[Intel-gfx] [PATCH v2 1/1] drm/i915: Suspend GuC prior to GPU Reset during GEM suspend

[Chris Wilson]

On Wed, Apr 05, 2017 at 03:51:50PM +0530, Sagar Arun Kamble wrote:
> i915 is currently doing Full GPU reset at the end of suspend followed by
> GuC suspend. This reset bypasses the GuC. We need to tell the GuC to
> suspend before we do a direct intel_gpu_reset, Otherwise the gpu state will
> no longer match the GuC's expectations and its suspend will not be
> successful. With this change, i915 suspends GuC after suspending GEM and
> before doing Full GPU reset.

I'll massage the commit message slightly (much easier when proofreading
someone else's writing). It makes sense to me, any takers from those who
know guc more intimately or at least have observed and tested this patch?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre