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