drivers/staging/media/hantro/hantro_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Hantro VPU codec driver
   4  *
   5  * Copyright (C) 2018 Collabora, Ltd.
   6  * Copyright 2018 Google LLC.
   7  *      Tomasz Figa <tfiga@chromium.org>
   8  *
   9  * Based on s5p-mfc driver by Samsung Electronics Co., Ltd.
  10  * Copyright (C) 2011 Samsung Electronics Co., Ltd.
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/slab.h>
  20 #include <linux/videodev2.h>
  21 #include <linux/workqueue.h>
  22 #include <media/v4l2-event.h>
  23 #include <media/v4l2-mem2mem.h>
  24 #include <media/videobuf2-core.h>
  25 #include <media/videobuf2-vmalloc.h>
  26
  27 #include "hantro_v4l2.h"
  28 #include "hantro.h"
  29 #include "hantro_hw.h"
  30
  31 #define DRIVER_NAME "hantro-vpu"
  32
  33 int hantro_debug;
  34 module_param_named(debug, hantro_debug, int, 0644);
  35 MODULE_PARM_DESC(debug,
  36                  "Debug level - higher value produces more verbose messages");
  37
  38 void *hantro_get_ctrl(struct hantro_ctx *ctx, u32 id)
  39 {
  40         struct v4l2_ctrl *ctrl;
  41
  42         ctrl = v4l2_ctrl_find(&ctx->ctrl_handler, id);
  43         return ctrl ? ctrl->p_cur.p : NULL;
  44 }
  45
  46 dma_addr_t hantro_get_ref(struct vb2_queue *q, u64 ts)
  47 {
  48         struct vb2_buffer *buf;
  49         int index;
  50
  51         index = vb2_find_timestamp(q, ts, 0);
  52         if (index < 0)
  53                 return 0;
  54         buf = vb2_get_buffer(q, index);
  55         return vb2_dma_contig_plane_dma_addr(buf, 0);
  56 }
  57
  58 static int
  59 hantro_enc_buf_finish(struct hantro_ctx *ctx, struct vb2_buffer *buf,
  60                       unsigned int bytesused)
  61 {
  62         size_t avail_size;
  63
  64         avail_size = vb2_plane_size(buf, 0) - ctx->vpu_dst_fmt->header_size;
  65         if (bytesused > avail_size)
  66                 return -EINVAL;
  67         /*
  68          * The bounce buffer is only for the JPEG encoder.
  69          * TODO: Rework the JPEG encoder to eliminate the need
  70          * for a bounce buffer.
  71          */
  72         if (ctx->jpeg_enc.bounce_buffer.cpu) {
  73                 memcpy(vb2_plane_vaddr(buf, 0) +
  74                        ctx->vpu_dst_fmt->header_size,
  75                        ctx->jpeg_enc.bounce_buffer.cpu, bytesused);
  76         }
  77         buf->planes[0].bytesused =
  78                 ctx->vpu_dst_fmt->header_size + bytesused;
  79         return 0;
  80 }
  81
  82 static int
  83 hantro_dec_buf_finish(struct hantro_ctx *ctx, struct vb2_buffer *buf,
  84                       unsigned int bytesused)
  85 {
  86         /* For decoders set bytesused as per the output picture. */
  87         buf->planes[0].bytesused = ctx->dst_fmt.plane_fmt[0].sizeimage;
  88         return 0;
  89 }
  90
  91 static void hantro_job_finish(struct hantro_dev *vpu,
  92                               struct hantro_ctx *ctx,
  93                               unsigned int bytesused,
  94                               enum vb2_buffer_state result)
  95 {
  96         struct vb2_v4l2_buffer *src, *dst;
  97         int ret;
  98
  99         pm_runtime_mark_last_busy(vpu->dev);
 100         pm_runtime_put_autosuspend(vpu->dev);
 101         clk_bulk_disable(vpu->variant->num_clocks, vpu->clocks);
 102
 103         src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 104         dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 105
 106         if (WARN_ON(!src))
 107                 return;
 108         if (WARN_ON(!dst))
 109                 return;
 110
 111         src->sequence = ctx->sequence_out++;
 112         dst->sequence = ctx->sequence_cap++;
 113
 114         v4l2_m2m_buf_copy_metadata(src, dst, true);
 115
 116         ret = ctx->buf_finish(ctx, &dst->vb2_buf, bytesused);
 117         if (ret)
 118                 result = VB2_BUF_STATE_ERROR;
 119
 120         v4l2_m2m_buf_done(src, result);
 121         v4l2_m2m_buf_done(dst, result);
 122
 123         v4l2_m2m_job_finish(vpu->m2m_dev, ctx->fh.m2m_ctx);
 124 }
 125
 126 void hantro_irq_done(struct hantro_dev *vpu, unsigned int bytesused,
 127                      enum vb2_buffer_state result)
 128 {
 129         struct hantro_ctx *ctx =
 130                 v4l2_m2m_get_curr_priv(vpu->m2m_dev);
 131
 132         /*
 133          * If cancel_delayed_work returns false
 134          * the timeout expired. The watchdog is running,
 135          * and will take care of finishing the job.
 136          */
 137         if (cancel_delayed_work(&vpu->watchdog_work))
 138                 hantro_job_finish(vpu, ctx, bytesused, result);
 139 }
 140
 141 void hantro_watchdog(struct work_struct *work)
 142 {
 143         struct hantro_dev *vpu;
 144         struct hantro_ctx *ctx;
 145
 146         vpu = container_of(to_delayed_work(work),
 147                            struct hantro_dev, watchdog_work);
 148         ctx = v4l2_m2m_get_curr_priv(vpu->m2m_dev);
 149         if (ctx) {
 150                 vpu_err("frame processing timed out!\n");
 151                 ctx->codec_ops->reset(ctx);
 152                 hantro_job_finish(vpu, ctx, 0, VB2_BUF_STATE_ERROR);
 153         }
 154 }
 155
 156 static void device_run(void *priv)
 157 {
 158         struct hantro_ctx *ctx = priv;
 159         int ret;
 160
 161         ret = clk_bulk_enable(ctx->dev->variant->num_clocks, ctx->dev->clocks);
 162         if (ret)
 163                 goto err_cancel_job;
 164         ret = pm_runtime_get_sync(ctx->dev->dev);
 165         if (ret < 0)
 166                 goto err_cancel_job;
 167
 168         ctx->codec_ops->run(ctx);
 169         return;
 170
 171 err_cancel_job:
 172         hantro_job_finish(ctx->dev, ctx, 0, VB2_BUF_STATE_ERROR);
 173 }
 174
 175 bool hantro_is_encoder_ctx(const struct hantro_ctx *ctx)
 176 {
 177         return ctx->buf_finish == hantro_enc_buf_finish;
 178 }
 179
 180 static struct v4l2_m2m_ops vpu_m2m_ops = {
 181         .device_run = device_run,
 182 };
 183
 184 static int
 185 queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
 186 {
 187         struct hantro_ctx *ctx = priv;
 188         int ret;
 189
 190         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 191         src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 192         src_vq->drv_priv = ctx;
 193         src_vq->ops = &hantro_queue_ops;
 194         src_vq->mem_ops = &vb2_dma_contig_memops;
 195
 196         /*
 197          * Driver does mostly sequential access, so sacrifice TLB efficiency
 198          * for faster allocation. Also, no CPU access on the source queue,
 199          * so no kernel mapping needed.
 200          */
 201         src_vq->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES |
 202                             DMA_ATTR_NO_KERNEL_MAPPING;
 203         src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 204         src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 205         src_vq->lock = &ctx->dev->vpu_mutex;
 206         src_vq->dev = ctx->dev->v4l2_dev.dev;
 207         src_vq->supports_requests = true;
 208
 209         ret = vb2_queue_init(src_vq);
 210         if (ret)
 211                 return ret;
 212
 213         /*
 214          * When encoding, the CAPTURE queue doesn't need dma memory,
 215          * as the CPU needs to create the JPEG frames, from the
 216          * hardware-produced JPEG payload.
 217          *
 218          * For the DMA destination buffer, we use a bounce buffer.
