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         platform_set_drvdata(drm->platformdev, drm);
 448
 449         ret = 0;
 450
 451 err_init:
 452         mutex_unlock(&imxdrm->mutex);
 453
 454         return ret;
 455 }
 456
 457 static void imx_drm_update_possible_crtcs(void)
 458 {
 459         struct imx_drm_device *imxdrm = __imx_drm_device();
 460         struct imx_drm_crtc *imx_drm_crtc;
 461         struct imx_drm_encoder *enc;
 462         struct crtc_cookie *cookie;
 463
 464         list_for_each_entry(enc, &imxdrm->encoder_list, list) {
 465                 u32 possible_crtcs = 0;
 466
 467                 list_for_each_entry(cookie, &enc->possible_crtcs, list) {
 468                         list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
 469                                 if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
 470                                                 imx_drm_crtc->cookie.id == cookie->id) {
 471                                         possible_crtcs |= 1 << imx_drm_crtc->pipe;
 472                                 }
 473                         }
 474                 }
 475                 enc->encoder->possible_crtcs = possible_crtcs;
 476                 enc->encoder->possible_clones = possible_crtcs;
 477         }
 478 }
 479
 480 /*
 481  * imx_drm_add_crtc - add a new crtc
 482  *
 483  * The return value if !NULL is a cookie for the caller to pass to
 484  * imx_drm_remove_crtc later.
 485  */
 486 int imx_drm_add_crtc(struct drm_crtc *crtc,
 487                 struct imx_drm_crtc **new_crtc,
 488                 const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
 489                 struct module *owner, void *cookie, int id)
 490 {
 491         struct imx_drm_device *imxdrm = __imx_drm_device();
 492         struct imx_drm_crtc *imx_drm_crtc;
 493         int ret;
 494
 495         mutex_lock(&imxdrm->mutex);
 496
 497         if (imxdrm->drm->open_count) {
 498                 ret = -EBUSY;
 499                 goto err_busy;
 500         }
 501
 502         imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
 503         if (!imx_drm_crtc) {
 504                 ret = -ENOMEM;
 505                 goto err_alloc;
 506         }
 507
 508         imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
 509         imx_drm_crtc->pipe = imxdrm->pipes++;
 510         imx_drm_crtc->cookie.cookie = cookie;
 511         imx_drm_crtc->cookie.id = id;
 512
 513         imx_drm_crtc->crtc = crtc;
 514         imx_drm_crtc->imxdrm = imxdrm;
 515
 516         imx_drm_crtc->owner = owner;
 517
 518         list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
 519
 520         *new_crtc = imx_drm_crtc;
 521
 522         ret = imx_drm_crtc_register(imx_drm_crtc);
 523         if (ret)
 524                 goto err_register;
 525
 526         imx_drm_update_possible_crtcs();
 527
 528         mutex_unlock(&imxdrm->mutex);
 529
 530         return 0;
 531
 532 err_register:
 533         kfree(imx_drm_crtc);
 534 err_alloc:
 535 err_busy:
 536         mutex_unlock(&imxdrm->mutex);
 537         return ret;
 538 }
 539 EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
 540
 541 /*
 542  * imx_drm_remove_crtc - remove a crtc
 543  */
 544 int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
 545 {
 546         struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
 547
 548         mutex_lock(&imxdrm->mutex);
 549
 550         drm_crtc_cleanup(imx_drm_crtc->crtc);
 551
 552         list_del(&imx_drm_crtc->list);
 553
 554         drm_mode_group_reinit(imxdrm->drm);
 555
 556         mutex_unlock(&imxdrm->mutex);
 557
 558         kfree(imx_drm_crtc);
 559
 560         return 0;
 561 }
 562 EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
 563
 564 /*
 565  * imx_drm_add_encoder - add a new encoder
 566  */
 567 int imx_drm_add_encoder(struct drm_encoder *encoder,
 568                 struct imx_drm_encoder **newenc, struct module *owner)
 569 {
 570         struct imx_drm_device *imxdrm = __imx_drm_device();
 571         struct imx_drm_encoder *imx_drm_encoder;
 572         int ret;
 573
 574         mutex_lock(&imxdrm->mutex);
 575
 576         if (imxdrm->drm->open_count) {
 577                 ret = -EBUSY;
 578                 goto err_busy;
 579         }
 580
 581         imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
 582         if (!imx_drm_encoder) {
 583                 ret = -ENOMEM;
 584                 goto err_alloc;
 585         }
 586
 587         imx_drm_encoder->encoder = encoder;
 588         imx_drm_encoder->owner = owner;
 589
 590         ret = imx_drm_encoder_register(imx_drm_encoder);
 591         if (ret) {
 592                 ret = -ENOMEM;
 593                 goto err_register;
 594         }
 595
 596         list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
 597
 598         *newenc = imx_drm_encoder;
 599
 600         mutex_unlock(&imxdrm->mutex);
 601
 602         return 0;
 603
 604 err_register:
 605         kfree(imx_drm_encoder);
 606 err_alloc:
 607 err_busy:
 608         mutex_unlock(&imxdrm->mutex);
 609
 610         return ret;
 611 }
 612 EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
 613
 614 int imx_drm_encoder_add_possible_crtcs(
 615                 struct imx_drm_encoder *imx_drm_encoder,
 616                 struct device_node *np)
 617 {
 618         struct imx_drm_device *imxdrm = __imx_drm_device();
 619         struct of_phandle_args args;
 620         struct crtc_cookie *c;
 621         int ret = 0;
 622         int i;
 623
 624         if (!list_empty(&imx_drm_encoder->possible_crtcs))
 625                 return -EBUSY;
 626
 627         for (i = 0; !ret; i++) {
 628                 ret = of_parse_phandle_with_args(np, "crtcs",
 629                                 "#crtc-cells", i, &args);
 630                 if (ret < 0)
 631                         break;
 632
 633                 c = kzalloc(sizeof(*c), GFP_KERNEL);
 634                 if (!c) {
 635                         of_node_put(args.np);
 636                         return -ENOMEM;
 637                 }
 638
 639                 c->cookie = args.np;
 640                 c->id = args.args_count > 0 ? args.args[0] : 0;
 641
 642                 of_node_put(args.np);
 643
 644                 mutex_lock(&imxdrm->mutex);
 645
 646                 list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
 647
 648                 mutex_unlock(&imxdrm->mutex);
 649         }
 650
 651         imx_drm_update_possible_crtcs();
 652
 653         return 0;
 654 }
 655 EXPORT_SYMBOL_GPL(imx_drm_encoder_add_possible_crtcs);
 656
 657 int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
 658                 struct drm_crtc *crtc)
 659 {
 660         struct imx_drm_device *imxdrm = __imx_drm_device();
 661         struct imx_drm_crtc *imx_crtc;
 662         int i = 0;
 663
 664         list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
 665                 if (imx_crtc->crtc == crtc)
 666                         goto found;
 667                 i++;
 668         }
 669
 670         return -EINVAL;
 671 found:
 672         return i;
 673 }
 674 EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
 675
 676 /*
 677  * imx_drm_remove_encoder - remove an encoder
 678  */
 679 int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
 680 {
 681         struct imx_drm_device *imxdrm = __imx_drm_device();
 682         struct crtc_cookie *c, *tmp;
 683
 684         mutex_lock(&imxdrm->mutex);
 685
 686         imx_drm_encoder_unregister(imx_drm_encoder);
 687
 688         list_del(&imx_drm_encoder->list);
 689
 690         list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
 691                         list)
 692                 kfree(c);
 693
 694         mutex_unlock(&imxdrm->mutex);
 695
 696         kfree(imx_drm_encoder);
 697
 698         return 0;
 699 }
 700 EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
 701
 702 /*
 703  * imx_drm_add_connector - add a connector
 704  */
 705 int imx_drm_add_connector(struct drm_connector *connector,
 706                 struct imx_drm_connector **new_con,
 707                 struct module *owner)
 708 {
 709         struct imx_drm_device *imxdrm = __imx_drm_device();
 710         struct imx_drm_connector *imx_drm_connector;
 711         int ret;
 712
 713         mutex_lock(&imxdrm->mutex);
 714
 715         if (imxdrm->drm->open_count) {
 716                 ret = -EBUSY;
 717                 goto err_busy;
 718         }
 719
 720         imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
 721         if (!imx_drm_connector) {
 722                 ret = -ENOMEM;
 723                 goto err_alloc;
 724         }
 725
 726         imx_drm_connector->connector = connector;
 727         imx_drm_connector->owner = owner;
 728
 729         ret = imx_drm_connector_register(imx_drm_connector);
 730         if (ret)
 731                 goto err_register;
 732
 733         list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
 734
 735         *new_con = imx_drm_connector;
 736
 737         mutex_unlock(&imxdrm->mutex);
 738
 739         return 0;
 740
 741 err_register:
 742         kfree(imx_drm_connector);
 743 err_alloc:
 744 err_busy:
 745         mutex_unlock(&imxdrm->mutex);
 746
 747         return ret;
 748 }
 749 EXPORT_SYMBOL_GPL(imx_drm_add_connector);
 750
 751 void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
 752 {
 753         struct imx_drm_device *imxdrm = __imx_drm_device();
 754
 755         imxdrm->fbhelper = fbdev_helper;
 756 }
 757 EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
 758
 759 /*
