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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
*/
#ifndef _DP_PARSER_H_
#define _DP_PARSER_H_
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/phy/phy-dp.h>
#include "msm_drv.h"
#define DP_LABEL "MDSS DP DISPLAY"
#define DP_MAX_PIXEL_CLK_KHZ 675000
#define DP_MAX_NUM_DP_LANES 4
#define DP_LINK_RATE_HBR2 540000 /* kbytes */
enum dp_pm_type {
DP_CORE_PM,
DP_CTRL_PM,
DP_STREAM_PM,
DP_PHY_PM,
DP_MAX_PM
};
struct dss_io_region {
size_t len;
void __iomem *base;
};
struct dss_io_data {
struct dss_io_region ahb;
struct dss_io_region aux;
struct dss_io_region link;
struct dss_io_region p0;
};
static inline const char *dp_parser_pm_name(enum dp_pm_type module)
{
switch (module) {
case DP_CORE_PM: return "DP_CORE_PM";
case DP_CTRL_PM: return "DP_CTRL_PM";
case DP_STREAM_PM: return "DP_STREAM_PM";
case DP_PHY_PM: return "DP_PHY_PM";
default: return "???";
}
}
/**
* struct dp_display_data - display related device tree data.
*
* @ctrl_node: referece to controller device
* @phy_node: reference to phy device
* @is_active: is the controller currently active
* @name: name of the display
* @display_type: type of the display
*/
struct dp_display_data {
struct device_node *ctrl_node;
struct device_node *phy_node;
bool is_active;
const char *name;
const char *display_type;
};
/**
* struct dp_ctrl_resource - controller's IO related data
*
* @dp_controller: Display Port controller mapped memory address
* @phy_io: phy's mapped memory address
*/
struct dp_io {
struct dss_io_data dp_controller;
struct phy *phy;
union phy_configure_opts phy_opts;
};
/**
* struct dp_pinctrl - DP's pin control
*
* @pin: pin-controller's instance
* @state_active: active state pin control
* @state_hpd_active: hpd active state pin control
* @state_suspend: suspend state pin control
*/
struct dp_pinctrl {
struct pinctrl *pin;
struct pinctrl_state *state_active;
struct pinctrl_state *state_hpd_active;
struct pinctrl_state *state_suspend;
};
/* Regulators for DP devices */
struct dp_reg_entry {
char name[32];
int enable_load;
int disable_load;
};
struct dss_module_power {
unsigned int num_clk;
struct clk_bulk_data *clocks;
};
/**
* struct dp_parser - DP parser's data exposed to clients
*
* @pdev: platform data of the client
* @mp: gpio, regulator and clock related data
* @pinctrl: pin-control related data
* @disp_data: controller's display related data
* @parse: function to be called by client to parse device tree.
*/
struct dp_parser {
struct platform_device *pdev;
struct dss_module_power mp[DP_MAX_PM];
struct dp_pinctrl pinctrl;
struct dp_io io;
struct dp_display_data disp_data;
u32 max_dp_lanes;
u32 max_dp_link_rate;
struct drm_bridge *next_bridge;
int (*parse)(struct dp_parser *parser);
};
/**
* dp_parser_get() - get the DP's device tree parser module
*
* @pdev: platform data of the client
* return: pointer to dp_parser structure.
*
* This function provides client capability to parse the
* device tree and populate the data structures. The data
* related to clock, regulators, pin-control and other
* can be parsed using this module.
*/
struct dp_parser *dp_parser_get(struct platform_device *pdev);
/**
* devm_dp_parser_find_next_bridge() - find an additional bridge to DP
*
* @dev: device to tie bridge lifetime to
* @parser: dp_parser data from client
*
* This function is used to find any additional bridge attached to
* the DP controller. The eDP interface requires a panel bridge.
*
* Return: 0 if able to get the bridge, otherwise negative errno for failure.
*/
int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser);
#endif
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