to_dm_atomic_state
struct dm_atomic_state *dm_state = to_dm_atomic_state(dm->atomic_obj.state);
*dm_state = to_dm_atomic_state(priv_state);
return to_dm_atomic_state(new_obj_state);
old_state = to_dm_atomic_state(obj->state);
struct dm_atomic_state *dm_state = to_dm_atomic_state(state);