1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Video Capture Subdev for Freescale i.MX5/6 SOC 4 * 5 * Copyright (c) 2012-2016 Mentor Graphics Inc. 6 */ 7 #include <linux/delay.h> 8 #include <linux/fs.h> 9 #include <linux/module.h> 10 #include <linux/of_platform.h> 11 #include <linux/pinctrl/consumer.h> 12 #include <linux/platform_device.h> 13 #include <linux/sched.h> 14 #include <linux/slab.h> 15 #include <linux/spinlock.h> 16 #include <linux/timer.h> 17 #include <media/v4l2-ctrls.h> 18 #include <media/v4l2-device.h> 19 #include <media/v4l2-event.h> 20 #include <media/v4l2-fwnode.h> 21 #include <media/v4l2-ioctl.h> 22 #include <media/v4l2-mc.h> 23 #include <media/v4l2-subdev.h> 24 #include <media/videobuf2-dma-contig.h> 25 #include <video/imx-ipu-v3.h> 26 #include <media/imx.h> 27 #include "imx-media.h" 28 29 #define IMX_CAPTURE_NAME "imx-capture" 30 31 struct capture_priv { 32 struct imx_media_dev *md; /* Media device */ 33 struct device *dev; /* Physical device */ 34 35 struct imx_media_video_dev vdev; /* Video device */ 36 struct media_pad vdev_pad; /* Video device pad */ 37 38 struct v4l2_subdev *src_sd; /* Source subdev */ 39 int src_sd_pad; /* Source subdev pad */ 40 41 struct mutex mutex; /* Protect vdev operations */ 42 43 struct vb2_queue q; /* The videobuf2 queue */ 44 struct list_head ready_q; /* List of queued buffers */ 45 spinlock_t q_lock; /* Protect ready_q */ 46 47 struct v4l2_ctrl_handler ctrl_hdlr; /* Controls inherited from subdevs */ 48 49 bool legacy_api; /* Use the legacy (pre-MC) API */ 50 }; 51 52 #define to_capture_priv(v) container_of(v, struct capture_priv, vdev) 53 54 /* In bytes, per queue */ 55 #define VID_MEM_LIMIT SZ_64M 56 57 /* ----------------------------------------------------------------------------- 58 * MC-Centric Video IOCTLs 59 */ 60 61 static const struct imx_media_pixfmt *capture_find_format(u32 code, u32 fourcc) 62 { 63 const struct imx_media_pixfmt *cc; 64 65 cc = imx_media_find_ipu_format(code, PIXFMT_SEL_YUV_RGB); 66 if (cc) { 67 enum imx_pixfmt_sel fmt_sel = cc->cs == IPUV3_COLORSPACE_YUV 68 ? PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 69 70 cc = imx_media_find_pixel_format(fourcc, fmt_sel); 71 if (!cc) { 72 imx_media_enum_pixel_formats(&fourcc, 0, fmt_sel, 0); 73 cc = imx_media_find_pixel_format(fourcc, fmt_sel); 74 } 75 76 return cc; 77 } 78 79 return imx_media_find_mbus_format(code, PIXFMT_SEL_ANY); 80 } 81 82 static int capture_querycap(struct file *file, void *fh, 83 struct v4l2_capability *cap) 84 { 85 struct capture_priv *priv = video_drvdata(file); 86 87 strscpy(cap->driver, IMX_CAPTURE_NAME, sizeof(cap->driver)); 88 strscpy(cap->card, IMX_CAPTURE_NAME, sizeof(cap->card)); 89 snprintf(cap->bus_info, sizeof(cap->bus_info), 90 "platform:%s", dev_name(priv->dev)); 91 92 return 0; 93 } 94 95 static int capture_enum_fmt_vid_cap(struct file *file, void *fh, 96 struct v4l2_fmtdesc *f) 97 { 98 return imx_media_enum_pixel_formats(&f->pixelformat, f->index, 99 PIXFMT_SEL_ANY, f->mbus_code); 100 } 101 102 static int capture_enum_framesizes(struct file *file, void *fh, 103 struct v4l2_frmsizeenum *fsize) 104 { 105 const struct imx_media_pixfmt *cc; 106 107 if (fsize->index > 0) 108 return -EINVAL; 109 110 cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY); 111 if (!cc) 112 return -EINVAL; 113 114 /* 115 * TODO: The constraints are hardware-specific and may depend on the 116 * pixel format. This should come from the driver using 117 * imx_media_capture. 