1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
9 #include <linux/platform_device.h>
10 #include <linux/phy/phy.h>
11 #include <linux/phy/phy-dp.h>
15 #define DP_LABEL "MDSS DP DISPLAY"
16 #define DP_MAX_PIXEL_CLK_KHZ 675000
17 #define DP_MAX_NUM_DP_LANES 4
27 struct dss_io_region {
33 struct dss_io_region ahb;
34 struct dss_io_region aux;
35 struct dss_io_region link;
36 struct dss_io_region p0;
39 static inline const char *dp_parser_pm_name(enum dp_pm_type module)
42 case DP_CORE_PM: return "DP_CORE_PM";
43 case DP_CTRL_PM: return "DP_CTRL_PM";
44 case DP_STREAM_PM: return "DP_STREAM_PM";
45 case DP_PHY_PM: return "DP_PHY_PM";
46 default: return "???";
51 * struct dp_display_data - display related device tree data.
53 * @ctrl_node: referece to controller device
54 * @phy_node: reference to phy device
55 * @is_active: is the controller currently active
56 * @name: name of the display
57 * @display_type: type of the display
59 struct dp_display_data {
60 struct device_node *ctrl_node;
61 struct device_node *phy_node;
64 const char *display_type;
68 * struct dp_ctrl_resource - controller's IO related data
70 * @dp_controller: Display Port controller mapped memory address
71 * @phy_io: phy's mapped memory address
74 struct dss_io_data dp_controller;
76 union phy_configure_opts phy_opts;
80 * struct dp_pinctrl - DP's pin control
82 * @pin: pin-controller's instance
83 * @state_active: active state pin control
84 * @state_hpd_active: hpd active state pin control
85 * @state_suspend: suspend state pin control
89 struct pinctrl_state *state_active;
90 struct pinctrl_state *state_hpd_active;
91 struct pinctrl_state *state_suspend;
94 /* Regulators for DP devices */
101 struct dss_module_power {
102 unsigned int num_clk;
103 struct clk_bulk_data *clocks;
107 * struct dp_parser - DP parser's data exposed to clients
109 * @pdev: platform data of the client
110 * @mp: gpio, regulator and clock related data
111 * @pinctrl: pin-control related data
112 * @disp_data: controller's display related data
113 * @parse: function to be called by client to parse device tree.
116 struct platform_device *pdev;
117 struct dss_module_power mp[DP_MAX_PM];
118 struct dp_pinctrl pinctrl;
120 struct dp_display_data disp_data;
122 struct drm_bridge *next_bridge;
124 int (*parse)(struct dp_parser *parser);
128 * dp_parser_get() - get the DP's device tree parser module
130 * @pdev: platform data of the client
131 * return: pointer to dp_parser structure.
133 * This function provides client capability to parse the
134 * device tree and populate the data structures. The data
135 * related to clock, regulators, pin-control and other
136 * can be parsed using this module.
138 struct dp_parser *dp_parser_get(struct platform_device *pdev);
141 * devm_dp_parser_find_next_bridge() - find an additional bridge to DP
143 * @dev: device to tie bridge lifetime to
144 * @parser: dp_parser data from client
146 * This function is used to find any additional bridge attached to
147 * the DP controller. The eDP interface requires a panel bridge.
149 * Return: 0 if able to get the bridge, otherwise negative errno for failure.
151 int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser);