
 	vsp->vsp = &pdev->dev;
 
-	ret = drmm_add_action(rcdu->ddev, rcar_du_vsp_cleanup, vsp);
+	ret = drmm_add_action_or_reset(&rcdu->ddev, rcar_du_vsp_cleanup, vsp);
 	if (ret < 0)
 		return ret;
 
@@ -376,14 +387,13 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 	  * The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
 	  * 4 RPFs.
 	  */
-	vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;
+	num_planes = rcdu->info->gen >= 3 ? 5 : 4;
 
-	vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
-				   sizeof(*vsp->planes), GFP_KERNEL);
+	vsp->planes = kcalloc(num_planes, sizeof(*vsp->planes), GFP_KERNEL);
 	if (!vsp->planes)
 		return -ENOMEM;
 
-	for (i = 0; i < vsp->num_planes; ++i) {
+	for (i = 0; i < num_planes; ++i) {
 		enum drm_plane_type type = i < num_crtcs
 					 ? DRM_PLANE_TYPE_PRIMARY
 					 : DRM_PLANE_TYPE_OVERLAY;
@@ -392,8 +402,8 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 		plane->vsp = vsp;
 		plane->index = i;
 
-		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
-					       &rcar_du_vsp_plane_funcs,
+		ret = drm_universal_plane_init(&rcdu->ddev, &plane->plane,
+					       crtcs, &rcar_du_vsp_plane_funcs,
 					       rcar_du_vsp_formats,
 					       ARRAY_SIZE(rcar_du_vsp_formats),
 					       NULL, type, NULL);
@@ -409,8 +419,10 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 		} else {
 			drm_plane_create_alpha_property(&plane->plane);
 			drm_plane_create_zpos_property(&plane->plane, 1, 1,
-						       vsp->num_planes - 1);
+						       num_planes - 1);
 		}
+
+		vsp->num_planes++;
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_writeback.c b/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
index 04efa78d70b6..c79d1259e49b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_writeback.c
@@ -204,7 +204,7 @@ int rcar_du_writeback_init(struct rcar_du_device *rcdu,
 	drm_connector_helper_add(&wb_conn->base,
 				 &rcar_du_wb_conn_helper_funcs);
 
-	return drm_writeback_connector_init(rcdu->ddev, wb_conn,
+	return drm_writeback_connector_init(&rcdu->ddev, wb_conn,
 					    &rcar_du_wb_conn_funcs,
 					    &rcar_du_wb_enc_helper_funcs,
 					    writeback_formats,
diff --git a/drivers/gpu/drm/sti/sti_cursor.c b/drivers/gpu/drm/sti/sti_cursor.c
index a98057431023..7476301d7142 100644
--- a/drivers/gpu/drm/sti/sti_cursor.c
+++ b/drivers/gpu/drm/sti/sti_cursor.c
@@ -330,13 +330,6 @@ static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
 	.atomic_disable = sti_cursor_atomic_disable,
 };
 
-static void sti_cursor_destroy(struct drm_plane *drm_plane)
-{
-	DRM_DEBUG_DRIVER("\n");
-
-	drm_plane_cleanup(drm_plane);
-}
-
 static int sti_cursor_late_register(struct drm_plane *drm_plane)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);
@@ -350,7 +343,7 @@ static int sti_cursor_late_register(struct drm_plane *drm_plane)
 static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = sti_cursor_destroy,
+	.destroy = drm_plane_cleanup,
 	.reset = sti_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
index 2d5a2b5b78b8..2f4a34f14d33 100644
--- a/drivers/gpu/drm/sti/sti_gdp.c
+++ b/drivers/gpu/drm/sti/sti_gdp.c
@@ -884,13 +884,6 @@ static const struct drm_plane_helper_funcs sti_gdp_helpers_funcs = {
 	.atomic_disable = sti_gdp_atomic_disable,
 };
 
