On Thu, Nov 10, 2016 at 12:20:51PM +0200, Petri Latvala wrote:
> On Thu, Nov 10, 2016 at 08:05:19AM +0000, Chris Wilson wrote:
> > A raw pageflip is nonblocking and asynchronous, but
> > kms_frontbuffer_tracking persumed that it was synchronous and completed
> > before the funtion returns. It doesn't, so the CRC could be sampled
> > before the flip completed.
> >
> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > ---
> > tests/kms_frontbuffer_tracking.c | 8 --------
> > 1 file changed, 8 deletions(-)
> >
> > diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
> > index bc42701..343b124 100644
> > --- a/tests/kms_frontbuffer_tracking.c
> > +++ b/tests/kms_frontbuffer_tracking.c
> > @@ -122,7 +122,6 @@ struct test_mode {
> > * and they exercise slightly different codepaths inside the Kernel. */
> > enum flip_type {
> > FLIP_PAGEFLIP,
> > - FLIP_PAGEFLIP_EVENT,
> > FLIP_MODESET,
> > FLIP_PLANES,
> > FLIP_COUNT,
> > @@ -2322,11 +2321,6 @@ static void page_flip_for_params(struct modeset_params *params,
> > switch (type) {
> > case FLIP_PAGEFLIP:
> > rc = drmModePageFlip(drm.fd, params->crtc_id,
> > - params->fb.fb->fb_id, 0, NULL);
> > - igt_assert_eq(rc, 0);
> > - break;
> > - case FLIP_PAGEFLIP_EVENT:
> > - rc = drmModePageFlip(drm.fd, params->crtc_id,
> > params->fb.fb->fb_id,
> > DRM_MODE_PAGE_FLIP_EVENT, NULL);
> > igt_assert_eq(rc, 0);
>
> This makes FLIP_PAGEFLIP pass DRM_MODE_PAGE_FLIP_EVENT. Is that intentional?
Yes. The FLIP_PAGEFLIP code is broken. After removal only
FLIP_PAGEFLIP_EVENT remains and so differentiating it is pointless.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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