drivers/video/exynos/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 <fdtdec.h>
  13 #include <libfdt.h>
  14 #include <linux/compat.h>
  15 #include <linux/err.h>
  16 #include <asm/arch/dsim.h>
  17 #include <asm/arch/mipi_dsim.h>
  18 #include <asm/arch/power.h>
  19 #include <asm/arch/cpu.h>
  20 #include <asm/arch/clk.h>
  21
  22 #include "exynos_mipi_dsi_lowlevel.h"
  23 #include "exynos_mipi_dsi_common.h"
  24
  25 #define master_to_driver(a)     (a->dsim_lcd_drv)
  26 #define master_to_device(a)     (a->dsim_lcd_dev)
  27
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static struct exynos_platform_mipi_dsim *dsim_pd;
  31 static struct mipi_dsim_config dsim_config_dt;
  32 static struct exynos_platform_mipi_dsim dsim_platform_data_dt;
  33 static struct mipi_dsim_lcd_device mipi_lcd_device_dt;
  34
  35 struct mipi_dsim_ddi {
  36         int                             bus_id;
  37         struct list_head                list;
  38         struct mipi_dsim_lcd_device     *dsim_lcd_dev;
  39         struct mipi_dsim_lcd_driver     *dsim_lcd_drv;
  40 };
  41
  42 static LIST_HEAD(dsim_ddi_list);
  43 static LIST_HEAD(dsim_lcd_dev_list);
  44
  45 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
  46 {
  47         struct mipi_dsim_ddi *dsim_ddi;
  48
  49         if (!lcd_dev) {
  50                 debug("mipi_dsim_lcd_device is NULL.\n");
  51                 return -EFAULT;
  52         }
  53
  54         if (!lcd_dev->name) {
  55                 debug("dsim_lcd_device name is NULL.\n");
  56                 return -EFAULT;
  57         }
  58
  59         dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
  60         if (!dsim_ddi) {
  61                 debug("failed to allocate dsim_ddi object.\n");
  62                 return -EFAULT;
  63         }
  64
  65         dsim_ddi->dsim_lcd_dev = lcd_dev;
  66
  67         list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
  68
  69         return 0;
  70 }
  71
  72 struct mipi_dsim_ddi
  73         *exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
  74 {
  75         struct mipi_dsim_ddi *dsim_ddi;
  76         struct mipi_dsim_lcd_device *lcd_dev;
  77
  78         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
  79                 lcd_dev = dsim_ddi->dsim_lcd_dev;
  80                 if (!lcd_dev)
  81                         continue;
  82
  83                 if (lcd_drv->id >= 0) {
  84                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0 &&
  85                                         lcd_drv->id == lcd_dev->id) {
  86                                 /**
  87                                  * bus_id would be used to identify
  88                                  * connected bus.
  89                                  */
  90                                 dsim_ddi->bus_id = lcd_dev->bus_id;
  91
  92                                 return dsim_ddi;
  93                         }
  94                 } else {
  95                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
  96                                 /**
  97                                  * bus_id would be used to identify
  98                                  * connected bus.
