1/* 2 * vivid-vid-common.c - common video support functions. 3 * 4 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. 5 * 6 * This program is free software; you may redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; version 2 of the License. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 11 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 12 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 13 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 14 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 15 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 16 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 17 * SOFTWARE. 18 */ 19 20#include <linux/errno.h> 21#include <linux/kernel.h> 22#include <linux/sched.h> 23#include <linux/videodev2.h> 24#include <linux/v4l2-dv-timings.h> 25#include <media/v4l2-common.h> 26#include <media/v4l2-event.h> 27#include <media/v4l2-dv-timings.h> 28 29#include "vivid-core.h" 30#include "vivid-vid-common.h" 31 32const struct v4l2_dv_timings_cap vivid_dv_timings_cap = { 33 .type = V4L2_DV_BT_656_1120, 34 /* keep this initialization for compatibility with GCC < 4.4.6 */ 35 .reserved = { 0 }, 36 V4L2_INIT_BT_TIMINGS(0, MAX_WIDTH, 0, MAX_HEIGHT, 25000000, 600000000, 37 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT, 38 V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_INTERLACED) 39}; 40 41/* ------------------------------------------------------------------ 42 Basic structures 43 ------------------------------------------------------------------*/ 44 45struct vivid_fmt vivid_formats[] = { 46 { 47 .name = "4:2:2, packed, YUYV", 48 .fourcc = V4L2_PIX_FMT_YUYV, 49 .depth = 16, 50 .is_yuv = true, 51 .planes = 1, 52 .data_offset = { PLANE0_DATA_OFFSET, 0 }, 53 }, 54 { 55 .name = "4:2:2, packed, UYVY", 56 .fourcc = V4L2_PIX_FMT_UYVY, 57 .depth = 16, 58 .is_yuv = true, 59 .planes = 1, 60 }, 61 { 62 .name = "4:2:2, packed, YVYU", 63 .fourcc = V4L2_PIX_FMT_YVYU, 64 .depth = 16, 65 .is_yuv = true, 66 .planes = 1, 67 }, 68 { 69 .name = "4:2:2, packed, VYUY", 70 .fourcc = V4L2_PIX_FMT_VYUY, 71 .depth = 16, 72 .is_yuv = true, 73 .planes = 1, 74 }, 75 { 76 .name = "RGB565 (LE)", 77 .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */ 78 .depth = 16, 79 .planes = 1, 80 .can_do_overlay = true, 81 }, 82 { 83 .name = "RGB565 (BE)", 84 .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ 85 .depth = 16, 86 .planes = 1, 87 .can_do_overlay = true, 88 }, 89 { 90 .name = "RGB555 (LE)", 91 .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */ 92 .depth = 16, 93 .planes = 1, 94 .can_do_overlay = true, 95 }, 96 { 97 .name = "XRGB555 (LE)", 98 .fourcc = V4L2_PIX_FMT_XRGB555, /* gggbbbbb arrrrrgg */ 99 .depth = 16, 100 .planes = 1, 101 .can_do_overlay = true, 102 }, 103 { 104 .name = "ARGB555 (LE)", 105 .fourcc = V4L2_PIX_FMT_ARGB555, /* gggbbbbb arrrrrgg */ 106 .depth = 16, 107 .planes = 1, 108 .can_do_overlay = true, 109 .alpha_mask = 0x8000, 110 }, 111 { 112 .name = "RGB555 (BE)", 113 .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */ 114 .depth = 16, 115 .planes = 1, 116 .can_do_overlay = true, 117 }, 118 { 119 .name = "RGB24 (LE)", 120 .