drm_atomic_get_old_plane_state
old_plane_state = drm_atomic_get_old_plane_state(state, plane);
drm_atomic_get_old_plane_state(state, plane);
drm_atomic_get_old_plane_state(old_state, plane);
return to_intel_plane_state(drm_atomic_get_old_plane_state(&state->base,