drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
   4  */
   5
   6 #include <linux/delay.h>
   7 #include <linux/gpio/consumer.h>
   8 #include <linux/module.h>
   9 #include <linux/of.h>
  10 #include <linux/regulator/consumer.h>
  11
  12 #include <video/mipi_display.h>
  13
  14 #include <drm/drm_crtc.h>
  15 #include <drm/drm_device.h>
  16 #include <drm/drm_mipi_dsi.h>
  17 #include <drm/drm_modes.h>
  18 #include <drm/drm_panel.h>
  19 #include <drm/drm_print.h>
  20
  21 struct kingdisplay_panel {
  22         struct drm_panel base;
  23         struct mipi_dsi_device *link;
  24
  25         struct regulator *supply;
  26         struct gpio_desc *enable_gpio;
  27
  28         bool prepared;
  29         bool enabled;
  30 };
  31
  32 struct kingdisplay_panel_cmd {
  33         char cmd;
  34         char data;
  35 };
  36
  37 /*
  38  * According to the discussion on
  39  * https://review.coreboot.org/#/c/coreboot/+/22472/
  40  * the panel init array is not part of the panels datasheet but instead
  41  * just came in this form from the panel vendor.
  42  */
  43 static const struct kingdisplay_panel_cmd init_code[] = {
  44         /* voltage setting */
  45         { 0xB0, 0x00 },
  46         { 0xB2, 0x02 },
  47         { 0xB3, 0x11 },
  48         { 0xB4, 0x00 },
  49         { 0xB6, 0x80 },
  50         /* VCOM disable */
  51         { 0xB7, 0x02 },
  52         { 0xB8, 0x80 },
  53         { 0xBA, 0x43 },
  54         /* VCOM setting */
  55         { 0xBB, 0x53 },
  56         /* VSP setting */
  57         { 0xBC, 0x0A },
  58         /* VSN setting */
  59         { 0xBD, 0x4A },
  60         /* VGH setting */
  61         { 0xBE, 0x2F },
  62         /* VGL setting */
  63         { 0xBF, 0x1A },
  64         { 0xF0, 0x39 },
  65         { 0xF1, 0x22 },
  66         /* Gamma setting */
  67         { 0xB0, 0x02 },
  68         { 0xC0, 0x00 },
  69         { 0xC1, 0x01 },
  70         { 0xC2, 0x0B },
  71         { 0xC3, 0x15 },
  72         { 0xC4, 0x22 },
  73         { 0xC5, 0x11 },
  74         { 0xC6, 0x15 },
  75         { 0xC7, 0x19 },
  76         { 0xC8, 0x1A },
  77         { 0xC9, 0x16 },
  78         { 0xCA, 0x18 },
  79         { 0xCB, 0x13 },
  80         { 0xCC, 0x18 },
  81         { 0xCD, 0x13 },
  82         { 0xCE, 0x1C },
  83         { 0xCF, 0x19 },
  84         { 0xD0, 0x21 },
  85         { 0xD1, 0x2C },
  86         { 0xD2, 0x2F },
  87         { 0xD3, 0x30 },
  88         { 0xD4, 0x19 },
  89         { 0xD5, 0x1F },
  90         { 0xD6, 0x00 },
  91         { 0xD7, 0x01 },
  92         { 0xD8, 0x0B },
  93         { 0xD9, 0x15 },
  94         { 0xDA, 0x22 },
  95         { 0xDB, 0x11 },
  96         { 0xDC, 0x15 },
  97         { 0xDD, 0x19 },
  98         { 0xDE, 0x1A },
  99         { 0xDF, 0x16 },
 100         { 0xE0, 0x18 },
 101         { 0xE1, 0x13 },
 102         { 0xE2, 0x18 },
 103         { 0xE3, 0x13 },
 104         { 0xE4, 0x1C },
 105         { 0xE5, 0x19 },
 106         { 0xE6, 0x21 },
 107         { 0xE7, 0x2C },
 108         { 0xE8, 0x2F },
 109         { 0xE9, 0x30 },
 110         { 0xEA, 0x19 },
 111         { 0xEB, 0x1F },
 112         /* GOA MUX setting */
 113         { 0xB0, 0x01 },
 114         { 0xC0, 0x10 },
 115         { 0xC1, 0x0F },
 116         { 0xC2, 0x0E },
 117         { 0xC3, 0x0D },
 118         { 0xC4, 0x0C },
 119         { 0xC5, 0x0B },
 120         { 0xC6, 0x0A },
 121         { 0xC7, 0x09 },
 122         { 0xC8, 0x08 },
 123         { 0xC9, 0x07 },
 124         { 0xCA, 0x06 },
 125         { 0xCB, 0x05 },
 126         { 0xCC, 0x00 },
 127         { 0xCD, 0x01 },
 128         { 0xCE, 0x02 },
 129         { 0xCF, 0x03 },
 130         { 0xD0, 0x04 },
