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 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 media_pipeline_stop(entity); 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 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_pad_remote_pad_first(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_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_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_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 = isp_video_enum_fmt, 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 q->dev = &isp->pdev->dev; 601 602 ret = vb2_queue_init(q); 603 if (ret < 0) 604 return ret; 605 606 vdev = &iv->ve.vdev; 607 memset(vdev, 0, sizeof(*vdev)); 608 strscpy(vdev->name, "fimc-is-isp.capture", sizeof(vdev->name)); 609 vdev->queue = q; 610 vdev->fops = &isp_video_fops; 611 vdev->ioctl_ops = &isp_video_ioctl_ops; 612 vdev->v4l2_dev = v4l2_dev; 613 vdev->minor = -1; 614 vdev->release = video_device_release_empty; 615 vdev->lock = &isp->video_lock; 616 vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE; 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_VIDEO, -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 } 657