118 */ 119 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; 120 fsize->stepwise.min_width = 1; 121 fsize->stepwise.max_width = 65535; 122 fsize->stepwise.min_height = 1; 123 fsize->stepwise.max_height = 65535; 124 fsize->stepwise.step_width = 1; 125 fsize->stepwise.step_height = 1; 126 127 return 0; 128 } 129 130 static int capture_g_fmt_vid_cap(struct file *file, void *fh, 131 struct v4l2_format *f) 132 { 133 struct capture_priv *priv = video_drvdata(file); 134 135 f->fmt.pix = priv->vdev.fmt; 136 137 return 0; 138 } 139 140 static const struct imx_media_pixfmt * 141 __capture_try_fmt(struct v4l2_pix_format *pixfmt, struct v4l2_rect *compose) 142 { 143 struct v4l2_mbus_framefmt fmt_src; 144 const struct imx_media_pixfmt *cc; 145 146 /* 147 * Find the pixel format, default to the first supported format if not 148 * found. 149 */ 150 cc = imx_media_find_pixel_format(pixfmt->pixelformat, PIXFMT_SEL_ANY); 151 if (!cc) { 152 imx_media_enum_pixel_formats(&pixfmt->pixelformat, 0, 153 PIXFMT_SEL_ANY, 0); 154 cc = imx_media_find_pixel_format(pixfmt->pixelformat, 155 PIXFMT_SEL_ANY); 156 } 157 158 /* Allow IDMAC interweave but enforce field order from source. */ 159 if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) { 160 switch (pixfmt->field) { 161 case V4L2_FIELD_SEQ_TB: 162 pixfmt->field = V4L2_FIELD_INTERLACED_TB; 163 break; 164 case V4L2_FIELD_SEQ_BT: 165 pixfmt->field = V4L2_FIELD_INTERLACED_BT; 166 break; 167 default: 168 break; 169 } 170 } 171 172 v4l2_fill_mbus_format(&fmt_src, pixfmt, 0); 173 imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src, cc); 174 175 if (compose) { 176 compose->width = fmt_src.width; 177 compose->height = fmt_src.height; 178 } 179 180 return cc; 181 } 182 183 static int capture_try_fmt_vid_cap(struct file *file, void *fh, 184 struct v4l2_format *f) 185 { 186 __capture_try_fmt(&f->fmt.pix, NULL); 187 return 0; 188 } 189 190 static int capture_s_fmt_vid_cap(struct file *file, void *fh, 191 struct v4l2_format *f) 192 { 193 struct capture_priv *priv = video_drvdata(file); 194 const struct imx_media_pixfmt *cc; 195 196 if (vb2_is_busy(&priv->q)) { 197 dev_err(priv->dev, "%s queue busy\n", __func__); 198 return -EBUSY; 199 } 200 201 cc = __capture_try_fmt(&f->fmt.pix, &priv->vdev.compose); 202 203 priv->vdev.cc = cc; 204 priv->vdev.fmt = f->fmt.pix; 205 206 return 0; 207 } 208 209 static int capture_g_selection(struct file *file, void *fh, 210 struct v4l2_selection *s) 211 { 212 struct capture_priv *priv = video_drvdata(file); 213 214 switch (s->target) { 215 case V4L2_SEL_TGT_COMPOSE: 216 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 217 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 218 /* The compose rectangle is fixed to the source format. */ 219 s->r = priv->vdev.compose; 220 break; 221 case V4L2_SEL_TGT_COMPOSE_PADDED: 222 /* 223 * The hardware writes with a configurable but fixed DMA burst 224 * size. If the source format width is not burst size aligned, 225 * the written frame contains padding to the right. 226 */ 227 s->r.left = 0; 228 s->r.top = 0; 229 s->r.width = priv->vdev.fmt.width; 230 s->r.height = priv->vdev.fmt.height; 231 break; 232 default: 233 return -EINVAL; 234 } 235 236 return 0; 237 } 238 239 static int capture_subscribe_event(struct v4l2_fh *fh, 240 const struct v4l2_event_subscription *sub) 241 { 242 switch (sub->type) { 243 case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR: 244 return v4l2_event_subscribe(fh, sub, 0, NULL); 245 default: 246 return -EINVAL; 247 } 248 } 249 250 static const struct v4l2_ioctl_ops capture_ioctl_ops = { 251 .vidioc_querycap = capture_querycap, 252 253 .vidioc_enum_fmt_vid_cap = capture_enum_fmt_vid_cap, 254 .vidioc_enum_framesizes = capture_enum_framesizes, 255 256 .vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap, 257 .vidioc_try_fmt_vid_cap = capture_try_fmt_vid_cap, 258 .vidioc_s_fmt_vid_cap = capture_s_fmt_vid_cap, 259 260 .vidioc_g_selection = capture_g_selection, 261 262 .vidioc_reqbufs = vb2_ioctl_reqbufs, 263 .vidioc_create_bufs = vb2_ioctl_create_bufs, 264 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 265 .vidioc_querybuf = vb2_ioctl_querybuf, 266 .vidioc_qbuf = vb2_ioctl_qbuf, 267 .vidioc_dqbuf = vb2_ioctl_dqbuf, 268 .vidioc_expbuf = vb2_ioctl_expbuf, 269 .vidioc_streamon = vb2_ioctl_streamon, 270 .vidioc_streamoff = vb2_ioctl_streamoff, 271 272 .vidioc_subscribe_event = capture_subscribe_event, 273 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 274 }; 275 276 /* ----------------------------------------------------------------------------- 277 * Legacy Video IOCTLs 278 */ 279 280 static int capture_legacy_enum_framesizes(struct file *file, void *fh, 281 struct v4l2_frmsizeenum *fsize) 282 { 283 struct capture_priv *priv = video_drvdata(file); 284 const struct imx_media_pixfmt *cc; 285 struct v4l2_subdev_frame_size_enum fse = { 286 .index = fsize->index, 287 .pad = priv->src_sd_pad, 288 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 289 }; 290 int ret; 291 292 cc = imx_media_find_pixel_format(fsize->pixel_format, PIXFMT_SEL_ANY); 293 if (!cc) 294 return -EINVAL; 295 296 fse.code = cc->codes ? cc->codes[0] : 0; 297 298 ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_size, NULL, &fse); 299 if (ret) 300 return ret; 301 302 if (fse.min_width == fse.max_width && 303 fse.min_height == fse.max_height) { 304 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 305 fsize->discrete.width = fse.min_width; 306 fsize->discrete.height = fse.min_height; 307 } else { 308 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; 309 fsize->stepwise.min_width = fse.min_width; 310 fsize->stepwise.max_width = fse.max_width; 311 fsize->stepwise.min_height = fse.min_height; 312 fsize->stepwise.max_height = fse.max_height; 313 fsize->stepwise.step_width = 1; 314 fsize->stepwise.step_height = 1; 315 } 316 317 return 0; 318 } 319 320 static int capture_legacy_enum_frameintervals(struct file *file, void *fh, 321 struct v4l2_frmivalenum *fival) 322 { 323 struct capture_priv *priv = video_drvdata(file); 324 const struct imx_media_pixfmt *cc; 325 struct v4l2_subdev_frame_interval_enum fie = { 326 .index = fival->index, 327 .pad = priv->src_sd_pad, 328 .width = fival->width, 329 .height = fival->height, 330 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 331 }; 332 int ret; 333 334 cc = imx_media_find_pixel_format(fival->pixel_format, PIXFMT_SEL_ANY); 335 if (!cc) 336 return -EINVAL; 337 338 fie.code = cc->codes ? cc->codes[0] : 0; 339 340 ret = v4l2_subdev_call(priv->src_sd, pad, enum_frame_interval, 341 NULL, &fie); 342 if (ret) 343 return ret; 344 345 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 346 fival->discrete = fie.interval; 347 348 return 0; 349 } 350 351 static int capture_legacy_enum_fmt_vid_cap(struct file *file, void *fh, 352 struct v4l2_fmtdesc *f) 353 { 354 struct capture_priv *priv = video_drvdata(file); 355 const struct imx_media_pixfmt *cc_src; 356 struct v4l2_subdev_format fmt_src = { 357 .pad = priv->src_sd_pad, 358 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 359 }; 360 u32 fourcc; 361 int ret; 362 363 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src); 364 if (ret) { 365 dev_err(priv->dev, "failed to get src_sd format\n"); 366 return ret; 367 } 368 369 cc_src = imx_media_find_ipu_format(fmt_src.format.code, 370 PIXFMT_SEL_YUV_RGB); 371 if (cc_src) { 372 enum imx_pixfmt_sel fmt_sel = 373 (cc_src->cs == IPUV3_COLORSPACE_YUV) ? 374 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 375 376 ret = imx_media_enum_pixel_formats(&fourcc, f->index, fmt_sel, 377 0); 378 if (ret) 379 return ret; 380 } else { 381 cc_src = imx_media_find_mbus_format(fmt_src.format.code, 382 PIXFMT_SEL_ANY); 383 if (WARN_ON(!cc_src)) 384 return -EINVAL; 385 386 if (f->index != 0) 387 return -EINVAL; 388 fourcc = cc_src->fourcc; 389 } 390 391 f->pixelformat = fourcc; 392 393 return 0; 394 } 395 396 static const struct imx_media_pixfmt * 397 __capture_legacy_try_fmt(struct capture_priv *priv, 398 struct v4l2_subdev_format *fmt_src, 399 struct v4l2_pix_format *pixfmt) 400 { 401 const struct imx_media_pixfmt *cc; 402 403 cc = capture_find_format(fmt_src->format.code, pixfmt->pixelformat); 404 if (WARN_ON(!cc)) 405 return NULL; 406 407 /* allow IDMAC interweave but enforce field order from source */ 408 if (V4L2_FIELD_IS_INTERLACED(pixfmt->field)) { 409 switch (fmt_src->format.field) { 410 case V4L2_FIELD_SEQ_TB: 411 fmt_src->format.field = V4L2_FIELD_INTERLACED_TB; 412 break; 413 case V4L2_FIELD_SEQ_BT: 414 fmt_src->format.field = V4L2_FIELD_INTERLACED_BT; 415 break; 416 default: 417 break; 418 } 419 } 420 421 imx_media_mbus_fmt_to_pix_fmt(pixfmt, &fmt_src->format, cc); 422 423 return cc; 424 } 425 426 static int capture_legacy_try_fmt_vid_cap(struct file *file, void *fh, 427 struct v4l2_format *f) 428 { 429 struct capture_priv *priv = video_drvdata(file); 430 struct v4l2_subdev_format fmt_src = { 431 .pad = priv->src_sd_pad, 432 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 433 }; 434 int ret; 435 436 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src); 437 if (ret) 438 return ret; 439 440 if (!__capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix)) 441 return -EINVAL; 442 443 return 0; 444 } 445 446 static int capture_legacy_s_fmt_vid_cap(struct file *file, void *fh, 447 struct v4l2_format *f) 448 { 449 struct capture_priv *priv = video_drvdata(file); 450 struct v4l2_subdev_format fmt_src = { 451 .pad = priv->src_sd_pad, 452 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 453 }; 454 const struct imx_media_pixfmt *cc; 455 int ret; 456 457 if (vb2_is_busy(&priv->q)) { 458 dev_err(priv->dev, "%s queue busy\n", __func__); 459 return -EBUSY; 460 } 461 462 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src); 463 if (ret) 464 return ret; 465 466 cc = __capture_legacy_try_fmt(priv, &fmt_src, &f->fmt.pix); 467 if (!cc) 468 return -EINVAL; 469 470 priv->vdev.cc = cc; 471 priv->vdev.fmt = f->fmt.pix; 472 priv->vdev.compose.width = fmt_src.format.width; 473 priv->vdev.compose.height = fmt_src.format.height; 474 475 return 0; 476 } 477 478 static int capture_legacy_querystd(struct file *file, void *fh, 479 v4l2_std_id *std) 480 { 481 struct capture_priv *priv = video_drvdata(file); 482 483 return v4l2_subdev_call(priv->src_sd, video, querystd, std); 484 } 485 486 static int capture_legacy_g_std(struct file *file, void *fh, v4l2_std_id *std) 487 { 488 struct capture_priv *priv = video_drvdata(file); 489 490 return v4l2_subdev_call(priv->src_sd, video, g_std, std); 491 } 492 493 static int capture_legacy_s_std(struct file *file, void *fh, v4l2_std_id std) 494 { 495 struct capture_priv *priv = video_drvdata(file); 496 497 if (vb2_is_busy(&priv->q)) 498 return -EBUSY; 499 500 return v4l2_subdev_call(priv->src_sd, video, s_std, std); 501 } 502 503 static int capture_legacy_g_parm(struct file *file, void *fh, 504 struct v4l2_streamparm *a) 505 { 506 struct capture_priv *priv = video_drvdata(file); 507 struct v4l2_subdev_frame_interval fi = { 508 .pad = priv->src_sd_pad, 509 }; 510 int ret; 511 512 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 513 return -EINVAL; 514 515 ret = v4l2_subdev_call(priv->src_sd, video, g_frame_interval, &fi); 516 if (ret < 0) 517 return ret; 518 519 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 520 a->parm.capture.timeperframe = fi.interval; 521 522 return 0; 523 } 524 525 static int capture_legacy_s_parm(struct file *file, void *fh, 526 struct v4l2_streamparm *a) 527 { 528 struct capture_priv *priv = video_drvdata(file); 529 struct v4l2_subdev_frame_interval fi = { 530 .pad = priv->src_sd_pad, 531 }; 532 int ret; 533 534 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 535 return -EINVAL; 536 537 fi.interval = a->parm.capture.timeperframe; 538 