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-core.h>
  32 #include <media/videobuf2-dma-contig.h>
  33 #include <media/s5p_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                         const struct v4l2_format *pfmt,
  43                         unsigned int *num_buffers, unsigned int *num_planes,
  44                         unsigned int sizes[], void *allocators[])
  45 {
  46         struct fimc_isp *isp = vb2_get_drv_priv(vq);
  47         struct v4l2_pix_format_mplane *vid_fmt = &isp->video_capture.pixfmt;
  48         const struct v4l2_pix_format_mplane *pixm = NULL;
  49         const struct fimc_fmt *fmt;
  50         unsigned int wh, i;
  51
  52         if (pfmt) {
  53                 pixm = &pfmt->fmt.pix_mp;
  54                 fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, -1);
  55                 wh = pixm->width * pixm->height;
  56         } else {
  57                 fmt = isp->video_capture.format;
  58                 wh = vid_fmt->width * vid_fmt->height;
  59         }
  60
  61         if (fmt == NULL)
  62                 return -EINVAL;
  63
  64         *num_buffers = clamp_t(u32, *num_buffers, FIMC_ISP_REQ_BUFS_MIN,
  65                                                 FIMC_ISP_REQ_BUFS_MAX);
  66         *num_planes = fmt->memplanes;
  67
  68         for (i = 0; i < fmt->memplanes; i++) {
  69                 unsigned int size = (wh * fmt->depth[i]) / 8;
  70                 if (pixm)
  71                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
  72                 else
  73                         sizes[i] = size;
  74                 allocators[i] = isp->alloc_ctx;
  75         }
  76
  77         return 0;
  78 }
  79
  80 static inline struct param_dma_output *__get_isp_dma2(struct fimc_is *is)
  81 {
  82         return &__get_curr_is_config(is)->isp.dma2_output;
  83 }
  84
  85 static int isp_video_capture_start_streaming(struct vb2_queue *q,
  86                                                 unsigned int count)
  87 {
  88         struct fimc_isp *isp = vb2_get_drv_priv(q);
  89         struct fimc_is *is = fimc_isp_to_is(isp);
  90         struct param_dma_output *dma = __get_isp_dma2(is);
  91         struct fimc_is_video *video = &isp->video_capture;
  92         int ret;
  93
  94         if (!test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state) ||
  95             test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
  96                 return 0;
  97
  98
  99         dma->cmd = DMA_OUTPUT_COMMAND_ENABLE;
 100         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_ENABLE;
 101         dma->buffer_address = is->is_dma_p_region +
 102                                 DMA2_OUTPUT_ADDR_ARRAY_OFFS;
 103         dma->buffer_number = video->reqbufs_count;
 104         dma->dma_out_mask = video->buf_mask;
 105
 106         isp_dbg(2, &video->ve.vdev,
 107                 "buf_count: %d, planes: %d, dma addr table: %#x\n",
 108                 video->buf_count, video->format->memplanes,
 109                 dma->buffer_address);
 110
 111         fimc_is_mem_barrier();
 112
 113         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 114         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 115
 116         ret = fimc_is_itf_s_param(is, false);
 117         if (ret < 0)
 118                 return ret;
 119
 120         ret = fimc_pipeline_call(&video->ve, set_stream, 1);
 121         if (ret < 0)
 122                 return ret;
 123
 124         set_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 125         return ret;
 126 }
 127
 128 static int isp_video_capture_stop_streaming(struct vb2_queue *q)
 129 {
 130         struct fimc_isp *isp = vb2_get_drv_priv(q);
 131         struct fimc_is *is = fimc_isp_to_is(isp);
 132         struct param_dma_output *dma = __get_isp_dma2(is);
 133         int ret;
 134
 135         ret = fimc_pipeline_call(&isp->video_capture.ve, set_stream, 0);
 136         if (ret < 0)
 137                 return ret;
 138
 139         dma->cmd = DMA_OUTPUT_COMMAND_DISABLE;
 140         dma->notify_dma_done = DMA_OUTPUT_NOTIFY_DMA_DONE_DISABLE;
