Merge tag 'drm-misc-fixes-2026-04-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

This week in drm-misc-fixes, we have:
- A patch to raise the vblank timeout to avoid it on virtual drivers
- a state check fix for stm_lvds
- a use-after-free fix for dma-buf
- a mapping fix for panthor
- a device_node reference leak fix for arcgpu
- a bridge reference leak fix for dw-mipi-dsi
- a sparse warning fix for dma-fence
- a kconfig fix for hv
- a memory leak fix for nouveau
- a fix to duplicate colorop when duplicating states
- a panel initialisation order fix for visionox-rm69299
- a fix to prevent an infinite loop for v3d
- an overflow fix for nouveau

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@redhat.com>
Link: https://patch.msgid.link/20260423-realistic-eager-reindeer-4dacf7@houat

MAINTAINERS

@@ -8607,10 +8607,17 @@ S:	Maintained
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
 F:	drivers/gpu/drm/gma500/
 
-DRM DRIVERS FOR HISILICON
-M:	Xinliang Liu <xinliang.liu@linaro.org>
+DRM DRIVERS FOR HISILICON HIBMC
+M:	Yongbang Shi <shiyongbang@huawei.com>
 M:	Tian Tao  <tiantao6@hisilicon.com>
 R:	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+L:	dri-devel@lists.freedesktop.org
+S:	Maintained
+T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
+F:	drivers/gpu/drm/hisilicon/hibmc
+
+DRM DRIVERS FOR HISILICON KIRIN
+M:	Xinliang Liu <xinliang.liu@linaro.org>
 R:	Sumit Semwal <sumit.semwal@linaro.org>
 R:	Yongqin Liu <yongqin.liu@linaro.org>
 R:	John Stultz <jstultz@google.com>
@@ -8618,7 +8625,7 @@ L:	dri-devel@lists.freedesktop.org
 S:	Maintained
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
 F:	Documentation/devicetree/bindings/display/hisilicon/
-F:	drivers/gpu/drm/hisilicon/
+F:	drivers/gpu/drm/hisilicon/kirin
 
 DRM DRIVERS FOR LIMA
 M:	Qiang Yu <yuq825@gmail.com>

drivers/dma-buf/dma-buf.c

@@ -845,9 +845,8 @@ void dma_buf_put(struct dma_buf *dmabuf)
 	if (WARN_ON(!dmabuf || !dmabuf->file))
 		return;
 
-	fput(dmabuf->file);
-
 	DMA_BUF_TRACE(trace_dma_buf_put, dmabuf);
+	fput(dmabuf->file);
 }
 EXPORT_SYMBOL_NS_GPL(dma_buf_put, "DMA_BUF");
 

drivers/dma-buf/dma-fence.c

@@ -1021,8 +1021,8 @@ EXPORT_SYMBOL(dma_fence_set_deadline);
  */
 void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq)
 {
-	const char __rcu *timeline = "";
-	const char __rcu *driver = "";
+	const char __rcu *timeline = (const char __rcu *)"";
+	const char __rcu *driver = (const char __rcu *)"";
 	const char *signaled = "";
 
 	rcu_read_lock();

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c

@@ -345,10 +345,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
 	if (pdata->host_ops && pdata->host_ops->attach) {
 		ret = pdata->host_ops->attach(pdata->priv_data, device);
 		if (ret < 0)
-			return ret;
+			goto err_remove_bridge;
 	}
 
 	return 0;
+
+err_remove_bridge:
+	drm_bridge_remove(&dsi->bridge);
+	return ret;
 }
 
 static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi2.c

@@ -540,10 +540,14 @@ static int dw_mipi_dsi2_host_attach(struct mipi_dsi_host *host,
 	if (pdata->host_ops && pdata->host_ops->attach) {
 		ret = pdata->host_ops->attach(pdata->priv_data, device);
 		if (ret < 0)
-			return ret;
+			goto err_remove_bridge;
 	}
 
 	return 0;
+
+err_remove_bridge:
+	drm_bridge_remove(&dsi2->bridge);
+	return ret;
 }
 
 static int dw_mipi_dsi2_host_detach(struct mipi_dsi_host *host,

drivers/gpu/drm/drm_atomic_helper.c

@@ -1916,7 +1916,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
 		ret = wait_event_timeout(*queue,
 					 state->crtcs[i].last_vblank_count !=
 						drm_crtc_vblank_count(crtc),
-					 msecs_to_jiffies(100));
+					 msecs_to_jiffies(1000));
 
