drivers/gpu/drm/imx/imx-drm-core.c

   1 /*
   2  * Freescale i.MX drm driver
   3  *
   4  * Copyright (C) 2011 Sascha Hauer, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16 #include <linux/component.h>
  17 #include <linux/device.h>
  18 #include <linux/fb.h>
  19 #include <linux/module.h>
  20 #include <linux/of_graph.h>
  21 #include <linux/platform_device.h>
  22 #include <drm/drmP.h>
  23 #include <drm/drm_fb_helper.h>
  24 #include <drm/drm_crtc_helper.h>
  25 #include <drm/drm_gem_cma_helper.h>
  26 #include <drm/drm_fb_cma_helper.h>
  27 #include <drm/drm_plane_helper.h>
  28 #include <drm/drm_of.h>
  29
  30 #include "imx-drm.h"
  31
  32 #define MAX_CRTC        4
  33
  34 struct imx_drm_component {
  35         struct device_node *of_node;
  36         struct list_head list;
  37 };
  38
  39 struct imx_drm_device {
  40         struct drm_device                       *drm;
  41         struct imx_drm_crtc                     *crtc[MAX_CRTC];
  42         int                                     pipes;
  43         struct drm_fbdev_cma                    *fbhelper;
  44 };
  45
  46 struct imx_drm_crtc {
  47         struct drm_crtc                         *crtc;
  48         int                                     pipe;
  49         struct imx_drm_crtc_helper_funcs        imx_drm_helper_funcs;
  50 };
  51
  52 static int legacyfb_depth = 16;
  53 module_param(legacyfb_depth, int, 0444);
  54
  55 int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
  56 {
  57         return crtc->pipe;
  58 }
  59 EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
  60
  61 static void imx_drm_driver_lastclose(struct drm_device *drm)
  62 {
  63 #if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
  64         struct imx_drm_device *imxdrm = drm->dev_private;
  65
  66         if (imxdrm->fbhelper)
  67                 drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
  68 #endif
  69 }
  70
  71 static int imx_drm_driver_unload(struct drm_device *drm)
  72 {
  73 #if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
  74         struct imx_drm_device *imxdrm = drm->dev_private;
  75 #endif
  76
  77         drm_kms_helper_poll_fini(drm);
  78
  79 #if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
  80         if (imxdrm->fbhelper)
  81                 drm_fbdev_cma_fini(imxdrm->fbhelper);
  82 #endif
  83
  84         component_unbind_all(drm->dev, drm);
  85
  86         drm_vblank_cleanup(drm);
  87         drm_mode_config_cleanup(drm);
  88
  89         platform_set_drvdata(drm->platformdev, NULL);
  90
  91         return 0;
  92 }
  93
  94 static struct imx_drm_crtc *imx_drm_find_crtc(struct drm_crtc *crtc)
  95 {
  96         struct imx_drm_device *imxdrm = crtc->dev->dev_private;
  97         unsigned i;
  98
  99         for (i = 0; i < MAX_CRTC; i++)
 100                 if (imxdrm->crtc[i] && imxdrm->crtc[i]->crtc == crtc)
 101                         return imxdrm->crtc[i];
 102
 103         return NULL;
 104 }
 105
 106 int imx_drm_panel_format_pins(struct drm_encoder *encoder,
 107                 u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
 108 {
 109         struct imx_drm_crtc_helper_funcs *helper;
 110         struct imx_drm_crtc *imx_crtc;
 111
 112         imx_crtc = imx_drm_find_crtc(encoder->crtc);
 113         if (!imx_crtc)
 114                 return -EINVAL;
 115
 116         helper = &imx_crtc->imx_drm_helper_funcs;
 117         if (helper->set_interface_pix_fmt)
 118                 return helper->set_interface_pix_fmt(encoder->crtc,
 119                                 encoder->encoder_type, interface_pix_fmt,
 120                                 hsync_pin, vsync_pin);
 121         return 0;
 122 }
 123 EXPORT_SYMBOL_GPL(imx_drm_panel_format_pins);
 124
 125 int imx_drm_panel_format(struct drm_encoder *encoder, u32 interface_pix_fmt)
 126 {
 127         return imx_drm_panel_format_pins(encoder, interface_pix_fmt, 2, 3);
 128 }
 129 EXPORT_SYMBOL_GPL(imx_drm_panel_format);
 130
 131 int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
 132 {
 133         return drm_vblank_get(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
 134 }
 135 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
 136
