drivers/media/platform/samsung/exynos4-is/fimc-isp-video.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
   4  *
   5  * FIMC-IS ISP video input and video output DMA interface driver
   6  *
   7  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   8  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   9  *
  10  * The hardware handling code derived from a driver written by
  11  * Younghwan Joo <yhwan.joo@samsung.com>.
  12  */
  13
  14 #include <linux/bitops.h>
  15 #include <linux/device.h>
  16 #include <linux/delay.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/types.h>
  21 #include <linux/printk.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/slab.h>
  24 #include <linux/videodev2.h>
  25
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/videobuf2-v4l2.h>
  29 #include <media/videobuf2-dma-contig.h>
  30 #include <media/drv-intf/exynos-fimc.h>
  31
  32 #include "common.h"
  33 #include "media-dev.h"
  34 #include "fimc-is.h"
  35 #include "fimc-isp-video.h"
  36 #include "fimc-is-param.h"
  37
  38 static int isp_video_capture_queue_setup(struct vb2_queue *vq,
  39                         unsigned int *num_buffers, unsigned int *num_planes,
  40                         unsigned int sizes[], struct device *alloc_devs[])
  41 {
  42         struct fimc_isp *isp = vb2_get_drv_priv(vq);
  43         const struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt;
  44         const struct fimc_fmt *fmt = isp->video_capture.format;
  45         unsigned int wh, i;
  46
  47         wh = vid_fmt->width * vid_fmt->height;
  48
  49         if (fmt == NULL)
  50                 return -EINVAL;
  51
  52         *num_buffers = clamp_t(u32, *num_buffers, FIMC_ISP_REQ_BUFS_MIN,
  53                                                 FIMC_ISP_REQ_BUFS_MAX);
  54         if (*num_planes) {
  55                 if (*num_planes != fmt->memplanes)
  56                         return -EINVAL;
  57                 for (i = 0; i < *num_planes; i++)
  58                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
  59                                 return -EINVAL;
  60                 return 0;
  61         }
  62
  63         *num_planes = fmt->memplanes;
  64
  65         for (i = 0; i < fmt->memplanes; i++)
  66                 sizes[i] = (wh * fmt->depth[i]) / 8;
  67
  68         return 0;
  69 }
  70
  71 static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is)
  72 {
  73         return &__get_curr_is_config(is)->isp.dma2_output;
  74 }
  75
  76 static int isp_video_capture_start_streaming(struct vb2_queue *q,
  77                                                 unsigned int count)
  78 {
  79         struct fimc_isp *isp = vb2_get_drv_priv(q);
  80         struct fimc_is *is = fimc_isp_to_is(isp);
  81         struct param_dma_output *dma = __get_isp_dma2(is);
  82         struct fimc_is_video *video = &isp->video_capture;
  83         int ret;
  84
  85         if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) ||
  86             test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
  87                 return 0;
  88
  89
  90         dma->cmd = DMA_OUTPUT_COMMAND_ENABLE;
  91         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE;
  92         dma->buffer_address = is->is_dma_p_region +
  93                                 DMA2_OUTPUT_ADDR_ARRAY_OFFS;
  94         dma->buffer_number = video->reqbufs_count;
  95         dma->dma_out_mask = video->buf_mask;
  96
  97         isp_dbg(2, &video->ve.vdev,
  98                 "buf_count: %d, planes: %d, dma addr table: %#x\n",
  99                 video->buf_count, video->format->memplanes,
 100                 dma->buffer_address);
 101
 102         fimc_is_mem_barrier();
 103
 104         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 105         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 106
 107         ret = fimc_is_itf_s_param(is, false);
 108         if (ret < 0)
 109                 return ret;
 110
 111         ret = fimc_pipeline_call(&video->ve, set_stream, 1);
 112         if (ret < 0)
 113                 return ret;
 114
 115         set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 116         return ret;
 117 }
 118
 119 static void isp_video_capture_stop_streaming(struct vb2_queue *q)
 120 {
 121         struct fimc_isp *isp = vb2_get_drv_priv(q);
 122         struct fimc_is *is = fimc_isp_to_is(isp);
 123         struct param_dma_output *dma = __get_isp_dma2(is);
