/* 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>
#define PHY_SUBMODE_DP 0
#define PHY_SUBMODE_EDP 1
/**
* 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_ */
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