Dropping WA because it was for early steppings.

It is fixed in newer preproduction and all production revisions.

Cc: Michal Winiarski <michal.winiar...@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hi...@intel.com>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c 
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e107455..32786ba 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -849,10 +849,8 @@ static int gen9_init_workarounds(struct intel_engine_cs 
*engine)
                 */
        }
 
-       /* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl */
        /* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl */
        WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
-                         GEN9_ENABLE_YV12_BUGFIX |
                          GEN9_ENABLE_GPGPU_PREEMPTION);
 
        /* Wa4x4STCOptimizationDisable:skl,bxt,kbl */
-- 
2.7.4
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