[Intel-gfx] [PATCH 1/7] drm/i915: Read guaranteed freq for valleyview

[Mika Kuoppala]

deepak.s at linux.intel.com writes:

> From: Deepak S <deepak.s at linux.intel.com>
>
> Reading RP1 for valleyview to help us enable "pm_rps" i-g-t testcase
> execution.
>
> Signed-off-by: Deepak S <deepak.s at linux.intel.com>

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

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index d1af641..b8e7afc 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3816,6 +3816,17 @@ int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
>  	return rpn;
>  }
>  
> +int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv)
> +{
> +	u32 val, rp1;
> +
> +	val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
> +
> +	rp1 = (val & FB_GFX_FGUARANTEED_FREQ_FUSE_MASK) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT;
> +
> +	return rp1;
> +}
> +
>  int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
>  {
>  	u32 val, rp0;
> @@ -3958,6 +3969,11 @@ static void valleyview_init_gt_powersave(struct drm_device *dev)
>  			 vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
>  			 dev_priv->rps.efficient_freq);
>  
> +	dev_priv->rps.rp1_freq = valleyview_rps_guar_freq(dev_priv);
> +	DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
> +			 dev_priv->rps.rp1_freq);
> +
>  	dev_priv->rps.min_freq = valleyview_rps_min_freq(dev_priv);
>  	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
>  			 vlv_gpu_freq(dev_priv, dev_priv->rps.min_freq),
> -- 
> 1.9.1
>
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