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