 219          */
 220         if (hantro_is_encoder_ctx(ctx)) {
 221                 dst_vq->mem_ops = &vb2_vmalloc_memops;
 222         } else {
 223                 dst_vq->bidirectional = true;
 224                 dst_vq->mem_ops = &vb2_dma_contig_memops;
 225                 dst_vq->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES |
 226                                     DMA_ATTR_NO_KERNEL_MAPPING;
 227         }
 228
 229         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 230         dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 231         dst_vq->drv_priv = ctx;
 232         dst_vq->ops = &hantro_queue_ops;
 233         dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 234         dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 235         dst_vq->lock = &ctx->dev->vpu_mutex;
 236         dst_vq->dev = ctx->dev->v4l2_dev.dev;
 237
 238         return vb2_queue_init(dst_vq);
 239 }
 240
 241 static int hantro_s_ctrl(struct v4l2_ctrl *ctrl)
 242 {
 243         struct hantro_ctx *ctx;
 244
 245         ctx = container_of(ctrl->handler,
 246                            struct hantro_ctx, ctrl_handler);
 247
 248         vpu_debug(1, "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);
 249
 250         switch (ctrl->id) {
 251         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
 252                 ctx->jpeg_quality = ctrl->val;
 253                 break;
 254         default:
 255                 return -EINVAL;
 256         }
 257
 258         return 0;
 259 }
 260
 261 static const struct v4l2_ctrl_ops hantro_ctrl_ops = {
 262         .s_ctrl = hantro_s_ctrl,
 263 };
 264
 265 static struct hantro_ctrl controls[] = {
 266         {
 267                 .id = V4L2_CID_JPEG_COMPRESSION_QUALITY,
 268                 .codec = HANTRO_JPEG_ENCODER,
 269                 .cfg = {
 270                         .min = 5,
 271                         .max = 100,
 272                         .step = 1,
 273                         .def = 50,
 274                 },
 275         }, {
 276                 .id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
 277                 .codec = HANTRO_MPEG2_DECODER,
 278                 .cfg = {
 279                         .elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params),
 280                 },
 281         }, {
 282                 .id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
 283                 .codec = HANTRO_MPEG2_DECODER,
 284                 .cfg = {
 285                         .elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization),
 286                 },
 287         },
 288 };
 289
 290 static int hantro_ctrls_setup(struct hantro_dev *vpu,
 291                               struct hantro_ctx *ctx,
 292                               int allowed_codecs)
 293 {
 294         int i, num_ctrls = ARRAY_SIZE(controls);
 295
 296         v4l2_ctrl_handler_init(&ctx->ctrl_handler, num_ctrls);
 297
 298         for (i = 0; i < num_ctrls; i++) {
 299                 if (!(allowed_codecs & controls[i].codec))
 300                         continue;
 301                 if (!controls[i].cfg.elem_size) {
 302                         v4l2_ctrl_new_std(&ctx->ctrl_handler,
 303                                           &hantro_ctrl_ops,
 304                                           controls[i].id, controls[i].cfg.min,
 305                                           controls[i].cfg.max,
 306                                           controls[i].cfg.step,
 307                                           controls[i].cfg.def);
 308                 } else {
 309                         controls[i].cfg.id = controls[i].id;
 310                         v4l2_ctrl_new_custom(&ctx->ctrl_handler,
 311                                              &controls[i].cfg, NULL);
 312                 }
 313
 314                 if (ctx->ctrl_handler.error) {
 315                         vpu_err("Adding control (%d) failed %d\n",
 316                                 controls[i].id,
 317                                 ctx->ctrl_handler.error);
 318                         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 319                         return ctx->ctrl_handler.error;
 320                 }
 321         }
 322         return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 323 }
 324
 325 /*
 326  * V4L2 file operations.
 327  */
 328
 329 static int hantro_open(struct file *filp)
 330 {
 331         struct hantro_dev *vpu = video_drvdata(filp);
 332         struct video_device *vdev = video_devdata(filp);
 333         struct hantro_func *func = hantro_vdev_to_func(vdev);
 334         struct hantro_ctx *ctx;
 335         int allowed_codecs, ret;
 336
 337         /*
 338          * We do not need any extra locking here, because we operate only
 339          * on local data here, except reading few fields from dev, which
 340          * do not change through device's lifetime (which is guaranteed by
 341          * reference on module from open()) and V4L2 internal objects (such
 342          * as vdev and ctx->fh), which have proper locking done in respective
 343          * helper functions used here.
