1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 V4L2 controls framework implementation. 4 5 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl> 6 7 */ 8 9#define pr_fmt(fmt) "v4l2-ctrls: " fmt 10 11#include <linux/ctype.h> 12#include <linux/export.h> 13#include <linux/mm.h> 14#include <linux/slab.h> 15#include <media/v4l2-ctrls.h> 16#include <media/v4l2-dev.h> 17#include <media/v4l2-device.h> 18#include <media/v4l2-event.h> 19#include <media/v4l2-fwnode.h> 20#include <media/v4l2-ioctl.h> 21 22#define dprintk(vdev, fmt, arg...) do { \ 23 if (!WARN_ON(!(vdev)) && ((vdev)->dev_debug & V4L2_DEV_DEBUG_CTRL)) \ 24 printk(KERN_DEBUG pr_fmt("%s: %s: " fmt), \ 25 __func__, video_device_node_name(vdev), ##arg); \ 26} while (0) 27 28#define has_op(master, op) \ 29 (master->ops && master->ops->op) 30#define call_op(master, op) \ 31 (has_op(master, op) ? master->ops->op(master) : 0) 32 33static const union v4l2_ctrl_ptr ptr_null; 34 35/* Internal temporary helper struct, one for each v4l2_ext_control */ 36struct v4l2_ctrl_helper { 37 /* Pointer to the control reference of the master control */ 38 struct v4l2_ctrl_ref *mref; 39 /* The control ref corresponding to the v4l2_ext_control ID field. */ 40 struct v4l2_ctrl_ref *ref; 41 /* v4l2_ext_control index of the next control belonging to the 42 same cluster, or 0 if there isn't any. */ 43 u32 next; 44}; 45 46/* Small helper function to determine if the autocluster is set to manual 47 mode. */ 48static bool is_cur_manual(const struct v4l2_ctrl *master) 49{ 50 return master->is_auto && master->cur.val == master->manual_mode_value; 51} 52 53/* Same as above, but this checks the against the new value instead of the 54 current value. */ 55static bool is_new_manual(const struct v4l2_ctrl *master) 56{ 57 return master->is_auto && master->val == master->manual_mode_value; 58} 59 60/* Returns NULL or a character pointer array containing the menu for 61 the given control ID. The pointer array ends with a NULL pointer. 62 An empty string signifies a menu entry that is invalid. This allows 63 drivers to disable certain options if it is not supported. */ 64const char * const *v4l2_ctrl_get_menu(u32 id) 65{ 66 static const char * const mpeg_audio_sampling_freq[] = { 67 "44.1 kHz", 68 "48 kHz", 69 "32 kHz", 70 NULL 71 }; 72 static const char * const mpeg_audio_encoding[] = { 73 "MPEG-1/2 Layer I", 74 "MPEG-1/2 Layer II", 75 "MPEG-1/2 Layer III", 76 "MPEG-2/4 AAC", 77 "AC-3", 78 NULL 79 }; 80 static const char * const mpeg_audio_l1_bitrate[] = { 81 "32 kbps", 82 "64 kbps", 83 "96 kbps", 84 "128 kbps", 85 "160 kbps", 86 "192 kbps", 87 "224 kbps", 88 "256 kbps", 89 "288 kbps", 90 "320 kbps", 91 "352 kbps", 92 "384 kbps", 93 "416 kbps", 94 "448 kbps", 95 NULL 96 }; 97 static const char * const mpeg_audio_l2_bitrate[] = { 98 "32 kbps", 99 "48 kbps", 100 "56 kbps", 101 "64 kbps", 102 "80 kbps", 103 "96 kbps", 104 "112 kbps", 105 "128 kbps", 106 "160 kbps", 107 "192 kbps", 108 "224 kbps", 109 "256 kbps", 110 "320 kbps", 111 "384 kbps", 112 NULL 113 }; 114 static const char * const mpeg_audio_l3_bitrate[] = { 115 "32 kbps", 116 "40 kbps", 117 "48 kbps", 118 "56 kbps", 119 "64 kbps", 120 "80 kbps", 121 "96 kbps", 122 "112 kbps", 123 "128 kbps", 124 "160 kbps", 125 "192 kbps", 126 "224 kbps", 127 "256 kbps", 128 "320 kbps", 129 NULL 130 }; 131 static const char * const mpeg_audio_ac3_bitrate[] = { 132 "32 kbps", 133 "40 kbps", 134 "48 kbps", 135 "56 kbps", 136 "64 kbps", 137 "80 kbps", 138 "96 kbps", 139 "112 kbps", 140 "128 kbps", 141 "160 kbps", 142 "192 kbps", 143 "224 kbps", 144 "256 kbps", 145 "320 kbps", 146 "384 kbps", 147 "448 kbps", 148 "512 kbps", 149 "576 kbps", 150 "640 kbps", 151 NULL 152 }; 153 static const char * const mpeg_audio_mode[] = { 154 "Stereo", 155 "Joint Stereo", 156 "Dual", 157 "Mono", 158 NULL 159 }; 160 static const char * const mpeg_audio_mode_extension[] = { 161 "Bound 4", 162 "Bound 8", 163 "Bound 12", 164 "Bound 16", 165 NULL 166 }; 167 static const char * const mpeg_audio_emphasis[] = { 168 "No Emphasis", 169 "50/15 us", 170 "CCITT J17", 171 NULL 172 }; 173 static const char * const mpeg_audio_crc[] = { 174 "No CRC", 175 "16-bit CRC", 176 NULL 177 }; 178 static const char * const mpeg_audio_dec_playback[] = { 179 "Auto", 180 "Stereo", 181 "Left", 182 "Right", 183 "Mono", 184 "Swapped Stereo", 185 NULL 186 }; 187 static const char * const mpeg_video_encoding[] = { 188 "MPEG-1", 189 "MPEG-2", 190 "MPEG-4 AVC", 191 NULL 192 }; 193 static const char * const mpeg_video_aspect[] = { 194 "1x1", 195 "4x3", 196 "16x9", 197 "2.21x1", 198 NULL 199 }; 200 static const char * const mpeg_video_bitrate_mode[] = { 201 "Variable Bitrate", 202 "Constant Bitrate", 203 "Constant Quality", 204 NULL 205 }; 206 static const char * const mpeg_stream_type[] = { 207 "MPEG-2 Program Stream", 208 "MPEG-2 Transport Stream", 209 "MPEG-1 System Stream", 210 "MPEG-2 DVD-compatible Stream", 211 "MPEG-1 VCD-compatible Stream", 212 "MPEG-2 SVCD-compatible Stream", 213 NULL 214 }; 215 static const char * const mpeg_stream_vbi_fmt[] = { 216 "No VBI", 217 "Private Packet, IVTV Format", 218 NULL 219 }; 220 static const char * const camera_power_line_frequency[] = { 221 "Disabled", 222 "50 Hz", 223 "60 Hz", 224 "Auto", 225 NULL 226 }; 227 static const char * const camera_exposure_auto[] = { 228 "Auto Mode", 229 "Manual Mode", 230 "Shutter Priority Mode", 231 "Aperture Priority Mode", 232 NULL 233 }; 234 static const char * const camera_exposure_metering[] = { 235 "Average", 236 "Center Weighted", 237 "Spot", 238 "Matrix", 239 NULL 240 }; 241 static const char * const camera_auto_focus_range[] = { 242 "Auto", 243 "Normal", 244 "Macro", 245 "Infinity", 246 NULL 247 }; 248 static const char * const colorfx[] = { 249 "None", 250 "Black & White", 251 "Sepia", 252 "Negative", 253 "Emboss", 254 "Sketch", 255 "Sky Blue", 256 "Grass Green", 257 "Skin Whiten", 258 "Vivid", 259 "Aqua", 260 "Art Freeze", 261 "Silhouette", 262 "Solarization", 263 "Antique", 264 "Set Cb/Cr", 265 NULL 266 }; 267 static const char * const auto_n_preset_white_balance[] = { 268 "Manual", 269 "Auto", 270 "Incandescent", 271 "Fluorescent", 272 "Fluorescent H", 273 "Horizon", 274 "Daylight", 275 "Flash", 276 "Cloudy", 277 "Shade", 278 NULL, 279 }; 280 static const char * const camera_iso_sensitivity_auto[] = { 281 "Manual", 282 "Auto", 283 NULL 284 }; 285 static const char * const scene_mode[] = { 286 "None", 287 "Backlight", 288 "Beach/Snow", 289 "Candle Light", 290 "Dusk/Dawn", 291 "Fall Colors", 292 "Fireworks", 293 "Landscape", 294 "Night", 295 "Party/Indoor", 296 "Portrait", 297 "Sports", 298 "Sunset", 299 "Text", 300 NULL 301 }; 302 static const char * const tune_emphasis[] = { 303 "None", 304 "50 Microseconds", 305 "75 Microseconds", 306 NULL, 307 }; 308 static const char * const header_mode[] = { 309 "Separate Buffer", 310 "Joined With 1st Frame", 311 NULL, 312 }; 313 static const char * const multi_slice[] = { 314 "Single", 315 "Max Macroblocks", 316 "Max Bytes", 317 NULL, 318 }; 319 static const char * const entropy_mode[] = { 320 "CAVLC", 321 "CABAC", 322 NULL, 323 }; 324 static const char * const mpeg_h264_level[] = { 325 "1", 326 "1b", 327 "1.1", 328 "1.2", 329 "1.3", 330 "2", 331 "2.1", 332 "2.2", 333 "3", 334 "3.1", 335 "3.2", 336 "4", 337 "4.1", 338 "4.2", 339 "5", 340 "5.1", 341 "5.2", 342 "6.0", 343 "6.1", 344 "6.2", 345 NULL, 346 }; 347 static const char * const h264_loop_filter[] = { 348 "Enabled", 349 "Disabled", 350 "Disabled at Slice Boundary", 351 NULL, 352 }; 353 static const char * const h264_profile[] = { 354 "Baseline", 355 "Constrained Baseline", 356 "Main", 357 "Extended", 358 "High", 359 "High 10", 360 "High 422", 361 "High 444 Predictive", 362 "High 10 Intra", 363 "High 422 Intra", 364 "High 444 Intra", 365 "CAVLC 444 Intra", 366 "Scalable Baseline", 367 "Scalable High", 368 "Scalable High Intra", 369 "Stereo High", 370 "Multiview High", 371 "Constrained High", 372 NULL, 373 }; 374 static const char * const vui_sar_idc[] = { 375 "Unspecified", 376 "1:1", 377 "12:11", 378 "10:11", 379 "16:11", 380 "40:33", 381 "24:11", 382 "20:11", 383 "32:11", 384 "80:33", 385 "18:11", 386 "15:11", 387 "64:33", 388 "160:99", 389 "4:3", 390 "3:2", 391 "2:1", 392 "Extended SAR", 393 NULL, 394 }; 395 static const char * const h264_fp_arrangement_type[] = { 396 "Checkerboard", 397 "Column", 398 "Row", 399 "Side by Side", 400 "Top Bottom", 401 "Temporal", 402 NULL, 403 }; 404 static const char * const h264_fmo_map_type[] = { 405 "Interleaved Slices", 406 "Scattered Slices", 407 "Foreground with Leftover", 408 "Box Out", 409 "Raster Scan", 410 "Wipe Scan", 411 "Explicit", 412 NULL, 413 }; 414 static const char * const h264_decode_mode[] = { 415 "Slice-Based", 416 "Frame-Based", 417 NULL, 418 }; 419 static const char * const h264_start_code[] = { 420 "No Start Code", 421 "Annex B Start Code", 422 NULL, 423 }; 424 static const char * const mpeg_mpeg2_level[] = { 425 "Low", 426 "Main", 427 "High 1440", 428 "High", 429 NULL, 430 }; 431 static const char * const mpeg2_profile[] = { 432 "Simple", 433 "Main", 434 "SNR Scalable", 435 "Spatially Scalable", 436 "High", 437 NULL, 438 }; 439 static const char * const mpeg_mpeg4_level[] = { 440 "0", 441 "0b", 442 "1", 443 "2", 444 "3", 445 "3b", 446 "4", 447 "5", 448 NULL, 449 }; 450 static const char * const mpeg4_profile[] = { 451 "Simple", 452 "Advanced Simple", 453 "Core", 454 "Simple Scalable", 455 "Advanced Coding Efficiency", 456 NULL, 457 }; 458 459 static const char * const vpx_golden_frame_sel[] = { 460 "Use Previous Frame", 461 "Use Previous Specific Frame", 462 NULL, 463 }; 464 static const char * const vp8_profile[] = { 465 "0", 466 "1", 467 "2", 468 "3", 469 NULL, 470 }; 471 static const char * const vp9_profile[] = { 472 "0", 473 "1", 474 "2", 475 "3", 476 NULL, 477 }; 478 static const char * const vp9_level[] = { 479 "1", 480 "1.1", 481 "2", 482 "2.1", 483 "3", 484 "3.1", 485 "4", 486 "4.1", 487 "5", 488 "5.1", 489 "5.2", 490 "6", 491 "6.1", 492 "6.2", 493 NULL, 494 }; 495 496 static const char * const flash_led_mode[] = { 497 "Off", 498 "Flash", 499 "Torch", 500 NULL, 501 }; 502 static const char * const flash_strobe_source[] = { 503 "Software", 504 "External", 505 NULL, 506 }; 507 508 static const char * const jpeg_chroma_subsampling[] = { 509 "4:4:4", 510 "4:2:2", 511 "4:2:0", 512 "4:1:1", 513 "4:1:0", 514 "Gray", 515 NULL, 516 }; 517 static const char * const dv_tx_mode[] = { 518 "DVI-D", 519 "HDMI", 520 NULL, 521 }; 522 static const char * const dv_rgb_range[] = { 523 "Automatic", 524 "RGB Limited Range (16-235)", 525 "RGB Full Range (0-255)", 526 NULL, 527 }; 528 static const char * const dv_it_content_type[] = { 529 "Graphics", 530 "Photo", 531 "Cinema", 532 "Game", 533 "No IT Content", 534 NULL, 535 }; 536 static const char * const detect_md_mode[] = { 537 "Disabled", 538 "Global", 539 "Threshold Grid", 540 "Region Grid", 541 NULL, 542 }; 543 544 static const char * const hevc_profile[] = { 545 "Main", 546 "Main Still Picture", 547 "Main 10", 548 NULL, 549 }; 550 static const char * const hevc_level[] = { 551 "1", 552 "2", 553 "2.1", 554 "3", 555 "3.1", 556 "4", 557 "4.1", 558 "5", 559 "5.1", 560 "5.2", 561 "6", 562 "6.1", 563 "6.2", 564 NULL, 565 }; 566 static const char * const hevc_hierarchial_coding_type[] = { 567 "B", 568 "P", 569 NULL, 570 }; 571 static const char * const hevc_refresh_type[] = { 572 "None", 573 "CRA", 574 "IDR", 575 NULL, 576 }; 577 static const char * const hevc_size_of_length_field[] = { 578 "0", 579 "1", 580 "2", 581 "4", 582 NULL, 583 }; 584 static const char * const hevc_tier[] = { 585 "Main", 586 "High", 587 NULL, 588 }; 589 static const char * const hevc_loop_filter_mode[] = { 590 "Disabled", 591 "Enabled", 592 "Disabled at slice boundary", 593 "NULL", 594 }; 595 static const char * const hevc_decode_mode[] = { 596 "Slice-Based", 597 "Frame-Based", 598 NULL, 599 }; 600 static const char * const hevc_start_code[] = { 601 "No Start Code", 602 "Annex B Start Code", 603 NULL, 604 }; 605 static const char * const camera_orientation[] = { 606 "Front", 607 "Back", 608 "External", 609 NULL, 610 }; 611 static const char * const mpeg_video_frame_skip[] = { 612 "Disabled", 613 "Level Limit", 614 "VBV/CPB Limit", 615 NULL, 616 }; 617 618 switch (id) { 619 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: 620 return mpeg_audio_sampling_freq; 621 case V4L2_CID_MPEG_AUDIO_ENCODING: 622 return mpeg_audio_encoding; 623 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: 624 return mpeg_audio_l1_bitrate; 625 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: 626 return mpeg_audio_l2_bitrate; 627 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: 628 return mpeg_audio_l3_bitrate; 629 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: 630 return mpeg_audio_ac3_bitrate; 631 case V4L2_CID_MPEG_AUDIO_MODE: 632 return mpeg_audio_mode; 633 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: 634 return mpeg_audio_mode_extension; 635 case V4L2_CID_MPEG_AUDIO_EMPHASIS: 636 return mpeg_audio_emphasis; 637 case V4L2_CID_MPEG_AUDIO_CRC: 638 return mpeg_audio_crc; 639 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: 640 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: 641 return mpeg_audio_dec_playback; 642 case V4L2_CID_MPEG_VIDEO_ENCODING: 643 return mpeg_video_encoding; 644 case V4L2_CID_MPEG_VIDEO_ASPECT: 645 return mpeg_video_aspect; 646 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: 647 return mpeg_video_bitrate_mode; 648 case V4L2_CID_MPEG_STREAM_TYPE: 649 return mpeg_stream_type; 650 case V4L2_CID_MPEG_STREAM_VBI_FMT: 651 return mpeg_stream_vbi_fmt; 652 case V4L2_CID_POWER_LINE_FREQUENCY: 653 return camera_power_line_frequency; 654 case V4L2_CID_EXPOSURE_AUTO: 655 return camera_exposure_auto; 656 case V4L2_CID_EXPOSURE_METERING: 657 return camera_exposure_metering; 658 case V4L2_CID_AUTO_FOCUS_RANGE: 659 return camera_auto_focus_range; 660 case V4L2_CID_COLORFX: 661 return colorfx; 662 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: 663 return auto_n_preset_white_balance; 664 case V4L2_CID_ISO_SENSITIVITY_AUTO: 665 return camera_iso_sensitivity_auto; 666 case V4L2_CID_SCENE_MODE: 667 return scene_mode; 668 case V4L2_CID_TUNE_PREEMPHASIS: 669 return tune_emphasis; 670 case V4L2_CID_TUNE_DEEMPHASIS: 671 return tune_emphasis; 672 case V4L2_CID_FLASH_LED_MODE: 673 return flash_led_mode; 674 case V4L2_CID_FLASH_STROBE_SOURCE: 675 return flash_strobe_source; 676 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: 677 return header_mode; 678 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: 679 return mpeg_video_frame_skip; 680 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: 681 return multi_slice; 682 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: 683 return entropy_mode; 684 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: 685 return mpeg_h264_level; 686 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: 687 return h264_loop_filter; 688 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: 689 return h264_profile; 690 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: 691 return vui_sar_idc; 692 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: 693 return h264_fp_arrangement_type; 694 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: 695 return h264_fmo_map_type; 696 case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE: 697 return h264_decode_mode; 698 case V4L2_CID_MPEG_VIDEO_H264_START_CODE: 699 return h264_start_code; 700 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: 701 return mpeg_mpeg2_level; 702 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: 703 return mpeg2_profile; 704 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: 705 return mpeg_mpeg4_level; 706 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: 707 return mpeg4_profile; 708 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: 709 return vpx_golden_frame_sel; 710 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: 711 return vp8_profile; 712 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: 713 return vp9_profile; 714 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: 715 return vp9_level; 716 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: 717 return jpeg_chroma_subsampling; 718 case V4L2_CID_DV_TX_MODE: 719 return dv_tx_mode; 720 case V4L2_CID_DV_TX_RGB_RANGE: 721 case V4L2_CID_DV_RX_RGB_RANGE: 722 return dv_rgb_range; 723 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: 724 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: 725 return dv_it_content_type; 726 case V4L2_CID_DETECT_MD_MODE: 727 return detect_md_mode; 728 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: 729 return hevc_profile; 730 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: 731 return hevc_level; 732 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: 733 return hevc_hierarchial_coding_type; 734 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: 735 return hevc_refresh_type; 736 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: 737 return hevc_size_of_length_field; 738 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: 739 return hevc_tier; 740 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: 741 return hevc_loop_filter_mode; 742 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: 743 return hevc_decode_mode; 744 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: 745 return hevc_start_code; 746 case V4L2_CID_CAMERA_ORIENTATION: 747 return camera_orientation; 748 default: 749 return NULL; 750 } 751} 752EXPORT_SYMBOL(v4l2_ctrl_get_menu); 753 754#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; }) 755/* 756 * Returns NULL or an s64 type array containing the menu for given 757 * control ID. The total number of the menu items is returned in @len. 758 */ 759const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len) 760{ 761 static const s64 qmenu_int_vpx_num_partitions[] = { 762 1, 2, 4, 8, 763 }; 764 765 static const s64 qmenu_int_vpx_num_ref_frames[] = { 766 1, 2, 3, 767 }; 768 769 switch (id) { 770 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: 771 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len); 772 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: 773 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len); 774 default: 775 *len = 0; 776 return NULL; 777 } 778} 779EXPORT_SYMBOL(v4l2_ctrl_get_int_menu); 780 781/* Return the control name. */ 782const char *v4l2_ctrl_get_name(u32 id) 783{ 784 switch (id) { 785 /* USER controls */ 786 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 787 case V4L2_CID_USER_CLASS: return "User Controls"; 788 case V4L2_CID_BRIGHTNESS: return "Brightness"; 789 case V4L2_CID_CONTRAST: return "Contrast"; 790 case V4L2_CID_SATURATION: return "Saturation"; 791 case V4L2_CID_HUE: return "Hue"; 792 case V4L2_CID_AUDIO_VOLUME: return "Volume"; 793 case V4L2_CID_AUDIO_BALANCE: return "Balance"; 794 case V4L2_CID_AUDIO_BASS: return "Bass"; 795 case V4L2_CID_AUDIO_TREBLE: return "Treble"; 796 case V4L2_CID_AUDIO_MUTE: return "Mute"; 797 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness"; 798 case V4L2_CID_BLACK_LEVEL: return "Black Level"; 799 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic"; 800 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance"; 801 case V4L2_CID_RED_BALANCE: return "Red Balance"; 802 case V4L2_CID_BLUE_BALANCE: return "Blue Balance"; 803 case V4L2_CID_GAMMA: return "Gamma"; 804 case V4L2_CID_EXPOSURE: return "Exposure"; 805 case V4L2_CID_AUTOGAIN: return "Gain, Automatic"; 806 case V4L2_CID_GAIN: return "Gain"; 807 case V4L2_CID_HFLIP: return "Horizontal Flip"; 808 case V4L2_CID_VFLIP: return "Vertical Flip"; 809 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency"; 810 case V4L2_CID_HUE_AUTO: return "Hue, Automatic"; 811 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature"; 812 case V4L2_CID_SHARPNESS: return "Sharpness"; 813 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation"; 814 case V4L2_CID_CHROMA_AGC: return "Chroma AGC"; 815 case V4L2_CID_COLOR_KILLER: return "Color Killer"; 816 case V4L2_CID_COLORFX: return "Color Effects"; 817 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic"; 818 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter"; 819 case V4L2_CID_ROTATE: return "Rotate"; 820 case V4L2_CID_BG_COLOR: return "Background Color"; 821 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain"; 822 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1"; 823 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2"; 824 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers"; 825 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers"; 826 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component"; 827 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr"; 828 829 /* Codec controls */ 830 /* The MPEG controls are applicable to all codec controls 831 * and the 'MPEG' part of the define is historical */ 832 /* Keep the order of the 'case's the same as in videodev2.h! */ 833 case V4L2_CID_MPEG_CLASS: return "Codec Controls"; 834 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type"; 835 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID"; 836 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID"; 837 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID"; 838 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID"; 839 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID"; 840 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID"; 841 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format"; 842 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency"; 843 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding"; 844 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate"; 845 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate"; 846 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate"; 847 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode"; 848 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension"; 849 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis"; 850 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC"; 851 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute"; 852 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate"; 853 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate"; 854 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback"; 855 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback"; 856 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding"; 857 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect"; 858 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames"; 859 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size"; 860 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure"; 861 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown"; 862 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode"; 863 case V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY: return "Constant Quality"; 864 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate"; 865 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate"; 866 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation"; 867 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute"; 868 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV"; 869 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface"; 870 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable"; 871 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs"; 872 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable"; 873 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control"; 874 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode"; 875 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics"; 876 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: return "Frame Skip Mode"; 877 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value"; 878 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value"; 879 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value"; 880 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value"; 881 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value"; 882 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value"; 883 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value"; 884 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value"; 885 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value"; 886 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value"; 887 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable"; 888 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size"; 889 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode"; 890 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period"; 891 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level"; 892 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset"; 893 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset"; 894 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode"; 895 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile"; 896 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR"; 897 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR"; 898 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable"; 899 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC"; 900 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI"; 901 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0"; 902 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type"; 903 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering"; 904 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO"; 905 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups"; 906 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change"; 907 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp"; 908 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs"; 909 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering"; 910 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order"; 911 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding"; 912 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type"; 913 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers"; 914 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP: 915 return "H264 Set QP Value for HC Layers"; 916 case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION: 917 return "H264 Constrained Intra Pred"; 918 case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset"; 919 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP: return "H264 I-Frame Minimum QP Value"; 920 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP: return "H264 I-Frame Maximum QP Value"; 921 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP: return "H264 P-Frame Minimum QP Value"; 922 