mgag200_crtc_helper_atomic_flush
void mgag200_crtc_helper_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *old_state);
.atomic_flush = mgag200_crtc_helper_atomic_flush, \
.atomic_flush = mgag200_crtc_helper_atomic_flush,
.atomic_flush = mgag200_crtc_helper_atomic_flush,
.atomic_flush = mgag200_crtc_helper_atomic_flush,