Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> writes:
> WA to enable HW L1 Banking fix that allows aniso to operate
> at full sample rate.
>
References: HSD#1937670
> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx>
> Cc: Ben Widawsky <ben@xxxxxxxxxxxx>
> Cc: Anuj Phogat <anuj.phogat@xxxxxxxxx>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_engine_cs.c | 3 +++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index e2908ae34004..1ad22a824921 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -8072,6 +8072,7 @@ enum {
> #define HSW_SAMPLE_C_PERFORMANCE (1<<9)
> #define GEN8_CENTROID_PIXEL_OPT_DIS (1<<8)
> #define GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC (1<<5)
> +#define CNL_FAST_ANISO_L1_BANKING_FIX (1<<4)
> #define GEN8_SAMPLER_POWER_BYPASS_DIS (1<<1)
>
> #define GEN9_HALF_SLICE_CHICKEN7 _MMIO(0xe194)
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index a6ac9d0a4156..4b9b7828802d 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -1090,6 +1090,9 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
> /* WaPushConstantDereferenceHoldDisable:cnl */
> WA_SET_BIT(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
>
> + /* FtrEnableFastAnisoL1BankingFix: cnl */
> + WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX);
> +
> /* WaEnablePreemptionGranularityControlByUMD:cnl */
> ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
> if (ret)
> --
> 2.13.2
>
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