 141         dma->buffer_number = 0;
 142         dma->buffer_address = 0;
 143         dma->dma_out_mask = 0;
 144
 145         fimc_is_set_param_bit(is, PARAM_ISP_DMA2_OUTPUT);
 146         __fimc_is_hw_update_param(is, PARAM_ISP_DMA2_OUTPUT);
 147
 148         ret = fimc_is_itf_s_param(is, false);
 149         if (ret < 0)
 150                 dev_warn(&is->pdev->dev, "%s: DMA stop failed\n", __func__);
 151
 152         fimc_is_hw_set_isp_buf_mask(is, 0);
 153
 154         clear_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 155         clear_bit(ST_ISP_VID_CAP_STREAMING, &isp->state);
 156
 157         isp->video_capture.buf_count = 0;
 158         return 0;
 159 }
 160
 161 static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb)
 162 {
 163         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 164         struct fimc_is_video *video = &isp->video_capture;
 165         int i;
 166
 167         if (video->format == NULL)
 168                 return -EINVAL;
 169
 170         for (i = 0; i < video->format->memplanes; i++) {
 171                 unsigned long size = video->pixfmt.plane_fmt[i].sizeimage;
 172
 173                 if (vb2_plane_size(vb, i) < size) {
 174                         v4l2_err(&video->ve.vdev,
 175                                  "User buffer too small (%ld < %ld)\n",
 176                                  vb2_plane_size(vb, i), size);
 177                         return -EINVAL;
 178                 }
 179                 vb2_set_plane_payload(vb, i, size);
 180         }
 181
 182         /* Check if we get one of the already known buffers. */
 183         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 184                 dma_addr_t dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 185                 int i;
 186
 187                 for (i = 0; i < video->buf_count; i++)
 188                         if (video->buffers[i]->dma_addr[0] == dma_addr)
 189                                 return 0;
 190                 return -ENXIO;
 191         }
 192
 193         return 0;
 194 }
 195
 196 static void isp_video_capture_buffer_queue(struct vb2_buffer *vb)
 197 {
 198         struct fimc_isp *isp = vb2_get_drv_priv(vb->vb2_queue);
 199         struct fimc_is_video *video = &isp->video_capture;
 200         struct fimc_is *is = fimc_isp_to_is(isp);
 201         struct isp_video_buf *ivb = to_isp_video_buf(vb);
 202         unsigned long flags;
 203         unsigned int i;
 204
 205         if (test_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state)) {
 206                 spin_lock_irqsave(&is->slock, flags);
 207                 video->buf_mask |= BIT(ivb->index);
 208                 spin_unlock_irqrestore(&is->slock, flags);
 209         } else {
 210                 unsigned int num_planes = video->format->memplanes;
 211
 212                 ivb->index = video->buf_count;
 213                 video->buffers[ivb->index] = ivb;
 214
 215                 for (i = 0; i < num_planes; i++) {
 216                         int buf_index = ivb->index * num_planes + i;
 217
 218                         ivb->dma_addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
 219                         is->is_p_region->shared[32 + buf_index] =
 220                                                         ivb->dma_addr[i];
 221
 222                         isp_dbg(2, &video->ve.vdev,
 223                                 "dma_buf %d (%d/%d/%d) addr: %#x\n",
 224                                 buf_index, ivb->index, i, vb->v4l2_buf.index,
 225                                 ivb->dma_addr[i]);
 226                 }
 227
 228                 if (++video->buf_count < video->reqbufs_count)
 229                         return;
 230
 231                 video->buf_mask = (1UL << video->buf_count) - 1;
 232                 set_bit(ST_ISP_VID_CAP_BUF_PREP, &isp->state);
 233         }
 234
 235         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &isp->state))
 236                 isp_video_capture_start_streaming(vb->vb2_queue, 0);
 237 }
 238
 239 /*
 240  * FIMC-IS ISP input and output DMA interface interrupt handler.