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP: return "H264 P-Frame Maximum QP Value"; 923 case V4L2_CID_MPEG_VIDEO_H264_SPS: return "H264 Sequence Parameter Set"; 924 case V4L2_CID_MPEG_VIDEO_H264_PPS: return "H264 Picture Parameter Set"; 925 case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX: return "H264 Scaling Matrix"; 926 case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS: return "H264 Slice Parameters"; 927 case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS: return "H264 Decode Parameters"; 928 case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE: return "H264 Decode Mode"; 929 case V4L2_CID_MPEG_VIDEO_H264_START_CODE: return "H264 Start Code"; 930 case V4L2_CID_MPEG_VIDEO_H264_PRED_WEIGHTS: return "H264 Prediction Weight Table"; 931 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: return "MPEG2 Level"; 932 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: return "MPEG2 Profile"; 933 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value"; 934 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value"; 935 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value"; 936 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value"; 937 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value"; 938 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level"; 939 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile"; 940 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable"; 941 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice"; 942 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice"; 943 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method"; 944 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size"; 945 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS"; 946 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count"; 947 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control"; 948 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range"; 949 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range"; 950 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header"; 951 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame"; 952 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters"; 953 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices"; 954 case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS: return "FWHT Stateless Parameters"; 955 case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value"; 956 case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value"; 957 958 /* VPX controls */ 959 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions"; 960 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable"; 961 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame"; 962 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range"; 963 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control"; 964 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period"; 965 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator"; 966 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value"; 967 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value"; 968 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value"; 969 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value"; 970 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile"; 971 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile"; 972 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: return "VP9 Level"; 973 case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER: return "VP8 Frame Header"; 974 975 /* HEVC controls */ 976 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value"; 977 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP: return "HEVC P-Frame QP Value"; 978 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP: return "HEVC B-Frame QP Value"; 979 case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP: return "HEVC Minimum QP Value"; 980 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP: return "HEVC Maximum QP Value"; 981 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: return "HEVC Profile"; 982 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: return "HEVC Level"; 983 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: return "HEVC Tier"; 984 case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION: return "HEVC Frame Rate Resolution"; 985 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH: return "HEVC Maximum Coding Unit Depth"; 986 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: return "HEVC Refresh Type"; 987 case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED: return "HEVC Constant Intra Prediction"; 988 case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU: return "HEVC Lossless Encoding"; 989 case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT: return "HEVC Wavefront"; 990 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: return "HEVC Loop Filter"; 991 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP: return "HEVC QP Values"; 992 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: return "HEVC Hierarchical Coding Type"; 993 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER: return "HEVC Hierarchical Coding Layer"; 994 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP: return "HEVC Hierarchical Layer 0 QP"; 995 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP: return "HEVC Hierarchical Layer 1 QP"; 996 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP: return "HEVC Hierarchical Layer 2 QP"; 997 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP: return "HEVC Hierarchical Layer 3 QP"; 998 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP: return "HEVC Hierarchical Layer 4 QP"; 999 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP: return "HEVC Hierarchical Layer 5 QP"; 1000 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP: return "HEVC Hierarchical Layer 6 QP"; 1001 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR: return "HEVC Hierarchical Lay 0 BitRate"; 1002 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR: return "HEVC Hierarchical Lay 1 BitRate"; 1003 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR: return "HEVC Hierarchical Lay 2 BitRate"; 1004 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR: return "HEVC Hierarchical Lay 3 BitRate"; 1005 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR: return "HEVC Hierarchical Lay 4 BitRate"; 1006 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR: return "HEVC Hierarchical Lay 5 BitRate"; 1007 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR: return "HEVC Hierarchical Lay 6 BitRate"; 1008 case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB: return "HEVC General PB"; 1009 case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID: return "HEVC Temporal ID"; 1010 case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING: return "HEVC Strong Intra Smoothing"; 1011 case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT: return "HEVC Intra PU Split"; 1012 case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION: return "HEVC TMV Prediction"; 1013 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1: return "HEVC Max Num of Candidate MVs"; 1014 case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE: return "HEVC ENC Without Startcode"; 1015 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD: return "HEVC Num of I-Frame b/w 2 IDR"; 1016 case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2: return "HEVC Loop Filter Beta Offset"; 1017 case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2: return "HEVC Loop Filter TC Offset"; 1018 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: return "HEVC Size of Length Field"; 1019 case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES: return "Reference Frames for a P-Frame"; 1020 case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR: return "Prepend SPS and PPS to IDR"; 1021 case V4L2_CID_MPEG_VIDEO_HEVC_SPS: return "HEVC Sequence Parameter Set"; 1022 case V4L2_CID_MPEG_VIDEO_HEVC_PPS: return "HEVC Picture Parameter Set"; 1023 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters"; 1024 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode"; 1025 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code"; 1026 1027 /* CAMERA controls */ 1028 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1029 case V4L2_CID_CAMERA_CLASS: return "Camera Controls"; 1030 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure"; 1031 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute"; 1032 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate"; 1033 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative"; 1034 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative"; 1035 case V4L2_CID_PAN_RESET: return "Pan, Reset"; 1036 case V4L2_CID_TILT_RESET: return "Tilt, Reset"; 1037 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute"; 1038 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute"; 1039 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute"; 1040 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative"; 1041 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous"; 1042 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute"; 1043 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative"; 1044 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous"; 1045 case V4L2_CID_PRIVACY: return "Privacy"; 1046 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute"; 1047 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative"; 1048 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias"; 1049 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset"; 1050 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range"; 1051 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization"; 1052 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity"; 1053 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto"; 1054 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode"; 1055 case V4L2_CID_SCENE_MODE: return "Scene Mode"; 1056 case V4L2_CID_3A_LOCK: return "3A Lock"; 1057 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start"; 1058 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop"; 1059 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status"; 1060 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range"; 1061 case V4L2_CID_PAN_SPEED: return "Pan, Speed"; 1062 case V4L2_CID_TILT_SPEED: return "Tilt, Speed"; 1063 case V4L2_CID_UNIT_CELL_SIZE: return "Unit Cell Size"; 1064 case V4L2_CID_CAMERA_ORIENTATION: return "Camera Orientation"; 1065 case V4L2_CID_CAMERA_SENSOR_ROTATION: return "Camera Sensor Rotation"; 1066 1067 /* FM Radio Modulator controls */ 1068 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1069 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls"; 1070 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation"; 1071 case V4L2_CID_RDS_TX_PI: return "RDS Program ID"; 1072 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type"; 1073 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name"; 1074 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text"; 1075 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo"; 1076 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head"; 1077 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed"; 1078 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY"; 1079 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement"; 1080 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program"; 1081 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music"; 1082 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies"; 1083 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies"; 1084 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled"; 1085 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time"; 1086 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation"; 1087 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled"; 1088 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain"; 1089 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold"; 1090 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time"; 1091 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time"; 1092 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled"; 1093 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation"; 1094 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency"; 1095 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis"; 1096 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level"; 1097 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor"; 1098 1099 /* Flash controls */ 1100 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1101 case V4L2_CID_FLASH_CLASS: return "Flash Controls"; 1102 case V4L2_CID_FLASH_LED_MODE: return "LED Mode"; 1103 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source"; 1104 case V4L2_CID_FLASH_STROBE: return "Strobe"; 1105 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe"; 1106 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status"; 1107 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout"; 1108 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode"; 1109 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode"; 1110 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator"; 1111 case V4L2_CID_FLASH_FAULT: return "Faults"; 1112 case V4L2_CID_FLASH_CHARGE: return "Charge"; 1113 case V4L2_CID_FLASH_READY: return "Ready to Strobe"; 1114 1115 /* JPEG encoder controls */ 1116 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1117 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls"; 1118 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling"; 1119 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval"; 1120 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality"; 1121 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers"; 1122 1123 /* Image source controls */ 1124 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1125 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls"; 1126 case V4L2_CID_VBLANK: return "Vertical Blanking"; 1127 case V4L2_CID_HBLANK: return "Horizontal Blanking"; 1128 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain"; 1129 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value"; 1130 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value"; 1131 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value"; 1132 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value"; 1133 1134 /* Image processing controls */ 1135 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1136 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls"; 1137 case V4L2_CID_LINK_FREQ: return "Link Frequency"; 1138 case V4L2_CID_PIXEL_RATE: return "Pixel Rate"; 1139 case V4L2_CID_TEST_PATTERN: return "Test Pattern"; 1140 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode"; 1141 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain"; 1142 1143 /* DV controls */ 1144 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1145 case V4L2_CID_DV_CLASS: return "Digital Video Controls"; 1146 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present"; 1147 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present"; 1148 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present"; 1149 case V4L2_CID_DV_TX_MODE: return "Transmit Mode"; 1150 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range"; 1151 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type"; 1152 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present"; 1153 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range"; 1154 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type"; 1155 1156 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls"; 1157 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis"; 1158 case V4L2_CID_RDS_RECEPTION: return "RDS Reception"; 1159 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls"; 1160 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain"; 1161 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto"; 1162 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain"; 1163 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto"; 1164 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain"; 1165 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto"; 1166 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain"; 1167 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto"; 1168 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth"; 1169 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock"; 1170 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type"; 1171 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name"; 1172 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text"; 1173 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement"; 1174 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program"; 1175 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music"; 1176 1177 /* Detection controls */ 1178 /* Keep the order of the 'case's the same as in v4l2-controls.h! */ 1179 case V4L2_CID_DETECT_CLASS: return "Detection Controls"; 1180 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode"; 1181 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold"; 1182 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid"; 1183 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid"; 1184 default: 1185 return NULL; 1186 } 1187} 1188EXPORT_SYMBOL(v4l2_ctrl_get_name); 1189 1190void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type, 1191 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags) 1192{ 1193 *name = v4l2_ctrl_get_name(id); 1194 *flags = 0; 1195 1196 switch (id) { 1197 case V4L2_CID_AUDIO_MUTE: 1198 case V4L2_CID_AUDIO_LOUDNESS: 1199 case V4L2_CID_AUTO_WHITE_BALANCE: 1200 case V4L2_CID_AUTOGAIN: 1201 case V4L2_CID_HFLIP: 1202 case V4L2_CID_VFLIP: 1203 case V4L2_CID_HUE_AUTO: 1204 case V4L2_CID_CHROMA_AGC: 1205 case V4L2_CID_COLOR_KILLER: 1206 case V4L2_CID_AUTOBRIGHTNESS: 1207 case V4L2_CID_MPEG_AUDIO_MUTE: 1208 case V4L2_CID_MPEG_VIDEO_MUTE: 1209 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: 1210 case V4L2_CID_MPEG_VIDEO_PULLDOWN: 1211 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: 1212 case V4L2_CID_FOCUS_AUTO: 1213 case V4L2_CID_PRIVACY: 1214 case V4L2_CID_AUDIO_LIMITER_ENABLED: 1215 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: 1216 case V4L2_CID_PILOT_TONE_ENABLED: 1217 case V4L2_CID_ILLUMINATORS_1: 1218 case V4L2_CID_ILLUMINATORS_2: 1219 case V4L2_CID_FLASH_STROBE_STATUS: 1220 case V4L2_CID_FLASH_CHARGE: 1221 case V4L2_CID_FLASH_READY: 1222 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: 1223 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: 1224 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: 1225 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: 1226 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: 1227 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: 1228 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: 1229 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: 1230 case V4L2_CID_WIDE_DYNAMIC_RANGE: 1231 case V4L2_CID_IMAGE_STABILIZATION: 1232 case V4L2_CID_RDS_RECEPTION: 1233 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: 1234 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: 1235 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: 1236 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1237 case V4L2_CID_RF_TUNER_PLL_LOCK: 1238 case V4L2_CID_RDS_TX_MONO_STEREO: 1239 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: 1240 case V4L2_CID_RDS_TX_COMPRESSED: 1241 case V4L2_CID_RDS_TX_DYNAMIC_PTY: 1242 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: 1243 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: 1244 case V4L2_CID_RDS_TX_MUSIC_SPEECH: 1245 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: 1246 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: 1247 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: 1248 case V4L2_CID_RDS_RX_MUSIC_SPEECH: 1249 *type = V4L2_CTRL_TYPE_BOOLEAN; 1250 *min = 0; 1251 *max = *step = 1; 1252 break; 1253 case V4L2_CID_ROTATE: 1254 *type = V4L2_CTRL_TYPE_INTEGER; 1255 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; 1256 break; 1257 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: 1258 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: 1259 *type = V4L2_CTRL_TYPE_INTEGER; 1260 break; 1261 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: 1262 case V4L2_CID_PAN_RESET: 1263 case V4L2_CID_TILT_RESET: 1264 case V4L2_CID_FLASH_STROBE: 1265 case V4L2_CID_FLASH_STROBE_STOP: 1266 case V4L2_CID_AUTO_FOCUS_START: 1267 case V4L2_CID_AUTO_FOCUS_STOP: 1268 case V4L2_CID_DO_WHITE_BALANCE: 1269 *type = V4L2_CTRL_TYPE_BUTTON; 1270 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY | 1271 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE; 1272 *min = *max = *step = *def = 0; 1273 break; 1274 case V4L2_CID_POWER_LINE_FREQUENCY: 1275 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: 1276 case V4L2_CID_MPEG_AUDIO_ENCODING: 1277 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: 1278 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: 1279 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: 1280 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: 1281 case V4L2_CID_MPEG_AUDIO_MODE: 1282 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: 1283 case V4L2_CID_MPEG_AUDIO_EMPHASIS: 1284 case V4L2_CID_MPEG_AUDIO_CRC: 1285 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: 1286 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: 1287 case V4L2_CID_MPEG_VIDEO_ENCODING: 1288 case V4L2_CID_MPEG_VIDEO_ASPECT: 1289 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: 1290 case V4L2_CID_MPEG_STREAM_TYPE: 1291 case V4L2_CID_MPEG_STREAM_VBI_FMT: 1292 case V4L2_CID_EXPOSURE_AUTO: 1293 case V4L2_CID_AUTO_FOCUS_RANGE: 1294 case V4L2_CID_COLORFX: 1295 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: 1296 case V4L2_CID_TUNE_PREEMPHASIS: 1297 case V4L2_CID_FLASH_LED_MODE: 1298 case V4L2_CID_FLASH_STROBE_SOURCE: 1299 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: 1300 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: 1301 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: 1302 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: 1303 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: 1304 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: 1305 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: 1306 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: 1307 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: 1308 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: 1309 case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE: 1310 case V4L2_CID_MPEG_VIDEO_H264_START_CODE: 1311 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: 1312 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: 1313 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: 1314 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: 1315 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: 1316 case V4L2_CID_ISO_SENSITIVITY_AUTO: 1317 case V4L2_CID_EXPOSURE_METERING: 1318 case V4L2_CID_SCENE_MODE: 1319 case V4L2_CID_DV_TX_MODE: 1320 case V4L2_CID_DV_TX_RGB_RANGE: 1321 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: 1322 case V4L2_CID_DV_RX_RGB_RANGE: 1323 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: 1324 case V4L2_CID_TEST_PATTERN: 1325 case V4L2_CID_DEINTERLACING_MODE: 1326 case V4L2_CID_TUNE_DEEMPHASIS: 1327 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: 1328 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: 1329 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: 1330 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: 1331 case V4L2_CID_DETECT_MD_MODE: 1332 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: 1333 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: 1334 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: 1335 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: 1336 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: 1337 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: 1338 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: 1339 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: 1340 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: 1341 case V4L2_CID_CAMERA_ORIENTATION: 1342 *type = V4L2_CTRL_TYPE_MENU; 1343 break; 1344 case V4L2_CID_LINK_FREQ: 1345 *type = V4L2_CTRL_TYPE_INTEGER_MENU; 1346 break; 1347 case V4L2_CID_RDS_TX_PS_NAME: 1348 case V4L2_CID_RDS_TX_RADIO_TEXT: 1349 case V4L2_CID_RDS_RX_PS_NAME: 1350 case V4L2_CID_RDS_RX_RADIO_TEXT: 1351 *type = V4L2_CTRL_TYPE_STRING; 1352 break; 1353 case V4L2_CID_ISO_SENSITIVITY: 1354 case V4L2_CID_AUTO_EXPOSURE_BIAS: 1355 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: 1356 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: 1357 *type = V4L2_CTRL_TYPE_INTEGER_MENU; 1358 break; 1359 case V4L2_CID_USER_CLASS: 1360 case V4L2_CID_CAMERA_CLASS: 1361 case V4L2_CID_MPEG_CLASS: 1362 case V4L2_CID_FM_TX_CLASS: 1363 case V4L2_CID_FLASH_CLASS: 1364 case V4L2_CID_JPEG_CLASS: 1365 case V4L2_CID_IMAGE_SOURCE_CLASS: 1366 case V4L2_CID_IMAGE_PROC_CLASS: 1367 case V4L2_CID_DV_CLASS: 1368 case V4L2_CID_FM_RX_CLASS: 1369 case V4L2_CID_RF_TUNER_CLASS: 1370 case V4L2_CID_DETECT_CLASS: 1371 *type = V4L2_CTRL_TYPE_CTRL_CLASS; 1372 /* You can neither read not write these */ 1373 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY; 1374 *min = *max = *step = *def = 0; 1375 break; 1376 case V4L2_CID_BG_COLOR: 1377 *type = V4L2_CTRL_TYPE_INTEGER; 1378 *step = 1; 1379 *min = 0; 1380 /* Max is calculated as RGB888 that is 2^24 */ 1381 *max = 0xFFFFFF; 1382 break; 1383 case V4L2_CID_FLASH_FAULT: 1384 case V4L2_CID_JPEG_ACTIVE_MARKER: 1385 case V4L2_CID_3A_LOCK: 1386 case V4L2_CID_AUTO_FOCUS_STATUS: 1387 case V4L2_CID_DV_TX_HOTPLUG: 1388 case V4L2_CID_DV_TX_RXSENSE: 1389 case V4L2_CID_DV_TX_EDID_PRESENT: 1390 case V4L2_CID_DV_RX_POWER_PRESENT: 1391 *type = V4L2_CTRL_TYPE_BITMASK; 1392 break; 1393 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: 1394 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: 1395 *type = V4L2_CTRL_TYPE_INTEGER; 1396 *flags |= V4L2_CTRL_FLAG_READ_ONLY; 1397 break; 1398 case V4L2_CID_MPEG_VIDEO_DEC_PTS: 1399 *type = V4L2_CTRL_TYPE_INTEGER64; 1400 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY; 1401 *min = *def = 0; 1402 *max = 0x1ffffffffLL; 1403 *step = 1; 1404 break; 1405 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: 1406 *type = V4L2_CTRL_TYPE_INTEGER64; 1407 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY; 1408 *min = *def = 0; 1409 *max = 0x7fffffffffffffffLL; 1410 *step = 1; 1411 break; 1412 