 		WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
 		     crtc->base.id, crtc->name);
@@ -3751,6 +3751,13 @@ drm_atomic_helper_duplicate_state(struct drm_device *dev,
 			err = PTR_ERR(plane_state);
 			goto free;
 		}
+
+		if (plane_state->color_pipeline) {
+			err = drm_atomic_add_affected_colorops(state, plane);
+			if (err)
+				goto free;
+		}
+
 	}
 
 	drm_connector_list_iter_begin(dev, &conn_iter);
@@ -3856,6 +3863,8 @@ int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
 	int i, ret;
 	struct drm_plane *plane;
 	struct drm_plane_state *new_plane_state;
+	struct drm_colorop *colorop;
+	struct drm_colorop_state *new_colorop_state;
 	struct drm_connector *connector;
 	struct drm_connector_state *new_conn_state;
 	struct drm_crtc *crtc;
@@ -3863,6 +3872,9 @@ int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
 
 	state->acquire_ctx = ctx;
 
+	for_each_new_colorop_in_state(state, colorop, new_colorop_state, i)
+		state->colorops[i].old_state = colorop->state;
+
 	for_each_new_plane_in_state(state, plane, new_plane_state, i)
 		state->planes[i].old_state = plane->state;
 

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -874,7 +874,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev,
 	/* Remove conflicting drivers (vesafb, efifb etc). */
 	ret = aperture_remove_conflicting_pci_devices(pdev, driver_pci.name);
 	if (ret)
-		return ret;
+		goto fail_nvkm;
 
 	pci_set_master(pdev);
 

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -686,7 +686,7 @@ nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
 		}
 		nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 
-		if (unlikely(r->reloc_bo_offset + 4 >
+		if (unlikely((u64)r->reloc_bo_offset + 4 >
 			     nvbo->bo.base.size)) {
 			NV_PRINTK(err, cli, "reloc outside of bo\n");
 			ret = -EINVAL;

drivers/gpu/drm/panel/panel-visionox-rm69299.c

@@ -376,6 +376,8 @@ static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
 		return PTR_ERR(ctx->reset_gpio);
 	}
 
+	ctx->panel.prepare_prev_first = true;
+
 	ctx->panel.backlight = visionox_rm69299_create_backlight(ctx);
 	if (IS_ERR(ctx->panel.backlight))
 		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),

drivers/gpu/drm/panthor/panthor_gem.c

@@ -157,7 +157,7 @@ void panthor_kernel_bo_destroy(struct panthor_kernel_bo *bo)
 /**
  * panthor_kernel_bo_create() - Create and map a GEM object to a VM
  * @ptdev: Device.
- * @vm: VM to map the GEM to. If NULL, the kernel object is not GPU mapped.
+ * @vm: VM to map the GEM to.
  * @size: Size of the buffer object.
  * @bo_flags: Combination of drm_panthor_bo_flags flags.
  * @vm_map_flags: Combination of drm_panthor_vm_bind_op_flags (only those

drivers/gpu/drm/panthor/panthor_mmu.c

@@ -1638,6 +1638,25 @@ static int panthor_vm_lock_region(struct panthor_vm *vm, u64 start, u64 size)
 	    start + size <= vm->locked_region.start + vm->locked_region.size)
 		return 0;
 
