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[], void *allocators[])
  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                         allocators[i] = isp->alloc_ctx;
  64                 }
  65                 return 0;
  66         }
  67
  68         *num_planes = fmt->memplanes;
  69
  70         for (i = 0; i < fmt->memplanes; i++) {
  71                 sizes[i] = (wh * fmt->depth[i]) / 8;
  72                 allocators[i] = isp->alloc_ctx;
  73         }
  74
  75         return 0;
  76 }
  77
  78 static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is)
  79 {
  80         return &__get_curr_is_config(is)->isp.dma2_output;
  81 }
  82
  83 static int isp_video_capture_start_streaming(struct vb2_queue *q,
  84                                                 unsigned int count)
  85 {
  86         struct fimc_isp *isp = vb2_get_drv_priv(q);
  87         struct fimc_is *is = fimc_isp_to_is(isp);
  88         struct param_dma_output *dma = __get_isp_dma2(is);
  89         struct fimc_is_video *video = &isp->video_capture;
  90         int ret;
  91
  92         if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) ||
  93             test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
  94                 return 0;
  95
  96
  97         dma->cmd = DMA_OUTPUT_COMMAND_ENABLE;
  98         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE;
  99         dma->buffer_address = is->is_dma_p_region +
 100                                 DMA2_OUTPUT_ADDR_ARRAY_OFFS;
 101         dma->buffer_number = video->reqbufs_count;
 102         dma->dma_out_mask = video->buf_mask;
 103
 104         isp_dbg(2, &video->ve.vdev,
 105                 "buf_count: %d, planes: %d, dma addr table: %#x\n",
 106                 video->buf_count, video->format->memplanes,
 107                 dma->buffer_address);
 108
 109         fimc_is_mem_barrier();
 110
 111         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 112         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 113
 114         ret = fimc_is_itf_s_param(is, false);
 115         if (ret < 0)
 116                 return ret;
 117
 118         ret = fimc_pipeline_call(&video->ve, set_stream, 1);
 119         if (ret < 0)
 120                 return ret;
 121
 122         set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 123         return ret;
 124 }
 125
 126 static void isp_video_capture_stop_streaming(struct vb2_queue *q)
 127 {
 128         struct fimc_isp *isp = vb2_get_drv_priv(q);
 129         struct fimc_is *is = fimc_isp_to_is(isp);
 130         struct param_dma_output *dma = __get_isp_dma2(is);
 131         int ret;
 132
 133         ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0);
 134         if (ret < 0)
 135                 return;
 136
 137         dma->cmd = DMA_OUTPUT_COMMAND_DISABLE;
 138         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE;
 139         dma->buffer_number = 0;
 140         dma->buffer_address = 0;
 141         dma->dma_out_mask = 0;
 142
 143         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 144         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 145
 146         ret = fimc_is_itf_s_param(is, false);
 147         if (ret < 0)
 148                 dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__);
 149
 150         fimc_is_hw_set_isp_buf_mask(is, 0);
 151
 152         clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 153         clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 154
 155         isp->video_capture.buf_count = 0;
 156 }
 157
 158 static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb)
 159 {
 160         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 161         struct fimc_is_video *video = &isp->video_capture;
 162         int i;
 163
 164         if (video->format == NULL)
 165                 return -EINVAL;
 166
 167         for (i = 0; i < video->format->memplanes; i++) {
 168                 unsigned long size = video->pixfmt.plane_fmt[i].sizeimage;
 169
 170                 if (vb2_plane_size(vb, i) < size) {
 171                         v4l2_err(&video->ve.vdev,
 172                                  "User buffer too small (%ld < %ld)\n",
 173                                  vb2_plane_size(vb, i), size);
 174                         return -EINVAL;
 175                 }
 176                 vb2_set_plane_payload(vb, i, size);
 177         }
 178
 179         /* Check if we get one of the already known buffers. */
 180         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 181                 dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 182                 int i;
 183
 184                 for (i = 0; i < video->buf_count; i++)
 185                         if (video->buffers[i]->dma_addr[0] == dma_addr)
 186                                 return 0;
 187                 return -ENXIO;
 188         }
 189
 190         return 0;
 191 }
 192
 193 static void isp_video_capture_buffer_queue(struct vb2_buffer *vb)
 194 {
 195         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 196         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 197         struct fimc_is_video *video = &isp->video_capture;
 198         struct fimc_is *is = fimc_isp_to_is(isp);
 199         struct isp_video_buf *ivb = to_isp_video_buf(vbuf);
 200         unsigned long flags;
 201         unsigned int i;
 202
 203         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 204                 spin_lock_irqsave(&is->slock, flags);
 205                 video->buf_mask |= BIT(ivb->index);
 206                 spin_unlock_irqrestore(&is->slock, flags);
 207         } else {
 208                 unsigned int num_planes = video->format->memplanes;
 209
 210                 ivb->index = video->buf_count;
 211                 video->buffers[ivb->index] = ivb;
 212
 213                 for (i = 0; i < num_planes; i++) {
 214                         int buf_index = ivb->index * num_planes + i;
 215
 216                         ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 217                         is->is_p_region->shared[32 + buf_index] =
 218                                                         ivb->dma_addr[i];
 219
 220                         isp_dbg(2, &video->ve.vdev,
 221                                 "dma_buf %d (%d/%d/%d) addr: %pad\n",
 222                                 buf_index, ivb->index, i, vb->index,
 223                                 &ivb->dma_addr[i]);
 224                 }
 225
 226                 if (++video->buf_count < video->reqbufs_count)
 227                         return;
 228
 229                 video->buf_mask = (1UL << video->buf_count) - 1;
 230                 set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 231         }
 232
 233         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
 234                 isp_video_capture_start_streaming(vb->vb2_queue, 0);
 235 }
 236
 237 /*
 238  * FIMC-IS ISP input and output DMA interface interrupt handler.
 239  * Locking: called with is->slock spinlock held.
 240  */
 241 void fimc_isp_video_irq_handler(struct fimc_is *is)
 242 {
 243         struct fimc_is_video *video = &is->isp.video_capture;
 244         struct vb2_v4l2_buffer *vbuf;
 245         int buf_index;
 246
 247         /* TODO: Ensure the DMA is really stopped in stop_streaming callback */
 248         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state))
 249                 return;
 250
 251         buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count;
 252         vbuf = &video->buffers[buf_index]->vb;
 253
 254         vbuf->vb2_buf.timestamp = ktime_get_ns();
 255         vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 256
 257         video->buf_mask &= ~BIT(buf_index);
 258         fimc_is_hw_set_isp_buf_mask(is, video->buf_mask);
 259 }
 260
 261 static const struct vb2_ops isp_video_capture_qops = {
 262         .queue_setup     = isp_video_capture_queue_setup,
 263         .buf_prepare     = isp_video_capture_buffer_prepare,
 264         .buf_queue       = isp_video_capture_buffer_queue,
 265         .wait_prepare    = vb2_ops_wait_prepare,
 266         .wait_finish     = vb2_ops_wait_finish,
 267         .start_streaming = isp_video_capture_start_streaming,
 268         .stop_streaming  = isp_video_capture_stop_streaming,
 269 };
 270
 271 static int isp_video_open(struct file *file)
 272 {
 273         struct fimc_isp *isp = video_drvdata(file);
 274         struct exynos_video_entity *ve = &isp->video_capture.ve;
 275         struct media_entity *me = &ve->vdev.entity;
 276         int ret;
 277
 278         if (mutex_lock_interruptible(&isp->video_lock))
 279                 return -ERESTARTSYS;
 280
 281         ret = v4l2_fh_open(file);
 282         if (ret < 0)
 283                 goto unlock;
 284
 285         ret = pm_runtime_get_sync(&isp->pdev->dev);
 286         if (ret < 0)
 287                 goto rel_fh;
 288
 289         if (v4l2_fh_is_singular_file(file)) {
 290                 mutex_lock(&me->graph_obj.mdev->graph_mutex);
 291
 292                 ret = fimc_pipeline_call(ve, open, me, true);
 293
 294                 /* Mark the video pipeline as in use. */
 295                 if (ret == 0)
 296                         me->use_count++;
 297
 298                 mutex_unlock(&me->graph_obj.mdev->graph_mutex);
 299         }
 300         if (!ret)
 301                 goto unlock;
 302 rel_fh:
 303         v4l2_fh_release(file);
 304 unlock:
 305         mutex_unlock(&isp->video_lock);
 306         return ret;
 307 }
 308
 309 static int isp_video_release(struct file *file)
 310 {
 311         struct fimc_isp *isp = video_drvdata(file);
 312         struct fimc_is_video *ivc = &isp->video_capture;
 313         struct media_entity *entity = &ivc->ve.vdev.entity;
 314         struct media_device *mdev = entity->graph_obj.mdev;
 315
 316         mutex_lock(&isp->video_lock);
 317
 318         if (v4l2_fh_is_singular_file(file) && ivc->streaming) {
 319                 media_entity_pipeline_stop(entity);
 320                 ivc->streaming = 0;
 321         }
 322
 323         vb2_fop_release(file);
 324
 325         if (v4l2_fh_is_singular_file(file)) {
 326                 fimc_pipeline_call(&ivc->ve, close);
 327
 328                 mutex_lock(&mdev->graph_mutex);
 329                 entity->use_count--;
 330                 mutex_unlock(&mdev->graph_mutex);
 331         }
 332
 333         pm_runtime_put(&isp->pdev->dev);
 334         mutex_unlock(&isp->video_lock);
 335
 336         return 0;
 337 }
 338
 339 static const struct v4l2_file_operations isp_video_fops = {
 340         .owner          = THIS_MODULE,
 341         .open           = isp_video_open,
 342         .release        = isp_video_release,
 343         .poll           = vb2_fop_poll,
 344         .unlocked_ioctl = video_ioctl2,
 345         .mmap           = vb2_fop_mmap,
 346 };
 347
 348 /*
 349  * Video node ioctl operations
 350  */
 351 static int isp_video_querycap(struct file *file, void *priv,
 352                                         struct v4l2_capability *cap)
 353 {
 354         struct fimc_isp *isp = video_drvdata(file);
 355
 356         __fimc_vidioc_querycap(&isp->pdev->dev, cap, V4L2_CAP_STREAMING);
 357         return 0;
 358 }
 359
 360 static int isp_video_enum_fmt_mplane(struct file *file, void *priv,
 361                                         struct v4l2_fmtdesc *f)
 362 {
 363         const struct fimc_fmt *fmt;
 364
