[Intel-gfx] [PATCH] drm/i915/gen9: Reintroduce WaEnableYV12BugFixInHalfSliceChicken7

[Mika Kuoppala]

Arkadiusz Hiler <arkadiusz.hiler at intel.com> writes:

> This basically reverts commit 465418c6064c
> ("drm/i915/gen9: Remove WaEnableYV12BugFixInHalfSliceChicken7")
> with small addition - marking it as affecting KBL as well.

s/KBL/GLK

Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

>
> It was incorrectly considered fixed in production steppings.
>
> References: HSD#2126385, HSD#2131381, HSDES#1504433555, BSID#0764
> Cc: Mika Kuoppala <mika.kuoppala at intel.com>
> Cc: Jeff McGee <jeff.mcgee at intel.com>
> Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_engine_cs.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index 483ed76..49c2315 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -851,8 +851,10 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine)
>  		 */
>  	}
>  
> +	/* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk */
>  	/* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl */
>  	WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
> +			  GEN9_ENABLE_YV12_BUGFIX |
>  			  GEN9_ENABLE_GPGPU_PREEMPTION);
>  
>  	/* Wa4x4STCOptimizationDisable:skl,bxt,kbl,glk */
> -- 
> 2.9.3