ret = v4l2_subdev_call(priv->src_sd, video, s_frame_interval, &fi); 539 if (ret < 0) 540 return ret; 541 542 a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 543 a->parm.capture.timeperframe = fi.interval; 544 545 return 0; 546 } 547 548 static int capture_legacy_subscribe_event(struct v4l2_fh *fh, 549 const struct v4l2_event_subscription *sub) 550 { 551 switch (sub->type) { 552 case V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR: 553 return v4l2_event_subscribe(fh, sub, 0, NULL); 554 case V4L2_EVENT_SOURCE_CHANGE: 555 return v4l2_src_change_event_subscribe(fh, sub); 556 case V4L2_EVENT_CTRL: 557 return v4l2_ctrl_subscribe_event(fh, sub); 558 default: 559 return -EINVAL; 560 } 561 } 562 563 static const struct v4l2_ioctl_ops capture_legacy_ioctl_ops = { 564 .vidioc_querycap = capture_querycap, 565 566 .vidioc_enum_framesizes = capture_legacy_enum_framesizes, 567 .vidioc_enum_frameintervals = capture_legacy_enum_frameintervals, 568 569 .vidioc_enum_fmt_vid_cap = capture_legacy_enum_fmt_vid_cap, 570 .vidioc_g_fmt_vid_cap = capture_g_fmt_vid_cap, 571 .vidioc_try_fmt_vid_cap = capture_legacy_try_fmt_vid_cap, 572 .vidioc_s_fmt_vid_cap = capture_legacy_s_fmt_vid_cap, 573 574 .vidioc_querystd = capture_legacy_querystd, 575 .vidioc_g_std = capture_legacy_g_std, 576 .vidioc_s_std = capture_legacy_s_std, 577 578 .vidioc_g_selection = capture_g_selection, 579 580 .vidioc_g_parm = capture_legacy_g_parm, 581 .vidioc_s_parm = capture_legacy_s_parm, 582 583 .vidioc_reqbufs = vb2_ioctl_reqbufs, 584 .vidioc_create_bufs = vb2_ioctl_create_bufs, 585 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 586 .vidioc_querybuf = vb2_ioctl_querybuf, 587 .vidioc_qbuf = vb2_ioctl_qbuf, 588 .vidioc_dqbuf = vb2_ioctl_dqbuf, 589 .vidioc_expbuf = vb2_ioctl_expbuf, 590 .vidioc_streamon = vb2_ioctl_streamon, 591 .vidioc_streamoff = vb2_ioctl_streamoff, 592 593 .vidioc_subscribe_event = capture_legacy_subscribe_event, 594 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 595 }; 596 597 /* ----------------------------------------------------------------------------- 598 * Queue Operations 599 */ 600 601 static int capture_queue_setup(struct vb2_queue *vq, 602 unsigned int *nbuffers, 603 unsigned int *nplanes, 604 unsigned int sizes[], 605 struct device *alloc_devs[]) 606 { 607 struct capture_priv *priv = vb2_get_drv_priv(vq); 608 struct v4l2_pix_format *pix = &priv->vdev.fmt; 609 unsigned int count = *nbuffers; 610 611 if (vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 612 return -EINVAL; 613 614 if (*nplanes) { 615 if (*nplanes != 1 || sizes[0] < pix->sizeimage) 616 return -EINVAL; 617 count += vq->num_buffers; 618 } 619 620 count = min_t(__u32, VID_MEM_LIMIT / pix->sizeimage, count); 621 622 if (*nplanes) 623 *nbuffers = (count < vq->num_buffers) ? 0 : 624 count - vq->num_buffers; 625 else 626 *nbuffers = count; 627 628 *nplanes = 1; 629 sizes[0] = pix->sizeimage; 630 631 return 0; 632 } 633 634 static int capture_buf_init(struct vb2_buffer *vb) 635 { 636 struct imx_media_buffer *buf = to_imx_media_vb(vb); 637 638 INIT_LIST_HEAD(&buf->list); 639 640 return 0; 641 } 642 643 static int capture_buf_prepare(struct vb2_buffer *vb) 644 { 645 struct vb2_queue *vq = vb->vb2_queue; 646 struct capture_priv *priv = vb2_get_drv_priv(vq); 647 struct v4l2_pix_format *pix = &priv->vdev.fmt; 648 649 if (vb2_plane_size(vb, 0) < pix->sizeimage) { 650 dev_err(priv->dev, 651 "data will not fit into plane (%lu < %lu)\n", 652 vb2_plane_size(vb, 0), (long)pix->sizeimage); 653 return -EINVAL; 654 } 655 656 vb2_set_plane_payload(vb, 0, pix->sizeimage); 657 658 return 0; 659 } 660 661 static void capture_buf_queue(struct vb2_buffer *vb) 662 { 663 struct capture_priv *priv = vb2_get_drv_priv(vb->vb2_queue); 664 struct imx_media_buffer *buf = to_imx_media_vb(vb); 665 unsigned long