[Intel-gfx] [PATCH] Revert "drm/i915/chv: Set min freq to efficient frequency on chv"

[Chris Wilson]

On Fri, Aug 12, 2016 at 02:20:34PM +0530, deepak.s at linux.intel.com wrote:
> From: Deepak S <deepak.s at linux.intel.com>
> 
> With latest Punit FW, vgg input voltag drop falling to minimum is fixed.
> So reverting the WA patch & moving to turbo freq opreation range to [RPn -> RP0]
> 
> This reverts commit 5b7c91b78b1ce6663e0f1f037f6cb4d7c9537d44.
> 
> commit 5b7c91b78b1ce6663e0f1f037f6cb4d7c9537d44
> Author: Deepak S <deepak.s at linux.intel.com>
> Date:   Sat May 9 18:15:46 2015 +0530
> 
>     drm/i915/chv: Set min freq to efficient frequency on chv
> 
> Signed-off-by: Deepak S <deepak.s at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 21 +++++++++++++++++++--
>  1 file changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 81ab119..e59799a 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5579,6 +5579,24 @@ static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
>  	return rp1;
>  }
>  
> +static int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)

Return int, but compute a u32? Just inconsistent.

> +{
> +	struct drm_device *dev = &dev_priv->drm;

struct pci_device *pdev = dev_priv->drm.pdev;

> +	u32 val, rpn;
> +
> +	if (dev->pdev->revision >= 0x20) {
> +		val = vlv_punit_read(dev_priv, FB_GFX_FMIN_AT_VMIN_FUSE);
> +		rpn = ((val >> FB_GFX_FMIN_AT_VMIN_FUSE_SHIFT) &
> +		       FB_GFX_FREQ_FUSE_MASK);
> +	} else { /* For pre-production hardware */

	} else { /* For pre-production hardware use RPe instead */

> +		val = vlv_punit_read(dev_priv, PUNIT_GPU_STATUS_REG);
> +		rpn = ((val >> PUNIT_GPU_STATIS_GFX_MIN_FREQ_SHIFT) &
> +		       PUNIT_GPU_STATUS_GFX_MIN_FREQ_MASK);
> +	}

Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre