drivers/gpu/drm/tilcdc/tilcdc_drv.c

   1 /*
   2  * Copyright (C) 2012 Texas Instruments
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /* LCDC DRM driver, based on da8xx-fb */
  19
  20 #include "tilcdc_drv.h"
  21 #include "tilcdc_regs.h"
  22 #include "tilcdc_tfp410.h"
  23 #include "tilcdc_slave.h"
  24 #include "tilcdc_panel.h"
  25
  26 #include "drm_fb_helper.h"
  27
  28 static LIST_HEAD(module_list);
  29 static bool slave_probing;
  30
  31 void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
  32                 const struct tilcdc_module_ops *funcs)
  33 {
  34         mod->name = name;
  35         mod->funcs = funcs;
  36         INIT_LIST_HEAD(&mod->list);
  37         list_add(&mod->list, &module_list);
  38 }
  39
  40 void tilcdc_module_cleanup(struct tilcdc_module *mod)
  41 {
  42         list_del(&mod->list);
  43 }
  44
  45 void tilcdc_slave_probedefer(bool defered)
  46 {
  47         slave_probing = defered;
  48 }
  49
  50 static struct of_device_id tilcdc_of_match[];
  51
  52 static struct drm_framebuffer *tilcdc_fb_create(struct drm_device *dev,
  53                 struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd)
  54 {
  55         return drm_fb_cma_create(dev, file_priv, mode_cmd);
  56 }
  57
  58 static void tilcdc_fb_output_poll_changed(struct drm_device *dev)
  59 {
  60         struct tilcdc_drm_private *priv = dev->dev_private;
  61         if (priv->fbdev)
  62                 drm_fbdev_cma_hotplug_event(priv->fbdev);
  63 }
  64
  65 static const struct drm_mode_config_funcs mode_config_funcs = {
  66         .fb_create = tilcdc_fb_create,
  67         .output_poll_changed = tilcdc_fb_output_poll_changed,
  68 };
  69
  70 static int modeset_init(struct drm_device *dev)
  71 {
  72         struct tilcdc_drm_private *priv = dev->dev_private;
  73         struct tilcdc_module *mod;
  74
  75         drm_mode_config_init(dev);
  76
  77         priv->crtc = tilcdc_crtc_create(dev);
  78
  79         list_for_each_entry(mod, &module_list, list) {
  80                 DBG("loading module: %s", mod->name);
  81                 mod->funcs->modeset_init(mod, dev);
  82         }
  83
  84         if ((priv->num_encoders == 0) || (priv->num_connectors == 0)) {
  85                 /* oh nos! */
  86                 dev_err(dev->dev, "no encoders/connectors found\n");
  87                 return -ENXIO;
  88         }
  89
  90         dev->mode_config.min_width = 0;
  91         dev->mode_config.min_height = 0;
  92         dev->mode_config.max_width = tilcdc_crtc_max_width(priv->crtc);
  93         dev->mode_config.max_height = 2048;
  94         dev->mode_config.funcs = &mode_config_funcs;
  95
  96         return 0;
  97 }
  98
  99 #ifdef CONFIG_CPU_FREQ
 100 static int cpufreq_transition(struct notifier_block *nb,
 101                                      unsigned long val, void *data)
 102 {
 103         struct tilcdc_drm_private *priv = container_of(nb,
 104                         struct tilcdc_drm_private, freq_transition);
 105         if (val == CPUFREQ_POSTCHANGE) {
 106                 if (priv->lcd_fck_rate != clk_get_rate(priv->clk)) {
 107                         priv->lcd_fck_rate = clk_get_rate(priv->clk);
 108                         tilcdc_crtc_update_clk(priv->crtc);
 109                 }
 110         }
 111
 112         return 0;
 113 }
 114 #endif
 115
 116 /*
 117  * DRM operations:
 118  */
 119
 120 static int tilcdc_unload(struct drm_device *dev)
 121 {
 122         struct tilcdc_drm_private *priv = dev->dev_private;
 123
 124         drm_fbdev_cma_fini(priv->fbdev);
 125         drm_kms_helper_poll_fini(dev);
 126         drm_mode_config_cleanup(dev);