flags; 666 667 spin_lock_irqsave(&priv->q_lock, flags); 668 669 list_add_tail(&buf->list, &priv->ready_q); 670 671 spin_unlock_irqrestore(&priv->q_lock, flags); 672 } 673 674 static int capture_validate_fmt(struct capture_priv *priv) 675 { 676 struct v4l2_subdev_format fmt_src = { 677 .pad = priv->src_sd_pad, 678 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 679 }; 680 const struct imx_media_pixfmt *cc; 681 int ret; 682 683 /* Retrieve the media bus format on the source subdev. */ 684 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, &fmt_src); 685 if (ret) 686 return ret; 687 688 /* 689 * Verify that the media bus size matches the size set on the video 690 * node. It is sufficient to check the compose rectangle size without 691 * checking the rounded size from vdev.fmt, as the rounded size is 692 * derived directly from the compose rectangle size, and will thus 693 * always match if the compose rectangle matches. 694 */ 695 if (priv->vdev.compose.width != fmt_src.format.width || 696 priv->vdev.compose.height != fmt_src.format.height) 697 return -EPIPE; 698 699 /* 700 * Verify that the media bus code is compatible with the pixel format 701 * set on the video node. 702 */ 703 cc = capture_find_format(fmt_src.format.code, 0); 704 if (!cc || priv->vdev.cc->cs != cc->cs) 705 return -EPIPE; 706 707 return 0; 708 } 709 710 static int capture_start_streaming(struct vb2_queue *vq, unsigned int count) 711 { 712 struct capture_priv *priv = vb2_get_drv_priv(vq); 713 struct imx_media_buffer *buf, *tmp; 714 unsigned long flags; 715 int ret; 716 717 ret = capture_validate_fmt(priv); 718 if (ret) { 719 dev_err(priv->dev, "capture format not valid\n"); 720 goto return_bufs; 721 } 722 723 ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity, 724 true); 725 if (ret) { 726 dev_err(priv->dev, "pipeline start failed with %d\n", ret); 727 goto return_bufs; 728 } 729 730 return 0; 731 732 return_bufs: 733 spin_lock_irqsave(&priv->q_lock, flags); 734 list_for_each_entry_safe(buf, tmp, &priv->ready_q, list) { 735 list_del(&buf->list); 736 vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_QUEUED); 737 } 738 spin_unlock_irqrestore(&priv->q_lock, flags); 739 return ret; 740 } 741 742 static void capture_stop_streaming(struct vb2_queue *vq) 743 { 744 struct capture_priv *priv = vb2_get_drv_priv(vq); 745 struct imx_media_buffer *frame; 746 struct imx_media_buffer *tmp; 747 unsigned long flags; 748 int ret; 749 750 ret = imx_media_pipeline_set_stream(priv->md, &priv->src_sd->entity, 751 false); 752 if (ret) 753 dev_warn(priv->dev, "pipeline stop failed with %d\n", ret); 754 755 /* release all active buffers */ 756 spin_lock_irqsave(&priv->q_lock, flags); 757 list_for_each_entry_safe(frame, tmp, &priv->ready_q, list) { 758 list_del(&frame->list); 759 vb2_buffer_done(&frame->vbuf.vb2_buf, VB2_BUF_STATE_ERROR); 760 } 761 spin_unlock_irqrestore(&priv->q_lock, flags); 762 } 763 764 static const struct vb2_ops capture_qops = { 765 .queue_setup = capture_queue_setup, 766 .buf_init = capture_buf_init, 767 .buf_prepare = capture_buf_prepare, 768 .buf_queue = capture_buf_queue, 769 .wait_prepare = vb2_ops_wait_prepare, 770 .wait_finish = vb2_ops_wait_finish, 771 .start_streaming = capture_start_streaming, 772 .stop_streaming = capture_stop_streaming, 773 }; 774 775 /* ----------------------------------------------------------------------------- 776 * File Operations 777 */ 778 779 static int capture_open(struct file *file) 780 { 781 struct capture_priv *priv = video_drvdata(file); 782 struct video_device *vfd = priv->vdev.vfd; 783 int ret; 784 785 if (mutex_lock_interruptible(&priv->mutex)) 786 return -ERESTARTSYS; 787 788 ret = v4l2_fh_open(file); 789 if (ret) { 790 dev_err(priv->dev, "v4l2_fh_open failed\n"); 791 goto out; 792 } 793 794 ret = v4l2_pipeline_pm_get(&vfd->entity); 