[Intel-gfx] [PATCH 2/2] drm/i915: don't frob the vblank ts in finish_page_flip

[Daniel Vetter]

Now that we correctly generate it, this hack is no longer required (and
might actually paper over a serious bug).

pageflip timestamps are sanity check in the latest version of the flip-test
in intel-gpu-tools.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c |   19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 57c1309..87f825c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6203,25 +6203,6 @@ static void do_intel_finish_page_flip(struct drm_device *dev,
 		e = work->event;
 		e->event.sequence = drm_vblank_count_and_time(dev, intel_crtc->pipe, &tvbl);
 
-		/* Called before vblank count and timestamps have
-		 * been updated for the vblank interval of flip
-		 * completion? Need to increment vblank count and
-		 * add one videorefresh duration to returned timestamp
-		 * to account for this. We assume this happened if we
-		 * get called over 0.9 frame durations after the last
-		 * timestamped vblank.
-		 *
-		 * This calculation can not be used with vrefresh rates
-		 * below 5Hz (10Hz to be on the safe side) without
-		 * promoting to 64 integers.
-		 */
-		if (10 * (timeval_to_ns(&tnow) - timeval_to_ns(&tvbl)) >
-		    9 * crtc->framedur_ns) {
-			e->event.sequence++;
-			tvbl = ns_to_timeval(timeval_to_ns(&tvbl) +
-					     crtc->framedur_ns);
-		}
-
 		e->event.tv_sec = tvbl.tv_sec;
 		e->event.tv_usec = tvbl.tv_usec;
 
-- 
1.7.10