drivers/media/platform/rk3288-vpu/rk3288_vpu.c

   1 /*
   2  * Rockchip RK3288 VPU codec driver
   3  *
   4  * Copyright (C) 2014 Google, Inc.
   5  *      Tomasz Figa <tfiga@chromium.org>
   6  *
   7  * Based on s5p-mfc driver by Samsung Electronics Co., Ltd.
   8  *
   9  * Copyright (C) 2011 Samsung Electronics Co., Ltd.
  10  *
  11  * This software is licensed under the terms of the GNU General Public
  12  * License version 2, as published by the Free Software Foundation, and
  13  * may be copied, distributed, and modified under those terms.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #include "rk3288_vpu_common.h"
  22
  23 #include <linux/module.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/sched.h>
  26 #include <linux/slab.h>
  27 #include <linux/videodev2.h>
  28 #include <media/v4l2-event.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/of.h>
  31 #include <media/videobuf2-core.h>
  32 #include <media/videobuf2-dma-contig.h>
  33
  34 #include "rk3288_vpu_dec.h"
  35 #include "rk3288_vpu_enc.h"
  36 #include "rk3288_vpu_hw.h"
  37
  38 int debug;
  39 module_param(debug, int, S_IRUGO | S_IWUSR);
  40 MODULE_PARM_DESC(debug,
  41                  "Debug level - higher value produces more verbose messages");
  42
  43 /*
  44  * DMA coherent helpers.
  45  */
  46
  47 int rk3288_vpu_aux_buf_alloc(struct rk3288_vpu_dev *vpu,
  48                             struct rk3288_vpu_aux_buf *buf, size_t size)
  49 {
  50         buf->cpu = dma_alloc_coherent(vpu->dev, size, &buf->dma, GFP_KERNEL);
  51         if (!buf->cpu)
  52                 return -ENOMEM;
  53
  54         buf->size = size;
  55         return 0;
  56 }
  57
  58 void rk3288_vpu_aux_buf_free(struct rk3288_vpu_dev *vpu,
  59                              struct rk3288_vpu_aux_buf *buf)
  60 {
  61         dma_free_coherent(vpu->dev, buf->size, buf->cpu, buf->dma);
  62
  63         buf->cpu = NULL;
  64         buf->dma = 0;
  65         buf->size = 0;
  66 }
  67
  68 /*
  69  * Context scheduling.
  70  */
  71
  72 static void rk3288_vpu_prepare_run(struct rk3288_vpu_ctx *ctx)
  73 {
  74         if (ctx->run_ops->prepare_run)
  75                 ctx->run_ops->prepare_run(ctx);
  76 }
  77
  78 static void __rk3288_vpu_dequeue_run_locked(struct rk3288_vpu_ctx *ctx)
  79 {
  80         struct rk3288_vpu_buf *src, *dst;
  81
  82         /*
  83          * Since ctx was dequeued from ready_ctxs list, we know that it has
  84          * at least one buffer in each queue.
  85          */
  86         src = list_first_entry(&ctx->src_queue, struct rk3288_vpu_buf, list);
  87         dst = list_first_entry(&ctx->dst_queue, struct rk3288_vpu_buf, list);
  88
  89         list_del(&src->list);
  90         list_del(&dst->list);
  91
  92         ctx->run.src = src;
  93         ctx->run.dst = dst;
  94 }
  95
  96 static struct rk3288_vpu_ctx *
  97 rk3288_vpu_encode_after_decode_war(struct rk3288_vpu_ctx *ctx)
  98 {
  99         struct rk3288_vpu_dev *dev = ctx->dev;
 100
 101         if (dev->was_decoding && rk3288_vpu_ctx_is_encoder(ctx))
 102                 return dev->dummy_encode_ctx;
 103
 104         return ctx;
 105 }
 106
 107 static void rk3288_vpu_try_run(struct rk3288_vpu_dev *dev)
 108 {
 109         struct rk3288_vpu_ctx *ctx = NULL;
 110         unsigned long flags;
 111
 112         vpu_debug_enter();
 113
 114         spin_lock_irqsave(&dev->irqlock, flags);
 115
 116         if (list_empty(&dev->ready_ctxs) ||
 117             test_bit(VPU_SUSPENDED, &dev->state))
 118                 /* Nothing to do. */
 119                 goto out;
 120
 121         if (test_and_set_bit(VPU_RUNNING, &dev->state))
 122                 /*
 123                 * The hardware is already running. We will pick another
 124                 * run after we get the notification in rk3288_vpu_run_done().
 125                 */
 126                 goto out;
 127
 128         ctx = list_entry(dev->ready_ctxs.next, struct rk3288_vpu_ctx, list);
 129
 130         /*
 131          * WAR for corrupted hardware state when encoding directly after
 132          * certain decoding runs.
 133          *
 134          * If previous context was decoding and currently picked one is
 135          * encoding then we need to execute a dummy encode with proper
 136          * settings to reinitialize certain internal hardware state.
 137          */
 138         ctx = rk3288_vpu_encode_after_decode_war(ctx);
 139
 140         if (!rk3288_vpu_ctx_is_dummy_encode(ctx)) {
 141                 list_del_init(&ctx->list);
 142                 __rk3288_vpu_dequeue_run_locked(ctx);
 143         }
 144
 145         dev->current_ctx = ctx;
 146         dev->was_decoding = !rk3288_vpu_ctx_is_encoder(ctx);
 147
 148 out:
 149         spin_unlock_irqrestore(&dev->irqlock, flags);
 150
 151         if (ctx) {
 152                 rk3288_vpu_prepare_run(ctx);
 153                 rk3288_vpu_run(ctx);
 154         }
 155
 156         vpu_debug_leave();
 157 }
 158
 159 static void __rk3288_vpu_try_context_locked(struct rk3288_vpu_dev *dev,
 160                                             struct rk3288_vpu_ctx *ctx)
 161 {
 162         if (!list_empty(&ctx->list))
 163                 /* Context already queued. */
 164                 return;
 165
 166         if (!list_empty(&ctx->dst_queue) && !list_empty(&ctx->src_queue))
 167                 list_add_tail(&ctx->list, &dev->ready_ctxs);
 168 }
 169
 170 void rk3288_vpu_run_done(struct rk3288_vpu_ctx *ctx,
 171                          enum vb2_buffer_state result)
 172 {
 173         struct rk3288_vpu_dev *dev = ctx->dev;
 174         unsigned long flags;
 175
 176         vpu_debug_enter();
 177
 178         if (ctx->run_ops->run_done)
 179                 ctx->run_ops->run_done(ctx, result);
 180
 181         if (!rk3288_vpu_ctx_is_dummy_encode(ctx)) {
 182                 struct vb2_buffer *src = &ctx->run.src->b;
 183                 struct vb2_buffer *dst = &ctx->run.dst->b;
 184
 185                 dst->v4l2_buf.timestamp = src->v4l2_buf.timestamp;
 186                 vb2_buffer_done(&ctx->run.src->b, result);
 187                 vb2_buffer_done(&ctx->run.dst->b, result);
 188         }
 189
 190         dev->current_ctx = NULL;
 191         wake_up_all(&dev->run_wq);
 192
 193         spin_lock_irqsave(&dev->irqlock, flags);
 194
 195         __rk3288_vpu_try_context_locked(dev, ctx);
 196         clear_bit(VPU_RUNNING, &dev->state);
 197
 198         spin_unlock_irqrestore(&dev->irqlock, flags);
 199
 200         /* Try scheduling another run to see if we have anything left to do. */
 201         rk3288_vpu_try_run(dev);
 202
 203         vpu_debug_leave();
 204 }
 205
 206 void rk3288_vpu_try_context(struct rk3288_vpu_dev *dev,
 207                             struct rk3288_vpu_ctx *ctx)
 208 {
 209         unsigned long flags;
 210
 211         vpu_debug_enter();
 212
 213         spin_lock_irqsave(&dev->irqlock, flags);
 214
 215         __rk3288_vpu_try_context_locked(dev, ctx);
 216
 217         spin_unlock_irqrestore(&dev->irqlock, flags);
 218
 219         rk3288_vpu_try_run(dev);
 220
 221         vpu_debug_enter();
 222 }
 223
 224 /*
 225  * Control registration.
 226  */
 227
 228 #define IS_VPU_PRIV(x) ((V4L2_CTRL_ID2CLASS(x) == V4L2_CTRL_CLASS_MPEG) && \
 229                           V4L2_CTRL_DRIVER_PRIV(x))
 230
 231 int rk3288_vpu_ctrls_setup(struct rk3288_vpu_ctx *ctx,
 232                            const struct v4l2_ctrl_ops *ctrl_ops,
 233                            struct rk3288_vpu_control *controls,
 234                            unsigned num_ctrls,
 235                            const char *const *(*get_menu)(u32))
 236 {
 237         struct v4l2_ctrl_config cfg;
 238         int i;
 239
 240         if (num_ctrls > ARRAY_SIZE(ctx->ctrls)) {
 241                 vpu_err("context control array not large enough\n");
 242                 return -ENOSPC;
 243         }
 244
 245         v4l2_ctrl_handler_init(&ctx->ctrl_handler, num_ctrls);
 246         if (ctx->ctrl_handler.error) {
 247                 vpu_err("v4l2_ctrl_handler_init failed\n");
 248                 return ctx->ctrl_handler.error;
 249         }
 250
 251         for (i = 0; i < num_ctrls; i++) {
 252                 if (IS_VPU_PRIV(controls[i].id)
 253                     || controls[i].id >= V4L2_CID_CUSTOM_BASE
 254                     || controls[i].type == V4L2_CTRL_TYPE_PRIVATE) {
 255                         memset(&cfg, 0, sizeof(struct v4l2_ctrl_config));
 256
 257                         cfg.ops = ctrl_ops;
 258                         cfg.id = controls[i].id;
 259                         cfg.min = controls[i].minimum;
 260                         cfg.max = controls[i].maximum;
 261                         cfg.max_stores = controls[i].max_stores;
 262                         cfg.def = controls[i].default_value;
 263                         cfg.name = controls[i].name;
 264                         cfg.type = controls[i].type;
 265                         cfg.elem_size = controls[i].elem_size;
 266                         memcpy(cfg.dims, controls[i].dims, sizeof(cfg.dims));
 267
 268                         if (cfg.type == V4L2_CTRL_TYPE_MENU) {
 269                                 cfg.menu_skip_mask = cfg.menu_skip_mask;
 270                                 cfg.qmenu = get_menu(cfg.id);
 271                         } else {
 272                                 cfg.step = controls[i].step;
 273                         }
 274
 275                         ctx->ctrls[i] = v4l2_ctrl_new_custom(
 276                                 &ctx->ctrl_handler, &cfg, NULL);
 277                 } else {
 278                         if (controls[i].type == V4L2_CTRL_TYPE_MENU) {
 279                                 ctx->ctrls[i] =
 280                                     v4l2_ctrl_new_std_menu
 281                                         (&ctx->ctrl_handler,
 282                                          ctrl_ops,
 283                                          controls[i].id,
 284                                          controls[i].maximum,
 285                                          0,
 286                                          controls[i].
 287                                          default_value);
 288                         } else {
 289                                 ctx->ctrls[i] =
 290                                     v4l2_ctrl_new_std(&ctx->ctrl_handler,
 291                                                       ctrl_ops,
 292                                                       controls[i].id,
 293                                                       controls[i].minimum,
 294                                                       controls[i].maximum,
 295                                                       controls[i].step,
 296                                                       controls[i].
