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

   1 /*
   2  * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
   3  *
   4  * FIMC-IS ISP video input and video output DMA interface driver
   5  *
   6  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   7  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   8  *
   9  * The hardware handling code derived from a driver written by
  10  * Younghwan Joo <yhwan.joo@samsung.com>.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/bitops.h>
  18 #include <linux/device.h>
  19 #include <linux/delay.h>
  20 #include <linux/errno.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/printk.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/slab.h>
  27 #include <linux/videodev2.h>
  28
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-ioctl.h>
  31 #include <media/videobuf2-v4l2.h>
  32 #include <media/videobuf2-dma-contig.h>
  33 #include <media/drv-intf/exynos-fimc.h>
  34
  35 #include "common.h"
  36 #include "media-dev.h"
  37 #include "fimc-is.h"
  38 #include "fimc-isp-video.h"
  39 #include "fimc-is-param.h"
  40
  41 static int isp_video_capture_queue_setup(struct vb2_queue *vq,
  42                         unsigned int *num_buffers, unsigned int *num_planes,
  43                         unsigned int sizes[], struct device *alloc_devs[])
  44 {
  45         struct fimc_isp *isp = vb2_get_drv_priv(vq);
  46         struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt;
  47         const struct fimc_fmt *fmt = isp->video_capture.format;
  48         unsigned int wh, i;
  49
  50         wh = vid_fmt->width * vid_fmt->height;
  51
  52         if (fmt == NULL)
  53                 return -EINVAL;
  54
  55         *num_buffers = clamp_t(u32, *num_buffers, FIMC_ISP_REQ_BUFS_MIN,
  56                                                 FIMC_ISP_REQ_BUFS_MAX);
  57         if (*num_planes) {
  58                 if (*num_planes != fmt->memplanes)
  59                         return -EINVAL;
  60                 for (i = 0; i < *num_planes; i++)
  61                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
  62                                 return -EINVAL;
  63                 return 0;
  64         }
  65
  66         *num_planes = fmt->memplanes;
  67
  68         for (i = 0; i < fmt->memplanes; i++)
  69                 sizes[i] = (wh * fmt->depth[i]) / 8;
  70
  71         return 0;
  72 }
  73
  74 static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is)
  75 {
  76         return &__get_curr_is_config(is)->isp.dma2_output;
  77 }
  78
  79 static int isp_video_capture_start_streaming(struct vb2_queue *q,
  80                                                 unsigned int count)
  81 {
  82         struct fimc_isp *isp = vb2_get_drv_priv(q);
  83         struct fimc_is *is = fimc_isp_to_is(isp);
  84         struct param_dma_output *dma = __get_isp_dma2(is);
  85         struct fimc_is_video *video = &isp->video_capture;
  86         int ret;
  87
  88         if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) ||
  89             test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
  90                 return 0;
  91
  92
  93         dma->cmd = DMA_OUTPUT_COMMAND_ENABLE;
  94         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE;
  95         dma->buffer_address = is->is_dma_p_region +
  96                                 DMA2_OUTPUT_ADDR_ARRAY_OFFS;
  97         dma->buffer_number = video->reqbufs_count;
  98         dma->dma_out_mask = video->buf_mask;
  99
 100         isp_dbg(2, &video->ve.vdev,
 101                 "buf_count: %d, planes: %d, dma addr table: %#x\n",
 102                 video->buf_count, video->format->memplanes,
 103                 dma->buffer_address);
 104
 105         fimc_is_mem_barrier();
 106
 107         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 108         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 109
 110         ret = fimc_is_itf_s_param(is, false);
 111         if (ret < 0)
 112                 return ret;
 113
 114         ret = fimc_pipeline_call(&video->ve, set_stream, 1);
 115         if (ret < 0)
 116                 return ret;
 117
 118         set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 119         return ret;
 120 }
 121
 122 static void isp_video_capture_stop_streaming(struct vb2_queue *q)
 123 {
 124         struct fimc_isp *isp = vb2_get_drv_priv(q);
 125         struct fimc_is *is = fimc_isp_to_is(isp);
