1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd 4 */ 5 6 #include <linux/backlight.h> 7 #include <linux/delay.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/of_device.h> 12 #include <linux/regulator/consumer.h> 13 14 #include <video/mipi_display.h> 15 16 #include <drm/drm_crtc.h> 17 #include <drm/drm_device.h> 18 #include <drm/drm_mipi_dsi.h> 19 #include <drm/drm_modes.h> 20 #include <drm/drm_panel.h> 21 #include <drm/drm_print.h> 22 23 struct panel_init_cmd { 24 size_t len; 25 const char *data; 26 }; 27 28 #define _INIT_CMD(...) { \ 29 .len = sizeof((char[]){__VA_ARGS__}), \ 30 .data = (char[]){__VA_ARGS__} } 31 32 struct panel_desc { 33 const struct drm_display_mode *mode; 34 unsigned int bpc; 35 struct { 36 unsigned int width; 37 unsigned int height; 38 } size; 39 40 unsigned long flags; 41 enum mipi_dsi_pixel_format format; 42 const struct panel_init_cmd *init_cmds; 43 unsigned int lanes; 44 const char * const *supply_names; 45 unsigned int num_supplies; 46 unsigned int sleep_mode_delay; 47 unsigned int power_down_delay; 48 }; 49 50 struct innolux_panel { 51 struct drm_panel base; 52 struct mipi_dsi_device *link; 53 const struct panel_desc *desc; 54 55 struct backlight_device *backlight; 56 struct regulator_bulk_data *supplies; 57 struct gpio_desc *enable_gpio; 58 59 bool prepared; 60 bool enabled; 61 }; 62 63 static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel) 64 { 65 return container_of(panel, struct innolux_panel, base); 66 } 67 68 static int innolux_panel_disable(struct drm_panel *panel) 69 { 70 struct innolux_panel *innolux = to_innolux_panel(panel); 71 72 if (!innolux->enabled) 73 return 0; 74 75 backlight_disable(innolux->backlight); 76 77 innolux->enabled = false; 78 79 return 0; 80 } 81 82 static int innolux_panel_unprepare(struct drm_panel *panel) 83 { 84 struct innolux_panel *innolux = to_innolux_panel(panel); 85 int err; 86 87 if (!innolux->prepared) 88 return 0; 89 90 err = mipi_dsi_dcs_set_display_off(innolux->link); 91 if (err < 0) 92 DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n", 93 err); 94 95 err = mipi_dsi_dcs_enter_sleep_mode(innolux->link); 96 if (err < 0) { 97 DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n", 98 err); 99 return err; 100 } 101 102 if (innolux->desc->sleep_mode_delay) 103 msleep(innolux->desc->sleep_mode_delay); 104 105 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 106 107 if (innolux->desc->power_down_delay) 108 msleep(innolux->desc->power_down_delay); 109 110 err = regulator_bulk_disable(innolux->desc->num_supplies, 111 innolux->supplies); 112 if (err < 0) 113 return err; 114 115 innolux->prepared = false; 116 117 return 0; 118 } 119 120 static int innolux_panel_prepare(struct drm_panel *panel) 121 { 122 struct innolux_panel *innolux = to_innolux_panel(panel); 123 int err; 124 125 if (innolux->prepared) 126 return 0; 127 128 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 129 130 err = regulator_bulk_enable(innolux->desc->num_supplies, 131 innolux->supplies); 132 if (err < 0) 133 return err; 134 135 /* p079zca: t2 (20ms), p097pfg: t4 (15ms) */ 136 usleep_range(20000, 21000); 137 138 gpiod_set_value_cansleep(innolux->enable_gpio, 1); 139 140 /* p079zca: t4, p097pfg: t5 */ 141 usleep_range(20000, 21000); 142 143 if (innolux->desc->init_cmds) { 144 const struct panel_init_cmd *cmds = 145 innolux->desc->init_cmds; 146 unsigned int i; 147 148 for (i = 0; cmds[i].len != 0; i++) { 149 const struct panel_init_cmd *cmd = &cmds[i]; 150 151 err = mipi_dsi_generic_write(innolux->link, cmd->data, 152 cmd->len); 153 if (err < 0) { 154 dev_err(panel->dev, 155 "failed to write command %u\n", i); 156 goto poweroff; 157 } 158 159 /* 160 * Included by random guessing, because without this 161 * (or at least, some delay), the panel sometimes 162 * didn't appear to pick up the command sequence. 163 */ 164 err = mipi_dsi_dcs_nop(innolux->link); 165 if (err < 0) { 166 dev_err(panel->dev, 167 "failed to send DCS nop: %d\n", err); 168 goto poweroff; 169 } 170 } 171 } 172 173 err = mipi_dsi_dcs_exit_sleep_mode(innolux->link); 174 if (err < 0) { 175 DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n", 176 err); 177 goto poweroff; 178 } 179 180 /* T6: 120ms - 1000ms*/ 181 msleep(120); 182 183 err = mipi_dsi_dcs_set_display_on(innolux->link); 184 if (err < 0) { 185 DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n", 186 err); 187 goto poweroff; 188 } 189 190 /* T7: 5ms */ 191 usleep_range(5000, 6000); 192 193 innolux->prepared = true; 194 195 return 0; 196 197 poweroff: 198 gpiod_set_value_cansleep(innolux->enable_gpio, 0); 199 regulator_bulk_disable(innolux->desc->num_supplies, innolux->supplies); 200 201 return err; 202 } 203 204 static int innolux_panel_enable(struct drm_panel *panel) 205 { 206 struct innolux_panel *innolux = to_innolux_panel(panel); 207 int ret; 208 209 if (innolux->enabled) 210 return 0; 211 212 ret = backlight_enable(innolux->backlight); 213 if (ret) { 214 DRM_DEV_ERROR(panel->drm->dev, 215 "Failed to enable backlight %d\n", ret); 216 return ret; 217 } 218 219 innolux->enabled = true; 220 221 return 0; 222 } 223 224 static const char * const innolux_p079zca_supply_names[] = { 225 "power", 226 }; 227 228 static const struct drm_display_mode innolux_p079zca_mode = { 229 .clock = 56900, 230 .hdisplay = 768, 231 .hsync_start = 768 + 40, 232 .hsync_end = 768 + 40 + 40, 233 .htotal = 768 + 40 + 40 + 40, 234 .vdisplay = 1024, 235 .vsync_start = 1024 + 20, 236 .vsync_end = 1024 + 20 + 4, 237 .vtotal = 1024 + 20 + 4 + 20, 238 .vrefresh = 60, 239 }; 240 241 static const struct panel_desc innolux_p079zca_panel_desc = { 242 .mode = &innolux_p079zca_mode, 243 .bpc = 8, 244 .size = { 245 .width = 120, 246 .height = 160, 247 }, 248 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 249 MIPI_DSI_MODE_LPM, 250 .format = MIPI_DSI_FMT_RGB888, 251 .lanes = 4, 252 .supply_names = innolux_p079zca_supply_names, 253 .num_supplies = ARRAY_SIZE(innolux_p079zca_supply_names), 254 .power_down_delay = 80, /* T8: 80ms - 1000ms */ 255 }; 256 257 static const char * const innolux_p097pfg_supply_names[] = { 258 "avdd", 259 "avee", 260 }; 261 262 static const struct drm_display_mode innolux_p097pfg_mode = { 263 .clock = 229000, 264 .hdisplay = 1536, 265 .hsync_start = 1536 + 100, 266 .hsync_end = 1536 + 100 + 24, 267 .htotal = 1536 + 100 + 24 + 100, 268 .vdisplay = 2048, 269 .vsync_start = 2048 + 100, 270 .vsync_end = 2048 + 100 + 2, 271 .vtotal = 2048 + 100 + 2 + 18, 272 .vrefresh = 60, 273 }; 274 275 /* 276 * Display manufacturer failed to provide init sequencing according to 277 * https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/892065/ 278 * so the init sequence stems from a register dump of a working panel. 