Merge tag 'drm-misc-next-2026-01-08' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for 6.20:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
  - draw: Add API to check if a format conversion can be done
  - panic: Rename draw_panic_static_* to draw_panic_screen_*, Add kunit
    tests
  - shmem: Improve tests

Driver Changes:
  - ast: Big endian fixes
  - etnaviv: Add PPU flop reset support
  - panfrost: Add GPU_PM_RT support for RZ/G3E SoC
  - panthor: multiple fixes around VM termination, huge page support
  - pl111: Fix build regression
  - v3d: Fix DMA segment size

  - bridge:
    - Add connector argument to .hpd_notify
    - Plenty of patches to convert existing drivers to refcounting
    - Convert Rockchip's inno hdmi support to a proper bridge
    - lontium-lt9611uxc: Switch to HDMI audio helpers

  - panel:
    - New panel: BOE NV140WUM-T08

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

From: Maxime Ripard <mripard@redhat.com>
Link: https://patch.msgid.link/20260108-literate-nyala-of-courtesy-de501a@houat

Author: airlied

Documentation/gpu/todo.rst

@@ -506,6 +506,22 @@ Contact: Maxime Ripard <mripard@kernel.org>,
 
 Level: Intermediate
 
+Convert users of of_drm_find_bridge() to of_drm_find_and_get_bridge()
+---------------------------------------------------------------------
+
+Taking a struct drm_bridge pointer requires getting a reference and putting
+it after disposing of the pointer. Most functions returning a struct
+drm_bridge pointer already call drm_bridge_get() to increment the refcount
+and their users have been updated to call drm_bridge_put() when
+appropriate. of_drm_find_bridge() does not get a reference and it has been
+deprecated in favor of of_drm_find_and_get_bridge() which does, but some
+users still need to be converted.
+
+Contact: Maxime Ripard <mripard@kernel.org>,
+         Luca Ceresoli <luca.ceresoli@bootlin.com>
+
+Level: Intermediate
+
 Core refactorings
 =================
 

MAINTAINERS

@@ -8749,6 +8749,7 @@ T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
 F:	drivers/gpu/drm/drm_draw.c
 F:	drivers/gpu/drm/drm_draw_internal.h
 F:	drivers/gpu/drm/drm_panic*.c
+F:	drivers/gpu/drm/tests/drm_panic_test.c
 F:	include/drm/drm_panic*
 
 DRM PANIC QR CODE
@@ -12457,6 +12458,14 @@ M:	Samuel Holland <samuel@sholland.org>
 S:	Maintained
 F:	drivers/power/supply/ip5xxx_power.c
 
+INNOSILICON HDMI BRIDGE DRIVER
+M:	Andy Yan <andy.yan@rock-chips.com>
+L:	dri-devel@lists.freedesktop.org
+S:	Maintained
+T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
+F:	drivers/gpu/drm/bridge/inno-hdmi.c
+F:	include/drm/bridge/inno_hdmi.h
+
 INOTIFY
 M:	Jan Kara <jack@suse.cz>
 R:	Amir Goldstein <amir73il@gmail.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c

@@ -23,6 +23,9 @@
  * Authors: AMD
  *
  */
+
+#include <drm/drm_colorop.h>
+
 #include "amdgpu.h"
 #include "amdgpu_mode.h"
 #include "amdgpu_dm.h"

drivers/gpu/drm/ast/ast_cursor.c

@@ -93,12 +93,17 @@ static void ast_set_cursor_image(struct ast_device *ast, const u8 *src,
 				 unsigned int width, unsigned int height)
 {
 	u8 __iomem *dst = ast_plane_vaddr(&ast->cursor_plane.base);
-	u32 csum;
-
-	csum = ast_cursor_calculate_checksum(src, width, height);
+	u32 csum = ast_cursor_calculate_checksum(src, width, height);
 
 	/* write pixel data */
+#if defined(__BIG_ENDIAN)
+	unsigned int i;
+
+	for (i = 0; i < AST_HWC_SIZE; i += 2)
+		writew(swab16(*(const __u16 *)&src[i]), &dst[i]);
+#else
 	memcpy_toio(dst, src, AST_HWC_SIZE);
+#endif
 
