[Intel-gfx] [PATCH 2/4] drm/i915/cnl: Add WaDisableReplayBufferBankArbitrationOptimization

[Oscar Mateo]

On 07/05/2017 06:02 PM, Rodrigo Vivi wrote:
> WA to disable replay buffer destination buffer arbitration optimization.
>
> Same Wa on previous platforms has a different name: WaToEnableHwFixForPushConstHWBug
>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
> ---
>   drivers/gpu/drm/i915/intel_engine_cs.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index c520a41..bc14f0b 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -1072,6 +1072,10 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
>   	struct drm_i915_private *dev_priv = engine->i915;
>   	int ret;
>   
> +	/* WaDisableReplayBufferBankArbitrationOptimization:cnl */
> +	WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
> +			  GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
> +

This should be from B0 onwards. For A0, there is a 3D workaround 
(WaInsertDummyPushConstPs)

>   	/* WaInPlaceDecompressionHang:cnl */
>   	WA_SET_BIT(GEN9_GAMT_ECO_REG_RW_IA,
>   		   GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);