Re: [PATCH v6 3/8] drm/i915: Unify ilk and hsw .get_aux_clock_divider

[Jani Nikula <jani.nikula@linux.intel.com>]

On Wed, 03 Jun 2015, Mika Kahola <mika.kahola@intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> ilk_get_aux_clock_divider() is now a subset of
> hsw_get_aux_clock_divider() so unify them.

I do like the clarity of having these two separate, especially with the
early return in the ilk version and the w/a in the hsw/bdw version.

Moreover there's the subtle round up vs. closest difference, and a
history of aux bugs...

I'm dropping this one, doesn't seem to affect later patches.

BR,
Jani.


>
> v2: Rebased to the latest
> v3: Rebased to the latest
> v4: Fix for patch style problems
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Mika Kahola <mika.kahola@intel.com>
>
> Author:    Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 23 +++--------------------
>  1 file changed, 3 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 9a6517d..959f115 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -704,23 +704,6 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
>  	struct drm_device *dev = intel_dig_port->base.base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  
> -	if (index)
> -		return 0;
> -
> -	if (intel_dig_port->port == PORT_A) {
> -		return DIV_ROUND_UP(dev_priv->cdclk_freq, 2000);
> -
> -	} else {
> -		return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
> -	}
> -}
> -
> -static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
> -{
> -	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
> -	struct drm_device *dev = intel_dig_port->base.base.dev;
> -	struct drm_i915_private *dev_priv = dev->dev_private;
> -
>  	if (intel_dig_port->port == PORT_A) {
>  		if (index)
>  			return 0;
> @@ -733,7 +716,9 @@ static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
>  		default: return 0;
>  		}
>  	} else  {
> -		return index ? 0 : DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
> +		if (index)
> +			return 0;
> +		return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
>  	}
>  }
>  
> @@ -5746,8 +5731,6 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
>  		intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
>  	else if (IS_VALLEYVIEW(dev))
>  		intel_dp->get_aux_clock_divider = vlv_get_aux_clock_divider;
> -	else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
> -		intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
>  	else if (HAS_PCH_SPLIT(dev))
>  		intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
>  	else
> -- 
> 1.9.1
>
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-- 
Jani Nikula, Intel Open Source Technology Center
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