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 hantro_ctx *ctx, u64 ts)
  47 {
  48         struct vb2_queue *q = v4l2_m2m_get_dst_vq(ctx->fh.m2m_ctx);
  49         struct vb2_buffer *buf;
  50         int index;
  51
  52         index = vb2_find_timestamp(q, ts, 0);
  53         if (index < 0)
  54                 return 0;
  55         buf = vb2_get_buffer(q, index);
  56         return hantro_get_dec_buf_addr(ctx, buf);
  57 }
  58
  59 static int
  60 hantro_enc_buf_finish(struct hantro_ctx *ctx, struct vb2_buffer *buf,
  61                       unsigned int bytesused)
  62 {
  63         size_t avail_size;
  64
  65         avail_size = vb2_plane_size(buf, 0) - ctx->vpu_dst_fmt->header_size;
  66         if (bytesused > avail_size)
  67                 return -EINVAL;
  68         /*
  69          * The bounce buffer is only for the JPEG encoder.
  70          * TODO: Rework the JPEG encoder to eliminate the need
  71          * for a bounce buffer.
  72          */
  73         if (ctx->jpeg_enc.bounce_buffer.cpu) {
  74                 memcpy(vb2_plane_vaddr(buf, 0) +
  75                        ctx->vpu_dst_fmt->header_size,
  76                        ctx->jpeg_enc.bounce_buffer.cpu, bytesused);
  77         }
  78         buf->planes[0].bytesused =
  79                 ctx->vpu_dst_fmt->header_size + bytesused;
  80         return 0;
  81 }
  82
  83 static int
  84 hantro_dec_buf_finish(struct hantro_ctx *ctx, struct vb2_buffer *buf,
  85                       unsigned int bytesused)
  86 {
  87         /* For decoders set bytesused as per the output picture. */
  88         buf->planes[0].bytesused = ctx->dst_fmt.plane_fmt[0].sizeimage;
  89         return 0;
  90 }
  91
  92 static void hantro_job_finish(struct hantro_dev *vpu,
  93                               struct hantro_ctx *ctx,
  94                               unsigned int bytesused,
  95                               enum vb2_buffer_state result)
  96 {
  97         struct vb2_v4l2_buffer *src, *dst;
  98         int ret;
  99
 100         pm_runtime_mark_last_busy(vpu->dev);
 101         pm_runtime_put_autosuspend(vpu->dev);
 102         clk_bulk_disable(vpu->variant->num_clocks, vpu->clocks);
 103
 104         src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 105         dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 106
 107         if (WARN_ON(!src))
 108                 return;
 109         if (WARN_ON(!dst))
 110                 return;
 111
 112         src->sequence = ctx->sequence_out++;
 113         dst->sequence = ctx->sequence_cap++;
 114
 115         ret = ctx->buf_finish(ctx, &dst->vb2_buf, bytesused);
 116         if (ret)
 117                 result = VB2_BUF_STATE_ERROR;
 118
 119         v4l2_m2m_buf_done(src, result);
 120         v4l2_m2m_buf_done(dst, result);
 121
 122         v4l2_m2m_job_finish(vpu->m2m_dev, ctx->fh.m2m_ctx);
 123 }
 124
 125 void hantro_irq_done(struct hantro_dev *vpu, unsigned int bytesused,
 126                      enum vb2_buffer_state result)
 127 {
 128         struct hantro_ctx *ctx =
 129                 v4l2_m2m_get_curr_priv(vpu->m2m_dev);
 130
 131         /*
 132          * If cancel_delayed_work returns false
 133          * the timeout expired. The watchdog is running,
 134          * and will take care of finishing the job.