 760  * imx_drm_remove_connector - remove a connector
 761  */
 762 int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
 763 {
 764         struct imx_drm_device *imxdrm = __imx_drm_device();
 765
 766         mutex_lock(&imxdrm->mutex);
 767
 768         imx_drm_connector_unregister(imx_drm_connector);
 769
 770         list_del(&imx_drm_connector->list);
 771
 772         mutex_unlock(&imxdrm->mutex);
 773
 774         kfree(imx_drm_connector);
 775
 776         return 0;
 777 }
 778 EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
 779
 780 static const struct drm_ioctl_desc imx_drm_ioctls[] = {
 781         /* none so far */
 782 };
 783
 784 static struct drm_driver imx_drm_driver = {
 785         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 786         .load                   = imx_drm_driver_load,
 787         .unload                 = imx_drm_driver_unload,
 788         .lastclose              = imx_drm_driver_lastclose,
 789         .preclose               = imx_drm_driver_preclose,
 790         .gem_free_object        = drm_gem_cma_free_object,
 791         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 792         .dumb_create            = drm_gem_cma_dumb_create,
 793         .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
 794         .dumb_destroy           = drm_gem_dumb_destroy,
 795
 796         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 797         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 798         .gem_prime_import       = drm_gem_prime_import,
 799         .gem_prime_export       = drm_gem_prime_export,
 800         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 801         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 802         .gem_prime_vmap         = drm_gem_cma_prime_vmap,
 803         .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
 804         .gem_prime_mmap         = drm_gem_cma_prime_mmap,
 805         .get_vblank_counter     = drm_vblank_count,
 806         .enable_vblank          = imx_drm_enable_vblank,
 807         .disable_vblank         = imx_drm_disable_vblank,
 808         .ioctls                 = imx_drm_ioctls,
 809         .num_ioctls             = ARRAY_SIZE(imx_drm_ioctls),
 810         .fops                   = &imx_drm_driver_fops,
 811         .name                   = "imx-drm",
 812         .desc                   = "i.MX DRM graphics",
 813         .date                   = "20120507",
 814         .major                  = 1,
 815         .minor                  = 0,
 816         .patchlevel             = 0,
 817 };
 818
 819 static int imx_drm_platform_probe(struct platform_device *pdev)
 820 {
 821         int ret;
 822
 823         ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 824         if (ret)
 825                 return ret;
 826
 827         imx_drm_device->dev = &pdev->dev;
 828
 829         return drm_platform_init(&imx_drm_driver, pdev);
 830 }
 831
 832 static int imx_drm_platform_remove(struct platform_device *pdev)
 833 {
 834         drm_put_dev(platform_get_drvdata(pdev));
 835
 836         return 0;
 837 }
 838
 839 static struct platform_driver imx_drm_pdrv = {
 840         .probe          = imx_drm_platform_probe,
 841         .remove         = imx_drm_platform_remove,
 842         .driver         = {
 843                 .owner  = THIS_MODULE,
 844                 .name   = "imx-drm",
 845         },
 846 };
 847
 848 static struct platform_device *imx_drm_pdev;
 849
 850 static int __init imx_drm_init(void)
 851 {
 852         int ret;
 853
 854         imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
 855         if (!imx_drm_device)
 856                 return -ENOMEM;
 857
 858         mutex_init(&imx_drm_device->mutex);
 859         INIT_LIST_HEAD(&imx_drm_device->crtc_list);
 860         INIT_LIST_HEAD(&imx_drm_device->connector_list);
 861         INIT_LIST_HEAD(&imx_drm_device->encoder_list);
 862
 863         imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
 864         if (IS_ERR(imx_drm_pdev)) {
 865                 ret = PTR_ERR(imx_drm_pdev);
 866                 goto err_pdev;
 867         }
 868
 869         ret = platform_driver_register(&imx_drm_pdrv);
 870         if (ret)
 871                 goto err_pdrv;
 872
 873         return 0;
 874
 875 err_pdrv:
 876         platform_device_unregister(imx_drm_pdev);
 877 err_pdev:
 878         kfree(imx_drm_device);
 879
 880         return ret;
 881 }
 882
 883 static void __exit imx_drm_exit(void)
 884 {
 885         platform_device_unregister(imx_drm_pdev);
 886         platform_driver_unregister(&imx_drm_pdrv);
 887
 888         kfree(imx_drm_device);
 889 }
 890
 891 module_init(imx_drm_init);
 892 module_exit(imx_drm_exit);
 893
 894 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 895 MODULE_DESCRIPTION("i.MX drm driver core");
 896 MODULE_LICENSE("GPL");