 124         int ret;
 125
 126         ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0);
 127         if (ret < 0)
 128                 return;
 129
 130         dma->cmd = DMA_OUTPUT_COMMAND_DISABLE;
 131         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE;
 132         dma->buffer_number = 0;
 133         dma->buffer_address = 0;
 134         dma->dma_out_mask = 0;
 135
 136         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 137         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 138
 139         ret = fimc_is_itf_s_param(is, false);
 140         if (ret < 0)
 141                 dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__);
 142
 143         fimc_is_hw_set_isp_buf_mask(is, 0);
 144
 145         clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 146         clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 147
 148         isp->video_capture.buf_count = 0;
 149 }
 150
 151 static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb)
 152 {
 153         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 154         struct fimc_is_video *video = &isp->video_capture;
 155         int i;
 156
 157         if (video->format == NULL)
 158                 return -EINVAL;
 159
 160         for (i = 0; i < video->format->memplanes; i++) {
 161                 unsigned long size = video->pixfmt.plane_fmt[i].sizeimage;
 162
 163                 if (vb2_plane_size(vb, i) < size) {
 164                         v4l2_err(&video->ve.vdev,
 165                                  "User buffer too small (%ld < %ld)\n",
 166                                  vb2_plane_size(vb, i), size);
 167                         return -EINVAL;
 168                 }
 169                 vb2_set_plane_payload(vb, i, size);
 170         }
 171
 172         /* Check if we get one of the already known buffers. */
 173         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 174                 dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 175                 int i;
 176
 177                 for (i = 0; i < video->buf_count; i++)
 178                         if (video->buffers[i]->dma_addr[0] == dma_addr)
 179                                 return 0;
 180                 return -ENXIO;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static void isp_video_capture_buffer_queue(struct vb2_buffer *vb)
 187 {
 188         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 189         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 190         struct fimc_is_video *video = &isp->video_capture;
 191         struct fimc_is *is = fimc_isp_to_is(isp);
 192         struct isp_video_buf *ivb = to_isp_video_buf(vbuf);
 193         unsigned long flags;
 194         unsigned int i;
 195
 196         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 197                 spin_lock_irqsave(&is->slock, flags);
 198                 video->buf_mask |= BIT(ivb->index);
 199                 spin_unlock_irqrestore(&is->slock, flags);
 200         } else {
 201                 unsigned int num_planes = video->format->memplanes;
 202
 203                 ivb->index = video->buf_count;
 204                 video->buffers[ivb->index] = ivb;
 205
 206                 for (i = 0; i < num_planes; i++) {
 207                         int buf_index = ivb->index * num_planes + i;
 208
 209                         ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 210                         is->is_p_region->shared[32 + buf_index] =
 211                                                         ivb->dma_addr[i];
 212
 213                         isp_dbg(2, &video->ve.vdev,
 214                                 "dma_buf %d (%d/%d/%d) addr: %pad\n",
 215                                 buf_index, ivb->index, i, vb->index,
 216                                 &ivb->dma_addr[i]);
 217                 }
 218
 219                 if (++video->buf_count < video->reqbufs_count)
 220                         return;
 221
 222                 video->buf_mask = (1UL << video->buf_count) - 1;
 223                 set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 224         }
 225
 226         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
 227                 isp_video_capture_start_streaming(vb->vb2_queue, 0);
 228 }
 229
 230 /*
 231  * FIMC-IS ISP input and output DMA interface interrupt handler.
 232  * Locking: called with is->slock spinlock held.
 233  */
 234 void fimc_isp_video_irq_handler(struct fimc_is *is)
 235 {
 236         struct fimc_is_video *video = &is->isp.video_capture;
 237         struct vb2_v4l2_buffer *vbuf;
 238         int buf_index;
 239
 240         /* TODO: Ensure the DMA is really stopped in stop_streaming callback */
 241         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state))
 242                 return;
 243
 244         buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count;
 245         vbuf = &video->buffers[buf_index]->vb;
 246
 247         vbuf->vb2_buf.timestamp = ktime_get_ns();
 248         vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 249
 250         video->buf_mask &= ~BIT(buf_index);
 251         fimc_is_hw_set_isp_buf_mask(is, video->buf_mask);
 252 }
 253
 254 static const struct vb2_ops isp_video_capture_qops = {
 255         .queue_setup     = isp_video_capture_queue_setup,
 256         .buf_prepare     = isp_video_capture_buffer_prepare,
 257         .buf_queue       = isp_video_capture_buffer_queue,
 258         .wait_prepare    = vb2_ops_wait_prepare,
 259         .wait_finish     = vb2_ops_wait_finish,
 260         .start_streaming = isp_video_capture_start_streaming,
 261         .stop_streaming  = isp_video_capture_stop_streaming,
 262 };
 263
 264 static int isp_video_open(struct file *file)
 265 {
 266         struct fimc_isp *isp = video_drvdata(file);
 267         struct exynos_video_entity *ve = &isp->video_capture.ve;
 268         struct media_entity *me = &ve->vdev.entity;
 269         int ret;
 270
 271         if (mutex_lock_interruptible(&isp->video_lock))
 272                 return -ERESTARTSYS;
 273
 274         ret = v4l2_fh_open(file);
 275         if (ret < 0)
 276                 goto unlock;
 277
 278         ret = pm_runtime_resume_and_get(&isp->pdev->dev);
 279         if (ret < 0)
 280                 goto rel_fh;
 281
 282         if (v4l2_fh_is_singular_file(file)) {
 283                 mutex_lock(&me->graph_obj.mdev->graph_mutex);
 284
 285                 ret = fimc_pipeline_call(ve, open, me, true);
 286
 287                 /* Mark the video pipeline as in use. */
 288                 if (ret == 0)
 289                         me->use_count++;
 290
 291                 mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 292         }
 293         if (!ret)
 294                 goto unlock;
 295 rel_fh:
 296         v4l2_fh_release(file);
 297 unlock:
 298         mutex_unlock(&isp->video_lock);
 299         return ret;
 300 }
 301
 302 static int isp_video_release(struct file *file)
 303 {
 304         struct fimc_isp *isp = video_drvdata(file);
 305         struct fimc_is_video *ivc = &isp->video_capture;
 306         struct media_entity *entity = &ivc->ve.vdev.entity;
 307         struct media_device *mdev = entity->graph_obj.mdev;
 308         bool is_singular_file;
 309
 310         mutex_lock(&isp->video_lock);
 311
 312         is_singular_file = v4l2_fh_is_singular_file(file);
 313
 314         if (is_singular_file && ivc->streaming) {
 315                 video_device_pipeline_stop(&ivc->ve.vdev);
 316                 ivc->streaming = 0;
 317         }
 318
 319         _vb2_fop_release(file, NULL);
 320
 321         if (is_singular_file) {
 322                 fimc_pipeline_call(&ivc->ve, close);
 323
 324                 mutex_lock(&mdev->graph_mutex);
 325                 entity->use_count--;
 326                 mutex_unlock(&mdev->graph_mutex);
 327         }
 328
 329         pm_runtime_put(&isp->pdev->dev);
 330         mutex_unlock(&isp->video_lock);
 331
 332         return 0;
 333 }
 334
 335 static const struct v4l2_file_operations isp_video_fops = {
 336         .owner          = THIS_MODULE,
 337         .open           = isp_video_open,