 135          */
 136         if (cancel_delayed_work(&vpu->watchdog_work))
 137                 hantro_job_finish(vpu, ctx, bytesused, result);
 138 }
 139
 140 void hantro_watchdog(struct work_struct *work)
 141 {
 142         struct hantro_dev *vpu;
 143         struct hantro_ctx *ctx;
 144
 145         vpu = container_of(to_delayed_work(work),
 146                            struct hantro_dev, watchdog_work);
 147         ctx = v4l2_m2m_get_curr_priv(vpu->m2m_dev);
 148         if (ctx) {
 149                 vpu_err("frame processing timed out!\n");
 150                 ctx->codec_ops->reset(ctx);
 151                 hantro_job_finish(vpu, ctx, 0, VB2_BUF_STATE_ERROR);
 152         }
 153 }
 154
 155 void hantro_start_prepare_run(struct hantro_ctx *ctx)
 156 {
 157         struct vb2_v4l2_buffer *src_buf;
 158
 159         src_buf = hantro_get_src_buf(ctx);
 160         v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req,
 161                                 &ctx->ctrl_handler);
 162
 163         if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
 164                 hantro_postproc_enable(ctx);
 165         else
 166                 hantro_postproc_disable(ctx);
 167 }
 168
 169 void hantro_end_prepare_run(struct hantro_ctx *ctx)
 170 {
 171         struct vb2_v4l2_buffer *src_buf;
 172
 173         src_buf = hantro_get_src_buf(ctx);
 174         v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
 175                                    &ctx->ctrl_handler);
 176
 177         /* Kick the watchdog. */
 178         schedule_delayed_work(&ctx->dev->watchdog_work,
 179                               msecs_to_jiffies(2000));
 180 }
 181
 182 static void device_run(void *priv)
 183 {
 184         struct hantro_ctx *ctx = priv;
 185         struct vb2_v4l2_buffer *src, *dst;
 186         int ret;
 187
 188         src = hantro_get_src_buf(ctx);
 189         dst = hantro_get_dst_buf(ctx);
 190
 191         ret = clk_bulk_enable(ctx->dev->variant->num_clocks, ctx->dev->clocks);
 192         if (ret)
 193                 goto err_cancel_job;
 194         ret = pm_runtime_get_sync(ctx->dev->dev);
 195         if (ret < 0)
 196                 goto err_cancel_job;
 197
 198         v4l2_m2m_buf_copy_metadata(src, dst, true);
 199
 200         ctx->codec_ops->run(ctx);
 201         return;
 202
 203 err_cancel_job:
 204         hantro_job_finish(ctx->dev, ctx, 0, VB2_BUF_STATE_ERROR);
 205 }
 206
 207 bool hantro_is_encoder_ctx(const struct hantro_ctx *ctx)
 208 {
 209         return ctx->buf_finish == hantro_enc_buf_finish;
 210 }
 211
 212 static struct v4l2_m2m_ops vpu_m2m_ops = {
 213         .device_run = device_run,
 214 };
 215
 216 static int
 217 queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
 218 {
 219         struct hantro_ctx *ctx = priv;
 220         int ret;
 221
 222         src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 223         src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 224         src_vq->drv_priv = ctx;
 225         src_vq->ops = &hantro_queue_ops;
 226         src_vq->mem_ops = &vb2_dma_contig_memops;
 227
 228         /*
 229          * Driver does mostly sequential access, so sacrifice TLB efficiency
 230          * for faster allocation. Also, no CPU access on the source queue,
 231          * so no kernel mapping needed.
 232          */
 233         src_vq->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES |
 234                             DMA_ATTR_NO_KERNEL_MAPPING;
 235         src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 236         src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 237         src_vq->lock = &ctx->dev->vpu_mutex;
 238         src_vq->dev = ctx->dev->v4l2_dev.dev;
 239         src_vq->supports_requests = true;
 240
 241         ret = vb2_queue_init(src_vq);
 242         if (ret)
 243                 return ret;
 244
 245         /*
 246          * When encoding, the CAPTURE queue doesn't need dma memory,
 247          * as the CPU needs to create the JPEG frames, from the
 248          * hardware-produced JPEG payload.
 249          *
 250          * For the DMA destination buffer, we use a bounce buffer.