 	/* write checksum + signature */
 	dst += AST_HWC_SIZE;

drivers/gpu/drm/ast/ast_mode.c

@@ -526,12 +526,18 @@ static int ast_primary_plane_helper_atomic_check(struct drm_plane *plane,
 
 static void ast_handle_damage(struct ast_plane *ast_plane, struct iosys_map *src,
 			      struct drm_framebuffer *fb,
-			      const struct drm_rect *clip)
+			      const struct drm_rect *clip,
+			      struct drm_format_conv_state *fmtcnv_state)
 {
 	struct iosys_map dst = IOSYS_MAP_INIT_VADDR_IOMEM(ast_plane_vaddr(ast_plane));
 
 	iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, clip));
+
+#if defined(__BIG_ENDIAN)
+	drm_fb_swab(&dst, fb->pitches, src, fb, clip, !src[0].is_iomem, fmtcnv_state);
+#else
 	drm_fb_memcpy(&dst, fb->pitches, src, fb, clip);
+#endif
 }
 
 static void ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
@@ -561,7 +567,8 @@ static void ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
 	if (drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE) == 0) {
 		drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
 		drm_atomic_for_each_plane_damage(&iter, &damage) {
-			ast_handle_damage(ast_plane, shadow_plane_state->data, fb, &damage);
+			ast_handle_damage(ast_plane, shadow_plane_state->data, fb, &damage,
+					  &shadow_plane_state->fmtcnv_state);
 		}
 
 		drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);

drivers/gpu/drm/bridge/Kconfig

@@ -100,6 +100,13 @@ config DRM_I2C_NXP_TDA998X
 	help
 	  Support for NXP Semiconductors TDA998X HDMI encoders.
 
+config DRM_INNO_HDMI
+	tristate
+	select DRM_BRIDGE_CONNECTOR
+	select DRM_DISPLAY_HDMI_HELPER
+	select DRM_DISPLAY_HELPER
+	select DRM_KMS_HELPER
+
 config DRM_ITE_IT6263
 	tristate "ITE IT6263 LVDS/HDMI bridge"
 	depends on OF

drivers/gpu/drm/bridge/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_DRM_FSL_LDB) += fsl-ldb.o
 tda998x-y := tda998x_drv.o
 obj-$(CONFIG_DRM_I2C_NXP_TDA998X) += tda998x.o
 
+obj-$(CONFIG_DRM_INNO_HDMI) += inno-hdmi.o
 obj-$(CONFIG_DRM_ITE_IT6263) += ite-it6263.o
 obj-$(CONFIG_DRM_ITE_IT6505) += ite-it6505.o
 obj-$(CONFIG_DRM_LONTIUM_LT8912B) += lontium-lt8912b.o

drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c

@@ -60,7 +60,6 @@ enum imx8qxp_pc_pix_data_format {
 
 struct imx8qxp_pc_channel {
 	struct drm_bridge bridge;
-	struct drm_bridge *next_bridge;
 	struct imx8qxp_pc *pc;
 	unsigned int stream_id;
 };
@@ -120,7 +119,7 @@ static int imx8qxp_pc_bridge_attach(struct drm_bridge *bridge,
 	}
 
 	return drm_bridge_attach(encoder,
-				 ch->next_bridge, bridge,
+				 ch->bridge.next_bridge, bridge,
 				 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 }
 
@@ -326,8 +325,8 @@ static int imx8qxp_pc_bridge_probe(struct platform_device *pdev)
 			goto free_child;
 		}
 
-		ch->next_bridge = of_drm_find_bridge(remote);
-		if (!ch->next_bridge) {
+		ch->bridge.next_bridge = of_drm_find_and_get_bridge(remote);
+		if (!ch->bridge.next_bridge) {
 			of_node_put(remote);
 			ret = -EPROBE_DEFER;
 			DRM_DEV_DEBUG_DRIVER(dev,
@@ -349,7 +348,7 @@ static int imx8qxp_pc_bridge_probe(struct platform_device *pdev)
 free_child:
 	of_node_put(child);
 
-	if (i == 1 && pc->ch[0]->next_bridge)
+	if (i == 1 && pc->ch[0]->bridge.next_bridge)
 		drm_bridge_remove(&pc->ch[0]->bridge);
 
 	pm_runtime_disable(dev);

drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c

@@ -374,13 +374,8 @@ static int imx8qxp_pixel_link_bridge_probe(struct platform_device *pdev)
 		return ret;
 
 	pl->next_bridge = imx8qxp_pixel_link_find_next_bridge(pl);
-	if (IS_ERR(pl->next_bridge)) {
-		ret = PTR_ERR(pl->next_bridge);
-		if (ret != -EPROBE_DEFER)
-			DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
-				      ret);
-		return ret;
-	}
+	if (IS_ERR(pl->next_bridge))
+		return PTR_ERR(pl->next_bridge);
 
 	platform_set_drvdata(pdev, pl);
 

drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c

@@ -35,7 +35,6 @@
 struct imx8qxp_pxl2dpi {
 	struct regmap *regmap;
 	struct drm_bridge bridge;
-	struct drm_bridge *next_bridge;
 	struct drm_bridge *companion;
 	struct device *dev;
 	struct imx_sc_ipc *ipc_handle;
@@ -60,10 +59,17 @@ static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge,
 	}
 
 	return drm_bridge_attach(encoder,
-				 p2d->next_bridge, bridge,
+				 p2d->bridge.next_bridge, bridge,
 				 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 }
 
