[Intel-gfx] [PATCH v3] drm/i915/glk: Apply WaProgramL3SqcReg1DefaultForPerf for GLK too

[Rodrigo Vivi]

On Mon, Nov 27, 2017 at 08:16:15AM +0000, Valtteri Rantala wrote:
> Testing the texture read performance shows that the same tuning for
> the SQ credits is needed on GLK as on BXT/APL. This has been also
> confirmed by Altug from the HW team.
> 
> V3: Rebase + fix
> Signed-off-by: Valtteri Rantala <valtteri.rantala at intel.com>

It also matches wa_database, so:

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_engine_cs.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
> index fede62d..a9c1053 100644
> --- a/drivers/gpu/drm/i915/intel_engine_cs.c
> +++ b/drivers/gpu/drm/i915/intel_engine_cs.c
> @@ -1067,6 +1067,15 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine)
>  	/* WaDisableSTUnitPowerOptimization:skl,bxt,kbl,glk,cfl */
>  	WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE);
>  
> +	/* WaProgramL3SqcReg1DefaultForPerf:bxt,glk */
> +	if (IS_GEN9_LP(dev_priv)) {
> +		u32 val = I915_READ(GEN8_L3SQCREG1);
> +
> +		val &= ~L3_PRIO_CREDITS_MASK;
> +		val |= L3_GENERAL_PRIO_CREDITS(62) | L3_HIGH_PRIO_CREDITS(2);
> +		I915_WRITE(GEN8_L3SQCREG1, val);
> +	}
> +
>  	/* WaOCLCoherentLineFlush:skl,bxt,kbl,cfl */
>  	I915_WRITE(GEN8_L3SQCREG4, (I915_READ(GEN8_L3SQCREG4) |
>  				    GEN8_LQSC_FLUSH_COHERENT_LINES));
> @@ -1199,12 +1208,6 @@ static int bxt_init_workarounds(struct intel_engine_cs *engine)
>  	I915_WRITE(FF_SLICE_CS_CHICKEN2,
>  		   _MASKED_BIT_ENABLE(GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE));
>  
> -	/* WaProgramL3SqcReg1DefaultForPerf:bxt */
> -	val = I915_READ(GEN8_L3SQCREG1);
> -	val &= ~L3_PRIO_CREDITS_MASK;
> -	val |= L3_GENERAL_PRIO_CREDITS(62) | L3_HIGH_PRIO_CREDITS(2);
> -	I915_WRITE(GEN8_L3SQCREG1, val);
> -
>  	/* WaToEnableHwFixForPushConstHWBug:bxt */
>  	WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
>  			  GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
> -- 
> 2.7.4
> 
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