Re: [PATCH v5] drm/i915: Restore GT performance in headless mode with DMC loaded

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On Sat, Dec 02, 2017 at 02:05:42AM +0200, Rogozhkin, Dmitry V wrote:
> On Thu, 2017-11-30 at 13:19 +0200, Imre Deak wrote:
> > > > +#define NEEDS_CSR_GT_PERF_WA(dev_priv) \
> > > > +       (HAS_CSR(dev_priv) && IS_GEN9(dev_priv) && !
> > IS_SKYLAKE(dev_priv))
> > 
> > Nitpick: could be just !IS_SKYLAKE(), but works in the above way too.
> > For all other platforms the GT_IRQ domain won't be mapped making
> > display_power_get/put on those just a domain ref inc/dec, otherwise a
> > nop.
> 
> Why not +&& !IS_BROXTON(dev_priv) by the way?

We have the same slow-down problem on APL/BXT (and we don't have the DC6
corruption problem there).

--Imre
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