 344          */
 345
 346         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 347         if (!ctx)
 348                 return -ENOMEM;
 349
 350         ctx->dev = vpu;
 351         if (func->id == MEDIA_ENT_F_PROC_VIDEO_ENCODER) {
 352                 allowed_codecs = vpu->variant->codec & HANTRO_ENCODERS;
 353                 ctx->buf_finish = hantro_enc_buf_finish;
 354                 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(vpu->m2m_dev, ctx,
 355                                                     queue_init);
 356         } else if (func->id == MEDIA_ENT_F_PROC_VIDEO_DECODER) {
 357                 allowed_codecs = vpu->variant->codec & HANTRO_DECODERS;
 358                 ctx->buf_finish = hantro_dec_buf_finish;
 359                 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(vpu->m2m_dev, ctx,
 360                                                     queue_init);
 361         } else {
 362                 ctx->fh.m2m_ctx = ERR_PTR(-ENODEV);
 363         }
 364         if (IS_ERR(ctx->fh.m2m_ctx)) {
 365                 ret = PTR_ERR(ctx->fh.m2m_ctx);
 366                 kfree(ctx);
 367                 return ret;
 368         }
 369
 370         v4l2_fh_init(&ctx->fh, vdev);
 371         filp->private_data = &ctx->fh;
 372         v4l2_fh_add(&ctx->fh);
 373
 374         hantro_reset_fmts(ctx);
 375
 376         ret = hantro_ctrls_setup(vpu, ctx, allowed_codecs);
 377         if (ret) {
 378                 vpu_err("Failed to set up controls\n");
 379                 goto err_fh_free;
 380         }
 381         ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 382
 383         return 0;
 384
 385 err_fh_free:
 386         v4l2_fh_del(&ctx->fh);
 387         v4l2_fh_exit(&ctx->fh);
 388         kfree(ctx);
 389         return ret;
 390 }
 391
 392 static int hantro_release(struct file *filp)
 393 {
 394         struct hantro_ctx *ctx =
 395                 container_of(filp->private_data, struct hantro_ctx, fh);
 396
 397         /*
 398          * No need for extra locking because this was the last reference
 399          * to this file.
 400          */
 401         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
 402         v4l2_fh_del(&ctx->fh);
 403         v4l2_fh_exit(&ctx->fh);
 404         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 405         kfree(ctx);
 406
 407         return 0;
 408 }
 409
 410 static const struct v4l2_file_operations hantro_fops = {
 411         .owner = THIS_MODULE,
 412         .open = hantro_open,
 413         .release = hantro_release,
 414         .poll = v4l2_m2m_fop_poll,
 415         .unlocked_ioctl = video_ioctl2,
 416         .mmap = v4l2_m2m_fop_mmap,
 417 };
 418
 419 static const struct of_device_id of_hantro_match[] = {
 420 #ifdef CONFIG_VIDEO_HANTRO_ROCKCHIP
 421         { .compatible = "rockchip,rk3399-vpu", .data = &rk3399_vpu_variant, },
 422         { .compatible = "rockchip,rk3288-vpu", .data = &rk3288_vpu_variant, },
 423 #endif
 424         { /* sentinel */ }
 425 };
 426 MODULE_DEVICE_TABLE(of, of_hantro_match);
 427
 428 static int hantro_register_entity(struct media_device *mdev,
 429                                   struct media_entity *entity,
 430                                   const char *entity_name,
 431                                   struct media_pad *pads, int num_pads,
 432                                   int function, struct video_device *vdev)
 433 {
 434         char *name;
 435         int ret;
 436
 437         entity->obj_type = MEDIA_ENTITY_TYPE_BASE;
 438         if (function == MEDIA_ENT_F_IO_V4L) {
 439                 entity->info.dev.major = VIDEO_MAJOR;
 440                 entity->info.dev.minor = vdev->minor;
 441         }
 442
 443         name = devm_kasprintf(mdev->dev, GFP_KERNEL, "%s-%s", vdev->name,
 444                               entity_name);
 445         if (!name)
 446                 return -ENOMEM;
 447
 448         entity->name = name;
 449         entity->function = function;
 450
 451         ret = media_entity_pads_init(entity, num_pads, pads);
 452         if (ret)
 453                 return ret;
 454
 455         ret = media_device_register_entity(mdev, entity);
 456         if (ret)
 457                 return ret;
 458
 459         return 0;
 460 }
 461
 462 static int hantro_attach_func(struct hantro_dev *vpu,
 463                               struct hantro_func *func)
 464 {
 465         struct media_device *mdev = &vpu->mdev;
 466         struct media_link *link;
 467         int ret;
 468
 469         /* Create the three encoder entities with their pads */
