[Intel-gfx] [PATCH] drm/i915: Disable WC PTE updates to w/a buggy IOMMU on ILK

[Chris Wilson]

On Wed, Feb 13, 2013 at 09:25:58AM +0000, Chris Wilson wrote:
> Whilst IOMMU is enabled for the Intel GPU on Ironlake, it appears that
> using WC writes to update the PTE on the GPU fail miserably. The result
> looks like the majority of the writes do not land leading to lots of
> screen corruption and a hard system hang.

New version en route to fix buggy conversion of INTEL_GTT_GEN < 6.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre