Merge tag 'drm-misc-fixes-2022-01-14' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

Two DT bindings fixes for meson, a device refcounting fix for sun4i, a
probe fix for vga16fb, a locking fix for the CMA dma-buf heap and a
compilation fix for ttm.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[danvet: I made sure I have exactly the same conflict resolution as
Linus in 8d0749b4f83b ("Merge tag 'drm-next-2022-01-07' of
git://anongit.freedesktop.org/drm/drm") to avoid further conflict fun.
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220114125454.zs46ny52lrxk3ljz@houat

9 files changed, 76 insertions, 27 deletions

diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c
index 0c05b79870f9..83f02bd51dda 100644
--- a/drivers/dma-buf/heaps/cma_heap.c
+++ b/drivers/dma-buf/heaps/cma_heap.c
@@ -124,10 +124,11 @@ static int cma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf,
 	struct cma_heap_buffer *buffer = dmabuf->priv;
 	struct dma_heap_attachment *a;
 
+	mutex_lock(&buffer->lock);
+
 	if (buffer->vmap_cnt)
 		invalidate_kernel_vmap_range(buffer->vaddr, buffer->len);
 
-	mutex_lock(&buffer->lock);
 	list_for_each_entry(a, &buffer->attachments, list) {
 		if (!a->mapped)
 			continue;
@@ -144,10 +145,11 @@ static int cma_heap_dma_buf_end_cpu_access(struct dma_buf *dmabuf,
 	struct cma_heap_buffer *buffer = dmabuf->priv;
 	struct dma_heap_attachment *a;
 
+	mutex_lock(&buffer->lock);
+
 	if (buffer->vmap_cnt)
 		flush_kernel_vmap_range(buffer->vaddr, buffer->len);
 
-	mutex_lock(&buffer->lock);
 	list_for_each_entry(a, &buffer->attachments, list) {
 		if (!a->mapped)
 			continue;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 4896c876ffec..579adfafe4d0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -381,7 +381,7 @@ amdgpu_dma_buf_move_notify(struct dma_buf_attachment *attach)
 	struct amdgpu_vm_bo_base *bo_base;
 	int r;
 
-	if (bo->tbo.resource->mem_type == TTM_PL_SYSTEM)
+	if (!bo->tbo.resource || bo->tbo.resource->mem_type == TTM_PL_SYSTEM)
 		return;
 
 	r = ttm_bo_validate(&bo->tbo, &placement, &ctx);
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 44c2aafcb7c2..956c8982192b 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1118,7 +1118,10 @@ static void ast_crtc_reset(struct drm_crtc *crtc)
 	if (crtc->state)
 		crtc->funcs->atomic_destroy_state(crtc, crtc->state);
 
-	__drm_atomic_helper_crtc_reset(crtc, &ast_state->base);
+	if (ast_state)
+		__drm_atomic_helper_crtc_reset(crtc, &ast_state->base);
+	else
+		__drm_atomic_helper_crtc_reset(crtc, NULL);
 }
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 9727a59d35fd..ed43b987d306 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1743,7 +1743,13 @@ void drm_fb_helper_fill_info(struct fb_info *info,
 			       sizes->fb_width, sizes->fb_height);
 
 	info->par = fb_helper;
-	snprintf(info->fix.id, sizeof(info->fix.id), "%s",
+	/*
+	 * The DRM drivers fbdev emulation device name can be confusing if the
+	 * driver name also has a "drm" suffix on it. Leading to names such as
+	 * "simpledrmdrmfb" in /proc/fb. Unfortunately, it's an uAPI and can't
+	 * be changed due user-space tools (e.g: pm-utils) matching against it.
+	 */
+	snprintf(info->fix.id, sizeof(info->fix.id), "%sdrmfb",
 		 fb_helper->dev->driver->name);
 
 }
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index 26f9299df881..a3a04e0d76ec 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -344,38 +344,48 @@ nouveau_fence_sync(struct nouveau_bo *nvbo, struct nouveau_channel *chan,
 {
 	struct nouveau_fence_chan *fctx = chan->fence;
 	struct dma_resv *resv = nvbo->bo.base.resv;
-	struct dma_resv_iter cursor;
-	struct dma_fence *fence;
-	struct nouveau_fence *f;
-	int ret;
+	int i, ret;
 
 	if (!exclusive) {
 		ret = dma_resv_reserve_shared(resv, 1);
-
 		if (ret)
 			return ret;
 	}
 
