[Intel-gfx] [PATCH] drm/i915/cnl: Add Wa_2201832410

[Rodrigo Vivi]

On Thu, Mar 08, 2018 at 12:30:07PM +0200, Jani Nikula wrote:
> On Wed, 07 Mar 2018, Rodrigo Vivi <rodrigo.vivi at intel.com> wrote:
> > On Wed, Mar 07, 2018 at 02:48:05PM -0800, Rafael Antognolli wrote:
> >> Matches bspec.
> >> 
> >> Reviewed-by: Rafael Antognolli <rafael.antognolli at intel.com>
> >
> > pushed, thanks
> 
> Okay, too late now, but I think "Add Wa_2201832410" as a commit title is
> insufficient. Even a few words around it about the change would be
> appreciated.

yeap... good point.

usually wa names had some WaSomeInformationOnName and I got used to only
use that as subject... This round of Wa came only with HSD number on it.
But we should be able to add few useful information on subject indeed.

Noted for next Wa_<#hsdesnumber>....

thanks for the feedback.

> 
> Thanks,
> Jani.
> 
> 
> >
> >> 
> >> On Wed, Mar 07, 2018 at 02:09:12PM -0800, Rodrigo Vivi wrote:
> >> > "Clock gating bug in GWL may not clear barrier state when an EOT
> >> > is received, causing a hang the next time that barrier is used."
> >> > 
> >> > HSDES: 2201832410
> >> > 
> >> > Cc: Rafael Antognolli <rafael.antognolli at intel.com>
> >> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> >> > ---
> >> >  drivers/gpu/drm/i915/i915_reg.h | 3 +++
> >> >  drivers/gpu/drm/i915/intel_pm.c | 5 +++++
> >> >  2 files changed, 8 insertions(+)
> >> > 
> >> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> >> > index 4787d9bf58b9..e6a8c0ee7df1 100644
> >> > --- a/drivers/gpu/drm/i915/i915_reg.h
> >> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> >> > @@ -3965,6 +3965,9 @@ enum {
> >> >  #define  SARBUNIT_CLKGATE_DIS		(1 << 5)
> >> >  #define  RCCUNIT_CLKGATE_DIS		(1 << 7)
> >> >  
> >> > +#define SUBSLICE_UNIT_LEVEL_CLKGATE	_MMIO(0x9524)
> >> > +#define  GWUNIT_CLKGATE_DIS		(1 << 16)
> >> > +
> >> >  #define UNSLICE_UNIT_LEVEL_CLKGATE	_MMIO(0x9434)
> >> >  #define  VFUNIT_CLKGATE_DIS		(1 << 20)
> >> >  
> >> > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> >> > index 6cab20ce167a..b8da4dcdd584 100644
> >> > --- a/drivers/gpu/drm/i915/intel_pm.c
> >> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> >> > @@ -8522,6 +8522,11 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
> >> >  		val |= SARBUNIT_CLKGATE_DIS;
> >> >  	I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, val);
> >> >  
> >> > +	/* Wa_2201832410:cnl */
> >> > +	val = I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE);
> >> > +	val |= GWUNIT_CLKGATE_DIS;
> >> > +	I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE, val);
> >> > +
> >> >  	/* WaDisableVFclkgate:cnl */
> >> >  	/* WaVFUnitClockGatingDisable:cnl */
> >> >  	val = I915_READ(UNSLICE_UNIT_LEVEL_CLKGATE);
> >> > -- 
> >> > 2.13.6
> >> > 
> > _______________________________________________
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> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center