On Wed, 07 Mar 2018, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> wrote:
> On Wed, Mar 07, 2018 at 02:48:05PM -0800, Rafael Antognolli wrote:
>> Matches bspec.
>>
>> Reviewed-by: Rafael Antognolli <rafael.antognolli@xxxxxxxxx>
>
> 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.
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@xxxxxxxxx>
>> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
>> > ---
>> > 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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--
Jani Nikula, Intel Open Source Technology Center
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