drivers/video/exynos_mipi_dsi.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  *
   4  * Author: InKi Dae <inki.dae@samsung.com>
   5  * Author: Donghwa Lee <dh09.lee@samsung.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <malloc.h>
  12 #include <linux/err.h>
  13 #include <asm/arch/dsim.h>
  14 #include <asm/arch/mipi_dsim.h>
  15 #include <asm/arch/power.h>
  16 #include <asm/arch/cpu.h>
  17 #include <asm/arch/clk.h>
  18
  19 #include "exynos_mipi_dsi_lowlevel.h"
  20 #include "exynos_mipi_dsi_common.h"
  21
  22 #define master_to_driver(a)     (a->dsim_lcd_drv)
  23 #define master_to_device(a)     (a->dsim_lcd_dev)
  24
  25 static struct exynos_platform_mipi_dsim *dsim_pd;
  26
  27 struct mipi_dsim_ddi {
  28         int                             bus_id;
  29         struct list_head                list;
  30         struct mipi_dsim_lcd_device     *dsim_lcd_dev;
  31         struct mipi_dsim_lcd_driver     *dsim_lcd_drv;
  32 };
  33
  34 static LIST_HEAD(dsim_ddi_list);
  35 static LIST_HEAD(dsim_lcd_dev_list);
  36
  37 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
  38 {
  39         struct mipi_dsim_ddi *dsim_ddi;
  40
  41         if (!lcd_dev) {
  42                 debug("mipi_dsim_lcd_device is NULL.\n");
  43                 return -EFAULT;
  44         }
  45
  46         if (!lcd_dev->name) {
  47                 debug("dsim_lcd_device name is NULL.\n");
  48                 return -EFAULT;
  49         }
  50
  51         dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
  52         if (!dsim_ddi) {
  53                 debug("failed to allocate dsim_ddi object.\n");
  54                 return -EFAULT;
  55         }
  56
  57         dsim_ddi->dsim_lcd_dev = lcd_dev;
  58
  59         list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
  60
  61         return 0;
  62 }
  63
  64 struct mipi_dsim_ddi
  65         *exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
  66 {
  67         struct mipi_dsim_ddi *dsim_ddi;
  68         struct mipi_dsim_lcd_device *lcd_dev;
  69
  70         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
  71                 lcd_dev = dsim_ddi->dsim_lcd_dev;
  72                 if (!lcd_dev)
  73                         continue;
  74
  75                 if (lcd_drv->id >= 0) {
  76                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0 &&
  77                                         lcd_drv->id == lcd_dev->id) {
  78                                 /**
  79                                  * bus_id would be used to identify
  80                                  * connected bus.
  81                                  */
  82                                 dsim_ddi->bus_id = lcd_dev->bus_id;
  83
  84                                 return dsim_ddi;
  85                         }
  86                 } else {
  87                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
  88                                 /**
  89                                  * bus_id would be used to identify
  90                                  * connected bus.