 127         drm_vblank_cleanup(dev);
 128
 129         pm_runtime_get_sync(dev->dev);
 130         drm_irq_uninstall(dev);
 131         pm_runtime_put_sync(dev->dev);
 132
 133 #ifdef CONFIG_CPU_FREQ
 134         cpufreq_unregister_notifier(&priv->freq_transition,
 135                         CPUFREQ_TRANSITION_NOTIFIER);
 136 #endif
 137
 138         if (priv->clk)
 139                 clk_put(priv->clk);
 140
 141         if (priv->mmio)
 142                 iounmap(priv->mmio);
 143
 144         flush_workqueue(priv->wq);
 145         destroy_workqueue(priv->wq);
 146
 147         dev->dev_private = NULL;
 148
 149         pm_runtime_disable(dev->dev);
 150
 151         kfree(priv);
 152
 153         return 0;
 154 }
 155
 156 static int tilcdc_load(struct drm_device *dev, unsigned long flags)
 157 {
 158         struct platform_device *pdev = dev->platformdev;
 159         struct device_node *node = pdev->dev.of_node;
 160         struct tilcdc_drm_private *priv;
 161         struct tilcdc_module *mod;
 162         struct resource *res;
 163         u32 bpp = 0;
 164         int ret;
 165
 166         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 167         if (!priv) {
 168                 dev_err(dev->dev, "failed to allocate private data\n");
 169                 return -ENOMEM;
 170         }
 171
 172         dev->dev_private = priv;
 173
 174         priv->wq = alloc_ordered_workqueue("tilcdc", 0);
 175
 176         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 177         if (!res) {
 178                 dev_err(dev->dev, "failed to get memory resource\n");
 179                 ret = -EINVAL;
 180                 goto fail;
 181         }
 182
 183         priv->mmio = ioremap_nocache(res->start, resource_size(res));
 184         if (!priv->mmio) {
 185                 dev_err(dev->dev, "failed to ioremap\n");
 186                 ret = -ENOMEM;
 187                 goto fail;
 188         }
 189
 190         priv->clk = clk_get(dev->dev, "fck");
 191         if (IS_ERR(priv->clk)) {
 192                 dev_err(dev->dev, "failed to get functional clock\n");
 193                 ret = -ENODEV;
 194                 goto fail;
 195         }
 196
 197         priv->disp_clk = clk_get(dev->dev, "dpll_disp_ck");
 198         if (IS_ERR(priv->clk)) {
 199                 dev_err(dev->dev, "failed to get display clock\n");
 200                 ret = -ENODEV;
 201                 goto fail;
 202         }
 203
 204 #ifdef CONFIG_CPU_FREQ
 205         priv->lcd_fck_rate = clk_get_rate(priv->clk);
 206         priv->freq_transition.notifier_call = cpufreq_transition;
 207         ret = cpufreq_register_notifier(&priv->freq_transition,
 208                         CPUFREQ_TRANSITION_NOTIFIER);
 209         if (ret) {
 210                 dev_err(dev->dev, "failed to register cpufreq notifier\n");
 211                 goto fail;
 212         }
 213 #endif
 214
 215         if (of_property_read_u32(node, "max-bandwidth", &priv->max_bandwidth))
 216                 priv->max_bandwidth = TILCDC_DEFAULT_MAX_BANDWIDTH;
 217
 218         DBG("Maximum Bandwidth Value %d", priv->max_bandwidth);
 219
 220         if (of_property_read_u32(node, "ti,max-width", &priv->max_width))
 221                 priv->max_width = TILCDC_DEFAULT_MAX_WIDTH;
 222
 223         DBG("Maximum Horizontal Pixel Width Value %dpixels", priv->max_width);
 224
 225         if (of_property_read_u32(node, "ti,max-pixelclock",
 226                                         &priv->max_pixelclock))
 227                 priv->max_pixelclock = TILCDC_DEFAULT_MAX_PIXELCLOCK;
 228
 229         DBG("Maximum Pixel Clock Value %dKHz", priv->max_pixelclock);
 230
 231         pm_runtime_enable(dev->dev);
