xref: /openbmc/linux/drivers/gpu/drm/msm/dsi/dsi.h (revision 293d5b43)
1 /*
2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 and
6  * only version 2 as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
13 
14 #ifndef __DSI_CONNECTOR_H__
15 #define __DSI_CONNECTOR_H__
16 
17 #include <linux/of_platform.h>
18 #include <linux/platform_device.h>
19 
20 #include "drm_crtc.h"
21 #include "drm_mipi_dsi.h"
22 #include "drm_panel.h"
23 
24 #include "msm_drv.h"
25 
26 #define DSI_0	0
27 #define DSI_1	1
28 #define DSI_MAX	2
29 
30 enum msm_dsi_phy_type {
31 	MSM_DSI_PHY_28NM_HPM,
32 	MSM_DSI_PHY_28NM_LP,
33 	MSM_DSI_PHY_20NM,
34 	MSM_DSI_PHY_28NM_8960,
35 	MSM_DSI_PHY_MAX
36 };
37 
38 #define DSI_DEV_REGULATOR_MAX	8
39 #define DSI_BUS_CLK_MAX		4
40 
41 /* Regulators for DSI devices */
42 struct dsi_reg_entry {
43 	char name[32];
44 	int enable_load;
45 	int disable_load;
46 };
47 
48 struct dsi_reg_config {
49 	int num;
50 	struct dsi_reg_entry regs[DSI_DEV_REGULATOR_MAX];
51 };
52 
53 struct msm_dsi {
54 	struct drm_device *dev;
55 	struct platform_device *pdev;
56 
57 	/* connector managed by us when we're connected to a drm_panel */
58 	struct drm_connector *connector;
59 	/* internal dsi bridge attached to MDP interface */
60 	struct drm_bridge *bridge;
61 
62 	struct mipi_dsi_host *host;
63 	struct msm_dsi_phy *phy;
64 
65 	/*
66 	 * panel/external_bridge connected to dsi bridge output, only one of the
67 	 * two can be valid at a time
68 	 */
69 	struct drm_panel *panel;
70 	struct drm_bridge *external_bridge;
71 	unsigned long device_flags;
72 
73 	struct device *phy_dev;
74 	bool phy_enabled;
75 
76 	/* the encoders we are hooked to (outside of dsi block) */
77 	struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM];
78 
79 	int id;
80 };
81 
82 /* dsi manager */
83 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
84 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
85 struct drm_connector *msm_dsi_manager_connector_init(u8 id);
86 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
87 int msm_dsi_manager_phy_enable(int id,
88 		const unsigned long bit_rate, const unsigned long esc_rate,
89 		u32 *clk_pre, u32 *clk_post);
90 void msm_dsi_manager_phy_disable(int id);
91 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
92 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
93 int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
94 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
95 
96 /* msm dsi */
97 static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
98 {
99 	return msm_dsi->panel || msm_dsi->external_bridge;
100 }
101 
102 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
103 
104 /* dsi pll */
105 struct msm_dsi_pll;
106 #ifdef CONFIG_DRM_MSM_DSI_PLL
107 struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
108 			enum msm_dsi_phy_type type, int dsi_id);
109 void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
110 int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
111 	struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
112 void msm_dsi_pll_save_state(struct msm_dsi_pll *pll);
113 int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll);
114 #else
115 static inline struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
116 			 enum msm_dsi_phy_type type, int id) {
117 	return ERR_PTR(-ENODEV);
118 }
119 static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
120 {
121 }
122 static inline int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
123 	struct clk **byte_clk_provider, struct clk **pixel_clk_provider)
124 {
125 	return -ENODEV;
126 }
127 static inline void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
128 {
129 }
130 static inline int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll)
131 {
132 	return 0;
133 }
134 #endif
135 
136 /* dsi host */
137 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
138 					const struct mipi_dsi_msg *msg);
139 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
140 					const struct mipi_dsi_msg *msg);
141 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
142 					const struct mipi_dsi_msg *msg);
143 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
144 					const struct mipi_dsi_msg *msg);
145 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
146 					u32 dma_base, u32 len);
147 int msm_dsi_host_enable(struct mipi_dsi_host *host);
148 int msm_dsi_host_disable(struct mipi_dsi_host *host);
149 int msm_dsi_host_power_on(struct mipi_dsi_host *host);
150 int msm_dsi_host_power_off(struct mipi_dsi_host *host);
151 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
152 					struct drm_display_mode *mode);
153 struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
154 					unsigned long *panel_flags);
155 struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
156 int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer);
157 void msm_dsi_host_unregister(struct mipi_dsi_host *host);
158 int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
159 			struct msm_dsi_pll *src_pll);
160 void msm_dsi_host_destroy(struct mipi_dsi_host *host);
161 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
162 					struct drm_device *dev);
163 int msm_dsi_host_init(struct msm_dsi *msm_dsi);
164 
165 /* dsi phy */
166 struct msm_dsi_phy;
167 void msm_dsi_phy_driver_register(void);
168 void msm_dsi_phy_driver_unregister(void);
169 int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
170 	const unsigned long bit_rate, const unsigned long esc_rate);
171 void msm_dsi_phy_disable(struct msm_dsi_phy *phy);
172 void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy,
173 					u32 *clk_pre, u32 *clk_post);
174 struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy);
175 
176 #endif /* __DSI_CONNECTOR_H__ */
177 
178