On Thu, Feb 27, 2014 at 10:43:34AM +0200, Ville Syrjälä wrote: > On Wed, Feb 26, 2014 at 11:59:31PM -0800, Kenneth Graunke wrote: > > Ben and I believe this will be necessary on production hardware. > > > > Signed-off-by: Kenneth Graunke <kenneth@xxxxxxxxxxxxx> > > --- > > drivers/gpu/drm/i915/i915_reg.h | 1 + > > drivers/gpu/drm/i915/intel_pm.c | 4 ++++ > > 2 files changed, 5 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > > index f36d5e0..ade1d71 100644 > > --- a/drivers/gpu/drm/i915/i915_reg.h > > +++ b/drivers/gpu/drm/i915/i915_reg.h > > @@ -5052,6 +5052,7 @@ > > > > #define GEN8_ROW_CHICKEN 0xe4f0 > > #define PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE (1<<8) > > +#define STALL_DOP_GATING_DISABLE (1<<5) > > > > #define GEN7_ROW_CHICKEN2 0xe4f4 > > #define GEN7_ROW_CHICKEN2_GT2 0xf4f4 > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > > index df8ad21..226591d 100644 > > --- a/drivers/gpu/drm/i915/intel_pm.c > > +++ b/drivers/gpu/drm/i915/intel_pm.c > > @@ -4842,6 +4842,10 @@ static void gen8_init_clock_gating(struct drm_device *dev) > > I915_WRITE(GEN8_ROW_CHICKEN, > > _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE)); > > > > + /* WaDisableThreadStallDopClockGating:bdw */ > > + I915_WRITE(GEN8_ROW_CHICKEN, > > + _MASKED_BIT_ENABLE(STALL_DOP_GATING_DISABLE)); > > The spec and w/a database are a bit confused on this, but I get the > impression that you're correct. So: > > Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Actually I might have to take that back a bit. Looks more like it shouldn't be needed for production hardware, but I'm guessing people currently have hardware that needs it, so we should have it at least for now. > > > + > > /* > > * This GEN8_CENTROID_PIXEL_OPT_DIS W/A is only needed for > > * pre-production hardware > > -- > > 1.8.4.2 > > > > _______________________________________________ > > Intel-gfx mailing list > > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx > > -- > Ville Syrjälä > Intel OTC -- Ville Syrjälä Intel OTC _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