 241  * Locking: called with is->slock spinlock held.
 242  */
 243 void fimc_isp_video_irq_handler(struct fimc_is *is)
 244 {
 245         struct fimc_is_video *video = &is->isp.video_capture;
 246         struct vb2_buffer *vb;
 247         int buf_index;
 248
 249         /* TODO: Ensure the DMA is really stopped in stop_streaming callback */
 250         if (!test_bit(ST_ISP_VID_CAP_STREAMING, &is->isp.state))
 251                 return;
 252
 253         buf_index = (is->i2h_cmd.args[1] - 1) % video->buf_count;
 254         vb = &video->buffers[buf_index]->vb;
 255
 256         v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
 257         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 258
 259         video->buf_mask &= ~BIT(buf_index);
 260         fimc_is_hw_set_isp_buf_mask(is, video->buf_mask);
 261 }
 262
 263 static const struct vb2_ops isp_video_capture_qops = {
 264         .queue_setup     = isp_video_capture_queue_setup,
 265         .buf_prepare     = isp_video_capture_buffer_prepare,
 266         .buf_queue       = isp_video_capture_buffer_queue,
 267         .wait_prepare    = vb2_ops_wait_prepare,
 268         .wait_finish     = vb2_ops_wait_finish,
 269         .start_streaming = isp_video_capture_start_streaming,
 270         .stop_streaming  = isp_video_capture_stop_streaming,
 271 };
 272
 273 static int isp_video_open(struct file *file)
 274 {
 275         struct fimc_isp *isp = video_drvdata(file);
 276         struct exynos_video_entity *ve = &isp->video_capture.ve;
 277         struct media_entity *me = &ve->vdev.entity;
 278         int ret;
 279
 280         if (mutex_lock_interruptible(&isp->video_lock))
 281                 return -ERESTARTSYS;
 282
 283         ret = v4l2_fh_open(file);
 284         if (ret < 0)
 285                 goto unlock;
 286
 287         ret = pm_runtime_get_sync(&isp->pdev->dev);
 288         if (ret < 0)
 289                 goto rel_fh;
 290
 291         if (v4l2_fh_is_singular_file(file)) {
 292                 mutex_lock(&me->parent->graph_mutex);
 293
 294                 ret = fimc_pipeline_call(ve, open, me, true);
 295
 296                 /* Mark the video pipeline as in use. */
 297                 if (ret == 0)
 298                         me->use_count++;
 299
 300                 mutex_unlock(&me->parent->graph_mutex);
 301         }
 302         if (!ret)
 303                 goto unlock;
 304 rel_fh:
 305         v4l2_fh_release(file);
 306 unlock:
 307         mutex_unlock(&isp->video_lock);
 308         return ret;
 309 }
 310
 311 static int isp_video_release(struct file *file)
 312 {
 313         struct fimc_isp *isp = video_drvdata(file);
 314         struct fimc_is_video *ivc = &isp->video_capture;
 315         struct media_entity *entity = &ivc->ve.vdev.entity;
 316         struct media_device *mdev = entity->parent;
 317         int ret = 0;
 318
 319         mutex_lock(&isp->video_lock);
 320
 321         if (v4l2_fh_is_singular_file(file) && ivc->streaming) {
 322                 media_entity_pipeline_stop(entity);
 323                 ivc->streaming = 0;
 324         }
 325
 326         vb2_fop_release(file);
 327
 328         if (v4l2_fh_is_singular_file(file)) {
 329                 fimc_pipeline_call(&ivc->ve, close);
 330
 331                 mutex_lock(&mdev->graph_mutex);
 332                 entity->use_count--;
 333                 mutex_unlock(&mdev->graph_mutex);
 334         }
 335
 336         pm_runtime_put(&isp->pdev->dev);
 337         mutex_unlock(&isp->video_lock);
 338
 339         return ret;
 340 }
 341
 342 static const struct v4l2_file_operations isp_video_fops = {
 343         .owner          = THIS_MODULE,
 344         .open           = isp_video_open,
 345         .release        = isp_video_release,