279 */ 280 static const struct panel_init_cmd innolux_p097pfg_init_cmds[] = { 281 /* page 0 */ 282 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x00), 283 _INIT_CMD(0xB1, 0xE8, 0x11), 284 _INIT_CMD(0xB2, 0x25, 0x02), 285 _INIT_CMD(0xB5, 0x08, 0x00), 286 _INIT_CMD(0xBC, 0x0F, 0x00), 287 _INIT_CMD(0xB8, 0x03, 0x06, 0x00, 0x00), 288 _INIT_CMD(0xBD, 0x01, 0x90, 0x14, 0x14), 289 _INIT_CMD(0x6F, 0x01), 290 _INIT_CMD(0xC0, 0x03), 291 _INIT_CMD(0x6F, 0x02), 292 _INIT_CMD(0xC1, 0x0D), 293 _INIT_CMD(0xD9, 0x01, 0x09, 0x70), 294 _INIT_CMD(0xC5, 0x12, 0x21, 0x00), 295 _INIT_CMD(0xBB, 0x93, 0x93), 296 297 /* page 1 */ 298 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x01), 299 _INIT_CMD(0xB3, 0x3C, 0x3C), 300 _INIT_CMD(0xB4, 0x0F, 0x0F), 301 _INIT_CMD(0xB9, 0x45, 0x45), 302 _INIT_CMD(0xBA, 0x14, 0x14), 303 _INIT_CMD(0xCA, 0x02), 304 _INIT_CMD(0xCE, 0x04), 305 _INIT_CMD(0xC3, 0x9B, 0x9B), 306 _INIT_CMD(0xD8, 0xC0, 0x03), 307 _INIT_CMD(0xBC, 0x82, 0x01), 308 _INIT_CMD(0xBD, 0x9E, 0x01), 309 310 /* page 2 */ 311 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x02), 312 _INIT_CMD(0xB0, 0x82), 313 _INIT_CMD(0xD1, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x82, 0x00, 0xA5, 314 0x00, 0xC1, 0x00, 0xEA, 0x01, 0x0D, 0x01, 0x40), 315 _INIT_CMD(0xD2, 0x01, 0x6A, 0x01, 0xA8, 0x01, 0xDC, 0x02, 0x29, 316 0x02, 0x67, 0x02, 0x68, 0x02, 0xA8, 0x02, 0xF0), 317 _INIT_CMD(0xD3, 0x03, 0x19, 0x03, 0x49, 0x03, 0x67, 0x03, 0x8C, 318 0x03, 0xA6, 0x03, 0xC7, 0x03, 0xDE, 0x03, 0xEC), 319 _INIT_CMD(0xD4, 0x03, 0xFF, 0x03, 0xFF), 320 _INIT_CMD(0xE0, 0x00, 0x00, 0x00, 0x86, 0x00, 0xC5, 0x00, 0xE5, 321 0x00, 0xFF, 0x01, 0x26, 0x01, 0x45, 0x01, 0x75), 322 _INIT_CMD(0xE1, 0x01, 0x9C, 0x01, 0xD5, 0x02, 0x05, 0x02, 0x4D, 323 0x02, 0x86, 0x02, 0x87, 0x02, 0xC3, 0x03, 0x03), 324 _INIT_CMD(0xE2, 0x03, 0x2A, 0x03, 0x56, 0x03, 0x72, 0x03, 0x94, 325 0x03, 0xAC, 0x03, 0xCB, 0x03, 0xE0, 0x03, 0xED), 326 _INIT_CMD(0xE3, 0x03, 0xFF, 0x03, 0xFF), 327 328 /* page 3 */ 329 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x03), 330 _INIT_CMD(0xB0, 0x00, 0x00, 0x00, 0x00), 331 _INIT_CMD(0xB1, 0x00, 0x00, 0x00, 0x00), 332 _INIT_CMD(0xB2, 0x00, 0x00, 0x06, 0x04, 0x01, 0x40, 0x85), 333 _INIT_CMD(0xB3, 0x10, 0x07, 0xFC, 0x04, 0x01, 0x40, 0x80), 334 _INIT_CMD(0xB6, 0xF0, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 335 0x40, 0x80), 336 _INIT_CMD(0xBA, 0xC5, 0x07, 0x00, 0x04, 0x11, 0x25, 0x8C), 337 _INIT_CMD(0xBB, 0xC5, 0x07, 0x00, 0x03, 0x11, 0x25, 0x8C), 338 _INIT_CMD(0xC0, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80), 339 _INIT_CMD(0xC1, 0x00, 0x3C, 0x00, 0x00, 0x00, 0x80, 0x80), 340 _INIT_CMD(0xC4, 0x00, 0x00), 341 _INIT_CMD(0xEF, 0x41), 342 343 /* page 4 */ 344 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x04), 345 _INIT_CMD(0xEC, 0x4C), 346 347 /* page 5 */ 348 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x05), 349 _INIT_CMD(0xB0, 0x13, 0x03, 0x03, 0x01), 350 _INIT_CMD(0xB1, 0x30, 0x00), 351 _INIT_CMD(0xB2, 0x02, 0x02, 0x00), 352 _INIT_CMD(0xB3, 0x82, 0x23, 0x82, 0x9D), 353 _INIT_CMD(0xB4, 0xC5, 0x75, 0x24, 0x57), 354 _INIT_CMD(0xB5, 0x00, 0xD4, 0x72, 0x11, 0x11, 0xAB, 0x0A), 355 _INIT_CMD(0xB6, 0x00, 0x00, 0xD5, 0x72, 0x24, 0x56), 356 _INIT_CMD(0xB7, 0x5C, 0xDC, 0x5C, 0x5C), 357 _INIT_CMD(0xB9, 0x0C, 0x00, 0x00, 0x01, 0x00), 358 _INIT_CMD(0xC0, 0x75, 0x11, 0x11, 0x54, 0x05), 359 _INIT_CMD(0xC6, 0x00, 0x00, 0x00, 0x00), 360 _INIT_CMD(0xD0, 0x00, 0x48, 0x08, 0x00, 0x00), 361 _INIT_CMD(0xD1, 0x00, 0x48, 0x09, 0x00, 0x00), 362 363 /* page 6 */ 364 _INIT_CMD(0xF0, 0x55, 0xAA, 0x52, 0x08, 0x06), 365 _INIT_CMD(0xB0, 0x02, 0x32, 0x32, 0x08, 0x2F), 366 _INIT_CMD(0xB1, 0x2E, 0x15, 0x14, 0x13, 0x12), 367 _INIT_CMD(0xB2, 0x11, 0x10, 0x00, 0x3D, 0x3D), 368 _INIT_CMD(0xB3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 369 _INIT_CMD(0xB4, 0x3D, 0x32), 370 _INIT_CMD(0xB5, 0x03, 0x32, 0x32, 0x09, 0x2F), 371 _INIT_CMD(0xB6, 0x2E, 0x1B, 0x1A, 0x19, 0x18), 372 _INIT_CMD(0xB7, 0x17, 0x16, 0x01, 0x3D, 0x3D), 373 _INIT_CMD(0xB8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 374 _INIT_CMD(0xB9, 0x3D, 0x32), 375 _INIT_CMD(0xC0, 0x01, 0x32, 0x32, 0x09, 0x2F), 376 _INIT_CMD(0xC1, 0x2E, 0x1A, 0x1B, 0x16, 0x17), 377 _INIT_CMD(0xC2, 0x18, 0x19, 0x03, 0x3D, 0x3D), 378 _INIT_CMD(0xC3, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 379 _INIT_CMD(0xC4, 0x3D, 0x32), 380 _INIT_CMD(0xC5, 0x00, 0x32, 0x32, 0x08, 0x2F), 381 _INIT_CMD(0xC6, 0x2E, 0x14, 0x15, 0x10, 0x11), 382 _INIT_CMD(0xC7, 0x12, 0x13, 0x02, 0x3D, 0x3D), 383 _INIT_CMD(0xC8, 0x3D, 0x3D, 0x3D, 0x3D, 0x3D), 384 _INIT_CMD(0xC9, 0x3D, 0x32), 385 386 {}, 387 }; 388 389 static const struct panel_desc innolux_p097pfg_panel_desc = { 390 .mode = &innolux_p097pfg_mode, 391 .bpc = 8, 392 .size = { 393 .width = 147, 394 .height = 196, 395 }, 396 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | 397 MIPI_DSI_MODE_LPM, 398 .format = MIPI_DSI_FMT_RGB888, 399 .init_cmds = innolux_p097pfg_init_cmds, 400 .lanes = 4, 401 .supply_names = innolux_p097pfg_supply_names, 402 .num_supplies = ARRAY_SIZE(innolux_p097pfg_supply_names), 403 .sleep_mode_delay = 100, /* T15 */ 404 }; 405 406 static int innolux_panel_get_modes(struct drm_panel *panel) 407 { 408 struct innolux_panel *innolux = to_innolux_panel(panel); 409 const struct drm_display_mode *m = innolux->desc->mode; 410 struct drm_display_mode *mode; 411 412 mode = drm_mode_duplicate(panel->drm, m); 413 if (!mode) { 414 DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n", 415 m->hdisplay, m->vdisplay, m->vrefresh); 416 return -ENOMEM; 417 } 418 419 drm_mode_set_name(mode); 420 421 drm_mode_probed_add(panel->connector, mode); 422 423 panel->connector->display_info.width_mm = 424 innolux->desc->size.width; 425 panel->connector->display_info.height_mm = 426 innolux->desc->size.height; 427 panel->connector->display_info.bpc = innolux->desc->bpc; 428 429 return 1; 430 } 431 432 static const struct drm_panel_funcs innolux_panel_funcs = { 433 .disable = innolux_panel_disable, 434 .unprepare = innolux_panel_unprepare, 435 .prepare = innolux_panel_prepare, 436 .enable = innolux_panel_enable, 437 .get_modes = innolux_panel_get_modes, 438 }; 439 440 static const struct of_device_id innolux_of_match[] = { 441 { .compatible = "innolux,p079zca", 442 .data = &innolux_p079zca_panel_desc 443 }, 444 { .compatible = "innolux,p097pfg", 445 .data = &innolux_p097pfg_panel_desc 446 }, 447 { } 448 }; 449 MODULE_DEVICE_TABLE(of, innolux_of_match); 