[Intel-gfx] [PATCH v2 1/3] drm/i915: CHV GPU frequency to opcode functions

[Mika Kuoppala]

deepak.s at linux.intel.com writes:

> From: Deepak S <deepak.s at linux.intel.com>
>
> Adding chv specific fre/encode conversion.
>
> v2: Remove generic function and platform check (Daniel)
>
> 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 | 78 +++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 76 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 6892421..f673e1b 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -6931,7 +6931,7 @@ int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
>  	return 0;
>  }
>  
> -int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
> +int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
>  {
>  	int div;
>  
> @@ -6953,7 +6953,7 @@ int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
>  	return DIV_ROUND_CLOSEST(dev_priv->mem_freq * (val + 6 - 0xbd), 4 * div);
>  }
>  
> -int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
> +int byt_freq_opcode(struct drm_i915_private *dev_priv, int val)
>  {
>  	int mul;
>  
> @@ -6975,6 +6975,80 @@ int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
>  	return DIV_ROUND_CLOSEST(4 * mul * val, dev_priv->mem_freq) + 0xbd - 6;
>  }
>  
> +int chv_gpu_freq(struct drm_i915_private *dev_priv, int val)
> +{
> +	int div, freq;
> +
> +	switch (dev_priv->rps.cz_freq) {
> +	case 200:
> +		div = 5;
> +		break;
> +	case 267:
> +		div = 6;
> +		break;
> +	case 320:
> +	case 333:
> +	case 400:
> +		div = 8;
> +		break;
> +	default:
> +		return -1;
> +	}
> +
> +	freq = (DIV_ROUND_CLOSEST((dev_priv->rps.cz_freq * val), 2 * div) / 2);
> +
> +	return freq;
> +}
> +
> +int chv_freq_opcode(struct drm_i915_private *dev_priv, int val)
> +{
> +	int mul, opcode;
> +
> +	switch (dev_priv->rps.cz_freq) {
> +	case 200:
> +		mul = 5;
> +		break;
> +	case 267:
> +		mul = 6;
> +		break;
> +	case 320:
> +	case 333:
> +	case 400:
> +		mul = 8;
> +		break;
> +	default:
> +		return -1;
> +	}
> +
> +	opcode = (DIV_ROUND_CLOSEST((val * 2 * mul), dev_priv->rps.cz_freq) * 2);
> +
> +	return opcode;
> +}
> +
> +int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
> +{
> +	int ret = -1;
> +
> +	if (IS_CHERRYVIEW(dev_priv->dev))
> +		ret = chv_gpu_freq(dev_priv, val);
> +	else if (IS_VALLEYVIEW(dev_priv->dev))
> +		ret = byt_gpu_freq(dev_priv, val);
> +
> +	return ret;
> +}
> +
> +int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
> +{
> +	int ret = -1;
> +
> +	if (IS_CHERRYVIEW(dev_priv->dev))
> +		ret = chv_freq_opcode(dev_priv, val);
> +	else if (IS_VALLEYVIEW(dev_priv->dev))
> +		ret = byt_freq_opcode(dev_priv, val);
> +
> +	return ret;
> +}
> +
>  void intel_pm_setup(struct drm_device *dev)
>  {
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> -- 
> 1.9.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx