Merge tag 'drm-misc-fixes-2025-10-16' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

Short summary of fixes pull:

ast:
- Fix display output after reboot

bridge:
- lt9211: Fix version check

core:
- draw: Avoid color truncation
- gpuvm: Avoid kernel-doc warning
- sched: Avoid double free

panthor:
- Fix MCU suspend

qaic:
- Init bootlog in correct order
- Treat remaining == 0 as error in find_and_map_user_pages()
- Lock access to DBC request queue

rockchip:
- vop2: Fix destination size in atomic check

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

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20251016141607.GA73919@linux.fritz.box

drivers/accel/qaic/qaic.h

@@ -97,6 +97,8 @@ struct dma_bridge_chan {
 	 * response queue's head and tail pointer of this DBC.
 	 */
 	void __iomem		*dbc_base;
+	/* Synchronizes access to Request queue's head and tail pointer */
+	struct mutex		req_lock;
 	/* Head of list where each node is a memory handle queued in request queue */
 	struct list_head	xfer_list;
 	/* Synchronizes DBC readers during cleanup */

drivers/accel/qaic/qaic_control.c

@@ -407,7 +407,7 @@ static int find_and_map_user_pages(struct qaic_device *qdev,
 		return -EINVAL;
 	remaining = in_trans->size - resources->xferred_dma_size;
 	if (remaining == 0)
-		return 0;
+		return -EINVAL;
 
 	if (check_add_overflow(xfer_start_addr, remaining, &end))
 		return -EINVAL;

drivers/accel/qaic/qaic_data.c

@@ -1356,13 +1356,17 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 		goto release_ch_rcu;
 	}
 
+	ret = mutex_lock_interruptible(&dbc->req_lock);
+	if (ret)
+		goto release_ch_rcu;
+
 	head = readl(dbc->dbc_base + REQHP_OFF);
 	tail = readl(dbc->dbc_base + REQTP_OFF);
 
 	if (head == U32_MAX || tail == U32_MAX) {
 		/* PCI link error */
 		ret = -ENODEV;
-		goto release_ch_rcu;
+		goto unlock_req_lock;
 	}
 
 	queue_level = head <= tail ? tail - head : dbc->nelem - (head - tail);
@@ -1370,11 +1374,12 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 	ret = send_bo_list_to_device(qdev, file_priv, exec, args->hdr.count, is_partial, dbc,
 				     head, &tail);
 	if (ret)
-		goto release_ch_rcu;
+		goto unlock_req_lock;
 
 	/* Finalize commit to hardware */
 	submit_ts = ktime_get_ns();
 	writel(tail, dbc->dbc_base + REQTP_OFF);
+	mutex_unlock(&dbc->req_lock);
 
 	update_profiling_data(file_priv, exec, args->hdr.count, is_partial, received_ts,
 			      submit_ts, queue_level);
@@ -1382,6 +1387,9 @@ static int __qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct dr
 	if (datapath_polling)
 		schedule_work(&dbc->poll_work);
 
+unlock_req_lock:
+	if (ret)
+		mutex_unlock(&dbc->req_lock);
 release_ch_rcu:
 	srcu_read_unlock(&dbc->ch_lock, rcu_id);
 unlock_dev_srcu:

drivers/accel/qaic/qaic_debugfs.c

@@ -218,6 +218,9 @@ static int qaic_bootlog_mhi_probe(struct mhi_device *mhi_dev, const struct mhi_d
 	if (ret)
 		goto destroy_workqueue;
 
+	dev_set_drvdata(&mhi_dev->dev, qdev);
+	qdev->bootlog_ch = mhi_dev;
+
 	for (i = 0; i < BOOTLOG_POOL_SIZE; i++) {
 		msg = devm_kzalloc(&qdev->pdev->dev, sizeof(*msg), GFP_KERNEL);
 		if (!msg) {
@@ -233,8 +236,6 @@ static int qaic_bootlog_mhi_probe(struct mhi_device *mhi_dev, const struct mhi_d
 			goto mhi_unprepare;
 	}
 
-	dev_set_drvdata(&mhi_dev->dev, qdev);
-	qdev->bootlog_ch = mhi_dev;
 	return 0;
 
 mhi_unprepare:

drivers/accel/qaic/qaic_drv.c

@@ -454,6 +454,9 @@ static struct qaic_device *create_qdev(struct pci_dev *pdev,
 			return NULL;
 		init_waitqueue_head(&qdev->dbc[i].dbc_release);
 		INIT_LIST_HEAD(&qdev->dbc[i].bo_lists);
+		ret = drmm_mutex_init(drm, &qdev->dbc[i].req_lock);
+		if (ret)
+			return NULL;
 	}
 
 	return qdev;

drivers/gpu/drm/ast/ast_mode.c

@@ -836,22 +836,24 @@ ast_crtc_helper_atomic_flush(struct drm_crtc *crtc,
 static void ast_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
 	struct ast_device *ast = to_ast_device(crtc->dev);
+	u8 vgacr17 = 0x00;
+	u8 vgacrb6 = 0xff;
 
