Merge tag 'drm-misc-fixes-2025-10-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

Short summary of fixes pull:

panic:
- Fix several issues in size calculations

panthor:
- Fix kernel panic on partial unmap of GPU VA region

rockchip:
- hdmi: Fix HDP setup

Signed-off-by: Simona Vetter <simona.vetter@ffwll.ch>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20251023083449.GA13190@linux-2.fritz.box

3 files changed, 62 insertions, 10 deletions

diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 1d6312fa1429..d4b6ea42db0f 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -174,6 +174,33 @@ static void drm_panic_write_pixel24(void *vaddr, unsigned int offset, u32 color)
 	*p = color & 0xff;
 }
 
+/*
+ * Special case if the pixel crosses page boundaries
+ */
+static void drm_panic_write_pixel24_xpage(void *vaddr, struct page *next_page,
+					  unsigned int offset, u32 color)
+{
+	u8 *vaddr2;
+	u8 *p = vaddr + offset;
+
+	vaddr2 = kmap_local_page_try_from_panic(next_page);
+
+	*p++ = color & 0xff;
+	color >>= 8;
+
+	if (offset == PAGE_SIZE - 1)
+		p = vaddr2;
+
+	*p++ = color & 0xff;
+	color >>= 8;
+
+	if (offset == PAGE_SIZE - 2)
+		p = vaddr2;
+
+	*p = color & 0xff;
+	kunmap_local(vaddr2);
+}
+
 static void drm_panic_write_pixel32(void *vaddr, unsigned int offset, u32 color)
 {
 	u32 *p = vaddr + offset;
@@ -231,7 +258,14 @@ static void drm_panic_blit_page(struct page **pages, unsigned int dpitch,
 					page = new_page;
 					vaddr = kmap_local_page_try_from_panic(pages[page]);
 				}
-				if (vaddr)
+				if (!vaddr)
+					continue;
+
+				// Special case for 24bit, as a pixel might cross page boundaries
+				if (cpp == 3 && offset + 3 > PAGE_SIZE)
+					drm_panic_write_pixel24_xpage(vaddr, pages[page + 1],
+								      offset, fg32);
+				else
 					drm_panic_write_pixel(vaddr, offset, fg32, cpp);
 			}
 		}
@@ -321,7 +355,15 @@ static void drm_panic_fill_page(struct page **pages, unsigned int dpitch,
 				page = new_page;
 				vaddr = kmap_local_page_try_from_panic(pages[page]);
 			}
-			drm_panic_write_pixel(vaddr, offset, color, cpp);
+			if (!vaddr)
+				continue;
+
+			// Special case for 24bit, as a pixel might cross page boundaries
+			if (cpp == 3 && offset + 3 > PAGE_SIZE)
+				drm_panic_write_pixel24_xpage(vaddr, pages[page + 1],
+							      offset, color);
+			else
+				drm_panic_write_pixel(vaddr, offset, color, cpp);
 		}
 	}
 	if (vaddr)
@@ -429,6 +471,9 @@ static void drm_panic_logo_rect(struct drm_rect *rect, const struct font_desc *f
 static void drm_panic_logo_draw(struct drm_scanout_buffer *sb, struct drm_rect *rect,
 				const struct font_desc *font, u32 fg_color)
 {
+	if (rect->x2 > sb->width || rect->y2 > sb->height)
+		return;
+
 	if (logo_mono)
 		drm_panic_blit(sb, rect, logo_mono->data,
 			       DIV_ROUND_UP(drm_rect_width(rect), 8), 1, fg_color);
@@ -477,7 +522,7 @@ static int draw_line_with_wrap(struct drm_scanout_buffer *sb, const struct font_
 			       struct drm_panic_line *line, int yoffset, u32 fg_color)
 {
 	int chars_per_row = sb->width / font->width;
-	struct drm_rect r_txt = DRM_RECT_INIT(0, yoffset, sb->width, sb->height);
+	struct drm_rect r_txt = DRM_RECT_INIT(0, yoffset, sb->width, font->height);
 	struct drm_panic_line line_wrap;
 
 	if (line->len > chars_per_row) {
@@ -520,7 +565,7 @@ static void draw_panic_static_kmsg(struct drm_scanout_buffer *sb)
 	struct drm_panic_line line;
 	int yoffset;
 
-	if (!font)
+	if (!font || font->width > sb->width)
 		return;
 
 	yoffset = sb->height - font->height - (sb->height % font->height) / 2;
@@ -733,7 +778,10 @@ static int _draw_panic_static_qr_code(struct drm_scanout_buffer *sb)
 	pr_debug("QR width %d and scale %d\n", qr_width, scale);
 	r_qr_canvas = DRM_RECT_INIT(0, 0, qr_canvas_width * scale, qr_canvas_width * scale);
 
-	v_margin = (sb->height - drm_rect_height(&r_qr_canvas) - drm_rect_height(&r_msg)) / 5;
+	v_margin = sb->height - drm_rect_height(&r_qr_canvas) - drm_rect_height(&r_msg);
+	if (v_margin < 0)
+		return -ENOSPC;
+	v_margin /= 5;
 
 	drm_rect_translate(&r_qr_canvas, (sb->width - r_qr_canvas.x2) / 2, 2 * v_margin);
 	r_qr = DRM_RECT_INIT(r_qr_canvas.x1 + QR_MARGIN * scale, r_qr_canvas.y1 + QR_MARGIN * scale,
@@ -746,7 +794,7 @@ static int _draw_panic_static_qr_code(struct drm_scanout_buffer *sb)
 	/* Fill with the background color, and draw text on top */
 	drm_panic_fill(sb, &r_screen, bg_color);
 
-	if (!drm_rect_overlap(&r_logo, &r_msg) && !drm_rect_overlap(&r_logo, &r_qr))
+	if (!drm_rect_overlap(&r_logo, &r_msg) && !drm_rect_overlap(&r_logo, &r_qr_canvas))
 		drm_panic_logo_draw(sb, &r_logo, font, fg_color);
 
 	draw_txt_rectangle(sb, font, panic_msg, panic_msg_lines, true, &r_msg, fg_color);
diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
index 6dec4354e378..7870e7dbaa5d 100644
--- a/drivers/gpu/drm/panthor/panthor_mmu.c
+++ b/drivers/gpu/drm/panthor/panthor_mmu.c
@@ -1175,10 +1175,14 @@ panthor_vm_op_ctx_prealloc_vmas(struct panthor_vm_op_ctx *op_ctx)
 		break;
 
 	case DRM_PANTHOR_VM_BIND_OP_TYPE_UNMAP:
-		/* Partial unmaps might trigger a remap with either a prev or a next VA,
-		 * but not both.
+		/* Two VMAs can be needed for an unmap, as an unmap can happen
+		 * in the middle of a drm_gpuva, requiring a remap with both
+		 * prev & next VA. Or an unmap can span more than one drm_gpuva
+		 * where the first and last ones are covered partially, requring
+		 * a remap for the first with a prev VA and remap for the last
+		 * with a next VA.
 		 */
-		vma_count = 1;
+		vma_count = 2;
 		break;
 
 	default:
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 7b613997bb50..727cdf768161 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -361,7 +361,7 @@ static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
 
 	regmap_write(hdmi->regmap, RK3228_GRF_SOC_CON2,
 		     FIELD_PREP_WM16(RK3228_HDMI_SDAIN_MSK, 1) |
-		     FIELD_PREP_WM16(RK3328_HDMI_SCLIN_MSK, 1));
+		     FIELD_PREP_WM16(RK3228_HDMI_SCLIN_MSK, 1));
 }
 
 static enum drm_connector_status