+static void imx8qxp_pxl2dpi_bridge_destroy(struct drm_bridge *bridge)
+{
+	struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
+
+	drm_bridge_put(p2d->companion);
+}
+
 static int
 imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge,
 				    struct drm_bridge_state *bridge_state,
@@ -206,6 +212,7 @@ static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = {
 	.atomic_destroy_state	= drm_atomic_helper_bridge_destroy_state,
 	.atomic_reset		= drm_atomic_helper_bridge_reset,
 	.attach			= imx8qxp_pxl2dpi_bridge_attach,
+	.destroy		= imx8qxp_pxl2dpi_bridge_destroy,
 	.atomic_check		= imx8qxp_pxl2dpi_bridge_atomic_check,
 	.mode_set		= imx8qxp_pxl2dpi_bridge_mode_set,
 	.atomic_disable		= imx8qxp_pxl2dpi_bridge_atomic_disable,
@@ -255,40 +262,27 @@ imx8qxp_pxl2dpi_get_available_ep_from_port(struct imx8qxp_pxl2dpi *p2d,
 	return ep;
 }
 
-static struct drm_bridge *
-imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d)
+static int imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d)
 {
-	struct device_node *ep, *remote;
-	struct drm_bridge *next_bridge;
-	int ret;
-
-	ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1);
-	if (IS_ERR(ep)) {
-		ret = PTR_ERR(ep);
-		return ERR_PTR(ret);
-	}
+	struct device_node *ep __free(device_node) =
+		imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1);
+	if (IS_ERR(ep))
+		return PTR_ERR(ep);
 
-	remote = of_graph_get_remote_port_parent(ep);
+	struct device_node *remote __free(device_node) = of_graph_get_remote_port_parent(ep);
 	if (!remote || !of_device_is_available(remote)) {
 		DRM_DEV_ERROR(p2d->dev, "no available remote\n");
-		next_bridge = ERR_PTR(-ENODEV);
-		goto out;
+		return -ENODEV;
 	} else if (!of_device_is_available(remote->parent)) {
 		DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n");
-		next_bridge = ERR_PTR(-ENODEV);
-		goto out;
+		return -ENODEV;
 	}
 
-	next_bridge = of_drm_find_bridge(remote);
-	if (!next_bridge) {
-		next_bridge = ERR_PTR(-EPROBE_DEFER);
-		goto out;
-	}
-out:
-	of_node_put(remote);
-	of_node_put(ep);
+	p2d->bridge.next_bridge = of_drm_find_and_get_bridge(remote);
+	if (!p2d->bridge.next_bridge)
+		return -EPROBE_DEFER;
 
-	return next_bridge;
+	return 0;
 }
 
 static int imx8qxp_pxl2dpi_set_pixel_link_sel(struct imx8qxp_pxl2dpi *p2d)
@@ -347,7 +341,7 @@ static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d)
 		goto out;
 	}
 
-	p2d->companion = of_drm_find_bridge(companion);
+	p2d->companion = of_drm_find_and_get_bridge(companion);
 	if (!p2d->companion) {
 		ret = -EPROBE_DEFER;
 		DRM_DEV_DEBUG_DRIVER(p2d->dev,
@@ -364,8 +358,8 @@ static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d)
 	 * the next bridges are connected to.  If they are marked as expecting
 	 * even pixels and odd pixels than we need to use the companion PXL2DPI.
 	 */
-	port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1);
-	port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1);
+	port1 = of_graph_get_port_by_id(p2d->bridge.next_bridge->of_node, 1);
+	port2 = of_graph_get_port_by_id(companion_p2d->bridge.next_bridge->of_node, 1);
 	dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
 	of_node_put(port1);
 	of_node_put(port2);
@@ -421,14 +415,9 @@ static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d);
-	if (IS_ERR(p2d->next_bridge)) {
-		ret = PTR_ERR(p2d->next_bridge);
-		if (ret != -EPROBE_DEFER)
-			DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
-				      ret);
+	ret = imx8qxp_pxl2dpi_find_next_bridge(p2d);
+	if (ret)
 		return ret;
-	}
 
 	ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d);
 	if (ret)