[Intel-gfx] [PATCH] HAX drm/i915: Disable CSR (DMC) for Kabylake

[Rodrigo Vivi]

On Thu, Oct 12, 2017 at 07:43:04PM +0000, Chris Wilson wrote:
> Quoting Rodrigo Vivi (2017-10-12 19:04:45)
> > On Thu, Oct 12, 2017 at 10:18:13AM +0000, Chris Wilson wrote:
> > > ---
> > 
> > Why?
> 
> Have you looked at the random but frequent mmio death on Kabylake?
> Seems rather reminiscent of earlier DMC bugs.

hm... Could you please give us an example?
a link?

and why do you think that would be dmc?

I've seen many bugs there on kbl, but mostly associated to LSPCON
and link trainings, and gpu hangs... and the ones I looked now
seemed that DC state was blocked.

But well... yeap... it is a black box right?! so the
experiment is valid for sure.

> -Chris