CRTC_EXT
if (output_present[CRTC_EXT]) {
ret = mtk_drm_of_ddp_path_build_one(dev, CRTC_EXT,
all_drm_priv[CRTC_EXT] = temp_drm_priv;
} else if (i == CRTC_EXT && priv_n->data->ext_len) {