Re: [PATCH 4/7] drm/i915: Change the placement of some static functions in intel_dp.c

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

On Thu, 27 Oct 2016, Manasi Navare <manasi.d.navare@intel.com> wrote:
> From: "Navare, Manasi D" <manasi.d.navare@intel.com>
>
> These static helper functions are required to be used during
> fallback link rate implemnetation so they need to be placed at the top
> of the file.
>
> v3:
> * Add cleanup to other patch (Mika Kahola)
> v2:
> * Dont move around functions declared in intel_drv.h (Rodrigo Vivi)
>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
> Reviewed-by: Mika Kahola <mika.kahola@intel.com>

Pushed this one so we don't have to keep carrying it around. Thanks for
the patch and review.

BR,
Jani.

> ---
>  drivers/gpu/drm/i915/intel_dp.c | 150 ++++++++++++++++++++--------------------
>  1 file changed, 75 insertions(+), 75 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 795897c..aecfd22 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -213,6 +213,81 @@ static u8 intel_dp_max_lane_count(struct intel_dp *intel_dp)
>  	return max_dotclk;
>  }
>  
> +static int
> +intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
> +{
> +	if (intel_dp->num_sink_rates) {
> +		*sink_rates = intel_dp->sink_rates;
> +		return intel_dp->num_sink_rates;
> +	}
> +
> +	*sink_rates = default_rates;
> +
> +	return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
> +}
> +
> +static int
> +intel_dp_source_rates(struct intel_dp *intel_dp, const int **source_rates)
> +{
> +	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> +	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
> +	int size;
> +
> +	if (IS_BROXTON(dev_priv)) {
> +		*source_rates = bxt_rates;
> +		size = ARRAY_SIZE(bxt_rates);
> +	} else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
> +		*source_rates = skl_rates;
> +		size = ARRAY_SIZE(skl_rates);
> +	} else {
> +		*source_rates = default_rates;
> +		size = ARRAY_SIZE(default_rates);
> +	}
> +
> +	/* This depends on the fact that 5.4 is last value in the array */
> +	if (!intel_dp_source_supports_hbr2(intel_dp))
> +		size--;
> +
> +	return size;
> +}
> +
> +static int intersect_rates(const int *source_rates, int source_len,
> +			   const int *sink_rates, int sink_len,
> +			   int *common_rates)
> +{
> +	int i = 0, j = 0, k = 0;
> +
> +	while (i < source_len && j < sink_len) {
> +		if (source_rates[i] == sink_rates[j]) {
> +			if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
> +				return k;
> +			common_rates[k] = source_rates[i];
> +			++k;
> +			++i;
> +			++j;
> +		} else if (source_rates[i] < sink_rates[j]) {
> +			++i;
> +		} else {
> +			++j;
> +		}
> +	}
> +	return k;
> +}
> +
> +static int intel_dp_common_rates(struct intel_dp *intel_dp,
> +				 int *common_rates)
> +{
> +	const int *source_rates, *sink_rates;
> +	int source_len, sink_len;
> +
> +	sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
> +	source_len = intel_dp_source_rates(intel_dp, &source_rates);
> +
> +	return intersect_rates(source_rates, source_len,
> +			       sink_rates, sink_len,
> +			       common_rates);
> +}
> +
>  static enum drm_mode_status
>  intel_dp_mode_valid(struct drm_connector *connector,
>  		    struct drm_display_mode *mode)
> @@ -1291,19 +1366,6 @@ static void intel_aux_reg_init(struct intel_dp *intel_dp)
>  	intel_dp->aux.transfer = intel_dp_aux_transfer;
>  }
>  
> -static int
> -intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
> -{
> -	if (intel_dp->num_sink_rates) {
> -		*sink_rates = intel_dp->sink_rates;
> -		return intel_dp->num_sink_rates;
> -	}
> -
> -	*sink_rates = default_rates;
> -
> -	return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
> -}
> -
>  bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
>  {
>  	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> @@ -1316,31 +1378,6 @@ bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
>  		return false;
>  }
>  
> -static int
> -intel_dp_source_rates(struct intel_dp *intel_dp, const int **source_rates)
> -{
> -	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> -	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
> -	int size;
> -
> -	if (IS_BROXTON(dev_priv)) {
> -		*source_rates = bxt_rates;
> -		size = ARRAY_SIZE(bxt_rates);
> -	} else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
> -		*source_rates = skl_rates;
> -		size = ARRAY_SIZE(skl_rates);
> -	} else {
> -		*source_rates = default_rates;
> -		size = ARRAY_SIZE(default_rates);
> -	}
> -
> -	/* This depends on the fact that 5.4 is last value in the array */
> -	if (!intel_dp_source_supports_hbr2(intel_dp))
> -		size--;
> -
> -	return size;
> -}
> -
>  static void
>  intel_dp_set_clock(struct intel_encoder *encoder,
>  		   struct intel_crtc_state *pipe_config)
> @@ -1375,43 +1412,6 @@ bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
>  	}
>  }
>  
> -static int intersect_rates(const int *source_rates, int source_len,
> -			   const int *sink_rates, int sink_len,
> -			   int *common_rates)
> -{
> -	int i = 0, j = 0, k = 0;
> -
> -	while (i < source_len && j < sink_len) {
> -		if (source_rates[i] == sink_rates[j]) {
> -			if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
> -				return k;
> -			common_rates[k] = source_rates[i];
> -			++k;
> -			++i;
> -			++j;
> -		} else if (source_rates[i] < sink_rates[j]) {
> -			++i;
> -		} else {
> -			++j;
> -		}
> -	}
> -	return k;
> -}
> -
> -static int intel_dp_common_rates(struct intel_dp *intel_dp,
> -				 int *common_rates)
> -{
> -	const int *source_rates, *sink_rates;
> -	int source_len, sink_len;
> -
> -	sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
> -	source_len = intel_dp_source_rates(intel_dp, &source_rates);
> -
> -	return intersect_rates(source_rates, source_len,
> -			       sink_rates, sink_len,
> -			       common_rates);
> -}
> -
>  static void snprintf_int_array(char *str, size_t len,
>  			       const int *array, int nelem)
>  {

-- 
Jani Nikula, Intel Open Source Technology Center
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