drivers/gpu/drm/msm/dsi/dsi.h

   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/drm_crtc.h>
  21 #include <drm/drm_mipi_dsi.h>
  22 #include <drm/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 struct msm_dsi_phy_shared_timings;
  31 struct msm_dsi_phy_clk_request;
  32
  33 enum msm_dsi_phy_type {
  34         MSM_DSI_PHY_28NM_HPM,
  35         MSM_DSI_PHY_28NM_LP,
  36         MSM_DSI_PHY_20NM,
  37         MSM_DSI_PHY_28NM_8960,
  38         MSM_DSI_PHY_14NM,
  39         MSM_DSI_PHY_MAX
  40 };
  41
  42 enum msm_dsi_phy_usecase {
  43         MSM_DSI_PHY_STANDALONE,
  44         MSM_DSI_PHY_MASTER,
  45         MSM_DSI_PHY_SLAVE,
  46 };
  47
  48 #define DSI_DEV_REGULATOR_MAX   8
  49 #define DSI_BUS_CLK_MAX         4
  50
  51 /* Regulators for DSI devices */
  52 struct dsi_reg_entry {
  53         char name[32];
  54         int enable_load;
  55         int disable_load;
  56 };
  57
  58 struct dsi_reg_config {
  59         int num;
  60         struct dsi_reg_entry regs[DSI_DEV_REGULATOR_MAX];
  61 };
  62
  63 struct msm_dsi {
  64         struct drm_device *dev;
  65         struct platform_device *pdev;
  66
  67         /* connector managed by us when we're connected to a drm_panel */
  68         struct drm_connector *connector;
  69         /* internal dsi bridge attached to MDP interface */
  70         struct drm_bridge *bridge;
  71
  72         struct mipi_dsi_host *host;
  73         struct msm_dsi_phy *phy;
  74
  75         /*
  76          * panel/external_bridge connected to dsi bridge output, only one of the
  77          * two can be valid at a time
  78          */
  79         struct drm_panel *panel;
  80         struct drm_bridge *external_bridge;
  81         unsigned long device_flags;
  82
  83         struct device *phy_dev;
  84         bool phy_enabled;
  85
  86         /* the encoder we are hooked to (outside of dsi block) */
  87         struct drm_encoder *encoder;
  88
  89         int id;
  90 };
  91
  92 /* dsi manager */
  93 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
  94 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
  95 struct drm_connector *msm_dsi_manager_connector_init(u8 id);
  96 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
  97 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
  98 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
  99 void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags);
 100 int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
 101 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
 102
 103 /* msm dsi */
 104 static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
 105 {
 106         return msm_dsi->panel || msm_dsi->external_bridge;
 107 }
 108
 109 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
 110
 111 /* dsi pll */
 112 struct msm_dsi_pll;
 113 #ifdef CONFIG_DRM_MSM_DSI_PLL
 114 struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
 115                         enum msm_dsi_phy_type type, int dsi_id);
 116 void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
 117 int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
 118         struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
 119 void msm_dsi_pll_save_state(struct msm_dsi_pll *pll);
 120 int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll);
 121 int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
 122                             enum msm_dsi_phy_usecase uc);
 123 #else
 124 static inline struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
 125                          enum msm_dsi_phy_type type, int id) {
 126         return ERR_PTR(-ENODEV);
 127 }
 128 static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
 129 {
 130 }
 131 static inline int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
 132         struct clk **byte_clk_provider, struct clk **pixel_clk_provider)
 133 {
 134         return -ENODEV;
 135 }
 136 static inline void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
 137 {
 138 }
 139 static inline int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll)
 140 {
 141         return 0;
 142 }
 143 static inline int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
 144                                           enum msm_dsi_phy_usecase uc)
 145 {
 146         return -ENODEV;
 147 }
 148 #endif
 149
 150 /* dsi host */
 151 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
 152                                         const struct mipi_dsi_msg *msg);
 153 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
 154                                         const struct mipi_dsi_msg *msg);
 155 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
 156                                         const struct mipi_dsi_msg *msg);
 157 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
 158                                         const struct mipi_dsi_msg *msg);
 159 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
 160                                         u32 dma_base, u32 len);
 161 int msm_dsi_host_enable(struct mipi_dsi_host *host);
 162 int msm_dsi_host_disable(struct mipi_dsi_host *host);
 163 int msm_dsi_host_power_on(struct mipi_dsi_host *host,
 164                         struct msm_dsi_phy_shared_timings *phy_shared_timings);
 165 int msm_dsi_host_power_off(struct mipi_dsi_host *host);
 166 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
 167                                         struct drm_display_mode *mode);
 168 struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
 169                                         unsigned long *panel_flags);
 170 struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
 171 int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer);
 172 void msm_dsi_host_unregister(struct mipi_dsi_host *host);
 173 int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
 174                         struct msm_dsi_pll *src_pll);
 175 void msm_dsi_host_reset_phy(struct mipi_dsi_host *host);
 176 void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
 177         struct msm_dsi_phy_clk_request *clk_req);
 178 void msm_dsi_host_destroy(struct mipi_dsi_host *host);
 179 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
 180                                         struct drm_device *dev);
 181 int msm_dsi_host_init(struct msm_dsi *msm_dsi);
 182
 183 /* dsi phy */
 184 struct msm_dsi_phy;
 185 struct msm_dsi_phy_shared_timings {
 186         u32 clk_post;
 187         u32 clk_pre;
 188         bool clk_pre_inc_by_2;
 189 };
 190
 191 struct msm_dsi_phy_clk_request {
 192         unsigned long bitclk_rate;
 193         unsigned long escclk_rate;
 194 };
 195
 196 void msm_dsi_phy_driver_register(void);
 197 void msm_dsi_phy_driver_unregister(void);
 198 int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 199                         struct msm_dsi_phy_clk_request *clk_req);
 200 void msm_dsi_phy_disable(struct msm_dsi_phy *phy);
 201 void msm_dsi_phy_get_shared_timings(struct msm_dsi_phy *phy,
 202                         struct msm_dsi_phy_shared_timings *shared_timing);
 203 struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy);
 204 void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
 205                              enum msm_dsi_phy_usecase uc);
 206
 207 #endif /* __DSI_CONNECTOR_H__ */
 208