1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * TI Camera Access Layer (CAL) - Video Device 4 * 5 * Copyright (c) 2015-2020 Texas Instruments Inc. 6 * 7 * Authors: 8 * Benoit Parrot <bparrot@ti.com> 9 * Laurent Pinchart <laurent.pinchart@ideasonboard.com> 10 */ 11 12 #include <linux/ioctl.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/videodev2.h> 15 16 #include <media/media-device.h> 17 #include <media/v4l2-common.h> 18 #include <media/v4l2-ctrls.h> 19 #include <media/v4l2-device.h> 20 #include <media/v4l2-event.h> 21 #include <media/v4l2-fh.h> 22 #include <media/v4l2-ioctl.h> 23 #include <media/videobuf2-core.h> 24 #include <media/videobuf2-dma-contig.h> 25 26 #include "cal.h" 27 28 /* Print Four-character-code (FOURCC) */ 29 static char *fourcc_to_str(u32 fmt) 30 { 31 static char code[5]; 32 33 code[0] = (unsigned char)(fmt & 0xff); 34 code[1] = (unsigned char)((fmt >> 8) & 0xff); 35 code[2] = (unsigned char)((fmt >> 16) & 0xff); 36 code[3] = (unsigned char)((fmt >> 24) & 0xff); 37 code[4] = '\0'; 38 39 return code; 40 } 41 42 /* ------------------------------------------------------------------ 43 * V4L2 Common IOCTLs 44 * ------------------------------------------------------------------ 45 */ 46 47 static int cal_querycap(struct file *file, void *priv, 48 struct v4l2_capability *cap) 49 { 50 struct cal_ctx *ctx = video_drvdata(file); 51 52 strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver)); 53 strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card)); 54 55 snprintf(cap->bus_info, sizeof(cap->bus_info), 56 "platform:%s", dev_name(ctx->cal->dev)); 57 return 0; 58 } 59 60 static int cal_g_fmt_vid_cap(struct file *file, void *priv, 61 struct v4l2_format *f) 62 { 63 struct cal_ctx *ctx = video_drvdata(file); 64 65 *f = ctx->v_fmt; 66 67 return 0; 68 } 69 70 /* ------------------------------------------------------------------ 71 * V4L2 Video Node Centric IOCTLs 72 * ------------------------------------------------------------------ 73 */ 74 75 static const struct cal_format_info *find_format_by_pix(struct cal_ctx *ctx, 76 u32 pixelformat) 77 { 78 const struct cal_format_info *fmtinfo; 79 unsigned int k; 80 81 for (k = 0; k < ctx->num_active_fmt; k++) { 82 fmtinfo = ctx->active_fmt[k]; 83 if (fmtinfo->fourcc == pixelformat) 84 return fmtinfo; 85 } 86 87 return NULL; 88 } 89 90 static const struct cal_format_info *find_format_by_code(struct cal_ctx *ctx, 91 u32 code) 92 { 93 const struct cal_format_info *fmtinfo; 94 unsigned int k; 95 96 for (k = 0; k < ctx->num_active_fmt; k++) { 97 fmtinfo = ctx->active_fmt[k]; 98 if (fmtinfo->code == code) 99 return fmtinfo; 100 } 101 102 return NULL; 103 } 104 105 static int cal_legacy_enum_fmt_vid_cap(struct file *file, void *priv, 106 struct v4l2_fmtdesc *f) 107 { 108 struct cal_ctx *ctx = video_drvdata(file); 109 const struct cal_format_info *fmtinfo; 110 111 if (f->index >= ctx->num_active_fmt) 112 return -EINVAL; 113 114 fmtinfo = ctx->active_fmt[f->index]; 115 116 f->pixelformat = fmtinfo->fourcc; 117 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 118 return 0; 119 } 120 121 static int __subdev_get_format(struct cal_ctx *ctx, 122 struct v4l2_mbus_framefmt *fmt) 123 { 124 struct v4l2_subdev_format sd_fmt; 125 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; 126 int ret; 127 128 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 129 sd_fmt.pad = 0; 130 131 ret = v4l2_subdev_call(ctx->phy->source, pad, get_fmt, NULL, &sd_fmt); 132 if (ret) 133 return ret; 134 135 *fmt = *mbus_fmt; 136 137 ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, 138 fmt->width, fmt->height, fmt->code); 139 140 return 0; 141 } 142 143 static int __subdev_set_format(struct