 126         struct param_dma_output *dma = __get_isp_dma2(is);
 127         int ret;
 128
 129         ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0);
 130         if (ret < 0)
 131                 return;
 132
 133         dma->cmd = DMA_OUTPUT_COMMAND_DISABLE;
 134         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE;
 135         dma->buffer_number = 0;
 136         dma->buffer_address = 0;
 137         dma->dma_out_mask = 0;
 138
 139         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 140         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 141
 142         ret = fimc_is_itf_s_param(is, false);
 143         if (ret < 0)
 144                 dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__);
 145
 146         fimc_is_hw_set_isp_buf_mask(is, 0);
 147
 148         clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 149         clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 150
 151         isp->video_capture.buf_count = 0;
 152 }
 153
 154 static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb)
 155 {
 156         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 157         struct fimc_is_video *video = &isp->video_capture;
 158         int i;
 159
 160         if (video->format == NULL)
 161                 return -EINVAL;
 162
 163         for (i = 0; i < video->format->memplanes; i++) {
 164                 unsigned long size = video->pixfmt.plane_fmt[i].sizeimage;
 165
 166                 if (vb2_plane_size(vb, i) < size) {
 167                         v4l2_err(&video->ve.vdev,
 168                                  "User buffer too small (%ld < %ld)\n",
 169                                  vb2_plane_size(vb, i), size);
 170                         return -EINVAL;
 171                 }
 172                 vb2_set_plane_payload(vb, i, size);
 173         }
 174
 175         /* Check if we get one of the already known buffers. */
 176         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 177                 dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 178                 int i;
 179
 180                 for (i = 0; i < video->buf_count; i++)
 181                         if (video->buffers[i]->dma_addr[0] == dma_addr)
 182                                 return 0;
 183                 return -ENXIO;
 184         }
 185
 186         return 0;
 187 }
 188
 189 static void isp_video_capture_buffer_queue(struct vb2_buffer *vb)
 190 {
 191         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 192         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 193         struct fimc_is_video *video = &isp->video_capture;
 194         struct fimc_is *is = fimc_isp_to_is(isp);
 195         struct isp_video_buf *ivb = to_isp_video_buf(vbuf);
 196         unsigned long flags;
 197         unsigned int i;
 198
 199         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 200                 spin_lock_irqsave(&is->slock, flags);
 201                 video->buf_mask |= BIT(ivb->index);
 202                 spin_unlock_irqrestore(&is->slock, flags);
 203         } else {
 204                 unsigned int num_planes = video->format->memplanes;
 205
 206                 ivb->index = video->buf_count;
 207                 video->buffers[ivb->index] = ivb;
 208
 209                 for (i = 0; i < num_planes; i++) {
 210                         int buf_index = ivb->index * num_planes + i;
 211
 212                         ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 213                         is->is_p_region->shared[32 + buf_index] =
 214                                                         ivb->dma_addr[i];
 215
 216                         isp_dbg(2, &video->ve.vdev,
 217                                 "dma_buf %d (%d/%d/%d) addr: %pad\n",
 218                                 buf_index, ivb->index, i, vb->index,
 219                                 &ivb->dma_addr[i]);
 220                 }
 221
 222                 if (++video->buf_count < video->reqbufs_count)
 223                         return;
 224
 225                 video->buf_mask = (1UL << video->buf_count) - 1;
 226                 set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 227         }
 228
 229         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
 230                 isp_video_capture_start_streaming(vb->vb2_queue, 0);
 231 }
 232
 233 /*
 234  * FIMC-IS ISP input and output DMA interface interrupt handler.
 235  * Locking: called with is->slock spinlock held.
