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

2013-02-17 Thread Daniel Vetter
On Wed, Feb 13, 2013 at 09:31:53AM +, 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

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

2013-02-13 Thread Paul Menzel
Am Mittwoch, den 13.02.2013, 09:31 + schrieb Chris Wilson: > 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 Either remove using or add an s to fail. ;-) > looks like the majority of the writes do

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

2013-02-13 Thread Chris Wilson
On Wed, Feb 13, 2013 at 09:25:58AM +, 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

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

2013-02-13 Thread Chris Wilson
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. v2: s/ Bugzilla: https://bugzilla.freedeskto

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

2013-02-13 Thread Chris Wilson
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. Reported-by: Nathan Myers Bugzilla: https:/