cal_ctx *ctx, 144 struct v4l2_mbus_framefmt *fmt) 145 { 146 struct v4l2_subdev_format sd_fmt; 147 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; 148 int ret; 149 150 sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 151 sd_fmt.pad = 0; 152 *mbus_fmt = *fmt; 153 154 ret = v4l2_subdev_call(ctx->phy->source, pad, set_fmt, NULL, &sd_fmt); 155 if (ret) 156 return ret; 157 158 ctx_dbg(1, ctx, "%s %dx%d code:%04X\n", __func__, 159 fmt->width, fmt->height, fmt->code); 160 161 return 0; 162 } 163 164 static void cal_calc_format_size(struct cal_ctx *ctx, 165 const struct cal_format_info *fmtinfo, 166 struct v4l2_format *f) 167 { 168 u32 bpl, max_width; 169 170 /* 171 * Maximum width is bound by the DMA max width in bytes. 172 * We need to recalculate the actual maxi width depending on the 173 * number of bytes per pixels required. 174 */ 175 max_width = CAL_MAX_WIDTH_BYTES / (ALIGN(fmtinfo->bpp, 8) >> 3); 176 v4l_bound_align_image(&f->fmt.pix.width, 48, max_width, 2, 177 &f->fmt.pix.height, 32, CAL_MAX_HEIGHT_LINES, 178 0, 0); 179 180 bpl = (f->fmt.pix.width * ALIGN(fmtinfo->bpp, 8)) >> 3; 181 f->fmt.pix.bytesperline = ALIGN(bpl, 16); 182 183 f->fmt.pix.sizeimage = f->fmt.pix.height * 184 f->fmt.pix.bytesperline; 185 186 ctx_dbg(3, ctx, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n", 187 __func__, fourcc_to_str(f->fmt.pix.pixelformat), 188 f->fmt.pix.width, f->fmt.pix.height, 189 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); 190 } 191 192 static int cal_legacy_try_fmt_vid_cap(struct file *file, void *priv, 193 struct v4l2_format *f) 194 { 195 struct cal_ctx *ctx = video_drvdata(file); 196 const struct cal_format_info *fmtinfo; 197 struct v4l2_subdev_frame_size_enum fse; 198 int ret, found; 199 200 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat); 201 if (!fmtinfo) { 202 ctx_dbg(3, ctx, "Fourcc format (0x%08x) not found.\n", 203 f->fmt.pix.pixelformat); 204 205 /* Just get the first one enumerated */ 206 fmtinfo = ctx->active_fmt[0]; 207 f->fmt.pix.pixelformat = fmtinfo->fourcc; 208 } 209 210 f->fmt.pix.field = ctx->v_fmt.fmt.pix.field; 211 212 /* check for/find a valid width/height */ 213 ret = 0; 214 found = false; 215 fse.pad = 0; 216 fse.code = fmtinfo->code; 217 fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; 218 for (fse.index = 0; ; fse.index++) { 219 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size, 220 NULL, &fse); 221 if (ret) 222 break; 223 224 if ((f->fmt.pix.width == fse.max_width) && 225 (f->fmt.pix.height == fse.max_height)) { 226 found = true; 227 break; 228 } else if ((f->fmt.pix.width >= fse.min_width) && 229 (f->fmt.pix.width <= fse.max_width) && 230 (f->fmt.pix.height >= fse.min_height) && 231 (f->fmt.pix.height <= fse.max_height)) { 232 found = true; 233 break; 234 } 235 } 236 237 if (!found) { 238 /* use existing values as default */ 239 f->fmt.pix.width = ctx->v_fmt.fmt.pix.width; 240 f->fmt.pix.height = ctx->v_fmt.fmt.pix.height; 241 } 242 243 /* 244 * Use current colorspace for now, it will get 245 * updated properly during s_fmt 246 */ 247 f->fmt.pix.colorspace = ctx->v_fmt.fmt.pix.colorspace; 248 cal_calc_format_size(ctx, fmtinfo, f); 249 return 0; 250 } 251 252 static int cal_legacy_s_fmt_vid_cap(struct file *file, void *priv, 253 struct v4l2_format *f) 254 { 255 struct cal_ctx *ctx = video_drvdata(file); 256 struct vb2_queue *q = &ctx->vb_vidq; 257 struct v4l2_subdev_format sd_fmt = { 258 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 259 .pad = CAL_CAMERARX_PAD_SINK, 260 }; 261 const struct cal_format_info *fmtinfo; 262 int ret; 263 264 if (vb2_is_busy(q)) { 265 ctx_dbg(3, ctx, "%s device busy\n", __func__); 266 return -EBUSY; 267 } 268 269 ret = cal_legacy_try_fmt_vid_cap(file, priv, f); 270 if (ret < 0) 271 return ret; 272 273 fmtinfo = find_format_by_pix(ctx, f->fmt.pix.pixelformat); 274 275 v4l2_fill_mbus_format(&sd_fmt.format, &f->fmt.pix, fmtinfo->code); 276 277 ret = __subdev_set_format(ctx, &sd_fmt.format); 278 if (ret) 279 return ret; 280 281 /* Just double check nothing has gone wrong */ 282 if (sd_fmt.format.code != fmtinfo->code) { 283 ctx_dbg(3, ctx, 284 "%s subdev changed format on us, this should not happen\n", 285 __func__); 286 return -EINVAL; 287 } 288 289 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &sd_fmt.format); 290 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 291 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc; 292 ctx->v_fmt.fmt.pix.field = sd_fmt.format.field; 293 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); 294 295 v4l2_subdev_call(&ctx->phy->subdev, pad, set_fmt, NULL, &sd_fmt); 296 297 ctx->fmtinfo = fmtinfo; 298 *f = ctx->v_fmt; 299 300 return 0; 301 } 302 303 static int cal_legacy_enum_framesizes(struct file *file, void *fh, 304 struct v4l2_frmsizeenum *fsize) 305 { 306 struct cal_ctx *ctx = video_drvdata(file); 307 const struct cal_format_info *fmtinfo; 308 struct v4l2_subdev_frame_size_enum fse; 309 int ret; 310 311 /* check for valid format */ 312 fmtinfo = find_format_by_pix(ctx, fsize->pixel_format); 313 if (!fmtinfo) { 314 ctx_dbg(3, ctx, "Invalid pixel code: %x\n", 315 fsize->pixel_format); 316 return -EINVAL; 317 } 318 319 fse.index = fsize->index; 320 fse.pad = 0; 321 fse.code = fmtinfo->code; 322 fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; 323 324 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_size, NULL, 325 &fse); 326 if (ret) 327 return ret; 328 329 ctx_dbg(1, ctx, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n", 330 __func__, fse.index, fse.code, fse.min_width, fse.max_width, 331 fse.min_height, fse.max_height); 332 333 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 334 fsize->discrete.width = fse.max_width; 335 fsize->discrete.height = fse.max_height; 336 337 return 0; 338 } 339 340 static int cal_legacy_enum_input(struct file *file, void *priv, 341 struct v4l2_input *inp) 342 { 343 if (inp->index > 0) 344 return -EINVAL; 345 346 inp->type = V4L2_INPUT_TYPE_CAMERA; 347 sprintf(inp->name, "Camera %u", inp->index); 348 return 0; 349 } 350 351 static int cal_legacy_g_input(struct file *file, void *priv, unsigned int *i) 352 { 353 *i = 0; 354 return 0; 355 } 356 357 static int cal_legacy_s_input(struct file *file, void *priv, unsigned int i) 358 { 359 return i > 0 ? -EINVAL : 0; 360 } 361 362 /* timeperframe is arbitrary and continuous */ 363 static int cal_legacy_enum_frameintervals(struct file *file, void *priv, 364 struct v4l2_frmivalenum *fival) 365 { 366 struct cal_ctx *ctx = video_drvdata(file); 367 const struct cal_format_info *fmtinfo; 368 struct v4l2_subdev_frame_interval_enum fie = { 369 .index = fival->index, 370 .width = fival->width, 371 .height = fival->height, 372 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 373 }; 374 int ret; 375 376 fmtinfo = find_format_by_pix(ctx, fival->pixel_format); 377 if (!fmtinfo) 378 return -EINVAL; 379 380 fie.code = fmtinfo->code; 381 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_frame_interval, 382 NULL, &fie); 383 if (ret) 384 return ret; 385 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 386 fival->discrete = fie.interval; 387 388 return 0; 389 } 390 391 static int cal_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 392 { 393 struct cal_ctx *ctx = video_drvdata(file); 394 395 return v4l2_g_parm_cap(video_devdata(file), ctx->phy->source, a); 396 } 397 398 static int