Merge tag 'drm-misc-fixes-2024-09-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

A zpos normalization fix for komeda, a register bitmask fix for nouveau,
a memory leak fix for imagination, three fixes for the recent bridge
HDMI work, a potential DoS fix and a cache coherency for panthor, a
change of panel compatible and a deferred-io fix when used with
non-highmem memory.

Signed-off-by: Dave Airlie <[email protected]>

From: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/20240905-original-radical-guan-e7a2ae@houat

Author: airlied

Documentation/devicetree/bindings/display/panel/wl-355608-a8.yaml renamed to Documentation/devicetree/bindings/display/panel/anbernic,rg35xx-plus-panel.yaml

@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/display/panel/wl-355608-a8.yaml#
+$id: http://devicetree.org/schemas/display/panel/anbernic,rg35xx-plus-panel.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: WL-355608-A8 3.5" (640x480 pixels) 24-bit IPS LCD panel
+title: Anbernic RG35XX series (WL-355608-A8) 3.5" 640x480 24-bit IPS LCD panel
 
 maintainers:
   - Ryan Walklin <[email protected]>
@@ -15,7 +15,14 @@ allOf:
 
 properties:
   compatible:
-    const: wl-355608-a8
+    oneOf:
+      - const: anbernic,rg35xx-plus-panel
+      - items:
+          - enum:
+              - anbernic,rg35xx-2024-panel
+              - anbernic,rg35xx-h-panel
+              - anbernic,rg35xx-sp-panel
+          - const: anbernic,rg35xx-plus-panel
 
   reg:
     maxItems: 1
@@ -40,7 +47,7 @@ examples:
         #size-cells = <0>;
 
         panel@0 {
-            compatible = "wl-355608-a8";
+            compatible = "anbernic,rg35xx-plus-panel";
             reg = <0>;
 
             spi-3wire;

MAINTAINERS

@@ -7457,8 +7457,8 @@ S:	Maintained
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
 F:	Documentation/devicetree/bindings/display/bridge/
 F:	drivers/gpu/drm/bridge/
+F:	drivers/gpu/drm/display/drm_bridge_connector.c
 F:	drivers/gpu/drm/drm_bridge.c
-F:	drivers/gpu/drm/drm_bridge_connector.c
 F:	include/drm/drm_bridge.h
 F:	include/drm/drm_bridge_connector.h
 

drivers/gpu/drm/Makefile

@@ -128,7 +128,6 @@ obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o
 drm_kms_helper-y := \
 	drm_atomic_helper.o \
 	drm_atomic_state_helper.o \
-	drm_bridge_connector.o \
 	drm_crtc_helper.o \
 	drm_damage_helper.o \
 	drm_encoder_slave.o \

drivers/gpu/drm/arm/display/komeda/komeda_kms.c

@@ -160,6 +160,7 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
 	struct drm_plane *plane;
 	struct list_head zorder_list;
 	int order = 0, err;
+	u32 slave_zpos = 0;
 
 	DRM_DEBUG_ATOMIC("[CRTC:%d:%s] calculating normalized zpos values\n",
 			 crtc->base.id, crtc->name);
@@ -199,10 +200,13 @@ static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
 				 plane_st->zpos, plane_st->normalized_zpos);
 
 		/* calculate max slave zorder */
-		if (has_bit(drm_plane_index(plane), kcrtc->slave_planes))
+		if (has_bit(drm_plane_index(plane), kcrtc->slave_planes)) {
+			slave_zpos = plane_st->normalized_zpos;
+			if (to_kplane_st(plane_st)->layer_split)
+				slave_zpos++;
 			kcrtc_st->max_slave_zorder =
-				max(plane_st->normalized_zpos,
-				    kcrtc_st->max_slave_zorder);
+				max(slave_zpos, kcrtc_st->max_slave_zorder);
+		}
 	}
 
 	crtc_st->zpos_changed = true;

drivers/gpu/drm/bridge/Kconfig

@@ -390,6 +390,7 @@ config DRM_TI_SN65DSI86
 	depends on OF
 	select DRM_DISPLAY_DP_HELPER
 	select DRM_DISPLAY_HELPER
+	select DRM_BRIDGE_CONNECTOR
 	select DRM_KMS_HELPER
 	select REGMAP_I2C
 	select DRM_PANEL

drivers/gpu/drm/display/Kconfig

@@ -1,19 +1,26 @@
 # SPDX-License-Identifier: MIT
 
+config DRM_DISPLAY_DP_AUX_BUS
+	tristate
+	depends on DRM
+	depends on OF || COMPILE_TEST
+
 config DRM_DISPLAY_HELPER
 	tristate
 	depends on DRM
 	help
 	  DRM helpers for display adapters.
 