 470         func->source_pad.flags = MEDIA_PAD_FL_SOURCE;
 471         ret = hantro_register_entity(mdev, &func->vdev.entity, "source",
 472                                      &func->source_pad, 1, MEDIA_ENT_F_IO_V4L,
 473                                      &func->vdev);
 474         if (ret)
 475                 return ret;
 476
 477         func->proc_pads[0].flags = MEDIA_PAD_FL_SINK;
 478         func->proc_pads[1].flags = MEDIA_PAD_FL_SOURCE;
 479         ret = hantro_register_entity(mdev, &func->proc, "proc",
 480                                      func->proc_pads, 2, func->id,
 481                                      &func->vdev);
 482         if (ret)
 483                 goto err_rel_entity0;
 484
 485         func->sink_pad.flags = MEDIA_PAD_FL_SINK;
 486         ret = hantro_register_entity(mdev, &func->sink, "sink",
 487                                      &func->sink_pad, 1, MEDIA_ENT_F_IO_V4L,
 488                                      &func->vdev);
 489         if (ret)
 490                 goto err_rel_entity1;
 491
 492         /* Connect the three entities */
 493         ret = media_create_pad_link(&func->vdev.entity, 0, &func->proc, 1,
 494                                     MEDIA_LNK_FL_IMMUTABLE |
 495                                     MEDIA_LNK_FL_ENABLED);
 496         if (ret)
 497                 goto err_rel_entity2;
 498
 499         ret = media_create_pad_link(&func->proc, 0, &func->sink, 0,
 500                                     MEDIA_LNK_FL_IMMUTABLE |
 501                                     MEDIA_LNK_FL_ENABLED);
 502         if (ret)
 503                 goto err_rm_links0;
 504
 505         /* Create video interface */
 506         func->intf_devnode = media_devnode_create(mdev, MEDIA_INTF_T_V4L_VIDEO,
 507                                                   0, VIDEO_MAJOR,
 508                                                   func->vdev.minor);
 509         if (!func->intf_devnode) {
 510                 ret = -ENOMEM;
 511                 goto err_rm_links1;
 512         }
 513
 514         /* Connect the two DMA engines to the interface */
 515         link = media_create_intf_link(&func->vdev.entity,
 516                                       &func->intf_devnode->intf,
 517                                       MEDIA_LNK_FL_IMMUTABLE |
 518                                       MEDIA_LNK_FL_ENABLED);
 519         if (!link) {
 520                 ret = -ENOMEM;
 521                 goto err_rm_devnode;
 522         }
 523
 524         link = media_create_intf_link(&func->sink, &func->intf_devnode->intf,
 525                                       MEDIA_LNK_FL_IMMUTABLE |
 526                                       MEDIA_LNK_FL_ENABLED);
 527         if (!link) {
 528                 ret = -ENOMEM;
 529                 goto err_rm_devnode;
 530         }
 531         return 0;
 532
 533 err_rm_devnode:
 534         media_devnode_remove(func->intf_devnode);
 535
 536 err_rm_links1:
 537         media_entity_remove_links(&func->sink);
 538
 539 err_rm_links0:
 540         media_entity_remove_links(&func->proc);
 541         media_entity_remove_links(&func->vdev.entity);
 542
 543 err_rel_entity2:
 544         media_device_unregister_entity(&func->sink);
 545
 546 err_rel_entity1:
 547         media_device_unregister_entity(&func->proc);
 548
 549 err_rel_entity0:
 550         media_device_unregister_entity(&func->vdev.entity);
 551         return ret;
 552 }
 553
 554 static void hantro_detach_func(struct hantro_func *func)
 555 {
 556         media_devnode_remove(func->intf_devnode);
 557         media_entity_remove_links(&func->sink);
 558         media_entity_remove_links(&func->proc);
 559         media_entity_remove_links(&func->vdev.entity);
 560         media_device_unregister_entity(&func->sink);
 561         media_device_unregister_entity(&func->proc);
 562         media_device_unregister_entity(&func->vdev.entity);
 563 }
 564
 565 static int hantro_add_func(struct hantro_dev *vpu, unsigned int funcid)
 566 {
 567         const struct of_device_id *match;
 568         struct hantro_func *func;
 569         struct video_device *vfd;
 570         int ret;
 571
 572         match = of_match_node(of_hantro_match, vpu->dev->of_node);
 573         func = devm_kzalloc(vpu->dev, sizeof(*func), GFP_KERNEL);
 574         if (!func) {
 575                 v4l2_err(&vpu->v4l2_dev, "Failed to allocate video device\n");
 576                 return -ENOMEM;
 577         }
 578
 579         func->id = funcid;
 580
 581         vfd = &func->vdev;
 582         vfd->fops = &hantro_fops;