 338         .release        = isp_video_release,
 339         .poll           = vb2_fop_poll,
 340         .unlocked_ioctl = video_ioctl2,
 341         .mmap           = vb2_fop_mmap,
 342 };
 343
 344 /*
 345  * Video node ioctl operations
 346  */
 347 static int isp_video_querycap(struct file *file, void *priv,
 348                                         struct v4l2_capability *cap)
 349 {
 350         struct fimc_isp *isp = video_drvdata(file);
 351
 352         __fimc_vidioc_querycap(&isp->pdev->dev, cap);
 353         return 0;
 354 }
 355
 356 static int isp_video_enum_fmt(struct file *file, void *priv,
 357                               struct v4l2_fmtdesc *f)
 358 {
 359         const struct fimc_fmt *fmt;
 360
 361         if (f->index >= FIMC_ISP_NUM_FORMATS)
 362                 return -EINVAL;
 363
 364         fmt = fimc_isp_find_format(NULL, NULL, f->index);
 365         if (WARN_ON(fmt == NULL))
 366                 return -EINVAL;
 367
 368         f->pixelformat = fmt->fourcc;
 369
 370         return 0;
 371 }
 372
 373 static int isp_video_g_fmt_mplane(struct file *file, void *fh,
 374                                         struct v4l2_format *f)
 375 {
 376         struct fimc_isp *isp = video_drvdata(file);
 377
 378         f->fmt.pix_mp = isp->video_capture.pixfmt;
 379         return 0;
 380 }
 381
 382 static void __isp_video_try_fmt(struct fimc_isp *isp,
 383                                 struct v4l2_pix_format_mplane *pixm,
 384                                 const struct fimc_fmt **fmt)
 385 {
 386         const struct fimc_fmt *__fmt;
 387
 388         __fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
 389
 390         if (fmt)
 391                 *fmt = __fmt;
 392
 393         pixm->colorspace = V4L2_COLORSPACE_SRGB;
 394         pixm->field = V4L2_FIELD_NONE;
 395         pixm->num_planes = __fmt->memplanes;
 396         pixm->pixelformat = __fmt->fourcc;
 397         /*
 398          * TODO: double check with the docmentation these width/height
 399          * constraints are correct.
 400          */
 401         v4l_bound_align_image(&pixm->width, FIMC_ISP_SOURCE_WIDTH_MIN,
 402                               FIMC_ISP_SOURCE_WIDTH_MAX, 3,
 403                               &pixm->height, FIMC_ISP_SOURCE_HEIGHT_MIN,
 404                               FIMC_ISP_SOURCE_HEIGHT_MAX, 0, 0);
 405 }
 406
 407 static int isp_video_try_fmt_mplane(struct file *file, void *fh,
 408                                         struct v4l2_format *f)
 409 {
 410         struct fimc_isp *isp = video_drvdata(file);
 411
 412         __isp_video_try_fmt(isp, &f->fmt.pix_mp, NULL);
 413         return 0;
 414 }
 415
 416 static int isp_video_s_fmt_mplane(struct file *file, void *priv,
 417                                         struct v4l2_format *f)
 418 {
 419         struct fimc_isp *isp = video_drvdata(file);
 420         struct fimc_is *is = fimc_isp_to_is(isp);
 421         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 422         const struct fimc_fmt *ifmt = NULL;
 423         struct param_dma_output *dma = __get_isp_dma2(is);
 424
 425         __isp_video_try_fmt(isp, pixm, &ifmt);
 426
 427         if (WARN_ON(ifmt == NULL))
 428                 return -EINVAL;
 429
 430         dma->format = DMA_OUTPUT_FORMAT_BAYER;
 431         dma->order = DMA_OUTPUT_ORDER_GB_BG;
 432         dma->plane = ifmt->memplanes;
 433         dma->bitwidth = ifmt->depth[0];
 434         dma->width = pixm->width;
 435         dma->height = pixm->height;
 436
 437         fimc_is_mem_barrier();
 438
 439         isp->video_capture.format = ifmt;
 440         isp->video_capture.pixfmt = *pixm;
 441
 442         return 0;
 443 }
 444
 445 /*
 446  * Check for source/sink format differences at each link.
