drm_atomic_state_init
EXPORT_SYMBOL(drm_atomic_state_init);
if (drm_atomic_state_init(dev, state) < 0) {
if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);