drm_atomic_get_old_private_obj_state
priv_st = drm_atomic_get_old_private_obj_state(state, &c->obj);
priv_st = drm_atomic_get_old_private_obj_state(state, &pipe->obj);
drm_atomic_get_old_private_obj_state(state, &mgr->base);
EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
priv_state = drm_atomic_get_old_private_obj_state(state, &vc4->hvs_channels);
drm_atomic_get_old_private_obj_state(const struct drm_atomic_commit *state,