 346         .poll           = vb2_fop_poll,
 347         .unlocked_ioctl = video_ioctl2,
 348         .mmap           = vb2_fop_mmap,
 349 };
 350
 351 /*
 352  * Video node ioctl operations
 353  */
 354 static int isp_video_querycap(struct file *file, void *priv,
 355                                         struct v4l2_capability *cap)
 356 {
 357         struct fimc_isp *isp = video_drvdata(file);
 358
 359         __fimc_vidioc_querycap(&isp->pdev->dev, cap, V4L2_CAP_STREAMING);
 360         return 0;
 361 }
 362
 363 static int isp_video_enum_fmt_mplane(struct file *file, void *priv,
 364                                         struct v4l2_fmtdesc *f)
 365 {
 366         const struct fimc_fmt *fmt;
 367
 368         if (f->index >= FIMC_ISP_NUM_FORMATS)
 369                 return -EINVAL;
 370
 371         fmt = fimc_isp_find_format(NULL, NULL, f->index);
 372         if (WARN_ON(fmt == NULL))
 373                 return -EINVAL;
 374
 375         strlcpy(f->description, fmt->name, sizeof(f->description));
 376         f->pixelformat = fmt->fourcc;
 377
 378         return 0;
 379 }
 380
 381 static int isp_video_g_fmt_mplane(struct file *file, void *fh,
 382                                         struct v4l2_format *f)
 383 {
 384         struct fimc_isp *isp = video_drvdata(file);
 385
 386         f->fmt.pix_mp = isp->video_capture.pixfmt;
 387         return 0;
 388 }
 389
 390 static void __isp_video_try_fmt(struct fimc_isp *isp,
 391                                 struct v4l2_pix_format_mplane *pixm,
 392                                 const struct fimc_fmt **fmt)
 393 {
 394         *fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
 395
 396         pixm->colorspace = V4L2_COLORSPACE_SRGB;
 397         pixm->field = V4L2_FIELD_NONE;
 398         pixm->num_planes = (*fmt)->memplanes;
 399         pixm->pixelformat = (*fmt)->fourcc;
 400         /*
 401          * TODO: double check with the docmentation these width/height
 402          * constraints are correct.
 403          */
 404         v4l_bound_align_image(&pixm->width, FIMC_ISP_SOURCE_WIDTH_MIN,
 405                               FIMC_ISP_SOURCE_WIDTH_MAX, 3,
 406                               &pixm->height, FIMC_ISP_SOURCE_HEIGHT_MIN,
 407                               FIMC_ISP_SOURCE_HEIGHT_MAX, 0, 0);
 408 }
 409
 410 static int isp_video_try_fmt_mplane(struct file *file, void *fh,
 411                                         struct v4l2_format *f)
 412 {
 413         struct fimc_isp *isp = video_drvdata(file);
 414
 415         __isp_video_try_fmt(isp, &f->fmt.pix_mp, NULL);
 416         return 0;
 417 }
 418
 419 static int isp_video_s_fmt_mplane(struct file *file, void *priv,
 420                                         struct v4l2_format *f)
 421 {
 422         struct fimc_isp *isp = video_drvdata(file);
 423         struct fimc_is *is = fimc_isp_to_is(isp);
 424         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
 425         const struct fimc_fmt *ifmt = NULL;
 426         struct param_dma_output *dma = __get_isp_dma2(is);
 427
 428         __isp_video_try_fmt(isp, pixm, &ifmt);
 429
 430         if (WARN_ON(ifmt == NULL))
 431                 return -EINVAL;
 432
 433         dma->format = DMA_OUTPUT_FORMAT_BAYER;
 434         dma->order = DMA_OUTPUT_ORDER_GB_BG;
 435         dma->plane = ifmt->memplanes;
 436         dma->bitwidth = ifmt->depth[0];
 437         dma->width = pixm->width;
 438         dma->height = pixm->height;
 439
 440         fimc_is_mem_barrier();
 441
 442         isp->video_capture.format = ifmt;
 443         isp->video_capture.pixfmt = *pixm;
 444
 445         return 0;
 446 }
 447
 448 /*
 449  * Check for source/sink format differences at each link.