 131         { 0xD6, 0x10 },
 132         { 0xD7, 0x0F },
 133         { 0xD8, 0x0E },
 134         { 0xD9, 0x0D },
 135         { 0xDA, 0x0C },
 136         { 0xDB, 0x0B },
 137         { 0xDC, 0x0A },
 138         { 0xDD, 0x09 },
 139         { 0xDE, 0x08 },
 140         { 0xDF, 0x07 },
 141         { 0xE0, 0x06 },
 142         { 0xE1, 0x05 },
 143         { 0xE2, 0x00 },
 144         { 0xE3, 0x01 },
 145         { 0xE4, 0x02 },
 146         { 0xE5, 0x03 },
 147         { 0xE6, 0x04 },
 148         { 0xE7, 0x00 },
 149         { 0xEC, 0xC0 },
 150         /* GOA timing setting */
 151         { 0xB0, 0x03 },
 152         { 0xC0, 0x01 },
 153         { 0xC2, 0x6F },
 154         { 0xC3, 0x6F },
 155         { 0xC5, 0x36 },
 156         { 0xC8, 0x08 },
 157         { 0xC9, 0x04 },
 158         { 0xCA, 0x41 },
 159         { 0xCC, 0x43 },
 160         { 0xCF, 0x60 },
 161         { 0xD2, 0x04 },
 162         { 0xD3, 0x04 },
 163         { 0xD4, 0x03 },
 164         { 0xD5, 0x02 },
 165         { 0xD6, 0x01 },
 166         { 0xD7, 0x00 },
 167         { 0xDB, 0x01 },
 168         { 0xDE, 0x36 },
 169         { 0xE6, 0x6F },
 170         { 0xE7, 0x6F },
 171         /* GOE setting */
 172         { 0xB0, 0x06 },
 173         { 0xB8, 0xA5 },
 174         { 0xC0, 0xA5 },
 175         { 0xD5, 0x3F },
 176 };
 177
 178 static inline
 179 struct kingdisplay_panel *to_kingdisplay_panel(struct drm_panel *panel)
 180 {
 181         return container_of(panel, struct kingdisplay_panel, base);
 182 }
 183
 184 static int kingdisplay_panel_disable(struct drm_panel *panel)
 185 {
 186         struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 187         int err;
 188
 189         if (!kingdisplay->enabled)
 190                 return 0;
 191
 192         err = mipi_dsi_dcs_set_display_off(kingdisplay->link);
 193         if (err < 0)
 194                 DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
 195                               err);
 196
 197         kingdisplay->enabled = false;
 198
 199         return 0;
 200 }
 201
 202 static int kingdisplay_panel_unprepare(struct drm_panel *panel)
 203 {
 204         struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 205         int err;
 206
 207         if (!kingdisplay->prepared)
 208                 return 0;
 209
 210         err = mipi_dsi_dcs_enter_sleep_mode(kingdisplay->link);
 211         if (err < 0) {
 212                 DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
 213                               err);
 214                 return err;
 215         }
 216
 217         /* T15: 120ms */
 218         msleep(120);
 219
 220         gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
 221
 222         err = regulator_disable(kingdisplay->supply);
 223         if (err < 0)
 224                 return err;
 225
 226         kingdisplay->prepared = false;
 227
 228         return 0;
 229 }
 230
 231 static int kingdisplay_panel_prepare(struct drm_panel *panel)
 232 {
 233         struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 234         int err, regulator_err;
 235         unsigned int i;
 236
 237         if (kingdisplay->prepared)
 238                 return 0;
 239
 240         gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
 241
 242         err = regulator_enable(kingdisplay->supply);
 243         if (err < 0)
 244                 return err;
 245
 246         /* T2: 15ms */
 247         usleep_range(15000, 16000);
 248
 249         gpiod_set_value_cansleep(kingdisplay->enable_gpio, 1);
 250
 251         /* T4: 15ms */
 252         usleep_range(15000, 16000);
 253
 254         for (i = 0; i < ARRAY_SIZE(init_code); i++) {
 255                 err = mipi_dsi_generic_write(kingdisplay->link, &init_code[i],
