drm_atomic_helper_duplicate_state
state = drm_atomic_helper_duplicate_state(dev, &ctx);
EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
state = drm_atomic_helper_duplicate_state(dev, &ctx);
state = drm_atomic_helper_duplicate_state(dev, ctx);
drm_atomic_helper_duplicate_state(struct drm_device *dev,