[Intel-gfx] [PATCH] drm/i915: Re-enable per-engine reset for Broxton

[Chris Wilson]

Quoting Chris Wilson (2017-08-21 15:55:34)
> Quoting Michel Thierry (2017-08-18 18:23:42)
> > The corruption in CSB mmio reads we were seeing has been tracked down to
> > incorrectly touching forcewake of all domains, following an engine reset.
> > It is still a mistery why we only catched this in Broxton, since it
> > could happen in any platform.
> > 
> > With that fix already merged, commit 4055dc75d6b5 ("drm/i915: Stop
> > touching forcewake following a gen6+ engine reset"), lets try to enable
> > per-engine resets in Broxton one more time.
> > 
> > This reverts commit f188258bde0f ("drm/i915: Disable per-engine reset for
> > Broxton").
> > 
> > Cc: Chris Wilson <chris at chris-wilson.co.uk>
> > Signed-off-by: Michel Thierry <michel.thierry at intel.com>
> 
> My bxt has survived about 72 hours of hang testing, which is far more
> than it was able to previously.
> 
> Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
> Tested-by: Chris Wilson <chris at chris-wilson.co.uk>

Uh oh, seemingly just hit it again...
-Chris