450 451 static int innolux_panel_add(struct mipi_dsi_device *dsi, 452 const struct panel_desc *desc) 453 { 454 struct innolux_panel *innolux; 455 struct device *dev = &dsi->dev; 456 int err, i; 457 458 innolux = devm_kzalloc(dev, sizeof(*innolux), GFP_KERNEL); 459 if (!innolux) 460 return -ENOMEM; 461 462 innolux->desc = desc; 463 464 innolux->supplies = devm_kcalloc(dev, desc->num_supplies, 465 sizeof(*innolux->supplies), 466 GFP_KERNEL); 467 if (!innolux->supplies) 468 return -ENOMEM; 469 470 for (i = 0; i < desc->num_supplies; i++) 471 innolux->supplies[i].supply = desc->supply_names[i]; 472 473 err = devm_regulator_bulk_get(dev, desc->num_supplies, 474 innolux->supplies); 475 if (err < 0) 476 return err; 477 478 innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable", 479 GPIOD_OUT_HIGH); 480 if (IS_ERR(innolux->enable_gpio)) { 481 err = PTR_ERR(innolux->enable_gpio); 482 dev_dbg(dev, "failed to get enable gpio: %d\n", err); 483 innolux->enable_gpio = NULL; 484 } 485 486 innolux->backlight = devm_of_find_backlight(dev); 487 if (IS_ERR(innolux->backlight)) 488 return PTR_ERR(innolux->backlight); 489 490 drm_panel_init(&innolux->base, dev, &innolux_panel_funcs, 491 DRM_MODE_CONNECTOR_DSI); 492 493 err = drm_panel_add(&innolux->base); 494 if (err < 0) 495 return err; 496 497 mipi_dsi_set_drvdata(dsi, innolux); 498 innolux->link = dsi; 499 500 return 0; 501 } 502 503 static void innolux_panel_del(struct innolux_panel *innolux) 504 { 505 drm_panel_remove(&innolux->base); 506 } 507 508 static int innolux_panel_probe(struct mipi_dsi_device *dsi) 509 { 510 const struct panel_desc *desc; 511 int err; 512 513 desc = of_device_get_match_data(&dsi->dev); 514 dsi->mode_flags = desc->flags; 515 dsi->format = desc->format; 516 dsi->lanes = desc->lanes; 517 518 err = innolux_panel_add(dsi, desc); 519 if (err < 0) 520 return err; 521 522 return mipi_dsi_attach(dsi); 523 } 524 525 static int innolux_panel_remove(struct mipi_dsi_device *dsi) 526 { 527 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); 528 int err; 529 530 err = innolux_panel_unprepare(&innolux->base); 531 if (err < 0) 532 DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n", 533 err); 534 535 err = innolux_panel_disable(&innolux->base); 536 if (err < 0) 537 DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err); 538 539 err = mipi_dsi_detach(dsi); 540 if (err < 0) 541 DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", 542 err); 543 544 innolux_panel_del(innolux); 545 546 return 0; 547 } 548 549 static void innolux_panel_shutdown(struct mipi_dsi_device *dsi) 550 { 551 struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); 552 553 innolux_panel_unprepare(&innolux->base); 554 innolux_panel_disable(&innolux->base); 555 } 556 557 static struct mipi_dsi_driver innolux_panel_driver = { 558 .driver = { 559 .name = "panel-innolux-p079zca", 560 .of_match_table = innolux_of_match, 561 }, 562 .probe = innolux_panel_probe, 563 .remove = innolux_panel_remove, 564 .shutdown = innolux_panel_shutdown, 565 }; 566 module_mipi_dsi_driver(innolux_panel_driver); 567 568 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); 569 MODULE_AUTHOR("Lin Huang <hl@rock-chips.com>"); 570 MODULE_DESCRIPTION("Innolux P079ZCA panel driver"); 571 MODULE_LICENSE("GPL v2"); 572