-config DRM_DISPLAY_DP_AUX_BUS
-	tristate
-	depends on DRM
-	depends on OF || COMPILE_TEST
+if DRM_DISPLAY_HELPER
+
+config DRM_BRIDGE_CONNECTOR
+	bool
+	select DRM_DISPLAY_HDMI_STATE_HELPER
+	help
+	  DRM connector implementation terminating DRM bridge chains.
 
 config DRM_DISPLAY_DP_AUX_CEC
 	bool "Enable DisplayPort CEC-Tunneling-over-AUX HDMI support"
-	depends on DRM && DRM_DISPLAY_HELPER
 	select DRM_DISPLAY_DP_HELPER
 	select CEC_CORE
 	help
@@ -25,7 +32,6 @@ config DRM_DISPLAY_DP_AUX_CEC
 
 config DRM_DISPLAY_DP_AUX_CHARDEV
 	bool "DRM DP AUX Interface"
-	depends on DRM && DRM_DISPLAY_HELPER
 	select DRM_DISPLAY_DP_HELPER
 	help
 	  Choose this option to enable a /dev/drm_dp_auxN node that allows to
@@ -34,7 +40,6 @@ config DRM_DISPLAY_DP_AUX_CHARDEV
 
 config DRM_DISPLAY_DP_HELPER
 	bool
-	depends on DRM_DISPLAY_HELPER
 	help
 	  DRM display helpers for DisplayPort.
 
@@ -61,19 +66,18 @@ config DRM_DISPLAY_DP_TUNNEL_STATE_DEBUG
 
 config DRM_DISPLAY_HDCP_HELPER
 	bool
-	depends on DRM_DISPLAY_HELPER
 	help
 	  DRM display helpers for HDCP.
 
 config DRM_DISPLAY_HDMI_HELPER
 	bool
-	depends on DRM_DISPLAY_HELPER
 	help
 	  DRM display helpers for HDMI.
 
 config DRM_DISPLAY_HDMI_STATE_HELPER
 	bool
-	depends on DRM_DISPLAY_HELPER
 	select DRM_DISPLAY_HDMI_HELPER
 	help
 	  DRM KMS state helpers for HDMI.
+
+endif # DRM_DISPLAY_HELPER

drivers/gpu/drm/display/Makefile

@@ -3,6 +3,8 @@
 obj-$(CONFIG_DRM_DISPLAY_DP_AUX_BUS) += drm_dp_aux_bus.o
 
 drm_display_helper-y := drm_display_helper_mod.o
+drm_display_helper-$(CONFIG_DRM_BRIDGE_CONNECTOR) += \
+	drm_bridge_connector.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += \
 	drm_dp_dual_mode_helper.o \
 	drm_dp_helper.o \

drivers/gpu/drm/drm_bridge_connector.c renamed to drivers/gpu/drm/display/drm_bridge_connector.c

@@ -216,8 +216,19 @@ static void drm_bridge_connector_debugfs_init(struct drm_connector *connector,
 	}
 }
 
+static void drm_bridge_connector_reset(struct drm_connector *connector)
+{
+	struct drm_bridge_connector *bridge_connector =
+		to_drm_bridge_connector(connector);
+
+	drm_atomic_helper_connector_reset(connector);
+	if (bridge_connector->bridge_hdmi)
+		__drm_atomic_helper_connector_hdmi_reset(connector,
+							 connector->state);
+}
+
 static const struct drm_connector_funcs drm_bridge_connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
+	.reset = drm_bridge_connector_reset,
 	.detect = drm_bridge_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,

drivers/gpu/drm/drm_fbdev_dma.c

@@ -36,20 +36,11 @@ static int drm_fbdev_dma_fb_release(struct fb_info *info, int user)
 	return 0;
 }
 
-FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(drm_fbdev_dma,
-				   drm_fb_helper_damage_range,
-				   drm_fb_helper_damage_area);
-
 static int drm_fbdev_dma_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
 	struct drm_fb_helper *fb_helper = info->par;
-	struct drm_framebuffer *fb = fb_helper->fb;
-	struct drm_gem_dma_object *dma = drm_fb_dma_get_gem_obj(fb, 0);
 
-	if (!dma->map_noncoherent)
-		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-
-	return fb_deferred_io_mmap(info, vma);
+	return drm_gem_prime_mmap(fb_helper->buffer->gem, vma);
 }
 
 static void drm_fbdev_dma_fb_destroy(struct fb_info *info)
@@ -70,13 +61,40 @@ static void drm_fbdev_dma_fb_destroy(struct fb_info *info)
 }
 