 583         vfd->release = video_device_release_empty;
 584         vfd->lock = &vpu->vpu_mutex;
 585         vfd->v4l2_dev = &vpu->v4l2_dev;
 586         vfd->vfl_dir = VFL_DIR_M2M;
 587         vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
 588         vfd->ioctl_ops = &hantro_ioctl_ops;
 589         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
 590                  funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER ? "enc" : "dec");
 591
 592         if (funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER)
 593                 vpu->encoder = func;
 594         else
 595                 vpu->decoder = func;
 596
 597         video_set_drvdata(vfd, vpu);
 598
 599         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
 600         if (ret) {
 601                 v4l2_err(&vpu->v4l2_dev, "Failed to register video device\n");
 602                 return ret;
 603         }
 604
 605         ret = hantro_attach_func(vpu, func);
 606         if (ret) {
 607                 v4l2_err(&vpu->v4l2_dev,
 608                          "Failed to attach functionality to the media device\n");
 609                 goto err_unreg_dev;
 610         }
 611
 612         v4l2_info(&vpu->v4l2_dev, "registered %s as /dev/video%d\n", vfd->name,
 613                   vfd->num);
 614
 615         return 0;
 616
 617 err_unreg_dev:
 618         video_unregister_device(vfd);
 619         return ret;
 620 }
 621
 622 static int hantro_add_enc_func(struct hantro_dev *vpu)
 623 {
 624         if (!vpu->variant->enc_fmts)
 625                 return 0;
 626
 627         return hantro_add_func(vpu, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
 628 }
 629
 630 static int hantro_add_dec_func(struct hantro_dev *vpu)
 631 {
 632         if (!vpu->variant->dec_fmts)
 633                 return 0;
 634
 635         return hantro_add_func(vpu, MEDIA_ENT_F_PROC_VIDEO_DECODER);
 636 }
 637
 638 static void hantro_remove_func(struct hantro_dev *vpu,
 639                                unsigned int funcid)
 640 {
 641         struct hantro_func *func;
 642
 643         if (funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER)
 644                 func = vpu->encoder;
 645         else
 646                 func = vpu->decoder;
 647
 648         if (!func)
 649                 return;
 650
 651         hantro_detach_func(func);
 652         video_unregister_device(&func->vdev);
 653 }
 654
 655 static void hantro_remove_enc_func(struct hantro_dev *vpu)
 656 {
 657         hantro_remove_func(vpu, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
 658 }
 659
 660 static void hantro_remove_dec_func(struct hantro_dev *vpu)
 661 {
 662         hantro_remove_func(vpu, MEDIA_ENT_F_PROC_VIDEO_DECODER);
 663 }
 664
 665 static const struct media_device_ops hantro_m2m_media_ops = {
 666         .req_validate = vb2_request_validate,
 667         .req_queue = v4l2_m2m_request_queue,
 668 };
 669
 670 static int hantro_probe(struct platform_device *pdev)
 671 {
 672         const struct of_device_id *match;
 673         struct hantro_dev *vpu;
 674         struct resource *res;
 675         int num_bases;
 676         int i, ret;
 677
 678         vpu = devm_kzalloc(&pdev->dev, sizeof(*vpu), GFP_KERNEL);
 679         if (!vpu)
 680                 return -ENOMEM;
 681
 682         vpu->dev = &pdev->dev;
 683         vpu->pdev = pdev;
 684         mutex_init(&vpu->vpu_mutex);
 685         spin_lock_init(&vpu->irqlock);
 686
 687         match = of_match_node(of_hantro_match, pdev->dev.of_node);
 688         vpu->variant = match->data;
 689
 690         INIT_DELAYED_WORK(&vpu->watchdog_work, hantro_watchdog);
 691
 692         vpu->clocks = devm_kcalloc(&pdev->dev, vpu->variant->num_clocks,
 693                                    sizeof(*vpu->clocks), GFP_KERNEL);
 694         if (!vpu->clocks)
 695                 return -ENOMEM;
 696
 697         for (i = 0; i < vpu->variant->num_clocks; i++)
 698                 vpu->clocks[i].id = vpu->variant->clk_names[i];
 699         ret = devm_clk_bulk_get(&pdev->dev, vpu->variant->num_clocks,
 700                                 vpu->clocks);
 701         if (ret)
 702                 return ret;
 703
 704         num_bases = vpu->variant->num_regs ?: 1;
 705         vpu->reg_bases = devm_kcalloc(&pdev->dev, num_bases,
 706                                       sizeof(*vpu->reg_bases), GFP_KERNEL);
 707         if (!vpu->reg_bases)
 708                 return -ENOMEM;
 709
 710         for (i = 0; i < num_bases; i++) {
 711                 res = vpu->variant->reg_names ?