 297                                                       default_value);
 298                         }
 299                 }
 300
 301                 if (ctx->ctrl_handler.error) {
 302                         vpu_err("Adding control (%d) failed\n", i);
 303                         return ctx->ctrl_handler.error;
 304                 }
 305
 306                 if (controls[i].is_volatile && ctx->ctrls[i])
 307                         ctx->ctrls[i]->flags |= V4L2_CTRL_FLAG_VOLATILE;
 308                 if (controls[i].is_read_only && ctx->ctrls[i])
 309                         ctx->ctrls[i]->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 310                 if (controls[i].can_store && ctx->ctrls[i])
 311                         ctx->ctrls[i]->flags |= V4L2_CTRL_FLAG_CAN_STORE;
 312         }
 313
 314         v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 315         ctx->num_ctrls = num_ctrls;
 316         return 0;
 317 }
 318
 319 void rk3288_vpu_ctrls_delete(struct rk3288_vpu_ctx *ctx)
 320 {
 321         int i;
 322
 323         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 324         for (i = 0; i < ctx->num_ctrls; i++)
 325                 ctx->ctrls[i] = NULL;
 326 }
 327
 328 /*
 329  * V4L2 file operations.
 330  */
 331
 332 static int rk3288_vpu_open(struct file *filp)
 333 {
 334         struct video_device *vdev = video_devdata(filp);
 335         struct rk3288_vpu_dev *dev = video_drvdata(filp);
 336         struct rk3288_vpu_ctx *ctx = NULL;
 337         struct vb2_queue *q;
 338         int ret = 0;
 339
 340         /*
 341          * We do not need any extra locking here, because we operate only
 342          * on local data here, except reading few fields from dev, which
 343          * do not change through device's lifetime (which is guaranteed by
 344          * reference on module from open()) and V4L2 internal objects (such
 345          * as vdev and ctx->fh), which have proper locking done in respective
 346          * helper functions used here.
 347          */
 348
 349         vpu_debug_enter();
 350
 351         /* Allocate memory for context */
 352         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 353         if (!ctx) {
 354                 ret = -ENOMEM;
 355                 goto err_leave;
 356         }
 357
 358         v4l2_fh_init(&ctx->fh, video_devdata(filp));
 359         filp->private_data = &ctx->fh;
 360         v4l2_fh_add(&ctx->fh);
 361         ctx->dev = dev;
 362         INIT_LIST_HEAD(&ctx->src_queue);
 363         INIT_LIST_HEAD(&ctx->dst_queue);
 364         INIT_LIST_HEAD(&ctx->list);
 365
 366         if (vdev == dev->vfd_enc) {
 367                 /* only for encoder */
 368                 ret = rk3288_vpu_enc_init(ctx);
 369                 if (ret) {
 370                         vpu_err("Failed to initialize encoder context\n");
 371                         goto err_fh_free;
 372                 }
 373         } else if (vdev == dev->vfd_dec) {
 374                 /* only for decoder */
 375                 ret = rk3288_vpu_dec_init(ctx);
 376                 if (ret) {
 377                         vpu_err("Failed to initialize decoder context\n");
 378                         goto err_fh_free;
 379                 }
 380         } else {
 381                 ret = -ENOENT;
 382                 goto err_fh_free;
 383         }
 384         ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 385
 386         /* Init videobuf2 queue for CAPTURE */
 387         q = &ctx->vq_dst;
 388         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 389         q->drv_priv = &ctx->fh;
 390         q->io_modes = VB2_MMAP | VB2_USERPTR;
 391         q->lock = &dev->vpu_mutex;
 392         q->buf_struct_size = sizeof(struct rk3288_vpu_buf);
