[Intel-gfx] [PATCH 10/22] drm/i915/icl: Wa_1406680159 and Wa_2201832410

[Rodrigo Vivi]

On Fri, Apr 20, 2018 at 01:49:45PM -0700, Oscar Mateo wrote:
> 
> 
> On 04/20/2018 01:46 PM, Rodrigo Vivi wrote:
> > On Fri, Apr 20, 2018 at 01:33:54PM -0700, Oscar Mateo wrote:
> > > Disable GWL clock gating to prevent two different issues that
> > > might cause hangs.
> > > 
> > > Please notice that one of the issues is pre-production only.
> > > 
> > > v2: Rebased on top of the WA refactoring
> > > 
> > > Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> > > Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
> > > ---
> > >   drivers/gpu/drm/i915/intel_workarounds.c | 6 ++++++
> > >   1 file changed, 6 insertions(+)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
> > > index 50d5507..2c792d7 100644
> > > --- a/drivers/gpu/drm/i915/intel_workarounds.c
> > > +++ b/drivers/gpu/drm/i915/intel_workarounds.c
> > > @@ -751,6 +751,12 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
> > >   		I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE,
> > >   			   (I915_READ(SLICE_UNIT_LEVEL_CLKGATE) |
> > >   			    MSCUNIT_CLKGATE_DIS));
> > > +
> > > +	/* Wa_1406680159:icl */
> > > +	/* Wa_2201832410:icl (pre-prod, only until C0) */
> > what about adding the REVID checks?
> > 
> > but, well, why one is pre-prod and other is forever?
> 
> That's the thing: this is the same workaround for two different HW problems.
> One is fixed post-C0, but the other is not, so I cannot add REVID checks :(

Oh of course... Makes sense. Thanks ;)

> 
> > 
> > > +	I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE,
> > > +		   (I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE) |
> > > +		    GWUNIT_CLKGATE_DIS));
> > >   }
> > >   void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
> > > -- 
> > > 1.9.1
> > > 
> > > _______________________________________________
> > > Intel-gfx mailing list
> > > Intel-gfx at lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
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