[Intel-gfx] [for-CI-v2] drm/i915/mocs: Program MOCS for all engines on init

[Dave Gordon]

On 15/04/16 12:26, Chris Wilson wrote:
> On Fri, Apr 15, 2016 at 10:16:25AM +0100, Peter Antoine wrote:
>> Thanks for tidying up and pushing.
>
> Fwiw, I extended the test to demonstrate that !rcs engines are also
> suspectible to the same pollution where one process can affect the
> register settings of an another.
> -Chris

Try INSTPM, bits 6 and 7 . The hardware saves & restores it properly 
(AFAICT) but the driver muddles up settings from different contexts :(

.Dave.