[Intel-gfx] [PATCH 2/4] drm/i915: Verify the engine workarounds stick on application
chris at chris-wilson.co.uk
Mon Apr 15 10:55:10 UTC 2019
Quoting Chris Wilson (2019-04-15 11:45:47)
> Quoting Tvrtko Ursulin (2019-04-15 11:41:43)
> > On 13/04/2019 13:58, Chris Wilson wrote:
> > > Read the engine workarounds back using the GPU after loading the initial
> > > context state to verify that we are setting them correctly, and bail if
> > > it fails.
> > Aren't the context wa/ ones we expect to see saved in the context? As
> > such, what difference do you expect to see between mmio and srm
> > verification? Should even both be done?
> I was following a hunch that maybe these were being saved in the
> powercontext and so we needed an active engine to be able to read --
> just ruling out that maybe forcewake wasn't enough.
And yes, we do end up doing both read method to verify the writes :)
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