[Intel-gfx] [PATCH 13/15] drm/i915/glk: Allow dotclock up to 2 * cdclk on geminilake

[Rodrigo Vivi]

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

On Thu, Nov 10, 2016 at 05:23:18PM +0200, Ander Conselvan de Oliveira wrote:
> Geminilake has double wide pipes so it can output two pixels per CD
> clock.
> 
> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 62cc390..7763c44 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -5830,8 +5830,10 @@ static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
>  {
>  	int max_cdclk_freq = dev_priv->max_cdclk_freq;
>  
> -	if (INTEL_INFO(dev_priv)->gen >= 9 ||
> -	    IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> +	if (IS_GEMINILAKE(dev_priv))
> +		return 2 * max_cdclk_freq;
> +	else if (INTEL_INFO(dev_priv)->gen >= 9 ||
> +		 IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
>  		return max_cdclk_freq;
>  	else if (IS_CHERRYVIEW(dev_priv))
>  		return max_cdclk_freq*95/100;
> @@ -6588,9 +6590,9 @@ static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv,
>  
>  static int glk_calc_cdclk(int max_pixclk)
>  {
> -	if (max_pixclk > 158400)
> +	if (max_pixclk > 2 * 158400)
>  		return 316800;
> -	else if (max_pixclk > 79200)
> +	else if (max_pixclk > 2 * 79200)
>  		return 158400;
>  	else
>  		return 79200;
> -- 
> 2.5.5
> 
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