 447  * Return 0 if the formats match or -EPIPE otherwise.
 448  */
 449 static int isp_video_pipeline_validate(struct fimc_isp *isp)
 450 {
 451         struct v4l2_subdev *sd = &isp->subdev;
 452         struct media_pad *pad;
 453         int ret;
 454
 455         while (1) {
 456                 struct v4l2_subdev_format sink_fmt = {
 457                         .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 458                 };
 459                 struct v4l2_subdev_format src_fmt = {
 460                         .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 461                 };
 462
 463                 /* Retrieve format at the sink pad */
 464                 pad = &sd->entity.pads[0];
 465                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 466                         break;
 467                 sink_fmt.pad = pad->index;
 468                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
 469                 if (ret < 0 && ret != -ENOIOCTLCMD)
 470                         return -EPIPE;
 471
 472                 /* Retrieve format at the source pad */
 473                 pad = media_pad_remote_pad_first(pad);
 474                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 475                         break;
 476
 477                 sd = media_entity_to_v4l2_subdev(pad->entity);
 478                 src_fmt.pad = pad->index;
 479                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 480                 if (ret < 0 && ret != -ENOIOCTLCMD)
 481                         return -EPIPE;
 482
 483                 if (src_fmt.format.width != sink_fmt.format.width ||
 484                     src_fmt.format.height != sink_fmt.format.height ||
 485                     src_fmt.format.code != sink_fmt.format.code)
 486                         return -EPIPE;
 487         }
 488
 489         return 0;
 490 }
 491
 492 static int isp_video_streamon(struct file *file, void *priv,
 493                                       enum v4l2_buf_type type)
 494 {
 495         struct fimc_isp *isp = video_drvdata(file);
 496         struct exynos_video_entity *ve = &isp->video_capture.ve;
 497         int ret;
 498
 499         ret = video_device_pipeline_start(&ve->vdev, &ve->pipe->mp);
 500         if (ret < 0)
 501                 return ret;
 502
 503         ret = isp_video_pipeline_validate(isp);
 504         if (ret < 0)
 505                 goto p_stop;
 506
 507         ret = vb2_ioctl_streamon(file, priv, type);
 508         if (ret < 0)
 509                 goto p_stop;
 510
 511         isp->video_capture.streaming = 1;
 512         return 0;
 513 p_stop:
 514         video_device_pipeline_stop(&ve->vdev);
 515         return ret;
 516 }
 517
 518 static int isp_video_streamoff(struct file *file, void *priv,
 519                                         enum v4l2_buf_type type)
 520 {
 521         struct fimc_isp *isp = video_drvdata(file);
 522         struct fimc_is_video *video = &isp->video_capture;
 523         int ret;
 524
 525         ret = vb2_ioctl_streamoff(file, priv, type);
 526         if (ret < 0)
 527                 return ret;
 528
 529         video_device_pipeline_stop(&video->ve.vdev);
 530         video->streaming = 0;
 531         return 0;
 532 }
 533
 534 static int isp_video_reqbufs(struct file *file, void *priv,
 535                                 struct v4l2_requestbuffers *rb)
 536 {
 537         struct fimc_isp *isp = video_drvdata(file);
 538         int ret;
 539
 540         ret = vb2_ioctl_reqbufs(file, priv, rb);
 541         if (ret < 0)
 542                 return ret;
 543
 544         if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) {
 545                 rb->count = 0;
 546                 vb2_ioctl_reqbufs(file, priv, rb);
 547                 ret = -ENOMEM;
 548         }
 549
 550         isp->video_capture.reqbufs_count = rb->count;
 551         return ret;
 552 }
 553
 554 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
 555         .vidioc_querycap                = isp_video_querycap,
 556         .vidioc_enum_fmt_vid_cap        = isp_video_enum_fmt,
