1 // SPDX-License-Identifier: GPL-2.0-or-later 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 panel_init_cmd { 21 size_t len; 22 const char *data; 23 }; 24 25 #define _INIT_CMD(...) { \ 26 .len = sizeof((char[]){__VA_ARGS__}), \ 27 .data = (char[]){__VA_ARGS__} } 28 29 struct panel_desc { 30 const struct drm_display_mode *mode; 31 unsigned int bpc; 32 struct { 33 unsigned int width; 34 unsigned int height; 35 } size; 36 37 unsigned long flags; 38 enum mipi_dsi_pixel_format format; 39 const struct panel_init_cmd *init_cmds; 40 unsigned int lanes; 41 const char * const *supply_names; 42 unsigned int num_supplies; 43 unsigned int sleep_mode_delay; 44 unsigned int power_down_delay; 45 }; 46 47 struct innolux_panel { 48 struct drm_panel base; 49 struct mipi_dsi_device *link; 50 const struct panel_desc *desc; 51 52 struct regulator_bulk_data *supplies; 53 struct gpio_desc *enable_gpio; 54 55 bool prepared; 56 bool enabled; 57 }; 58 59 static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel) 60 { 61 return container_of(panel, struct innolux_panel, base); 62 } 63 64 static int innolux_panel_disable(struct drm_panel *panel) 65 { 66 struct innolux_panel *innolux = to_innolux_panel(panel); 67 68 if (!innolux->enabled) 69 return 0; 70 71 innolux->enabled = false; 72 73 return 0; 74 } 75 76 static int innolux_panel_unprepare(struct drm_panel *panel) 77 { 78 struct innolux_panel *innolux = to_innolux_panel(panel); 79 int err; 80 81 if (!innolux->prepared) 82 return 0; 83 84 err = mipi_dsi_dcs_set_display_off(innolux->link); 85 if (err < 0) 86 dev_err(panel->dev, "failed to set display off: %d\n", err); 87 88 err = mipi_dsi_dcs_enter_sleep_mode(innolux->link); 89 if (err < 0) { 90 dev_err(panel->dev, "failed to enter sleep mode: %d\n", err); 91 return err; 92 } 93 94 if (innolux->desc->sleep_mode_delay) 95 msleep(innolux->desc->sleep_mode_delay); 96 97 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 98 99 if (innolux->desc->power_down_delay) 100 msleep(innolux->desc->power_down_delay); 101 102 err = regulator_bulk_disable(innolux->desc->num_supplies, 103 innolux->supplies); 104 if (err < 0) 105 return err; 106 107 innolux->prepared = false; 108 109 return 0; 110 } 111 112 static int innolux_panel_prepare(struct drm_panel *panel) 113 { 114 struct innolux_panel *innolux = to_innolux_panel(panel); 115 int err; 116 117 if (innolux->prepared) 118 return 0; 119 120 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 121 122 err = regulator_bulk_enable(innolux->desc->num_supplies, 123 innolux->supplies); 124 if (err < 0) 125 return err; 126 127 /* p079zca: t2 (20ms), p097pfg: t4 (15ms) */ 128 usleep_range(20000, 21000); 129 130 gpiod_set_value_cansleep(innolux->enable_gpio, 1); 131 132 /* p079zca: t4, p097pfg: t5 */ 133 usleep_range(20000, 21000); 134 135 if (innolux->desc->init_cmds) { 136 const struct panel_init_cmd *cmds = 137 innolux->desc->init_cmds; 138 unsigned int i; 139 140 for (i = 0; cmds[i].len != 0; i++) { 141 const struct panel_init_cmd *cmd = &cmds[i]; 142 143 err = mipi_dsi_generic_write(innolux->link, cmd->data, 144 cmd->len); 145 if (err < 0) { 146 dev_err(panel->dev, "failed to write command %u\n", i); 147 goto poweroff; 148 } 149 150 /* 151 * Included by random guessing, because without this 152 * (or at least, some delay), the panel sometimes 153 * didn't appear to pick up the command sequence. 