Commit 10ebb736 authored by Jani Nikula's avatar Jani Nikula
Browse files

drm/i915/dp: abstract rate array length limiting 



This will be useful later on. Also move the functions around to not need
forward declarations in subsequent patches. No functional changes.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/40f37f08cad33234cd86337d39e823ac6e55805f.1517482774.git.jani.nikula@intel.com
parent 006bb4cc

drivers/gpu/drm/i915/intel_dp.c

+22 −16
Original line number Diff line number Diff line
@@ -155,6 +155,28 @@ static void intel_dp_set_sink_rates(struct intel_dp *intel_dp) 
	intel_dp->num_sink_rates = i;

}



/* Get length of rates array potentially limited by max_rate. */

static int intel_dp_rate_limit_len(const int *rates, int len, int max_rate)

{

	int i;



	/* Limit results by potentially reduced max rate */

	for (i = 0; i < len; i++) {

		if (rates[len - i - 1] <= max_rate)

			return len - i;

	}



	return 0;

}



/* Get length of common rates array potentially limited by max_rate. */

static int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,

					  int max_rate)

{

	return intel_dp_rate_limit_len(intel_dp->common_rates,

				       intel_dp->num_common_rates, max_rate);

}



/* Theoretical max between source and sink */

static int intel_dp_max_common_rate(struct intel_dp *intel_dp)

{
@@ -326,22 +348,6 @@ static void intel_dp_set_common_rates(struct intel_dp *intel_dp) 
	}

}



/* get length of common rates potentially limited by max_rate */

static int intel_dp_common_len_rate_limit(struct intel_dp *intel_dp,

					  int max_rate)

{

	const int *common_rates = intel_dp->common_rates;

	int i, common_len = intel_dp->num_common_rates;



	/* Limit results by potentially reduced max rate */

	for (i = 0; i < common_len; i++) {

		if (common_rates[common_len - i - 1] <= max_rate)

			return common_len - i;

	}



	return 0;

}



static bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,

				       uint8_t lane_count)

{

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