drivers/staging/media/tegra-video/vi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2020 NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #include <linux/bitmap.h>
   7 #include <linux/clk.h>
   8 #include <linux/delay.h>
   9 #include <linux/host1x.h>
  10 #include <linux/lcm.h>
  11 #include <linux/list.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/of_graph.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regulator/consumer.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/slab.h>
  20
  21 #include <media/v4l2-dv-timings.h>
  22 #include <media/v4l2-event.h>
  23 #include <media/v4l2-fh.h>
  24 #include <media/v4l2-fwnode.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/videobuf2-dma-contig.h>
  27
  28 #include <soc/tegra/pmc.h>
  29
  30 #include "vi.h"
  31 #include "video.h"
  32
  33 #define MAX_CID_CONTROLS                3
  34
  35 /**
  36  * struct tegra_vi_graph_entity - Entity in the video graph
  37  *
  38  * @asd: subdev asynchronous registration information
  39  * @entity: media entity from the corresponding V4L2 subdev
  40  * @subdev: V4L2 subdev
  41  */
  42 struct tegra_vi_graph_entity {
  43         struct v4l2_async_connection asd;
  44         struct media_entity *entity;
  45         struct v4l2_subdev *subdev;
  46 };
  47
  48 static inline struct tegra_vi *
  49 host1x_client_to_vi(struct host1x_client *client)
  50 {
  51         return container_of(client, struct tegra_vi, client);
  52 }
  53
  54 static inline struct tegra_channel_buffer *
  55 to_tegra_channel_buffer(struct vb2_v4l2_buffer *vb)
  56 {
  57         return container_of(vb, struct tegra_channel_buffer, buf);
  58 }
  59
  60 static inline struct tegra_vi_graph_entity *
  61 to_tegra_vi_graph_entity(struct v4l2_async_connection *asd)
  62 {
  63         return container_of(asd, struct tegra_vi_graph_entity, asd);
  64 }
  65
  66 static int tegra_get_format_idx_by_code(struct tegra_vi *vi,
  67                                         unsigned int code,
  68                                         unsigned int offset)
  69 {
  70         unsigned int i;
  71
  72         for (i = offset; i < vi->soc->nformats; ++i) {
  73                 if (vi->soc->video_formats[i].code == code)
  74                         return i;
  75         }
  76
  77         return -1;
  78 }
  79
  80 static u32 tegra_get_format_fourcc_by_idx(struct tegra_vi *vi,
  81                                           unsigned int index)
  82 {
  83         if (index >= vi->soc->nformats)
  84                 return -EINVAL;
  85
  86         return vi->soc->video_formats[index].fourcc;
  87 }
  88
  89 static const struct tegra_video_format *
  90 tegra_get_format_by_fourcc(struct tegra_vi *vi, u32 fourcc)
  91 {
  92         unsigned int i;
  93
  94         for (i = 0; i < vi->soc->nformats; ++i) {
  95                 if (vi->soc->video_formats[i].fourcc == fourcc)
  96                         return &vi->soc->video_formats[i];
  97         }
  98
  99         return NULL;
 100 }
 101
 102 /*
 103  * videobuf2 queue operations
 104  */
 105
 106 static int tegra_channel_queue_setup(struct vb2_queue *vq,
 107                                      unsigned int *nbuffers,
 108                                      unsigned int *nplanes,
 109                                      unsigned int sizes[],
 110                                      struct device *alloc_devs[])
 111 {
 112         struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
 113
 114         if (*nplanes)
 115                 return sizes[0] < chan->format.sizeimage ? -EINVAL : 0;
 116
 117         *nplanes = 1;
 118         sizes[0] = chan->format.sizeimage;
 119         alloc_devs[0] = chan->vi->dev;
 120
 121         if (chan->vi->ops->channel_queue_setup)
 122                 chan->vi->ops->channel_queue_setup(chan);
 123
 124         return 0;
 125 }
 126
 127 static int tegra_channel_buffer_prepare(struct vb2_buffer *vb)
 128 {
 129         struct tegra_vi_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
 130         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 131         struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
 132         unsigned long size = chan->format.sizeimage;
 133
 134         if (vb2_plane_size(vb, 0) < size) {
 135                 v4l2_err(chan->video.v4l2_dev,
 136                          "buffer too small (%lu < %lu)\n",
 137                          vb2_plane_size(vb, 0), size);
 138                 return -EINVAL;
 139         }
 140
 141         vb2_set_plane_payload(vb, 0, size);
 142         buf->chan = chan;
 143         buf->addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 144
 145         return 0;
 146 }
 147
 148 static void tegra_channel_buffer_queue(struct vb2_buffer *vb)
 149 {
 150         struct tegra_vi_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
 151         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 152         struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
 153
 154         /* put buffer into the capture queue */
 155         spin_lock(&chan->start_lock);
 156         list_add_tail(&buf->queue, &chan->capture);
 157         spin_unlock(&chan->start_lock);
 158
 159         /* wait up kthread for capture */
 160         wake_up_interruptible(&chan->start_wait);
 161 }
 162
 163 struct v4l2_subdev *
 164 tegra_channel_get_remote_csi_subdev(struct tegra_vi_channel *chan)
 165 {
 166         struct media_pad *pad;
 167
 168         pad = media_pad_remote_pad_first(&chan->pad);
 169         if (!pad)
 170                 return NULL;
 171
 172         return media_entity_to_v4l2_subdev(pad->entity);
 173 }
 174
 175 /*
 176  * Walk up the chain until the initial source (e.g. image sensor)
 177  */
 178 struct v4l2_subdev *
 179 tegra_channel_get_remote_source_subdev(struct tegra_vi_channel *chan)
 180 {
 181         struct media_pad *pad;
 182         struct v4l2_subdev *subdev;
 183         struct media_entity *entity;
 184
 185         subdev = tegra_channel_get_remote_csi_subdev(chan);
 186         if (!subdev)
 187                 return NULL;
 188
 189         pad = &subdev->entity.pads[0];
 190         while (!(pad->flags & MEDIA_PAD_FL_SOURCE)) {
 191                 pad = media_pad_remote_pad_first(pad);
 192                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 193                         break;
 194                 entity = pad->entity;
 195                 pad = &entity->pads[0];
 196                 subdev = media_entity_to_v4l2_subdev(entity);
 197         }
 198
 199         return subdev;
 200 }
 201
 202 static int tegra_channel_enable_stream(struct tegra_vi_channel *chan)
 203 {
 204         struct v4l2_subdev *subdev;
 205         int ret;
 206
 207         subdev = tegra_channel_get_remote_csi_subdev(chan);
 208         ret = v4l2_subdev_call(subdev, video, s_stream, true);
 209         if (ret < 0 && ret != -ENOIOCTLCMD)
 210                 return ret;
 211
 212         return 0;
 213 }
 214
 215 static int tegra_channel_disable_stream(struct tegra_vi_channel *chan)
 216 {
 217         struct v4l2_subdev *subdev;
 218         int ret;
 219
 220         subdev = tegra_channel_get_remote_csi_subdev(chan);
 221         ret = v4l2_subdev_call(subdev, video, s_stream, false);
 222         if (ret < 0 && ret != -ENOIOCTLCMD)
 223                 return ret;
 224
 225         return 0;
 226 }
 227
 228 int tegra_channel_set_stream(struct tegra_vi_channel *chan, bool on)
 229 {
 230         int ret;
 231
 232         if (on)
 233                 ret = tegra_channel_enable_stream(chan);
 234         else
 235                 ret = tegra_channel_disable_stream(chan);
 236
 237         return ret;
 238 }
 239
 240 void tegra_channel_release_buffers(struct tegra_vi_channel *chan,
 241                                    enum vb2_buffer_state state)
 242 {
 243         struct tegra_channel_buffer *buf, *nbuf;
 244
 245         spin_lock(&chan->start_lock);
 246         list_for_each_entry_safe(buf, nbuf, &chan->capture, queue) {
 247                 vb2_buffer_done(&buf->buf.vb2_buf, state);
 248                 list_del(&buf->queue);
 249         }
 250         spin_unlock(&chan->start_lock);
 251
 252         spin_lock(&chan->done_lock);
 253         list_for_each_entry_safe(buf, nbuf, &chan->done, queue) {
 254                 vb2_buffer_done(&buf->buf.vb2_buf, state);
 255                 list_del(&buf->queue);
 256         }
 257         spin_unlock(&chan->done_lock);
 258 }
 259
 260 static int tegra_channel_start_streaming(struct vb2_queue *vq, u32 count)
 261 {
 262         struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
 263         int ret;
 264
 265         ret = pm_runtime_resume_and_get(chan->vi->dev);
 266         if (ret < 0) {
 267                 dev_err(chan->vi->dev, "failed to get runtime PM: %d\n", ret);
 268                 return ret;
 269         }
 270
 271         ret = chan->vi->ops->vi_start_streaming(vq, count);
 272         if (ret < 0)
 273                 pm_runtime_put(chan->vi->dev);
 274
 275         return ret;
 276 }
 277
 278 static void tegra_channel_stop_streaming(struct vb2_queue *vq)
 279 {
 280         struct tegra_vi_channel *chan = vb2_get_drv_priv(vq);
 281
 282         chan->vi->ops->vi_stop_streaming(vq);
 283         pm_runtime_put(chan->vi->dev);
 284 }
 285
 286 static const struct vb2_ops tegra_channel_queue_qops = {
 287         .queue_setup = tegra_channel_queue_setup,
 288         .buf_prepare = tegra_channel_buffer_prepare,
 289         .buf_queue = tegra_channel_buffer_queue,
 290         .wait_prepare = vb2_ops_wait_prepare,
 291         .wait_finish = vb2_ops_wait_finish,
 292         .start_streaming = tegra_channel_start_streaming,
 293         .stop_streaming = tegra_channel_stop_streaming,
 294 };
 295
 296 /*
 297  * V4L2 ioctl operations
 298  */
 299 static int tegra_channel_querycap(struct file *file, void *fh,
 300                                   struct v4l2_capability *cap)
 301 {
 302         struct tegra_vi_channel *chan = video_drvdata(file);
 303
 304         strscpy(cap->driver, "tegra-video", sizeof(cap->driver));
 305         strscpy(cap->card, chan->video.name, sizeof(cap->card));
 306         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 307                  dev_name(chan->vi->dev));
 308
 309         return 0;
 310 }
 311
 312 static int tegra_channel_g_parm(struct file *file, void *fh,
 313                                 struct v4l2_streamparm *a)
 314 {
 315         struct tegra_vi_channel *chan = video_drvdata(file);
 316         struct v4l2_subdev *subdev;
 317
 318         subdev = tegra_channel_get_remote_source_subdev(chan);
 319         return v4l2_g_parm_cap(&chan->video, subdev, a);
 320 }
 321
 322 static int tegra_channel_s_parm(struct file *file, void *fh,
 323                                 struct v4l2_streamparm *a)
 324 {
 325         struct tegra_vi_channel *chan = video_drvdata(file);
 326         struct v4l2_subdev *subdev;
 327
 328         subdev = tegra_channel_get_remote_source_subdev(chan);
 329         return v4l2_s_parm_cap(&chan->video, subdev, a);
 330 }
 331
 332 static int tegra_channel_enum_framesizes(struct file *file, void *fh,
 333                                          struct v4l2_frmsizeenum *sizes)
 334 {
 335         int ret;
 336         struct tegra_vi_channel *chan = video_drvdata(file);
 337         struct v4l2_subdev *subdev;
 338         const struct tegra_video_format *fmtinfo;
 339         struct v4l2_subdev_frame_size_enum fse = {
 340                 .index = sizes->index,
 341                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 342         };
 343
 344         fmtinfo = tegra_get_format_by_fourcc(chan->vi, sizes->pixel_format);
 345         if (!fmtinfo)
 346                 return -EINVAL;
 347
 348         fse.code = fmtinfo->code;
 349
 350         subdev = tegra_channel_get_remote_source_subdev(chan);
 351         ret = v4l2_subdev_call(subdev, pad, enum_frame_size, NULL, &fse);
 352         if (ret)
 353                 return ret;
 354
 355         sizes->type = V4L2_FRMSIZE_TYPE_DISCRETE;
 356         sizes->discrete.width = fse.max_width;
 357         sizes->discrete.height = fse.max_height;
 358
 359         return 0;
 360 }
 361
 362 static int tegra_channel_enum_frameintervals(struct file *file, void *fh,
 363                                              struct v4l2_frmivalenum *ivals)
 364 {
 365         int ret;
 366         struct tegra_vi_channel *chan = video_drvdata(file);
 367         struct v4l2_subdev *subdev;
 368         const struct tegra_video_format *fmtinfo;
 369         struct v4l2_subdev_frame_interval_enum fie = {
 370                 .index = ivals->index,
 371                 .width = ivals->width,
 372                 .height = ivals->height,
 373                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 374         };
 375
 376         fmtinfo = tegra_get_format_by_fourcc(chan->vi, ivals->pixel_format);
 377         if (!fmtinfo)
 378                 return -EINVAL;
 379
 380         fie.code = fmtinfo->code;
 381
 382         subdev = tegra_channel_get_remote_source_subdev(chan);
 383         ret = v4l2_subdev_call(subdev, pad, enum_frame_interval, NULL, &fie);
 384         if (ret)
 385                 return ret;
 386
 387         ivals->type = V4L2_FRMIVAL_TYPE_DISCRETE;
 388         ivals->discrete.numerator = fie.interval.numerator;
 389         ivals->discrete.denominator = fie.interval.denominator;
 390
 391         return 0;
 392 }
 393
 394 static int tegra_channel_enum_format(struct file *file, void *fh,
 395                                      struct v4l2_fmtdesc *f)
 396 {
 397         struct tegra_vi_channel *chan = video_drvdata(file);
 398         unsigned int index = 0, i;
 399         unsigned long *fmts_bitmap = chan->tpg_fmts_bitmap;
 400
 401         if (!IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG))
 402                 fmts_bitmap = chan->fmts_bitmap;
 403
 404         if (f->index >= bitmap_weight(fmts_bitmap, MAX_FORMAT_NUM))
 405                 return -EINVAL;
 406
 407         for (i = 0; i < f->index + 1; i++, index++)
 408                 index = find_next_bit(fmts_bitmap, MAX_FORMAT_NUM, index);
 409
 410         f->pixelformat = tegra_get_format_fourcc_by_idx(chan->vi, index - 1);
 411
 412         return 0;
 413 }
 414
 415 static int tegra_channel_get_format(struct file *file, void *fh,
 416                                     struct v4l2_format *format)
 417 {
 418         struct tegra_vi_channel *chan = video_drvdata(file);
 419
 420         format->fmt.pix = chan->format;
 421
 422         return 0;
 423 }
 424
 425 static int __tegra_channel_try_format(struct tegra_vi_channel *chan,
 426                                       struct v4l2_pix_format *pix)
 427 {
 428         const struct tegra_video_format *fmtinfo;
 429         static struct lock_class_key key;
 430         struct v4l2_subdev *subdev;
 431         struct v4l2_subdev_format fmt = {
 432                 .which = V4L2_SUBDEV_FORMAT_TRY,
 433         };
 434         struct v4l2_subdev_state *sd_state;
 435         struct v4l2_subdev_frame_size_enum fse = {
 436                 .which = V4L2_SUBDEV_FORMAT_TRY,
 437         };
 438         struct v4l2_subdev_selection sdsel = {
 439                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 440                 .target = V4L2_SEL_TGT_CROP_BOUNDS,
 441         };
 442         struct v4l2_rect *try_crop;
 443         int ret;
 444
 445         subdev = tegra_channel_get_remote_source_subdev(chan);
 446         if (!subdev)
 447                 return -ENODEV;
 448
 449         /*
 450          * FIXME: Drop this call, drivers are not supposed to use
 451          * __v4l2_subdev_state_alloc().
 452          */
 453         sd_state = __v4l2_subdev_state_alloc(subdev, "tegra:state->lock",
 454                                              &key);
 455         if (IS_ERR(sd_state))
 456                 return PTR_ERR(sd_state);
 457         /*
 458          * Retrieve the format information and if requested format isn't
 459          * supported, keep the current format.
 460          */
 461         fmtinfo = tegra_get_format_by_fourcc(chan->vi, pix->pixelformat);
 462         if (!fmtinfo) {
 463                 pix->pixelformat = chan->format.pixelformat;
 464                 pix->colorspace = chan->format.colorspace;
 465                 fmtinfo = tegra_get_format_by_fourcc(chan->vi,
 466                                                      pix->pixelformat);
 467         }
 468
 469         pix->field = V4L2_FIELD_NONE;
 470         fmt.pad = 0;
 471         v4l2_fill_mbus_format(&fmt.format, pix, fmtinfo->code);
 472
 473         /*
 474          * Attempt to obtain the format size from subdev.
 475          * If not available, try to get crop boundary from subdev.
 476          */
 477         try_crop = v4l2_subdev_state_get_crop(sd_state, 0);
 478         fse.code = fmtinfo->code;
 479         ret = v4l2_subdev_call(subdev, pad, enum_frame_size, sd_state, &fse);
 480         if (ret) {
 481                 if (!v4l2_subdev_has_op(subdev, pad, get_selection)) {
 482                         try_crop->width = 0;
 483                         try_crop->height = 0;
 484                 } else {
 485                         ret = v4l2_subdev_call(subdev, pad, get_selection,
 486                                                NULL, &sdsel);
 487                         if (ret)
 488                                 return -EINVAL;
 489
 490                         try_crop->width = sdsel.r.width;
 491                         try_crop->height = sdsel.r.height;
 492                 }
 493         } else {
 494                 try_crop->width = fse.max_width;
 495                 try_crop->height = fse.max_height;
 496         }
 497
 498         ret = v4l2_subdev_call(subdev, pad, set_fmt, sd_state, &fmt);
 499         if (ret < 0)
 500                 return ret;
 501
 502         v4l2_fill_pix_format(pix, &fmt.format);
 503         chan->vi->ops->vi_fmt_align(pix, fmtinfo->bpp);
 504
 505         __v4l2_subdev_state_free(sd_state);
 506
 507         return 0;
 508 }
 509
 510 static int tegra_channel_try_format(struct file *file, void *fh,
 511                                     struct v4l2_format *format)
 512 {
 513         struct tegra_vi_channel *chan = video_drvdata(file);
 514
 515         return __tegra_channel_try_format(chan, &format->fmt.pix);
 516 }
 517
 518 static void tegra_channel_update_gangports(struct tegra_vi_channel *chan)
 519 {
 520         if (chan->format.width <= 1920)
 521                 chan->numgangports = 1;
 522         else
 523                 chan->numgangports = chan->totalports;
 524 }
 525
 526 static int tegra_channel_set_format(struct file *file, void *fh,
 527                                     struct v4l2_format *format)
 528 {
 529         struct tegra_vi_channel *chan = video_drvdata(file);
 530         const struct tegra_video_format *fmtinfo;
 531         struct v4l2_subdev_format fmt = {
 532                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 533         };
 534         struct v4l2_subdev *subdev;
 535         struct v4l2_pix_format *pix = &format->fmt.pix;
 536         int ret;
 537
 538         if (vb2_is_busy(&chan->queue))
 539                 return -EBUSY;
 540
 541         /* get supported format by try_fmt */
 542         ret = __tegra_channel_try_format(chan, pix);
 543         if (ret)
 544                 return ret;
 545
 546         fmtinfo = tegra_get_format_by_fourcc(chan->vi, pix->pixelformat);
 547
 548         fmt.pad = 0;
 549         v4l2_fill_mbus_format(&fmt.format, pix, fmtinfo->code);
 550         subdev = tegra_channel_get_remote_source_subdev(chan);
 551         ret = v4l2_subdev_call(subdev, pad, set_fmt, NULL, &fmt);
 552         if (ret < 0)
 553                 return ret;
 554
 555         v4l2_fill_pix_format(pix, &fmt.format);
 556         chan->vi->ops->vi_fmt_align(pix, fmtinfo->bpp);
 557
 558         chan->format = *pix;
 559         chan->fmtinfo = fmtinfo;
 560         tegra_channel_update_gangports(chan);
 561
 562         return 0;
 563 }
 564
 565 static int tegra_channel_set_subdev_active_fmt(struct tegra_vi_channel *chan)
 566 {
 567         int ret, index;
 568         struct v4l2_subdev *subdev;
 569         struct v4l2_subdev_format fmt = {
 570                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 571         };
 572
 573         /*
 574          * Initialize channel format to the sub-device active format if there
 575          * is corresponding match in the Tegra supported video formats.
 576          */
 577         subdev = tegra_channel_get_remote_source_subdev(chan);
 578         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 579         if (ret)
 580                 return ret;
 581
 582         index = tegra_get_format_idx_by_code(chan->vi, fmt.format.code, 0);
 583         if (index < 0)
 584                 return -EINVAL;
 585
 586         chan->fmtinfo = &chan->vi->soc->video_formats[index];
 587         v4l2_fill_pix_format(&chan->format, &fmt.format);
 588         chan->format.pixelformat = chan->fmtinfo->fourcc;
 589         chan->format.bytesperline = chan->format.width * chan->fmtinfo->bpp;
 590         chan->format.sizeimage = chan->format.bytesperline *
 591                                  chan->format.height;
 592         chan->vi->ops->vi_fmt_align(&chan->format, chan->fmtinfo->bpp);
 593         tegra_channel_update_gangports(chan);
 594
 595         return 0;
 596 }
 597
 598 static int
 599 tegra_channel_subscribe_event(struct v4l2_fh *fh,
 600                               const struct v4l2_event_subscription *sub)
 601 {
 602         switch (sub->type) {
 603         case V4L2_EVENT_SOURCE_CHANGE:
 604                 return v4l2_event_subscribe(fh, sub, 4, NULL);
 605         }
 606
 607         return v4l2_ctrl_subscribe_event(fh, sub);
 608 }
 609
 610 static int tegra_channel_g_selection(struct file *file, void *priv,
 611                                      struct v4l2_selection *sel)
 612 {
 613         struct tegra_vi_channel *chan = video_drvdata(file);
 614         struct v4l2_subdev *subdev;
 615         struct v4l2_subdev_format fmt = {
 616                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 617         };
 618         struct v4l2_subdev_selection sdsel = {
 619                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 620                 .target = sel->target,
 621         };
 622         int ret;
 623
 624         subdev = tegra_channel_get_remote_source_subdev(chan);
 625         if (!v4l2_subdev_has_op(subdev, pad, get_selection))
 626                 return -ENOTTY;
 627
 628         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 629                 return -EINVAL;
 630         /*
 631          * Try the get selection operation and fallback to get format if not
 632          * implemented.
 633          */
 634         ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
 635         if (!ret)
 636                 sel->r = sdsel.r;
 637         if (ret != -ENOIOCTLCMD)
 638                 return ret;
 639
 640         ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
 641         if (ret < 0)
 642                 return ret;
 643
 644         sel->r.left = 0;
 645         sel->r.top = 0;
 646         sel->r.width = fmt.format.width;
 647         sel->r.height = fmt.format.height;
 648
 649         return 0;
 650 }
 651
 652 static int tegra_channel_s_selection(struct file *file, void *fh,
 653                                      struct v4l2_selection *sel)
 654 {
 655         struct tegra_vi_channel *chan = video_drvdata(file);
 656         struct v4l2_subdev *subdev;
 657         int ret;
 658         struct v4l2_subdev_selection sdsel = {
 659                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 660                 .target = sel->target,
 661                 .flags = sel->flags,
 662                 .r = sel->r,
 663         };
 664
 665         subdev = tegra_channel_get_remote_source_subdev(chan);
 666         if (!v4l2_subdev_has_op(subdev, pad, set_selection))
 667                 return -ENOTTY;
 668
 669         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 670                 return -EINVAL;
 671
 672         if (vb2_is_busy(&chan->queue))
 673                 return -EBUSY;
 674
 675         ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
 676         if (!ret) {
 677                 sel->r = sdsel.r;
 678                 /*
 679                  * Subdev active format resolution may have changed during
 680                  * set selection operation. So, update channel format to
 681                  * the sub-device active format.
 682                  */
 683                 return tegra_channel_set_subdev_active_fmt(chan);
 684         }
 685
 686         return ret;
 687 }
 688
 689 static int tegra_channel_g_edid(struct file *file, void *fh,
 690                                 struct v4l2_edid *edid)
 691 {
 692         struct tegra_vi_channel *chan = video_drvdata(file);
 693         struct v4l2_subdev *subdev;
 694
 695         subdev = tegra_channel_get_remote_source_subdev(chan);
 696         if (!v4l2_subdev_has_op(subdev, pad, get_edid))
 697                 return -ENOTTY;
 698
 699         return v4l2_subdev_call(subdev, pad, get_edid, edid);
 700 }
 701
 702 static int tegra_channel_s_edid(struct file *file, void *fh,
 703                                 struct v4l2_edid *edid)
 704 {
 705         struct tegra_vi_channel *chan = video_drvdata(file);
 706         struct v4l2_subdev *subdev;
 707
 708         subdev = tegra_channel_get_remote_source_subdev(chan);
 709         if (!v4l2_subdev_has_op(subdev, pad, set_edid))
 710                 return -ENOTTY;
 711
 712         return v4l2_subdev_call(subdev, pad, set_edid, edid);
 713 }
 714
 715 static int tegra_channel_g_dv_timings(struct file *file, void *fh,
 716                                       struct v4l2_dv_timings *timings)
 717 {
 718         struct tegra_vi_channel *chan = video_drvdata(file);
 719         struct v4l2_subdev *subdev;
 720
 721         subdev = tegra_channel_get_remote_source_subdev(chan);
 722         if (!v4l2_subdev_has_op(subdev, video, g_dv_timings))
 723                 return -ENOTTY;
 724
 725         return v4l2_device_call_until_err(chan->video.v4l2_dev, 0,
 726                                           video, g_dv_timings, timings);
 727 }
 728
 729 static int tegra_channel_s_dv_timings(struct file *file, void *fh,
 730                                       struct v4l2_dv_timings *timings)
 731 {
 732         struct tegra_vi_channel *chan = video_drvdata(file);
 733         struct v4l2_subdev *subdev;
 734         struct v4l2_bt_timings *bt = &timings->bt;
 735         struct v4l2_dv_timings curr_timings;
 736         int ret;
 737
 738         subdev = tegra_channel_get_remote_source_subdev(chan);
 739         if (!v4l2_subdev_has_op(subdev, video, s_dv_timings))
 740                 return -ENOTTY;
 741
 742         ret = tegra_channel_g_dv_timings(file, fh, &curr_timings);
 743         if (ret)
 744                 return ret;
 745
 746         if (v4l2_match_dv_timings(timings, &curr_timings, 0, false))
 747                 return 0;
 748
 749         if (vb2_is_busy(&chan->queue))
 750                 return -EBUSY;
 751
 752         ret = v4l2_device_call_until_err(chan->video.v4l2_dev, 0,
 753                                          video, s_dv_timings, timings);
 754         if (ret)
 755                 return ret;
 756
 757         chan->format.width = bt->width;
 758         chan->format.height = bt->height;
 759         chan->format.bytesperline = bt->width * chan->fmtinfo->bpp;
 760         chan->format.sizeimage = chan->format.bytesperline * bt->height;
 761         chan->vi->ops->vi_fmt_align(&chan->format, chan->fmtinfo->bpp);
 762         tegra_channel_update_gangports(chan);
 763
 764         return 0;
 765 }
 766
 767 static int tegra_channel_query_dv_timings(struct file *file, void *fh,
 768                                           struct v4l2_dv_timings *timings)
 769 {
 770         struct tegra_vi_channel *chan = video_drvdata(file);
 771         struct v4l2_subdev *subdev;
 772
 773         subdev = tegra_channel_get_remote_source_subdev(chan);
 774         if (!v4l2_subdev_has_op(subdev, video, query_dv_timings))
 775                 return -ENOTTY;
 776
 777         return v4l2_device_call_until_err(chan->video.v4l2_dev, 0,
 778                                           video, query_dv_timings, timings);
 779 }
 780
 781 static int tegra_channel_enum_dv_timings(struct file *file, void *fh,
 782                                          struct v4l2_enum_dv_timings *timings)
 783 {
 784         struct tegra_vi_channel *chan = video_drvdata(file);
 785         struct v4l2_subdev *subdev;
 786
 787         subdev = tegra_channel_get_remote_source_subdev(chan);
 788         if (!v4l2_subdev_has_op(subdev, pad, enum_dv_timings))
 789                 return -ENOTTY;
 790
 791         return v4l2_subdev_call(subdev, pad, enum_dv_timings, timings);
 792 }
 793
 794 static int tegra_channel_dv_timings_cap(struct file *file, void *fh,
 795                                         struct v4l2_dv_timings_cap *cap)
 796 {
 797         struct tegra_vi_channel *chan = video_drvdata(file);
 798         struct v4l2_subdev *subdev;
 799
 800         subdev = tegra_channel_get_remote_source_subdev(chan);
 801         if (!v4l2_subdev_has_op(subdev, pad, dv_timings_cap))
 802                 return -ENOTTY;
 803
 804         return v4l2_subdev_call(subdev, pad, dv_timings_cap, cap);
 805 }
 806
 807 static int tegra_channel_log_status(struct file *file, void *fh)
 808 {
 809         struct tegra_vi_channel *chan = video_drvdata(file);
 810
 811         v4l2_device_call_all(chan->video.v4l2_dev, 0, core, log_status);
 812
 813         return 0;
 814 }
 815
 816 static int tegra_channel_enum_input(struct file *file, void *fh,
 817                                     struct v4l2_input *inp)
 818 {
 819         struct tegra_vi_channel *chan = video_drvdata(file);
 820         struct v4l2_subdev *subdev;
 821
 822         if (inp->index)
 823                 return -EINVAL;
 824
 825         inp->type = V4L2_INPUT_TYPE_CAMERA;
 826         subdev = tegra_channel_get_remote_source_subdev(chan);
 827         strscpy(inp->name, subdev->name, sizeof(inp->name));
 828         if (v4l2_subdev_has_op(subdev, pad, dv_timings_cap))
 829                 inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
 830
 831         return 0;
 832 }
 833
 834 static int tegra_channel_g_input(struct file *file, void *priv,
 835                                  unsigned int *i)
 836 {
 837         *i = 0;
 838
 839         return 0;
 840 }
 841
 842 static int tegra_channel_s_input(struct file *file, void *priv,
 843                                  unsigned int input)
 844 {
 845         if (input > 0)
 846                 return -EINVAL;
 847
 848         return 0;
 849 }
 850
 851 static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = {
 852         .vidioc_querycap                = tegra_channel_querycap,
 853         .vidioc_g_parm                  = tegra_channel_g_parm,
 854         .vidioc_s_parm                  = tegra_channel_s_parm,
 855         .vidioc_enum_framesizes         = tegra_channel_enum_framesizes,
 856         .vidioc_enum_frameintervals     = tegra_channel_enum_frameintervals,
 857         .vidioc_enum_fmt_vid_cap        = tegra_channel_enum_format,
 858         .vidioc_g_fmt_vid_cap           = tegra_channel_get_format,
 859         .vidioc_s_fmt_vid_cap           = tegra_channel_set_format,
 860         .vidioc_try_fmt_vid_cap         = tegra_channel_try_format,
 861         .vidioc_enum_input              = tegra_channel_enum_input,
 862         .vidioc_g_input                 = tegra_channel_g_input,
 863         .vidioc_s_input                 = tegra_channel_s_input,
 864         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 865         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 866         .vidioc_querybuf                = vb2_ioctl_querybuf,
 867         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 868         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 869         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 870         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 871         .vidioc_streamon                = vb2_ioctl_streamon,
 872         .vidioc_streamoff               = vb2_ioctl_streamoff,
 873         .vidioc_subscribe_event         = tegra_channel_subscribe_event,
 874         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 875         .vidioc_g_selection             = tegra_channel_g_selection,
 876         .vidioc_s_selection             = tegra_channel_s_selection,
 877         .vidioc_g_edid                  = tegra_channel_g_edid,
 878         .vidioc_s_edid                  = tegra_channel_s_edid,
 879         .vidioc_g_dv_timings            = tegra_channel_g_dv_timings,
 880         .vidioc_s_dv_timings            = tegra_channel_s_dv_timings,
 881         .vidioc_query_dv_timings        = tegra_channel_query_dv_timings,
 882         .vidioc_enum_dv_timings         = tegra_channel_enum_dv_timings,
 883         .vidioc_dv_timings_cap          = tegra_channel_dv_timings_cap,
 884         .vidioc_log_status              = tegra_channel_log_status,
 885 };
 886
 887 /*
 888  * V4L2 file operations
 889  */
 890 static const struct v4l2_file_operations tegra_channel_fops = {
 891         .owner          = THIS_MODULE,
 892         .unlocked_ioctl = video_ioctl2,
 893         .open           = v4l2_fh_open,
 894         .release        = vb2_fop_release,
 895         .read           = vb2_fop_read,
 896         .poll           = vb2_fop_poll,
 897         .mmap           = vb2_fop_mmap,
 898 };
 899
 900 /*
 901  * V4L2 control operations
 902  */
 903 static int vi_s_ctrl(struct v4l2_ctrl *ctrl)
 904 {
 905         struct tegra_vi_channel *chan = container_of(ctrl->handler,
 906                                                      struct tegra_vi_channel,
 907                                                      ctrl_handler);
 908
 909         switch (ctrl->id) {
 910         case V4L2_CID_TEST_PATTERN:
 911                 /* pattern change takes effect on next stream */
 912                 chan->pg_mode = ctrl->val + 1;
 913                 break;
 914         case V4L2_CID_TEGRA_SYNCPT_TIMEOUT_RETRY:
 915                 chan->syncpt_timeout_retry = ctrl->val;
 916                 break;
 917         case V4L2_CID_HFLIP:
 918                 chan->hflip = ctrl->val;
 919                 break;
 920         case V4L2_CID_VFLIP:
 921                 chan->vflip = ctrl->val;
 922                 break;
 923         default:
 924                 return -EINVAL;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static const struct v4l2_ctrl_ops vi_ctrl_ops = {
 931         .s_ctrl = vi_s_ctrl,
 932 };
 933
 934 #if IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG)
 935 static const char *const vi_pattern_strings[] = {
 936         "Black/White Direct Mode",
 937         "Color Patch Mode",
 938 };
 939 #else
 940 static const struct v4l2_ctrl_config syncpt_timeout_ctrl = {
 941         .ops = &vi_ctrl_ops,
 942         .id = V4L2_CID_TEGRA_SYNCPT_TIMEOUT_RETRY,
 943         .name = "Syncpt timeout retry",
 944         .type = V4L2_CTRL_TYPE_INTEGER,
 945         .min = 1,
 946         .max = 10000,
 947         .step = 1,
 948         .def = 5,
 949 };
 950 #endif
 951
 952 static int tegra_channel_setup_ctrl_handler(struct tegra_vi_channel *chan)
 953 {
 954         int ret;
 955
 956 #if IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG)
 957         /* add test pattern control handler to v4l2 device */
 958         v4l2_ctrl_new_std_menu_items(&chan->ctrl_handler, &vi_ctrl_ops,
 959                                      V4L2_CID_TEST_PATTERN,
 960                                      ARRAY_SIZE(vi_pattern_strings) - 1,
 961                                      0, 0, vi_pattern_strings);
 962         if (chan->ctrl_handler.error) {
 963                 dev_err(chan->vi->dev, "failed to add TPG ctrl handler: %d\n",
 964                         chan->ctrl_handler.error);
 965                 v4l2_ctrl_handler_free(&chan->ctrl_handler);
 966                 return chan->ctrl_handler.error;
 967         }
 968 #else
 969         struct v4l2_subdev *subdev;
 970
 971         /* custom control */
 972         v4l2_ctrl_new_custom(&chan->ctrl_handler, &syncpt_timeout_ctrl, NULL);
 973         if (chan->ctrl_handler.error) {
 974                 dev_err(chan->vi->dev, "failed to add %s ctrl handler: %d\n",
 975                         syncpt_timeout_ctrl.name,
 976                         chan->ctrl_handler.error);
 977                 v4l2_ctrl_handler_free(&chan->ctrl_handler);
 978                 return chan->ctrl_handler.error;
 979         }
 980
 981         subdev = tegra_channel_get_remote_source_subdev(chan);
 982         if (!subdev)
 983                 return -ENODEV;
 984
 985         ret = v4l2_ctrl_add_handler(&chan->ctrl_handler, subdev->ctrl_handler,
 986                                     NULL, true);
 987         if (ret < 0) {
 988                 dev_err(chan->vi->dev,
 989                         "failed to add subdev %s ctrl handler: %d\n",
 990                         subdev->name, ret);
 991                 v4l2_ctrl_handler_free(&chan->ctrl_handler);
 992                 return ret;
 993         }
 994
 995         if (chan->vi->soc->has_h_v_flip) {
 996                 v4l2_ctrl_new_std(&chan->ctrl_handler, &vi_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
 997                 v4l2_ctrl_new_std(&chan->ctrl_handler, &vi_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
 998         }
 999
1000 #endif
1001
1002         /* setup the controls */
1003         ret = v4l2_ctrl_handler_setup(&chan->ctrl_handler);
1004         if (ret < 0) {
1005                 dev_err(chan->vi->dev,
1006                         "failed to setup v4l2 ctrl handler: %d\n", ret);
1007                 return ret;
1008         }
1009
1010         return 0;
1011 }
1012
1013 /* VI only support 2 formats in TPG mode */
1014 static void vi_tpg_fmts_bitmap_init(struct tegra_vi_channel *chan)
1015 {
1016         int index;
1017
1018         bitmap_zero(chan->tpg_fmts_bitmap, MAX_FORMAT_NUM);
1019
1020         index = tegra_get_format_idx_by_code(chan->vi,
1021                                              MEDIA_BUS_FMT_SRGGB10_1X10, 0);
1022         bitmap_set(chan->tpg_fmts_bitmap, index, 1);
1023
1024         index = tegra_get_format_idx_by_code(chan->vi,
1025                                              MEDIA_BUS_FMT_RGB888_1X32_PADHI,
1026                                              0);
1027         bitmap_set(chan->tpg_fmts_bitmap, index, 1);
1028 }
1029
1030 static int vi_fmts_bitmap_init(struct tegra_vi_channel *chan)
1031 {
1032         int index, ret, match_code = 0;
1033         struct v4l2_subdev *subdev;
1034         struct v4l2_subdev_mbus_code_enum code = {
1035                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1036         };
1037
1038         bitmap_zero(chan->fmts_bitmap, MAX_FORMAT_NUM);
1039
1040         /*
1041          * Set the bitmap bits based on all the matched formats between the
1042          * available media bus formats of sub-device and the pre-defined Tegra
1043          * supported video formats.
