diff options
| -rwxr-xr-x | tests/kms_flip.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tests/kms_flip.c b/tests/kms_flip.c index b9729dfd..05ea3df0 100755 --- a/tests/kms_flip.c +++ b/tests/kms_flip.c @@ -1118,8 +1118,17 @@ static void calibrate_ts(struct test_output *o, int crtc_idx) wait.request.type |= DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT; wait.request.sequence = last_seq; for (n = 0; n < CALIBRATE_TS_STEPS; n++) { + drmVBlank check = {}; + ++wait.request.sequence; do_or_die(drmWaitVBlank(drm_fd, &wait)); + + /* Double check that haven't already missed the vblank */ + check.request.type = kmstest_get_vbl_flag(crtc_idx); + check.request.type |= DRM_VBLANK_RELATIVE; + do_or_die(drmWaitVBlank(drm_fd, &check)); + + igt_assert(!igt_vblank_after(check.reply.sequence, wait.request.sequence)); } igt_stats_init_with_size(&stats, CALIBRATE_TS_STEPS); |