mtk_disp_mutex_prepare  249 drivers/gpu/drm/mediatek/mtk_drm_crtc.c 	ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
mtk_disp_mutex_prepare   23 drivers/gpu/drm/mediatek/mtk_drm_ddp.h int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex);