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drm/virtio: Disable damage clipping if FB changed since last page-flip

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The driver does per-buffer uploads and needs to force a full plane update
if the plane's attached framebuffer has change since the last page-flip.

Fixes: 01f05940a9 ("drm/virtio: Enable fb damage clips property for the primary plane")
Cc: <stable@vger.kernel.org> # v6.4+
Reported-by: nerdopolis <bluescreen_avenger@verizon.net>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218115
Suggested-by: Sima Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Acked-by: Sima Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20231123221315.3579454-3-javierm@redhat.com
This commit is contained in:
Javier Martinez Canillas
2023-11-23 23:13:01 +01:00
parent 35ed38d582
commit 0240db231d
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/virtio/virtgpu_plane.c
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@@ -79,6 +79,8 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
plane);
bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
struct drm_crtc_state *crtc_state;
int ret;
@@ -86,6 +88,14 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
return 0;
/*
* Ignore damage clips if the framebuffer attached to the plane's state
* has changed since the last plane update (page-flip). In this case, a
* full plane update should happen because uploads are done per-buffer.
*/
if (old_plane_state->fb != new_plane_state->fb)
new_plane_state->ignore_damage_clips = true;
crtc_state = drm_atomic_get_crtc_state(state,
new_plane_state->crtc);
if (IS_ERR(crtc_state))