1044          */
1045         subdev = tegra_channel_get_remote_source_subdev(chan);
1046         while (1) {
1047                 ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
1048                                        NULL, &code);
1049                 if (ret < 0)
1050                         break;
1051
1052                 index = tegra_get_format_idx_by_code(chan->vi, code.code, 0);
1053                 while (index >= 0) {
1054                         bitmap_set(chan->fmts_bitmap, index, 1);
1055                         if (!match_code)
1056                                 match_code = code.code;
1057                         /* look for other formats with same mbus code */
1058                         index = tegra_get_format_idx_by_code(chan->vi,
1059                                                              code.code,
1060                                                              index + 1);
1061                 }
1062
1063                 code.index++;
1064         }
1065
1066         /*
1067          * Set the bitmap bit corresponding to default tegra video format if
1068          * there are no matched formats.
1069          */
1070         if (!match_code) {
1071                 match_code = chan->vi->soc->default_video_format->code;
1072                 index = tegra_get_format_idx_by_code(chan->vi, match_code, 0);
1073                 if (WARN_ON(index < 0))
1074                         return -EINVAL;
1075
1076                 bitmap_set(chan->fmts_bitmap, index, 1);
1077         }
1078
1079         /* initialize channel format to the sub-device active format */
1080         tegra_channel_set_subdev_active_fmt(chan);
1081
1082         return 0;
1083 }
1084
1085 static void tegra_channel_cleanup(struct tegra_vi_channel *chan)
1086 {
1087         v4l2_ctrl_handler_free(&chan->ctrl_handler);
1088         media_entity_cleanup(&chan->video.entity);
1089         chan->vi->ops->channel_host1x_syncpt_free(chan);
1090         mutex_destroy(&chan->video_lock);
1091 }
1092
1093 void tegra_channels_cleanup(struct tegra_vi *vi)
1094 {
1095         struct tegra_vi_channel *chan, *tmp;
1096
1097         if (!vi)
1098                 return;
1099
1100         list_for_each_entry_safe(chan, tmp, &vi->vi_chans, list) {
1101                 tegra_channel_cleanup(chan);
1102                 list_del(&chan->list);
1103                 kfree(chan);
1104         }
1105 }
1106
1107 static int tegra_channel_init(struct tegra_vi_channel *chan)
1108 {
1109         struct tegra_vi *vi = chan->vi;
1110         struct tegra_video_device *vid = dev_get_drvdata(vi->client.host);
1111         int ret;
1112
1113         mutex_init(&chan->video_lock);
1114         INIT_LIST_HEAD(&chan->capture);
1115         INIT_LIST_HEAD(&chan->done);
1116         spin_lock_init(&chan->start_lock);
1117         spin_lock_init(&chan->done_lock);
1118         init_waitqueue_head(&chan->start_wait);
1119         init_waitqueue_head(&chan->done_wait);
1120
1121         /* initialize the video format */
1122         chan->fmtinfo = chan->vi->soc->default_video_format;
1123         chan->format.pixelformat = chan->fmtinfo->fourcc;
1124         chan->format.colorspace = V4L2_COLORSPACE_SRGB;
1125         chan->format.field = V4L2_FIELD_NONE;
1126         chan->format.width = TEGRA_DEF_WIDTH;
1127         chan->format.height = TEGRA_DEF_HEIGHT;
1128         chan->format.bytesperline = TEGRA_DEF_WIDTH * chan->fmtinfo->bpp;
1129         chan->format.sizeimage = chan->format.bytesperline * TEGRA_DEF_HEIGHT;
1130         vi->ops->vi_fmt_align(&chan->format, chan->fmtinfo->bpp);
1131
1132         ret = vi->ops->channel_host1x_syncpt_init(chan);
1133         if (ret)
1134                 return ret;
1135
1136         /* initialize the media entity */
1137         chan->pad.flags = MEDIA_PAD_FL_SINK;
1138         ret = media_entity_pads_init(&chan->video.entity, 1, &chan->pad);
1139         if (ret < 0) {
1140                 dev_err(vi->dev,
1141                         "failed to initialize media entity: %d\n", ret);
1142                 goto free_syncpts;
1143         }
1144
1145         ret = v4l2_ctrl_handler_init(&chan->ctrl_handler, MAX_CID_CONTROLS);
1146         if (chan->ctrl_handler.error) {
1147                 dev_err(vi->dev,
1148                         "failed to initialize v4l2 ctrl handler: %d\n", ret);
1149                 goto cleanup_media;
1150         }
1151
1152         /* initialize the video_device */
1153         chan->video.fops = &tegra_channel_fops;
1154         chan->video.v4l2_dev = &vid->v4l2_dev;
1155         chan->video.release = video_device_release_empty;
1156         chan->video.queue = &chan->queue;
1157         snprintf(chan->video.name, sizeof(chan->video.name), "%s-%s-%u",
1158                  dev_name(vi->dev), "output", chan->portnos[0]);
1159         chan->video.vfl_type = VFL_TYPE_VIDEO;
1160         chan->video.vfl_dir = VFL_DIR_RX;
1161         chan->video.ioctl_ops = &tegra_channel_ioctl_ops;
1162         chan->video.ctrl_handler = &chan->ctrl_handler;
1163         chan->video.lock = &chan->video_lock;
1164         chan->video.device_caps = V4L2_CAP_VIDEO_CAPTURE |
1165                                   V4L2_CAP_STREAMING |
1166                                   V4L2_CAP_READWRITE;
1167         video_set_drvdata(&chan->video, chan);
1168
1169         chan->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1170         chan->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
1171         chan->queue.lock = &chan->video_lock;
1172         chan->queue.drv_priv = chan;
1173         chan->queue.buf_struct_size = sizeof(struct tegra_channel_buffer);
1174         chan->queue.ops = &tegra_channel_queue_qops;
1175         chan->queue.mem_ops = &vb2_dma_contig_memops;
1176         chan->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1177         chan->queue.min_queued_buffers = 2;
1178         chan->queue.dev = vi->dev;
1179         ret = vb2_queue_init(&chan->queue);
1180         if (ret < 0) {
1181                 dev_err(vi->dev, "failed to initialize vb2 queue: %d\n", ret);
1182                 goto free_v4l2_ctrl_hdl;
1183         }
1184
1185         if (!IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG))
1186                 v4l2_async_nf_init(&chan->notifier, &vid->v4l2_dev);
1187
1188         return 0;
1189
1190 free_v4l2_ctrl_hdl:
1191         v4l2_ctrl_handler_free(&chan->ctrl_handler);
1192 cleanup_media:
1193         media_entity_cleanup(&chan->video.entity);
1194 free_syncpts:
1195         vi->ops->channel_host1x_syncpt_free(chan);
1196         return ret;
1197 }
1198
1199 static int tegra_vi_channel_alloc(struct tegra_vi *vi, unsigned int port_num,
1200                                   struct device_node *node, unsigned int lanes)
1201 {
1202         struct tegra_vi_channel *chan;
1203         unsigned int i;
1204
1205         /*
1206          * Do not use devm_kzalloc as memory is freed immediately
1207          * when device instance is unbound but application might still
1208          * be holding the device node open. Channel memory allocated
1209          * with kzalloc is freed during video device release callback.
1210          */
1211         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
1212         if (!chan)
1213                 return -ENOMEM;
1214
1215         chan->vi = vi;
1216         chan->portnos[0] = port_num;
1217         /*
1218          * For data lanes more than maximum csi lanes per brick, multiple of
1219          * x4 ports are used simultaneously for capture.