 393
 394         if (vdev == dev->vfd_enc)
 395                 q->ops = get_enc_queue_ops();
 396         else if (vdev == dev->vfd_dec)
 397                 q->ops = get_dec_queue_ops();
 398
 399         q->mem_ops = &vb2_dma_contig_memops;
 400         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 401
 402         ret = vb2_queue_init(q);
 403         if (ret) {
 404                 vpu_err("Failed to initialize videobuf2 queue(capture)\n");
 405                 goto err_enc_dec_exit;
 406         }
 407
 408         /* Init videobuf2 queue for OUTPUT */
 409         q = &ctx->vq_src;
 410         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 411         q->drv_priv = &ctx->fh;
 412         q->io_modes = VB2_MMAP | VB2_USERPTR;
 413         q->lock = &dev->vpu_mutex;
 414         q->buf_struct_size = sizeof(struct rk3288_vpu_buf);
 415
 416         if (vdev == dev->vfd_enc)
 417                 q->ops = get_enc_queue_ops();
 418         else if (vdev == dev->vfd_dec)
 419                 q->ops = get_dec_queue_ops();
 420
 421         q->mem_ops = &vb2_dma_contig_memops;
 422         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 423
 424         ret = vb2_queue_init(q);
 425         if (ret) {
 426                 vpu_err("Failed to initialize videobuf2 queue(output)\n");
 427                 goto err_vq_dst_release;
 428         }
 429
 430         vpu_debug_leave();
 431
 432         return 0;
 433
 434 err_vq_dst_release:
 435         vb2_queue_release(&ctx->vq_dst);
 436 err_enc_dec_exit:
 437         if (vdev == dev->vfd_enc)
 438                 rk3288_vpu_enc_exit(ctx);
 439         else if (vdev == dev->vfd_dec)
 440                 rk3288_vpu_dec_exit(ctx);
 441 err_fh_free:
 442         v4l2_fh_del(&ctx->fh);
 443         v4l2_fh_exit(&ctx->fh);
 444         kfree(ctx);
 445 err_leave:
 446         vpu_debug_leave();
 447
 448         return ret;
 449 }
 450
 451 static int rk3288_vpu_release(struct file *filp)
 452 {
 453         struct rk3288_vpu_ctx *ctx = fh_to_ctx(filp->private_data);
 454         struct video_device *vdev = video_devdata(filp);
 455         struct rk3288_vpu_dev *dev = ctx->dev;
 456
 457         /*
 458          * No need for extra locking because this was the last reference
 459          * to this file.
 460          */
 461
 462         vpu_debug_enter();
 463
 464         /*
 465          * vb2_queue_release() ensures that streaming is stopped, which
 466          * in turn means that there are no frames still being processed
 467          * by hardware.
 468          */
 469         vb2_queue_release(&ctx->vq_src);
 470         vb2_queue_release(&ctx->vq_dst);
 471
 472         v4l2_fh_del(&ctx->fh);
 473         v4l2_fh_exit(&ctx->fh);
 474
 475         if (vdev == dev->vfd_enc)
 476                 rk3288_vpu_enc_exit(ctx);
 477         else if (vdev == dev->vfd_dec)
 478                 rk3288_vpu_dec_exit(ctx);
 479
 480         kfree(ctx);
 481
 482         vpu_debug_leave();
 483
 484         return 0;
 485 }
 486
 487 static unsigned int rk3288_vpu_poll(struct file *filp,
 488                                     struct poll_table_struct *wait)
 489 {
 490         struct rk3288_vpu_ctx *ctx = fh_to_ctx(filp->private_data);
 491         struct vb2_queue *src_q, *dst_q;
 492         struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
 493         unsigned int rc = 0;
 494         unsigned long flags;
 495
 496         vpu_debug_enter();
 497
 498         src_q = &ctx->vq_src;
 499         dst_q = &ctx->vq_dst;
 500
 501         /*
 502          * There has to be at least one buffer queued on each queued_list, which
 503          * means either in driver already or waiting for driver to claim it
 504          * and start processing.
 505          */
 506         if ((!vb2_is_streaming(src_q) || list_empty(&src_q->queued_list)) &&
 507             (!vb2_is_streaming(dst_q) || list_empty(&dst_q->queued_list))) {
 508                 vpu_debug(0, "src q streaming %d, dst q streaming %d, src list empty(%d), dst list empty(%d)\n",
 509                                 src_q->streaming, dst_q->streaming,
 510                                 list_empty(&src_q->queued_list),
 511                                 list_empty(&dst_q->queued_list));
 512                 return POLLERR;
 513         }
 514
 515         poll_wait(filp, &ctx->fh.wait, wait);
 516         poll_wait(filp, &src_q->done_wq, wait);
 517         poll_wait(filp, &dst_q->done_wq, wait);
 518
 519         if (v4l2_event_pending(&ctx->fh))
 520                 rc |= POLLPRI;
 521
 522         spin_lock_irqsave(&src_q->done_lock, flags);
 523
 524         if (!list_empty(&src_q->done_list))
 525                 src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer,
 526                                                 done_entry);
 527
 528         if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE ||
 529                         src_vb->state == VB2_BUF_STATE_ERROR))
 530                 rc |= POLLOUT | POLLWRNORM;
 531
 532         spin_unlock_irqrestore(&src_q->done_lock, flags);
 533
 534         spin_lock_irqsave(&dst_q->done_lock, flags);
 535
 536         if (!list_empty(&dst_q->done_list))
 537                 dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer,
 538                                                 done_entry);
 539
 540         if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE ||
 541                         dst_vb->state == VB2_BUF_STATE_ERROR))
 542                 rc |= POLLIN | POLLRDNORM;
 543
 544         spin_unlock_irqrestore(&dst_q->done_lock, flags);
 545
 546         return rc;
 547 }
 548
 549 static int rk3288_vpu_mmap(struct file *filp, struct vm_area_struct *vma)
 550 {
 551         struct rk3288_vpu_ctx *ctx = fh_to_ctx(filp->private_data);
 552         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
 553         int ret;
 554
 555         vpu_debug_enter();
 556
 557         if (offset < DST_QUEUE_OFF_BASE) {
 558                 vpu_debug(4, "mmaping source\n");
 559
 560                 ret = vb2_mmap(&ctx->vq_src, vma);
 561         } else {                /* capture */
 562                 vpu_debug(4, "mmaping destination\n");
 563
 564                 vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
 565                 ret = vb2_mmap(&ctx->vq_dst, vma);
 566         }
 567
 568         vpu_debug_leave();
 569
 570         return ret;
 571 }
 572
 573 static const struct v4l2_file_operations rk3288_vpu_fops = {
 574         .owner = THIS_MODULE,
 575         .open = rk3288_vpu_open,
 576         .release = rk3288_vpu_release,
 577         .poll = rk3288_vpu_poll,
 578         .unlocked_ioctl = video_ioctl2,
 579         .mmap = rk3288_vpu_mmap,
 580 };
 581
 582 /*
 583  * Platform driver.
 584  */
 585
 586 static int rk3288_vpu_probe(struct platform_device *pdev)
 587 {
 588         struct rk3288_vpu_dev *vpu = NULL;
 589         DEFINE_DMA_ATTRS(attrs_novm);
 590         struct video_device *vfd;
 591         int ret = 0;
 592
 593         vpu_debug_enter();
 594
 595         vpu = devm_kzalloc(&pdev->dev, sizeof(*vpu), GFP_KERNEL);
 596         if (!vpu)
 597                 return -ENOMEM;
 598
 599         vpu->dev = &pdev->dev;
 600         vpu->pdev = pdev;
 601         mutex_init(&vpu->vpu_mutex);
 602         spin_lock_init(&vpu->irqlock);
 603         INIT_LIST_HEAD(&vpu->ready_ctxs);
 604         init_waitqueue_head(&vpu->run_wq);
 605
 606         ret = rk3288_vpu_hw_probe(vpu);
 607         if (ret) {
 608                 dev_err(&pdev->dev, "vcodec_hw_probe failed\n");
 609                 goto err_hw_probe;
 610         }
 611
 612         dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs_novm);
 613         vpu->alloc_ctx = vb2_dma_contig_init_ctx_attrs(&pdev->dev,
 614                                                                 &attrs_novm);
 615         if (IS_ERR(vpu->alloc_ctx)) {
 616                 ret = PTR_ERR(vpu->alloc_ctx);
 617                 goto err_dma_contig;
 618         }