cal_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) 399 { 400 struct cal_ctx *ctx = video_drvdata(file); 401 402 return v4l2_s_parm_cap(video_devdata(file), ctx->phy->source, a); 403 } 404 405 static const struct v4l2_ioctl_ops cal_ioctl_legacy_ops = { 406 .vidioc_querycap = cal_querycap, 407 .vidioc_enum_fmt_vid_cap = cal_legacy_enum_fmt_vid_cap, 408 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, 409 .vidioc_try_fmt_vid_cap = cal_legacy_try_fmt_vid_cap, 410 .vidioc_s_fmt_vid_cap = cal_legacy_s_fmt_vid_cap, 411 .vidioc_enum_framesizes = cal_legacy_enum_framesizes, 412 .vidioc_reqbufs = vb2_ioctl_reqbufs, 413 .vidioc_create_bufs = vb2_ioctl_create_bufs, 414 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 415 .vidioc_querybuf = vb2_ioctl_querybuf, 416 .vidioc_qbuf = vb2_ioctl_qbuf, 417 .vidioc_dqbuf = vb2_ioctl_dqbuf, 418 .vidioc_expbuf = vb2_ioctl_expbuf, 419 .vidioc_enum_input = cal_legacy_enum_input, 420 .vidioc_g_input = cal_legacy_g_input, 421 .vidioc_s_input = cal_legacy_s_input, 422 .vidioc_enum_frameintervals = cal_legacy_enum_frameintervals, 423 .vidioc_streamon = vb2_ioctl_streamon, 424 .vidioc_streamoff = vb2_ioctl_streamoff, 425 .vidioc_log_status = v4l2_ctrl_log_status, 426 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 427 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 428 .vidioc_g_parm = cal_legacy_g_parm, 429 .vidioc_s_parm = cal_legacy_s_parm, 430 }; 431 432 /* ------------------------------------------------------------------ 433 * V4L2 Media Controller Centric IOCTLs 434 * ------------------------------------------------------------------ 435 */ 436 437 static int cal_mc_enum_fmt_vid_cap(struct file *file, void *priv, 438 struct v4l2_fmtdesc *f) 439 { 440 unsigned int i; 441 unsigned int idx; 442 443 if (f->index >= cal_num_formats) 444 return -EINVAL; 445 446 idx = 0; 447 448 for (i = 0; i < cal_num_formats; ++i) { 449 if (f->mbus_code && cal_formats[i].code != f->mbus_code) 450 continue; 451 452 if (idx == f->index) { 453 f->pixelformat = cal_formats[i].fourcc; 454 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 455 return 0; 456 } 457 458 idx++; 459 } 460 461 return -EINVAL; 462 } 463 464 static void cal_mc_try_fmt(struct cal_ctx *ctx, struct v4l2_format *f, 465 const struct cal_format_info **info) 466 { 467 struct v4l2_pix_format *format = &f->fmt.pix; 468 const struct cal_format_info *fmtinfo; 469 unsigned int bpp; 470 471 /* 472 * Default to the first format if the requested pixel format code isn't 473 * supported. 474 */ 475 fmtinfo = cal_format_by_fourcc(f->fmt.pix.pixelformat); 476 if (!fmtinfo) 477 fmtinfo = &cal_formats[0]; 478 479 /* 480 * Clamp the size, update the pixel format. The field and colorspace are 481 * accepted as-is, except for V4L2_FIELD_ANY that is turned into 482 * V4L2_FIELD_NONE. 483 */ 484 bpp = ALIGN(fmtinfo->bpp, 8); 485 486 format->width = clamp_t(unsigned int, format->width, 487 CAL_MIN_WIDTH_BYTES * 8 / bpp, 488 CAL_MAX_WIDTH_BYTES * 8 / bpp); 489 format->height = clamp_t(unsigned int, format->height, 490 CAL_MIN_HEIGHT_LINES, CAL_MAX_HEIGHT_LINES); 491 format->pixelformat = fmtinfo->fourcc; 492 493 if (format->field == V4L2_FIELD_ANY) 494 format->field = V4L2_FIELD_NONE; 495 496 /* 497 * Calculate the number of bytes per line and the image size. The 498 * hardware stores the stride as a number of 16 bytes words, in a 499 * signed 15-bit value. Only 14 bits are thus usable. 