 365         if (f->index >= FIMC_ISP_NUM_FORMATS)
 366                 return -EINVAL;
 367
 368         fmt = fimc_isp_find_format(NULL, NULL, f->index);
 369         if (WARN_ON(fmt == NULL))
 370                 return -EINVAL;
 371
 372         strlcpy(f->description, fmt->name, sizeof(f->description));
 373         f->pixelformat = fmt->fourcc;
 374
 375         return 0;
 376 }
 377
 378 static int isp_video_g_fmt_mplane(struct file *file, void *fh,
 379                                         struct v4l2_format *f)
 380 {
 381         struct fimc_isp *isp = video_drvdata(file);
 382
 383         f->fmt.pix_mp = isp->video_capture.pixfmt;
 384         return 0;
 385 }
 386
 387 static void __isp_video_try_fmt(struct fimc_isp *isp,
 388                                 struct v4l2_pix_format_mplane *pixm,
 389                                 const struct fimc_fmt **fmt)
 390 {
 391         *fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
 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 v4l2_subdev_format sink_fmt, src_fmt;
 453         struct media_pad *pad;
 454         int ret;
 455
 456         while (1) {
 457                 /* Retrieve format at the sink pad */
 458                 pad = &sd->entity.pads[0];
 459                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 460                         break;
 461                 sink_fmt.pad = pad->index;
 462                 sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 463                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
 464                 if (ret < 0 && ret != -ENOIOCTLCMD)
 465                         return -EPIPE;
 466
 467                 /* Retrieve format at the source pad */
 468                 pad = media_entity_remote_pad(pad);
 469                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
 470                         break;
 471
 472                 sd = media_entity_to_v4l2_subdev(pad->entity);
 473                 src_fmt.pad = pad->index;
 474                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 475                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
 476                 if (ret < 0 && ret != -ENOIOCTLCMD)
 477                         return -EPIPE;
 478
 479                 if (src_fmt.format.width != sink_fmt.format.width ||
 480                     src_fmt.format.height != sink_fmt.format.height ||
 481                     src_fmt.format.code != sink_fmt.format.code)
 482                         return -EPIPE;
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int isp_video_streamon(struct file *file, void *priv,
 489                                       enum v4l2_buf_type type)
 490 {
 491         struct fimc_isp *isp = video_drvdata(file);
 492         struct exynos_video_entity *ve = &isp->video_capture.ve;
 493         struct media_entity *me = &ve->vdev.entity;
 494         int ret;
 495
 496         ret = media_entity_pipeline_start(me, &ve->pipe->mp);
 497         if (ret < 0)
 498                 return ret;
 499
 500         ret = isp_video_pipeline_validate(isp);
 501         if (ret < 0)
 502                 goto p_stop;
 503
 504         ret = vb2_ioctl_streamon(file, priv, type);
 505         if (ret < 0)
 506                 goto p_stop;
 507
 508         isp->video_capture.streaming = 1;
 509         return 0;
 510 p_stop:
 511         media_entity_pipeline_stop(me);
 512         return ret;
 513 }
 514
 515 static int isp_video_streamoff(struct file *file, void *priv,
 516                                         enum v4l2_buf_type type)
 517 {
 518         struct fimc_isp *isp = video_drvdata(file);
 519         struct fimc_is_video *video = &isp->video_capture;
 520         int ret;
 521
 522         ret = vb2_ioctl_streamoff(file, priv, type);
 523         if (ret < 0)
 524                 return ret;
 525
 526         media_entity_pipeline_stop(&video->ve.vdev.entity);
 527         video->streaming = 0;
 528         return 0;
 529 }
 530
 531 static int isp_video_reqbufs(struct file *file, void *priv,
 532                                 struct v4l2_requestbuffers *rb)
 533 {
 534         struct fimc_isp *isp = video_drvdata(file);
 535         int ret;
 536
 537         ret = vb2_ioctl_reqbufs(file, priv, rb);
 538         if (ret < 0)
 539                 return ret;
 540
 541         if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) {
 542                 rb->count = 0;
 543                 vb2_ioctl_reqbufs(file, priv, rb);
 544                 ret = -ENOMEM;
 545         }
 546
 547         isp->video_capture.reqbufs_count = rb->count;
 548         return ret;
 549 }
 550
 551 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
 552         .vidioc_querycap                = isp_video_querycap,
 553         .vidioc_enum_fmt_vid_cap_mplane = isp_video_enum_fmt_mplane,
 554         .vidioc_try_fmt_vid_cap_mplane  = isp_video_try_fmt_mplane,
 555         .vidioc_s_fmt_vid_cap_mplane    = isp_video_s_fmt_mplane,
 556         .vidioc_g_fmt_vid_cap_mplane    = isp_video_g_fmt_mplane,
 557         .vidioc_reqbufs                 = isp_video_reqbufs,
 558         .vidioc_querybuf                = vb2_ioctl_querybuf,
 559         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 560         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 561         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 562         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 563         .vidioc_streamon                = isp_video_streamon,
 564         .vidioc_streamoff               = isp_video_streamoff,
 565 };
 566
 567 int fimc_isp_video_device_register(struct fimc_isp *isp,
 568                                    struct v4l2_device *v4l2_dev,
 569                                    enum v4l2_buf_type type)
 570 {
 571         struct vb2_queue *q = &isp->video_capture.vb_queue;
 572         struct fimc_is_video *iv;
 573         struct video_device *vdev;
 574         int ret;
 575
 576         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 577                 iv = &isp->video_capture;
 578         else
 579                 return -ENOSYS;
 580
 581         mutex_init(&isp->video_lock);
 582         INIT_LIST_HEAD(&iv->pending_buf_q);
 583         INIT_LIST_HEAD(&iv->active_buf_q);
 584         iv->format = fimc_isp_find_format(NULL, NULL, 0);
 585         iv->pixfmt.width = IS_DEFAULT_WIDTH;
 586         iv->pixfmt.height = IS_DEFAULT_HEIGHT;
 587         iv->pixfmt.pixelformat = iv->format->fourcc;
 588         iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB;
 589         iv->reqbufs_count = 0;
 590
 591         memset(q, 0, sizeof(*q));
 592         q->type = type;
 593         q->io_modes = VB2_MMAP | VB2_USERPTR;
 594         q->ops = &isp_video_capture_qops;
 595         q->mem_ops = &vb2_dma_contig_memops;
 596         q->buf_struct_size = sizeof(struct isp_video_buf);
 597         q->drv_priv = isp;
 598         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 599         q->lock = &isp->video_lock;
 600
 601         ret = vb2_queue_init(q);
 602         if (ret < 0)
 603                 return ret;
 604
 605         vdev = &iv->ve.vdev;
 606         memset(vdev, 0, sizeof(*vdev));
 607         snprintf(vdev->name, sizeof(vdev->name), "fimc-is-isp.%s",
 608                         type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ?
 609                         "capture" : "output");
 610         vdev->queue = q;
 611         vdev->fops = &isp_video_fops;
 612         vdev->ioctl_ops = &isp_video_ioctl_ops;
 613         vdev->v4l2_dev = v4l2_dev;
 614         vdev->minor = -1;
 615         vdev->release = video_device_release_empty;
 616         vdev->lock = &isp->video_lock;
 617
 618         iv->pad.flags = MEDIA_PAD_FL_SINK;
 619         ret = media_entity_pads_init(&vdev->entity, 1, &iv->pad);
 620         if (ret < 0)
 621                 return ret;
 622
 623         video_set_drvdata(vdev, isp);
 624
 625         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
 626         if (ret < 0) {
 627                 media_entity_cleanup(&vdev->entity);
 628                 return ret;
 629         }
 630
 631         v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
 632                   vdev->name, video_device_node_name(vdev));
 633
 634         return 0;
 635 }
 636
 637 void fimc_isp_video_device_unregister(struct fimc_isp *isp,
 638                                       enum v4l2_buf_type type)
 639 {
 640         struct exynos_video_entity *ve;
 641
 642         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 643                 ve = &isp->video_capture.ve;
 644         else
 645                 return;
 646
 647         mutex_lock(&isp->video_lock);
 648
 649         if (video_is_registered(&ve->vdev)) {
 650                 video_unregister_device(&ve->vdev);
 651                 media_entity_cleanup(&ve->vdev.entity);
 652                 ve->pipe = NULL;
 653         }
 654
 655         mutex_unlock(&isp->video_lock);
 656 }