1 /* 2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sub license, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the 12 * next paragraph) shall be included in all copies or substantial portions 13 * of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 */ 23 24 #include <linux/backlight.h> 25 #include <linux/gpio/consumer.h> 26 #include <linux/module.h> 27 #include <linux/of_platform.h> 28 #include <linux/platform_device.h> 29 #include <linux/regulator/consumer.h> 30 31 #include <drm/drmP.h> 32 #include <drm/drm_crtc.h> 33 #include <drm/drm_mipi_dsi.h> 34 #include <drm/drm_panel.h> 35 36 struct panel_desc { 37 const struct drm_display_mode *modes; 38 unsigned int num_modes; 39 40 struct { 41 unsigned int width; 42 unsigned int height; 43 } size; 44 }; 45 46 struct panel_simple { 47 struct drm_panel base; 48 bool enabled; 49 50 const struct panel_desc *desc; 51 52 struct backlight_device *backlight; 53 struct regulator *supply; 54 struct i2c_adapter *ddc; 55 56 struct gpio_desc *enable_gpio; 57 }; 58 59 static inline struct panel_simple *to_panel_simple(struct drm_panel *panel) 60 { 61 return container_of(panel, struct panel_simple, base); 62 } 63 64 static int panel_simple_get_fixed_modes(struct panel_simple *panel) 65 { 66 struct drm_connector *connector = panel->base.connector; 67 struct drm_device *drm = panel->base.drm; 68 struct drm_display_mode *mode; 69 unsigned int i, num = 0; 70 71 if (!panel->desc) 72 return 0; 73 74 for (i = 0; i < panel->desc->num_modes; i++) { 75 const struct drm_display_mode *m = &panel->desc->modes[i]; 76 77 mode = drm_mode_duplicate(drm, m); 78 if (!mode) { 79 dev_err(drm->dev, "failed to add mode %ux%u@%u\n", 80 m->hdisplay, m->vdisplay, m->vrefresh); 81 continue; 82 } 83 84 drm_mode_set_name(mode); 85 86 drm_mode_probed_add(connector, mode); 87 num++; 88 } 89 90 connector->display_info.width_mm = panel->desc->size.width; 91 connector->display_info.height_mm = panel->desc->size.height; 92 93 return num; 94 } 95 96 static int panel_simple_disable(struct drm_panel *panel) 97 { 98 struct panel_simple *p = to_panel_simple(panel); 99 100 if (!p->enabled) 101 return 0; 102 103 if (p->backlight) { 104 p->backlight->props.power = FB_BLANK_POWERDOWN; 105 backlight_update_status(p->backlight); 106 } 107 108 if (p->enable_gpio) 109 gpiod_set_value_cansleep(p->enable_gpio, 0); 110 111 regulator_disable(p->supply); 112 p->enabled = false; 113 114 return 0; 115 } 116 117 static int panel_simple_enable(struct drm_panel *panel) 118 { 119 struct panel_simple *p = to_panel_simple(panel); 120 int err; 121 122 if (p->enabled) 123 return 0; 124 125 err = regulator_enable(p->supply); 126 if (err < 0) { 127 dev_err(panel->dev, "failed to enable supply: %d\n", err); 128 return err; 129 } 130 131 if (p->enable_gpio) 132 gpiod_set_value_cansleep(p->enable_gpio, 1); 133 134 if (p->backlight) { 135 p->backlight->props.power = FB_BLANK_UNBLANK; 136 backlight_update_status(p->backlight); 137 } 138 139 p->enabled = true; 140 141 return 0; 142 } 143 144 static int panel_simple_get_modes(struct drm_panel *panel) 145 { 146 struct panel_simple *p = to_panel_simple(panel); 147 int num = 0; 148 149 /* probe EDID if a DDC bus is available */ 150 if (p->ddc) { 151 struct edid *edid = drm_get_edid(panel->connector, p->ddc); 152 drm_mode_connector_update_edid_property(panel->connector, edid); 153 if (edid) { 154 num += drm_add_edid_modes(panel->connector, edid); 155 kfree(edid); 156 } 157 } 158 159 /* add hard-coded panel modes */ 160 num += panel_simple_get_fixed_modes(p); 161 162 return num; 163 } 164 165 static