500 */ 501 format->bytesperline = ALIGN(clamp(format->bytesperline, 502 format->width * bpp / 8, 503 ((1U << 14) - 1) * 16), 16); 504 505 format->sizeimage = format->height * format->bytesperline; 506 507 format->colorspace = ctx->v_fmt.fmt.pix.colorspace; 508 509 if (info) 510 *info = fmtinfo; 511 512 ctx_dbg(3, ctx, "%s: %s %ux%u (bytesperline %u sizeimage %u)\n", 513 __func__, fourcc_to_str(format->pixelformat), 514 format->width, format->height, 515 format->bytesperline, format->sizeimage); 516 } 517 518 static int cal_mc_try_fmt_vid_cap(struct file *file, void *priv, 519 struct v4l2_format *f) 520 { 521 struct cal_ctx *ctx = video_drvdata(file); 522 523 cal_mc_try_fmt(ctx, f, NULL); 524 return 0; 525 } 526 527 static int cal_mc_s_fmt_vid_cap(struct file *file, void *priv, 528 struct v4l2_format *f) 529 { 530 struct cal_ctx *ctx = video_drvdata(file); 531 const struct cal_format_info *fmtinfo; 532 533 if (vb2_is_busy(&ctx->vb_vidq)) { 534 ctx_dbg(3, ctx, "%s device busy\n", __func__); 535 return -EBUSY; 536 } 537 538 cal_mc_try_fmt(ctx, f, &fmtinfo); 539 540 ctx->v_fmt = *f; 541 ctx->fmtinfo = fmtinfo; 542 543 return 0; 544 } 545 546 static int cal_mc_enum_framesizes(struct file *file, void *fh, 547 struct v4l2_frmsizeenum *fsize) 548 { 549 struct cal_ctx *ctx = video_drvdata(file); 550 const struct cal_format_info *fmtinfo; 551 unsigned int bpp; 552 553 if (fsize->index > 0) 554 return -EINVAL; 555 556 fmtinfo = cal_format_by_fourcc(fsize->pixel_format); 557 if (!fmtinfo) { 558 ctx_dbg(3, ctx, "Invalid pixel format 0x%08x\n", 559 fsize->pixel_format); 560 return -EINVAL; 561 } 562 563 bpp = ALIGN(fmtinfo->bpp, 8); 564 565 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 566 fsize->stepwise.min_width = CAL_MIN_WIDTH_BYTES * 8 / bpp; 567 fsize->stepwise.max_width = CAL_MAX_WIDTH_BYTES * 8 / bpp; 568 fsize->stepwise.step_width = 64 / bpp; 569 fsize->stepwise.min_height = CAL_MIN_HEIGHT_LINES; 570 fsize->stepwise.max_height = CAL_MAX_HEIGHT_LINES; 571 fsize->stepwise.step_height = 1; 572 573 return 0; 574 } 575 576 static const struct v4l2_ioctl_ops cal_ioctl_mc_ops = { 577 .vidioc_querycap = cal_querycap, 578 .vidioc_enum_fmt_vid_cap = cal_mc_enum_fmt_vid_cap, 579 .vidioc_g_fmt_vid_cap = cal_g_fmt_vid_cap, 580 .vidioc_try_fmt_vid_cap = cal_mc_try_fmt_vid_cap, 581 .vidioc_s_fmt_vid_cap = cal_mc_s_fmt_vid_cap, 582 .vidioc_enum_framesizes = cal_mc_enum_framesizes, 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 .vidioc_log_status = v4l2_ctrl_log_status, 593 }; 594 595 /* ------------------------------------------------------------------ 596 * videobuf2 Common Operations 597 * ------------------------------------------------------------------ 598 */ 599 600 static int cal_queue_setup(struct vb2_queue *vq, 601 unsigned int *nbuffers, unsigned int *nplanes, 602 unsigned int sizes[], struct device *alloc_devs[]) 603 { 604 struct cal_ctx *ctx = vb2_get_drv_priv(vq); 605 unsigned int size = ctx->v_fmt.fmt.pix.sizeimage; 606 607 if (vq->num_buffers + *nbuffers < 3) 608 *nbuffers = 3 - vq->num_buffers; 609 610 if (*nplanes) { 611 if (sizes[0] < size) 612 return -EINVAL; 613 size = sizes[0]; 614 } 615 616 *nplanes = 1; 617 sizes[0] = size; 618 619 ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]); 620 621 return 0; 622 } 623 624 static int cal_buffer_prepare(struct vb2_buffer *vb) 625 { 626 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 627 struct cal_buffer *buf = container_of(vb, struct cal_buffer, 628 vb.vb2_buf); 629 unsigned long size; 630 631 size = ctx->v_fmt.fmt.pix.sizeimage; 632 if (vb2_plane_size(vb, 0) < size) { 633 ctx_err(ctx, 634 "data will not fit into plane (%lu < %lu)\n", 635 vb2_plane_size(vb, 0), size); 636 return -EINVAL; 637 } 638 639 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); 640 return 0; 641 } 642 643 static void cal_buffer_queue(struct vb2_buffer *vb) 644 { 645 struct cal_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 646 struct cal_buffer *buf = container_of(vb, struct