gpu/drm/drm_vblank.c

241 	u32 cur_vblank;
253 		cur_vblank = __get_vblank_counter(dev, pipe);
255 	} while (cur_vblank != __get_vblank_counter(dev, pipe) && --count > 0);
269 	store_vblank(dev, pipe, 1, t_vblank, cur_vblank);
290 	u32 cur_vblank, diff;
310 		cur_vblank = __get_vblank_counter(dev, pipe);
312 	} while (cur_vblank != __get_vblank_counter(dev, pipe) && --count > 0);
316 		diff = (cur_vblank - vblank->last) & max_vblank_count;
359 		    diff, cur_vblank, vblank->last);
362 		drm_WARN_ON_ONCE(dev, cur_vblank != vblank->last);
375 	store_vblank(dev, pipe, diff, t_vblank, cur_vblank);
1545 	u32 cur_vblank, diff = 1;
1562 		cur_vblank = __get_vblank_counter(dev, pipe);
1564 	} while (cur_vblank != __get_vblank_counter(dev, pipe) && --count > 0);
1573 		    diff, diff_ns, framedur_ns, cur_vblank - vblank->last);
1574 	vblank->last = (cur_vblank - diff) & max_vblank_count;