case V4L2_CID_PIXEL_RATE: 1413 *type = V4L2_CTRL_TYPE_INTEGER64; 1414 *flags |= V4L2_CTRL_FLAG_READ_ONLY; 1415 break; 1416 case V4L2_CID_DETECT_MD_REGION_GRID: 1417 *type = V4L2_CTRL_TYPE_U8; 1418 break; 1419 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: 1420 *type = V4L2_CTRL_TYPE_U16; 1421 break; 1422 case V4L2_CID_RDS_TX_ALT_FREQS: 1423 *type = V4L2_CTRL_TYPE_U32; 1424 break; 1425 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: 1426 *type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS; 1427 break; 1428 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: 1429 *type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION; 1430 break; 1431 case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS: 1432 *type = V4L2_CTRL_TYPE_FWHT_PARAMS; 1433 break; 1434 case V4L2_CID_MPEG_VIDEO_H264_SPS: 1435 *type = V4L2_CTRL_TYPE_H264_SPS; 1436 break; 1437 case V4L2_CID_MPEG_VIDEO_H264_PPS: 1438 *type = V4L2_CTRL_TYPE_H264_PPS; 1439 break; 1440 case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX: 1441 *type = V4L2_CTRL_TYPE_H264_SCALING_MATRIX; 1442 break; 1443 case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS: 1444 *type = V4L2_CTRL_TYPE_H264_SLICE_PARAMS; 1445 break; 1446 case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS: 1447 *type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS; 1448 break; 1449 case V4L2_CID_MPEG_VIDEO_H264_PRED_WEIGHTS: 1450 *type = V4L2_CTRL_TYPE_H264_PRED_WEIGHTS; 1451 break; 1452 case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER: 1453 *type = V4L2_CTRL_TYPE_VP8_FRAME_HEADER; 1454 break; 1455 case V4L2_CID_MPEG_VIDEO_HEVC_SPS: 1456 *type = V4L2_CTRL_TYPE_HEVC_SPS; 1457 break; 1458 case V4L2_CID_MPEG_VIDEO_HEVC_PPS: 1459 *type = V4L2_CTRL_TYPE_HEVC_PPS; 1460 break; 1461 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: 1462 *type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS; 1463 break; 1464 case V4L2_CID_UNIT_CELL_SIZE: 1465 *type = V4L2_CTRL_TYPE_AREA; 1466 *flags |= V4L2_CTRL_FLAG_READ_ONLY; 1467 break; 1468 default: 1469 *type = V4L2_CTRL_TYPE_INTEGER; 1470 break; 1471 } 1472 switch (id) { 1473 case V4L2_CID_MPEG_AUDIO_ENCODING: 1474 case V4L2_CID_MPEG_AUDIO_MODE: 1475 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: 1476 case V4L2_CID_MPEG_VIDEO_B_FRAMES: 1477 case V4L2_CID_MPEG_STREAM_TYPE: 1478 *flags |= V4L2_CTRL_FLAG_UPDATE; 1479 break; 1480 case V4L2_CID_AUDIO_VOLUME: 1481 case V4L2_CID_AUDIO_BALANCE: 1482 case V4L2_CID_AUDIO_BASS: 1483 case V4L2_CID_AUDIO_TREBLE: 1484 case V4L2_CID_BRIGHTNESS: 1485 case V4L2_CID_CONTRAST: 1486 case V4L2_CID_SATURATION: 1487 case V4L2_CID_HUE: 1488 case V4L2_CID_RED_BALANCE: 1489 case V4L2_CID_BLUE_BALANCE: 1490 case V4L2_CID_GAMMA: 1491 case V4L2_CID_SHARPNESS: 1492 case V4L2_CID_CHROMA_GAIN: 1493 case V4L2_CID_RDS_TX_DEVIATION: 1494 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: 1495 case V4L2_CID_AUDIO_LIMITER_DEVIATION: 1496 case V4L2_CID_AUDIO_COMPRESSION_GAIN: 1497 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: 1498 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: 1499 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: 1500 case V4L2_CID_PILOT_TONE_DEVIATION: 1501 case V4L2_CID_PILOT_TONE_FREQUENCY: 1502 case V4L2_CID_TUNE_POWER_LEVEL: 1503 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: 1504 case V4L2_CID_RF_TUNER_RF_GAIN: 1505 case V4L2_CID_RF_TUNER_LNA_GAIN: 1506 case V4L2_CID_RF_TUNER_MIXER_GAIN: 1507 case V4L2_CID_RF_TUNER_IF_GAIN: 1508 case V4L2_CID_RF_TUNER_BANDWIDTH: 1509 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: 1510 *flags |= V4L2_CTRL_FLAG_SLIDER; 1511 break; 1512 case V4L2_CID_PAN_RELATIVE: 1513 case V4L2_CID_TILT_RELATIVE: 1514 case V4L2_CID_FOCUS_RELATIVE: 1515 case V4L2_CID_IRIS_RELATIVE: 1516 case V4L2_CID_ZOOM_RELATIVE: 1517 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY | 1518 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE; 1519 break; 1520 case V4L2_CID_FLASH_STROBE_STATUS: 1521 case V4L2_CID_AUTO_FOCUS_STATUS: 1522 case V4L2_CID_FLASH_READY: 1523 case V4L2_CID_DV_TX_HOTPLUG: 1524 case V4L2_CID_DV_TX_RXSENSE: 1525 case V4L2_CID_DV_TX_EDID_PRESENT: 1526 case V4L2_CID_DV_RX_POWER_PRESENT: 1527 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: 1528 case V4L2_CID_RDS_RX_PTY: 1529 case V4L2_CID_RDS_RX_PS_NAME: 1530 case V4L2_CID_RDS_RX_RADIO_TEXT: 1531 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: 1532 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: 1533 case V4L2_CID_RDS_RX_MUSIC_SPEECH: 1534 case V4L2_CID_CAMERA_ORIENTATION: 1535 case V4L2_CID_CAMERA_SENSOR_ROTATION: 1536 *flags |= V4L2_CTRL_FLAG_READ_ONLY; 1537 break; 1538 case V4L2_CID_RF_TUNER_PLL_LOCK: 1539 *flags |= V4L2_CTRL_FLAG_VOLATILE; 1540 break; 1541 } 1542} 1543EXPORT_SYMBOL(v4l2_ctrl_fill); 1544 1545static u32 user_flags(const struct v4l2_ctrl *ctrl) 1546{ 1547 u32 flags = ctrl->flags; 1548 1549 if (ctrl->is_ptr) 1550 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD; 1551 1552 return flags; 1553} 1554 1555static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes) 1556{ 1557 memset(ev, 0, sizeof(*ev)); 1558 ev->type = V4L2_EVENT_CTRL; 1559 ev->id = ctrl->id; 1560 ev->u.ctrl.changes = changes; 1561 ev->u.ctrl.type = ctrl->type; 1562 ev->u.ctrl.flags = user_flags(ctrl); 1563 if (ctrl->is_ptr) 1564 ev->u.ctrl.value64 = 0; 1565 else 1566 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64; 1567 ev->u.ctrl.minimum = ctrl->minimum; 1568 ev->u.ctrl.maximum = ctrl->maximum; 1569 if (ctrl->type == V4L2_CTRL_TYPE_MENU 1570 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU) 1571 ev->u.ctrl.step = 1; 1572 else 1573 ev->u.ctrl.step = ctrl->step; 1574 ev->u.ctrl.default_value = ctrl->default_value; 1575} 1576 1577static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes) 1578{ 1579 struct v4l2_event ev; 1580 struct v4l2_subscribed_event *sev; 1581 1582 if (list_empty(&ctrl->ev_subs)) 1583 return; 1584 fill_event(&ev, ctrl, changes); 1585 1586 list_for_each_entry(sev, &ctrl->ev_subs, node) 1587 if (sev->fh != fh || 1588 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK)) 1589 v4l2_event_queue_fh(sev->fh, &ev); 1590} 1591 1592static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx, 1593 union v4l2_ctrl_ptr ptr1, 1594 union v4l2_ctrl_ptr ptr2) 1595{ 1596 switch (ctrl->type) { 1597 case V4L2_CTRL_TYPE_BUTTON: 1598 return false; 1599 case V4L2_CTRL_TYPE_STRING: 1600 idx *= ctrl->elem_size; 1601 /* strings are always 0-terminated */ 1602 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx); 1603 case V4L2_CTRL_TYPE_INTEGER64: 1604 return ptr1.p_s64[idx] == ptr2.p_s64[idx]; 1605 case V4L2_CTRL_TYPE_U8: 1606 return ptr1.p_u8[idx] == ptr2.p_u8[idx]; 1607 case V4L2_CTRL_TYPE_U16: 1608 return ptr1.p_u16[idx] == ptr2.p_u16[idx]; 1609 case V4L2_CTRL_TYPE_U32: 1610 return ptr1.p_u32[idx] == ptr2.p_u32[idx]; 1611 default: 1612 if (ctrl->is_int) 1613 return ptr1.p_s32[idx] == ptr2.p_s32[idx]; 1614 idx *= ctrl->elem_size; 1615 return !memcmp(ptr1.p_const + idx, ptr2.p_const + idx, 1616 ctrl->elem_size); 1617 } 1618} 1619 1620static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx, 1621 union v4l2_ctrl_ptr ptr) 1622{ 1623 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params; 1624 void *p = ptr.p + idx * ctrl->elem_size; 1625 1626 if (ctrl->p_def.p_const) 1627 memcpy(p, ctrl->p_def.p_const, ctrl->elem_size); 1628 else 1629 memset(p, 0, ctrl->elem_size); 1630 1631 /* 1632 * The cast is needed to get rid of a gcc warning complaining that 1633 * V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS is not part of the 1634 * v4l2_ctrl_type enum. 1635 */ 1636 switch ((u32)ctrl->type) { 1637 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS: 1638 p_mpeg2_slice_params = p; 1639 /* 4:2:0 */ 1640 p_mpeg2_slice_params->sequence.chroma_format = 1; 1641 /* interlaced top field */ 1642 p_mpeg2_slice_params->picture.picture_structure = 1; 1643 p_mpeg2_slice_params->picture.picture_coding_type = 1644 V4L2_MPEG2_PICTURE_CODING_TYPE_I; 1645 break; 1646 } 1647} 1648 1649static void std_init(const struct v4l2_ctrl *ctrl, u32 idx, 1650 union v4l2_ctrl_ptr ptr) 1651{ 1652 switch (ctrl->type) { 1653 case V4L2_CTRL_TYPE_STRING: 1654 idx *= ctrl->elem_size; 1655 memset(ptr.p_char + idx, ' ', ctrl->minimum); 1656 ptr.p_char[idx + ctrl->minimum] = '\0'; 1657 break; 1658 case V4L2_CTRL_TYPE_INTEGER64: 1659 ptr.p_s64[idx] = ctrl->default_value; 1660 break; 1661 case V4L2_CTRL_TYPE_INTEGER: 1662 case V4L2_CTRL_TYPE_INTEGER_MENU: 1663 case V4L2_CTRL_TYPE_MENU: 1664 case V4L2_CTRL_TYPE_BITMASK: 1665 case V4L2_CTRL_TYPE_BOOLEAN: 1666 ptr.p_s32[idx] = ctrl->default_value; 1667 break; 1668 case V4L2_CTRL_TYPE_BUTTON: 1669 case V4L2_CTRL_TYPE_CTRL_CLASS: 1670 ptr.p_s32[idx] = 0; 1671 break; 1672 case V4L2_CTRL_TYPE_U8: 1673 ptr.p_u8[idx] = ctrl->default_value; 1674 break; 1675 case V4L2_CTRL_TYPE_U16: 1676 ptr.p_u16[idx] = ctrl->default_value; 1677 break; 1678 case V4L2_CTRL_TYPE_U32: 1679 ptr.p_u32[idx] = ctrl->default_value; 1680 break; 1681 default: 1682 std_init_compound(ctrl, idx, ptr); 1683 break; 1684 } 1685} 1686 1687static void std_log(const struct v4l2_ctrl *ctrl) 1688{ 1689 union v4l2_ctrl_ptr ptr = ctrl->p_cur; 1690 1691 if (ctrl->is_array) { 1692 unsigned i; 1693 1694 for (i = 0; i < ctrl->nr_of_dims; i++) 1695 pr_cont("[%u]", ctrl->dims[i]); 1696 pr_cont(" "); 1697 } 1698 1699 switch (ctrl->type) { 1700 case V4L2_CTRL_TYPE_INTEGER: 1701 pr_cont("%d", *ptr.p_s32); 1702 break; 1703 case V4L2_CTRL_TYPE_BOOLEAN: 1704 pr_cont("%s", *ptr.p_s32 ? "true" : "false"); 1705 break; 1706 case V4L2_CTRL_TYPE_MENU: 1707 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]); 1708 break; 1709 case V4L2_CTRL_TYPE_INTEGER_MENU: 1710 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]); 1711 break; 1712 case V4L2_CTRL_TYPE_BITMASK: 1713 pr_cont("0x%08x", *ptr.p_s32); 1714 break; 1715 case V4L2_CTRL_TYPE_INTEGER64: 1716 pr_cont("%lld", *ptr.p_s64); 1717 break; 1718 case V4L2_CTRL_TYPE_STRING: 1719 pr_cont("%s", ptr.p_char); 1720 break; 1721 case V4L2_CTRL_TYPE_U8: 1722 pr_cont("%u", (unsigned)*ptr.p_u8); 1723 break; 1724 case V4L2_CTRL_TYPE_U16: 1725 pr_cont("%u", (unsigned)*ptr.p_u16); 1726 break; 1727 case V4L2_CTRL_TYPE_U32: 1728 pr_cont("%u", (unsigned)*ptr.p_u32); 1729 break; 1730 default: 1731 pr_cont("unknown type %d", ctrl->type); 1732 break; 1733 } 1734} 1735 1736/* 1737 * Round towards the closest legal value. Be careful when we are 1738 * close to the maximum range of the control type to prevent 1739 * wrap-arounds. 1740 */ 1741#define ROUND_TO_RANGE(val, offset_type, ctrl) \ 1742({ \ 1743 offset_type offset; \ 1744 if ((ctrl)->maximum >= 0 && \ 1745 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \ 1746 val = (ctrl)->maximum; \ 1747 else \ 1748 val += (s32)((ctrl)->step / 2); \ 1749 val = clamp_t(typeof(val), val, \ 1750 (ctrl)->minimum, (ctrl)->maximum); \ 1751 offset = (val) - (ctrl)->minimum; \ 1752 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \ 1753 val = (ctrl)->minimum + offset; \ 1754 0; \ 1755}) 1756 1757/* Validate a new control */ 1758 1759#define zero_padding(s) \ 1760 memset(&(s).padding, 0, sizeof((s).padding)) 1761#define zero_reserved(s) \ 1762 memset(&(s).reserved, 0, sizeof((s).reserved)) 1763 1764/* 1765 * Compound controls validation requires setting unused fields/flags to zero 1766 * in order to properly detect unchanged controls with std_equal's memcmp. 1767 */ 1768static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx, 1769 union v4l2_ctrl_ptr ptr) 1770{ 1771 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params; 1772 struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header; 1773 struct v4l2_ctrl_h264_slice_params *p_h264_slice_params; 1774 struct v4l2_ctrl_h264_decode_params *p_h264_dec_params; 1775 struct v4l2_ctrl_hevc_sps *p_hevc_sps; 1776 struct v4l2_ctrl_hevc_pps *p_hevc_pps; 1777 struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params; 1778 struct v4l2_area *area; 1779 void *p = ptr.p + idx * ctrl->elem_size; 1780 unsigned int i; 1781 1782 switch ((u32)ctrl->type) { 1783 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS: 1784 p_mpeg2_slice_params = p; 1785 1786 switch (p_mpeg2_slice_params->sequence.chroma_format) { 1787 case 1: /* 4:2:0 */ 1788 case 2: /* 4:2:2 */ 1789 case 3: /* 4:4:4 */ 1790 break; 1791 default: 1792 return -EINVAL; 1793 } 1794 1795 switch (p_mpeg2_slice_params->picture.intra_dc_precision) { 1796 case 0: /* 8 bits */ 1797 case 1: /* 9 bits */ 1798 case 2: /* 10 bits */ 1799 case 3: /* 11 bits */ 1800 break; 1801 default: 1802 return -EINVAL; 1803 } 1804 1805 switch (p_mpeg2_slice_params->picture.picture_structure) { 1806 case 1: /* interlaced top field */ 1807 case 2: /* interlaced bottom field */ 1808 case 3: /* progressive */ 1809 break; 1810 default: 1811 return -EINVAL; 1812 } 1813 1814 switch (p_mpeg2_slice_params->picture.picture_coding_type) { 1815 case V4L2_MPEG2_PICTURE_CODING_TYPE_I: 1816 case V4L2_MPEG2_PICTURE_CODING_TYPE_P: 1817 case V4L2_MPEG2_PICTURE_CODING_TYPE_B: 1818 break; 1819 default: 1820 return -EINVAL; 1821 } 1822 1823 break; 1824 1825 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION: 1826 break; 1827 1828 case V4L2_CTRL_TYPE_FWHT_PARAMS: 1829 break; 1830 1831 case V4L2_CTRL_TYPE_H264_SPS: 1832 case V4L2_CTRL_TYPE_H264_PPS: 1833 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: 1834 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS: 1835 break; 1836 1837 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS: 1838 p_h264_slice_params = p; 1839 1840 zero_reserved(*p_h264_slice_params); 1841 break; 1842 1843 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS: 1844 p_h264_dec_params = p; 1845 1846 for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) { 1847 struct v4l2_h264_dpb_entry *dpb_entry = 1848 &p_h264_dec_params->dpb[i]; 1849 1850 zero_reserved(*dpb_entry); 1851 } 1852 zero_reserved(*p_h264_dec_params); 1853 break; 1854 1855 case V4L2_CTRL_TYPE_VP8_FRAME_HEADER: 1856 p_vp8_frame_header = p; 1857 1858 switch (p_vp8_frame_header->num_dct_parts) { 1859 case 1: 1860 case 2: 1861 case 4: 1862 case 8: 1863 break; 1864 default: 1865 return -EINVAL; 1866 } 1867 zero_padding(p_vp8_frame_header->segment_header); 1868 zero_padding(p_vp8_frame_header->lf_header); 1869 zero_padding(p_vp8_frame_header->quant_header); 1870 zero_padding(p_vp8_frame_header->entropy_header); 1871 zero_padding(p_vp8_frame_header->coder_state); 1872 break; 1873 1874 case V4L2_CTRL_TYPE_HEVC_SPS: 1875 p_hevc_sps = p; 1876 1877 if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) { 1878 p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0; 1879 p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0; 1880 p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0; 1881 p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0; 1882 } 1883 1884 if (!