 251          */
 252         if (hantro_is_encoder_ctx(ctx)) {
 253                 dst_vq->mem_ops = &vb2_vmalloc_memops;
 254         } else {
 255                 dst_vq->bidirectional = true;
 256                 dst_vq->mem_ops = &vb2_dma_contig_memops;
 257                 dst_vq->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES |
 258                                     DMA_ATTR_NO_KERNEL_MAPPING;
 259         }
 260
 261         dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 262         dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 263         dst_vq->drv_priv = ctx;
 264         dst_vq->ops = &hantro_queue_ops;
 265         dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 266         dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 267         dst_vq->lock = &ctx->dev->vpu_mutex;
 268         dst_vq->dev = ctx->dev->v4l2_dev.dev;
 269
 270         return vb2_queue_init(dst_vq);
 271 }
 272
 273 static int hantro_s_ctrl(struct v4l2_ctrl *ctrl)
 274 {
 275         struct hantro_ctx *ctx;
 276
 277         ctx = container_of(ctrl->handler,
 278                            struct hantro_ctx, ctrl_handler);
 279
 280         vpu_debug(1, "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);
 281
 282         switch (ctrl->id) {
 283         case V4L2_CID_JPEG_COMPRESSION_QUALITY:
 284                 ctx->jpeg_quality = ctrl->val;
 285                 break;
 286         default:
 287                 return -EINVAL;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static const struct v4l2_ctrl_ops hantro_ctrl_ops = {
 294         .s_ctrl = hantro_s_ctrl,
 295 };
 296
 297 static const struct hantro_ctrl controls[] = {
 298         {
 299                 .codec = HANTRO_JPEG_ENCODER,
 300                 .cfg = {
 301                         .id = V4L2_CID_JPEG_COMPRESSION_QUALITY,
 302                         .min = 5,
 303                         .max = 100,
 304                         .step = 1,
 305                         .def = 50,
 306                         .ops = &hantro_ctrl_ops,
 307                 },
 308         }, {
 309                 .codec = HANTRO_MPEG2_DECODER,
 310                 .cfg = {
 311                         .id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
 312                 },
 313         }, {
 314                 .codec = HANTRO_MPEG2_DECODER,
 315                 .cfg = {
 316                         .id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
 317                 },
 318         }, {
 319                 .codec = HANTRO_VP8_DECODER,
 320                 .cfg = {
 321                         .id = V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER,
 322                 },
 323         }, {
 324                 .codec = HANTRO_H264_DECODER,
 325                 .cfg = {
 326                         .id = V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
 327                 },
 328         }, {
 329                 .codec = HANTRO_H264_DECODER,
 330                 .cfg = {
 331                         .id = V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
 332                 },
 333         }, {
 334                 .codec = HANTRO_H264_DECODER,
 335                 .cfg = {
 336                         .id = V4L2_CID_MPEG_VIDEO_H264_SPS,
 337                 },
 338         }, {
 339                 .codec = HANTRO_H264_DECODER,
 340                 .cfg = {
 341                         .id = V4L2_CID_MPEG_VIDEO_H264_PPS,
 342                 },
 343         }, {
 344                 .codec = HANTRO_H264_DECODER,
 345                 .cfg = {
 346                         .id = V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
 347                 },
 348         }, {
 349                 .codec = HANTRO_H264_DECODER,
 350                 .cfg = {
 351                         .id = V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE,
 352                         .min = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
 353                         .def = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
 354                         .max = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
 355                 },
 356         }, {
 357                 .codec = HANTRO_H264_DECODER,
 358                 .cfg = {
 359                         .id = V4L2_CID_MPEG_VIDEO_H264_START_CODE,
 360                         .min = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
 361                         .def = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
 362                         .max = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
 363                 },
 364         }, {
 365         },
 366 };
 367
 368 static int hantro_ctrls_setup(struct hantro_dev *vpu,
 369                               struct hantro_ctx *ctx,
 370                               int allowed_codecs)
 371 {
 372         int i, num_ctrls = ARRAY_SIZE(controls);
 373
 374         v4l2_ctrl_handler_init(&ctx->ctrl_handler, num_ctrls);
 375
 376         for (i = 0; i < num_ctrls; i++) {
 377                 if (!(allowed_codecs & controls[i].codec))
 378                         continue;
 379
 380                 v4l2_ctrl_new_custom(&ctx->ctrl_handler,
 381                                      &controls[i].cfg, NULL);
 382                 if (ctx->ctrl_handler.error) {
 383                         vpu_err("Adding control (%d) failed %d\n",
 384                                 controls[i].cfg.id,
 385                                 ctx->ctrl_handler.error);
 386                         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 387                         return ctx->ctrl_handler.error;
 388                 }
 389         }
 390         return v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 391 }
 392
 393 /*
 394  * V4L2 file operations.
 395  */
 396
 397 static int hantro_open(struct file *filp)
 398 {
 399         struct hantro_dev *vpu = video_drvdata(filp);
 400         struct video_device *vdev = video_devdata(filp);
 401         struct hantro_func *func = hantro_vdev_to_func(vdev);
 402         struct hantro_ctx *ctx;
 403         int allowed_codecs, ret;
 404
 405         /*
 406          * We do not need any extra locking here, because we operate only
 407          * on local data here, except reading few fields from dev, which
 408          * do not change through device's lifetime (which is guaranteed by
 409          * reference on module from open()) and V4L2 internal objects (such
 410          * as vdev and ctx->fh), which have proper locking done in respective
 411          * helper functions used here.
