[Mesa-dev] [PATCH] kms_flip: Improve the accuracy of out frame time calculation

2014-08-11 Thread ville . syrjala
From: Ville Syrjälä ville.syrj...@linux.intel.com

Don't use the rounded vrefresh info to predict the frame duration.
Instead calculate if from the clock.
---
 tests/kms_flip.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/kms_flip.c b/tests/kms_flip.c
index 227a176..f609ac0 100644
--- a/tests/kms_flip.c
+++ b/tests/kms_flip.c
@@ -431,7 +431,7 @@ static void page_flip_handler(int fd, unsigned int frame, 
unsigned int sec,
 
 static double frame_time(struct test_output *o)
 {
-   return 1000.0 * 1000.0 / o-kmode[0].vrefresh;
+   return 1000.0 * o-kmode[0].htotal * o-kmode[0].vtotal / 
o-kmode[0].clock;
 }
 
 static void fixup_premature_vblank_ts(struct test_output *o,
@@ -1017,7 +1017,7 @@ static void check_final_state(struct test_output *o, 
struct event_state *es,
int count = es-count;
 
count *= es-seq_step;
-   expected = elapsed * o-kmode[0].vrefresh / (1000 * 1000);
+   expected = elapsed / frame_time(o);
igt_assert_f(count = expected * 99/100  count = expected * 
101/100,
 dropped frames, expected %d, counted %d, encoder 
type %d\n,
 expected, count, o-kencoder[0]-encoder_type);
-- 
1.8.1.5

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Re: [Mesa-dev] [PATCH] kms_flip: Improve the accuracy of out frame time calculation

2014-08-11 Thread Ville Syrjälä
Sorry, ignore these. Shell history and fast fingers are a dangerous
combination...

-- 
Ville Syrjälä
Intel OTC
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