drivers/staging/imx-drm/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
  17 #include <linux/device.h>
  18 #include <linux/platform_device.h>
  19 #include <drm/drmP.h>
  20 #include <drm/drm_fb_helper.h>
  21 #include <drm/drm_crtc_helper.h>
  22 #include <linux/fb.h>
  23 #include <linux/module.h>
  24 #include <drm/drm_gem_cma_helper.h>
  25 #include <drm/drm_fb_cma_helper.h>
  26
  27 #include "imx-drm.h"
  28
  29 #define MAX_CRTC        4
  30
  31 struct crtc_cookie {
  32         void *cookie;
  33         int id;
  34         struct list_head list;
  35 };
  36
  37 struct imx_drm_device {
  38         struct drm_device                       *drm;
  39         struct device                           *dev;
  40         struct list_head                        crtc_list;
  41         struct list_head                        encoder_list;
  42         struct list_head                        connector_list;
  43         struct mutex                            mutex;
  44         int                                     pipes;
  45         struct drm_fbdev_cma                    *fbhelper;
  46 };
  47
  48 struct imx_drm_crtc {
  49         struct drm_crtc                         *crtc;
  50         struct list_head                        list;
  51         struct imx_drm_device                   *imxdrm;
  52         int                                     pipe;
  53         struct imx_drm_crtc_helper_funcs        imx_drm_helper_funcs;
  54         struct module                           *owner;
  55         struct crtc_cookie                      cookie;
  56 };
  57
  58 struct imx_drm_encoder {
  59         struct drm_encoder                      *encoder;
  60         struct list_head                        list;
  61         struct module                           *owner;
  62         struct list_head                        possible_crtcs;
  63 };
  64
  65 struct imx_drm_connector {
  66         struct drm_connector                    *connector;
  67         struct list_head                        list;
  68         struct module                           *owner;
  69 };
  70
  71 int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
  72 {
  73         return crtc->pipe;
  74 }
  75 EXPORT_SYMBOL_GPL(imx_drm_crtc_id);
  76
  77 static void imx_drm_driver_lastclose(struct drm_device *drm)
  78 {
  79         struct imx_drm_device *imxdrm = drm->dev_private;
  80
  81         if (imxdrm->fbhelper)
  82                 drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
  83 }
  84
  85 static int imx_drm_driver_unload(struct drm_device *drm)
  86 {
  87         struct imx_drm_device *imxdrm = drm->dev_private;
  88
  89         imx_drm_device_put();
  90
  91         drm_mode_config_cleanup(imxdrm->drm);
  92         drm_kms_helper_poll_fini(imxdrm->drm);
  93
  94         return 0;
  95 }
  96
  97 /*
  98  * We don't care at all for crtc numbers, but the core expects the
  99  * crtcs to be numbered
 100  */
 101 static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
 102                 int num)
 103 {
 104         struct imx_drm_crtc *imx_drm_crtc;
 105
 106         list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
 107                 if (imx_drm_crtc->pipe == num)
 108                         return imx_drm_crtc;
 109         return NULL;
 110 }
 111
 112 int imx_drm_crtc_panel_format_pins(struct drm_crtc *crtc, u32 encoder_type,
 113                 u32 interface_pix_fmt, int hsync_pin, int vsync_pin)
 114 {
 115         struct imx_drm_device *imxdrm = crtc->dev->dev_private;
 116         struct imx_drm_crtc *imx_crtc;
 117         struct imx_drm_crtc_helper_funcs *helper;
 118
 119         list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
 120                 if (imx_crtc->crtc == crtc)
 121                         goto found;
 122
 123         return -EINVAL;
 124 found:
 125         helper = &imx_crtc->imx_drm_helper_funcs;
 126         if (helper->set_interface_pix_fmt)
 127                 return helper->set_interface_pix_fmt(crtc,
 128                                 encoder_type, interface_pix_fmt,
 129                                 hsync_pin, vsync_pin);
 130         return 0;
 131 }
 132 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format_pins);
 133
 134 int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
 135                 u32 interface_pix_fmt)
