6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michel Dänzer mdaenzer@redhat.com
[ Upstream commit bc0b79ce2050aa523c38c96b6d26340a96bfbdca ]
If no plane was newly enabled or changed scaling, there can be no new scaling mismatch with the cursor plane.
By not pulling non-cursor plane states into all atomic commits while the cursor plane is enabled, this avoids synchronizing all cursor plane changes to vertical blank, which caused the following IGT tests to fail:
kms_cursor_legacy@cursor-vs-flip.* kms_cursor_legacy@flip-vs-cursor.*
Fixes: 003048ddf44b ("drm/amd/display: Check all enabled planes in dm_check_crtc_cursor") Signed-off-by: Michel Dänzer mdaenzer@redhat.com Signed-off-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 33 ++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-)
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 70477a6b896ab..34f011cedd065 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -9906,10 +9906,12 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state, struct drm_crtc *crtc, struct drm_crtc_state *new_crtc_state) { - struct drm_plane *cursor = crtc->cursor, *underlying; + struct drm_plane *cursor = crtc->cursor, *plane, *underlying; + struct drm_plane_state *old_plane_state, *new_plane_state; struct drm_plane_state *new_cursor_state, *new_underlying_state; int i; int cursor_scale_w, cursor_scale_h, underlying_scale_w, underlying_scale_h; + bool any_relevant_change = false;
/* On DCE and DCN there is no dedicated hardware cursor plane. We get a * cursor per pipe but it's going to inherit the scaling and @@ -9917,6 +9919,35 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state, * blending properties match the underlying planes'. */
+ /* If no plane was enabled or changed scaling, no need to check again */ + for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { + int new_scale_w, new_scale_h, old_scale_w, old_scale_h; + + if (!new_plane_state || !new_plane_state->fb || new_plane_state->crtc != crtc) + continue; + + if (!old_plane_state || !old_plane_state->fb || old_plane_state->crtc != crtc) { + any_relevant_change = true; + break; + } + + if (new_plane_state->fb == old_plane_state->fb && + new_plane_state->crtc_w == old_plane_state->crtc_w && + new_plane_state->crtc_h == old_plane_state->crtc_h) + continue; + + dm_get_plane_scale(new_plane_state, &new_scale_w, &new_scale_h); + dm_get_plane_scale(old_plane_state, &old_scale_w, &old_scale_h); + + if (new_scale_w != old_scale_w || new_scale_h != old_scale_h) { + any_relevant_change = true; + break; + } + } + + if (!any_relevant_change) + return 0; + new_cursor_state = drm_atomic_get_plane_state(state, cursor); if (IS_ERR(new_cursor_state)) return PTR_ERR(new_cursor_state);