(p_hevc_sps->flags & 1885 V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT)) 1886 p_hevc_sps->num_long_term_ref_pics_sps = 0; 1887 break; 1888 1889 case V4L2_CTRL_TYPE_HEVC_PPS: 1890 p_hevc_pps = p; 1891 1892 if (!(p_hevc_pps->flags & 1893 V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED)) 1894 p_hevc_pps->diff_cu_qp_delta_depth = 0; 1895 1896 if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) { 1897 p_hevc_pps->num_tile_columns_minus1 = 0; 1898 p_hevc_pps->num_tile_rows_minus1 = 0; 1899 memset(&p_hevc_pps->column_width_minus1, 0, 1900 sizeof(p_hevc_pps->column_width_minus1)); 1901 memset(&p_hevc_pps->row_height_minus1, 0, 1902 sizeof(p_hevc_pps->row_height_minus1)); 1903 1904 p_hevc_pps->flags &= 1905 ~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED; 1906 } 1907 1908 if (p_hevc_pps->flags & 1909 V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) { 1910 p_hevc_pps->pps_beta_offset_div2 = 0; 1911 p_hevc_pps->pps_tc_offset_div2 = 0; 1912 } 1913 1914 zero_padding(*p_hevc_pps); 1915 break; 1916 1917 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS: 1918 p_hevc_slice_params = p; 1919 1920 if (p_hevc_slice_params->num_active_dpb_entries > 1921 V4L2_HEVC_DPB_ENTRIES_NUM_MAX) 1922 return -EINVAL; 1923 1924 zero_padding(p_hevc_slice_params->pred_weight_table); 1925 1926 for (i = 0; i < p_hevc_slice_params->num_active_dpb_entries; 1927 i++) { 1928 struct v4l2_hevc_dpb_entry *dpb_entry = 1929 &p_hevc_slice_params->dpb[i]; 1930 1931 zero_padding(*dpb_entry); 1932 } 1933 1934 zero_padding(*p_hevc_slice_params); 1935 break; 1936 1937 case V4L2_CTRL_TYPE_AREA: 1938 area = p; 1939 if (!area->width || !area->height) 1940 return -EINVAL; 1941 break; 1942 1943 default: 1944 return -EINVAL; 1945 } 1946 1947 return 0; 1948} 1949 1950static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx, 1951 union v4l2_ctrl_ptr ptr) 1952{ 1953 size_t len; 1954 u64 offset; 1955 s64 val; 1956 1957 switch ((u32)ctrl->type) { 1958 case V4L2_CTRL_TYPE_INTEGER: 1959 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl); 1960 case V4L2_CTRL_TYPE_INTEGER64: 1961 /* 1962 * We can't use the ROUND_TO_RANGE define here due to 1963 * the u64 divide that needs special care. 1964 */ 1965 val = ptr.p_s64[idx]; 1966 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2)) 1967 val = ctrl->maximum; 1968 else 1969 val += (s64)(ctrl->step / 2); 1970 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum); 1971 offset = val - ctrl->minimum; 1972 do_div(offset, ctrl->step); 1973 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step; 1974 return 0; 1975 case V4L2_CTRL_TYPE_U8: 1976 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl); 1977 case V4L2_CTRL_TYPE_U16: 1978 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl); 1979 case V4L2_CTRL_TYPE_U32: 1980 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl); 1981 1982 case V4L2_CTRL_TYPE_BOOLEAN: 1983 ptr.p_s32[idx] = !!ptr.p_s32[idx]; 1984 return 0; 1985 1986 case V4L2_CTRL_TYPE_MENU: 1987 case V4L2_CTRL_TYPE_INTEGER_MENU: 1988 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum) 1989 return -ERANGE; 1990 if (ptr.p_s32[idx] < BITS_PER_LONG_LONG && 1991 (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx]))) 1992 return -EINVAL; 1993 if (ctrl->type == V4L2_CTRL_TYPE_MENU && 1994 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0') 1995 return -EINVAL; 1996 return 0; 1997 1998 case V4L2_CTRL_TYPE_BITMASK: 1999 ptr.p_s32[idx] &= ctrl->maximum; 2000 return 0; 2001 2002 case V4L2_CTRL_TYPE_BUTTON: 2003 case V4L2_CTRL_TYPE_CTRL_CLASS: 2004 ptr.p_s32[idx] = 0; 2005 return 0; 2006 2007 case V4L2_CTRL_TYPE_STRING: 2008 idx *= ctrl->elem_size; 2009 len = strlen(ptr.p_char + idx); 2010 if (len < ctrl->minimum) 2011 return -ERANGE; 2012 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step) 2013 return -ERANGE; 2014 return 0; 2015 2016 default: 2017 return std_validate_compound(ctrl, idx, ptr); 2018 } 2019} 2020 2021static const struct v4l2_ctrl_type_ops std_type_ops = { 2022 .equal = std_equal, 2023 .init = std_init, 2024 .log = std_log, 2025 .validate = std_validate, 2026}; 2027 2028/* Helper function: copy the given control value back to the caller */ 2029static int ptr_to_user(struct v4l2_ext_control *c, 2030 struct v4l2_ctrl *ctrl, 2031 union v4l2_ctrl_ptr ptr) 2032{ 2033 u32 len; 2034 2035 if (ctrl->is_ptr && !ctrl->is_string) 2036 return copy_to_user(c->ptr, ptr.p_const, c->size) ? 2037 -EFAULT : 0; 2038 2039 switch (ctrl->type) { 2040 case V4L2_CTRL_TYPE_STRING: 2041 len = strlen(ptr.p_char); 2042 if (c->size < len + 1) { 2043 c->size = ctrl->elem_size; 2044 return -ENOSPC; 2045 } 2046 return copy_to_user(c->string, ptr.p_char, len + 1) ? 2047 -EFAULT : 0; 2048 case V4L2_CTRL_TYPE_INTEGER64: 2049 c->value64 = *ptr.p_s64; 2050 break; 2051 default: 2052 c->value = *ptr.p_s32; 2053 break; 2054 } 2055 return 0; 2056} 2057 2058/* Helper function: copy the current control value back to the caller */ 2059static int cur_to_user(struct v4l2_ext_control *c, 2060 struct v4l2_ctrl *ctrl) 2061{ 2062 return ptr_to_user(c, ctrl, ctrl->p_cur); 2063} 2064 2065/* Helper function: copy the new control value back to the caller */ 2066static int new_to_user(struct v4l2_ext_control *c, 2067 struct v4l2_ctrl *ctrl) 2068{ 2069 return ptr_to_user(c, ctrl, ctrl->p_new); 2070} 2071 2072/* Helper function: copy the request value back to the caller */ 2073static int req_to_user(struct v4l2_ext_control *c, 2074 struct v4l2_ctrl_ref *ref) 2075{ 2076 return ptr_to_user(c, ref->ctrl, ref->p_req); 2077} 2078 2079/* Helper function: copy the initial control value back to the caller */ 2080static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl) 2081{ 2082 int idx; 2083 2084 for (idx = 0; idx < ctrl->elems; idx++) 2085 ctrl->type_ops->init(ctrl, idx, ctrl->p_new); 2086 2087 return ptr_to_user(c, ctrl, ctrl->p_new); 2088} 2089 2090/* Helper function: copy the caller-provider value to the given control value */ 2091static int user_to_ptr(struct v4l2_ext_control *c, 2092 struct v4l2_ctrl *ctrl, 2093 union v4l2_ctrl_ptr ptr) 2094{ 2095 int ret; 2096 u32 size; 2097 2098 ctrl->is_new = 1; 2099 if (ctrl->is_ptr && !ctrl->is_string) { 2100 unsigned idx; 2101 2102 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0; 2103 if (ret || !ctrl->is_array) 2104 return ret; 2105 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++) 2106 ctrl->type_ops->init(ctrl, idx, ptr); 2107 return 0; 2108 } 2109 2110 switch (ctrl->type) { 2111 case V4L2_CTRL_TYPE_INTEGER64: 2112 *ptr.p_s64 = c->value64; 2113 break; 2114 case V4L2_CTRL_TYPE_STRING: 2115 size = c->size; 2116 if (size == 0) 2117 return -ERANGE; 2118 if (size > ctrl->maximum + 1) 2119 size = ctrl->maximum + 1; 2120 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0; 2121 if (!ret) { 2122 char last = ptr.p_char[size - 1]; 2123 2124 ptr.p_char[size - 1] = 0; 2125 /* If the string was longer than ctrl->maximum, 2126 then return an error. */ 2127 if (strlen(ptr.p_char) == ctrl->maximum && last) 2128 return -ERANGE; 2129 } 2130 return ret; 2131 default: 2132 *ptr.p_s32 = c->value; 2133 break; 2134 } 2135 return 0; 2136} 2137 2138/* Helper function: copy the caller-provider value as the new control value */ 2139static int user_to_new(struct v4l2_ext_control *c, 2140 struct v4l2_ctrl *ctrl) 2141{ 2142 return user_to_ptr(c, ctrl, ctrl->p_new); 2143} 2144 2145/* Copy the one value to another. */ 2146static void ptr_to_ptr(struct v4l2_ctrl *ctrl, 2147 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to) 2148{ 2149 if (ctrl == NULL) 2150 return; 2151 memcpy(to.p, from.p_const, ctrl->elems * ctrl->elem_size); 2152} 2153 2154/* Copy the new value to the current value. */ 2155static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags) 2156{ 2157 bool changed; 2158 2159 if (ctrl == NULL) 2160 return; 2161 2162 /* has_changed is set by cluster_changed */ 2163 changed = ctrl->has_changed; 2164 if (changed) 2165 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur); 2166 2167 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) { 2168 /* Note: CH_FLAGS is only set for auto clusters. */ 2169 ctrl->flags &= 2170 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE); 2171 if (!is_cur_manual(ctrl->cluster[0])) { 2172 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; 2173 if (ctrl->cluster[0]->has_volatiles) 2174 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; 2175 } 2176 fh = NULL; 2177 } 2178 if (changed || ch_flags) { 2179 /* If a control was changed that was not one of the controls 2180 modified by the application, then send the event to all. */ 2181 if (!ctrl->is_new) 2182 fh = NULL; 2183 send_event(fh, ctrl, 2184 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags); 2185 if (ctrl->call_notify && changed && ctrl->handler->notify) 2186 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv); 2187 } 2188} 2189 2190/* Copy the current value to the new value */ 2191static void cur_to_new(struct v4l2_ctrl *ctrl) 2192{ 2193 if (ctrl == NULL) 2194 return; 2195 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new); 2196} 2197 2198/* Copy the new value to the request value */ 2199static void new_to_req(struct v4l2_ctrl_ref *ref) 2200{ 2201 if (!ref) 2202 return; 2203 ptr_to_ptr(ref->ctrl, ref->ctrl->p_new, ref->p_req); 2204 ref->valid_p_req = true; 2205} 2206 2207/* Copy the current value to the request value */ 2208static void cur_to_req(struct v4l2_ctrl_ref *ref) 2209{ 2210 if (!ref) 2211 return; 2212 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->p_req); 2213 ref->valid_p_req = true; 2214} 2215 2216/* Copy the request value to the new value */ 2217static void req_to_new(struct v4l2_ctrl_ref *ref) 2218{ 2219 if (!ref) 2220 return; 2221 if (ref->valid_p_req) 2222 ptr_to_ptr(ref->ctrl, ref->p_req, ref->ctrl->p_new); 2223 else 2224 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->ctrl->p_new); 2225} 2226 2227/* Return non-zero if one or more of the controls in the cluster has a new 2228 value that differs from the current value. */ 2229static int cluster_changed(struct v4l2_ctrl *master) 2230{ 2231 bool changed = false; 2232 unsigned idx; 2233 int i; 2234 2235 for (i = 0; i < master->ncontrols; i++) { 2236 struct v4l2_ctrl *ctrl = master->cluster[i]; 2237 bool ctrl_changed = false; 2238 2239 if (ctrl == NULL) 2240 continue; 2241 2242 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE) 2243 changed = ctrl_changed = true; 2244 2245 /* 2246 * Set has_changed to false to avoid generating 2247 * the event V4L2_EVENT_CTRL_CH_VALUE 2248 */ 2249 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { 2250 ctrl->has_changed = false; 2251 continue; 2252 } 2253 2254 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++) 2255 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx, 2256 ctrl->p_cur, ctrl->p_new); 2257 ctrl->has_changed = ctrl_changed; 2258 changed |= ctrl->has_changed; 2259 } 2260 return changed; 2261} 2262 2263/* Control range checking */ 2264static int check_range(enum v4l2_ctrl_type type, 2265 s64 min, s64 max, u64 step, s64 def) 2266{ 2267 switch (type) { 2268 case V4L2_CTRL_TYPE_BOOLEAN: 2269 if (step != 1 || max > 1 || min < 0) 2270 return -ERANGE; 2271 fallthrough; 2272 case V4L2_CTRL_TYPE_U8: 2273 case V4L2_CTRL_TYPE_U16: 2274 case V4L2_CTRL_TYPE_U32: 2275 case V4L2_CTRL_TYPE_INTEGER: 2276 case V4L2_CTRL_TYPE_INTEGER64: 2277 if (step == 0 || min > max || def < min || def > max) 2278 return -ERANGE; 2279 return 0; 2280 case V4L2_CTRL_TYPE_BITMASK: 2281 if (step || min || !max || (def & ~max)) 2282 return -ERANGE; 2283 return 0; 2284 case V4L2_CTRL_TYPE_MENU: 2285 case V4L2_CTRL_TYPE_INTEGER_MENU: 2286 if (min > max || def < min || def > max) 2287 return -ERANGE; 2288 /* Note: step == menu_skip_mask for menu controls. 