Re: [PATCH 4/4] drm/i915: Change CHV SKU400 GPU freq divider to 10

[Deepak S <deepak.s@intel.com>]

On Tuesday 11 November 2014 02:25 AM, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> According to "Cherryview_GFXclocks_y14w36d1.xlsx" the GPU frequency
> divider should be 10 in when the CZ clock is 400 MHz. Change the code
> to agree so that we report the correct frequencies.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>   drivers/gpu/drm/i915/intel_pm.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 0f5c391..b73506f 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -7292,8 +7292,9 @@ static int vlv_gpu_freq_div(unsigned int czclk_freq)
>   		return 12;
>   	case 320:
>   	case 333:
> -	case 400:
>   		return 16;
> +	case 400:
> +		return 20;
>   	default:
>   		return -1;
>   	}

right latest spec as div is 20

Reviewed-by: Deepak S <deepak.s@linux.intel.com>

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