 137 void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
 138 {
 139         drm_vblank_put(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
 140 }
 141 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
 142
 143 void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
 144 {
 145         drm_handle_vblank(imx_drm_crtc->crtc->dev, imx_drm_crtc->pipe);
 146 }
 147 EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
 148
 149 static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
 150 {
 151         struct imx_drm_device *imxdrm = drm->dev_private;
 152         struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
 153         int ret;
 154
 155         if (!imx_drm_crtc)
 156                 return -EINVAL;
 157
 158         if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
 159                 return -ENOSYS;
 160
 161         ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
 162                         imx_drm_crtc->crtc);
 163
 164         return ret;
 165 }
 166
 167 static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
 168 {
 169         struct imx_drm_device *imxdrm = drm->dev_private;
 170         struct imx_drm_crtc *imx_drm_crtc = imxdrm->crtc[crtc];
 171
 172         if (!imx_drm_crtc)
 173                 return;
 174
 175         if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
 176                 return;
 177
 178         imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
 179 }
 180
 181 static void imx_drm_driver_preclose(struct drm_device *drm,
 182                 struct drm_file *file)
 183 {
 184         int i;
 185
 186         if (!file->is_master)
 187                 return;
 188
 189         for (i = 0; i < MAX_CRTC; i++)
 190                 imx_drm_disable_vblank(drm, i);
 191 }
 192
 193 static const struct file_operations imx_drm_driver_fops = {
 194         .owner = THIS_MODULE,
 195         .open = drm_open,
 196         .release = drm_release,
 197         .unlocked_ioctl = drm_ioctl,
 198         .mmap = drm_gem_cma_mmap,
 199         .poll = drm_poll,
 200         .read = drm_read,
 201         .llseek = noop_llseek,
 202 };
 203
 204 void imx_drm_connector_destroy(struct drm_connector *connector)
 205 {
 206         drm_connector_unregister(connector);
 207         drm_connector_cleanup(connector);
 208 }
 209 EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
 210
 211 void imx_drm_encoder_destroy(struct drm_encoder *encoder)
 212 {
 213         drm_encoder_cleanup(encoder);
 214 }
 215 EXPORT_SYMBOL_GPL(imx_drm_encoder_destroy);
 216
 217 static void imx_drm_output_poll_changed(struct drm_device *drm)
 218 {
 219 #if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
 220         struct imx_drm_device *imxdrm = drm->dev_private;
 221
 222         drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
 223 #endif
 224 }
 225
 226 static struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
 227         .fb_create = drm_fb_cma_create,
 228         .output_poll_changed = imx_drm_output_poll_changed,
 229 };
 230
 231 /*
 232  * Main DRM initialisation. This binds, initialises and registers
 233  * with DRM the subcomponents of the driver.
 234  */
 235 static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
 236 {
 237         struct imx_drm_device *imxdrm;
 238         struct drm_connector *connector;
 239         int ret;
 240
 241         imxdrm = devm_kzalloc(drm->dev, sizeof(*imxdrm), GFP_KERNEL);
 242         if (!imxdrm)
 243                 return -ENOMEM;
 244
 245         imxdrm->drm = drm;
 246
 247         drm->dev_private = imxdrm;
 248
 249         /*
 250          * enable drm irq mode.
 251          * - with irq_enabled = true, we can use the vblank feature.
 252          *
 253          * P.S. note that we wouldn't use drm irq handler but
 254          *      just specific driver own one instead because
 255          *      drm framework supports only one irq handler and
 256          *      drivers can well take care of their interrupts
 257          */
 258         drm->irq_enabled = true;
 259
 260         /*
 261          * set max width and height as default value(4096x4096).
 262          * this value would be used to check framebuffer size limitation
 263          * at drm_mode_addfb().