 712                       platform_get_resource_byname(vpu->pdev, IORESOURCE_MEM,
 713                                                    vpu->variant->reg_names[i]) :
 714                       platform_get_resource(vpu->pdev, IORESOURCE_MEM, 0);
 715                 vpu->reg_bases[i] = devm_ioremap_resource(vpu->dev, res);
 716                 if (IS_ERR(vpu->reg_bases[i]))
 717                         return PTR_ERR(vpu->reg_bases[i]);
 718         }
 719         vpu->enc_base = vpu->reg_bases[0] + vpu->variant->enc_offset;
 720         vpu->dec_base = vpu->reg_bases[0] + vpu->variant->dec_offset;
 721
 722         ret = dma_set_coherent_mask(vpu->dev, DMA_BIT_MASK(32));
 723         if (ret) {
 724                 dev_err(vpu->dev, "Could not set DMA coherent mask.\n");
 725                 return ret;
 726         }
 727
 728         for (i = 0; i < vpu->variant->num_irqs; i++) {
 729                 const char *irq_name = vpu->variant->irqs[i].name;
 730                 int irq;
 731
 732                 if (!vpu->variant->irqs[i].handler)
 733                         continue;
 734
 735                 irq = platform_get_irq_byname(vpu->pdev, irq_name);
 736                 if (irq <= 0) {
 737                         dev_err(vpu->dev, "Could not get %s IRQ.\n", irq_name);
 738                         return -ENXIO;
 739                 }
 740
 741                 ret = devm_request_irq(vpu->dev, irq,
 742                                        vpu->variant->irqs[i].handler, 0,
 743                                        dev_name(vpu->dev), vpu);
 744                 if (ret) {
 745                         dev_err(vpu->dev, "Could not request %s IRQ.\n",
 746                                 irq_name);
 747                         return ret;
 748                 }
 749         }
 750
 751         ret = vpu->variant->init(vpu);
 752         if (ret) {
 753                 dev_err(&pdev->dev, "Failed to init VPU hardware\n");
 754                 return ret;
 755         }
 756
 757         pm_runtime_set_autosuspend_delay(vpu->dev, 100);
 758         pm_runtime_use_autosuspend(vpu->dev);
 759         pm_runtime_enable(vpu->dev);
 760
 761         ret = clk_bulk_prepare(vpu->variant->num_clocks, vpu->clocks);
 762         if (ret) {
 763                 dev_err(&pdev->dev, "Failed to prepare clocks\n");
 764                 return ret;
 765         }
 766
 767         ret = v4l2_device_register(&pdev->dev, &vpu->v4l2_dev);
 768         if (ret) {
 769                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 770                 goto err_clk_unprepare;
 771         }
 772         platform_set_drvdata(pdev, vpu);
 773
 774         vpu->m2m_dev = v4l2_m2m_init(&vpu_m2m_ops);
 775         if (IS_ERR(vpu->m2m_dev)) {
 776                 v4l2_err(&vpu->v4l2_dev, "Failed to init mem2mem device\n");
 777                 ret = PTR_ERR(vpu->m2m_dev);
 778                 goto err_v4l2_unreg;
 779         }
 780
 781         vpu->mdev.dev = vpu->dev;
 782         strscpy(vpu->mdev.model, DRIVER_NAME, sizeof(vpu->mdev.model));
 783         strscpy(vpu->mdev.bus_info, "platform: " DRIVER_NAME,
 784                 sizeof(vpu->mdev.model));
 785         media_device_init(&vpu->mdev);