154 */ 155 err = mipi_dsi_dcs_nop(innolux->link); 156 if (err < 0) { 157 dev_err(panel->dev, "failed to send DCS nop: %d\n", err); 158 goto poweroff; 159 } 160 } 161 } 162 163 err = mipi_dsi_dcs_exit_sleep_mode(innolux->link); 164 if (err < 0) { 165 dev_err(panel->dev, "failed to exit sleep mode: %d\n", err); 166 goto poweroff; 167 } 168 169 /* T6: 120ms - 1000ms*/ 170 msleep(120); 171 172 err = mipi_dsi_dcs_set_display_on(innolux->link); 173 if (err < 0) { 174 dev_err(panel->dev, "failed to set display on: %d\n", err); 175 goto poweroff; 176 } 177 178 /* T7: 5ms */ 179 usleep_range(5000, 6000); 180 181 innolux->prepared = true; 182 183 return 0; 184 185 poweroff: 186 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 187 regulator_bulk_disable(innolux->desc->num_supplies, innolux->supplies); 188 189 return err; 190 } 191 192 static int innolux_panel_enable(struct drm_panel *panel) 193 { 194 struct innolux_panel *innolux = to_innolux_panel(panel); 195 196 if (innolux->enabled) 197 return 0; 198 199 innolux->enabled = true; 200 201 return 0; 202 } 203 204 static const char * const innolux_p079zca_supply_names[] = { 205 "power", 206 }; 207 208 static const struct drm_display_mode innolux_p079zca_mode = { 209 .clock = 56900, 210 .hdisplay = 768, 211 .hsync_start = 768 + 40, 212 .hsync_end = 768 + 40 + 40, 213 .htotal = 768 + 40 + 40 + 40, 214 .vdisplay = 1024, 215 .vsync_start = 1024 + 20, 216 .vsync_end = 1024 + 20 + 4, 217 .vtotal = 1024 + 20 + 4 + 20, 218 }; 219 220 static const struct panel_desc innolux_p079zca_panel_desc = { 221 .mode = &innolux_p079zca_mode, 222 .bpc = 8, 223 .size = { 224 .width = 120, 225 .height = 160, 226 }, 227 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 228 MIPI_DSI_MODE_LPM, 229 .format = MIPI_DSI_FMT_RGB888, 230 .lanes = 4, 231 .supply_names = innolux_p079zca_supply_names, 232 .num_supplies = ARRAY_SIZE(innolux_p079zca_supply_names), 233 .power_down_delay = 80, /* T8: 80ms - 1000ms */ 234 }; 235 236 static const char * const innolux_p097pfg_supply_names[] = { 237 "avdd", 238 "avee", 239 }; 240 241 static const struct drm_display_mode innolux_p097pfg_mode = { 242 .clock = 229000, 243 .hdisplay = 1536, 244 .hsync_start = 1536 + 100, 245 .hsync_end = 1536 + 100 + 24, 246 .htotal = 1536 + 100 + 24 + 100, 247 .vdisplay = 2048, 248 .vsync_start = 2048 + 100, 249 .vsync_end = 2048 + 100 + 2, 250 .vtotal = 2048 + 100 + 2 + 18, 251 }; 252 253 /* 254 * Display manufacturer failed to provide init sequencing according to 255 * https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/892065/ 256 * so the init sequence stems from a register dump of a working panel. 