 412          */
 413
 414         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 415         if (!ctx)
 416                 return -ENOMEM;
 417
 418         ctx->dev = vpu;
 419         if (func->id == MEDIA_ENT_F_PROC_VIDEO_ENCODER) {
 420                 allowed_codecs = vpu->variant->codec & HANTRO_ENCODERS;
 421                 ctx->buf_finish = hantro_enc_buf_finish;
 422         } else if (func->id == MEDIA_ENT_F_PROC_VIDEO_DECODER) {
 423                 allowed_codecs = vpu->variant->codec & HANTRO_DECODERS;
 424                 ctx->buf_finish = hantro_dec_buf_finish;
 425         } else {
 426                 ret = -ENODEV;
 427                 goto err_ctx_free;
 428         }
 429
 430         ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(vpu->m2m_dev, ctx, queue_init);
 431         if (IS_ERR(ctx->fh.m2m_ctx)) {
 432                 ret = PTR_ERR(ctx->fh.m2m_ctx);
 433                 goto err_ctx_free;
 434         }
 435
 436         v4l2_fh_init(&ctx->fh, vdev);
 437         filp->private_data = &ctx->fh;
 438         v4l2_fh_add(&ctx->fh);
 439
 440         hantro_reset_fmts(ctx);
 441
 442         ret = hantro_ctrls_setup(vpu, ctx, allowed_codecs);
 443         if (ret) {
 444                 vpu_err("Failed to set up controls\n");
 445                 goto err_fh_free;
 446         }
 447         ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 448
 449         return 0;
 450
 451 err_fh_free:
 452         v4l2_fh_del(&ctx->fh);
 453         v4l2_fh_exit(&ctx->fh);
 454 err_ctx_free:
 455         kfree(ctx);
 456         return ret;
 457 }
 458
 459 static int hantro_release(struct file *filp)
 460 {
 461         struct hantro_ctx *ctx =
 462                 container_of(filp->private_data, struct hantro_ctx, fh);
 463
 464         /*
 465          * No need for extra locking because this was the last reference
 466          * to this file.
 467          */
 468         v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
 469         v4l2_fh_del(&ctx->fh);
 470         v4l2_fh_exit(&ctx->fh);
 471         v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 472         kfree(ctx);
 473
 474         return 0;
 475 }
 476
 477 static const struct v4l2_file_operations hantro_fops = {
 478         .owner = THIS_MODULE,
 479         .open = hantro_open,
 480         .release = hantro_release,
 481         .poll = v4l2_m2m_fop_poll,
 482         .unlocked_ioctl = video_ioctl2,
 483         .mmap = v4l2_m2m_fop_mmap,
 484 };
 485
 486 static const struct of_device_id of_hantro_match[] = {
 487 #ifdef CONFIG_VIDEO_HANTRO_ROCKCHIP
 488         { .compatible = "rockchip,rk3399-vpu", .data = &rk3399_vpu_variant, },
 489         { .compatible = "rockchip,rk3328-vpu", .data = &rk3328_vpu_variant, },
 490         { .compatible = "rockchip,rk3288-vpu", .data = &rk3288_vpu_variant, },
 491 #endif
 492         { /* sentinel */ }
 493 };
 494 MODULE_DEVICE_TABLE(of, of_hantro_match);
 495
 496 static int hantro_register_entity(struct media_device *mdev,
 497                                   struct media_entity *entity,
 498                                   const char *entity_name,
 499                                   struct media_pad *pads, int num_pads,
 500                                   int function, struct video_device *vdev)
 501 {
 502         char *name;
 503         int ret;
 504
 505         entity->obj_type = MEDIA_ENTITY_TYPE_BASE;
 506         if (function == MEDIA_ENT_F_IO_V4L) {
 507                 entity->info.dev.major = VIDEO_MAJOR;
 508                 entity->info.dev.minor = vdev->minor;
 509         }
 510
 511         name = devm_kasprintf(mdev->dev, GFP_KERNEL, "%s-%s", vdev->name,
 512                               entity_name);
 513         if (!name)
 514                 return -ENOMEM;
 515
 516         entity->name = name;
 517         entity->function = function;
 518
 519         ret = media_entity_pads_init(entity, num_pads, pads);
 520         if (ret)
 521                 return ret;
 522