cal_buffer, 647 vb.vb2_buf); 648 unsigned long flags; 649 650 /* recheck locking */ 651 spin_lock_irqsave(&ctx->dma.lock, flags); 652 list_add_tail(&buf->list, &ctx->dma.queue); 653 spin_unlock_irqrestore(&ctx->dma.lock, flags); 654 } 655 656 static void cal_release_buffers(struct cal_ctx *ctx, 657 enum vb2_buffer_state state) 658 { 659 struct cal_buffer *buf, *tmp; 660 661 /* Release all queued buffers. */ 662 spin_lock_irq(&ctx->dma.lock); 663 664 list_for_each_entry_safe(buf, tmp, &ctx->dma.queue, list) { 665 list_del(&buf->list); 666 vb2_buffer_done(&buf->vb.vb2_buf, state); 667 } 668 669 if (ctx->dma.pending) { 670 vb2_buffer_done(&ctx->dma.pending->vb.vb2_buf, state); 671 ctx->dma.pending = NULL; 672 } 673 674 if (ctx->dma.active) { 675 vb2_buffer_done(&ctx->dma.active->vb.vb2_buf, state); 676 ctx->dma.active = NULL; 677 } 678 679 spin_unlock_irq(&ctx->dma.lock); 680 } 681 682 /* ------------------------------------------------------------------ 683 * videobuf2 Operations 684 * ------------------------------------------------------------------ 685 */ 686 687 static int cal_video_check_format(struct cal_ctx *ctx) 688 { 689 const struct v4l2_mbus_framefmt *format; 690 struct media_pad *remote_pad; 691 692 remote_pad = media_entity_remote_pad(&ctx->pad); 693 if (!remote_pad) 694 return -ENODEV; 695 696 format = &ctx->phy->formats[remote_pad->index]; 697 698 if (ctx->fmtinfo->code != format->code || 699 ctx->v_fmt.fmt.pix.height != format->height || 700 ctx->v_fmt.fmt.pix.width != format->width || 701 ctx->v_fmt.fmt.pix.field != format->field) 702 return -EPIPE; 703 704 return 0; 705 } 706 707 static int cal_start_streaming(struct vb2_queue *vq, unsigned int count) 708 { 709 struct cal_ctx *ctx = vb2_get_drv_priv(vq); 710 struct cal_buffer *buf; 711 dma_addr_t addr; 712 int ret; 713 714 ret = media_pipeline_start(&ctx->vdev.entity, &ctx->phy->pipe); 715 if (ret < 0) { 716 ctx_err(ctx, "Failed to start media pipeline: %d\n", ret); 717 goto error_release_buffers; 718 } 719 720 /* 721 * Verify that the currently configured format matches the output of 722 * the connected CAMERARX. 723 */ 724 ret = cal_video_check_format(ctx); 725 if (ret < 0) { 726 ctx_dbg(3, ctx, 727 "Format mismatch between CAMERARX and video node\n"); 728 goto error_pipeline; 729 } 730 731 ret = cal_ctx_prepare(ctx); 732 if (ret) { 733 ctx_err(ctx, "Failed to prepare context: %d\n", ret); 734 goto error_pipeline; 735 } 736 737 spin_lock_irq(&ctx->dma.lock); 738 buf = list_first_entry(&ctx->dma.queue, struct cal_buffer, list); 739 ctx->dma.active = buf; 740 list_del(&buf->list); 741 spin_unlock_irq(&ctx->dma.lock); 742 743 addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); 744 745 ret = pm_runtime_resume_and_get(ctx->cal->dev); 746 if (ret < 0) 747 goto error_pipeline; 748 749 cal_ctx_set_dma_addr(ctx, addr); 750 cal_ctx_start(ctx); 751 752 ret = v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 1); 753 if (ret) 754 goto error_stop; 755 756 if (cal_debug >= 4) 757 cal_quickdump_regs(ctx->cal); 758 759 return 0; 760 761 error_stop: 762 cal_ctx_stop(ctx); 763 pm_runtime_put_sync(ctx->cal->dev); 764 cal_ctx_unprepare(ctx); 765 766 error_pipeline: 767 media_pipeline_stop(&ctx->vdev.entity); 768 error_release_buffers: 769 cal_release_buffers(ctx, VB2_BUF_STATE_QUEUED); 770 771 return ret; 772 } 773 774 static void cal_stop_streaming(struct vb2_queue *vq) 775 { 776 struct cal_ctx *ctx = vb2_get_drv_priv(vq); 777 778 cal_ctx_stop(ctx); 779 780 v4l2_subdev_call(&ctx->phy->subdev, video, s_stream, 0); 781 782 pm_runtime_put_sync(ctx->cal->dev); 783 784 cal_ctx_unprepare(ctx); 785 786 cal_release_buffers(ctx, VB2_BUF_STATE_ERROR); 787 788 