From bfd8ad4e4a180b95d500c76280ddc01f23f92b9d Mon Sep 17 00:00:00 2001 From: Tim Gore Date: Tue, 19 Apr 2016 15:45:52 +0100 Subject: [PATCH] drm/i915/gen9: implement WaEnableSamplerGPGPUPreemptionSupport WaEnableSamplerGPGPUPreemptionSupport fixes a problem related to mid thread pre-emption. Signed-off-by: Tim Gore Reviewed-by: Dave Gordon Signed-off-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/1461077152-31899-1-git-send-email-tim.gore@intel.com --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_ringbuffer.c | 7 ++++--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f0a6d85c925f..c21b71c86a6b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7180,6 +7180,7 @@ enum skl_disp_power_wells { #define GEN9_HALF_SLICE_CHICKEN7 _MMIO(0xe194) #define GEN9_ENABLE_YV12_BUGFIX (1<<4) +#define GEN9_ENABLE_GPGPU_PREEMPTION (1<<2) /* Audio */ #define G4X_AUD_VID_DID _MMIO(dev_priv->info.display_mmio_offset + 0x62020) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 0d24494904ef..444d30adf60d 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -959,9 +959,10 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine) } /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt */ - if (IS_SKL_REVID(dev, SKL_REVID_C0, REVID_FOREVER) || IS_BROXTON(dev)) - WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, - GEN9_ENABLE_YV12_BUGFIX); + /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt */ + WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, + GEN9_ENABLE_YV12_BUGFIX | + GEN9_ENABLE_GPGPU_PREEMPTION); /* Wa4x4STCOptimizationDisable:skl,bxt */ /* WaDisablePartialResolveInVc:skl,bxt */ -- 2.20.1