 523         ret = media_device_register_entity(mdev, entity);
 524         if (ret)
 525                 return ret;
 526
 527         return 0;
 528 }
 529
 530 static int hantro_attach_func(struct hantro_dev *vpu,
 531                               struct hantro_func *func)
 532 {
 533         struct media_device *mdev = &vpu->mdev;
 534         struct media_link *link;
 535         int ret;
 536
 537         /* Create the three encoder entities with their pads */
 538         func->source_pad.flags = MEDIA_PAD_FL_SOURCE;
 539         ret = hantro_register_entity(mdev, &func->vdev.entity, "source",
 540                                      &func->source_pad, 1, MEDIA_ENT_F_IO_V4L,
 541                                      &func->vdev);
 542         if (ret)
 543                 return ret;
 544
 545         func->proc_pads[0].flags = MEDIA_PAD_FL_SINK;
 546         func->proc_pads[1].flags = MEDIA_PAD_FL_SOURCE;
 547         ret = hantro_register_entity(mdev, &func->proc, "proc",
 548                                      func->proc_pads, 2, func->id,
 549                                      &func->vdev);
 550         if (ret)
 551                 goto err_rel_entity0;
 552
 553         func->sink_pad.flags = MEDIA_PAD_FL_SINK;
 554         ret = hantro_register_entity(mdev, &func->sink, "sink",
 555                                      &func->sink_pad, 1, MEDIA_ENT_F_IO_V4L,
 556                                      &func->vdev);
 557         if (ret)
 558                 goto err_rel_entity1;
 559
 560         /* Connect the three entities */
 561         ret = media_create_pad_link(&func->vdev.entity, 0, &func->proc, 1,
 562                                     MEDIA_LNK_FL_IMMUTABLE |
 563                                     MEDIA_LNK_FL_ENABLED);
 564         if (ret)
 565                 goto err_rel_entity2;
 566
 567         ret = media_create_pad_link(&func->proc, 0, &func->sink, 0,
 568                                     MEDIA_LNK_FL_IMMUTABLE |
 569                                     MEDIA_LNK_FL_ENABLED);
 570         if (ret)
 571                 goto err_rm_links0;
 572
 573         /* Create video interface */
 574         func->intf_devnode = media_devnode_create(mdev, MEDIA_INTF_T_V4L_VIDEO,
 575                                                   0, VIDEO_MAJOR,
 576                                                   func->vdev.minor);
 577         if (!func->intf_devnode) {
 578                 ret = -ENOMEM;
 579                 goto err_rm_links1;
 580         }
 581
 582         /* Connect the two DMA engines to the interface */
 583         link = media_create_intf_link(&func->vdev.entity,
 584                                       &func->intf_devnode->intf,
 585                                       MEDIA_LNK_FL_IMMUTABLE |
 586                                       MEDIA_LNK_FL_ENABLED);
 587         if (!link) {
 588                 ret = -ENOMEM;
 589                 goto err_rm_devnode;
 590         }
 591
 592         link = media_create_intf_link(&func->sink, &func->intf_devnode->intf,
 593                                       MEDIA_LNK_FL_IMMUTABLE |
 594                                       MEDIA_LNK_FL_ENABLED);
 595         if (!link) {
 596                 ret = -ENOMEM;
 597                 goto err_rm_devnode;
 598         }
 599         return 0;
 600
 601 err_rm_devnode:
 602         media_devnode_remove(func->intf_devnode);
 603
 604 err_rm_links1:
 605         media_entity_remove_links(&func->sink);
 606
 607 err_rm_links0:
 608         media_entity_remove_links(&func->proc);
 609         media_entity_remove_links(&func->vdev.entity);
 610
 611 err_rel_entity2:
 612         media_device_unregister_entity(&func->sink);
 613
 614 err_rel_entity1:
 615         media_device_unregister_entity(&func->proc);
 616
 617 err_rel_entity0:
 618         media_device_unregister_entity(&func->vdev.entity);
 619         return ret;
 620 }
 621
 622 static void hantro_detach_func(struct hantro_func *func)
 623 {