 static const struct fb_ops drm_fbdev_dma_fb_ops = {
+	.owner = THIS_MODULE,
+	.fb_open = drm_fbdev_dma_fb_open,
+	.fb_release = drm_fbdev_dma_fb_release,
+	__FB_DEFAULT_DMAMEM_OPS_RDWR,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	__FB_DEFAULT_DMAMEM_OPS_DRAW,
+	.fb_mmap = drm_fbdev_dma_fb_mmap,
+	.fb_destroy = drm_fbdev_dma_fb_destroy,
+};
+
+FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS(drm_fbdev_dma,
+				   drm_fb_helper_damage_range,
+				   drm_fb_helper_damage_area);
+
+static int drm_fbdev_dma_deferred_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
+	struct drm_gem_dma_object *dma = drm_fb_dma_get_gem_obj(fb, 0);
+
+	if (!dma->map_noncoherent)
+		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+
+	return fb_deferred_io_mmap(info, vma);
+}
+
+static const struct fb_ops drm_fbdev_dma_deferred_fb_ops = {
 	.owner = THIS_MODULE,
 	.fb_open = drm_fbdev_dma_fb_open,
 	.fb_release = drm_fbdev_dma_fb_release,
 	__FB_DEFAULT_DEFERRED_OPS_RDWR(drm_fbdev_dma),
 	DRM_FB_HELPER_DEFAULT_OPS,
 	__FB_DEFAULT_DEFERRED_OPS_DRAW(drm_fbdev_dma),
-	.fb_mmap = drm_fbdev_dma_fb_mmap,
+	.fb_mmap = drm_fbdev_dma_deferred_fb_mmap,
 	.fb_destroy = drm_fbdev_dma_fb_destroy,
 };
 
@@ -89,6 +107,7 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
 {
 	struct drm_client_dev *client = &fb_helper->client;
 	struct drm_device *dev = fb_helper->dev;
+	bool use_deferred_io = false;
 	struct drm_client_buffer *buffer;
 	struct drm_gem_dma_object *dma_obj;
 	struct drm_framebuffer *fb;
@@ -111,6 +130,15 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
 
 	fb = buffer->fb;
 
+	/*
+	 * Deferred I/O requires struct page for framebuffer memory,
+	 * which is not guaranteed for all DMA ranges. We thus only
+	 * install deferred I/O if we have a framebuffer that requires
+	 * it.
+	 */
+	if (fb->funcs->dirty)
+		use_deferred_io = true;
+
 	ret = drm_client_buffer_vmap(buffer, &map);
 	if (ret) {
 		goto err_drm_client_buffer_delete;
@@ -130,7 +158,10 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
 
 	drm_fb_helper_fill_info(info, fb_helper, sizes);
 
-	info->fbops = &drm_fbdev_dma_fb_ops;
+	if (use_deferred_io)
+		info->fbops = &drm_fbdev_dma_deferred_fb_ops;
+	else
+		info->fbops = &drm_fbdev_dma_fb_ops;
 
 	/* screen */
 	info->flags |= FBINFO_VIRTFB; /* system memory */
@@ -144,14 +175,28 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
 	}
 	info->fix.smem_len = info->screen_size;
 
-	/* deferred I/O */
-	fb_helper->fbdefio.delay = HZ / 20;
-	fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io;
+	/*
+	 * Only set up deferred I/O if the screen buffer supports
+	 * it. If this disagrees with the previous test for ->dirty,
+	 * mmap on the /dev/fb file might not work correctly.
+	 */
+	if (!is_vmalloc_addr(info->screen_buffer) && info->fix.smem_start) {
+		unsigned long pfn = info->fix.smem_start >> PAGE_SHIFT;
 
-	info->fbdefio = &fb_helper->fbdefio;
-	ret = fb_deferred_io_init(info);
-	if (ret)
-		goto err_drm_fb_helper_release_info;
+		if (drm_WARN_ON(dev, !pfn_to_page(pfn)))
+			use_deferred_io = false;
+	}
+
+	/* deferred I/O */
+	if (use_deferred_io) {
+		fb_helper->fbdefio.delay = HZ / 20;
+		fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io;
+
+		info->fbdefio = &fb_helper->fbdefio;
+		ret = fb_deferred_io_init(info);
+		if (ret)
+			goto err_drm_fb_helper_release_info;
+	}
 
 	return 0;
 

drivers/gpu/drm/imagination/pvr_vm.c

@@ -114,6 +114,8 @@ struct pvr_vm_gpuva {
 	struct drm_gpuva base;
 };
 
+#define to_pvr_vm_gpuva(va) container_of_const(va, struct pvr_vm_gpuva, base)
+
 enum pvr_vm_bind_type {
 	PVR_VM_BIND_TYPE_MAP,
 	PVR_VM_BIND_TYPE_UNMAP,
@@ -386,6 +388,7 @@ pvr_vm_gpuva_unmap(struct drm_gpuva_op *op, void *op_ctx)
 
 	drm_gpuva_unmap(&op->unmap);
 	drm_gpuva_unlink(op->unmap.va);
+	kfree(to_pvr_vm_gpuva(op->unmap.va));
 
 	return 0;
 }
@@ -433,6 +436,7 @@ pvr_vm_gpuva_remap(struct drm_gpuva_op *op, void *op_ctx)
 	}
 
 	drm_gpuva_unlink(op->remap.unmap->va);
+	kfree(to_pvr_vm_gpuva(op->remap.unmap->va));
 
 	return 0;
 }