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */ 121 .depth = 24, 122 .planes = 1, 123 }, 124 { 125 .name = "RGB24 (BE)", 126 .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */ 127 .depth = 24, 128 .planes = 1, 129 }, 130 { 131 .name = "RGB32 (LE)", 132 .fourcc = V4L2_PIX_FMT_RGB32, /* argb */ 133 .depth = 32, 134 .planes = 1, 135 }, 136 { 137 .name = "RGB32 (BE)", 138 .fourcc = V4L2_PIX_FMT_BGR32, /* bgra */ 139 .depth = 32, 140 .planes = 1, 141 }, 142 { 143 .name = "XRGB32 (LE)", 144 .fourcc = V4L2_PIX_FMT_XRGB32, /* argb */ 145 .depth = 32, 146 .planes = 1, 147 }, 148 { 149 .name = "XRGB32 (BE)", 150 .fourcc = V4L2_PIX_FMT_XBGR32, /* bgra */ 151 .depth = 32, 152 .planes = 1, 153 }, 154 { 155 .name = "ARGB32 (LE)", 156 .fourcc = V4L2_PIX_FMT_ARGB32, /* argb */ 157 .depth = 32, 158 .planes = 1, 159 .alpha_mask = 0x000000ff, 160 }, 161 { 162 .name = "ARGB32 (BE)", 163 .fourcc = V4L2_PIX_FMT_ABGR32, /* bgra */ 164 .depth = 32, 165 .planes = 1, 166 .alpha_mask = 0xff000000, 167 }, 168 { 169 .name = "4:2:2, planar, YUV", 170 .fourcc = V4L2_PIX_FMT_NV16M, 171 .depth = 8, 172 .is_yuv = true, 173 .planes = 2, 174 .data_offset = { PLANE0_DATA_OFFSET, 0 }, 175 }, 176 { 177 .name = "4:2:2, planar, YVU", 178 .fourcc = V4L2_PIX_FMT_NV61M, 179 .depth = 8, 180 .is_yuv = true, 181 .planes = 2, 182 .data_offset = { 0, PLANE0_DATA_OFFSET }, 183 }, 184}; 185 186/* There are 2 multiplanar formats in the list */ 187#define VIVID_MPLANAR_FORMATS 2 188 189const struct vivid_fmt *vivid_get_format(struct vivid_dev *dev, u32 pixelformat) 190{ 191 const struct vivid_fmt *fmt; 192 unsigned k; 193 194 for (k = 0; k < ARRAY_SIZE(vivid_formats); k++) { 195 fmt = &vivid_formats[k]; 196 if (fmt->fourcc == pixelformat) 197 if (fmt->planes == 1 || dev->multiplanar) 198 return fmt; 199 } 200 201 return NULL; 202} 203 204bool vivid_vid_can_loop(struct vivid_dev *dev) 205{ 206 if (dev->src_rect.width != dev->sink_rect.width || 207 dev->src_rect.height != dev->sink_rect.height) 208 return false; 209 if (dev->fmt_cap->fourcc != dev->fmt_out->fourcc) 210 return false; 211 if (dev->field_cap != dev->field_out) 212 return false; 213 if (vivid_is_svid_cap(dev) && vivid_is_svid_out(dev)) { 214 if (!(dev->std_cap & V4L2_STD_525_60) != 215 !(dev->std_out & V4L2_STD_525_60)) 216 return false; 217 return true; 218 } 219 if (vivid_is_hdmi_cap(dev) && vivid_is_hdmi_out(dev)) 220 return true; 221 return false; 222} 223 224void vivid_send_source_change(struct vivid_dev *dev, unsigned type) 225{ 226 struct v4l2_event ev = { 227 .type = V4L2_EVENT_SOURCE_CHANGE, 228 .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION, 229 }; 230 unsigned i; 231 232 for (i = 0; i < dev->num_inputs; i++) { 233 ev.id = i; 234 if (dev->input_type[i] == type) { 235 if (video_is_registered(&dev->vid_cap_dev) && dev->has_vid_cap) 236 v4l2_event_queue(&dev->vid_cap_dev, &ev); 237 if (video_is_registered(&dev->vbi_cap_dev) && dev->has_vbi_cap) 238 v4l2_event_queue(&dev->vbi_cap_dev, &ev); 239 } 240 } 241} 242 243/* 244 * Conversion function that converts a single-planar format to a 245 * single-plane multiplanar format. 