 624         media_devnode_remove(func->intf_devnode);
 625         media_entity_remove_links(&func->sink);
 626         media_entity_remove_links(&func->proc);
 627         media_entity_remove_links(&func->vdev.entity);
 628         media_device_unregister_entity(&func->sink);
 629         media_device_unregister_entity(&func->proc);
 630         media_device_unregister_entity(&func->vdev.entity);
 631 }
 632
 633 static int hantro_add_func(struct hantro_dev *vpu, unsigned int funcid)
 634 {
 635         const struct of_device_id *match;
 636         struct hantro_func *func;
 637         struct video_device *vfd;
 638         int ret;
 639
 640         match = of_match_node(of_hantro_match, vpu->dev->of_node);
 641         func = devm_kzalloc(vpu->dev, sizeof(*func), GFP_KERNEL);
 642         if (!func) {
 643                 v4l2_err(&vpu->v4l2_dev, "Failed to allocate video device\n");
 644                 return -ENOMEM;
 645         }
 646
 647         func->id = funcid;
 648
 649         vfd = &func->vdev;
 650         vfd->fops = &hantro_fops;
 651         vfd->release = video_device_release_empty;
 652         vfd->lock = &vpu->vpu_mutex;
 653         vfd->v4l2_dev = &vpu->v4l2_dev;
 654         vfd->vfl_dir = VFL_DIR_M2M;
 655         vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
 656         vfd->ioctl_ops = &hantro_ioctl_ops;
 657         snprintf(vfd->name, sizeof(vfd->name), "%s-%s", match->compatible,
 658                  funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER ? "enc" : "dec");
 659
 660         if (funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER)
 661                 vpu->encoder = func;
 662         else
 663                 vpu->decoder = func;
 664
 665         video_set_drvdata(vfd, vpu);
 666
 667         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
 668         if (ret) {
 669                 v4l2_err(&vpu->v4l2_dev, "Failed to register video device\n");
 670                 return ret;
 671         }
 672
 673         ret = hantro_attach_func(vpu, func);
 674         if (ret) {
 675                 v4l2_err(&vpu->v4l2_dev,
 676                          "Failed to attach functionality to the media device\n");
 677                 goto err_unreg_dev;
 678         }
 679
 680         v4l2_info(&vpu->v4l2_dev, "registered %s as /dev/video%d\n", vfd->name,
 681                   vfd->num);
 682
 683         return 0;
 684
 685 err_unreg_dev:
 686         video_unregister_device(vfd);
 687         return ret;
 688 }
 689
 690 static int hantro_add_enc_func(struct hantro_dev *vpu)
 691 {
 692         if (!vpu->variant->enc_fmts)
 693                 return 0;
 694
 695         return hantro_add_func(vpu, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
 696 }
 697
 698 static int hantro_add_dec_func(struct hantro_dev *vpu)
 699 {
 700         if (!vpu->variant->dec_fmts)
 701                 return 0;
 702
 703         return hantro_add_func(vpu, MEDIA_ENT_F_PROC_VIDEO_DECODER);
 704 }
 705
 706 static void hantro_remove_func(struct hantro_dev *vpu,
 707                                unsigned int funcid)
 708 {
 709         struct hantro_func *func;
 710
 711         if (funcid == MEDIA_ENT_F_PROC_VIDEO_ENCODER)
 712                 func = vpu->encoder;
 713         else
 714                 func = vpu->decoder;
 715
 716         if (!func)
 717                 return;
 718
 719         hantro_detach_func(func);
 720         video_unregister_device(&func->vdev);
 721 }
 722
 723 static void hantro_remove_enc_func(struct hantro_dev *vpu)
 724 {
 725         hantro_remove_func(vpu, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
 726 }
 727
 728 static void hantro_remove_dec_func(struct hantro_dev *vpu)
 729 {
 730         hantro_remove_func(vpu, MEDIA_ENT_F_PROC_VIDEO_DECODER);
 731 }
 732
 733 static const struct media_device_ops hantro_m2m_media_ops = {
 734         .req_validate = vb2_request_validate,
 735         .req_queue = v4l2_m2m_request_queue,
 736 };
 737
 738 static int hantro_probe(struct platform_device *pdev)
