drivers/gpu/drm/panel/panel-simple.c

   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");