2289 So here we check if the default value is masked out. */ 2290 if (step && ((1 << def) & step)) 2291 return -EINVAL; 2292 return 0; 2293 case V4L2_CTRL_TYPE_STRING: 2294 if (min > max || min < 0 || step < 1 || def) 2295 return -ERANGE; 2296 return 0; 2297 default: 2298 return 0; 2299 } 2300} 2301 2302/* Validate a new control */ 2303static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new) 2304{ 2305 unsigned idx; 2306 int err = 0; 2307 2308 for (idx = 0; !err && idx < ctrl->elems; idx++) 2309 err = ctrl->type_ops->validate(ctrl, idx, p_new); 2310 return err; 2311} 2312 2313static inline u32 node2id(struct list_head *node) 2314{ 2315 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id; 2316} 2317 2318/* Set the handler's error code if it wasn't set earlier already */ 2319static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err) 2320{ 2321 if (hdl->error == 0) 2322 hdl->error = err; 2323 return err; 2324} 2325 2326/* Initialize the handler */ 2327int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl, 2328 unsigned nr_of_controls_hint, 2329 struct lock_class_key *key, const char *name) 2330{ 2331 mutex_init(&hdl->_lock); 2332 hdl->lock = &hdl->_lock; 2333 lockdep_set_class_and_name(hdl->lock, key, name); 2334 INIT_LIST_HEAD(&hdl->ctrls); 2335 INIT_LIST_HEAD(&hdl->ctrl_refs); 2336 INIT_LIST_HEAD(&hdl->requests); 2337 INIT_LIST_HEAD(&hdl->requests_queued); 2338 hdl->request_is_queued = false; 2339 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8; 2340 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets, 2341 sizeof(hdl->buckets[0]), 2342 GFP_KERNEL | __GFP_ZERO); 2343 hdl->error = hdl->buckets ? 0 : -ENOMEM; 2344 media_request_object_init(&hdl->req_obj); 2345 return hdl->error; 2346} 2347EXPORT_SYMBOL(v4l2_ctrl_handler_init_class); 2348 2349/* Free all controls and control refs */ 2350void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl) 2351{ 2352 struct v4l2_ctrl_ref *ref, *next_ref; 2353 struct v4l2_ctrl *ctrl, *next_ctrl; 2354 struct v4l2_subscribed_event *sev, *next_sev; 2355 2356 if (hdl == NULL || hdl->buckets == NULL) 2357 return; 2358 2359 /* 2360 * If the main handler is freed and it is used by handler objects in 2361 * outstanding requests, then unbind and put those objects before 2362 * freeing the main handler. 2363 * 2364 * The main handler can be identified by having a NULL ops pointer in 2365 * the request object. 2366 */ 2367 if (!hdl->req_obj.ops && !list_empty(&hdl->requests)) { 2368 struct v4l2_ctrl_handler *req, *next_req; 2369 2370 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) { 2371 media_request_object_unbind(&req->req_obj); 2372 media_request_object_put(&req->req_obj); 2373 } 2374 } 2375 mutex_lock(hdl->lock); 2376 /* Free all nodes */ 2377 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) { 2378 list_del(&ref->node); 2379 kfree(ref); 2380 } 2381 /* Free all controls owned by the handler */ 2382 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) { 2383 list_del(&ctrl->node); 2384 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node) 2385 list_del(&sev->node); 2386 kvfree(ctrl); 2387 } 2388 kvfree(hdl->buckets); 2389 hdl->buckets = NULL; 2390 hdl->cached = NULL; 2391 hdl->error = 0; 2392 mutex_unlock(hdl->lock); 2393 mutex_destroy(&hdl->_lock); 2394} 2395EXPORT_SYMBOL(v4l2_ctrl_handler_free); 2396 2397/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer 2398 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing 2399 with applications that do not use the NEXT_CTRL flag. 2400 2401 We just find the n-th private user control. It's O(N), but that should not 2402 be an issue in this particular case. */ 2403static struct v4l2_ctrl_ref *find_private_ref( 2404 struct v4l2_ctrl_handler *hdl, u32 id) 2405{ 2406 struct v4l2_ctrl_ref *ref; 2407 2408 id -= V4L2_CID_PRIVATE_BASE; 2409 list_for_each_entry(ref, &hdl->ctrl_refs, node) { 2410 /* Search for private user controls that are compatible with 2411 VIDIOC_G/S_CTRL. */ 2412 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER && 2413 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) { 2414 if (!ref->ctrl->is_int) 2415 continue; 2416 if (id == 0) 2417 return ref; 2418 id--; 2419 } 2420 } 2421 return NULL; 2422} 2423 2424/* Find a control with the given ID. */ 2425static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id) 2426{ 2427 struct v4l2_ctrl_ref *ref; 2428 int bucket; 2429 2430 id &= V4L2_CTRL_ID_MASK; 2431 2432 /* Old-style private controls need special handling */ 2433 if (id >= V4L2_CID_PRIVATE_BASE) 2434 return find_private_ref(hdl, id); 2435 bucket = id % hdl->nr_of_buckets; 2436 2437 /* Simple optimization: cache the last control found */ 2438 if (hdl->cached && hdl->cached->ctrl->id == id) 2439 return hdl->cached; 2440 2441 /* Not in cache, search the hash */ 2442 ref = hdl->buckets ? hdl->buckets[bucket] : NULL; 2443 while (ref && ref->ctrl->id != id) 2444 ref = ref->next; 2445 2446 if (ref) 2447 hdl->cached = ref; /* cache it! */ 2448 return ref; 2449} 2450 2451/* Find a control with the given ID. Take the handler's lock first. */ 2452static struct v4l2_ctrl_ref *find_ref_lock( 2453 struct v4l2_ctrl_handler *hdl, u32 id) 2454{ 2455 struct v4l2_ctrl_ref *ref = NULL; 2456 2457 if (hdl) { 2458 mutex_lock(hdl->lock); 2459 ref = find_ref(hdl, id); 2460 mutex_unlock(hdl->lock); 2461 } 2462 return ref; 2463} 2464 2465/* Find a control with the given ID. */ 2466struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) 2467{ 2468 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); 2469 2470 return ref ? ref->ctrl : NULL; 2471} 2472EXPORT_SYMBOL(v4l2_ctrl_find); 2473 2474/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */ 2475static int handler_new_ref(struct v4l2_ctrl_handler *hdl, 2476 struct v4l2_ctrl *ctrl, 2477 struct v4l2_ctrl_ref **ctrl_ref, 2478 bool from_other_dev, bool allocate_req) 2479{ 2480 struct v4l2_ctrl_ref *ref; 2481 struct v4l2_ctrl_ref *new_ref; 2482 u32 id = ctrl->id; 2483 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1; 2484 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */ 2485 unsigned int size_extra_req = 0; 2486 2487 if (ctrl_ref) 2488 *ctrl_ref = NULL; 2489 2490 /* 2491 * Automatically add the control class if it is not yet present and 2492 * the new control is not a compound control. 2493 */ 2494 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES && 2495 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL) 2496 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0)) 2497 return hdl->error; 2498 2499 if (hdl->error) 2500 return hdl->error; 2501 2502 if (allocate_req) 2503 size_extra_req = ctrl->elems * ctrl->elem_size; 2504 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL); 2505 if (!new_ref) 2506 return handler_set_err(hdl, -ENOMEM); 2507 new_ref->ctrl = ctrl; 2508 new_ref->from_other_dev = from_other_dev; 2509 if (size_extra_req) 2510 new_ref->p_req.p = &new_ref[1]; 2511 2512 INIT_LIST_HEAD(&new_ref->node); 2513 2514 mutex_lock(hdl->lock); 2515 2516 /* Add immediately at the end of the list if the list is empty, or if 2517 the last element in the list has a lower ID. 2518 This ensures that when elements are added in ascending order the 2519 insertion is an O(1) operation. */ 2520 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) { 2521 list_add_tail(&new_ref->node, &hdl->ctrl_refs); 2522 goto insert_in_hash; 2523 } 2524 2525 /* Find insert position in sorted list */ 2526 list_for_each_entry(ref, &hdl->ctrl_refs, node) { 2527 if (ref->ctrl->id < id) 2528 continue; 2529 /* Don't add duplicates */ 2530 if (ref->ctrl->id == id) { 2531 kfree(new_ref); 2532 goto unlock; 2533 } 2534 list_add(&new_ref->node, ref->node.prev); 2535 break; 2536 } 2537 2538insert_in_hash: 2539 /* Insert the control node in the hash */ 2540 new_ref->next = hdl->buckets[bucket]; 2541 hdl->buckets[bucket] = new_ref; 2542 if (ctrl_ref) 2543 *ctrl_ref = new_ref; 2544 if (ctrl->handler == hdl) { 2545 /* By default each control starts in a cluster of its own. 2546 * new_ref->ctrl is basically a cluster array with one 2547 * element, so that's perfect to use as the cluster pointer. 2548 * But only do this for the handler that owns the control. 2549 */ 2550 ctrl->cluster = &new_ref->ctrl; 2551 ctrl->ncontrols = 1; 2552 } 2553 2554unlock: 2555 mutex_unlock(hdl->lock); 2556 return 0; 2557} 2558 2559/* Add a new control */ 2560static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, 2561 const struct v4l2_ctrl_ops *ops, 2562 const struct v4l2_ctrl_type_ops *type_ops, 2563 u32 id, const char *name, enum v4l2_ctrl_type type, 2564 s64 min, s64 max, u64 step, s64 def, 2565 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size, 2566 u32 flags, const char * const *qmenu, 2567 const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def, 2568 void *priv) 2569{ 2570 struct v4l2_ctrl *ctrl; 2571 unsigned sz_extra; 2572 unsigned nr_of_dims = 0; 2573 unsigned elems = 1; 2574 bool is_array; 2575 unsigned tot_ctrl_size; 2576 unsigned idx; 2577 void *data; 2578 int err; 2579 2580 if (hdl->error) 2581 return NULL; 2582 2583 while (dims && dims[nr_of_dims]) { 2584 elems *= dims[nr_of_dims]; 2585 nr_of_dims++; 2586 if (nr_of_dims == V4L2_CTRL_MAX_DIMS) 2587 break; 2588 } 2589 is_array = nr_of_dims > 0; 2590 2591 /* Prefill elem_size for all types handled by std_type_ops */ 2592 switch ((u32)type) { 2593 case V4L2_CTRL_TYPE_INTEGER64: 2594 elem_size = sizeof(s64); 2595 break; 2596 case V4L2_CTRL_TYPE_STRING: 2597 elem_size = max + 1; 2598 break; 2599 case V4L2_CTRL_TYPE_U8: 2600 elem_size = sizeof(u8); 2601 break; 2602 case V4L2_CTRL_TYPE_U16: 2603 elem_size = sizeof(u16); 2604 break; 2605 case V4L2_CTRL_TYPE_U32: 2606 elem_size = sizeof(u32); 2607 break; 2608 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS: 2609 elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params); 2610 break; 2611 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION: 2612 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization); 2613 break; 2614 case V4L2_CTRL_TYPE_FWHT_PARAMS: 2615 elem_size = sizeof(struct v4l2_ctrl_fwht_params); 2616 break; 2617 case V4L2_CTRL_TYPE_H264_SPS: 2618 elem_size = sizeof(struct v4l2_ctrl_h264_sps); 2619 break; 2620 case V4L2_CTRL_TYPE_H264_PPS: 2621 elem_size = sizeof(struct v4l2_ctrl_h264_pps); 2622 break; 2623 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX: 2624 elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix); 2625 break; 2626 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS: 2627 elem_size = sizeof(struct v4l2_ctrl_h264_slice_params); 2628 break; 2629 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS: 2630 elem_size = sizeof(struct v4l2_ctrl_h264_decode_params); 2631 break; 2632 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS: 2633 elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights); 2634 break; 2635 case V4L2_CTRL_TYPE_VP8_FRAME_HEADER: 2636 elem_size = sizeof(struct v4l2_ctrl_vp8_frame_header); 2637 break; 2638 case V4L2_CTRL_TYPE_HEVC_SPS: 2639 elem_size = sizeof(struct v4l2_ctrl_hevc_sps); 2640 break; 2641 case V4L2_CTRL_TYPE_HEVC_PPS: 2642 elem_size = sizeof(struct v4l2_ctrl_hevc_pps); 2643 break; 2644 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS: 2645 elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params); 2646 break; 2647 case V4L2_CTRL_TYPE_AREA: 2648 elem_size = sizeof(struct v4l2_area); 2649 break; 2650 default: 2651 if (type < V4L2_CTRL_COMPOUND_TYPES) 2652 elem_size = sizeof(s32); 2653 break; 2654 } 2655 tot_ctrl_size = elem_size * elems; 2656 2657 /* Sanity checks */ 2658 if (id == 0 || name == NULL || !elem_size || 2659 id >= V4L2_CID_PRIVATE_BASE || 2660 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) || 2661 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) { 2662 handler_set_err(hdl, -ERANGE); 2663 return NULL; 2664 } 2665 err = check_range(type, min, max, step, def); 2666 if (err) { 2667 handler_set_err(hdl, err); 2668 return NULL; 2669 } 2670 if (is_array && 2671 (type == V4L2_CTRL_TYPE_BUTTON || 2672 type == V4L2_CTRL_TYPE_CTRL_CLASS)) { 2673 handler_set_err(hdl, -EINVAL); 2674 return NULL; 2675 } 2676 2677 sz_extra = 0; 2678 if (type == V4L2_CTRL_TYPE_BUTTON) 2679 flags |= V4L2_CTRL_FLAG_WRITE_ONLY | 2680 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE; 2681 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS) 2682 flags |= V4L2_CTRL_FLAG_READ_ONLY; 2683 else if (type == V4L2_CTRL_TYPE_INTEGER64 || 2684 type == V4L2_CTRL_TYPE_STRING || 2685 type >= V4L2_CTRL_COMPOUND_TYPES || 2686 is_array) 2687 sz_extra += 2 * tot_ctrl_size; 2688 2689 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) 2690 sz_extra += elem_size; 2691 2692 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL); 2693 if (ctrl == NULL) { 2694 handler_set_err(hdl, -ENOMEM); 2695 return NULL; 2696 } 2697 2698 INIT_LIST_HEAD(&ctrl->node); 2699 INIT_LIST_HEAD(&ctrl->ev_subs); 2700 ctrl->handler = hdl; 2701 ctrl->ops = ops; 2702 ctrl->type_ops = type_ops ? type_ops : &std_type_ops; 2703 ctrl->id = id; 2704 ctrl->name = name; 2705 ctrl->type = type; 2706 ctrl->flags = flags; 2707 ctrl->minimum = min; 2708 ctrl->maximum = max; 2709 ctrl->step = step; 2710 ctrl->default_value = def; 2711 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING; 2712 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string; 2713 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64; 2714 ctrl->is_array = is_array; 2715 ctrl->elems = elems; 2716 ctrl->nr_of_dims = nr_of_dims; 2717 if (nr_of_dims) 2718 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0])); 2719 