 739 {
 740         const struct of_device_id *match;
 741         struct hantro_dev *vpu;
 742         struct resource *res;
 743         int num_bases;
 744         int i, ret;
 745
 746         vpu = devm_kzalloc(&pdev->dev, sizeof(*vpu), GFP_KERNEL);
 747         if (!vpu)
 748                 return -ENOMEM;
 749
 750         vpu->dev = &pdev->dev;
 751         vpu->pdev = pdev;
 752         mutex_init(&vpu->vpu_mutex);
 753         spin_lock_init(&vpu->irqlock);
 754
 755         match = of_match_node(of_hantro_match, pdev->dev.of_node);
 756         vpu->variant = match->data;
 757
 758         INIT_DELAYED_WORK(&vpu->watchdog_work, hantro_watchdog);
 759
 760         vpu->clocks = devm_kcalloc(&pdev->dev, vpu->variant->num_clocks,
 761                                    sizeof(*vpu->clocks), GFP_KERNEL);
 762         if (!vpu->clocks)
 763                 return -ENOMEM;
 764
 765         for (i = 0; i < vpu->variant->num_clocks; i++)
 766                 vpu->clocks[i].id = vpu->variant->clk_names[i];
 767         ret = devm_clk_bulk_get(&pdev->dev, vpu->variant->num_clocks,
 768                                 vpu->clocks);
 769         if (ret)
 770                 return ret;
 771
 772         num_bases = vpu->variant->num_regs ?: 1;
 773         vpu->reg_bases = devm_kcalloc(&pdev->dev, num_bases,
 774                                       sizeof(*vpu->reg_bases), GFP_KERNEL);
 775         if (!vpu->reg_bases)
 776                 return -ENOMEM;
 777
 778         for (i = 0; i < num_bases; i++) {
 779                 res = vpu->variant->reg_names ?
 780                       platform_get_resource_byname(vpu->pdev, IORESOURCE_MEM,
 781                                                    vpu->variant->reg_names[i]) :
 782                       platform_get_resource(vpu->pdev, IORESOURCE_MEM, 0);
 783                 vpu->reg_bases[i] = devm_ioremap_resource(vpu->dev, res);
 784                 if (IS_ERR(vpu->reg_bases[i]))
 785                         return PTR_ERR(vpu->reg_bases[i]);
 786         }
 787         vpu->enc_base = vpu->reg_bases[0] + vpu->variant->enc_offset;
 788         vpu->dec_base = vpu->reg_bases[0] + vpu->variant->dec_offset;
 789
 790         ret = dma_set_coherent_mask(vpu->dev, DMA_BIT_MASK(32));
 791         if (ret) {
 792                 dev_err(vpu->dev, "Could not set DMA coherent mask.\n");
 793                 return ret;
 794         }
 795         vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 796
 797         for (i = 0; i < vpu->variant->num_irqs; i++) {
 798                 const char *irq_name = vpu->variant->irqs[i].name;
 799                 int irq;
 800
 801                 if (!vpu->variant->irqs[i].handler)
 802                         continue;
 803
 804                 irq = platform_get_irq_byname(vpu->pdev, irq_name);
 805                 if (irq <= 0)
 806                         return -ENXIO;
 807
 808                 ret = devm_request_irq(vpu->dev, irq,
 809                                        vpu->variant->irqs[i].handler, 0,
 810                                        dev_name(vpu->dev), vpu);
 811                 if (ret) {
 812                         dev_err(vpu->dev, "Could not request %s IRQ.\n",
 813                                 irq_name);
 814                         return ret;
 815                 }
 816         }
 817
 818         ret = vpu->variant->init(vpu);
 819         if (ret) {
 820                 dev_err(&pdev->dev, "Failed to init VPU hardware\n");
 821                 return ret;
 822         }
 823
 824         pm_runtime_set_autosuspend_delay(vpu->dev, 100);
 825         pm_runtime_use_autosuspend(vpu->dev);
 826         pm_runtime_enable(vpu->dev);
 827
 828         ret = clk_bulk_prepare(vpu->variant->num_clocks, vpu->clocks);
 829         if (ret) {
 830                 dev_err(&pdev->dev, "Failed to prepare clocks\n");
 831                 return ret;
 832         }
 833
 834         ret = v4l2_device_register(&pdev->dev, &vpu->v4l2_dev);