const struct drm_panel_funcs panel_simple_funcs = { 166 .disable = panel_simple_disable, 167 .enable = panel_simple_enable, 168 .get_modes = panel_simple_get_modes, 169 }; 170 171 static int panel_simple_probe(struct device *dev, const struct panel_desc *desc) 172 { 173 struct device_node *backlight, *ddc; 174 struct panel_simple *panel; 175 int err; 176 177 panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); 178 if (!panel) 179 return -ENOMEM; 180 181 panel->enabled = false; 182 panel->desc = desc; 183 184 panel->supply = devm_regulator_get(dev, "power"); 185 if (IS_ERR(panel->supply)) 186 return PTR_ERR(panel->supply); 187 188 panel->enable_gpio = devm_gpiod_get(dev, "enable"); 189 if (IS_ERR(panel->enable_gpio)) { 190 err = PTR_ERR(panel->enable_gpio); 191 if (err != -ENOENT) { 192 dev_err(dev, "failed to request GPIO: %d\n", err); 193 return err; 194 } 195 196 panel->enable_gpio = NULL; 197 } else { 198 err = gpiod_direction_output(panel->enable_gpio, 0); 199 if (err < 0) { 200 dev_err(dev, "failed to setup GPIO: %d\n", err); 201 return err; 202 } 203 } 204 205 backlight = of_parse_phandle(dev->of_node, "backlight", 0); 206 if (backlight) { 207 panel->backlight = of_find_backlight_by_node(backlight); 208 of_node_put(backlight); 209 210 if (!panel->backlight) 211 return -EPROBE_DEFER; 212 } 213 214 ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); 215 if (ddc) { 216 panel->ddc = of_find_i2c_adapter_by_node(ddc); 217 of_node_put(ddc); 218 219 if (!panel->ddc) { 220 err = -EPROBE_DEFER; 221 goto free_backlight; 222 } 223 } 224 225 drm_panel_init(&panel->base); 226 panel->base.dev = dev; 227 panel->base.funcs = &panel_simple_funcs; 228 229 err = drm_panel_add(&panel->base); 230 if (err < 0) 231 goto free_ddc; 232 233 dev_set_drvdata(dev, panel); 234 235 return 0; 236 237 free_ddc: 238 if (panel->ddc) 239 put_device(&panel->ddc->dev); 240 free_backlight: 241 if (panel->backlight) 242 put_device(&panel->backlight->dev); 243 244 return err; 245 } 246 247 static int panel_simple_remove(struct device *dev) 248 { 249 struct panel_simple *panel = dev_get_drvdata(dev); 250 251 drm_panel_detach(&panel->base); 252 drm_panel_remove(&panel->base); 253 254 panel_simple_disable(&panel->base); 255 256 if (panel->ddc) 257 put_device(&panel->ddc->dev); 258 259 if (panel->backlight) 260 put_device(&panel->backlight->dev); 261 262 return 0; 263 } 264 265 static const struct drm_display_mode auo_b101aw03_mode = { 266 .clock = 51450, 267 .hdisplay = 1024, 268 .hsync_start = 1024 + 156, 269 .hsync_end = 1024 + 156 + 8, 270 .htotal = 1024 + 156 + 8 + 156, 271 .vdisplay = 600, 272 .vsync_start = 600 + 16, 273 .vsync_end = 600 + 16 + 6, 274 .vtotal = 600 + 16 + 6 + 16, 275 .vrefresh = 60, 276 }; 277 278 static const struct panel_desc auo_b101aw03 = { 279 .modes = &auo_b101aw03_mode, 280 .num_modes = 1, 281 .size = { 282 .width = 223, 283 .height = 125, 284 }, 285 }; 286 287 static const struct drm_display_mode chunghwa_claa101wa01a_mode = { 288 .clock = 72070, 289 .hdisplay = 1366, 290 .hsync_start = 1366 + 58, 291 .hsync_end = 1366 + 58 + 58, 292 .htotal = 1366 + 58 + 58 + 58, 293 .vdisplay = 768, 294 .vsync_start = 768 + 4, 295 .vsync_end = 768 + 4 + 4, 296 .vtotal = 768 + 4 + 4 + 4, 297 .vrefresh = 60, 298 }; 299 300 static const struct panel_desc chunghwa_claa101wa01a = { 301 .modes = &chunghwa_claa101wa01a_mode, 302 .num_modes = 1, 303 .size = { 304 .width = 220, 305 .height = 120, 306 }, 307 }; 308 309 static const struct drm_display_mode chunghwa_claa101wb01_mode = { 310 .clock = 69300, 311 .hdisplay = 1366, 312 .hsync_start = 1366 + 48, 313 .hsync_end = 1366 + 48 + 32, 314 .htotal = 1366 + 48 + 32 + 20, 315 .vdisplay = 768, 316 .vsync_start = 768 + 16, 317 .vsync_end = 768 + 16 + 8, 318 .vtotal = 768 + 16 + 8 + 16, 319 .vrefresh = 60, 320 }; 321 322 static const struct panel_desc chunghwa_claa101wb01 = { 323 .modes = &chunghwa_claa101wb01_mode, 324 .num_modes = 1, 325 .size = { 326 .width = 223, 327 .height = 125, 328 }, 329 }; 330 331 static const struct drm_display_mode lg_lp129qe_mode = { 332 .clock = 285250, 333 .hdisplay = 2560, 334 .hsync_start = 2560 + 48, 335 .hsync_end = 2560 + 48 + 32, 336 .htotal = 2560 + 48 + 32 + 80, 337 .vdisplay = 1700, 338 .vsync_start = 1700 + 3, 339 .vsync_end = 1700 + 3 + 10, 340 .vtotal = 1700 + 3 + 10 + 36, 341 .vrefresh = 60, 342 }; 343 344 static const struct panel_desc lg_lp129qe = { 345 .modes = &lg_lp129qe_mode, 346 .num_modes = 1, 347 .size = { 348 .width = 272, 349 .height = 181, 350 }, 351 }; 352 353 static const struct drm_display_mode samsung_ltn101nt05_mode = { 354 .clock = 54030, 355 .hdisplay = 1024, 356 .hsync_start = 1024 + 24, 357 .hsync_end = 1024 + 24 + 136, 358 .htotal = 1024 + 24 + 136 + 160, 359 .vdisplay = 600, 360 .vsync_start = 600 + 3, 361 .vsync_end = 600 + 3 + 6, 362 .vtotal = 600 + 3 + 6 + 61, 363 .vrefresh = 60, 364 }; 365 366 static const struct panel_desc samsung_ltn101nt05 = { 367 .modes = &samsung_ltn101nt05_mode, 368 .num_modes = 1, 369 .size = { 370 .width = 1024, 371 .height = 600, 372 }, 373 }; 374 375 static const struct of_device_id platform_of_match[] = { 376 { 377 .compatible = "auo,b101aw03", 378 .data = &auo_b101aw03, 379 }, { 380 .compatible = "chunghwa,claa101wa01a", 381 .data = &chunghwa_claa101wa01a 382 }, { 383 .compatible = "chunghwa,claa101wb01", 384 .data = &chunghwa_claa101wb01 385 }, { 386 .compatible = "lg,lp129qe", 387 .data = &lg_lp129qe, 388 }, { 389 .compatible = "samsung,ltn101nt05", 390 .data = &samsung_ltn101nt05, 391 }, { 392 .compatible = "simple-panel", 393 }, { 394 /* sentinel */ 395 } 396 }; 397 MODULE_DEVICE_TABLE(of, platform_of_match); 398 399 static int panel_simple_platform_probe(struct platform_device *pdev) 400 { 401 const struct of_device_id *id; 402 403 id = of_match_node(platform_of_match, pdev->dev.of_node); 404 if (!id) 405 return -ENODEV; 406 407 return panel_simple_probe(&pdev->dev, id->data); 408 } 409 410 static int panel_simple_platform_remove(struct platform_device *pdev) 411 { 412 return panel_simple_remove(&pdev->dev); 413 } 414 415 static struct platform_driver panel_simple_platform_driver = { 416 .driver = { 417 .name = "panel-simple", 418 .owner = THIS_MODULE, 419 .of_match_table = platform_of_match, 420 }, 421 .probe = panel_simple_platform_probe, 422 .remove = panel_simple_platform_remove, 423 }; 424 425 struct panel_desc_dsi { 426 struct panel_desc desc; 427 428 unsigned long flags; 429 enum mipi_dsi_pixel_format format; 430 unsigned int lanes; 431 }; 432 433 static const struct drm_display_mode lg_ld070wx3_sl01_mode = { 434 .clock = 71000, 435 .hdisplay = 800, 436 .hsync_start = 800 + 32, 437 .hsync_end = 800 + 32 + 1, 438 .htotal = 800 + 32 + 1 + 57, 439 .vdisplay = 1280, 440 .vsync_start = 1280 + 28, 441 .vsync_end = 1280 + 28 + 1, 442 .vtotal = 1280 + 28 + 1 + 14, 443 .vrefresh = 60, 444 }; 445 446 static const struct panel_desc_dsi lg_ld070wx3_sl01 = { 447 .desc = { 448 .modes = &lg_ld070wx3_sl01_mode, 449 .num_modes = 1, 450 .size = { 451 .width = 94, 452 .height = 151, 453 }, 454 }, 455 .flags = MIPI_DSI_MODE_VIDEO, 456 .format = MIPI_DSI_FMT_RGB888, 457 .lanes = 4, 458 }; 459 460 static const struct