 264          */
 265         drm->mode_config.min_width = 64;
 266         drm->mode_config.min_height = 64;
 267         drm->mode_config.max_width = 4096;
 268         drm->mode_config.max_height = 4096;
 269         drm->mode_config.funcs = &imx_drm_mode_config_funcs;
 270
 271         drm_mode_config_init(drm);
 272
 273         ret = drm_vblank_init(drm, MAX_CRTC);
 274         if (ret)
 275                 goto err_kms;
 276
 277         /*
 278          * with vblank_disable_allowed = true, vblank interrupt will be
 279          * disabled by drm timer once a current process gives up ownership
 280          * of vblank event. (after drm_vblank_put function is called)
 281          */
 282         drm->vblank_disable_allowed = true;
 283
 284         platform_set_drvdata(drm->platformdev, drm);
 285
 286         /* Now try and bind all our sub-components */
 287         ret = component_bind_all(drm->dev, drm);
 288         if (ret)
 289                 goto err_vblank;
 290
 291         /*
 292          * All components are now added, we can publish the connector sysfs
 293          * entries to userspace.  This will generate hotplug events and so
 294          * userspace will expect to be able to access DRM at this point.
 295          */
 296         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 297                 ret = drm_connector_register(connector);
 298                 if (ret) {
 299                         dev_err(drm->dev,
 300                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 301                                 connector->base.id,
 302                                 connector->name, ret);
 303                         goto err_unbind;
 304                 }
 305         }
 306
 307         /*
 308          * All components are now initialised, so setup the fb helper.
 309          * The fb helper takes copies of key hardware information, so the
 310          * crtcs/connectors/encoders must not change after this point.
 311          */
 312 #if IS_ENABLED(CONFIG_DRM_IMX_FB_HELPER)
 313         if (legacyfb_depth != 16 && legacyfb_depth != 32) {
 314                 dev_warn(drm->dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
 315                 legacyfb_depth = 16;
 316         }
 317         imxdrm->fbhelper = drm_fbdev_cma_init(drm, legacyfb_depth,
 318                                 drm->mode_config.num_crtc, MAX_CRTC);
 319         if (IS_ERR(imxdrm->fbhelper)) {
 320                 ret = PTR_ERR(imxdrm->fbhelper);
 321                 imxdrm->fbhelper = NULL;
 322                 goto err_unbind;
 323         }
 324 #endif
 325
 326         drm_kms_helper_poll_init(drm);
 327
 328         return 0;
 329
 330 err_unbind:
 331         component_unbind_all(drm->dev, drm);
 332 err_vblank:
 333         drm_vblank_cleanup(drm);
 334 err_kms:
 335         drm_mode_config_cleanup(drm);
 336
 337         return ret;
 338 }
 339
 340 /*
 341  * imx_drm_add_crtc - add a new crtc
 342  */
 343 int imx_drm_add_crtc(struct drm_device *drm, struct drm_crtc *crtc,
 344                 struct imx_drm_crtc **new_crtc,
 345                 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
 346                 struct device_node *port)
 347 {
 348         struct imx_drm_device *imxdrm = drm->dev_private;
 349         struct imx_drm_crtc *imx_drm_crtc;
 350         int ret;
 351
 352         /*
 353          * The vblank arrays are dimensioned by MAX_CRTC - we can't
 354          * pass IDs greater than this to those functions.
 355          */
 356         if (imxdrm->pipes >= MAX_CRTC)
 357                 return -EINVAL;
 358
 359         if (imxdrm->drm->open_count)
 360                 return -EBUSY;
 361
 362         imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
 363         if (!imx_drm_crtc)
 364                 return -ENOMEM;
 365
 366         imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
 367         imx_drm_crtc->pipe = imxdrm->pipes++;
 368         imx_drm_crtc->crtc = crtc;
 369
 370         crtc->port = port;
 371
 372         imxdrm->crtc[imx_drm_crtc->pipe] = imx_drm_crtc;
 373
 374         *new_crtc = imx_drm_crtc;
 375
 376         ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
 377         if (ret)
 378                 goto err_register;
 379
 380         drm_crtc_helper_add(crtc,
 381                         imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
 382
 383         drm_crtc_init(drm, crtc,
 384                         imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
 385
 386         return 0;
 387
 388 err_register:
 389         imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
 390         kfree(imx_drm_crtc);
 391         return ret;
 392 }
 393 EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
 394
 395 /*
 396  * imx_drm_remove_crtc - remove a crtc
 397  */
 398 int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
 399 {
 400         struct imx_drm_device *imxdrm = imx_drm_crtc->crtc->dev->dev_private;
 401
 402         drm_crtc_cleanup(imx_drm_crtc->crtc);
 403
 404         imxdrm->crtc[imx_drm_crtc->pipe] = NULL;
 405
 406         kfree(imx_drm_crtc);
 407
 408         return 0;
 409 }
 410 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
 411
 412 int imx_drm_encoder_parse_of(struct drm_device *drm,
 413         struct drm_encoder *encoder, struct device_node *np)
 414 {
 415         uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
 416
 417         /*
 418          * If we failed to find the CRTC(s) which this encoder is
 419          * supposed to be connected to, it's because the CRTC has
 420          * not been registered yet.  Defer probing, and hope that
 421          * the required CRTC is added later.