246 */ 247void fmt_sp2mp(const struct v4l2_format *sp_fmt, struct v4l2_format *mp_fmt) 248{ 249 struct v4l2_pix_format_mplane *mp = &mp_fmt->fmt.pix_mp; 250 struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0]; 251 const struct v4l2_pix_format *pix = &sp_fmt->fmt.pix; 252 bool is_out = sp_fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT; 253 254 memset(mp->reserved, 0, sizeof(mp->reserved)); 255 mp_fmt->type = is_out ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE : 256 V4L2_CAP_VIDEO_CAPTURE_MPLANE; 257 mp->width = pix->width; 258 mp->height = pix->height; 259 mp->pixelformat = pix->pixelformat; 260 mp->field = pix->field; 261 mp->colorspace = pix->colorspace; 262 mp->num_planes = 1; 263 mp->flags = pix->flags; 264 ppix->sizeimage = pix->sizeimage; 265 ppix->bytesperline = pix->bytesperline; 266 memset(ppix->reserved, 0, sizeof(ppix->reserved)); 267} 268 269int fmt_sp2mp_func(struct file *file, void *priv, 270 struct v4l2_format *f, fmtfunc func) 271{ 272 struct v4l2_format fmt; 273 struct v4l2_pix_format_mplane *mp = &fmt.fmt.pix_mp; 274 struct v4l2_plane_pix_format *ppix = &mp->plane_fmt[0]; 275 struct v4l2_pix_format *pix = &f->fmt.pix; 276 int ret; 277 278 /* Converts to a mplane format */ 279 fmt_sp2mp(f, &fmt); 280 /* Passes it to the generic mplane format function */ 281 ret = func(file, priv, &fmt); 282 /* Copies back the mplane data to the single plane format */ 283 pix->width = mp->width; 284 pix->height = mp->height; 285 pix->pixelformat = mp->pixelformat; 286 pix->field = mp->field; 287 pix->colorspace = mp->colorspace; 288 pix->sizeimage = ppix->sizeimage; 289 pix->bytesperline = ppix->bytesperline; 290 pix->flags = mp->flags; 291 return ret; 292} 293 294/* v4l2_rect helper function: copy the width/height values */ 295void rect_set_size_to(struct v4l2_rect *r, const struct v4l2_rect *size) 296{ 297 r->width = size->width; 298 r->height = size->height; 299} 300 301/* v4l2_rect helper function: width and height of r should be >= min_size */ 302void rect_set_min_size(struct v4l2_rect *r, const struct v4l2_rect *min_size) 303{ 304 if (r->width < min_size->width) 305 r->width = min_size->width; 306 if (r->height < min_size->height) 307 r->height = min_size->height; 308} 309 310/* v4l2_rect helper function: width and height of r should be <= max_size */ 311void rect_set_max_size(struct v4l2_rect *r, const struct v4l2_rect *max_size) 312{ 313 if (r->width > max_size->width) 314 r->width = max_size->width; 315 if (r->height > max_size->height) 316 r->height = max_size->height; 317} 318 319/* v4l2_rect helper function: r should be inside boundary */ 320void rect_map_inside(struct v4l2_rect *r, const struct v4l2_rect *boundary) 321{ 322 rect_set_max_size(r, boundary); 323 if (r->left < boundary->left) 324 r->left = boundary->left; 325 if (r->top < boundary->top) 326 r->top = boundary->top; 327 if (r->left + r->width > boundary->width) 328 r->left = boundary->width - r->width; 329 if (r->top + r->height > boundary->height) 330 r->top = boundary->height - r->height; 331} 332 333/* v4l2_rect helper function: return true if r1 has the same size as r2 */ 334bool rect_same_size(const struct v4l2_rect *r1, const struct v4l2_rect *r2) 335{ 336 return r1->width == r2->width && r1->height == r2->height; 337} 338 339/* v4l2_rect helper function: calculate the intersection