drm_display_mode lg_lh500wx1_sd03_mode = { 461 .clock = 67000, 462 .hdisplay = 720, 463 .hsync_start = 720 + 12, 464 .hsync_end = 720 + 12 + 4, 465 .htotal = 720 + 12 + 4 + 112, 466 .vdisplay = 1280, 467 .vsync_start = 1280 + 8, 468 .vsync_end = 1280 + 8 + 4, 469 .vtotal = 1280 + 8 + 4 + 12, 470 .vrefresh = 60, 471 }; 472 473 static const struct panel_desc_dsi lg_lh500wx1_sd03 = { 474 .desc = { 475 .modes = &lg_lh500wx1_sd03_mode, 476 .num_modes = 1, 477 .size = { 478 .width = 62, 479 .height = 110, 480 }, 481 }, 482 .flags = MIPI_DSI_MODE_VIDEO, 483 .format = MIPI_DSI_FMT_RGB888, 484 .lanes = 4, 485 }; 486 487 static const struct drm_display_mode panasonic_vvx10f004b00_mode = { 488 .clock = 157200, 489 .hdisplay = 1920, 490 .hsync_start = 1920 + 154, 491 .hsync_end = 1920 + 154 + 16, 492 .htotal = 1920 + 154 + 16 + 32, 493 .vdisplay = 1200, 494 .vsync_start = 1200 + 17, 495 .vsync_end = 1200 + 17 + 2, 496 .vtotal = 1200 + 17 + 2 + 16, 497 .vrefresh = 60, 498 }; 499 500 static const struct panel_desc_dsi panasonic_vvx10f004b00 = { 501 .desc = { 502 .modes = &panasonic_vvx10f004b00_mode, 503 .num_modes = 1, 504 .size = { 505 .width = 217, 506 .height = 136, 507 }, 508 }, 509 .flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE, 510 .format = MIPI_DSI_FMT_RGB888, 511 .lanes = 4, 512 }; 513 514 static const struct of_device_id dsi_of_match[] = { 515 { 516 .compatible = "lg,ld070wx3-sl01", 517 .data = &lg_ld070wx3_sl01 518 }, { 519 .compatible = "lg,lh500wx1-sd03", 520 .data = &lg_lh500wx1_sd03 521 }, { 522 .compatible = "panasonic,vvx10f004b00", 523 .data = &panasonic_vvx10f004b00 524 }, { 525 /* sentinel */ 526 } 527 }; 528 MODULE_DEVICE_TABLE(of, dsi_of_match); 529 530 static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi) 531 { 532 const struct panel_desc_dsi *desc; 533 const struct of_device_id *id; 534 int err; 535 536 id = of_match_node(dsi_of_match, dsi->dev.of_node); 537 if (!id) 538 return -ENODEV; 539 540 desc = id->data; 541 542 err = panel_simple_probe(&dsi->dev, &desc->desc); 543 if (err < 0) 544 return err; 545 546 dsi->mode_flags = desc->flags; 547 dsi->format = desc->format; 548 dsi->lanes = desc->lanes; 549 550 return mipi_dsi_attach(dsi); 551 } 552 553 static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi) 554 { 555 int err; 556 557 err = mipi_dsi_detach(dsi); 558 if (err < 0) 559 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); 560 561 return panel_simple_remove(&dsi->dev); 562 } 563 564 static struct mipi_dsi_driver panel_simple_dsi_driver = { 565 .driver = { 566 .name = "panel-simple-dsi", 567 .owner = THIS_MODULE, 568 .of_match_table = dsi_of_match, 569 }, 570 .probe = panel_simple_dsi_probe, 571 .remove = panel_simple_dsi_remove, 572 }; 573 574 static int __init panel_simple_init(void) 575 { 576 int err; 577 578 err = platform_driver_register(&panel_simple_platform_driver); 579 if (err < 0) 580 return err; 581 582 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) { 583 err = mipi_dsi_driver_register(&panel_simple_dsi_driver); 584 if (err < 0) 585 return err; 586 } 587 588 return 0; 589 } 590 module_init(panel_simple_init); 591 592 static void __exit panel_simple_exit(void) 593 { 594 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) 595 mipi_dsi_driver_unregister(&panel_simple_dsi_driver); 596 597 platform_driver_unregister(&panel_simple_platform_driver); 598 } 599 module_exit(panel_simple_exit); 600 601 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 602 MODULE_DESCRIPTION("DRM Driver for Simple Panels"); 603 MODULE_LICENSE("GPL and additional rights"); 604