  99                                  */
 100                                 dsim_ddi->bus_id = lcd_dev->bus_id;
 101
 102                                 return dsim_ddi;
 103                         }
 104                 }
 105
 106                 kfree(dsim_ddi);
 107                 list_del(&dsim_ddi_list);
 108         }
 109
 110         return NULL;
 111 }
 112
 113 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
 114 {
 115         struct mipi_dsim_ddi *dsim_ddi;
 116
 117         if (!lcd_drv) {
 118                 debug("mipi_dsim_lcd_driver is NULL.\n");
 119                 return -EFAULT;
 120         }
 121
 122         if (!lcd_drv->name) {
 123                 debug("dsim_lcd_driver name is NULL.\n");
 124                 return -EFAULT;
 125         }
 126
 127         dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
 128         if (!dsim_ddi) {
 129                 debug("mipi_dsim_ddi object not found.\n");
 130                 return -EFAULT;
 131         }
 132
 133         dsim_ddi->dsim_lcd_drv = lcd_drv;
 134
 135         debug("registered panel driver(%s) to mipi-dsi driver.\n",
 136                 lcd_drv->name);
 137
 138         return 0;
 139
 140 }
 141
 142 struct mipi_dsim_ddi
 143         *exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
 144                         const char *name)
 145 {
 146         struct mipi_dsim_ddi *dsim_ddi;
 147         struct mipi_dsim_lcd_driver *lcd_drv;
 148         struct mipi_dsim_lcd_device *lcd_dev;
 149
 150         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
 151                 lcd_drv = dsim_ddi->dsim_lcd_drv;
 152                 lcd_dev = dsim_ddi->dsim_lcd_dev;
 153                 if (!lcd_drv || !lcd_dev)
 154                         continue;
 155
 156                 debug("lcd_drv->id = %d, lcd_dev->id = %d\n",
 157                                         lcd_drv->id, lcd_dev->id);
 158
 159                 if ((strcmp(lcd_drv->name, name) == 0)) {
 160                         lcd_dev->master = dsim;
 161
 162                         dsim->dsim_lcd_dev = lcd_dev;
 163                         dsim->dsim_lcd_drv = lcd_drv;
 164
 165                         return dsim_ddi;
 166                 }
 167         }
 168
 169         return NULL;
 170 }
 171
 172 /* define MIPI-DSI Master operations. */
 173 static struct mipi_dsim_master_ops master_ops = {
 174         .cmd_write                      = exynos_mipi_dsi_wr_data,
 175         .get_dsim_frame_done            = exynos_mipi_dsi_get_frame_done_status,
 176         .clear_dsim_frame_done          = exynos_mipi_dsi_clear_frame_done,
 177 };
 178
 179 int exynos_mipi_dsi_init(void)
 180 {
 181         struct mipi_dsim_device *dsim;
 182         struct mipi_dsim_config *dsim_config;
 183         struct mipi_dsim_ddi *dsim_ddi;
 184
 185         dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
 186         if (!dsim) {
 187                 debug("failed to allocate dsim object.\n");
 188                 return -EFAULT;
 189         }
 190
 191         /* get mipi_dsim_config. */
 192         dsim_config = dsim_pd->dsim_config;
 193         if (dsim_config == NULL) {
 194                 debug("failed to get dsim config data.\n");
 195                 return -EFAULT;
 196         }
 197
 198         dsim->pd = dsim_pd;
 199         dsim->dsim_config = dsim_config;
 200         dsim->master_ops = &master_ops;
 201
 202         /* bind lcd ddi matched with panel name. */
 203         dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
 204         if (!dsim_ddi) {
 205                 debug("mipi_dsim_ddi object not found.\n");
 206                 return -ENOSYS;
 207         }
 208         if (dsim_pd->lcd_power)
 209                 dsim_pd->lcd_power();
 210
 211         if (dsim_pd->mipi_power)
 212                 dsim_pd->mipi_power();
 213
 214         /* phy_enable(unsigned int dev_index, unsigned int enable) */
 215         if (dsim_pd->phy_enable)
 216                 dsim_pd->phy_enable(0, 1);
 217
 218         set_mipi_clk();
 219
 220         exynos_mipi_dsi_init_dsim(dsim);
 221         exynos_mipi_dsi_init_link(dsim);
 222         exynos_mipi_dsi_set_hs_enable(dsim);
 223
 224         /* set display timing. */
 225         exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
 226
 227         /* initialize mipi-dsi client(lcd panel). */
 228         if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->mipi_panel_init) {
 229                 dsim_ddi->dsim_lcd_drv->mipi_panel_init(dsim);
 230                 dsim_ddi->dsim_lcd_drv->mipi_display_on(dsim);
 231         }
 232
 233         debug("mipi-dsi driver(%s mode) has been probed.\n",
 234                 (dsim_config->e_interface == DSIM_COMMAND) ?