 236  */
 237 void fimc_isp_video_irq_handler(struct fimc_is *is)
 238 {
 239         struct fimc_is_video *video = &is->isp.video_capture;
 240         struct vb2_v4l2_buffer *vbuf;
 241         int buf_index;
 242
 243         /* TODO: Ensure the DMA is really stopped in stop_streaming callback */
 244         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state))
 245                 return;
 246
 247         buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count;
 248         vbuf = &video->buffers[buf_index]->vb;
 249
 250         vbuf->vb2_buf.timestamp = ktime_get_ns();
 251         vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 252
 253         video->buf_mask &= ~BIT(buf_index);
 254         fimc_is_hw_set_isp_buf_mask(is, video->buf_mask);
 255 }
 256
 257 static const struct vb2_ops isp_video_capture_qops = {
 258         .queue_setup     = isp_video_capture_queue_setup,
 259         .buf_prepare     = isp_video_capture_buffer_prepare,
 260         .buf_queue       = isp_video_capture_buffer_queue,
 261         .wait_prepare    = vb2_ops_wait_prepare,
 262         .wait_finish     = vb2_ops_wait_finish,
 263         .start_streaming = isp_video_capture_start_streaming,
 264         .stop_streaming  = isp_video_capture_stop_streaming,
 265 };
 266
 267 static int isp_video_open(struct file *file)
 268 {
 269         struct fimc_isp *isp = video_drvdata(file);
 270         struct exynos_video_entity *ve = &isp->video_capture.ve;
 271         struct media_entity *me = &ve->vdev.entity;
 272         int ret;
 273
 274         if (mutex_lock_interruptible(&isp->video_lock))
 275                 return -ERESTARTSYS;
 276
 277         ret = v4l2_fh_open(file);
 278         if (ret < 0)
 279                 goto unlock;
 280
 281         ret = pm_runtime_get_sync(&isp->pdev->dev);
 282         if (ret < 0)
 283                 goto rel_fh;
 284
 285         if (v4l2_fh_is_singular_file(file)) {
 286                 mutex_lock(&me->graph_obj.mdev->graph_mutex);
 287
 288                 ret = fimc_pipeline_call(ve, open, me, true);
 289
 290                 /* Mark the video pipeline as in use. */
 291                 if (ret == 0)
 292                         me->use_count++;
 293
 294                 mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 295         }
 296         if (!ret)
 297                 goto unlock;
 298 rel_fh:
 299         v4l2_fh_release(file);
 300 unlock:
 301         mutex_unlock(&isp->video_lock);
 302         return ret;
 303 }
 304
 305 static int isp_video_release(struct file *file)
 306 {
 307         struct fimc_isp *isp = video_drvdata(file);
 308         struct fimc_is_video *ivc = &isp->video_capture;
 309         struct media_entity *entity = &ivc->ve.vdev.entity;
 310         struct media_device *mdev = entity->graph_obj.mdev;
 311
 312         mutex_lock(&isp->video_lock);
 313
 314         if (v4l2_fh_is_singular_file(file) && ivc->streaming) {
 315                 media_entity_pipeline_stop(entity);
 316                 ivc->streaming = 0;
 317         }
 318
 319         vb2_fop_release(file);
 320
 321         if (v4l2_fh_is_singular_file(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, V4L2_CAP_STREAMING);
 353         return 0;
 354 }
 355
 356 static int isp_video_enum_fmt_mplane(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         strlcpy(f->description, fmt->name, sizeof(f->description));
 369         f->pixelformat = fmt->fourcc;
 370
 371         return 0;
 372 }
 373
 374 static int isp_video_g_fmt_mplane(struct file *file, void *fh,
 375                                         struct v4l2_format *f)
 376 {
 377         struct fimc_isp *isp = video_drvdata(file);
 378
 379         f->fmt.pix_mp = isp->video_capture.pixfmt;
 380         return 0;
 381 }
 382
 383 static void __isp_video_try_fmt(struct fimc_isp *isp,
 384                                 struct v4l2_pix_format_mplane *pixm,
 385                                 const struct fimc_fmt **fmt)
 386 {
 387         *fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
 388
 389         pixm->colorspace = V4L2_COLORSPACE_SRGB;
 390         pixm->field = V4L2_FIELD_NONE;
 391         pixm->num_planes = (*fmt)->memplanes;
 392         pixm->pixelformat = (*fmt)->fourcc;
 393         /*
 394          * TODO: double check with the docmentation these width/height
 395          * constraints are correct.
 396          */
 397         v4l_bound_align_image(&pixm->width, FIMC_ISP_SOURCE_WIDTH_MIN,
 398                               FIMC_ISP_SOURCE_WIDTH_MAX, 3,
 399                               &pixm->height, FIMC_ISP_SOURCE_HEIGHT_MIN,
 400                               FIMC_ISP_SOURCE_HEIGHT_MAX, 0, 0);
 401 }
 402
 403 static int isp_video_try_fmt_mplane(struct file *file, void *fh,
 404                                         struct v4l2_format *f)
 405 {
 406         struct fimc_isp *isp = video_drvdata(file);
 407
 408         __isp_video_try_fmt(isp, &f->fmt.pix_mp, NULL);
 409         return 0;
 410 }
 411
 412 static int isp_video_s_fmt_mplane(struct file *file, void *priv,
 413                                         struct v4l2_format *f)
 414 {
 415         struct fimc_isp *isp = video_drvdata(file);
 416         struct fimc_is *is = fimc_isp_to_is(isp);
 417         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 418         const struct fimc_fmt *ifmt = NULL;
 419         struct param_dma_output *dma = __get_isp_dma2(is);
 420
 421         __isp_video_try_fmt(isp, pixm, &ifmt);
 422
 423         if (WARN_ON(ifmt == NULL))
 424                 return -EINVAL;
 425
 426         dma->format = DMA_OUTPUT_FORMAT_BAYER;
 427         dma->order = DMA_OUTPUT_ORDER_GB_BG;
 428         dma->plane = ifmt->memplanes;
 429         dma->bitwidth = ifmt->depth[0];
 430         dma->width = pixm->width;
 431         dma->height = pixm->height;
 432
 433         fimc_is_mem_barrier();
 434
 435         isp->video_capture.format = ifmt;
 436         isp->video_capture.pixfmt = *pixm;
 437
 438         return 0;
 439 }
 440
 441 /*
 442  * Check for source/sink format differences at each link.
 443  * Return 0 if the formats match or -EPIPE otherwise.
 444  */
 445 static int isp_video_pipeline_validate(struct fimc_isp *isp)
 446 {
 447         struct v4l2_subdev *sd = &isp->subdev;
 448         struct v4l2_subdev_format sink_fmt, src_fmt;
 449         struct media_pad *pad;
 450         int ret;
 451
 452         while (1) {
 453                 /* Retrieve format at the sink pad */
 454                 pad = &sd->entity.pads[0];
 455                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 456                         break;
 457                 sink_fmt.pad = pad->index;
 458                 sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 459                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
 460                 if (ret < 0 && ret != -ENOIOCTLCMD)
 461                         return -EPIPE;
 462
 463                 /* Retrieve format at the source pad */
 464                 pad = media_entity_remote_pad(pad);
 465                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 466                         break;
 467
 468                 sd = media_entity_to_v4l2_subdev(pad->entity);
 469                 src_fmt.pad = pad->index;
 470                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 471                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 472                 if (ret < 0 && ret != -ENOIOCTLCMD)
 473                         return -EPIPE;
 474
 475                 if (src_fmt.format.width != sink_fmt.format.width ||
 476                     src_fmt.format.height != sink_fmt.format.height ||
 477                     src_fmt.format.code != sink_fmt.format.code)
 478                         return -EPIPE;
 479         }
 480
 481         return 0;
 482 }
 483
 484 static int isp_video_streamon(struct file *file, void *priv,
 485                                       enum v4l2_buf_type type)
 486 {
 487         struct fimc_isp *isp = video_drvdata(file);
 488         struct exynos_video_entity *ve = &isp->video_capture.ve;
 489         struct media_entity *me = &ve->vdev.entity;
 490         int ret;
 491
 492         ret = media_entity_pipeline_start(me, &ve->pipe->mp);
 493         if (ret < 0)
 494                 return ret;
 495
 496         ret = isp_video_pipeline_validate(isp);
 497         if (ret < 0)
 498                 goto p_stop;
 499
 500         ret = vb2_ioctl_streamon(file, priv, type);
 501         if (ret < 0)
 502                 goto p_stop;
 503
 504         isp->video_capture.streaming = 1;
 505         return 0;
 506 p_stop:
 507         media_entity_pipeline_stop(me);
 508         return ret;
 509 }
 510
 511 static int isp_video_streamoff(struct file *file, void *priv,
 512                                         enum v4l2_buf_type type)
 513 {
 514         struct fimc_isp *isp = video_drvdata(file);
 515         struct fimc_is_video *video = &isp->video_capture;
 516         int ret;
 517
 518         ret = vb2_ioctl_streamoff(file, priv, type);
 519         if (ret < 0)
 520                 return ret;
 521
 522         media_entity_pipeline_stop(&video->ve.vdev.entity);
 523         video->streaming = 0;
 524         return 0;
 525 }
 526
 527 static int isp_video_reqbufs(struct file *file, void *priv,
 528                                 struct v4l2_requestbuffers *rb)
 529 {
 530         struct fimc_isp *isp = video_drvdata(file);
 531         int ret;
 532
 533         ret = vb2_ioctl_reqbufs(file, priv, rb);
 534         if (ret < 0)
 535                 return ret;
 536
 537         if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) {
 538                 rb->count = 0;
 539                 vb2_ioctl_reqbufs(file, priv, rb);
 540                 ret = -ENOMEM;
 541         }
 542
 543         isp->video_capture.reqbufs_count = rb->count;
 544         return ret;
 545 }
 546
 547 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
 548         .vidioc_querycap                = isp_video_querycap,
 549         .vidioc_enum_fmt_vid_cap_mplane = isp_video_enum_fmt_mplane,
 550         .vidioc_try_fmt_vid_cap_mplane  = isp_video_try_fmt_mplane,
 551         .vidioc_s_fmt_vid_cap_mplane    = isp_video_s_fmt_mplane,
 552         .vidioc_g_fmt_vid_cap_mplane    = isp_video_g_fmt_mplane,
 553         .vidioc_reqbufs                 = isp_video_reqbufs,
 554         .vidioc_querybuf                = vb2_ioctl_querybuf,
 555         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 556         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 557         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 558         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 559         .vidioc_streamon                = isp_video_streamon,
 560         .vidioc_streamoff               = isp_video_streamoff,
 561 };
 562
 563 int fimc_isp_video_device_register(struct fimc_isp *isp,
 564                                    struct v4l2_device *v4l2_dev,
 565                                    enum v4l2_buf_type type)
 566 {
 567         struct vb2_queue *q = &isp->video_capture.vb_queue;
 568         struct fimc_is_video *iv;
 569         struct video_device *vdev;
 570         int ret;
 571
 572         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 573                 iv = &isp->video_capture;
 574         else
 575                 return -ENOSYS;
 576
 577         mutex_init(&isp->video_lock);
 578         INIT_LIST_HEAD(&iv->pending_buf_q);
 579         INIT_LIST_HEAD(&iv->active_buf_q);
 580         iv->format = fimc_isp_find_format(NULL, NULL, 0);
 581         iv->pixfmt.width = IS_DEFAULT_WIDTH;
 582         iv->pixfmt.height = IS_DEFAULT_HEIGHT;
 583         iv->pixfmt.pixelformat = iv->format->fourcc;
 584         iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB;
 585         iv->reqbufs_count = 0;
 586
 587         memset(q, 0, sizeof(*q));
 588         q->type = type;
 589         q->io_modes = VB2_MMAP | VB2_USERPTR;
 590         q->ops = &isp_video_capture_qops;
 591         q->mem_ops = &vb2_dma_contig_memops;
 592         q->buf_struct_size = sizeof(struct isp_video_buf);
 593         q->drv_priv = isp;
 594         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 595         q->lock = &isp->video_lock;
 596         q->dev = &isp->pdev->dev;
 597
 598         ret = vb2_queue_init(q);
 599         if (ret < 0)
 600                 return ret;
 601
 602         vdev = &iv->ve.vdev;
 603         memset(vdev, 0, sizeof(*vdev));
 604         snprintf(vdev->name, sizeof(vdev->name), "fimc-is-isp.%s",
 605                         type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ?
 606                         "capture" : "output");
 607         vdev->queue = q;
 608         vdev->fops = &isp_video_fops;
 609         vdev->ioctl_ops = &isp_video_ioctl_ops;
 610         vdev->v4l2_dev = v4l2_dev;
 611         vdev->minor = -1;
 612         vdev->release = video_device_release_empty;
 613         vdev->lock = &isp->video_lock;
 614
 615         iv->pad.flags = MEDIA_PAD_FL_SINK;
 616         ret = media_entity_pads_init(&vdev->entity, 1, &iv->pad);
 617         if (ret < 0)
 618                 return ret;
 619
 620         video_set_drvdata(vdev, isp);
 621
 622         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
 623         if (ret < 0) {
 624                 media_entity_cleanup(&vdev->entity);
 625                 return ret;
 626         }
 627
 628         v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
 629                   vdev->name, video_device_node_name(vdev));
 630
 631         return 0;
 632 }
 633
 634 void fimc_isp_video_device_unregister(struct fimc_isp *isp,
 635                                       enum v4l2_buf_type type)
 636 {
 637         struct exynos_video_entity *ve;
 638
 639         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 640                 ve = &isp->video_capture.ve;
 641         else
 642                 return;
 643
 644         mutex_lock(&isp->video_lock);
 645
 646         if (video_is_registered(&ve->vdev)) {
 647                 video_unregister_device(&ve->vdev);
 648                 media_entity_cleanup(&ve->vdev.entity);
 649                 ve->pipe = NULL;
 650         }
 651
 652         mutex_unlock(&isp->video_lock);
 653 }