 450  * Return 0 if the formats match or -EPIPE otherwise.
 451  */
 452 static int isp_video_pipeline_validate(struct fimc_isp *isp)
 453 {
 454         struct v4l2_subdev *sd = &isp->subdev;
 455         struct v4l2_subdev_format sink_fmt, src_fmt;
 456         struct media_pad *pad;
 457         int ret;
 458
 459         while (1) {
 460                 /* Retrieve format at the sink pad */
 461                 pad = &sd->entity.pads[0];
 462                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
 463                         break;
 464                 sink_fmt.pad = pad->index;
 465                 sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 466                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
 467                 if (ret < 0 && ret != -ENOIOCTLCMD)
 468                         return -EPIPE;
 469
 470                 /* Retrieve format at the source pad */
 471                 pad = media_entity_remote_pad(pad);
 472                 if (pad == NULL ||
 473                     media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
 474                         break;
 475
 476                 sd = media_entity_to_v4l2_subdev(pad->entity);
 477                 src_fmt.pad = pad->index;
 478                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 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         struct media_entity *me = &ve->vdev.entity;
 498         int ret;
 499
 500         ret = media_entity_pipeline_start(me, &ve->pipe->mp);
 501         if (ret < 0)
 502                 return ret;
 503
 504         ret = isp_video_pipeline_validate(isp);
 505         if (ret < 0)
 506                 goto p_stop;
 507
 508         ret = vb2_ioctl_streamon(file, priv, type);
 509         if (ret < 0)
 510                 goto p_stop;
 511
 512         isp->video_capture.streaming = 1;
 513         return 0;
 514 p_stop:
 515         media_entity_pipeline_stop(me);
 516         return ret;
 517 }
 518
 519 static int isp_video_streamoff(struct file *file, void *priv,
 520                                         enum v4l2_buf_type type)
 521 {
 522         struct fimc_isp *isp = video_drvdata(file);
 523         struct fimc_is_video *video = &isp->video_capture;
 524         int ret;
 525
 526         ret = vb2_ioctl_streamoff(file, priv, type);
 527         if (ret < 0)
 528                 return ret;
 529
 530         media_entity_pipeline_stop(&video->ve.vdev.entity);
 531         video->streaming = 0;
 532         return 0;
 533 }
 534
 535 static int isp_video_reqbufs(struct file *file, void *priv,
 536                                 struct v4l2_requestbuffers *rb)
 537 {
 538         struct fimc_isp *isp = video_drvdata(file);
 539         int ret;
 540
 541         ret = vb2_ioctl_reqbufs(file, priv, rb);
 542         if (ret < 0)
 543                 return ret;
 544
 545         if (rb->count && rb->count < FIMC_ISP_REQ_BUFS_MIN) {
 546                 rb->count = 0;
 547                 vb2_ioctl_reqbufs(file, priv, rb);
 548                 ret = -ENOMEM;
 549         }
 550
 551         isp->video_capture.reqbufs_count = rb->count;
 552         return ret;
 553 }
 554
 555 static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
 556         .vidioc_querycap                = isp_video_querycap,
 557         .vidioc_enum_fmt_vid_cap_mplane = isp_video_enum_fmt_mplane,
 558         .vidioc_try_fmt_vid_cap_mplane  = isp_video_try_fmt_mplane,
 559         .vidioc_s_fmt_vid_cap_mplane    = isp_video_s_fmt_mplane,
 560         .vidioc_g_fmt_vid_cap_mplane    = isp_video_g_fmt_mplane,
 561         .vidioc_reqbufs                 = isp_video_reqbufs,
 562         .vidioc_querybuf                = vb2_ioctl_querybuf,
