/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Cadence Design Systems Inc.
*/
#ifndef __PHY_MIPI_DPHY_H_
#define __PHY_MIPI_DPHY_H_
/**
* struct phy_configure_opts_mipi_dphy - MIPI D-PHY configuration set
*
* This structure is used to represent the configuration state of a
* MIPI D-PHY phy.
*/
struct phy_configure_opts_mipi_dphy {
/**
* @clk_miss:
*
* Timeout, in picoseconds, for receiver to detect absence of
* Clock transitions and disable the Clock Lane HS-RX.
*
* Maximum value: 60000 ps
*/
unsigned int clk_miss;
/**
* @clk_post:
*
* Time, in picoseconds, that the transmitter continues to
* send HS clock after the last associated Data Lane has
* transitioned to LP Mode. Interval is defined as the period
* from the end of @hs_trail to the beginning of @clk_trail.
*
* Minimum value: 60000 ps + 52 * @hs_clk_rate period in ps
*/
unsigned int clk_post;
/**
* @clk_pre:
*
* Time, in UI, that the HS clock shall be driven by
* the transmitter prior to any associated Data Lane beginning
* the transition from LP to HS mode.
*
* Minimum value: 8 UI
*/
unsigned int clk_pre;
/**
* @clk_prepare:
*
* Time, in picoseconds, that the transmitter drives the Clock
* Lane LP-00 Line state immediately before the HS-0 Line
* state starting the HS transmission.
*
* Minimum value: 38000 ps
* Maximum value: 95000 ps
*/
unsigned int clk_prepare;
/**
* @clk_settle:
*
* Time interval, in picoseconds, during which the HS receiver
* should ignore any Clock Lane HS transitions, starting from
* the beginning of @clk_prepare.
*
* Minimum value: 95000 ps
* Maximum value: 300000 ps
*/
unsigned int clk_settle;
/**
* @clk_term_en:
*
* Time, in picoseconds, for the Clock Lane receiver to enable
* the HS line termination.
*
* Maximum value: 38000 ps
*/
unsigned int clk_term_en;
/**
* @clk_trail:
*
* Time, in picoseconds, that the transmitter drives the HS-0
* state after the last payload clock bit of a HS transmission
* burst.
*
* Minimum value: 60000 ps
*/
unsigned int clk_trail;
/**
* @clk_zero:
*
* Time, in picoseconds, that the transmitter drives the HS-0
* state prior to starting the Clock.
*/
unsigned int clk_zero;
/**
* @d_term_en:
*
* Time, in picoseconds, for the Data Lane receiver to enable
* the HS line termination.
*
* Maximum value: 35000 ps + 4 * @hs_clk_rate period in ps
*/
unsigned int d_term_en;
/**
* @eot:
*
* Transmitted time interval, in picoseconds, from the start
* of @hs_trail or @clk_trail, to the start of the LP- 11
* state following a HS burst.
*
* Maximum value: 105000 ps + 12 * @hs_clk_rate period in ps
*/
unsigned int eot;
/**
* @hs_exit:
*
* Time, in picoseconds, that the transmitter drives LP-11
* following a HS burst.
*
* Minimum value: 100000 ps
*/
unsigned int hs_exit;
/**
* @hs_prepare:
*
* Time, in picoseconds, that the transmitter drives the Data
* Lane LP-00 Line state immediately before the HS-0 Line
* state starting the HS transmission.
*
* Minimum value: 40000 ps + 4 * @hs_clk_rate period in ps
* Maximum value: 85000 ps + 6 * @hs_clk_rate period in ps
*/
unsigned int hs_prepare;
/**
* @hs_settle:
*
* Time interval, in picoseconds, during which the HS receiver
* shall ignore any Data Lane HS transitions, starting from
* the beginning of @hs_prepare.
*
* Minimum value: 85000 ps + 6 * @hs_clk_rate period in ps
* Maximum value: 145000 ps + 10 * @hs_clk_rate period in ps
*/
unsigned int hs_settle;
/**
* @hs_skip:
*
* Time interval, in picoseconds, during which the HS-RX
* should ignore any transitions on the Data Lane, following a
* HS burst. The end point of the interval is defined as the
* beginning of the LP-11 state following the HS burst.
*
* Minimum value: 40000 ps
* Maximum value: 55000 ps + 4 * @hs_clk_rate period in ps
*/
unsigned int hs_skip;
/**
* @hs_trail:
*
* Time, in picoseconds, that the transmitter drives the
* flipped differential state after last payload data bit of a
* HS transmission burst
*
* Minimum value: max(8 * @hs_clk_rate period in ps,
* 60000 ps + 4 * @hs_clk_rate period in ps)
*/
unsigned int hs_trail;
/**
* @hs_zero:
*
* Time, in picoseconds, that the transmitter drives the HS-0
* state prior to transmitting the Sync sequence.
*/
unsigned int hs_zero;
/**
* @init:
*
* Time, in microseconds for the initialization period to
* complete.
*
* Minimum value: 100 us
*/
unsigned int init;
/**
* @lpx:
*
* Transmitted length, in picoseconds, of any Low-Power state
* period.
*
* Minimum value: 50000 ps
*/
unsigned int lpx;
/**
* @ta_get:
*
* Time, in picoseconds, that the new transmitter drives the
* Bridge state (LP-00) after accepting control during a Link
* Turnaround.
*
* Value: 5 * @lpx
*/
unsigned int ta_get;
/**
* @ta_go:
*
* Time, in picoseconds, that the transmitter drives the
* Bridge state (LP-00) before releasing control during a Link
* Turnaround.
*
* Value: 4 * @lpx
*/
unsigned int ta_go;
/**
* @ta_sure:
*
* Time, in picoseconds, that the new transmitter waits after
* the LP-10 state before transmitting the Bridge state
* (LP-00) during a Link Turnaround.
*
* Minimum value: @lpx
* Maximum value: 2 * @lpx
*/
unsigned int ta_sure;
/**
* @wakeup:
*
* Time, in microseconds, that a transmitter drives a Mark-1
* state prior to a Stop state in order to initiate an exit
* from ULPS.
*
* Minimum value: 1000 us
*/
unsigned int wakeup;
/**
* @hs_clk_rate:
*
* Clock rate, in Hertz, of the high-speed clock.
*/
unsigned long hs_clk_rate;
/**
* @lp_clk_rate:
*
* Clock rate, in Hertz, of the low-power clock.
*/
unsigned long lp_clk_rate;
/**
* @lanes:
*
* Number of active, consecutive, data lanes, starting from
* lane 0, used for the transmissions.
*/
unsigned char lanes;
};
int phy_mipi_dphy_get_default_config(unsigned long pixel_clock,
unsigned int bpp,
unsigned int lanes,
struct phy_configure_opts_mipi_dphy *cfg);
int phy_mipi_dphy_get_default_config_for_hsclk(unsigned long long hs_clk_rate,
unsigned int lanes,
struct phy_configure_opts_mipi_dphy *cfg);
int phy_mipi_dphy_config_validate(struct phy_configure_opts_mipi_dphy *cfg);
#endif /* __PHY_MIPI_DPHY_H_ */