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

[Tvrtko Ursulin]

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 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