try_wait_for_completion
!try_wait_for_completion(&old_plane_state->commit->hw_done))
completed = try_wait_for_completion(&commit->flip_done);
!try_wait_for_completion(&old_conn_state->commit->flip_done))
!try_wait_for_completion(&old_plane_state->commit->flip_done))
WARN_ON(!try_wait_for_completion(&commit->hw_done));
!try_wait_for_completion(&conn_state->commit->hw_done))
!try_wait_for_completion(&old_plane_state->commit->hw_done))
try_wait_for_completion(&commit->cleanup_done) : true;
!try_wait_for_completion(&conn_state->commit->hw_done))