257 */ 258 static const struct panel_init_cmd innolux_p097pfg_init_cmds[] = { 259 /* page 0 */ 260 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x00), 261 _INIT_CMD(0xB1, 0xE8, 0x11), 262 _INIT_CMD(0xB2, 0x25, 0x02), 263 _INIT_CMD(0xB5, 0x08, 0x00), 264 _INIT_CMD(0xBC, 0x0F, 0x00), 265 _INIT_CMD(0xB8, 0x03, 0x06, 0x00, 0x00), 266 _INIT_CMD(0xBD, 0x01, 0x90, 0x14, 0x14), 267 _INIT_CMD(0x6F, 0x01), 268 _INIT_CMD(0xC0, 0x03), 269 _INIT_CMD(0x6F, 0x02), 270 _INIT_CMD(0xC1, 0x0D), 271 _INIT_CMD(0xD9, 0x01, 0x09, 0x70), 272 _INIT_CMD(0xC5, 0x12, 0x21, 0x00), 273 _INIT_CMD(0xBB, 0x93, 0x93), 274 275 /* page 1 */ 276 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x01), 277 _INIT_CMD(0xB3, 0x3C, 0x3C), 278 _INIT_CMD(0xB4, 0x0F, 0x0F), 279 _INIT_CMD(0xB9, 0x45, 0x45), 280 _INIT_CMD(0xBA, 0x14, 0x14), 281 _INIT_CMD(0xCA, 0x02), 282 _INIT_CMD(0xCE, 0x04), 283 _INIT_CMD(0xC3, 0x9B, 0x9B), 284 _INIT_CMD(0xD8, 0xC0, 0x03), 285 _INIT_CMD(0xBC, 0x82, 0x01), 286 _INIT_CMD(0xBD, 0x9E, 0x01), 287 288 /* page 2 */ 289 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x02), 290 _INIT_CMD(0xB0, 0x82), 291 _INIT_CMD(0xD1, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x82, 0x00, 0xA5, 292 0x00, 0xC1, 0x00, 0xEA, 0x01, 0x0D, 0x01, 0x40), 293 _INIT_CMD(0xD2, 0x01, 0x6A, 0x01, 0xA8, 0x01, 0xDC, 0x02, 0x29, 294 0x02, 0x67, 0x02, 0x68, 0x02, 0xA8, 0x02, 0xF0), 295 _INIT_CMD(0xD3, 0x03, 0x19, 0x03, 0x49, 0x03, 0x67, 0x03, 0x8C, 296 0x03, 0xA6, 0x03, 0xC7, 0x03, 0xDE, 0x03, 0xEC), 297 _INIT_CMD(0xD4, 0x03, 0xFF, 0x03, 0xFF), 298 _INIT_CMD(0xE0, 0x00, 0x00, 0x00, 0x86, 0x00, 0xC5, 0x00, 0xE5, 299 0x00, 0xFF, 0x01, 0x26, 0x01, 0x45, 0x01, 0x75), 300 _INIT_CMD(0xE1, 0x01, 0x9C, 0x01, 0xD5, 0x02, 0x05, 0x02, 0x4D, 301 0x02, 0x86, 0x02, 0x87, 0x02, 0xC3, 0x03, 0x03), 302 _INIT_CMD(0xE2, 0x03, 0x2A, 0x03, 0x56, 0x03, 0x72, 0x03, 0x94, 303 0x03, 0xAC, 0x03, 0xCB, 0x03, 0xE0, 0x03, 0xED), 304 _INIT_CMD(0xE3, 0x03, 0xFF, 0x03, 0xFF), 305 306 /* page 3 */ 307 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x03), 308 _INIT_CMD(0xB0, 0x00, 0x00, 0x00, 0x00), 309 _INIT_CMD(0xB1, 0x00, 0x00, 0x00, 0x00), 310 _INIT_CMD(0xB2, 0x00, 0x00, 0x06, 0x04, 0x01, 0x40, 0x85), 311 _INIT_CMD(0xB3, 0x10, 0x07, 0xFC, 0x04, 0x01, 0x40, 0x80), 312 _INIT_CMD(0xB6, 0xF0, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 313 0x40, 0x80), 314 _INIT_CMD(0xBA, 0xC5, 0x07, 0x00, 0x04, 0x11, 0x25, 0x8C), 315 _INIT_CMD(0xBB, 0xC5, 0x07, 0x00, 0x03, 0x11, 0x25, 0x8C), 316 _INIT_CMD(0xC0, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80), 317 _INIT_CMD(0xC1, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80), 318 _INIT_CMD(0xC4, 0x00, 0x00), 319 _INIT_CMD(0xEF, 0x41), 320 321 /* page 4 */ 322 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x04), 323 _INIT_CMD(0xEC, 0x4C), 324 325 /* page 5 */ 326 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x05), 327 _INIT_CMD(0xB0, 0x13, 0x03, 0x03, 0x01), 328 _INIT_CMD(0xB1, 0x30, 0x00), 329 _INIT_CMD(0xB2, 0x02, 0x02, 0x00), 330 _INIT_CMD(0xB3, 0x82, 0x23, 0x82, 0x9D), 331 _INIT_CMD(0xB4, 0xC5, 0x75, 0x24, 0x57), 332 _INIT_CMD(0xB5, 0x00, 0xD4, 0x72, 0x11, 0x11, 0xAB, 0x0A), 333 _INIT_CMD(0xB6, 0x00, 0x00, 0xD5, 0x72, 0x24, 0x56), 334 _INIT_CMD(0xB7, 0x5C, 0xDC, 0x5C, 0x5C), 335 _INIT_CMD(0xB9, 0x0C, 0x00, 0x00, 0x01, 0x00), 336 _INIT_CMD(0xC0, 0x75, 0x11, 0x11, 0x54, 0x05), 337 _INIT_CMD(0xC6, 0x00, 0x00, 0x00, 0x00), 338 _INIT_CMD(0xD0, 0x00, 0x48, 0x08, 0x00, 0x00), 339 _INIT_CMD(0xD1, 