This is a note to let you know that I've just added the patch titled
drm/amd/display: Check all enabled planes in dm_check_crtc_cursor
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-check-all-enabled-planes-in-dm_check.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d239de1a7793a91bc4ff096fd8f2b13f2fcaf9ec
Author: Michel Dänzer <mdaenzer@xxxxxxxxxx>
Date: Tue Sep 12 12:22:24 2023 +0200
drm/amd/display: Check all enabled planes in dm_check_crtc_cursor
[ Upstream commit 003048ddf44b1a6cfa57afa5a0cf40673e13f1ba ]
It was only checking planes which had any state changes in the same
commit. However, it also needs to check other enabled planes.
Not doing this meant that a commit might spuriously "succeed", resulting
in the cursor plane displaying with incorrect scaling. See
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3177#note_1824263
for an example.
Fixes: d1bfbe8a3202 ("amd/display: check cursor plane matches underlying plane")
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Michel Dänzer <mdaenzer@xxxxxxxxxx>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4120ae9d10248..342988f52d960 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9908,14 +9908,24 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state,
* blending properties match the underlying planes'.
*/
- new_cursor_state = drm_atomic_get_new_plane_state(state, cursor);
- if (!new_cursor_state || !new_cursor_state->fb)
+ new_cursor_state = drm_atomic_get_plane_state(state, cursor);
+ if (IS_ERR(new_cursor_state))
+ return PTR_ERR(new_cursor_state);
+
+ if (!new_cursor_state->fb)
return 0;
dm_get_oriented_plane_size(new_cursor_state, &cursor_src_w, &cursor_src_h);
cursor_scale_w = new_cursor_state->crtc_w * 1000 / cursor_src_w;
cursor_scale_h = new_cursor_state->crtc_h * 1000 / cursor_src_h;
+ /* Need to check all enabled planes, even if this commit doesn't change
+ * their state
+ */
+ i = drm_atomic_add_affected_planes(state, crtc);
+ if (i)
+ return i;
+
for_each_new_plane_in_state_reverse(state, underlying, new_underlying_state, i) {
/* Narrow down to non-cursor planes on the same CRTC as the cursor */
if (new_underlying_state->crtc != crtc || underlying == crtc->cursor)