1220          */
1221         if (lanes <= CSI_LANES_PER_BRICK)
1222                 chan->totalports = 1;
1223         else
1224                 chan->totalports = lanes / CSI_LANES_PER_BRICK;
1225         chan->numgangports = chan->totalports;
1226
1227         for (i = 1; i < chan->totalports; i++)
1228                 chan->portnos[i] = chan->portnos[0] + i * CSI_PORTS_PER_BRICK;
1229
1230         chan->of_node = node;
1231         list_add_tail(&chan->list, &vi->vi_chans);
1232
1233         return 0;
1234 }
1235
1236 static int tegra_vi_tpg_channels_alloc(struct tegra_vi *vi)
1237 {
1238         unsigned int port_num;
1239         unsigned int nchannels = vi->soc->vi_max_channels;
1240         int ret;
1241
1242         for (port_num = 0; port_num < nchannels; port_num++) {
1243                 ret = tegra_vi_channel_alloc(vi, port_num,
1244                                              vi->dev->of_node, 2);
1245                 if (ret < 0)
1246                         return ret;
1247         }
1248
1249         return 0;
1250 }
1251
1252 static int tegra_vi_channels_alloc(struct tegra_vi *vi)
1253 {
1254         struct device_node *node = vi->dev->of_node;
1255         struct device_node *ep = NULL;
1256         struct device_node *ports;
1257         struct device_node *port = NULL;
1258         unsigned int port_num;
1259         struct device_node *parent;
1260         struct v4l2_fwnode_endpoint v4l2_ep = { .bus_type = 0 };
1261         unsigned int lanes;
1262         int ret = 0;
1263
1264         ports = of_get_child_by_name(node, "ports");
1265         if (!ports)
1266                 return dev_err_probe(vi->dev, -ENODEV, "%pOF: missing 'ports' node\n", node);
1267
1268         for_each_child_of_node(ports, port) {
1269                 if (!of_node_name_eq(port, "port"))
1270                         continue;
1271
1272                 ret = of_property_read_u32(port, "reg", &port_num);
1273                 if (ret < 0)
1274                         continue;
1275
1276                 if (port_num > vi->soc->vi_max_channels) {
1277                         dev_err(vi->dev, "invalid port num %d for %pOF\n",
1278                                 port_num, port);
1279                         ret = -EINVAL;
1280                         goto cleanup;
1281                 }
1282
1283                 ep = of_get_child_by_name(port, "endpoint");
1284                 if (!ep)
1285                         continue;
1286
1287                 parent = of_graph_get_remote_port_parent(ep);
1288                 of_node_put(ep);
1289                 if (!parent)
1290                         continue;
1291
1292                 ep = of_graph_get_endpoint_by_regs(parent, 0, 0);
1293                 of_node_put(parent);
1294                 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep),
1295                                                  &v4l2_ep);
1296                 of_node_put(ep);
1297                 if (ret)
1298                         continue;
1299
1300                 lanes = v4l2_ep.bus.mipi_csi2.num_data_lanes;
1301                 ret = tegra_vi_channel_alloc(vi, port_num, port, lanes);
1302                 if (ret < 0)
1303                         goto cleanup;
1304         }
1305
1306 cleanup:
1307         of_node_put(port);
1308         of_node_put(ports);
1309         return ret;
1310 }
1311
1312 static int tegra_vi_channels_init(struct tegra_vi *vi)
1313 {
1314         struct tegra_vi_channel *chan;
1315         int ret;
1316
1317         list_for_each_entry(chan, &vi->vi_chans, list) {
1318                 ret = tegra_channel_init(chan);
1319                 if (ret < 0) {
1320                         dev_err(vi->dev,
1321                                 "failed to initialize channel-%d: %d\n",
1322                                 chan->portnos[0], ret);
1323                         goto cleanup;
1324                 }
1325         }
1326
1327         return 0;
1328
1329 cleanup:
1330         list_for_each_entry_continue_reverse(chan, &vi->vi_chans, list)
1331                 tegra_channel_cleanup(chan);
1332
1333         return ret;
1334 }
1335
1336 void tegra_v4l2_nodes_cleanup_tpg(struct tegra_video_device *vid)
1337 {
1338         struct tegra_vi *vi = vid->vi;
1339         struct tegra_csi *csi = vid->csi;
1340         struct tegra_csi_channel *csi_chan;
1341         struct tegra_vi_channel *chan;
1342
1343         list_for_each_entry(chan, &vi->vi_chans, list)
1344                 vb2_video_unregister_device(&chan->video);
1345
1346         list_for_each_entry(csi_chan, &csi->csi_chans, list)
1347                 v4l2_device_unregister_subdev(&csi_chan->subdev);
1348 }
1349
1350 int tegra_v4l2_nodes_setup_tpg(struct tegra_video_device *vid)
1351 {
1352         struct tegra_vi *vi = vid->vi;
1353         struct tegra_csi *csi = vid->csi;
1354         struct tegra_vi_channel *vi_chan;
1355         struct tegra_csi_channel *csi_chan;
1356         u32 link_flags = MEDIA_LNK_FL_ENABLED;
1357         int ret;
1358
1359         if (!vi || !csi)
1360                 return -ENODEV;
1361
1362         csi_chan = list_first_entry(&csi->csi_chans,
1363                                     struct tegra_csi_channel, list);
1364
1365         list_for_each_entry(vi_chan, &vi->vi_chans, list) {
1366                 struct media_entity *source = &csi_chan->subdev.entity;
1367                 struct media_entity *sink = &vi_chan->video.entity;
1368                 struct media_pad *source_pad = csi_chan->pads;
1369                 struct media_pad *sink_pad = &vi_chan->pad;
1370
1371                 ret = v4l2_device_register_subdev(&vid->v4l2_dev,
1372                                                   &csi_chan->subdev);
1373                 if (ret) {
1374                         dev_err(vi->dev,
1375                                 "failed to register subdev: %d\n", ret);
1376                         goto cleanup;
1377                 }
1378
1379                 ret = video_register_device(&vi_chan->video,
1380                                             VFL_TYPE_VIDEO, -1);
1381                 if (ret < 0) {
1382                         dev_err(vi->dev,
1383                                 "failed to register video device: %d\n", ret);
1384                         goto cleanup;
1385                 }
1386
1387                 dev_dbg(vi->dev, "creating %s:%u -> %s:%u link\n",
1388                         source->name, source_pad->index,
1389                         sink->name, sink_pad->index);
1390
1391                 ret = media_create_pad_link(source, source_pad->index,
1392                                             sink, sink_pad->index,
1393                                             link_flags);
1394                 if (ret < 0) {
1395                         dev_err(vi->dev,
1396                                 "failed to create %s:%u -> %s:%u link: %d\n",
1397                                 source->name, source_pad->index,
1398                                 sink->name, sink_pad->index, ret);
1399                         goto cleanup;
1400                 }
1401
1402                 ret = tegra_channel_setup_ctrl_handler(vi_chan);
1403                 if (ret < 0)
1404                         goto cleanup;
1405
1406                 v4l2_set_subdev_hostdata(&csi_chan->subdev, vi_chan);
1407                 vi_tpg_fmts_bitmap_init(vi_chan);
1408                 csi_chan = list_next_entry(csi_chan, list);
1409         }
1410
1411         return 0;
1412
1413 cleanup:
1414         tegra_v4l2_nodes_cleanup_tpg(vid);
1415         return ret;
1416 }
1417
1418 static int __maybe_unused vi_runtime_resume(struct device *dev)
1419 {
1420         struct tegra_vi *vi = dev_get_drvdata(dev);
1421         int ret;
1422
1423         ret = regulator_enable(vi->vdd);
1424         if (ret) {
1425                 dev_err(dev, "failed to enable VDD supply: %d\n", ret);
1426                 return ret;
1427         }
1428
1429         ret = clk_set_rate(vi->clk, vi->soc->vi_max_clk_hz);
1430         if (ret) {
1431                 dev_err(dev, "failed to set vi clock rate: %d\n", ret);
1432                 goto disable_vdd;
1433         }
1434
1435         ret = clk_prepare_enable(vi->clk);
1436         if (ret) {
1437                 dev_err(dev, "failed to enable vi clock: %d\n", ret);
1438                 goto disable_vdd;
1439         }
1440
1441         return 0;
1442
1443 disable_vdd:
1444         regulator_disable(vi->vdd);
1445         return ret;
1446 }
1447
1448 static int __maybe_unused vi_runtime_suspend(struct device *dev)
1449 {
1450         struct tegra_vi *vi = dev_get_drvdata(dev);
1451
1452         clk_disable_unprepare(vi->clk);
1453
1454         regulator_disable(vi->vdd);
1455
1456         return 0;
1457 }
1458
1459 /*
1460  * Find the entity matching a given fwnode in an v4l2_async_notifier list
1461  */
1462 static struct tegra_vi_graph_entity *
1463 tegra_vi_graph_find_entity(struct list_head *list,
1464                            const struct fwnode_handle *fwnode)
1465 {
1466         struct tegra_vi_graph_entity *entity;
1467         struct v4l2_async_connection *asd;
1468
1469         list_for_each_entry(asd, list, asc_entry) {
1470                 entity = to_tegra_vi_graph_entity(asd);
1471
1472                 if (entity->asd.match.fwnode == fwnode)
1473                         return entity;
1474         }
1475
1476         return NULL;
1477 }
1478
1479 static int tegra_vi_graph_build(struct tegra_vi_channel *chan,
1480                                 struct tegra_vi_graph_entity *entity)
1481 {
1482         struct tegra_vi *vi = chan->vi;
1483         struct tegra_vi_graph_entity *ent;
1484         struct fwnode_handle *ep = NULL;
1485         struct v4l2_fwnode_link link;
1486         struct media_entity *local = entity->entity;
1487         struct media_entity *remote;
1488         struct media_pad *local_pad;
1489         struct media_pad *remote_pad;
1490         u32 link_flags = MEDIA_LNK_FL_ENABLED;
1491         int ret = 0;
1492
1493         dev_dbg(vi->dev, "creating links for entity %s\n", local->name);
1494
1495         while (1) {
1496                 ep = fwnode_graph_get_next_endpoint(entity->asd.match.fwnode,
1497                                                     ep);
1498                 if (!ep)
1499                         break;
1500
1501                 ret = v4l2_fwnode_parse_link(ep, &link);
1502                 if (ret < 0) {
1503                         dev_err(vi->dev, "failed to parse link for %pOF: %d\n",
1504                                 to_of_node(ep), ret);
1505                         continue;
1506                 }
1507
1508                 if (link.local_port >= local->num_pads) {
1509                         dev_err(vi->dev, "invalid port number %u on %pOF\n",
1510                                 link.local_port, to_of_node(link.local_node));
1511                         v4l2_fwnode_put_link(&link);
1512                         ret = -EINVAL;
1513                         break;
1514                 }
1515
1516                 local_pad = &local->pads[link.local_port];
1517                 /* Remote node is vi node. So use channel video entity and pad
1518                  * as remote/sink.
