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 81eeaff3acb1..89083210855d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8258,6 +8258,8 @@ static bool should_reset_plane(struct drm_atomic_state *state, * TODO: Come up with a more elegant solution for this. */ for_each_oldnew_plane_in_state(state, other, old_other_state, new_other_state, i) { + struct dm_plane_state *old_dm_plane_state, *new_dm_plane_state; + if (other->type == DRM_PLANE_TYPE_CURSOR) continue; @@ -8268,9 +8270,20 @@ static bool should_reset_plane(struct drm_atomic_state *state, if (old_other_state->crtc != new_other_state->crtc) return true; - /* TODO: Remove this once we can handle fast format changes. */ - if (old_other_state->fb && new_other_state->fb && - old_other_state->fb->format != new_other_state->fb->format) + /* Framebuffer checks fall at the end. */ + if (!old_other_state->fb || !new_other_state->fb) + continue; + + /* Pixel format changes can require bandwidth updates. */ + if (old_other_state->fb->format != new_other_state->fb->format) + return true; + + old_dm_plane_state = to_dm_plane_state(old_other_state); + new_dm_plane_state = to_dm_plane_state(new_other_state); + + /* Tiling and DCC changes also require bandwidth updates. */ + if (old_dm_plane_state->tiling_flags != + new_dm_plane_state->tiling_flags) return true; }