media_pipeline_stop(&ctx->vdev.entity); 789 } 790 791 static const struct vb2_ops cal_video_qops = { 792 .queue_setup = cal_queue_setup, 793 .buf_prepare = cal_buffer_prepare, 794 .buf_queue = cal_buffer_queue, 795 .start_streaming = cal_start_streaming, 796 .stop_streaming = cal_stop_streaming, 797 .wait_prepare = vb2_ops_wait_prepare, 798 .wait_finish = vb2_ops_wait_finish, 799 }; 800 801 /* ------------------------------------------------------------------ 802 * V4L2 Initialization and Registration 803 * ------------------------------------------------------------------ 804 */ 805 806 static const struct v4l2_file_operations cal_fops = { 807 .owner = THIS_MODULE, 808 .open = v4l2_fh_open, 809 .release = vb2_fop_release, 810 .poll = vb2_fop_poll, 811 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ 812 .mmap = vb2_fop_mmap, 813 }; 814 815 static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx) 816 { 817 struct v4l2_subdev_mbus_code_enum mbus_code; 818 struct v4l2_mbus_framefmt mbus_fmt; 819 const struct cal_format_info *fmtinfo; 820 unsigned int i, j, k; 821 int ret = 0; 822 823 /* Enumerate sub device formats and enable all matching local formats */ 824 ctx->active_fmt = devm_kcalloc(ctx->cal->dev, cal_num_formats, 825 sizeof(*ctx->active_fmt), GFP_KERNEL); 826 if (!ctx->active_fmt) 827 return -ENOMEM; 828 829 ctx->num_active_fmt = 0; 830 831 for (j = 0, i = 0; ; ++j) { 832 833 memset(&mbus_code, 0, sizeof(mbus_code)); 834 mbus_code.index = j; 835 mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; 836 ret = v4l2_subdev_call(ctx->phy->source, pad, enum_mbus_code, 837 NULL, &mbus_code); 838 if (ret == -EINVAL) 839 break; 840 841 if (ret) { 842 ctx_err(ctx, "Error enumerating mbus codes in subdev %s: %d\n", 843 ctx->phy->source->name, ret); 844 return ret; 845 } 846 847 ctx_dbg(2, ctx, 848 "subdev %s: code: %04x idx: %u\n", 849 ctx->phy->source->name, mbus_code.code, j); 850 851 for (k = 0; k < cal_num_formats; k++) { 852 fmtinfo = &cal_formats[k]; 853 854 if (mbus_code.code == fmtinfo->code) { 855 ctx->active_fmt[i] = fmtinfo; 856 ctx_dbg(2, ctx, 857 "matched fourcc: %s: code: %04x idx: %u\n", 858 fourcc_to_str(fmtinfo->fourcc), 859 fmtinfo->code, i); 860 ctx->num_active_fmt = ++i; 861 } 862 } 863 } 864 865 if (i == 0) { 866 ctx_err(ctx, "No suitable format reported by subdev %s\n", 867 ctx->phy->source->name); 868 return -EINVAL; 869 } 870 871 ret = __subdev_get_format(ctx, &mbus_fmt); 872 if (ret) 873 return ret; 874 875 fmtinfo = find_format_by_code(ctx, mbus_fmt.code); 876 if (!fmtinfo) { 877 ctx_dbg(3, ctx, "mbus code format (0x%08x) not found.\n", 878 mbus_fmt.code); 879 return -EINVAL; 880 } 881 882 /* Save current format */ 883 v4l2_fill_pix_format(&ctx->v_fmt.fmt.pix, &mbus_fmt); 884 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 885 ctx->v_fmt.fmt.pix.pixelformat = fmtinfo->fourcc; 886 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); 887 ctx->fmtinfo = fmtinfo; 888 889 return 0; 890 } 891 892 static int cal_ctx_v4l2_init_mc_format(struct cal_ctx *ctx) 893 { 894 const struct cal_format_info *fmtinfo; 895 struct v4l2_pix_format *pix_fmt = &ctx->v_fmt.fmt.pix; 896 897 fmtinfo = cal_format_by_code(MEDIA_BUS_FMT_UYVY8_2X8); 898 if (!fmtinfo) 899 return -EINVAL; 900 901 pix_fmt->width = 640; 902 pix_fmt->height = 480; 903 pix_fmt->field = V4L2_FIELD_NONE; 904 pix_fmt->colorspace = V4L2_COLORSPACE_SRGB; 905 pix_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601; 906 pix_fmt->quantization = V4L2_QUANTIZATION_LIM_RANGE; 907 pix_fmt->xfer_func = V4L2_XFER_FUNC_SRGB; 908 pix_fmt->pixelformat = fmtinfo->fourcc; 909 910 ctx->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 911 912 /* Save current format */ 