 136 {
 137         return imx_drm_crtc_panel_format_pins(crtc, encoder_type,
 138                                               interface_pix_fmt, 2, 3);
 139 }
 140 EXPORT_SYMBOL_GPL(imx_drm_crtc_panel_format);
 141
 142 int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
 143 {
 144         return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
 145 }
 146 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
 147
 148 void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
 149 {
 150         drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
 151 }
 152 EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
 153
 154 void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
 155 {
 156         drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
 157 }
 158 EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
 159
 160 static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
 161 {
 162         struct imx_drm_device *imxdrm = drm->dev_private;
 163         struct imx_drm_crtc *imx_drm_crtc;
 164         int ret;
 165
 166         imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
 167         if (!imx_drm_crtc)
 168                 return -EINVAL;
 169
 170         if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
 171                 return -ENOSYS;
 172
 173         ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
 174                         imx_drm_crtc->crtc);
 175
 176         return ret;
 177 }
 178
 179 static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
 180 {
 181         struct imx_drm_device *imxdrm = drm->dev_private;
 182         struct imx_drm_crtc *imx_drm_crtc;
 183
 184         imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
 185         if (!imx_drm_crtc)
 186                 return;
 187
 188         if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
 189                 return;
 190
 191         imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
 192 }
 193
 194 static void imx_drm_driver_preclose(struct drm_device *drm,
 195                 struct drm_file *file)
 196 {
 197         int i;
 198
 199         if (!file->is_master)
 200                 return;
 201
 202         for (i = 0; i < 4; i++)
 203                 imx_drm_disable_vblank(drm , i);
 204 }
 205
 206 static const struct file_operations imx_drm_driver_fops = {
 207         .owner = THIS_MODULE,
 208         .open = drm_open,
 209         .release = drm_release,
 210         .unlocked_ioctl = drm_ioctl,
 211         .mmap = drm_gem_cma_mmap,
 212         .poll = drm_poll,
 213         .read = drm_read,
 214         .llseek = noop_llseek,
 215 };
 216
 217 static struct imx_drm_device *imx_drm_device;
 218
 219 static struct imx_drm_device *__imx_drm_device(void)
 220 {
 221         return imx_drm_device;
 222 }
 223
 224 struct drm_device *imx_drm_device_get(void)
 225 {
 226         struct imx_drm_device *imxdrm = __imx_drm_device();
 227         struct imx_drm_encoder *enc;
 228         struct imx_drm_connector *con;
 229         struct imx_drm_crtc *crtc;
 230
 231         list_for_each_entry(enc, &imxdrm->encoder_list, list) {
 232                 if (!try_module_get(enc->owner)) {
 233                         dev_err(imxdrm->dev, "could not get module %s\n",
 234                                         module_name(enc->owner));
 235                         goto unwind_enc;
 236                 }
 237         }
 238
 239         list_for_each_entry(con, &imxdrm->connector_list, list) {
 240                 if (!try_module_get(con->owner)) {
 241                         dev_err(imxdrm->dev, "could not get module %s\n",
 242                                         module_name(con->owner));
 243                         goto unwind_con;
 244                 }
 245         }
 246
 247         list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
 248                 if (!try_module_get(crtc->owner)) {
 249                         dev_err(imxdrm->dev, "could not get module %s\n",
 250                                         module_name(crtc->owner));
 251                         goto unwind_crtc;
 252                 }
 253         }
 254
 255         return imxdrm->drm;
 256
 257 unwind_crtc:
 258         list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
 259                 module_put(crtc->owner);
 260 unwind_con:
