[Intel-gfx] [PATCH] drm/i915: Disable SAMPLER_STATE prefetching on all Gen11 steppings.

[Chris Wilson]

Quoting Mika Kuoppala (2019-06-25 10:48:22)
> Chris Wilson <chris at chris-wilson.co.uk> writes:
> 
> > From: Kenneth Graunke <kenneth at whitecape.org>
> >
> > The Demand Prefetch workaround (binding table prefetching) only applies
> > to Icelake A0/B0.  But the Sampler Prefetch workaround needs to be
> > applied to all Gen11 steppings, according to a programming note in the
> > SARCHKMD documentation.
> >
> > Using the Intel Gallium driver, I have seen intermittent failures in
> > the dEQP-GLES31.functional.copy_image.non_compressed.* tests.  After
> > applying this workaround, the tests reliably pass.
> >
> > v2: Remove the overlap with a pre-production w/a
> >
> > BSpec: 9663
> > Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: stable at vger.kernel.org
> 
> Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

And pushed. Thanks for the patch!
-Chris