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_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 min_voltage;
  45         int max_voltage;
  46         int enable_load;
  47         int disable_load;
  48 };
  49
  50 struct dsi_reg_config {
  51         int num;
  52         struct dsi_reg_entry regs[DSI_DEV_REGULATOR_MAX];
  53 };
  54
  55 struct msm_dsi {
  56         struct drm_device *dev;
  57         struct platform_device *pdev;
  58
  59         /* connector managed by us when we're connected to a drm_panel */
  60         struct drm_connector *connector;
  61         /* internal dsi bridge attached to MDP interface */
  62         struct drm_bridge *bridge;
  63
  64         struct mipi_dsi_host *host;
  65         struct msm_dsi_phy *phy;
  66
  67         /*
  68          * panel/external_bridge connected to dsi bridge output, only one of the
  69          * two can be valid at a time
  70          */
  71         struct drm_panel *panel;
  72         struct drm_bridge *external_bridge;
  73         unsigned long device_flags;
  74
  75         struct device *phy_dev;
  76         bool phy_enabled;
  77
  78         /* the encoders we are hooked to (outside of dsi block) */
  79         struct drm_encoder *encoders[MSM_DSI_ENCODER_NUM];
  80
  81         int id;
  82 };
  83
  84 /* dsi manager */
  85 struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
  86 void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
  87 struct drm_connector *msm_dsi_manager_connector_init(u8 id);
  88 struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
  89 int msm_dsi_manager_phy_enable(int id,
  90                 const unsigned long bit_rate, const unsigned long esc_rate,
  91                 u32 *clk_pre, u32 *clk_post);
  92 void msm_dsi_manager_phy_disable(int id);
  93 int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
  94 bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
  95 int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
  96 void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
  97
  98 /* msm dsi */
  99 static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
 100 {
 101         return msm_dsi->panel || msm_dsi->external_bridge;
 102 }
 103
 104 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
 105
 106 /* dsi pll */
 107 struct msm_dsi_pll;
 108 #ifdef CONFIG_DRM_MSM_DSI_PLL
 109 struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
 110                         enum msm_dsi_phy_type type, int dsi_id);
 111 void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
 112 int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
 113         struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
 114 void msm_dsi_pll_save_state(struct msm_dsi_pll *pll);
 115 int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll);
 116 #else
 117 static inline struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
 118                          enum msm_dsi_phy_type type, int id) {
 119         return ERR_PTR(-ENODEV);
 120 }
 121 static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
 122 {
 123 }
 124 static inline int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
 125         struct clk **byte_clk_provider, struct clk **pixel_clk_provider)
 126 {
 127         return -ENODEV;
 128 }
 129 static inline void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
 130 {
 131 }
 132 static inline int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll)
 133 {
 134         return 0;
 135 }
 136 #endif
 137
 138 /* dsi host */
 139 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
 140                                         const struct mipi_dsi_msg *msg);
 141 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
 142                                         const struct mipi_dsi_msg *msg);
 143 int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
 144                                         const struct mipi_dsi_msg *msg);
 145 int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
 146                                         const struct mipi_dsi_msg *msg);
 147 void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
 148                                         u32 dma_base, u32 len);
 149 int msm_dsi_host_enable(struct mipi_dsi_host *host);
 150 int msm_dsi_host_disable(struct mipi_dsi_host *host);
 151 int msm_dsi_host_power_on(struct mipi_dsi_host *host);
 152 int msm_dsi_host_power_off(struct mipi_dsi_host *host);
 153 int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
 154                                         struct drm_display_mode *mode);
 155 struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
 156                                         unsigned long *panel_flags);
 157 struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
 158 int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer);
 159 void msm_dsi_host_unregister(struct mipi_dsi_host *host);
 160 int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
 161                         struct msm_dsi_pll *src_pll);
 162 void msm_dsi_host_destroy(struct mipi_dsi_host *host);
 163 int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
 164                                         struct drm_device *dev);
 165 int msm_dsi_host_init(struct msm_dsi *msm_dsi);
 166
 167 /* dsi phy */
 168 struct msm_dsi_phy;
 169 void msm_dsi_phy_driver_register(void);
 170 void msm_dsi_phy_driver_unregister(void);
 171 int msm_dsi_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 172         const unsigned long bit_rate, const unsigned long esc_rate);
 173 void msm_dsi_phy_disable(struct msm_dsi_phy *phy);
 174 void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy,
 175                                         u32 *clk_pre, u32 *clk_post);
 176 struct msm_dsi_pll *msm_dsi_phy_get_pll(struct msm_dsi_phy *phy);
 177
 178 #endif /* __DSI_CONNECTOR_H__ */
 179