 835         if (ret) {
 836                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 837                 goto err_clk_unprepare;
 838         }
 839         platform_set_drvdata(pdev, vpu);
 840
 841         vpu->m2m_dev = v4l2_m2m_init(&vpu_m2m_ops);
 842         if (IS_ERR(vpu->m2m_dev)) {
 843                 v4l2_err(&vpu->v4l2_dev, "Failed to init mem2mem device\n");
 844                 ret = PTR_ERR(vpu->m2m_dev);
 845                 goto err_v4l2_unreg;
 846         }
 847
 848         vpu->mdev.dev = vpu->dev;
 849         strscpy(vpu->mdev.model, DRIVER_NAME, sizeof(vpu->mdev.model));
 850         strscpy(vpu->mdev.bus_info, "platform: " DRIVER_NAME,
 851                 sizeof(vpu->mdev.model));
 852         media_device_init(&vpu->mdev);
 853         vpu->mdev.ops = &hantro_m2m_media_ops;
 854         vpu->v4l2_dev.mdev = &vpu->mdev;
 855
 856         ret = hantro_add_enc_func(vpu);
 857         if (ret) {
 858                 dev_err(&pdev->dev, "Failed to register encoder\n");
 859                 goto err_m2m_rel;
 860         }
 861
 862         ret = hantro_add_dec_func(vpu);
 863         if (ret) {
 864                 dev_err(&pdev->dev, "Failed to register decoder\n");
 865                 goto err_rm_enc_func;
 866         }
 867
 868         ret = media_device_register(&vpu->mdev);
 869         if (ret) {
 870                 v4l2_err(&vpu->v4l2_dev, "Failed to register mem2mem media device\n");
 871                 goto err_rm_dec_func;
 872         }
 873
 874         return 0;
 875
 876 err_rm_dec_func:
 877         hantro_remove_dec_func(vpu);
 878 err_rm_enc_func:
 879         hantro_remove_enc_func(vpu);
 880 err_m2m_rel:
 881         media_device_cleanup(&vpu->mdev);
 882         v4l2_m2m_release(vpu->m2m_dev);
 883 err_v4l2_unreg:
 884         v4l2_device_unregister(&vpu->v4l2_dev);
 885 err_clk_unprepare:
 886         clk_bulk_unprepare(vpu->variant->num_clocks, vpu->clocks);
 887         pm_runtime_dont_use_autosuspend(vpu->dev);
 888         pm_runtime_disable(vpu->dev);
 889         return ret;
 890 }
 891
 892 static int hantro_remove(struct platform_device *pdev)
 893 {
 894         struct hantro_dev *vpu = platform_get_drvdata(pdev);
 895
 896         v4l2_info(&vpu->v4l2_dev, "Removing %s\n", pdev->name);
 897
 898         media_device_unregister(&vpu->mdev);
 899         hantro_remove_dec_func(vpu);
 900         hantro_remove_enc_func(vpu);
 901         media_device_cleanup(&vpu->mdev);
 902         v4l2_m2m_release(vpu->m2m_dev);
 903         v4l2_device_unregister(&vpu->v4l2_dev);
 904         clk_bulk_unprepare(vpu->variant->num_clocks, vpu->clocks);
 905         pm_runtime_dont_use_autosuspend(vpu->dev);
 906         pm_runtime_disable(vpu->dev);
 907         return 0;
 908 }
 909
 910 #ifdef CONFIG_PM
 911 static int hantro_runtime_resume(struct device *dev)
 912 {
 913         struct hantro_dev *vpu = dev_get_drvdata(dev);
 914
 915         if (vpu->variant->runtime_resume)
 916                 return vpu->variant->runtime_resume(vpu);
 917
 918         return 0;
 919 }
 920 #endif
 921
 922 static const struct dev_pm_ops hantro_pm_ops = {
 923         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 924                                 pm_runtime_force_resume)
 925         SET_RUNTIME_PM_OPS(NULL, hantro_runtime_resume, NULL)
 926 };
 927
 928 static struct platform_driver hantro_driver = {
 929         .probe = hantro_probe,
 930         .remove = hantro_remove,
 931         .driver = {
 932                    .name = DRIVER_NAME,
 933                    .of_match_table = of_match_ptr(of_hantro_match),
 934                    .pm = &hantro_pm_ops,
 935         },
 936 };
 937 module_platform_driver(hantro_driver);
 938
 939 MODULE_LICENSE("GPL v2");
 940 MODULE_AUTHOR("Alpha Lin <Alpha.Lin@Rock-Chips.com>");
 941 MODULE_AUTHOR("Tomasz Figa <tfiga@chromium.org>");
 942 MODULE_AUTHOR("Ezequiel Garcia <ezequiel@collabora.com>");
 943 MODULE_DESCRIPTION("Hantro VPU codec driver");