-static void sti_gdp_destroy(struct drm_plane *drm_plane)
-{
-	DRM_DEBUG_DRIVER("\n");
-
-	drm_plane_cleanup(drm_plane);
-}
-
 static int sti_gdp_late_register(struct drm_plane *drm_plane)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);
@@ -902,7 +895,7 @@ static int sti_gdp_late_register(struct drm_plane *drm_plane)
 static const struct drm_plane_funcs sti_gdp_plane_helpers_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = sti_gdp_destroy,
+	.destroy = drm_plane_cleanup,
 	.reset = sti_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c
index 5a4e12194a77..62f824cd5f21 100644
--- a/drivers/gpu/drm/sti/sti_hqvdp.c
+++ b/drivers/gpu/drm/sti/sti_hqvdp.c
@@ -1262,13 +1262,6 @@ static const struct drm_plane_helper_funcs sti_hqvdp_helpers_funcs = {
 	.atomic_disable = sti_hqvdp_atomic_disable,
 };
 
-static void sti_hqvdp_destroy(struct drm_plane *drm_plane)
-{
-	DRM_DEBUG_DRIVER("\n");
-
-	drm_plane_cleanup(drm_plane);
-}
-
 static int sti_hqvdp_late_register(struct drm_plane *drm_plane)
 {
 	struct sti_plane *plane = to_sti_plane(drm_plane);
@@ -1282,7 +1275,7 @@ static int sti_hqvdp_late_register(struct drm_plane *drm_plane)
 static const struct drm_plane_funcs sti_hqvdp_plane_helpers_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = sti_hqvdp_destroy,
+	.destroy = drm_plane_cleanup,
 	.reset = sti_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
diff --git a/drivers/gpu/drm/tdfx/tdfx_drv.c b/drivers/gpu/drm/tdfx/tdfx_drv.c
index ab699bf0ac5c..58c185c299f4 100644
--- a/drivers/gpu/drm/tdfx/tdfx_drv.c
+++ b/drivers/gpu/drm/tdfx/tdfx_drv.c
@@ -56,7 +56,7 @@ static const struct file_operations tdfx_driver_fops = {
 	.llseek = noop_llseek,
 };
 
-static struct drm_driver driver = {
+static const struct drm_driver driver = {
 	.driver_features = DRIVER_LEGACY,
 	.fops = &tdfx_driver_fops,
 	.name = DRIVER_NAME,
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 6b39cc2ca18d..6bd8260aa9f2 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -1268,11 +1268,6 @@ static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
 	.atomic_async_update = vc4_plane_atomic_async_update,
 };
 
-static void vc4_plane_destroy(struct drm_plane *plane)
-{
-	drm_plane_cleanup(plane);
-}
-
 static bool vc4_format_mod_supported(struct drm_plane *plane,
 				     uint32_t format,
 				     uint64_t modifier)
@@ -1323,7 +1318,7 @@ static bool vc4_format_mod_supported(struct drm_plane *plane,
 static const struct drm_plane_funcs vc4_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = vc4_plane_destroy,
+	.destroy = drm_plane_cleanup,
 	.set_property = NULL,
 	.reset = vc4_plane_reset,
 	.atomic_duplicate_state = vc4_plane_duplicate_state,
diff --git a/drivers/gpu/drm/zte/zx_plane.c b/drivers/gpu/drm/zte/zx_plane.c
index c8f7b21fa09e..78d787afe594 100644
--- a/drivers/gpu/drm/zte/zx_plane.c
+++ b/drivers/gpu/drm/zte/zx_plane.c
@@ -438,15 +438,10 @@ static const struct drm_plane_helper_funcs zx_gl_plane_helper_funcs = {
 	.atomic_disable = zx_plane_atomic_disable,
 };
 
-static void zx_plane_destroy(struct drm_plane *plane)
-{
-	drm_plane_cleanup(plane);
-}
-
 static const struct drm_plane_funcs zx_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = zx_plane_destroy,
+	.destroy = drm_plane_cleanup,
 	.reset = drm_atomic_helper_plane_reset,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,