 563         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
 564         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
 565         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 566         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 567         .vidioc_streamon                = isp_video_streamon,
 568         .vidioc_streamoff               = isp_video_streamoff,
 569 };
 570
 571 int fimc_isp_video_device_register(struct fimc_isp *isp,
 572                                    struct v4l2_device *v4l2_dev,
 573                                    enum v4l2_buf_type type)
 574 {
 575         struct vb2_queue *q = &isp->video_capture.vb_queue;
 576         struct fimc_is_video *iv;
 577         struct video_device *vdev;
 578         int ret;
 579
 580         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 581                 iv = &isp->video_capture;
 582         else
 583                 return -ENOSYS;
 584
 585         mutex_init(&isp->video_lock);
 586         INIT_LIST_HEAD(&iv->pending_buf_q);
 587         INIT_LIST_HEAD(&iv->active_buf_q);
 588         iv->format = fimc_isp_find_format(NULL, NULL, 0);
 589         iv->pixfmt.width = IS_DEFAULT_WIDTH;
 590         iv->pixfmt.height = IS_DEFAULT_HEIGHT;
 591         iv->pixfmt.pixelformat = iv->format->fourcc;
 592         iv->pixfmt.colorspace = V4L2_COLORSPACE_SRGB;
 593         iv->reqbufs_count = 0;
 594
 595         memset(q, 0, sizeof(*q));
 596         q->type = type;
 597         q->io_modes = VB2_MMAP | VB2_USERPTR;
 598         q->ops = &isp_video_capture_qops;
 599         q->mem_ops = &vb2_dma_contig_memops;
 600         q->buf_struct_size = sizeof(struct isp_video_buf);
 601         q->drv_priv = isp;
 602         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 603         q->lock = &isp->video_lock;
 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         snprintf(vdev->name, sizeof(vdev->name), "fimc-is-isp.%s",
 612                         type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ?
 613                         "capture" : "output");
 614         vdev->queue = q;
 615         vdev->fops = &isp_video_fops;
 616         vdev->ioctl_ops = &isp_video_ioctl_ops;
 617         vdev->v4l2_dev = v4l2_dev;
 618         vdev->minor = -1;
 619         vdev->release = video_device_release_empty;
 620         vdev->lock = &isp->video_lock;
 621
 622         iv->pad.flags = MEDIA_PAD_FL_SINK;
 623         ret = media_entity_init(&vdev->entity, 1, &iv->pad, 0);
 624         if (ret < 0)
 625                 return ret;
 626
 627         video_set_drvdata(vdev, isp);
 628
 629         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
 630         if (ret < 0) {
 631                 media_entity_cleanup(&vdev->entity);
 632                 return ret;
 633         }
 634
 635         v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
 636                   vdev->name, video_device_node_name(vdev));
 637
 638         return 0;
 639 }
 640
 641 void fimc_isp_video_device_unregister(struct fimc_isp *isp,
 642                                       enum v4l2_buf_type type)
 643 {
 644         struct exynos_video_entity *ve;
 645
 646         if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 647                 ve = &isp->video_capture.ve;
 648         else
 649                 return;
 650
 651         mutex_lock(&isp->video_lock);
 652
 653         if (video_is_registered(&ve->vdev)) {
 654                 video_unregister_device(&ve->vdev);
 655                 media_entity_cleanup(&ve->vdev.entity);
 656                 ve->pipe = NULL;
 657         }
 658
 659         mutex_unlock(&isp->video_lock);
 660 }