795 if (ret) 796 v4l2_fh_release(file); 797 798 out: 799 mutex_unlock(&priv->mutex); 800 return ret; 801 } 802 803 static int capture_release(struct file *file) 804 { 805 struct capture_priv *priv = video_drvdata(file); 806 struct video_device *vfd = priv->vdev.vfd; 807 struct vb2_queue *vq = &priv->q; 808 809 mutex_lock(&priv->mutex); 810 811 if (file->private_data == vq->owner) { 812 vb2_queue_release(vq); 813 vq->owner = NULL; 814 } 815 816 v4l2_pipeline_pm_put(&vfd->entity); 817 818 v4l2_fh_release(file); 819 mutex_unlock(&priv->mutex); 820 return 0; 821 } 822 823 static const struct v4l2_file_operations capture_fops = { 824 .owner = THIS_MODULE, 825 .open = capture_open, 826 .release = capture_release, 827 .poll = vb2_fop_poll, 828 .unlocked_ioctl = video_ioctl2, 829 .mmap = vb2_fop_mmap, 830 }; 831 832 /* ----------------------------------------------------------------------------- 833 * Public API 834 */ 835 836 struct imx_media_buffer * 837 imx_media_capture_device_next_buf(struct imx_media_video_dev *vdev) 838 { 839 struct capture_priv *priv = to_capture_priv(vdev); 840 struct imx_media_buffer *buf = NULL; 841 unsigned long flags; 842 843 spin_lock_irqsave(&priv->q_lock, flags); 844 845 /* get next queued buffer */ 846 if (!list_empty(&priv->ready_q)) { 847 buf = list_entry(priv->ready_q.next, struct imx_media_buffer, 848 list); 849 list_del(&buf->list); 850 } 851 852 spin_unlock_irqrestore(&priv->q_lock, flags); 853 854 return buf; 855 } 856 EXPORT_SYMBOL_GPL(imx_media_capture_device_next_buf); 857 858 void imx_media_capture_device_error(struct imx_media_video_dev *vdev) 859 { 860 struct capture_priv *priv = to_capture_priv(vdev); 861 struct vb2_queue *vq = &priv->q; 862 unsigned long flags; 863 864 if (!vb2_is_streaming(vq)) 865 return; 866 867 spin_lock_irqsave(&priv->q_lock, flags); 868 vb2_queue_error(vq); 869 spin_unlock_irqrestore(&priv->q_lock, flags); 870 } 871 EXPORT_SYMBOL_GPL(imx_media_capture_device_error); 872 873 static int capture_init_format(struct capture_priv *priv) 874 { 875 struct v4l2_subdev_format fmt_src = { 876 .pad = priv->src_sd_pad, 877 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 878 }; 879 struct imx_media_video_dev *vdev = &priv->vdev; 880 int ret; 881 882 if (priv->legacy_api) { 883 ret = v4l2_subdev_call(priv->src_sd, pad, get_fmt, NULL, 884 &fmt_src); 885 if (ret) { 886 dev_err(priv->dev, "failed to get source format\n"); 887 return ret; 888 } 889 } else { 890 fmt_src.format.code = MEDIA_BUS_FMT_UYVY8_2X8; 891 fmt_src.format.width = IMX_MEDIA_DEF_PIX_WIDTH; 892 fmt_src.format.height = IMX_MEDIA_DEF_PIX_HEIGHT; 893 } 894 895 imx_media_mbus_fmt_to_pix_fmt(&vdev->fmt, &fmt_src.format, NULL); 896 vdev->compose.width = fmt_src.format.width; 897 vdev->compose.height = fmt_src.format.height; 898 899 vdev->cc = imx_media_find_pixel_format(vdev->fmt.pixelformat, 900 PIXFMT_SEL_ANY); 901 902 return 0; 903 } 904 905 int imx_media_capture_device_register(struct imx_media_video_dev *vdev, 906 u32 link_flags) 907 { 908 struct capture_priv *priv = to_capture_priv(vdev); 909 struct v4l2_subdev *sd = priv->src_sd; 910 struct v4l2_device *v4l2_dev = sd->v4l2_dev; 911 struct video_device *vfd = vdev->vfd; 912 int ret; 913 914 /* get media device */ 915 priv->md = container_of(v4l2_dev->mdev, struct imx_media_dev, md); 916 917 vfd->v4l2_dev = v4l2_dev; 918 919 /* Initialize the default format and compose rectangle. */ 920 ret = capture_init_format(priv); 921 if (ret < 0) 922 return ret; 923 924 /* Register the video device. */ 925 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1); 926 if (ret) { 927 dev_err(priv->dev, "Failed to register video device\n"); 928 return ret; 929 } 930 931 dev_info(priv->dev, "Registered %s as /dev/%s\n", vfd->name, 932 video_device_node_name(vfd)); 933 934 /* Create the