 422          */
 423         if (crtc_mask == 0)
 424                 return -EPROBE_DEFER;
 425
 426         encoder->possible_crtcs = crtc_mask;
 427
 428         /* FIXME: this is the mask of outputs which can clone this output. */
 429         encoder->possible_clones = ~0;
 430
 431         return 0;
 432 }
 433 EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
 434
 435 static struct device_node *imx_drm_of_get_next_endpoint(
 436                 const struct device_node *parent, struct device_node *prev)
 437 {
 438         struct device_node *node = of_graph_get_next_endpoint(parent, prev);
 439
 440         of_node_put(prev);
 441         return node;
 442 }
 443
 444 /*
 445  * @node: device tree node containing encoder input ports
 446  * @encoder: drm_encoder
 447  */
 448 int imx_drm_encoder_get_mux_id(struct device_node *node,
 449                                struct drm_encoder *encoder)
 450 {
 451         struct imx_drm_crtc *imx_crtc = imx_drm_find_crtc(encoder->crtc);
 452         struct device_node *ep = NULL;
 453         struct of_endpoint endpoint;
 454         struct device_node *port;
 455         int ret;
 456
 457         if (!node || !imx_crtc)
 458                 return -EINVAL;
 459
 460         do {
 461                 ep = imx_drm_of_get_next_endpoint(node, ep);
 462                 if (!ep)
 463                         break;
 464
 465                 port = of_graph_get_remote_port(ep);
 466                 of_node_put(port);
 467                 if (port == imx_crtc->crtc->port) {
 468                         ret = of_graph_parse_endpoint(ep, &endpoint);
 469                         return ret ? ret : endpoint.port;
 470                 }
 471         } while (ep);
 472
 473         return -EINVAL;
 474 }
 475 EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
 476
 477 static const struct drm_ioctl_desc imx_drm_ioctls[] = {
 478         /* none so far */
 479 };
 480
 481 static struct drm_driver imx_drm_driver = {
 482         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 483         .load                   = imx_drm_driver_load,
 484         .unload                 = imx_drm_driver_unload,
 485         .lastclose              = imx_drm_driver_lastclose,
 486         .preclose               = imx_drm_driver_preclose,
 487         .set_busid              = drm_platform_set_busid,
 488         .gem_free_object        = drm_gem_cma_free_object,
 489         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 490         .dumb_create            = drm_gem_cma_dumb_create,
 491         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 492         .dumb_destroy           = drm_gem_dumb_destroy,
 493
 494         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 495         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 496         .gem_prime_import       = drm_gem_prime_import,
 497         .gem_prime_export       = drm_gem_prime_export,
 498         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 499         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 500         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 501         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 502         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 503         .get_vblank_counter     = drm_vblank_count,
 504         .enable_vblank          = imx_drm_enable_vblank,
 505         .disable_vblank         = imx_drm_disable_vblank,
 506         .ioctls                 = imx_drm_ioctls,
 507         .num_ioctls             = ARRAY_SIZE(imx_drm_ioctls),
 508         .fops                   = &imx_drm_driver_fops,
 509         .name                   = "imx-drm",
 510         .desc                   = "i.MX DRM graphics",
 511         .date                   = "20120507",
 512         .major                  = 1,
 513         .minor                  = 0,
 514         .patchlevel             = 0,
 515 };
 516
 517 static int compare_of(struct device *dev, void *data)
 518 {
 519         struct device_node *np = data;
 520
 521         /* Special case for LDB, one device for two channels */
 522         if (of_node_cmp(np->name, "lvds-channel") == 0) {
 523                 np = of_get_parent(np);
 524                 of_node_put(np);
 525         }
 526
 527         return dev->of_node == np;
 528 }
 529
 530 static int imx_drm_bind(struct device *dev)
 531 {
 532         return drm_platform_init(&imx_drm_driver, to_platform_device(dev));
 533 }
 534
 535 static void imx_drm_unbind(struct device *dev)
 536 {
 537         drm_put_dev(dev_get_drvdata(dev));
 538 }
 539
 540 static const struct component_master_ops imx_drm_ops = {
 541         .bind = imx_drm_bind,
 542         .unbind = imx_drm_unbind,
 543 };
 544
 545 static int imx_drm_platform_probe(struct platform_device *pdev)
 546 {
 547         struct device_node *ep, *port, *remote;
 548         struct component_match *match = NULL;
 549         int ret;
 550         int i;
 551
 552         /*
 553          * Bind the IPU display interface ports first, so that
 554          * imx_drm_encoder_parse_of called from encoder .bind callbacks
 555          * works as expected.