 619
 620         vpu->alloc_ctx_vm = vb2_dma_contig_init_ctx(&pdev->dev);
 621         if (IS_ERR(vpu->alloc_ctx_vm)) {
 622                 ret = PTR_ERR(vpu->alloc_ctx_vm);
 623                 goto err_dma_contig_vm;
 624         }
 625
 626         ret = v4l2_device_register(&pdev->dev, &vpu->v4l2_dev);
 627         if (ret) {
 628                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 629                 goto err_v4l2_dev_reg;
 630         }
 631
 632         platform_set_drvdata(pdev, vpu);
 633
 634         ret = rk3288_vpu_enc_init_dummy_ctx(vpu);
 635         if (ret) {
 636                 dev_err(&pdev->dev, "Failed to create dummy encode context\n");
 637                 goto err_dummy_enc;
 638         }
 639
 640         /* encoder */
 641         vfd = video_device_alloc();
 642         if (!vfd) {
 643                 v4l2_err(&vpu->v4l2_dev, "Failed to allocate video device\n");
 644                 ret = -ENOMEM;
 645                 goto err_enc_alloc;
 646         }
 647
 648         vfd->fops = &rk3288_vpu_fops;
 649         vfd->ioctl_ops = get_enc_v4l2_ioctl_ops();
 650         vfd->release = video_device_release;
 651         vfd->lock = &vpu->vpu_mutex;
 652         vfd->v4l2_dev = &vpu->v4l2_dev;
 653         vfd->vfl_dir = VFL_DIR_M2M;
 654         snprintf(vfd->name, sizeof(vfd->name), "%s", RK3288_VPU_ENC_NAME);
 655         vpu->vfd_enc = vfd;
 656
 657         video_set_drvdata(vfd, vpu);
 658
 659         ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
 660         if (ret) {
 661                 v4l2_err(&vpu->v4l2_dev, "Failed to register video device\n");
 662                 video_device_release(vfd);
 663                 goto err_enc_reg;
 664         }
 665
 666         v4l2_info(&vpu->v4l2_dev,
 667                 "Rockchip RK3288 VPU encoder registered as /vpu/video%d\n",
 668                 vfd->num);
 669
 670         /* decoder */
 671         vfd = video_device_alloc();
 672         if (!vfd) {
 673                 v4l2_err(&vpu->v4l2_dev, "Failed to allocate video device\n");
 674                 ret = -ENOMEM;
 675                 goto err_dec_alloc;
 676         }
 677
 678         vfd->fops = &rk3288_vpu_fops;
 679         vfd->ioctl_ops = get_dec_v4l2_ioctl_ops();
 680         vfd->release = video_device_release;
 681         vfd->lock = &vpu->vpu_mutex;
 682         vfd->v4l2_dev = &vpu->v4l2_dev;
 683         vfd->vfl_dir = VFL_DIR_M2M;
 684         snprintf(vfd->name, sizeof(vfd->name), "%s", RK3288_VPU_DEC_NAME);
 685         vpu->vfd_dec = vfd;
 686
 687         video_set_drvdata(vfd, vpu);
 688
 689         ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
 690         if (ret) {
 691                 v4l2_err(&vpu->v4l2_dev, "Failed to register video device\n");
 692                 video_device_release(vfd);
 693                 goto err_dec_reg;
 694         }
 695
 696         v4l2_info(&vpu->v4l2_dev,
 697                 "Rockchip RK3288 VPU decoder registered as /vpu/video%d\n",
 698                 vfd->num);
 699
 700         vpu_debug_leave();
 701
 702         return 0;
 703
 704 err_dec_reg:
 705         video_device_release(vpu->vfd_dec);
 706 err_dec_alloc:
 707         video_unregister_device(vpu->vfd_enc);
 708 err_enc_reg:
 709         video_device_release(vpu->vfd_enc);
 710 err_enc_alloc:
 711         rk3288_vpu_enc_free_dummy_ctx(vpu);
 712 err_dummy_enc:
 713         v4l2_device_unregister(&vpu->v4l2_dev);
 714 err_v4l2_dev_reg:
 715         vb2_dma_contig_cleanup_ctx(vpu->alloc_ctx_vm);
 716 err_dma_contig_vm:
 717         vb2_dma_contig_cleanup_ctx(vpu->alloc_ctx);
 718 err_dma_contig:
 719         rk3288_vpu_hw_remove(vpu);
 720 err_hw_probe:
 721         pr_debug("%s-- with error\n", __func__);
 722         vpu_debug_leave();
 723
 724         return ret;
 725 }
 726
 727 static int rk3288_vpu_remove(struct platform_device *pdev)
 728 {
 729         struct rk3288_vpu_dev *vpu = platform_get_drvdata(pdev);
 730
 731         vpu_debug_enter();
 732
 733         v4l2_info(&vpu->v4l2_dev, "Removing %s\n", pdev->name);
 734
 735         /*
 736          * We are safe here assuming that .remove() got called as
 737          * a result of module removal, which guarantees that all
 738          * contexts have been released.
