[Intel-gfx] [RFT i-g-t] tests/prime_vgem/basic-fence-flip: Probe display resolution

[Kahola, Mika]

On Wed, 2019-04-10 at 13:11 +0100, Tvrtko Ursulin wrote:
> On 10/04/2019 12:48, Chris Wilson wrote:
> > Quoting Tvrtko Ursulin (2019-04-10 12:43:22)
> > > @@ -754,8 +768,8 @@ static void test_flip(int i915, int vgem,
> > > unsigned hang)
> > >                  uint32_t offsets[4] = {};
> > >                  int fd;
> > >   
> > > -               bo[i].width = 1024;
> > > -               bo[i].height = 768;
> > > +               bo[i].width = mode->hdisplay;
> > > +               bo[i].height = mode->vdisplay;
> > >                  bo[i].bpp = 32;
> > >                  vgem_create(vgem, &bo[i]);
> > 
> > That may not result in a buffer that we are able to flip to. :|
> > width = ALIGN(hdisplay, 16); vdisplay should be ok.
> 
> Oh.. well I don't know. Maarten helpfully described in the BZ that
> the 
> skip is due BO being too small for the FB. Aligning width would then 
> make it too large. Is that OK? Who assigned this display related IGT
> bug 
> to me anyway? :))
I don't know about that. I have a task to improve the test in my
backlog too :) 

This patch definitely improves the test. However, I wasn't able to
apply the patch cleanly on my tree. Maybe it needs a rebase? Anyway, CI
seems to be happy with the change. 

Reviewed-by: Mika Kahola <mika.kahola at intel.com>

> 
> > I would query what happened to the scalers though :)
> 
> Are they supposed to automagicaly apply any fb to any output? Or an 
> explicit step is required? Regardless - it may be better to involve
> less 
> of the driver and hardware stack in a simple test.
> 
> Regards,
> 
> Tvrtko
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