  91                                  */
  92                                 dsim_ddi->bus_id = lcd_dev->bus_id;
  93
  94                                 return dsim_ddi;
  95                         }
  96                 }
  97
  98                 kfree(dsim_ddi);
  99                 list_del(&dsim_ddi_list);
 100         }
 101
 102         return NULL;
 103 }
 104
 105 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
 106 {
 107         struct mipi_dsim_ddi *dsim_ddi;
 108
 109         if (!lcd_drv) {
 110                 debug("mipi_dsim_lcd_driver is NULL.\n");
 111                 return -EFAULT;
 112         }
 113
 114         if (!lcd_drv->name) {
 115                 debug("dsim_lcd_driver name is NULL.\n");
 116                 return -EFAULT;
 117         }
 118
 119         dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
 120         if (!dsim_ddi) {
 121                 debug("mipi_dsim_ddi object not found.\n");
 122                 return -EFAULT;
 123         }
 124
 125         dsim_ddi->dsim_lcd_drv = lcd_drv;
 126
 127         debug("registered panel driver(%s) to mipi-dsi driver.\n",
 128                 lcd_drv->name);
 129
 130         return 0;
 131
 132 }
 133
 134 struct mipi_dsim_ddi
 135         *exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
 136                         const char *name)
 137 {
 138         struct mipi_dsim_ddi *dsim_ddi;
 139         struct mipi_dsim_lcd_driver *lcd_drv;
 140         struct mipi_dsim_lcd_device *lcd_dev;
 141
 142         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
 143                 lcd_drv = dsim_ddi->dsim_lcd_drv;
 144                 lcd_dev = dsim_ddi->dsim_lcd_dev;
 145                 if (!lcd_drv || !lcd_dev)
 146                         continue;
 147
 148                 debug("lcd_drv->id = %d, lcd_dev->id = %d\n",
 149                                         lcd_drv->id, lcd_dev->id);
 150
 151                 if ((strcmp(lcd_drv->name, name) == 0)) {
 152                         lcd_dev->master = dsim;
 153
 154                         dsim->dsim_lcd_dev = lcd_dev;
 155                         dsim->dsim_lcd_drv = lcd_drv;
 156
 157                         return dsim_ddi;
 158                 }
 159         }
 160
 161         return NULL;
 162 }
 163
 164 /* define MIPI-DSI Master operations. */
 165 static struct mipi_dsim_master_ops master_ops = {
 166         .cmd_write                      = exynos_mipi_dsi_wr_data,
 167         .get_dsim_frame_done            = exynos_mipi_dsi_get_frame_done_status,
 168         .clear_dsim_frame_done          = exynos_mipi_dsi_clear_frame_done,
 169 };
 170
 171 int exynos_mipi_dsi_init(void)
 172 {
 173         struct mipi_dsim_device *dsim;
 174         struct mipi_dsim_config *dsim_config;
 175         struct mipi_dsim_ddi *dsim_ddi;
 176
 177         dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
 178         if (!dsim) {
 179                 debug("failed to allocate dsim object.\n");
 180                 return -EFAULT;
 181         }
 182
 183         /* get mipi_dsim_config. */
 184         dsim_config = dsim_pd->dsim_config;
 185         if (dsim_config == NULL) {
 186                 debug("failed to get dsim config data.\n");
 187                 return -EFAULT;
 188         }
 189
 190         dsim->pd = dsim_pd;
 191         dsim->dsim_config = dsim_config;
 192         dsim->master_ops = &master_ops;
 193
 194         /* bind lcd ddi matched with panel name. */
 195         dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
 196         if (!dsim_ddi) {
 197                 debug("mipi_dsim_ddi object not found.\n");
 198                 return -ENOSYS;
 199         }
 200         if (dsim_pd->lcd_power)
 201                 dsim_pd->lcd_power();
 202
 203         if (dsim_pd->mipi_power)
 204                 dsim_pd->mipi_power();
 205
 206         /* phy_enable(unsigned int dev_index, unsigned int enable) */
 207         if (dsim_pd->phy_enable)
 208                 dsim_pd->phy_enable(0, 1);
 209
 210         set_mipi_clk();
 211
 212         exynos_mipi_dsi_init_dsim(dsim);
 213         exynos_mipi_dsi_init_link(dsim);
 214         exynos_mipi_dsi_set_hs_enable(dsim);
 215
 216         /* set display timing. */
 217         exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
 218
 219         /* initialize mipi-dsi client(lcd panel). */
 220         if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->mipi_panel_init) {
 221                 dsim_ddi->dsim_lcd_drv->mipi_panel_init(dsim);
 222                 dsim_ddi->dsim_lcd_drv->mipi_display_on(dsim);
 223         }
 224
 225         debug("mipi-dsi driver(%s mode) has been probed.\n",
 226                 (dsim_config->e_interface == DSIM_COMMAND) ?
 227                         "CPU" : "RGB");
 228
 229         return 0;
 230 }
 231
 232 void exynos_set_dsim_platform_data(struct exynos_platform_mipi_dsim *pd)
 233 {
 234         if (pd == NULL) {
 235                 debug("pd is NULL\n");
 236                 return;
 237         }
 238
 239         dsim_pd = pd;
 240 }