 739          */
 740
 741         video_unregister_device(vpu->vfd_dec);
 742         video_unregister_device(vpu->vfd_enc);
 743         rk3288_vpu_enc_free_dummy_ctx(vpu);
 744         v4l2_device_unregister(&vpu->v4l2_dev);
 745         vb2_dma_contig_cleanup_ctx(vpu->alloc_ctx_vm);
 746         vb2_dma_contig_cleanup_ctx(vpu->alloc_ctx);
 747         rk3288_vpu_hw_remove(vpu);
 748
 749         vpu_debug_leave();
 750
 751         return 0;
 752 }
 753
 754 static struct platform_device_id vpu_driver_ids[] = {
 755         { .name = "rk3288-vpu", },
 756         { /* sentinel */ }
 757 };
 758
 759 MODULE_DEVICE_TABLE(platform, vpu_driver_ids);
 760
 761 #ifdef CONFIG_OF
 762 static const struct of_device_id of_rk3288_vpu_match[] = {
 763         { .compatible = "rockchip,rk3288-vpu", },
 764         { /* sentinel */ }
 765 };
 766 MODULE_DEVICE_TABLE(of, of_rk3288_vpu_match);
 767 #endif
 768
 769 #ifdef CONFIG_PM_SLEEP
 770 static int rk3288_vpu_suspend(struct device *dev)
 771 {
 772         struct rk3288_vpu_dev *vpu = dev_get_drvdata(dev);
 773
 774         set_bit(VPU_SUSPENDED, &vpu->state);
 775         wait_event(vpu->run_wq, vpu->current_ctx == NULL);
 776
 777         return 0;
 778 }
 779
 780 static int rk3288_vpu_resume(struct device *dev)
 781 {
 782         struct rk3288_vpu_dev *vpu = dev_get_drvdata(dev);
 783
 784         clear_bit(VPU_SUSPENDED, &vpu->state);
 785         rk3288_vpu_try_run(vpu);
 786
 787         return 0;
 788 }
 789 #endif
 790
 791 static const struct dev_pm_ops rk3288_vpu_pm_ops = {
 792         SET_SYSTEM_SLEEP_PM_OPS(rk3288_vpu_suspend, rk3288_vpu_resume)
 793 };
 794
 795 static struct platform_driver rk3288_vpu_driver = {
 796         .probe = rk3288_vpu_probe,
 797         .remove = rk3288_vpu_remove,
 798         .id_table = vpu_driver_ids,
 799         .driver = {
 800                    .name = RK3288_VPU_NAME,
 801                    .owner = THIS_MODULE,
 802                    .of_match_table = of_match_ptr(of_rk3288_vpu_match),
 803                    .pm = &rk3288_vpu_pm_ops,
 804         },
 805 };
 806 module_platform_driver(rk3288_vpu_driver);
 807
 808 MODULE_LICENSE("GPL v2");
 809 MODULE_AUTHOR("Alpha Lin <Alpha.Lin@Rock-Chips.com>");
 810 MODULE_AUTHOR("Tomasz Figa <tfiga@chromium.org>");
 811 MODULE_DESCRIPTION("Rockchip RK3288 VPU codec driver");