vblank_passed
if (vblank_passed(seq, req_seq)) {
vblank_passed(seq, req_seq)) {
vblank_passed(drm_vblank_count(dev, pipe),
if (!vblank_passed(seq, e->sequence))
if ((flags & DRM_CRTC_SEQUENCE_NEXT_ON_MISS) && vblank_passed(seq, req_seq))
if (vblank_passed(seq, req_seq)) {