1519                  */
1520                 if (link.remote_node == of_fwnode_handle(vi->dev->of_node)) {
1521                         remote = &chan->video.entity;
1522                         remote_pad = &chan->pad;
1523                         goto create_link;
1524                 }
1525
1526                 /*
1527                  * Skip sink ports, they will be processed from the other end
1528                  * of the link.
1529                  */
1530                 if (local_pad->flags & MEDIA_PAD_FL_SINK) {
1531                         dev_dbg(vi->dev, "skipping sink port %pOF:%u\n",
1532                                 to_of_node(link.local_node), link.local_port);
1533                         v4l2_fwnode_put_link(&link);
1534                         continue;
1535                 }
1536
1537                 /* find the remote entity from notifier list */
1538                 ent = tegra_vi_graph_find_entity(&chan->notifier.done_list,
1539                                                  link.remote_node);
1540                 if (!ent) {
1541                         dev_err(vi->dev, "no entity found for %pOF\n",
1542                                 to_of_node(link.remote_node));
1543                         v4l2_fwnode_put_link(&link);
1544                         ret = -ENODEV;
1545                         break;
1546                 }
1547
1548                 remote = ent->entity;
1549                 if (link.remote_port >= remote->num_pads) {
1550                         dev_err(vi->dev, "invalid port number %u on %pOF\n",
1551                                 link.remote_port,
1552                                 to_of_node(link.remote_node));
1553                         v4l2_fwnode_put_link(&link);
1554                         ret = -EINVAL;
1555                         break;
1556                 }
1557
1558                 remote_pad = &remote->pads[link.remote_port];
1559
1560 create_link:
1561                 dev_dbg(vi->dev, "creating %s:%u -> %s:%u link\n",
1562                         local->name, local_pad->index,
1563                         remote->name, remote_pad->index);
1564
1565                 ret = media_create_pad_link(local, local_pad->index,
1566                                             remote, remote_pad->index,
1567                                             link_flags);
1568                 v4l2_fwnode_put_link(&link);
1569                 if (ret < 0) {
1570                         dev_err(vi->dev,
1571                                 "failed to create %s:%u -> %s:%u link: %d\n",
1572                                 local->name, local_pad->index,
1573                                 remote->name, remote_pad->index, ret);
1574                         break;
1575                 }
1576         }
1577
1578         fwnode_handle_put(ep);
1579         return ret;
1580 }
1581
1582 static int tegra_vi_graph_notify_complete(struct v4l2_async_notifier *notifier)
1583 {
1584         struct tegra_vi_graph_entity *entity;
1585         struct v4l2_async_connection *asd;
1586         struct v4l2_subdev *subdev;
1587         struct tegra_vi_channel *chan;
1588         struct tegra_vi *vi;
1589         int ret;
1590
1591         chan = container_of(notifier, struct tegra_vi_channel, notifier);
1592         vi = chan->vi;
1593
1594         dev_dbg(vi->dev, "notify complete, all subdevs registered\n");
1595
1596         /*
1597          * Video device node should be created at the end of all the device
1598          * related initialization/setup.
1599          * Current video_register_device() does both initialize and register
1600          * video device in same API.
1601          *
1602          * TODO: Update v4l2-dev driver to split initialize and register into
1603          * separate APIs and then update Tegra video driver to do video device
1604          * initialize followed by all video device related setup and then
1605          * register the video device.
1606          */
1607         ret = video_register_device(&chan->video, VFL_TYPE_VIDEO, -1);
1608         if (ret < 0) {
1609                 dev_err(vi->dev,
1610                         "failed to register video device: %d\n", ret);
1611                 goto unregister_video;
1612         }
1613
1614         /* create links between the entities */
1615         list_for_each_entry(asd, &chan->notifier.done_list, asc_entry) {
1616                 entity = to_tegra_vi_graph_entity(asd);
1617                 ret = tegra_vi_graph_build(chan, entity);
1618                 if (ret < 0)
1619                         goto unregister_video;
1620         }
1621
1622         ret = tegra_channel_setup_ctrl_handler(chan);
1623         if (ret < 0) {
1624                 dev_err(vi->dev,
1625                         "failed to setup channel controls: %d\n", ret);
1626                 goto unregister_video;
1627         }
1628
1629         ret = vi_fmts_bitmap_init(chan);
1630         if (ret < 0) {
1631                 dev_err(vi->dev,
1632                         "failed to initialize formats bitmap: %d\n", ret);
1633                 goto unregister_video;
1634         }
1635
1636         subdev = tegra_channel_get_remote_csi_subdev(chan);
1637         if (!subdev) {
1638                 ret = -ENODEV;
1639                 dev_err(vi->dev,
1640                         "failed to get remote csi subdev: %d\n", ret);
1641                 goto unregister_video;
1642         }
1643
1644         v4l2_set_subdev_hostdata(subdev, chan);
1645
1646         subdev = tegra_channel_get_remote_source_subdev(chan);
1647         v4l2_set_subdev_hostdata(subdev, chan);
1648
1649         return 0;
1650
1651 unregister_video:
1652         vb2_video_unregister_device(&chan->video);
1653         return ret;
1654 }
1655
1656 static int tegra_vi_graph_notify_bound(struct v4l2_async_notifier *notifier,
1657                                        struct v4l2_subdev *subdev,
1658                                        struct v4l2_async_connection *asd)
1659 {
1660         struct tegra_vi_graph_entity *entity;
1661         struct tegra_vi *vi;
1662         struct tegra_vi_channel *chan;
1663
1664         chan = container_of(notifier, struct tegra_vi_channel, notifier);
1665         vi = chan->vi;
1666
1667         /*
1668          * Locate the entity corresponding to the bound subdev and store the
1669          * subdev pointer.
1670          */
1671         entity = tegra_vi_graph_find_entity(&chan->notifier.waiting_list,
1672                                             subdev->fwnode);
1673         if (!entity) {
1674                 dev_err(vi->dev, "no entity for subdev %s\n", subdev->name);
1675                 return -EINVAL;
1676         }
1677
1678         if (entity->subdev) {
1679                 dev_err(vi->dev, "duplicate subdev for node %pOF\n",
1680                         to_of_node(entity->asd.match.fwnode));
1681                 return -EINVAL;
1682         }
1683
1684         dev_dbg(vi->dev, "subdev %s bound\n", subdev->name);
1685         entity->entity = &subdev->entity;
1686         entity->subdev = subdev;
1687
1688         return 0;
1689 }
1690
1691 static const struct v4l2_async_notifier_operations tegra_vi_async_ops = {
1692         .bound = tegra_vi_graph_notify_bound,
1693         .complete = tegra_vi_graph_notify_complete,
1694 };
1695
1696 static int tegra_vi_graph_parse_one(struct tegra_vi_channel *chan,
1697                                     struct fwnode_handle *fwnode)
1698 {
1699         struct tegra_vi *vi = chan->vi;
1700         struct fwnode_handle *ep = NULL;
1701         struct fwnode_handle *remote = NULL;
1702         struct tegra_vi_graph_entity *tvge;
1703         struct device_node *node = NULL;
1704         int ret;
1705
1706         dev_dbg(vi->dev, "parsing node %pOF\n", to_of_node(fwnode));
1707
1708         /* parse all the remote entities and put them into the list */
1709         for_each_endpoint_of_node(to_of_node(fwnode), node) {
1710                 ep = of_fwnode_handle(node);
1711                 remote = fwnode_graph_get_remote_port_parent(ep);
1712                 if (!remote) {
1713                         dev_err(vi->dev,
1714                                 "remote device at %pOF not found\n", node);
1715                         ret = -EINVAL;
1716                         goto cleanup;
1717                 }
1718
1719                 /* skip entities that are already processed */
1720                 if (device_match_fwnode(vi->dev, remote) ||
1721                     tegra_vi_graph_find_entity(&chan->notifier.waiting_list,
1722                                                remote)) {
1723                         fwnode_handle_put(remote);
1724                         continue;
1725                 }
1726
1727                 tvge = v4l2_async_nf_add_fwnode(&chan->notifier, remote,
1728                                                 struct tegra_vi_graph_entity);
1729                 if (IS_ERR(tvge)) {
1730                         ret = PTR_ERR(tvge);
1731                         dev_err(vi->dev,
1732                                 "failed to add subdev to notifier: %d\n", ret);
1733                         fwnode_handle_put(remote);
1734                         goto cleanup;
1735                 }
1736
1737                 ret = tegra_vi_graph_parse_one(chan, remote);
1738                 if (ret < 0) {
1739                         fwnode_handle_put(remote);
1740                         goto cleanup;
1741                 }
1742
1743                 fwnode_handle_put(remote);
1744         }
1745
1746         return 0;
1747
1748 cleanup:
1749         dev_err(vi->dev, "failed parsing the graph: %d\n", ret);
1750         v4l2_async_nf_cleanup(&chan->notifier);
1751         of_node_put(node);
1752         return ret;
1753 }
1754
1755 static int tegra_vi_graph_init(struct tegra_vi *vi)
1756 {
1757         struct tegra_vi_channel *chan;
1758         struct fwnode_handle *fwnode = dev_fwnode(vi->dev);
1759         int ret;
1760
1761         /*
1762          * Walk the links to parse the full graph. Each channel will have
1763          * one endpoint of the composite node. Start by parsing the
1764          * composite node and parse the remote entities in turn.