of two rects */ 340struct v4l2_rect rect_intersect(const struct v4l2_rect *a, const struct v4l2_rect *b) 341{ 342 struct v4l2_rect r; 343 int right, bottom; 344 345 r.top = max(a->top, b->top); 346 r.left = max(a->left, b->left); 347 bottom = min(a->top + a->height, b->top + b->height); 348 right = min(a->left + a->width, b->left + b->width); 349 r.height = max(0, bottom - r.top); 350 r.width = max(0, right - r.left); 351 return r; 352} 353 354/* 355 * v4l2_rect helper function: scale rect r by to->width / from->width and 356 * to->height / from->height. 357 */ 358void rect_scale(struct v4l2_rect *r, const struct v4l2_rect *from, 359 const struct v4l2_rect *to) 360{ 361 if (from->width == 0 || from->height == 0) { 362 r->left = r->top = r->width = r->height = 0; 363 return; 364 } 365 r->left = (((r->left - from->left) * to->width) / from->width) & ~1; 366 r->width = ((r->width * to->width) / from->width) & ~1; 367 r->top = ((r->top - from->top) * to->height) / from->height; 368 r->height = (r->height * to->height) / from->height; 369} 370 371bool rect_overlap(const struct v4l2_rect *r1, const struct v4l2_rect *r2) 372{ 373 /* 374 * IF the left side of r1 is to the right of the right side of r2 OR 375 * the left side of r2 is to the right of the right side of r1 THEN 376 * they do not overlap. 377 */ 378 if (r1->left >= r2->left + r2->width || 379 r2->left >= r1->left + r1->width) 380 return false; 381 /* 382 * IF the top side of r1 is below the bottom of r2 OR 383 * the top side of r2 is below the bottom of r1 THEN 384 * they do not overlap. 385 */ 386 if (r1->top >= r2->top + r2->height || 387 r2->top >= r1->top + r1->height) 388 return false; 389 return true; 390} 391int vivid_vid_adjust_sel(unsigned flags, struct v4l2_rect *r) 392{ 393 unsigned w = r->width; 394 unsigned h = r->height; 395 396 if (!(flags & V4L2_SEL_FLAG_LE)) { 397 w++; 398 h++; 399 if (w < 2) 400 w = 2; 401 if (h < 2) 402 h = 2; 403 } 404 if (!(flags & V4L2_SEL_FLAG_GE)) { 405 if (w > MAX_WIDTH) 406 w = MAX_WIDTH; 407 if (h > MAX_HEIGHT) 408 h = MAX_HEIGHT; 409 } 410 w = w & ~1; 411 h = h & ~1; 412 if (w < 2 || h < 2) 413 return -ERANGE; 414 if (w > MAX_WIDTH || h > MAX_HEIGHT) 415 return -ERANGE; 416 if (r->top < 0) 417 r->top = 0; 418 if (r->left < 0) 419 r->left = 0; 420 r->left &= ~1; 421 r->top &= ~1; 422 if (r->left + w > MAX_WIDTH) 423 r->left = MAX_WIDTH - w; 424 if (r->top + h > MAX_HEIGHT) 425 r->top = MAX_HEIGHT - h; 426 if ((flags & (V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE)) == 427 (V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE) && 428 (r->width != w || r->height != h)) 429 return -ERANGE; 430 r->width = w; 431 r->height = h; 432 return 0; 433} 434 435int vivid_enum_fmt_vid(struct file *file, void *priv, 436 struct v4l2_fmtdesc *f) 437{ 438 struct vivid_dev *dev = video_drvdata(file); 439 const struct vivid_fmt *fmt; 440 441 if (f->index >= ARRAY_SIZE(vivid_formats) - 442 (dev->multiplanar ? 