 261         list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
 262                 module_put(con->owner);
 263 unwind_enc:
 264         list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
 265                 module_put(enc->owner);
 266
 267         mutex_unlock(&imxdrm->mutex);
 268
 269         return NULL;
 270
 271 }
 272 EXPORT_SYMBOL_GPL(imx_drm_device_get);
 273
 274 void imx_drm_device_put(void)
 275 {
 276         struct imx_drm_device *imxdrm = __imx_drm_device();
 277         struct imx_drm_encoder *enc;
 278         struct imx_drm_connector *con;
 279         struct imx_drm_crtc *crtc;
 280
 281         mutex_lock(&imxdrm->mutex);
 282
 283         list_for_each_entry(crtc, &imxdrm->crtc_list, list)
 284                 module_put(crtc->owner);
 285
 286         list_for_each_entry(con, &imxdrm->connector_list, list)
 287                 module_put(con->owner);
 288
 289         list_for_each_entry(enc, &imxdrm->encoder_list, list)
 290                 module_put(enc->owner);
 291
 292         mutex_unlock(&imxdrm->mutex);
 293 }
 294 EXPORT_SYMBOL_GPL(imx_drm_device_put);
 295
 296 static int drm_mode_group_reinit(struct drm_device *dev)
 297 {
 298         struct drm_mode_group *group = &dev->primary->mode_group;
 299         uint32_t *id_list = group->id_list;
 300         int ret;
 301
 302         ret = drm_mode_group_init_legacy_group(dev, group);
 303         if (ret < 0)
 304                 return ret;
 305
 306         kfree(id_list);
 307         return 0;
 308 }
 309
 310 /*
 311  * register an encoder to the drm core
 312  */
 313 static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
 314 {
 315         struct imx_drm_device *imxdrm = __imx_drm_device();
 316
 317         INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
 318
 319         drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
 320                         imx_drm_encoder->encoder->funcs,
 321                         imx_drm_encoder->encoder->encoder_type);
 322
 323         drm_mode_group_reinit(imxdrm->drm);
 324
 325         return 0;
 326 }
 327
 328 /*
 329  * unregister an encoder from the drm core
 330  */
 331 static void imx_drm_encoder_unregister(struct imx_drm_encoder
 332                 *imx_drm_encoder)
 333 {
 334         struct imx_drm_device *imxdrm = __imx_drm_device();
 335
 336         drm_encoder_cleanup(imx_drm_encoder->encoder);
 337
 338         drm_mode_group_reinit(imxdrm->drm);
 339 }
 340
 341 /*
 342  * register a connector to the drm core
 343  */
 344 static int imx_drm_connector_register(
 345                 struct imx_drm_connector *imx_drm_connector)
 346 {
 347         struct imx_drm_device *imxdrm = __imx_drm_device();
 348
 349         drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
 350                         imx_drm_connector->connector->funcs,
 351                         imx_drm_connector->connector->connector_type);
 352         drm_mode_group_reinit(imxdrm->drm);
 353
 354         return drm_sysfs_connector_add(imx_drm_connector->connector);
 355 }
 356
 357 /*
 358  * unregister a connector from the drm core
 359  */
 360 static void imx_drm_connector_unregister(
 361                 struct imx_drm_connector *imx_drm_connector)
 362 {
 363         struct imx_drm_device *imxdrm = __imx_drm_device();
 364
 365         drm_sysfs_connector_remove(imx_drm_connector->connector);
 366         drm_connector_cleanup(imx_drm_connector->connector);
 367
 368         drm_mode_group_reinit(imxdrm->drm);
 369 }
 370
 371 /*
 372  * register a crtc to the drm core
 373  */
 374 static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
 375 {
 376         struct imx_drm_device *imxdrm = __imx_drm_device();
 377         int ret;
 378
 379         drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
 380                         imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
 381         ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
 382         if (ret)
 383                 return ret;
 384
 385         drm_crtc_helper_add(imx_drm_crtc->crtc,
 386                         imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
 387
 388         drm_mode_group_reinit(imxdrm->drm);
 389
 390         return 0;
 391 }
 392
 393 /*
 394  * Called by the CRTC driver when all CRTCs are registered. This
 395  * puts all the pieces together and initializes the driver.