 786         vpu->mdev.ops = &hantro_m2m_media_ops;
 787         vpu->v4l2_dev.mdev = &vpu->mdev;
 788
 789         ret = hantro_add_enc_func(vpu);
 790         if (ret) {
 791                 dev_err(&pdev->dev, "Failed to register encoder\n");
 792                 goto err_m2m_rel;
 793         }
 794
 795         ret = hantro_add_dec_func(vpu);
 796         if (ret) {
 797                 dev_err(&pdev->dev, "Failed to register decoder\n");
 798                 goto err_rm_enc_func;
 799         }
 800
 801         ret = media_device_register(&vpu->mdev);
 802         if (ret) {
 803                 v4l2_err(&vpu->v4l2_dev, "Failed to register mem2mem media device\n");
 804                 goto err_rm_dec_func;
 805         }
 806
 807         return 0;
 808
 809 err_rm_dec_func:
 810         hantro_remove_dec_func(vpu);
 811 err_rm_enc_func:
 812         hantro_remove_enc_func(vpu);
 813 err_m2m_rel:
 814         media_device_cleanup(&vpu->mdev);
 815         v4l2_m2m_release(vpu->m2m_dev);
 816 err_v4l2_unreg:
 817         v4l2_device_unregister(&vpu->v4l2_dev);
 818 err_clk_unprepare:
 819         clk_bulk_unprepare(vpu->variant->num_clocks, vpu->clocks);
 820         pm_runtime_dont_use_autosuspend(vpu->dev);
 821         pm_runtime_disable(vpu->dev);
 822         return ret;
 823 }
 824
 825 static int hantro_remove(struct platform_device *pdev)
 826 {
 827         struct hantro_dev *vpu = platform_get_drvdata(pdev);
 828
 829         v4l2_info(&vpu->v4l2_dev, "Removing %s\n", pdev->name);
 830
 831         media_device_unregister(&vpu->mdev);
 832         hantro_remove_dec_func(vpu);
 833         hantro_remove_enc_func(vpu);
 834         media_device_cleanup(&vpu->mdev);
 835         v4l2_m2m_release(vpu->m2m_dev);
 836         v4l2_device_unregister(&vpu->v4l2_dev);
 837         clk_bulk_unprepare(vpu->variant->num_clocks, vpu->clocks);
 838         pm_runtime_dont_use_autosuspend(vpu->dev);
 839         pm_runtime_disable(vpu->dev);
 840         return 0;
 841 }
 842
 843 #ifdef CONFIG_PM
 844 static int hantro_runtime_resume(struct device *dev)
 845 {
 846         struct hantro_dev *vpu = dev_get_drvdata(dev);
 847
 848         if (vpu->variant->runtime_resume)
 849                 return vpu->variant->runtime_resume(vpu);
 850
 851         return 0;
 852 }
 853 #endif
 854
 855 static const struct dev_pm_ops hantro_pm_ops = {
 856         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 857                                 pm_runtime_force_resume)
 858         SET_RUNTIME_PM_OPS(NULL, hantro_runtime_resume, NULL)
 859 };
 860
 861 static struct platform_driver hantro_driver = {
 862         .probe = hantro_probe,
 863         .remove = hantro_remove,
 864         .driver = {
 865                    .name = DRIVER_NAME,
 866                    .of_match_table = of_match_ptr(of_hantro_match),
 867                    .pm = &hantro_pm_ops,
 868         },
 869 };
 870 module_platform_driver(hantro_driver);
 871
 872 MODULE_LICENSE("GPL v2");
 873 MODULE_AUTHOR("Alpha Lin <Alpha.Lin@Rock-Chips.com>");
 874 MODULE_AUTHOR("Tomasz Figa <tfiga@chromium.org>");
 875 MODULE_AUTHOR("Ezequiel Garcia <ezequiel@collabora.com>");
 876 MODULE_DESCRIPTION("Hantro VPU codec driver");