 232
 233         /* Determine LCD IP Version */
 234         pm_runtime_get_sync(dev->dev);
 235         switch (tilcdc_read(dev, LCDC_PID_REG)) {
 236         case 0x4c100102:
 237                 priv->rev = 1;
 238                 break;
 239         case 0x4f200800:
 240         case 0x4f201000:
 241                 priv->rev = 2;
 242                 break;
 243         default:
 244                 dev_warn(dev->dev, "Unknown PID Reg value 0x%08x, "
 245                                 "defaulting to LCD revision 1\n",
 246                                 tilcdc_read(dev, LCDC_PID_REG));
 247                 priv->rev = 1;
 248                 break;
 249         }
 250
 251         pm_runtime_put_sync(dev->dev);
 252
 253         ret = modeset_init(dev);
 254         if (ret < 0) {
 255                 dev_err(dev->dev, "failed to initialize mode setting\n");
 256                 goto fail;
 257         }
 258
 259         ret = drm_vblank_init(dev, 1);
 260         if (ret < 0) {
 261                 dev_err(dev->dev, "failed to initialize vblank\n");
 262                 goto fail;
 263         }
 264
 265         pm_runtime_get_sync(dev->dev);
 266         ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
 267         pm_runtime_put_sync(dev->dev);
 268         if (ret < 0) {
 269                 dev_err(dev->dev, "failed to install IRQ handler\n");
 270                 goto fail;
 271         }
 272
 273         platform_set_drvdata(pdev, dev);
 274
 275
 276         list_for_each_entry(mod, &module_list, list) {
 277                 DBG("%s: preferred_bpp: %d", mod->name, mod->preferred_bpp);
 278                 bpp = mod->preferred_bpp;
 279                 if (bpp > 0)
 280                         break;
 281         }
 282
 283         priv->fbdev = drm_fbdev_cma_init(dev, bpp,
 284                         dev->mode_config.num_crtc,
 285                         dev->mode_config.num_connector);
 286
 287         drm_kms_helper_poll_init(dev);
 288
 289         return 0;
 290
 291 fail:
 292         tilcdc_unload(dev);
 293         return ret;
 294 }
 295
 296 static void tilcdc_preclose(struct drm_device *dev, struct drm_file *file)
 297 {
 298         struct tilcdc_drm_private *priv = dev->dev_private;
 299
 300         tilcdc_crtc_cancel_page_flip(priv->crtc, file);
 301 }
 302
 303 static void tilcdc_lastclose(struct drm_device *dev)
 304 {
 305         struct tilcdc_drm_private *priv = dev->dev_private;
 306         drm_fbdev_cma_restore_mode(priv->fbdev);
 307 }
 308
 309 static irqreturn_t tilcdc_irq(int irq, void *arg)
 310 {
 311         struct drm_device *dev = arg;
 312         struct tilcdc_drm_private *priv = dev->dev_private;
 313         return tilcdc_crtc_irq(priv->crtc);
 314 }
 315
 316 static void tilcdc_irq_preinstall(struct drm_device *dev)
 317 {
 318         tilcdc_clear_irqstatus(dev, 0xffffffff);
 319 }
 320
 321 static int tilcdc_irq_postinstall(struct drm_device *dev)
 322 {
 323         struct tilcdc_drm_private *priv = dev->dev_private;
 324
 325         /* enable FIFO underflow irq: */
 326         if (priv->rev == 1)
 327                 tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_UNDERFLOW_INT_ENA);
 328         else
 329                 tilcdc_set(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_UNDERFLOW_INT_ENA);
 330
 331         return 0;
 332 }
 333
 334 static void tilcdc_irq_uninstall(struct drm_device *dev)
 335 {
 336         struct tilcdc_drm_private *priv = dev->dev_private;
 337
 338         /* disable irqs that we might have enabled: */
 339         if (priv->rev == 1) {
 340                 tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