link from the src_sd devnode pad to device node. */ 935 if (link_flags & MEDIA_LNK_FL_IMMUTABLE) 936 link_flags |= MEDIA_LNK_FL_ENABLED; 937 ret = media_create_pad_link(&sd->entity, priv->src_sd_pad, 938 &vfd->entity, 0, link_flags); 939 if (ret) { 940 dev_err(priv->dev, "failed to create link to device node\n"); 941 video_unregister_device(vfd); 942 return ret; 943 } 944 945 /* Add vdev to the video devices list. */ 946 imx_media_add_video_device(priv->md, vdev); 947 948 return 0; 949 } 950 EXPORT_SYMBOL_GPL(imx_media_capture_device_register); 951 952 void imx_media_capture_device_unregister(struct imx_media_video_dev *vdev) 953 { 954 struct capture_priv *priv = to_capture_priv(vdev); 955 struct video_device *vfd = priv->vdev.vfd; 956 957 media_entity_cleanup(&vfd->entity); 958 video_unregister_device(vfd); 959 } 960 EXPORT_SYMBOL_GPL(imx_media_capture_device_unregister); 961 962 struct imx_media_video_dev * 963 imx_media_capture_device_init(struct device *dev, struct v4l2_subdev *src_sd, 964 int pad, bool legacy_api) 965 { 966 struct capture_priv *priv; 967 struct video_device *vfd; 968 struct vb2_queue *vq; 969 int ret; 970 971 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 972 if (!priv) 973 return ERR_PTR(-ENOMEM); 974 975 priv->src_sd = src_sd; 976 priv->src_sd_pad = pad; 977 priv->dev = dev; 978 priv->legacy_api = legacy_api; 979 980 mutex_init(&priv->mutex); 981 INIT_LIST_HEAD(&priv->ready_q); 982 spin_lock_init(&priv->q_lock); 983 984 /* Allocate and initialize the video device. */ 985 vfd = video_device_alloc(); 986 if (!vfd) 987 return ERR_PTR(-ENOMEM); 988 989 vfd->fops = &capture_fops; 990 vfd->ioctl_ops = legacy_api ? &capture_legacy_ioctl_ops 991 : &capture_ioctl_ops; 992 vfd->minor = -1; 993 vfd->release = video_device_release; 994 vfd->vfl_dir = VFL_DIR_RX; 995 vfd->tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM; 996 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING 997 | (!legacy_api ? V4L2_CAP_IO_MC : 0); 998 vfd->lock = &priv->mutex; 999 vfd->queue = &priv->q; 1000 1001 snprintf(vfd->name, sizeof(vfd->name), "%s capture", src_sd->name); 1002 1003 video_set_drvdata(vfd, priv); 1004 priv->vdev.vfd = vfd; 1005 INIT_LIST_HEAD(&priv->vdev.list); 1006 1007 /* Initialize the video device pad. */ 1008 priv->vdev_pad.flags = MEDIA_PAD_FL_SINK; 1009 ret = media_entity_pads_init(&vfd->entity, 1, &priv->vdev_pad); 1010 if (ret) { 1011 video_device_release(vfd); 1012 return ERR_PTR(ret); 1013 } 1014 1015 /* Initialize the vb2 queue. */ 1016 vq = &priv->q; 1017 vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1018 vq->io_modes = VB2_MMAP | VB2_DMABUF; 1019 vq->drv_priv = priv; 1020 vq->buf_struct_size = sizeof(struct imx_media_buffer); 1021 vq->ops = &capture_qops; 1022 vq->mem_ops = &vb2_dma_contig_memops; 1023 vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1024 vq->lock = &priv->mutex; 1025 vq->min_buffers_needed = 2; 1026 vq->dev = priv->dev; 1027 1028 ret = vb2_queue_init(vq); 1029 if (ret) { 1030 dev_err(priv->dev, "vb2_queue_init failed\n"); 1031 video_device_release(vfd); 1032 return ERR_PTR(ret); 1033 } 1034 1035 if (legacy_api) { 1036 /* Initialize the control handler. */ 1037 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1038 vfd->ctrl_handler = &priv->ctrl_hdlr; 1039 } 1040 1041 return &priv->vdev; 1042 } 1043 EXPORT_SYMBOL_GPL(imx_media_capture_device_init); 1044 1045 void imx_media_capture_device_remove(struct imx_media_video_dev *vdev) 1046 { 1047 struct capture_priv *priv = to_capture_priv(vdev); 1048 1049 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1050 } 1051 EXPORT_SYMBOL_GPL(imx_media_capture_device_remove); 1052 1053 MODULE_DESCRIPTION("i.MX5/6 v4l2 video capture interface driver"); 1054 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 1055 MODULE_LICENSE("GPL"); 1056