+	/* sm_step_remap() may need a locked region that isn't a strict superset
+	 * of the original one because of having to extend unmap boundaries beyond
+	 * it to deal with partial unmaps of transparent huge pages. What we want
+	 * in those cases is to lock the union of both regions. The new region must
+	 * always overlap with the original one, because the upper and lower unmap
+	 * boundaries in a remap operation can only shift up or down respectively,
+	 * but never otherwise.
+	 */
+	if (vm->locked_region.size) {
+		u64 end = max(vm->locked_region.start + vm->locked_region.size,
+			      start + size);
+
+		drm_WARN_ON_ONCE(&vm->ptdev->base, (start + size <= vm->locked_region.start) ||
+				 (start >= vm->locked_region.start + vm->locked_region.size));
+
+		start = min(start, vm->locked_region.start);
+		size = end - start;
+	}
+
 	mutex_lock(&ptdev->mmu->as.slots_lock);
 	if (vm->as.id >= 0 && size) {
 		/* Lock the region that needs to be updated */

drivers/gpu/drm/stm/lvds.c

@@ -897,14 +897,14 @@ static int lvds_connector_atomic_check(struct drm_connector *connector,
 	if (!conn_state)
 		return -EINVAL;
 
+	if (!conn_state->crtc)
+		return 0;
+
 	if (list_empty(&connector->modes)) {
 		drm_dbg(connector->dev, "connector: empty modes list\n");
 		return -EINVAL;
 	}
 
-	if (!conn_state->crtc)
-		return -EINVAL;
-
 	panel_mode = list_first_entry(&connector->modes,
 				      struct drm_display_mode, head);
 

drivers/gpu/drm/tiny/arcpgu.c

@@ -250,7 +250,8 @@ DEFINE_DRM_GEM_DMA_FOPS(arcpgu_drm_ops);
 static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
 {
 	struct platform_device *pdev = to_platform_device(arcpgu->drm.dev);
-	struct device_node *encoder_node = NULL, *endpoint_node = NULL;
+	struct device_node *encoder_node __free(device_node) = NULL;
+	struct device_node *endpoint_node = NULL;
 	struct drm_connector *connector = NULL;
 	struct drm_device *drm = &arcpgu->drm;
 	int ret;

drivers/gpu/drm/v3d/v3d_submit.c

@@ -393,6 +393,11 @@ v3d_get_multisync_submit_deps(struct drm_file *file_priv,
 	if (multisync.pad)
 		return -EINVAL;
 
+	if (!multisync.in_sync_count && !multisync.out_sync_count) {
+		drm_dbg(&v3d->drm, "Empty multisync extension\n");
+		return -EINVAL;
+	}
+
 	ret = v3d_get_multisync_post_deps(file_priv, se, multisync.out_sync_count,
 					  multisync.out_syncs);
 	if (ret)

drivers/hv/Kconfig

@@ -9,7 +9,6 @@ config HYPERV
 	select PARAVIRT
 	select X86_HV_CALLBACK_VECTOR if X86
 	select OF_EARLY_FLATTREE if OF
-	select SYSFB if EFI && !HYPERV_VTL_MODE
 	select IRQ_MSI_LIB if X86
 	help
 	  Select this option to run Linux as a Hyper-V client operating
@@ -62,6 +61,7 @@ config HYPERV_VMBUS
 	tristate "Microsoft Hyper-V VMBus driver"
 	depends on HYPERV
 	default HYPERV
+	select SYSFB if EFI && !HYPERV_VTL_MODE
 	help
 	  Select this option to enable Hyper-V Vmbus driver.
 

include/drm/drm_atomic.h

@@ -1089,7 +1089,8 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
 		for_each_if ((__state)->colorops[__i].ptr &&		\
 			     ((colorop) = (__state)->colorops[__i].ptr,	\
 			      (void)(colorop) /* Only to avoid unused-but-set-variable warning */, \
-			      (new_colorop_state) = (__state)->colorops[__i].new_state, 1))
+			      (new_colorop_state) = (__state)->colorops[__i].new_state,\
+			      (void)(new_colorop_state) /* Only to avoid unused-but-set-variable warning */, 1))
 
 /**
  * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update