1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. 4 */ 5 6 #ifndef _DP_PARSER_H_ 7 #define _DP_PARSER_H_ 8 9 #include <linux/platform_device.h> 10 #include <linux/phy/phy.h> 11 #include <linux/phy/phy-dp.h> 12 13 #include "msm_drv.h" 14 15 #define DP_LABEL "MDSS DP DISPLAY" 16 #define DP_MAX_PIXEL_CLK_KHZ 675000 17 #define DP_MAX_NUM_DP_LANES 4 18 #define DP_LINK_RATE_HBR2 540000 /* kbytes */ 19 20 enum dp_pm_type { 21 DP_CORE_PM, 22 DP_CTRL_PM, 23 DP_STREAM_PM, 24 DP_PHY_PM, 25 DP_MAX_PM 26 }; 27 28 struct dss_io_region { 29 size_t len; 30 void __iomem *base; 31 }; 32 33 struct dss_io_data { 34 struct dss_io_region ahb; 35 struct dss_io_region aux; 36 struct dss_io_region link; 37 struct dss_io_region p0; 38 }; 39 40 static inline const char *dp_parser_pm_name(enum dp_pm_type module) 41 { 42 switch (module) { 43 case DP_CORE_PM: return "DP_CORE_PM"; 44 case DP_CTRL_PM: return "DP_CTRL_PM"; 45 case DP_STREAM_PM: return "DP_STREAM_PM"; 46 case DP_PHY_PM: return "DP_PHY_PM"; 47 default: return "???"; 48 } 49 } 50 51 /** 52 * struct dp_display_data - display related device tree data. 53 * 54 * @ctrl_node: referece to controller device 55 * @phy_node: reference to phy device 56 * @is_active: is the controller currently active 57 * @name: name of the display 58 * @display_type: type of the display 59 */ 60 struct dp_display_data { 61 struct device_node *ctrl_node; 62 struct device_node *phy_node; 63 bool is_active; 64 const char *name; 65 const char *display_type; 66 }; 67 68 /** 69 * struct dp_ctrl_resource - controller's IO related data 70 * 71 * @dp_controller: Display Port controller mapped memory address 72 * @phy_io: phy's mapped memory address 73 */ 74 struct dp_io { 75 struct dss_io_data dp_controller; 76 struct phy *phy; 77 union phy_configure_opts phy_opts; 78 }; 79 80 /** 81 * struct dp_pinctrl - DP's pin control 82 * 83 * @pin: pin-controller's instance 84 * @state_active: active state pin control 85 * @state_hpd_active: hpd active state pin control 86 * @state_suspend: suspend state pin control 87 */ 88 struct dp_pinctrl { 89 struct pinctrl *pin; 90 struct pinctrl_state *state_active; 91 struct pinctrl_state *state_hpd_active; 92 struct pinctrl_state *state_suspend; 93 }; 94 95 /* Regulators for DP devices */ 96 struct dp_reg_entry { 97 char name[32]; 98 int enable_load; 99 int disable_load; 100 }; 101 102 struct dss_module_power { 103 unsigned int num_clk; 104 struct clk_bulk_data *clocks; 105 }; 106 107 /** 108 * struct dp_parser - DP parser's data exposed to clients 109 * 110 * @pdev: platform data of the client 111 * @mp: gpio, regulator and clock related data 112 * @pinctrl: pin-control related data 113 * @disp_data: controller's display related data 114 * @parse: function to be called by client to parse device tree. 115 */ 116 struct dp_parser { 117 struct platform_device *pdev; 118 struct dss_module_power mp[DP_MAX_PM]; 119 struct dp_pinctrl pinctrl; 120 struct dp_io io; 121 struct dp_display_data disp_data; 122 u32 max_dp_lanes; 123 u32 max_dp_link_rate; 124 struct drm_bridge *next_bridge; 125 126 int (*parse)(struct dp_parser *parser); 127 }; 128 129 /** 130 * dp_parser_get() - get the DP's device tree parser module 131 * 132 * @pdev: platform data of the client 133 * return: pointer to dp_parser structure. 134 * 135 * This function provides client capability to parse the 136 * device tree and populate the data structures. The data 137 * related to clock, regulators, pin-control and other 138 * can be parsed using this module. 139 */ 140 struct dp_parser *dp_parser_get(struct platform_device *pdev); 141 142 /** 143 * devm_dp_parser_find_next_bridge() - find an additional bridge to DP 144 * 145 * @dev: device to tie bridge lifetime to 146 * @parser: dp_parser data from client 147 * 148 * This function is used to find any additional bridge attached to 149 * the DP controller. The eDP interface requires a panel bridge. 150 * 151 * Return: 0 if able to get the bridge, otherwise negative errno for failure. 152 */ 153 int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser); 154 155 #endif 156