[Intel-gfx] [PATCH i-g-t 6/6] tests/kms_flip: Check that the last vs. current seq/ts are consistent

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Let's make sure the ts vs. seq difference between the current and last
events match.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 tests/kms_flip.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/kms_flip.c b/tests/kms_flip.c
index f685c945feb1..72899d9a7157 100644
--- a/tests/kms_flip.c
+++ b/tests/kms_flip.c
@@ -693,6 +693,13 @@ static void check_state(const struct test_output *o, const struct event_state *e
 		timersub(&es->current_ts, &es->last_ts, &diff);
 		usec_diff = diff.tv_sec * USEC_PER_SEC + diff.tv_usec;
 
+		usec_interflip = (es->current_seq - es->last_seq) * frame_time(o);
+		igt_assert_f(fabs((usec_diff - usec_interflip) /
+				  usec_interflip) <= 0.005,
+			     "inconsistent %s ts/seq: last %ld.%06ld/%u, current %ld.%06ld/%u\n",
+			     es->name, es->last_ts.tv_sec, es->last_ts.tv_usec, es->last_seq,
+			     es->current_ts.tv_sec, es->current_ts.tv_usec, es->current_seq);
+
 		usec_interflip = o->seq_step * frame_time(o);
 		igt_assert_f(fabs((usec_diff - usec_interflip) /
 				  usec_interflip) <= 0.005,
-- 
2.7.4