include/linux/phy/phy-dp.h

root/include/linux/phy/phy-dp.h
/* 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_ */
Linux