 396  * Once this is called no more CRTCs can be registered since
 397  * the drm core has hardcoded the number of crtcs in several
 398  * places.
 399  */
 400 static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
 401 {
 402         struct imx_drm_device *imxdrm = __imx_drm_device();
 403         int ret;
 404
 405         imxdrm->drm = drm;
 406
 407         drm->dev_private = imxdrm;
 408
 409         /*
 410          * enable drm irq mode.
 411          * - with irq_enabled = true, we can use the vblank feature.
 412          *
 413          * P.S. note that we wouldn't use drm irq handler but
 414          *      just specific driver own one instead because
 415          *      drm framework supports only one irq handler and
 416          *      drivers can well take care of their interrupts
 417          */
 418         drm->irq_enabled = true;
 419
 420         drm_mode_config_init(drm);
 421         imx_drm_mode_config_init(drm);
 422
 423         mutex_lock(&imxdrm->mutex);
 424
 425         drm_kms_helper_poll_init(imxdrm->drm);
 426
 427         /* setup the grouping for the legacy output */
 428         ret = drm_mode_group_init_legacy_group(imxdrm->drm,
 429                         &imxdrm->drm->primary->mode_group);
 430         if (ret)
 431                 goto err_init;
 432
 433         ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
 434         if (ret)
 435                 goto err_init;
 436
 437         /*
 438          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 439          * by drm timer once a current process gives up ownership of
 440          * vblank event.(after drm_vblank_put function is called)
 441          */
 442         imxdrm->drm->vblank_disable_allowed = true;
 443
 444         if (!imx_drm_device_get())
 445                 ret = -EINVAL;
 446
 447         ret = 0;
 448
 449 err_init:
 450         mutex_unlock(&imxdrm->mutex);
 451
 452         return ret;
 453 }
 454
 455 static void imx_drm_update_possible_crtcs(void)
 456 {
 457         struct imx_drm_device *imxdrm = __imx_drm_device();
 458         struct imx_drm_crtc *imx_drm_crtc;
 459         struct imx_drm_encoder *enc;
 460         struct crtc_cookie *cookie;
 461
 462         list_for_each_entry(enc, &imxdrm->encoder_list, list) {
 463                 u32 possible_crtcs = 0;
 464
 465                 list_for_each_entry(cookie, &enc->possible_crtcs, list) {
 466                         list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
 467                                 if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
 468                                                 imx_drm_crtc->cookie.id == cookie->id) {
 469                                         possible_crtcs |= 1 << imx_drm_crtc->pipe;
 470                                 }
 471                         }
 472                 }
 473                 enc->encoder->possible_crtcs = possible_crtcs;
 474                 enc->encoder->possible_clones = possible_crtcs;
 475         }
 476 }
 477
 478 /*
 479  * imx_drm_add_crtc - add a new crtc
 480  *
 481  * The return value if !NULL is a cookie for the caller to pass to
 482  * imx_drm_remove_crtc later.
