Re: [PATCH 22/62] drm/i915/bdw: Implement Full Force Miss disables

[Imre Deak <imre.deak@intel.com>]

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On Sat, 2013-11-02 at 21:07 -0700, Ben Widawsky wrote:
> Implements WaVSRefCountFullforceMissDisable
> Implements WaDSRefCountFullforceMissDisable
> 
> v2: Rebased on the HSW patch (which fixed the bug from v1)
> commit 41c0b3a88c7bae96d8e2ee60c7ed91f57fd152d7
> Author: Ben Widawsky <ben@bwidawsk.net>
> Date:   Sat Jan 26 11:52:00 2013 -0800
> 
>     drm/i915: Implement WaVSRefCountFullforceMissDisable
> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
> ---
>  drivers/gpu/drm/i915/i915_reg.h | 1 +
>  drivers/gpu/drm/i915/intel_pm.c | 4 ++++
>  2 files changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 9929750..68b877d 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -990,6 +990,7 @@
>  
>  #define GEN7_FF_THREAD_MODE		0x20a0
>  #define   GEN7_FF_SCHED_MASK		0x0077070
> +#define   GEN7_FF_DS_REF_CNT_FFME	(1 << 19)
>  #define   GEN7_FF_TS_SCHED_HS1		(0x5<<16)
>  #define   GEN7_FF_TS_SCHED_HS0		(0x3<<16)
>  #define   GEN7_FF_TS_SCHED_LOAD_BALANCE	(0x1<<16)
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index abc51ea..81ec2c3 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5147,6 +5147,10 @@ static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
>  	if (IS_HASWELL(dev_priv->dev))
>  		reg &= ~GEN7_FF_VS_REF_CNT_FFME;
>  
> +	/* WaVSRefCountFullforceMissDisable|WaDSRefCountFullforceMissDisable */
> +	if (IS_GEN8(dev_priv->dev))
> +		reg &= ~(GEN7_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME);
> +
>  	I915_WRITE(GEN7_FF_THREAD_MODE, reg);
>  }

gen7_setup_fixed_func_scheduler() isn't called for GEN8.

--Imre


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