 556          */
 557         for (i = 0; ; i++) {
 558                 port = of_parse_phandle(pdev->dev.of_node, "ports", i);
 559                 if (!port)
 560                         break;
 561
 562                 component_match_add(&pdev->dev, &match, compare_of, port);
 563         }
 564
 565         if (i == 0) {
 566                 dev_err(&pdev->dev, "missing 'ports' property\n");
 567                 return -ENODEV;
 568         }
 569
 570         /* Then bind all encoders */
 571         for (i = 0; ; i++) {
 572                 port = of_parse_phandle(pdev->dev.of_node, "ports", i);
 573                 if (!port)
 574                         break;
 575
 576                 for_each_child_of_node(port, ep) {
 577                         remote = of_graph_get_remote_port_parent(ep);
 578                         if (!remote || !of_device_is_available(remote)) {
 579                                 of_node_put(remote);
 580                                 continue;
 581                         } else if (!of_device_is_available(remote->parent)) {
 582                                 dev_warn(&pdev->dev, "parent device of %s is not available\n",
 583                                          remote->full_name);
 584                                 of_node_put(remote);
 585                                 continue;
 586                         }
 587
 588                         component_match_add(&pdev->dev, &match, compare_of,
 589                                             remote);
 590                         of_node_put(remote);
 591                 }
 592                 of_node_put(port);
 593         }
 594
 595         ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 596         if (ret)
 597                 return ret;
 598
 599         return component_master_add_with_match(&pdev->dev, &imx_drm_ops, match);
 600 }
 601
 602 static int imx_drm_platform_remove(struct platform_device *pdev)
 603 {
 604         component_master_del(&pdev->dev, &imx_drm_ops);
 605         return 0;
 606 }
 607
 608 #ifdef CONFIG_PM_SLEEP
 609 static int imx_drm_suspend(struct device *dev)
 610 {
 611         struct drm_device *drm_dev = dev_get_drvdata(dev);
 612
 613         /* The drm_dev is NULL before .load hook is called */
 614         if (drm_dev == NULL)
 615                 return 0;
 616
 617         drm_kms_helper_poll_disable(drm_dev);
 618
 619         return 0;
 620 }
 621
 622 static int imx_drm_resume(struct device *dev)
 623 {
 624         struct drm_device *drm_dev = dev_get_drvdata(dev);
 625
 626         if (drm_dev == NULL)
 627                 return 0;
 628
 629         drm_helper_resume_force_mode(drm_dev);
 630         drm_kms_helper_poll_enable(drm_dev);
 631
 632         return 0;
 633 }
 634 #endif
 635
 636 static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
 637
 638 static const struct of_device_id imx_drm_dt_ids[] = {
 639         { .compatible = "fsl,imx-display-subsystem", },
 640         { /* sentinel */ },
 641 };
 642 MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
 643
 644 static struct platform_driver imx_drm_pdrv = {
 645         .probe          = imx_drm_platform_probe,
 646         .remove         = imx_drm_platform_remove,
 647         .driver         = {
 648                 .name   = "imx-drm",
 649                 .pm     = &imx_drm_pm_ops,
 650                 .of_match_table = imx_drm_dt_ids,
 651         },
 652 };
 653 module_platform_driver(imx_drm_pdrv);
 654
 655 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 656 MODULE_DESCRIPTION("i.MX drm driver core");
 657 MODULE_LICENSE("GPL");