 256                                         sizeof(struct kingdisplay_panel_cmd));
 257                 if (err < 0) {
 258                         DRM_DEV_ERROR(panel->dev, "failed write init cmds: %d\n",
 259                                       err);
 260                         goto poweroff;
 261                 }
 262         }
 263
 264         err = mipi_dsi_dcs_exit_sleep_mode(kingdisplay->link);
 265         if (err < 0) {
 266                 DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
 267                               err);
 268                 goto poweroff;
 269         }
 270
 271         /* T6: 120ms */
 272         msleep(120);
 273
 274         err = mipi_dsi_dcs_set_display_on(kingdisplay->link);
 275         if (err < 0) {
 276                 DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
 277                               err);
 278                 goto poweroff;
 279         }
 280
 281         /* T7: 10ms */
 282         usleep_range(10000, 11000);
 283
 284         kingdisplay->prepared = true;
 285
 286         return 0;
 287
 288 poweroff:
 289         gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
 290
 291         regulator_err = regulator_disable(kingdisplay->supply);
 292         if (regulator_err)
 293                 DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
 294                               regulator_err);
 295
 296         return err;
 297 }
 298
 299 static int kingdisplay_panel_enable(struct drm_panel *panel)
 300 {
 301         struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
 302
 303         if (kingdisplay->enabled)
 304                 return 0;
 305
 306         kingdisplay->enabled = true;
 307
 308         return 0;
 309 }
 310
 311 static const struct drm_display_mode default_mode = {
 312         .clock = 229000,
 313         .hdisplay = 1536,
 314         .hsync_start = 1536 + 100,
 315         .hsync_end = 1536 + 100 + 24,
 316         .htotal = 1536 + 100 + 24 + 100,
 317         .vdisplay = 2048,
 318         .vsync_start = 2048 + 95,
 319         .vsync_end = 2048 + 95 + 2,
 320         .vtotal = 2048 + 95 + 2 + 23,
 321         .vrefresh = 60,
 322 };
 323
 324 static int kingdisplay_panel_get_modes(struct drm_panel *panel,
 325                                        struct drm_connector *connector)
 326 {
 327         struct drm_display_mode *mode;
 328
 329         mode = drm_mode_duplicate(connector->dev, &default_mode);
 330         if (!mode) {
 331                 DRM_DEV_ERROR(panel->dev, "failed to add mode %ux%ux@%u\n",
 332                               default_mode.hdisplay, default_mode.vdisplay,
 333                               default_mode.vrefresh);
 334                 return -ENOMEM;
 335         }
 336
 337         drm_mode_set_name(mode);
 338
 339         drm_mode_probed_add(connector, mode);
 340
 341         connector->display_info.width_mm = 147;
 342         connector->display_info.height_mm = 196;
 343         connector->display_info.bpc = 8;
 344
 345         return 1;
 346 }
 347
 348 static const struct drm_panel_funcs kingdisplay_panel_funcs = {
 349         .disable = kingdisplay_panel_disable,
 350         .unprepare = kingdisplay_panel_unprepare,
 351         .prepare = kingdisplay_panel_prepare,
 352         .enable = kingdisplay_panel_enable,
 353         .get_modes = kingdisplay_panel_get_modes,
 354 };
 355
 356 static const struct of_device_id kingdisplay_of_match[] = {
 357         { .compatible = "kingdisplay,kd097d04", },
 358         { }
 359 };
 360 MODULE_DEVICE_TABLE(of, kingdisplay_of_match);
 361
 362 static int kingdisplay_panel_add(struct kingdisplay_panel *kingdisplay)