0x00, 0x48, 0x09, 0x00, 0x00), 340 341 /* page 6 */ 342 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x06), 343 _INIT_CMD(0xB0, 0x02, 0x32, 0x32, 0x08, 0x2F), 344 _INIT_CMD(0xB1, 0x2E, 0x15, 0x14, 0x13, 0x12), 345 _INIT_CMD(0xB2, 0x11, 0x10, 0x00, 0x3D, 0x3D), 346 _INIT_CMD(0xB3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 347 _INIT_CMD(0xB4, 0x3D, 0x32), 348 _INIT_CMD(0xB5, 0x03, 0x32, 0x32, 0x09, 0x2F), 349 _INIT_CMD(0xB6, 0x2E, 0x1B, 0x1A, 0x19, 0x18), 350 _INIT_CMD(0xB7, 0x17, 0x16, 0x01, 0x3D, 0x3D), 351 _INIT_CMD(0xB8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 352 _INIT_CMD(0xB9, 0x3D, 0x32), 353 _INIT_CMD(0xC0, 0x01, 0x32, 0x32, 0x09, 0x2F), 354 _INIT_CMD(0xC1, 0x2E, 0x1A, 0x1B, 0x16, 0x17), 355 _INIT_CMD(0xC2, 0x18, 0x19, 0x03, 0x3D, 0x3D), 356 _INIT_CMD(0xC3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 357 _INIT_CMD(0xC4, 0x3D, 0x32), 358 _INIT_CMD(0xC5, 0x00, 0x32, 0x32, 0x08, 0x2F), 359 _INIT_CMD(0xC6, 0x2E, 0x14, 0x15, 0x10, 0x11), 360 _INIT_CMD(0xC7, 0x12, 0x13, 0x02, 0x3D, 0x3D), 361 _INIT_CMD(0xC8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 362 _INIT_CMD(0xC9, 0x3D, 0x32), 363 364 {}, 365 }; 366 367 static const struct panel_desc innolux_p097pfg_panel_desc = { 368 .mode = &innolux_p097pfg_mode, 369 .bpc = 8, 370 .size = { 371 .width = 147, 372 .height = 196, 373 }, 374 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 375 MIPI_DSI_MODE_LPM, 376 .format = MIPI_DSI_FMT_RGB888, 377 .init_cmds = innolux_p097pfg_init_cmds, 378 .lanes = 4, 379 .supply_names = innolux_p097pfg_supply_names, 380 .num_supplies = ARRAY_SIZE(innolux_p097pfg_supply_names), 381 .sleep_mode_delay = 100, /* T15 */ 382 }; 383 384 static int innolux_panel_get_modes(struct drm_panel *panel, 385 struct drm_connector *connector) 386 { 387 struct innolux_panel *innolux = to_innolux_panel(panel); 388 const struct drm_display_mode *m = innolux->desc->mode; 389 struct drm_display_mode *mode; 390 391 mode = drm_mode_duplicate(connector->dev, m); 392 if (!mode) { 393 dev_err(panel->dev, "failed to add mode %ux%u@%u\n", 394 m->hdisplay, m->vdisplay, drm_mode_vrefresh(m)); 395 return -ENOMEM; 396 } 397 398 drm_mode_set_name(mode); 399 400 drm_mode_probed_add(connector, mode); 401 402 connector->display_info.width_mm = innolux->desc->size.width; 403 connector->display_info.height_mm = innolux->desc->size.height; 404 connector->display_info.bpc = innolux->desc->bpc; 405 406 return 1; 407 } 408 409 static const struct drm_panel_funcs innolux_panel_funcs = { 410 .disable = innolux_panel_disable, 411 .unprepare = innolux_panel_unprepare, 412 .prepare = innolux_panel_prepare, 413 .enable = innolux_panel_enable, 414 .get_modes = innolux_panel_get_modes, 415 }; 416 417 static const struct of_device_id innolux_of_match[] = { 418 { .compatible = "innolux,p079zca", 419 .data = &innolux_p079zca_panel_desc 420 }, 421 { .compatible = "innolux,p097pfg", 422 .data = &innolux_p097pfg_panel_desc 423 }, 424 { } 425 }; 426 MODULE_DEVICE_TABLE(of, innolux_of_match); 427 428 static int innolux_panel_add(struct mipi_dsi_device *dsi, 429 const struct panel_desc *desc) 430 { 431 struct innolux_panel *innolux; 