1765          * Each channel will register a v4l2 async notifier to make the graph
1766          * independent between the channels so we can skip the current channel
1767          * in case of something wrong during graph parsing and continue with
1768          * the next channels.
1769          */
1770         list_for_each_entry(chan, &vi->vi_chans, list) {
1771                 struct fwnode_handle *ep, *remote;
1772
1773                 ep = fwnode_graph_get_endpoint_by_id(fwnode,
1774                                                      chan->portnos[0], 0, 0);
1775                 if (!ep)
1776                         continue;
1777
1778                 remote = fwnode_graph_get_remote_port_parent(ep);
1779                 fwnode_handle_put(ep);
1780
1781                 ret = tegra_vi_graph_parse_one(chan, remote);
1782                 fwnode_handle_put(remote);
1783                 if (ret < 0 || list_empty(&chan->notifier.waiting_list))
1784                         continue;
1785
1786                 chan->notifier.ops = &tegra_vi_async_ops;
1787                 ret = v4l2_async_nf_register(&chan->notifier);
1788                 if (ret < 0) {
1789                         dev_err(vi->dev,
1790                                 "failed to register channel %d notifier: %d\n",
1791                                 chan->portnos[0], ret);
1792                         v4l2_async_nf_cleanup(&chan->notifier);
1793                 }
1794         }
1795
1796         return 0;
1797 }
1798
1799 static void tegra_vi_graph_cleanup(struct tegra_vi *vi)
1800 {
1801         struct tegra_vi_channel *chan;
1802
1803         list_for_each_entry(chan, &vi->vi_chans, list) {
1804                 vb2_video_unregister_device(&chan->video);
1805                 v4l2_async_nf_unregister(&chan->notifier);
1806                 v4l2_async_nf_cleanup(&chan->notifier);
1807         }
1808 }
1809
1810 static int tegra_vi_init(struct host1x_client *client)
1811 {
1812         struct tegra_video_device *vid = dev_get_drvdata(client->host);
1813         struct tegra_vi *vi = host1x_client_to_vi(client);
1814         struct tegra_vi_channel *chan, *tmp;
1815         int ret;
1816
1817         vid->media_dev.hw_revision = vi->soc->hw_revision;
1818         snprintf(vid->media_dev.bus_info, sizeof(vid->media_dev.bus_info),
1819                  "platform:%s", dev_name(vi->dev));
1820
1821         INIT_LIST_HEAD(&vi->vi_chans);
1822
1823         if (IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG))
1824                 ret = tegra_vi_tpg_channels_alloc(vi);
1825         else
1826                 ret = tegra_vi_channels_alloc(vi);
1827         if (ret < 0)
1828                 goto free_chans;
1829
1830         ret = tegra_vi_channels_init(vi);
1831         if (ret < 0)
1832                 goto free_chans;
1833
1834         vid->vi = vi;
1835
1836         if (!IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG)) {
1837                 ret = tegra_vi_graph_init(vi);
1838                 if (ret < 0)
1839                         goto cleanup_chans;
1840         }
1841
1842         return 0;
1843
1844 cleanup_chans:
1845         list_for_each_entry(chan, &vi->vi_chans, list)
1846                 tegra_channel_cleanup(chan);
1847 free_chans:
1848         list_for_each_entry_safe(chan, tmp, &vi->vi_chans, list) {
1849                 list_del(&chan->list);
1850                 kfree(chan);
1851         }
1852
1853         return ret;
1854 }
1855
1856 static int tegra_vi_exit(struct host1x_client *client)
1857 {
1858         struct tegra_vi *vi = host1x_client_to_vi(client);
1859
1860         /*
1861          * Do not cleanup the channels here as application might still be
1862          * holding video device nodes. Channels cleanup will happen during
1863          * v4l2_device release callback which gets called after all video
1864          * device nodes are released.
1865          */
1866
1867         if (!IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG))
1868                 tegra_vi_graph_cleanup(vi);
1869
1870         return 0;
1871 }
1872
1873 static const struct host1x_client_ops vi_client_ops = {
1874         .init = tegra_vi_init,
1875         .exit = tegra_vi_exit,
1876 };
1877
1878 static int tegra_vi_probe(struct platform_device *pdev)
1879 {
1880         struct tegra_vi *vi;
1881         int ret;
1882
1883         vi = devm_kzalloc(&pdev->dev, sizeof(*vi), GFP_KERNEL);
1884         if (!vi)
1885                 return -ENOMEM;
1886
1887         vi->iomem = devm_platform_ioremap_resource(pdev, 0);
1888         if (IS_ERR(vi->iomem))
1889                 return PTR_ERR(vi->iomem);
1890
1891         vi->soc = of_device_get_match_data(&pdev->dev);
1892
1893         vi->clk = devm_clk_get(&pdev->dev, NULL);
1894         if (IS_ERR(vi->clk)) {
1895                 ret = PTR_ERR(vi->clk);
1896                 dev_err(&pdev->dev, "failed to get vi clock: %d\n", ret);
1897                 return ret;
1898         }
1899
1900         vi->vdd = devm_regulator_get(&pdev->dev, "avdd-dsi-csi");
1901         if (IS_ERR(vi->vdd)) {
1902                 ret = PTR_ERR(vi->vdd);
1903                 dev_err(&pdev->dev, "failed to get VDD supply: %d\n", ret);
1904                 return ret;
1905         }
1906
1907         if (!pdev->dev.pm_domain) {
1908                 ret = -ENOENT;
1909                 dev_warn(&pdev->dev, "PM domain is not attached: %d\n", ret);
1910                 return ret;
1911         }
1912
1913         ret = devm_of_platform_populate(&pdev->dev);
1914         if (ret < 0) {
1915                 dev_err(&pdev->dev,
1916                         "failed to populate vi child device: %d\n", ret);
1917                 return ret;
1918         }
1919
1920         vi->dev = &pdev->dev;
1921         vi->ops = vi->soc->ops;
1922         platform_set_drvdata(pdev, vi);
1923         pm_runtime_enable(&pdev->dev);
1924
1925         /* initialize host1x interface */
1926         INIT_LIST_HEAD(&vi->client.list);
1927         vi->client.ops = &vi_client_ops;
1928         vi->client.dev = &pdev->dev;
1929
1930         if (vi->ops->vi_enable)
1931                 vi->ops->vi_enable(vi, true);
1932
1933         ret = host1x_client_register(&vi->client);
1934         if (ret < 0) {
1935                 dev_err(&pdev->dev,
1936                         "failed to register host1x client: %d\n", ret);
1937                 goto rpm_disable;
1938         }
1939
1940         return 0;
1941
1942 rpm_disable:
1943         if (vi->ops->vi_enable)
1944                 vi->ops->vi_enable(vi, false);
1945         pm_runtime_disable(&pdev->dev);
1946         return ret;
1947 }
1948
1949 static void tegra_vi_remove(struct platform_device *pdev)
1950 {
1951         struct tegra_vi *vi = platform_get_drvdata(pdev);
1952
1953         host1x_client_unregister(&vi->client);
1954
1955         if (vi->ops->vi_enable)
1956                 vi->ops->vi_enable(vi, false);
1957         pm_runtime_disable(&pdev->dev);
1958 }
1959
1960 static const struct of_device_id tegra_vi_of_id_table[] = {
1961 #if defined(CONFIG_ARCH_TEGRA_2x_SOC)
1962         { .compatible = "nvidia,tegra20-vi",  .data = &tegra20_vi_soc },
1963 #endif
1964 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
1965         { .compatible = "nvidia,tegra210-vi", .data = &tegra210_vi_soc },
1966 #endif
1967         { }
1968 };
1969 MODULE_DEVICE_TABLE(of, tegra_vi_of_id_table);
1970
1971 static const struct dev_pm_ops tegra_vi_pm_ops = {
1972         SET_RUNTIME_PM_OPS(vi_runtime_suspend, vi_runtime_resume, NULL)
1973 };
1974
1975 struct platform_driver tegra_vi_driver = {
1976         .driver = {
1977                 .name = "tegra-vi",
1978                 .of_match_table = tegra_vi_of_id_table,
1979                 .pm = &tegra_vi_pm_ops,
1980         },
1981         .probe = tegra_vi_probe,
1982         .remove_new = tegra_vi_remove,
1983 };