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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Cadence Design Systems Inc.
*/
#ifndef __PHY_DP_H_
#define __PHY_DP_H_
#include <linux/types.h>
/**
* struct phy_configure_opts_dp - DisplayPort PHY configuration set
*
* This structure is used to represent the configuration state of a
* DisplayPort phy.
*/
struct phy_configure_opts_dp {
/**
* @link_rate:
*
* Link Rate, in Mb/s, of the main link.
*
* Allowed values: 1620, 2160, 2430, 2700, 3240, 4320, 5400, 8100 Mb/s
*/
unsigned int link_rate;
/**
* @lanes:
*
* Number of active, consecutive, data lanes, starting from
* lane 0, used for the transmissions on main link.
*
* Allowed values: 1, 2, 4
*/
unsigned int lanes;
/**
* @voltage:
*
* Voltage swing levels, as specified by DisplayPort specification,
* to be used by particular lanes. One value per lane.
* voltage[0] is for lane 0, voltage[1] is for lane 1, etc.
*
* Maximum value: 3
*/
unsigned int voltage[4];
/**
* @pre:
*
* Pre-emphasis levels, as specified by DisplayPort specification, to be
* used by particular lanes. One value per lane.
*
* Maximum value: 3
*/
unsigned int pre[4];
/**
* @ssc:
*
* Flag indicating, whether or not to enable spread-spectrum clocking.
*
*/
u8 ssc : 1;
/**
* @set_rate:
*
* Flag indicating, whether or not reconfigure link rate and SSC to
* requested values.
*
*/
u8 set_rate : 1;
/**
* @set_lanes:
*
* Flag indicating, whether or not reconfigure lane count to
* requested value.
*
*/
u8 set_lanes : 1;
/**
* @set_voltages:
*
* Flag indicating, whether or not reconfigure voltage swing
* and pre-emphasis to requested values. Only lanes specified
* by "lanes" parameter will be affected.
*
*/
u8 set_voltages : 1;
};
#endif /* __PHY_DP_H_ */