 235                         "CPU" : "RGB");
 236
 237         return 0;
 238 }
 239
 240 void exynos_set_dsim_platform_data(struct exynos_platform_mipi_dsim *pd)
 241 {
 242         if (pd == NULL) {
 243                 debug("pd is NULL\n");
 244                 return;
 245         }
 246
 247         dsim_pd = pd;
 248 }
 249
 250 int exynos_dsim_config_parse_dt(const void *blob)
 251 {
 252         int node;
 253
 254         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_MIPI_DSI);
 255         if (node <= 0) {
 256                 printf("exynos_mipi_dsi: Can't get device node for mipi dsi\n");
 257                 return -ENODEV;
 258         }
 259
 260         dsim_config_dt.e_interface = fdtdec_get_int(blob, node,
 261                                 "samsung,dsim-config-e-interface", 0);
 262
 263         dsim_config_dt.e_virtual_ch = fdtdec_get_int(blob, node,
 264                                 "samsung,dsim-config-e-virtual-ch", 0);
 265
 266         dsim_config_dt.e_pixel_format = fdtdec_get_int(blob, node,
 267                                 "samsung,dsim-config-e-pixel-format", 0);
 268
 269         dsim_config_dt.e_burst_mode = fdtdec_get_int(blob, node,
 270                                 "samsung,dsim-config-e-burst-mode", 0);
 271
 272         dsim_config_dt.e_no_data_lane = fdtdec_get_int(blob, node,
 273                                 "samsung,dsim-config-e-no-data-lane", 0);
 274
 275         dsim_config_dt.e_byte_clk = fdtdec_get_int(blob, node,
 276                                 "samsung,dsim-config-e-byte-clk", 0);
 277
 278         dsim_config_dt.hfp = fdtdec_get_int(blob, node,
 279                                 "samsung,dsim-config-hfp", 0);
 280
 281         dsim_config_dt.p = fdtdec_get_int(blob, node,
 282                                           "samsung,dsim-config-p", 0);
 283         dsim_config_dt.m = fdtdec_get_int(blob, node,
 284                                           "samsung,dsim-config-m", 0);
 285         dsim_config_dt.s = fdtdec_get_int(blob, node,
 286                                           "samsung,dsim-config-s", 0);
 287
 288         dsim_config_dt.pll_stable_time = fdtdec_get_int(blob, node,
 289                                 "samsung,dsim-config-pll-stable-time", 0);
 290
 291         dsim_config_dt.esc_clk = fdtdec_get_int(blob, node,
 292                                 "samsung,dsim-config-esc-clk", 0);
 293
 294         dsim_config_dt.stop_holding_cnt = fdtdec_get_int(blob, node,
 295                                 "samsung,dsim-config-stop-holding-cnt", 0);
 296
 297         dsim_config_dt.bta_timeout = fdtdec_get_int(blob, node,
 298                                 "samsung,dsim-config-bta-timeout", 0);
 299
 300         dsim_config_dt.rx_timeout = fdtdec_get_int(blob, node,
 301                                 "samsung,dsim-config-rx-timeout", 0);
 302
 303         mipi_lcd_device_dt.name = fdtdec_get_config_string(blob,
 304                                 "samsung,dsim-device-name");
 305
 306         mipi_lcd_device_dt.id = fdtdec_get_int(blob, node,
 307                                 "samsung,dsim-device-id", 0);
 308
 309         mipi_lcd_device_dt.bus_id = fdtdec_get_int(blob, node,
 310                                 "samsung,dsim-device-bus_id", 0);
 311
 312         mipi_lcd_device_dt.reverse_panel = fdtdec_get_int(blob, node,
 313                                 "samsung,dsim-device-reverse-panel", 0);
 314
 315         return 0;
 316 }
 317
 318 void exynos_init_dsim_platform_data(vidinfo_t *vid)
 319 {
 320         if (exynos_dsim_config_parse_dt(gd->fdt_blob))
 321                 debug("Can't get proper dsim config.\n");
 322
 323         strcpy(dsim_platform_data_dt.lcd_panel_name, mipi_lcd_device_dt.name);
 324         dsim_platform_data_dt.dsim_config = &dsim_config_dt;
 325         dsim_platform_data_dt.mipi_power = mipi_power;
 326         dsim_platform_data_dt.phy_enable = set_mipi_phy_ctrl;
 327         dsim_platform_data_dt.lcd_panel_info = (void *)vid;
 328
 329         mipi_lcd_device_dt.platform_data = (void *)&dsim_platform_data_dt;
 330         exynos_mipi_dsi_register_lcd_device(&mipi_lcd_device_dt);
 331
 332         dsim_pd = &dsim_platform_data_dt;
 333 }