| Message ID | 1464621020-25650-1-git-send-email-mika.kuoppala@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, May 30, 2016 at 06:10:20PM +0300, Mika Kuoppala wrote: > According to bspec this prevents screen corruption when fbc is > used. > > v2: This workaround has a name, use it (Ville) > v3: remove bogus gen check on ilk/vlv wm path (Ville) > > References: HSD#2135555, HSD#2137270, BSID#562 > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> > Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> > --- > drivers/gpu/drm/i915/intel_pm.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 9ae1b0646678..6b972ae53bec 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -68,6 +68,10 @@ static void gen9_init_clock_gating(struct drm_device *dev) > /* WaEnableChickenDCPR:skl,bxt,kbl */ > I915_WRITE(GEN8_CHICKEN_DCPR_1, > I915_READ(GEN8_CHICKEN_DCPR_1) | MASK_WAKEMEM); > + > + /* WaFbcTurnOffFbcWatermark:skl,bxt,kbl */ > + I915_WRITE(DISP_ARB_CTL, > + I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); > } > > static void bxt_init_clock_gating(struct drm_device *dev) > -- > 2.5.0
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 9ae1b0646678..6b972ae53bec 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -68,6 +68,10 @@ static void gen9_init_clock_gating(struct drm_device *dev) /* WaEnableChickenDCPR:skl,bxt,kbl */ I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) | MASK_WAKEMEM); + + /* WaFbcTurnOffFbcWatermark:skl,bxt,kbl */ + I915_WRITE(DISP_ARB_CTL, + I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS); } static void bxt_init_clock_gating(struct drm_device *dev)
According to bspec this prevents screen corruption when fbc is used. v2: This workaround has a name, use it (Ville) v3: remove bogus gen check on ilk/vlv wm path (Ville) References: HSD#2135555, HSD#2137270, BSID#562 Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> --- drivers/gpu/drm/i915/intel_pm.c | 4 ++++ 1 file changed, 4 insertions(+)