0 : VIVID_MPLANAR_FORMATS)) 443 return -EINVAL; 444 445 fmt = &vivid_formats[f->index]; 446 447 strlcpy(f->description, fmt->name, sizeof(f->description)); 448 f->pixelformat = fmt->fourcc; 449 return 0; 450} 451 452int vidioc_enum_fmt_vid_mplane(struct file *file, void *priv, 453 struct v4l2_fmtdesc *f) 454{ 455 struct vivid_dev *dev = video_drvdata(file); 456 457 if (!dev->multiplanar) 458 return -ENOTTY; 459 return vivid_enum_fmt_vid(file, priv, f); 460} 461 462int vidioc_enum_fmt_vid(struct file *file, void *priv, 463 struct v4l2_fmtdesc *f) 464{ 465 struct vivid_dev *dev = video_drvdata(file); 466 467 if (dev->multiplanar) 468 return -ENOTTY; 469 return vivid_enum_fmt_vid(file, priv, f); 470} 471 472int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) 473{ 474 struct vivid_dev *dev = video_drvdata(file); 475 struct video_device *vdev = video_devdata(file); 476 477 if (vdev->vfl_dir == VFL_DIR_RX) { 478 if (!vivid_is_sdtv_cap(dev)) 479 return -ENODATA; 480 *id = dev->std_cap; 481 } else { 482 if (!vivid_is_svid_out(dev)) 483 return -ENODATA; 484 *id = dev->std_out; 485 } 486 return 0; 487} 488 489int vidioc_g_dv_timings(struct file *file, void *_fh, 490 struct v4l2_dv_timings *timings) 491{ 492 struct vivid_dev *dev = video_drvdata(file); 493 struct video_device *vdev = video_devdata(file); 494 495 if (vdev->vfl_dir == VFL_DIR_RX) { 496 if (!vivid_is_hdmi_cap(dev)) 497 return -ENODATA; 498 *timings = dev->dv_timings_cap; 499 } else { 500 if (!vivid_is_hdmi_out(dev)) 501 return -ENODATA; 502 *timings = dev->dv_timings_out; 503 } 504 return 0; 505} 506 507int vidioc_enum_dv_timings(struct file *file, void *_fh, 508 struct v4l2_enum_dv_timings *timings) 509{ 510 struct vivid_dev *dev = video_drvdata(file); 511 struct video_device *vdev = video_devdata(file); 512 513 if (vdev->vfl_dir == VFL_DIR_RX) { 514 if (!vivid_is_hdmi_cap(dev)) 515 return -ENODATA; 516 } else { 517 if (!vivid_is_hdmi_out(dev)) 518 return -ENODATA; 519 } 520 return v4l2_enum_dv_timings_cap(timings, &vivid_dv_timings_cap, 521 NULL, NULL); 522} 523 524int vidioc_dv_timings_cap(struct file *file, void *_fh, 525 struct v4l2_dv_timings_cap *cap) 526{ 527 struct vivid_dev *dev = video_drvdata(file); 528 struct video_device *vdev = video_devdata(file); 529 530 if (vdev->vfl_dir == VFL_DIR_RX) { 531 if (!vivid_is_hdmi_cap(dev)) 532 return -ENODATA; 533 } else { 534 if (!vivid_is_hdmi_out(dev)) 535 return -ENODATA; 536 } 537 *cap = vivid_dv_timings_cap; 538 return 0; 539} 540 541int vidioc_g_edid(struct file *file, void *_fh, 542 struct v4l2_edid *edid) 543{ 544 struct vivid_dev *dev = video_drvdata(file); 545 struct video_device *vdev = video_devdata(file); 546 547 memset(edid->reserved, 0, sizeof(edid->reserved)); 548 if (vdev->vfl_dir == VFL_DIR_RX) { 549 if (edid->pad >= dev->num_inputs) 550 return -EINVAL; 551 if (dev->input_type[edid->pad] != HDMI) 552 return -EINVAL; 553 } else { 554 if (edid->pad >= dev->num_outputs) 555 return -EINVAL; 556 if (dev->output_type[edid->pad] != HDMI) 557 return -EINVAL; 558 } 559 if (edid->start_block == 0 && edid->blocks == 0) { 560 edid->blocks = dev->edid_blocks; 561 return 0; 562 } 563 if (dev->edid_blocks == 0) 564 return -ENODATA; 565 if (edid->start_block >= dev->edid_blocks) 566 return -EINVAL; 567 if (edid->start_block + edid->blocks > dev->edid_blocks) 568 edid->blocks = dev->edid_blocks - edid->start_block; 569 memcpy(edid->edid, dev->edid, edid->blocks * 128); 570 return 0; 571} 572