 557         .vidioc_try_fmt_vid_cap_mplane  = isp_video_try_fmt_mplane,
 558         .vidioc_s_fmt_vid_cap_mplane    = isp_video_s_fmt_mplane,
 559         .vidioc_g_fmt_vid_cap_mplane    = isp_video_g_fmt_mplane,
 560         .vidioc_reqbufs                 = isp_video_reqbufs,
 561         .vidioc_querybuf                = vb2_ioctl_querybuf,
 562         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 563         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 564         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 565         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 566         .vidioc_streamon                = isp_video_streamon,
 567         .vidioc_streamoff               = isp_video_streamoff,
 568 };
 569
 570 int fimc_isp_video_device_register(struct fimc_isp *isp,
 571                                    struct v4l2_device *v4l2_dev,
 572                                    enum v4l2_buf_type type)
 573 {
 574         struct vb2_queue *q = &isp->video_capture.vb_queue;
 575         struct fimc_is_video *iv;
 576         struct video_device *vdev;
 577         int ret;
 578
 579         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 580                 iv = &isp->video_capture;
 581         else
 582                 return -ENOSYS;
 583
 584         mutex_init(&isp->video_lock);
 585         INIT_LIST_HEAD(&iv->pending_buf_q);
 586         INIT_LIST_HEAD(&iv->active_buf_q);
 587         iv->format = fimc_isp_find_format(NULL, NULL, 0);
 588         iv->pixfmt.width = IS_DEFAULT_WIDTH;
 589         iv->pixfmt.height = IS_DEFAULT_HEIGHT;
 590         iv->pixfmt.pixelformat = iv->format->fourcc;
 591         iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB;
 592         iv->reqbufs_count = 0;
 593
 594         memset(q, 0, sizeof(*q));
 595         q->type = type;
 596         q->io_modes = VB2_MMAP | VB2_USERPTR;
 597         q->ops = &isp_video_capture_qops;
 598         q->mem_ops = &vb2_dma_contig_memops;
 599         q->buf_struct_size = sizeof(struct isp_video_buf);
 600         q->drv_priv = isp;
 601         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 602         q->lock = &isp->video_lock;
 603         q->dev = &isp->pdev->dev;
 604
 605         ret = vb2_queue_init(q);
 606         if (ret < 0)
 607                 return ret;
 608
 609         vdev = &iv->ve.vdev;
 610         memset(vdev, 0, sizeof(*vdev));
 611         strscpy(vdev->name, "fimc-is-isp.capture", sizeof(vdev->name));
 612         vdev->queue = q;
 613         vdev->fops = &isp_video_fops;
 614         vdev->ioctl_ops = &isp_video_ioctl_ops;
 615         vdev->v4l2_dev = v4l2_dev;
 616         vdev->minor = -1;
 617         vdev->release = video_device_release_empty;
 618         vdev->lock = &isp->video_lock;
 619         vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE;
 620
 621         iv->pad.flags = MEDIA_PAD_FL_SINK;
 622         ret = media_entity_pads_init(&vdev->entity, 1, &iv->pad);
 623         if (ret < 0)
 624                 return ret;
 625
 626         video_set_drvdata(vdev, isp);
 627
 628         ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
 629         if (ret < 0) {
 630                 media_entity_cleanup(&vdev->entity);
 631                 return ret;
 632         }
 633
 634         v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
 635                   vdev->name, video_device_node_name(vdev));
 636
 637         return 0;
 638 }
 639
 640 void fimc_isp_video_device_unregister(struct fimc_isp *isp,
 641                                       enum v4l2_buf_type type)
 642 {
 643         struct exynos_video_entity *ve;
 644
 645         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 646                 ve = &isp->video_capture.ve;
 647         else
 648                 return;
 649
 650         mutex_lock(&isp->video_lock);
 651
 652         if (video_is_registered(&ve->vdev)) {
 653                 video_unregister_device(&ve->vdev);
 654                 media_entity_cleanup(&ve->vdev.entity);
 655                 ve->pipe = NULL;
 656         }
 657
 658         mutex_unlock(&isp->video_lock);
 659 }