432 struct device *dev = &dsi->dev; 433 int err, i; 434 435 innolux = devm_kzalloc(dev, sizeof(*innolux), GFP_KERNEL); 436 if (!innolux) 437 return -ENOMEM; 438 439 innolux->desc = desc; 440 441 innolux->supplies = devm_kcalloc(dev, desc->num_supplies, 442 sizeof(*innolux->supplies), 443 GFP_KERNEL); 444 if (!innolux->supplies) 445 return -ENOMEM; 446 447 for (i = 0; i < desc->num_supplies; i++) 448 innolux->supplies[i].supply = desc->supply_names[i]; 449 450 err = devm_regulator_bulk_get(dev, desc->num_supplies, 451 innolux->supplies); 452 if (err < 0) 453 return err; 454 455 innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable", 456 GPIOD_OUT_HIGH); 457 if (IS_ERR(innolux->enable_gpio)) { 458 err = PTR_ERR(innolux->enable_gpio); 459 dev_dbg(dev, "failed to get enable gpio: %d\n", err); 460 innolux->enable_gpio = NULL; 461 } 462 463 drm_panel_init(&innolux->base, dev, &innolux_panel_funcs, 464 DRM_MODE_CONNECTOR_DSI); 465 466 err = drm_panel_of_backlight(&innolux->base); 467 if (err) 468 return err; 469 470 drm_panel_add(&innolux->base); 471 472 mipi_dsi_set_drvdata(dsi, innolux); 473 innolux->link = dsi; 474 475 return 0; 476 } 477 478 static void innolux_panel_del(struct innolux_panel *innolux) 479 { 480 drm_panel_remove(&innolux->base); 481 } 482 483 static int innolux_panel_probe(struct mipi_dsi_device *dsi) 484 { 485 const struct panel_desc *desc; 486 struct innolux_panel *innolux; 487 int err; 488 489 desc = of_device_get_match_data(&dsi->dev); 490 dsi->mode_flags = desc->flags; 491 dsi->format = desc->format; 492 dsi->lanes = desc->lanes; 493 494 err = innolux_panel_add(dsi, desc); 495 if (err < 0) 496 return err; 497 498 err = mipi_dsi_attach(dsi); 499 if (err < 0) { 500 innolux = mipi_dsi_get_drvdata(dsi); 501 innolux_panel_del(innolux); 502 return err; 503 } 504 505 return 0; 506 } 507 508 static void innolux_panel_remove(struct mipi_dsi_device *dsi) 509 { 510 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); 511 int err; 512 513 err = drm_panel_unprepare(&innolux->base); 514 if (err < 0) 515 dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err); 516 517 err = drm_panel_disable(&innolux->base); 518 if (err < 0) 519 dev_err(&dsi->dev, "failed to disable panel: %d\n", err); 520 521 err = mipi_dsi_detach(dsi); 522 if (err < 0) 523 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); 524 525 innolux_panel_del(innolux); 526 } 527 528 static void innolux_panel_shutdown(struct mipi_dsi_device *dsi) 529 { 530 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); 531 532 drm_panel_unprepare(&innolux->base); 533 drm_panel_disable(&innolux->base); 534 } 535 536 static struct mipi_dsi_driver innolux_panel_driver = { 537 .driver = { 538 .name = "panel-innolux-p079zca", 539 .of_match_table = innolux_of_match, 540 }, 541 .probe = innolux_panel_probe, 542 .remove = innolux_panel_remove, 543 .shutdown = innolux_panel_shutdown, 544 }; 545 module_mipi_dsi_driver(innolux_panel_driver); 546 547 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); 548 MODULE_AUTHOR("Lin Huang <hl@rock-chips.com>"); 549 MODULE_DESCRIPTION("Innolux P079ZCA panel driver"); 550 MODULE_LICENSE("GPL v2"); 551