drm/i915/gen9: Remove WaEnableYV12BugFixInHalfSliceChicken7

Dropping WA because it was for early steppings.

It is fixed in newer preproduction and all production revisions.

v2: add references, updated commit message

References: HSD#2126385, HSD#2131381, BSID#0764
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Winiarski <michal.winiarski@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476977460-28088-1-git-send-email-arkadiusz.hiler@intel.com

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e107455b0168..32786ba199b9 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 */