 363 {
 364         struct device *dev = &kingdisplay->link->dev;
 365         int err;
 366
 367         kingdisplay->supply = devm_regulator_get(dev, "power");
 368         if (IS_ERR(kingdisplay->supply))
 369                 return PTR_ERR(kingdisplay->supply);
 370
 371         kingdisplay->enable_gpio = devm_gpiod_get_optional(dev, "enable",
 372                                                            GPIOD_OUT_HIGH);
 373         if (IS_ERR(kingdisplay->enable_gpio)) {
 374                 err = PTR_ERR(kingdisplay->enable_gpio);
 375                 dev_dbg(dev, "failed to get enable gpio: %d\n", err);
 376                 kingdisplay->enable_gpio = NULL;
 377         }
 378
 379         drm_panel_init(&kingdisplay->base, &kingdisplay->link->dev,
 380                        &kingdisplay_panel_funcs, DRM_MODE_CONNECTOR_DSI);
 381
 382         err = drm_panel_of_backlight(&kingdisplay->base);
 383         if (err)
 384                 return err;
 385
 386         return drm_panel_add(&kingdisplay->base);
 387 }
 388
 389 static void kingdisplay_panel_del(struct kingdisplay_panel *kingdisplay)
 390 {
 391         drm_panel_remove(&kingdisplay->base);
 392 }
 393
 394 static int kingdisplay_panel_probe(struct mipi_dsi_device *dsi)
 395 {
 396         struct kingdisplay_panel *kingdisplay;
 397         int err;
 398
 399         dsi->lanes = 4;
 400         dsi->format = MIPI_DSI_FMT_RGB888;
 401         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
 402                           MIPI_DSI_MODE_LPM;
 403
 404         kingdisplay = devm_kzalloc(&dsi->dev, sizeof(*kingdisplay), GFP_KERNEL);
 405         if (!kingdisplay)
 406                 return -ENOMEM;
 407
 408         mipi_dsi_set_drvdata(dsi, kingdisplay);
 409         kingdisplay->link = dsi;
 410
 411         err = kingdisplay_panel_add(kingdisplay);
 412         if (err < 0)
 413                 return err;
 414
 415         return mipi_dsi_attach(dsi);
 416 }
 417
 418 static int kingdisplay_panel_remove(struct mipi_dsi_device *dsi)
 419 {
 420         struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
 421         int err;
 422
 423         err = drm_panel_unprepare(&kingdisplay->base);
 424         if (err < 0)
 425                 DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
 426                               err);
 427
 428         err = drm_panel_disable(&kingdisplay->base);
 429         if (err < 0)
 430                 DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
 431
 432         err = mipi_dsi_detach(dsi);
 433         if (err < 0)
 434                 DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
 435                               err);
 436
 437         kingdisplay_panel_del(kingdisplay);
 438
 439         return 0;
 440 }
 441
 442 static void kingdisplay_panel_shutdown(struct mipi_dsi_device *dsi)
 443 {
 444         struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
 445
 446         drm_panel_unprepare(&kingdisplay->base);
 447         drm_panel_disable(&kingdisplay->base);
 448 }
 449
 450 static struct mipi_dsi_driver kingdisplay_panel_driver = {
 451         .driver = {
 452                 .name = "panel-kingdisplay-kd097d04",
 453                 .of_match_table = kingdisplay_of_match,
 454         },
 455         .probe = kingdisplay_panel_probe,
 456         .remove = kingdisplay_panel_remove,
 457         .shutdown = kingdisplay_panel_shutdown,
 458 };
 459 module_mipi_dsi_driver(kingdisplay_panel_driver);
 460
 461 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
 462 MODULE_AUTHOR("Nickey Yang <nickey.yang@rock-chips.com>");
 463 MODULE_DESCRIPTION("kingdisplay KD097D04 panel driver");
 464 MODULE_LICENSE("GPL v2");