-	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xfc, 0x00);
-	ast_set_index_reg_mask(ast, AST_IO_VGASRI, 0x01, 0xdf, 0x00);
+	vgacr17 |= AST_IO_VGACR17_SYNC_ENABLE;
+	vgacrb6 &= ~(AST_IO_VGACRB6_VSYNC_OFF | AST_IO_VGACRB6_HSYNC_OFF);
+
+	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x17, 0x7f, vgacr17);
+	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xfc, vgacrb6);
 }
 
 static void ast_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
 	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
 	struct ast_device *ast = to_ast_device(crtc->dev);
-	u8 vgacrb6;
+	u8 vgacr17 = 0xff;
 
-	ast_set_index_reg_mask(ast, AST_IO_VGASRI, 0x01, 0xdf, AST_IO_VGASR1_SD);
-
-	vgacrb6 = AST_IO_VGACRB6_VSYNC_OFF |
-		  AST_IO_VGACRB6_HSYNC_OFF;
-	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xfc, vgacrb6);
+	vgacr17 &= ~AST_IO_VGACR17_SYNC_ENABLE;
+	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x17, 0x7f, vgacr17);
 
 	/*
 	 * HW cursors require the underlying primary plane and CRTC to

drivers/gpu/drm/ast/ast_reg.h

@@ -29,6 +29,7 @@
 #define AST_IO_VGAGRI			(0x4E)
 
 #define AST_IO_VGACRI			(0x54)
+#define AST_IO_VGACR17_SYNC_ENABLE	BIT(7) /* called "Hardware reset" in docs */
 #define AST_IO_VGACR80_PASSWORD		(0xa8)
 #define AST_IO_VGACR99_VGAMEM_RSRV_MASK	GENMASK(1, 0)
 #define AST_IO_VGACRA1_VGAIO_DISABLED	BIT(1)

drivers/gpu/drm/bridge/lontium-lt9211.c

@@ -121,8 +121,7 @@ static int lt9211_read_chipid(struct lt9211 *ctx)
 	}
 
 	/* Test for known Chip ID. */
-	if (chipid[0] != REG_CHIPID0_VALUE || chipid[1] != REG_CHIPID1_VALUE ||
-	    chipid[2] != REG_CHIPID2_VALUE) {
+	if (chipid[0] != REG_CHIPID0_VALUE || chipid[1] != REG_CHIPID1_VALUE) {
 		dev_err(ctx->dev, "Unknown Chip ID: 0x%02x 0x%02x 0x%02x\n",
 			chipid[0], chipid[1], chipid[2]);
 		return -EINVAL;

drivers/gpu/drm/drm_draw.c

@@ -127,7 +127,7 @@ EXPORT_SYMBOL(drm_draw_fill16);
 
 void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,
-		     u16 color)
+		     u32 color)
 {
 	unsigned int y, x;
 

drivers/gpu/drm/drm_draw_internal.h

@@ -47,7 +47,7 @@ void drm_draw_fill16(struct iosys_map *dmap, unsigned int dpitch,
 
 void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,
-		     u16 color);
+		     u32 color);
 
 void drm_draw_fill32(struct iosys_map *dmap, unsigned int dpitch,
 		     unsigned int height, unsigned int width,

drivers/gpu/drm/panthor/panthor_fw.c

@@ -1099,6 +1099,7 @@ void panthor_fw_pre_reset(struct panthor_device *ptdev, bool on_hang)
 	}
 
 	panthor_job_irq_suspend(&ptdev->fw->irq);
+	panthor_fw_stop(ptdev);
 }
 
 /**

drivers/gpu/drm/rockchip/rockchip_drm_vop2.c

@@ -1031,7 +1031,7 @@ static int vop2_plane_atomic_check(struct drm_plane *plane,
 		return format;
 
 	if (drm_rect_width(src) >> 16 < 4 || drm_rect_height(src) >> 16 < 4 ||
-	    drm_rect_width(dest) < 4 || drm_rect_width(dest) < 4) {
+	    drm_rect_width(dest) < 4 || drm_rect_height(dest) < 4) {
 		drm_err(vop2->drm, "Invalid size: %dx%d->%dx%d, min size is 4x4\n",
 			drm_rect_width(src) >> 16, drm_rect_height(src) >> 16,
 			drm_rect_width(dest), drm_rect_height(dest));

drivers/gpu/drm/scheduler/sched_main.c

@@ -965,13 +965,14 @@ int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
 	dma_resv_assert_held(resv);
 
 	dma_resv_for_each_fence(&cursor, resv, usage, fence) {
-		/* Make sure to grab an additional ref on the added fence */
-		dma_fence_get(fence);
-		ret = drm_sched_job_add_dependency(job, fence);
-		if (ret) {
-			dma_fence_put(fence);
+		/*
+		 * As drm_sched_job_add_dependency always consumes the fence
+		 * reference (even when it fails), and dma_resv_for_each_fence
+		 * is not obtaining one, we need to grab one before calling.
+		 */
+		ret = drm_sched_job_add_dependency(job, dma_fence_get(fence));
+		if (ret)
 			return ret;
-		}
 	}
 	return 0;
 }

include/drm/drm_gpuvm.h

@@ -1078,7 +1078,7 @@ struct drm_gpuva_ops {
  */
 struct drm_gpuvm_map_req {
 	/**
-	 * @op_map: struct drm_gpuva_op_map
+	 * @map: struct drm_gpuva_op_map
 	 */
 	struct drm_gpuva_op_map map;
 };