 483  */
 484 int imx_drm_add_crtc(struct drm_crtc *crtc,
 485                 struct imx_drm_crtc **new_crtc,
 486                 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
 487                 struct module *owner, void *cookie, int id)
 488 {
 489         struct imx_drm_device *imxdrm = __imx_drm_device();
 490         struct imx_drm_crtc *imx_drm_crtc;
 491         int ret;
 492
 493         mutex_lock(&imxdrm->mutex);
 494
 495         if (imxdrm->drm->open_count) {
 496                 ret = -EBUSY;
 497                 goto err_busy;
 498         }
 499
 500         imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
 501         if (!imx_drm_crtc) {
 502                 ret = -ENOMEM;
 503                 goto err_alloc;
 504         }
 505
 506         imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
 507         imx_drm_crtc->pipe = imxdrm->pipes++;
 508         imx_drm_crtc->cookie.cookie = cookie;
 509         imx_drm_crtc->cookie.id = id;
 510
 511         imx_drm_crtc->crtc = crtc;
 512         imx_drm_crtc->imxdrm = imxdrm;
 513
 514         imx_drm_crtc->owner = owner;
 515
 516         list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
 517
 518         *new_crtc = imx_drm_crtc;
 519
 520         ret = imx_drm_crtc_register(imx_drm_crtc);
 521         if (ret)
 522                 goto err_register;
 523
 524         imx_drm_update_possible_crtcs();
 525
 526         mutex_unlock(&imxdrm->mutex);
 527
 528         return 0;
 529
 530 err_register:
 531         list_del(&imx_drm_crtc->list);
 532         kfree(imx_drm_crtc);
 533 err_alloc:
 534 err_busy:
 535         mutex_unlock(&imxdrm->mutex);
 536         return ret;
 537 }
 538 EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
 539
 540 /*
 541  * imx_drm_remove_crtc - remove a crtc
 542  */
 543 int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
 544 {
 545         struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
 546
 547         mutex_lock(&imxdrm->mutex);
 548
 549         drm_crtc_cleanup(imx_drm_crtc->crtc);
 550
 551         list_del(&imx_drm_crtc->list);
 552
 553         drm_mode_group_reinit(imxdrm->drm);
 554
 555         mutex_unlock(&imxdrm->mutex);
 556
 557         kfree(imx_drm_crtc);
 558
 559         return 0;
 560 }
 561 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
 562
 563 /*
 564  * imx_drm_add_encoder - add a new encoder
 565  */
 566 int imx_drm_add_encoder(struct drm_encoder *encoder,
 567                 struct imx_drm_encoder **newenc, struct module *owner)
 568 {
 569         struct imx_drm_device *imxdrm = __imx_drm_device();
 570         struct imx_drm_encoder *imx_drm_encoder;
 571         int ret;
 572
 573         mutex_lock(&imxdrm->mutex);
 574
 575         if (imxdrm->drm->open_count) {
 576                 ret = -EBUSY;
 577                 goto err_busy;
 578         }
 579
 580         imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
 581         if (!imx_drm_encoder) {
 582                 ret = -ENOMEM;
 583                 goto err_alloc;
 584         }
 585
 586         imx_drm_encoder->encoder = encoder;
 587         imx_drm_encoder->owner = owner;
 588
 589         ret = imx_drm_encoder_register(imx_drm_encoder);
 590         if (ret) {
 591                 ret = -ENOMEM;
 592                 goto err_register;
 593         }
 594
 595         list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
 596
 597         *newenc = imx_drm_encoder;
 598
 599         mutex_unlock(&imxdrm->mutex);
 600
 601         return 0;
 602
 603 err_register:
 604         kfree(imx_drm_encoder);
 605 err_alloc:
 606 err_busy:
 607         mutex_unlock(&imxdrm->mutex);
 608
 609         return ret;
 610 }
 611 EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
 612
 613 int imx_drm_encoder_add_possible_crtcs(
 614                 struct imx_drm_encoder *imx_drm_encoder,
 615                 struct device_node *np)
 616 {
 617         struct imx_drm_device *imxdrm = __imx_drm_device();
 618         struct of_phandle_args args;
 619         struct crtc_cookie *c;
 620         int ret = 0;
 621         int i;
 622
 623         if (!list_empty(&imx_drm_encoder->possible_crtcs))
 624                 return -EBUSY;
 625
 626         for (i = 0; !ret; i++) {
 627                 ret = of_parse_phandle_with_args(np, "crtcs",