 341                                 LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA);
 342                 tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_V1_END_OF_FRAME_INT_ENA);
 343         } else {
 344                 tilcdc_clear(dev, LCDC_INT_ENABLE_SET_REG,
 345                         LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
 346                         LCDC_V2_END_OF_FRAME0_INT_ENA | LCDC_V2_END_OF_FRAME1_INT_ENA |
 347                         LCDC_FRAME_DONE);
 348         }
 349
 350 }
 351
 352 static void enable_vblank(struct drm_device *dev, bool enable)
 353 {
 354         struct tilcdc_drm_private *priv = dev->dev_private;
 355         u32 reg, mask;
 356
 357         if (priv->rev == 1) {
 358                 reg = LCDC_DMA_CTRL_REG;
 359                 mask = LCDC_V1_END_OF_FRAME_INT_ENA;
 360         } else {
 361                 reg = LCDC_INT_ENABLE_SET_REG;
 362                 mask = LCDC_V2_END_OF_FRAME0_INT_ENA |
 363                         LCDC_V2_END_OF_FRAME1_INT_ENA | LCDC_FRAME_DONE;
 364         }
 365
 366         if (enable)
 367                 tilcdc_set(dev, reg, mask);
 368         else
 369                 tilcdc_clear(dev, reg, mask);
 370 }
 371
 372 static int tilcdc_enable_vblank(struct drm_device *dev, int crtc)
 373 {
 374         enable_vblank(dev, true);
 375         return 0;
 376 }
 377
 378 static void tilcdc_disable_vblank(struct drm_device *dev, int crtc)
 379 {
 380         enable_vblank(dev, false);
 381 }
 382
 383 #if defined(CONFIG_DEBUG_FS) || defined(CONFIG_PM_SLEEP)
 384 static const struct {
 385         const char *name;
 386         uint8_t  rev;
 387         uint8_t  save;
 388         uint32_t reg;
 389 } registers[] =         {
 390 #define REG(rev, save, reg) { #reg, rev, save, reg }
 391                 /* exists in revision 1: */
 392                 REG(1, false, LCDC_PID_REG),
 393                 REG(1, true,  LCDC_CTRL_REG),
 394                 REG(1, false, LCDC_STAT_REG),
 395                 REG(1, true,  LCDC_RASTER_CTRL_REG),
 396                 REG(1, true,  LCDC_RASTER_TIMING_0_REG),
 397                 REG(1, true,  LCDC_RASTER_TIMING_1_REG),
 398                 REG(1, true,  LCDC_RASTER_TIMING_2_REG),
 399                 REG(1, true,  LCDC_DMA_CTRL_REG),
 400                 REG(1, true,  LCDC_DMA_FB_BASE_ADDR_0_REG),
 401                 REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_0_REG),
 402                 REG(1, true,  LCDC_DMA_FB_BASE_ADDR_1_REG),
 403                 REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_1_REG),
 404                 /* new in revision 2: */
 405                 REG(2, false, LCDC_RAW_STAT_REG),
 406                 REG(2, false, LCDC_MASKED_STAT_REG),
 407                 REG(2, false, LCDC_INT_ENABLE_SET_REG),
 408                 REG(2, false, LCDC_INT_ENABLE_CLR_REG),
 409                 REG(2, false, LCDC_END_OF_INT_IND_REG),
 410                 REG(2, true,  LCDC_CLK_ENABLE_REG),
 411                 REG(2, true,  LCDC_INT_ENABLE_SET_REG),
 412 #undef REG
 413 };
 414 #endif
 415
 416 #ifdef CONFIG_DEBUG_FS
 417 static int tilcdc_regs_show(struct seq_file *m, void *arg)
 418 {
 419         struct drm_info_node *node = (struct drm_info_node *) m->private;
 420         struct drm_device *dev = node->minor->dev;
 421         struct tilcdc_drm_private *priv = dev->dev_private;
 422         unsigned i;
 423
 424         pm_runtime_get_sync(dev->dev);
 425
 426         seq_printf(m, "revision: %d\n", priv->rev);
 427
 428         for (i = 0; i < ARRAY_SIZE(registers); i++)
 429                 if (priv->rev >= registers[i].rev)
 430                         seq_printf(m, "%s:\t %08x\n", registers[i].name,
