From: Ville Syrjälä Date: Wed, 9 Apr 2014 10:28:36 +0000 (+0300) Subject: drm/i915/chv: Implement WaDisableSemaphoreAndSyncFlipWait:chv X-Git-Tag: v4.14-rc1~7391^2~38^2~64 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=acea6f9573904a9591244123afc769139bbd3fc6;p=platform%2Fkernel%2Flinux-rpi.git drm/i915/chv: Implement WaDisableSemaphoreAndSyncFlipWait:chv BDW has the same requirement but the w/a database doens't list this w/a for BDW. Seems to be another one of those "stick a bunch of known workarounds into this bag and write something on the label" type of things. Reviewed-by: Mika Kuoppala Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 7220c11..7bf23c0 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5389,6 +5389,10 @@ static void cherryview_init_clock_gating(struct drm_device *dev) I915_WRITE(GEN7_FF_THREAD_MODE, I915_READ(GEN7_FF_THREAD_MODE) & ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME)); + + /* WaDisableSemaphoreAndSyncFlipWait:chv */ + I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL, + _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE)); } static void g4x_init_clock_gating(struct drm_device *dev)