 628                                 "#crtc-cells", i, &args);
 629                 if (ret < 0)
 630                         break;
 631
 632                 c = kzalloc(sizeof(*c), GFP_KERNEL);
 633                 if (!c) {
 634                         of_node_put(args.np);
 635                         return -ENOMEM;
 636                 }
 637
 638                 c->cookie = args.np;
 639                 c->id = args.args_count > 0 ? args.args[0] : 0;
 640
 641                 of_node_put(args.np);
 642
 643                 mutex_lock(&imxdrm->mutex);
 644
 645                 list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
 646
 647                 mutex_unlock(&imxdrm->mutex);
 648         }
 649
 650         imx_drm_update_possible_crtcs();
 651
 652         return 0;
 653 }
 654 EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs);
 655
 656 int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
 657                 struct drm_crtc *crtc)
 658 {
 659         struct imx_drm_device *imxdrm = __imx_drm_device();
 660         struct imx_drm_crtc *imx_crtc;
 661         int i = 0;
 662
 663         list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
 664                 if (imx_crtc->crtc == crtc)
 665                         goto found;
 666                 i++;
 667         }
 668
 669         return -EINVAL;
 670 found:
 671         return i;
 672 }
 673 EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
 674
 675 /*
 676  * imx_drm_remove_encoder - remove an encoder
 677  */
 678 int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
 679 {
 680         struct imx_drm_device *imxdrm = __imx_drm_device();
 681         struct crtc_cookie *c, *tmp;
 682
 683         mutex_lock(&imxdrm->mutex);
 684
 685         imx_drm_encoder_unregister(imx_drm_encoder);
 686
 687         list_del(&imx_drm_encoder->list);
 688
 689         list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
 690                         list)
 691                 kfree(c);
 692
 693         mutex_unlock(&imxdrm->mutex);
 694
 695         kfree(imx_drm_encoder);
 696
 697         return 0;
 698 }
 699 EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
 700
 701 /*
 702  * imx_drm_add_connector - add a connector
 703  */
 704 int imx_drm_add_connector(struct drm_connector *connector,
 705                 struct imx_drm_connector **new_con,
 706                 struct module *owner)
 707 {
 708         struct imx_drm_device *imxdrm = __imx_drm_device();
 709         struct imx_drm_connector *imx_drm_connector;
 710         int ret;
 711
 712         mutex_lock(&imxdrm->mutex);
 713
 714         if (imxdrm->drm->open_count) {
 715                 ret = -EBUSY;
 716                 goto err_busy;
 717         }
 718
 719         imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
 720         if (!imx_drm_connector) {
 721                 ret = -ENOMEM;
 722                 goto err_alloc;
 723         }
 724
 725         imx_drm_connector->connector = connector;
 726         imx_drm_connector->owner = owner;
 727
 728         ret = imx_drm_connector_register(imx_drm_connector);
 729         if (ret)
 730                 goto err_register;
 731
 732         list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
 733
 734         *new_con = imx_drm_connector;
 735
 736         mutex_unlock(&imxdrm->mutex);
 737
 738         return 0;
 739
 740 err_register:
 741         kfree(imx_drm_connector);
 742 err_alloc:
 743 err_busy:
 744         mutex_unlock(&imxdrm->mutex);
 745
 746         return ret;
 747 }
 748 EXPORT_SYMBOL_GPL(imx_drm_add_connector);
 749
 750 void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
 751 {
 752         struct imx_drm_device *imxdrm = __imx_drm_device();
 753
 754         imxdrm->fbhelper = fbdev_helper;
 755 }
 756 EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
 757
 758 /*
 759  * imx_drm_remove_connector - remove a connector
 760  */
 761 int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
 762 {
 763         struct imx_drm_device *imxdrm = __imx_drm_device();
 764
 765         mutex_lock(&imxdrm->mutex);
 766
 767         imx_drm_connector_unregister(imx_drm_connector);
 768
 769         list_del(&imx_drm_connector->list);
 770
 771         mutex_unlock(&imxdrm->mutex);
 772
 773         kfree(imx_drm_connector);
 774
 775         return 0;
 776 }