 431                                         tilcdc_read(dev, registers[i].reg));
 432
 433         pm_runtime_put_sync(dev->dev);
 434
 435         return 0;
 436 }
 437
 438 static int tilcdc_mm_show(struct seq_file *m, void *arg)
 439 {
 440         struct drm_info_node *node = (struct drm_info_node *) m->private;
 441         struct drm_device *dev = node->minor->dev;
 442         return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
 443 }
 444
 445 static struct drm_info_list tilcdc_debugfs_list[] = {
 446                 { "regs", tilcdc_regs_show, 0 },
 447                 { "mm",   tilcdc_mm_show,   0 },
 448                 { "fb",   drm_fb_cma_debugfs_show, 0 },
 449 };
 450
 451 static int tilcdc_debugfs_init(struct drm_minor *minor)
 452 {
 453         struct drm_device *dev = minor->dev;
 454         struct tilcdc_module *mod;
 455         int ret;
 456
 457         ret = drm_debugfs_create_files(tilcdc_debugfs_list,
 458                         ARRAY_SIZE(tilcdc_debugfs_list),
 459                         minor->debugfs_root, minor);
 460
 461         list_for_each_entry(mod, &module_list, list)
 462                 if (mod->funcs->debugfs_init)
 463                         mod->funcs->debugfs_init(mod, minor);
 464
 465         if (ret) {
 466                 dev_err(dev->dev, "could not install tilcdc_debugfs_list\n");
 467                 return ret;
 468         }
 469
 470         return ret;
 471 }
 472
 473 static void tilcdc_debugfs_cleanup(struct drm_minor *minor)
 474 {
 475         struct tilcdc_module *mod;
 476         drm_debugfs_remove_files(tilcdc_debugfs_list,
 477                         ARRAY_SIZE(tilcdc_debugfs_list), minor);
 478
 479         list_for_each_entry(mod, &module_list, list)
 480                 if (mod->funcs->debugfs_cleanup)
 481                         mod->funcs->debugfs_cleanup(mod, minor);
 482 }
 483 #endif
 484
 485 static const struct file_operations fops = {
 486         .owner              = THIS_MODULE,
 487         .open               = drm_open,
 488         .release            = drm_release,
 489         .unlocked_ioctl     = drm_ioctl,
 490 #ifdef CONFIG_COMPAT
 491         .compat_ioctl       = drm_compat_ioctl,
 492 #endif
 493         .poll               = drm_poll,
 494         .read               = drm_read,
 495         .llseek             = no_llseek,
 496         .mmap               = drm_gem_cma_mmap,
 497 };
 498
 499 static struct drm_driver tilcdc_driver = {
 500         .driver_features    = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
 501         .load               = tilcdc_load,
 502         .unload             = tilcdc_unload,
 503         .preclose           = tilcdc_preclose,
 504         .lastclose          = tilcdc_lastclose,
 505         .set_busid          = drm_platform_set_busid,
 506         .irq_handler        = tilcdc_irq,
 507         .irq_preinstall     = tilcdc_irq_preinstall,
 508         .irq_postinstall    = tilcdc_irq_postinstall,
 509         .irq_uninstall      = tilcdc_irq_uninstall,
 510         .get_vblank_counter = drm_vblank_count,
 511         .enable_vblank      = tilcdc_enable_vblank,
 512         .disable_vblank     = tilcdc_disable_vblank,
 513         .gem_free_object    = drm_gem_cma_free_object,
 514         .gem_vm_ops         = &drm_gem_cma_vm_ops,
 515         .dumb_create        = drm_gem_cma_dumb_create,
 516         .dumb_map_offset    = drm_gem_cma_dumb_map_offset,
 517         .dumb_destroy       = drm_gem_dumb_destroy,
 518 #ifdef CONFIG_DEBUG_FS
 519         .debugfs_init       = tilcdc_debugfs_init,
 520         .debugfs_cleanup    = tilcdc_debugfs_cleanup,
 521 #endif
 522         .fops               = &fops,