-	dma_resv_for_each_fence(&cursor, resv, exclusive, fence) {
-		struct nouveau_channel *prev = NULL;
-		bool must_wait = true;
-
-		f = nouveau_local_fence(fence, chan->drm);
-		if (f) {
-			rcu_read_lock();
-			prev = rcu_dereference(f->channel);
-			if (prev && (prev == chan ||
-				     fctx->sync(f, prev, chan) == 0))
-				must_wait = false;
-			rcu_read_unlock();
-		}
+	/* Waiting for the exclusive fence first causes performance regressions
+	 * under some circumstances. So manually wait for the shared ones first.
+	 */
+	for (i = 0; i < 2; ++i) {
+		struct dma_resv_iter cursor;
+		struct dma_fence *fence;
+
+		dma_resv_for_each_fence(&cursor, resv, exclusive, fence) {
+			struct nouveau_fence *f;
+
+			if (i == 0 && dma_resv_iter_is_exclusive(&cursor))
+				continue;
+
+			f = nouveau_local_fence(fence, chan->drm);
+			if (f) {
+				struct nouveau_channel *prev;
+				bool must_wait = true;
+
+				rcu_read_lock();
+				prev = rcu_dereference(f->channel);
+				if (prev && (prev == chan ||
+					     fctx->sync(f, prev, chan) == 0))
+					must_wait = false;
+				rcu_read_unlock();
+				if (!must_wait)
+					continue;
+			}
 
-		if (must_wait) {
 			ret = dma_fence_wait(fence, intr);
 			if (ret)
 				return ret;
 		}
 	}
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
index b64d93da651d..5e2b0175df36 100644
--- a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
+++ b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
@@ -658,8 +658,10 @@ int sun8i_hdmi_phy_get(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
 		return -EPROBE_DEFER;
 
 	phy = platform_get_drvdata(pdev);
-	if (!phy)
+	if (!phy) {
+		put_device(&pdev->dev);
 		return -EPROBE_DEFER;
+	}
 
 	hdmi->phy = phy;
 
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index b977f5c94562..04146da2d1d8 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -459,7 +459,7 @@ static struct drm_display_mode simpledrm_mode(unsigned int width,
 {
 	struct drm_display_mode mode = { SIMPLEDRM_MODE(width, height) };
 
-	mode.clock = 60 /* Hz */ * mode.hdisplay * mode.vdisplay;
+	mode.clock = mode.hdisplay * mode.vdisplay * 60 / 1000 /* kHz */;
 	drm_mode_set_name(&mode);
 
 	return mode;
diff --git a/drivers/gpu/drm/ttm/ttm_module.c b/drivers/gpu/drm/ttm/ttm_module.c
index 0037eefe3239..a3ad7c9736ec 100644
--- a/drivers/gpu/drm/ttm/ttm_module.c
+++ b/drivers/gpu/drm/ttm/ttm_module.c
@@ -68,9 +68,11 @@ pgprot_t ttm_prot_from_caching(enum ttm_caching caching, pgprot_t tmp)
 #if defined(__i386__) || defined(__x86_64__)
 	if (caching == ttm_write_combined)
 		tmp = pgprot_writecombine(tmp);
+#ifndef CONFIG_UML
 	else if (boot_cpu_data.x86 > 3)
 		tmp = pgprot_noncached(tmp);
-#endif
+#endif /* CONFIG_UML */
+#endif /* __i386__ || __x86_64__ */
 #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \
 	defined(__powerpc__) || defined(__mips__)
 	if (caching == ttm_write_combined)
diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c
index e2757ff1c23d..96e312a3eac7 100644
--- a/drivers/video/fbdev/vga16fb.c
+++ b/drivers/video/fbdev/vga16fb.c
@@ -184,6 +184,25 @@ static inline void setindex(int index)
 	vga_io_w(VGA_GFX_I, index);
 }
 
+/* Check if the video mode is supported by the driver */
+static inline int check_mode_supported(void)
+{
+	/* non-x86 architectures treat orig_video_isVGA as a boolean flag */
+#if defined(CONFIG_X86)
+	/* only EGA and VGA in 16 color graphic mode are supported */
+	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EGAC &&
+	    screen_info.orig_video_isVGA != VIDEO_TYPE_VGAC)
+		return -ENODEV;
+
+	if (screen_info.orig_video_mode != 0x0D &&	/* 320x200/4 (EGA) */
+	    screen_info.orig_video_mode != 0x0E &&	/* 640x200/4 (EGA) */
+	    screen_info.orig_video_mode != 0x10 &&	/* 640x350/4 (EGA) */
+	    screen_info.orig_video_mode != 0x12)	/* 640x480/4 (VGA) */
+		return -ENODEV;
+#endif
+	return 0;
+}
+
 static void vga16fb_pan_var(struct fb_info *info, 
 			    struct fb_var_screeninfo *var)
 {
@@ -1422,6 +1441,11 @@ static int __init vga16fb_init(void)
 
 	vga16fb_setup(option);
 #endif
+
+	ret = check_mode_supported();
+	if (ret)
+		return ret;
+
 	ret = platform_driver_register(&vga16fb_driver);
 
 	if (!ret) {