913 cal_calc_format_size(ctx, fmtinfo, &ctx->v_fmt); 914 ctx->fmtinfo = fmtinfo; 915 916 return 0; 917 } 918 919 int cal_ctx_v4l2_register(struct cal_ctx *ctx) 920 { 921 struct video_device *vfd = &ctx->vdev; 922 int ret; 923 924 if (!cal_mc_api) { 925 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; 926 927 ret = cal_ctx_v4l2_init_formats(ctx); 928 if (ret) { 929 ctx_err(ctx, "Failed to init formats: %d\n", ret); 930 return ret; 931 } 932 933 ret = v4l2_ctrl_add_handler(hdl, ctx->phy->source->ctrl_handler, 934 NULL, true); 935 if (ret < 0) { 936 ctx_err(ctx, "Failed to add source ctrl handler\n"); 937 return ret; 938 } 939 } else { 940 ret = cal_ctx_v4l2_init_mc_format(ctx); 941 if (ret) { 942 ctx_err(ctx, "Failed to init format: %d\n", ret); 943 return ret; 944 } 945 } 946 947 ret = video_register_device(vfd, VFL_TYPE_VIDEO, cal_video_nr); 948 if (ret < 0) { 949 ctx_err(ctx, "Failed to register video device\n"); 950 return ret; 951 } 952 953 ret = media_create_pad_link(&ctx->phy->subdev.entity, 954 CAL_CAMERARX_PAD_FIRST_SOURCE, 955 &vfd->entity, 0, 956 MEDIA_LNK_FL_IMMUTABLE | 957 MEDIA_LNK_FL_ENABLED); 958 if (ret) { 959 ctx_err(ctx, "Failed to create media link for context %u\n", 960 ctx->dma_ctx); 961 video_unregister_device(vfd); 962 return ret; 963 } 964 965 ctx_info(ctx, "V4L2 device registered as %s\n", 966 video_device_node_name(vfd)); 967 968 return 0; 969 } 970 971 void cal_ctx_v4l2_unregister(struct cal_ctx *ctx) 972 { 973 ctx_dbg(1, ctx, "unregistering %s\n", 974 video_device_node_name(&ctx->vdev)); 975 976 video_unregister_device(&ctx->vdev); 977 } 978 979 int cal_ctx_v4l2_init(struct cal_ctx *ctx) 980 { 981 struct video_device *vfd = &ctx->vdev; 982 struct vb2_queue *q = &ctx->vb_vidq; 983 int ret; 984 985 INIT_LIST_HEAD(&ctx->dma.queue); 986 spin_lock_init(&ctx->dma.lock); 987 mutex_init(&ctx->mutex); 988 init_waitqueue_head(&ctx->dma.wait); 989 990 /* Initialize the vb2 queue. */ 991 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 992 q->io_modes = VB2_MMAP | VB2_DMABUF; 993 q->drv_priv = ctx; 994 q->buf_struct_size = sizeof(struct cal_buffer); 995 q->ops = &cal_video_qops; 996 q->mem_ops = &vb2_dma_contig_memops; 997 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 998 q->lock = &ctx->mutex; 999 q->min_buffers_needed = 3; 1000 q->dev = ctx->cal->dev; 1001 1002 ret = vb2_queue_init(q); 1003 if (ret) 1004 return ret; 1005 1006 /* Initialize the video device and media entity. */ 1007 vfd->fops = &cal_fops; 1008 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING 1009 | (cal_mc_api ? V4L2_CAP_IO_MC : 0); 1010 vfd->v4l2_dev = &ctx->cal->v4l2_dev; 1011 vfd->queue = q; 1012 snprintf(vfd->name, sizeof(vfd->name), "CAL output %u", ctx->dma_ctx); 1013 vfd->release = video_device_release_empty; 1014 vfd->ioctl_ops = cal_mc_api ? &cal_ioctl_mc_ops : &cal_ioctl_legacy_ops; 1015 vfd->lock = &ctx->mutex; 1016 video_set_drvdata(vfd, ctx); 1017 1018 ctx->pad.flags = MEDIA_PAD_FL_SINK; 1019 ret = media_entity_pads_init(&vfd->entity, 1, &ctx->pad); 1020 if (ret < 0) 1021 return ret; 1022 1023 if (!cal_mc_api) { 1024 /* Initialize the control handler. */ 1025 struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler; 1026 1027 ret = v4l2_ctrl_handler_init(hdl, 11); 1028 if (ret < 0) { 1029 ctx_err(ctx, "Failed to init ctrl handler\n"); 1030 goto error; 1031 } 1032 1033 vfd->ctrl_handler = hdl; 1034 } 1035 1036 return 0; 1037 1038 error: 1039 media_entity_cleanup(&vfd->entity); 1040 return ret; 1041 } 1042 1043 void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx) 1044 { 1045 if (!cal_mc_api) 1046 v4l2_ctrl_handler_free(&ctx->ctrl_handler); 1047 1048 media_entity_cleanup(&ctx->vdev.entity); 1049 } 1050