 523         .name               = "tilcdc",
 524         .desc               = "TI LCD Controller DRM",
 525         .date               = "20121205",
 526         .major              = 1,
 527         .minor              = 0,
 528 };
 529
 530 /*
 531  * Power management:
 532  */
 533
 534 #ifdef CONFIG_PM_SLEEP
 535 static int tilcdc_pm_suspend(struct device *dev)
 536 {
 537         struct drm_device *ddev = dev_get_drvdata(dev);
 538         struct tilcdc_drm_private *priv = ddev->dev_private;
 539         unsigned i, n = 0;
 540
 541         drm_kms_helper_poll_disable(ddev);
 542
 543         /* Save register state: */
 544         for (i = 0; i < ARRAY_SIZE(registers); i++)
 545                 if (registers[i].save && (priv->rev >= registers[i].rev))
 546                         priv->saved_register[n++] = tilcdc_read(ddev, registers[i].reg);
 547
 548         return 0;
 549 }
 550
 551 static int tilcdc_pm_resume(struct device *dev)
 552 {
 553         struct drm_device *ddev = dev_get_drvdata(dev);
 554         struct tilcdc_drm_private *priv = ddev->dev_private;
 555         unsigned i, n = 0;
 556
 557         /* Restore register state: */
 558         for (i = 0; i < ARRAY_SIZE(registers); i++)
 559                 if (registers[i].save && (priv->rev >= registers[i].rev))
 560                         tilcdc_write(ddev, registers[i].reg, priv->saved_register[n++]);
 561
 562         drm_kms_helper_poll_enable(ddev);
 563
 564         return 0;
 565 }
 566 #endif
 567
 568 static const struct dev_pm_ops tilcdc_pm_ops = {
 569         SET_SYSTEM_SLEEP_PM_OPS(tilcdc_pm_suspend, tilcdc_pm_resume)
 570 };
 571
 572 /*
 573  * Platform driver:
 574  */
 575
 576 static int tilcdc_pdev_probe(struct platform_device *pdev)
 577 {
 578         /* bail out early if no DT data: */
 579         if (!pdev->dev.of_node) {
 580                 dev_err(&pdev->dev, "device-tree data is missing\n");
 581                 return -ENXIO;
 582         }
 583
 584         /* defer probing if slave is in deferred probing */
 585         if (slave_probing == true)
 586                 return -EPROBE_DEFER;
 587
 588         return drm_platform_init(&tilcdc_driver, pdev);
 589 }
 590
 591 static int tilcdc_pdev_remove(struct platform_device *pdev)
 592 {
 593         drm_put_dev(platform_get_drvdata(pdev));
 594
 595         return 0;
 596 }
 597
 598 static struct of_device_id tilcdc_of_match[] = {
 599                 { .compatible = "ti,am33xx-tilcdc", },
 600                 { },
 601 };
 602 MODULE_DEVICE_TABLE(of, tilcdc_of_match);
 603
 604 static struct platform_driver tilcdc_platform_driver = {
 605         .probe      = tilcdc_pdev_probe,
 606         .remove     = tilcdc_pdev_remove,
 607         .driver     = {
 608                 .owner  = THIS_MODULE,
 609                 .name   = "tilcdc",
 610                 .pm     = &tilcdc_pm_ops,
 611                 .of_match_table = tilcdc_of_match,
 612         },
 613 };
 614
 615 static int __init tilcdc_drm_init(void)
 616 {
 617         DBG("init");
 618         tilcdc_tfp410_init();
 619         tilcdc_slave_init();
 620         tilcdc_panel_init();
 621         return platform_driver_register(&tilcdc_platform_driver);
 622 }
 623
 624 static void __exit tilcdc_drm_fini(void)
 625 {
 626         DBG("fini");
 627         platform_driver_unregister(&tilcdc_platform_driver);
 628         tilcdc_panel_fini();
 629         tilcdc_slave_fini();
 630         tilcdc_tfp410_fini();
 631 }
 632
 633 module_init(tilcdc_drm_init);
 634 module_exit(tilcdc_drm_fini);
 635
 636 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
 637 MODULE_DESCRIPTION("TI LCD Controller DRM Driver");
 638 MODULE_LICENSE("GPL");