[Intel-gfx] [PATCH] drm/i915: set scan-buffer as uncached on Sandybridge

[Dave Airlie]

On Mon, Oct 25, 2010 at 11:42 AM, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> Display engine on Sandybridge is not coherent with LLC, so
> try to always bind display buffer as uncached on Sandybridge.
> This fixed screen artifacts seen by using blit engine on Sandybridge.

Also I assume you need to set this back to the other state on unbind,
for pageflipping type apps where we'd reuse the buffers.

Dave.