 777 EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
 778
 779 static const struct drm_ioctl_desc imx_drm_ioctls[] = {
 780         /* none so far */
 781 };
 782
 783 static struct drm_driver imx_drm_driver = {
 784         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 785         .load                   = imx_drm_driver_load,
 786         .unload                 = imx_drm_driver_unload,
 787         .lastclose              = imx_drm_driver_lastclose,
 788         .preclose               = imx_drm_driver_preclose,
 789         .gem_free_object        = drm_gem_cma_free_object,
 790         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 791         .dumb_create            = drm_gem_cma_dumb_create,
 792         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 793         .dumb_destroy           = drm_gem_dumb_destroy,
 794
 795         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 796         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 797         .gem_prime_import       = drm_gem_prime_import,
 798         .gem_prime_export       = drm_gem_prime_export,
 799         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 800         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 801         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 802         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 803         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 804         .get_vblank_counter     = drm_vblank_count,
 805         .enable_vblank          = imx_drm_enable_vblank,
 806         .disable_vblank         = imx_drm_disable_vblank,
 807         .ioctls                 = imx_drm_ioctls,
 808         .num_ioctls             = ARRAY_SIZE(imx_drm_ioctls),
 809         .fops                   = &imx_drm_driver_fops,
 810         .name                   = "imx-drm",
 811         .desc                   = "i.MX DRM graphics",
 812         .date                   = "20120507",
 813         .major                  = 1,
 814         .minor                  = 0,
 815         .patchlevel             = 0,
 816 };
 817
 818 static int imx_drm_platform_probe(struct platform_device *pdev)
 819 {
 820         int ret;
 821
 822         ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 823         if (ret)
 824                 return ret;
 825
 826         imx_drm_device->dev = &pdev->dev;
 827
 828         return drm_platform_init(&imx_drm_driver, pdev);
 829 }
 830
 831 static int imx_drm_platform_remove(struct platform_device *pdev)
 832 {
 833         drm_platform_exit(&imx_drm_driver, pdev);
 834
 835         return 0;
 836 }
 837
 838 static struct platform_driver imx_drm_pdrv = {
 839         .probe          = imx_drm_platform_probe,
 840         .remove         = imx_drm_platform_remove,
 841         .driver         = {
 842                 .owner  = THIS_MODULE,
 843                 .name   = "imx-drm",
 844         },
 845 };
 846
 847 static struct platform_device *imx_drm_pdev;
 848
 849 static int __init imx_drm_init(void)
 850 {
 851         int ret;
 852
 853         imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
 854         if (!imx_drm_device)
 855                 return -ENOMEM;
 856
 857         mutex_init(&imx_drm_device->mutex);
 858         INIT_LIST_HEAD(&imx_drm_device->crtc_list);
 859         INIT_LIST_HEAD(&imx_drm_device->connector_list);
 860         INIT_LIST_HEAD(&imx_drm_device->encoder_list);
 861
 862         imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
 863         if (IS_ERR(imx_drm_pdev)) {
 864                 ret = PTR_ERR(imx_drm_pdev);
 865                 goto err_pdev;
 866         }
 867
 868         ret = platform_driver_register(&imx_drm_pdrv);
 869         if (ret)
 870                 goto err_pdrv;
 871
 872         return 0;
 873
 874 err_pdrv:
 875         platform_device_unregister(imx_drm_pdev);
 876 err_pdev:
 877         kfree(imx_drm_device);
 878
 879         return ret;
 880 }
 881
 882 static void __exit imx_drm_exit(void)
 883 {
 884         platform_device_unregister(imx_drm_pdev);
 885         platform_driver_unregister(&imx_drm_pdrv);
 886
 887         kfree(imx_drm_device);
 888 }
 889
 890 module_init(imx_drm_init);
 891 module_exit(imx_drm_exit);
 892
 893 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 894 MODULE_DESCRIPTION("i.MX drm driver core");
 895 MODULE_LICENSE("GPL");