On Mon, 4 Nov 2013 22:52:39 -0800 Ben Widawsky <benjamin.widawsky@xxxxxxxxx> wrote: > From: Ben Widawsky <ben@xxxxxxxxxxxx> > > BDW-A workaround > > BDW Bug #1899532 > > v2: WARN on when not using preliminary HW support > > Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx> > --- > drivers/gpu/drm/i915/i915_reg.h | 3 +++ > drivers/gpu/drm/i915/intel_pm.c | 4 ++++ > 2 files changed, 7 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index 050f8c1..98961ef 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -4989,6 +4989,9 @@ > #define HSW_ROW_CHICKEN3 0xe49c > #define HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE (1 << 6) > > +#define HALF_SLICE_CHICKEN3 0xe184 > +#define GEN8_CENTROID_PIXEL_OPT_DIS (1<<8) > + > #define G4X_AUD_VID_DID (dev_priv->info->display_mmio_offset + 0x62020) > #define INTEL_AUDIO_DEVCL 0x808629FB > #define INTEL_AUDIO_DEVBLC 0x80862801 > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index e6e12e1..66b5a1c 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -5286,6 +5286,10 @@ static void gen8_init_clock_gating(struct drm_device *dev) > I915_WRITE(WM2_LP_ILK, 0); > I915_WRITE(WM1_LP_ILK, 0); > > + WARN(!i915_preliminary_hw_support, > + "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n"); > + I915_WRITE(HALF_SLICE_CHICKEN3, > + _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS)); > I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE)); > > /* WaSwitchSolVfFArbitrationPriority */ Reviewed-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> -- Jesse Barnes, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