ctrl->elem_size = elem_size; 2720 if (type == V4L2_CTRL_TYPE_MENU) 2721 ctrl->qmenu = qmenu; 2722 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU) 2723 ctrl->qmenu_int = qmenu_int; 2724 ctrl->priv = priv; 2725 ctrl->cur.val = ctrl->val = def; 2726 data = &ctrl[1]; 2727 2728 if (!ctrl->is_int) { 2729 ctrl->p_new.p = data; 2730 ctrl->p_cur.p = data + tot_ctrl_size; 2731 } else { 2732 ctrl->p_new.p = &ctrl->val; 2733 ctrl->p_cur.p = &ctrl->cur.val; 2734 } 2735 2736 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) { 2737 ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size; 2738 memcpy(ctrl->p_def.p, p_def.p_const, elem_size); 2739 } 2740 2741 for (idx = 0; idx < elems; idx++) { 2742 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur); 2743 ctrl->type_ops->init(ctrl, idx, ctrl->p_new); 2744 } 2745 2746 if (handler_new_ref(hdl, ctrl, NULL, false, false)) { 2747 kvfree(ctrl); 2748 return NULL; 2749 } 2750 mutex_lock(hdl->lock); 2751 list_add_tail(&ctrl->node, &hdl->ctrls); 2752 mutex_unlock(hdl->lock); 2753 return ctrl; 2754} 2755 2756struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl, 2757 const struct v4l2_ctrl_config *cfg, void *priv) 2758{ 2759 bool is_menu; 2760 struct v4l2_ctrl *ctrl; 2761 const char *name = cfg->name; 2762 const char * const *qmenu = cfg->qmenu; 2763 const s64 *qmenu_int = cfg->qmenu_int; 2764 enum v4l2_ctrl_type type = cfg->type; 2765 u32 flags = cfg->flags; 2766 s64 min = cfg->min; 2767 s64 max = cfg->max; 2768 u64 step = cfg->step; 2769 s64 def = cfg->def; 2770 2771 if (name == NULL) 2772 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step, 2773 &def, &flags); 2774 2775 is_menu = (type == V4L2_CTRL_TYPE_MENU || 2776 type == V4L2_CTRL_TYPE_INTEGER_MENU); 2777 if (is_menu) 2778 WARN_ON(step); 2779 else 2780 WARN_ON(cfg->menu_skip_mask); 2781 if (type == V4L2_CTRL_TYPE_MENU && !qmenu) { 2782 qmenu = v4l2_ctrl_get_menu(cfg->id); 2783 } else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) { 2784 handler_set_err(hdl, -EINVAL); 2785 return NULL; 2786 } 2787 2788 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name, 2789 type, min, max, 2790 is_menu ? cfg->menu_skip_mask : step, def, 2791 cfg->dims, cfg->elem_size, 2792 flags, qmenu, qmenu_int, cfg->p_def, priv); 2793 if (ctrl) 2794 ctrl->is_private = cfg->is_private; 2795 return ctrl; 2796} 2797EXPORT_SYMBOL(v4l2_ctrl_new_custom); 2798 2799/* Helper function for standard non-menu controls */ 2800struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl, 2801 const struct v4l2_ctrl_ops *ops, 2802 u32 id, s64 min, s64 max, u64 step, s64 def) 2803{ 2804 const char *name; 2805 enum v4l2_ctrl_type type; 2806 u32 flags; 2807 2808 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); 2809 if (type == V4L2_CTRL_TYPE_MENU || 2810 type == V4L2_CTRL_TYPE_INTEGER_MENU || 2811 type >= V4L2_CTRL_COMPOUND_TYPES) { 2812 handler_set_err(hdl, -EINVAL); 2813 return NULL; 2814 } 2815 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 2816 min, max, step, def, NULL, 0, 2817 flags, NULL, NULL, ptr_null, NULL); 2818} 2819EXPORT_SYMBOL(v4l2_ctrl_new_std); 2820 2821/* Helper function for standard menu controls */ 2822struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl, 2823 const struct v4l2_ctrl_ops *ops, 2824 u32 id, u8 _max, u64 mask, u8 _def) 2825{ 2826 const char * const *qmenu = NULL; 2827 const s64 *qmenu_int = NULL; 2828 unsigned int qmenu_int_len = 0; 2829 const char *name; 2830 enum v4l2_ctrl_type type; 2831 s64 min; 2832 s64 max = _max; 2833 s64 def = _def; 2834 u64 step; 2835 u32 flags; 2836 2837 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); 2838 2839 if (type == V4L2_CTRL_TYPE_MENU) 2840 qmenu = v4l2_ctrl_get_menu(id); 2841 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU) 2842 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len); 2843 2844 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) { 2845 handler_set_err(hdl, -EINVAL); 2846 return NULL; 2847 } 2848 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 2849 0, max, mask, def, NULL, 0, 2850 flags, qmenu, qmenu_int, ptr_null, NULL); 2851} 2852EXPORT_SYMBOL(v4l2_ctrl_new_std_menu); 2853 2854/* Helper function for standard menu controls with driver defined menu */ 2855struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl, 2856 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max, 2857 u64 mask, u8 _def, const char * const *qmenu) 2858{ 2859 enum v4l2_ctrl_type type; 2860 const char *name; 2861 u32 flags; 2862 u64 step; 2863 s64 min; 2864 s64 max = _max; 2865 s64 def = _def; 2866 2867 /* v4l2_ctrl_new_std_menu_items() should only be called for 2868 * standard controls without a standard menu. 2869 */ 2870 if (v4l2_ctrl_get_menu(id)) { 2871 handler_set_err(hdl, -EINVAL); 2872 return NULL; 2873 } 2874 2875 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); 2876 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) { 2877 handler_set_err(hdl, -EINVAL); 2878 return NULL; 2879 } 2880 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 2881 0, max, mask, def, NULL, 0, 2882 flags, qmenu, NULL, ptr_null, NULL); 2883 2884} 2885EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items); 2886 2887/* Helper function for standard compound controls */ 2888struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl, 2889 const struct v4l2_ctrl_ops *ops, u32 id, 2890 const union v4l2_ctrl_ptr p_def) 2891{ 2892 const char *name; 2893 enum v4l2_ctrl_type type; 2894 u32 flags; 2895 s64 min, max, step, def; 2896 2897 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); 2898 if (type < V4L2_CTRL_COMPOUND_TYPES) { 2899 handler_set_err(hdl, -EINVAL); 2900 return NULL; 2901 } 2902 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 2903 min, max, step, def, NULL, 0, 2904 flags, NULL, NULL, p_def, NULL); 2905} 2906EXPORT_SYMBOL(v4l2_ctrl_new_std_compound); 2907 2908/* Helper function for standard integer menu controls */ 2909struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl, 2910 const struct v4l2_ctrl_ops *ops, 2911 u32 id, u8 _max, u8 _def, const s64 *qmenu_int) 2912{ 2913 const char *name; 2914 enum v4l2_ctrl_type type; 2915 s64 min; 2916 u64 step; 2917 s64 max = _max; 2918 s64 def = _def; 2919 u32 flags; 2920 2921 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); 2922 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) { 2923 handler_set_err(hdl, -EINVAL); 2924 return NULL; 2925 } 2926 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type, 2927 0, max, 0, def, NULL, 0, 2928 flags, NULL, qmenu_int, ptr_null, NULL); 2929} 2930EXPORT_SYMBOL(v4l2_ctrl_new_int_menu); 2931 2932/* Add the controls from another handler to our own. */ 2933int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, 2934 struct v4l2_ctrl_handler *add, 2935 bool (*filter)(const struct v4l2_ctrl *ctrl), 2936 bool from_other_dev) 2937{ 2938 struct v4l2_ctrl_ref *ref; 2939 int ret = 0; 2940 2941 /* Do nothing if either handler is NULL or if they are the same */ 2942 if (!hdl || !add || hdl == add) 2943 return 0; 2944 if (hdl->error) 2945 return hdl->error; 2946 mutex_lock(add->lock); 2947 list_for_each_entry(ref, &add->ctrl_refs, node) { 2948 struct v4l2_ctrl *ctrl = ref->ctrl; 2949 2950 /* Skip handler-private controls. */ 2951 if (ctrl->is_private) 2952 continue; 2953 /* And control classes */ 2954 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) 2955 continue; 2956 /* Filter any unwanted controls */ 2957 if (filter && !filter(ctrl)) 2958 continue; 2959 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false); 2960 if (ret) 2961 break; 2962 } 2963 mutex_unlock(add->lock); 2964 return ret; 2965} 2966EXPORT_SYMBOL(v4l2_ctrl_add_handler); 2967 2968bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl) 2969{ 2970 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX) 2971 return true; 2972 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX) 2973 return true; 2974 switch (ctrl->id) { 2975 case V4L2_CID_AUDIO_MUTE: 2976 case V4L2_CID_AUDIO_VOLUME: 2977 case V4L2_CID_AUDIO_BALANCE: 2978 case V4L2_CID_AUDIO_BASS: 2979 case V4L2_CID_AUDIO_TREBLE: 2980 case V4L2_CID_AUDIO_LOUDNESS: 2981 return true; 2982 default: 2983 break; 2984 } 2985 return false; 2986} 2987EXPORT_SYMBOL(v4l2_ctrl_radio_filter); 2988 2989/* Cluster controls */ 2990void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls) 2991{ 2992 bool has_volatiles = false; 2993 int i; 2994 2995 /* The first control is the master control and it must not be NULL */ 2996 if (WARN_ON(ncontrols == 0 || controls[0] == NULL)) 2997 return; 2998 2999 for (i = 0; i < ncontrols; i++) { 3000 if (controls[i]) { 3001 controls[i]->cluster = controls; 3002 controls[i]->ncontrols = ncontrols; 3003 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE) 3004 has_volatiles = true; 3005 } 3006 } 3007 controls[0]->has_volatiles = has_volatiles; 3008} 3009EXPORT_SYMBOL(v4l2_ctrl_cluster); 3010 3011void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls, 3012 u8 manual_val, bool set_volatile) 3013{ 3014 struct v4l2_ctrl *master = controls[0]; 3015 u32 flag = 0; 3016 int i; 3017 3018 v4l2_ctrl_cluster(ncontrols, controls); 3019 WARN_ON(ncontrols <= 1); 3020 WARN_ON(manual_val < master->minimum || manual_val > master->maximum); 3021 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl)); 3022 master->is_auto = true; 3023 master->has_volatiles = set_volatile; 3024 master->manual_mode_value = manual_val; 3025 master->flags |= V4L2_CTRL_FLAG_UPDATE; 3026 3027 if (!is_cur_manual(master)) 3028 flag = V4L2_CTRL_FLAG_INACTIVE | 3029 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0); 3030 3031 for (i = 1; i < ncontrols; i++) 3032 if (controls[i]) 3033 controls[i]->flags |= flag; 3034} 3035EXPORT_SYMBOL(v4l2_ctrl_auto_cluster); 3036 3037/* Activate/deactivate a control. */ 3038void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active) 3039{ 3040 /* invert since the actual flag is called 'inactive' */ 3041 bool inactive = !active; 3042 bool old; 3043 3044 if (ctrl == NULL) 3045 return; 3046 3047 if (inactive) 3048 /* set V4L2_CTRL_FLAG_INACTIVE */ 3049 old = test_and_set_bit(4, &ctrl->flags); 3050 else 3051 /* clear V4L2_CTRL_FLAG_INACTIVE */ 3052 old = test_and_clear_bit(4, &ctrl->flags); 3053 if (old != inactive) 3054 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); 3055} 3056EXPORT_SYMBOL(v4l2_ctrl_activate); 3057 3058void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed) 3059{ 3060 bool old; 3061 3062 if (ctrl == NULL) 3063 return; 3064 3065 lockdep_assert_held(ctrl->handler->lock); 3066 3067 if (grabbed) 3068 /* set V4L2_CTRL_FLAG_GRABBED */ 3069 old = test_and_set_bit(1, &ctrl->flags); 3070 else 3071 /* clear V4L2_CTRL_FLAG_GRABBED */ 3072 old = test_and_clear_bit(1, &ctrl->flags); 3073 if (old != grabbed) 3074 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); 3075} 3076EXPORT_SYMBOL(__v4l2_ctrl_grab); 3077 3078/* Log the control name and value */ 3079static void log_ctrl(const struct v4l2_ctrl *ctrl, 3080 const char *prefix, const char *colon) 3081{ 3082 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY)) 3083 return; 3084 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) 3085 return; 3086 3087 pr_info("%s%s%s: ", prefix, colon, ctrl->name); 3088 3089 ctrl->type_ops->log(ctrl); 3090 3091 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE | 3092 V4L2_CTRL_FLAG_GRABBED | 3093 V4L2_CTRL_FLAG_VOLATILE)) { 3094 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) 3095 pr_cont(" inactive"); 3096 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED) 3097 pr_cont(" grabbed"); 3098 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) 3099 pr_cont(" volatile"); 3100 } 3101 pr_cont("\n"); 3102} 3103 3104/* Log all controls owned by the handler */ 3105void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, 3106 const char *prefix) 3107{ 3108 struct v4l2_ctrl *ctrl; 3109 const char *colon = ""; 3110 int len; 3111 3112 if (hdl == NULL) 3113 return; 3114 if (prefix == NULL) 3115 prefix = ""; 3116 len = strlen(prefix); 3117 if (len && prefix[len - 1] != ' ') 3118 colon = ": "; 3119 mutex_lock(hdl->lock); 3120 list_for_each_entry(ctrl, &hdl->ctrls, node) 3121 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) 3122 log_ctrl(ctrl, prefix, colon); 3123 mutex_unlock(hdl->lock); 3124} 3125EXPORT_SYMBOL(v4l2_ctrl_handler_log_status); 3126 3127int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd) 3128{ 3129 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name); 3130 return 0; 3131} 3132EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status); 3133 3134/* Call s_ctrl for all controls owned by the handler */ 3135int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) 3136{ 3137 struct v4l2_ctrl *ctrl; 3138 int ret = 0; 3139 3140 if (hdl == NULL) 3141 return 0; 3142 3143 lockdep_assert_held(hdl->lock); 3144 3145 list_for_each_entry(ctrl, &hdl->ctrls, node) 3146 ctrl->done = false; 3147 3148 list_for_each_entry(ctrl, &hdl->ctrls, node) { 3149 struct v4l2_ctrl *master = ctrl->cluster[0]; 3150 int i; 3151 3152 /* Skip if this control was already handled by a cluster. */ 3153 /* Skip button controls and read-only controls. */ 3154 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON || 3155 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)) 3156 continue; 3157 3158 for (i = 0; i < master->ncontrols; i++) { 3159 if (master->cluster[i]) { 3160 cur_to_new(master->cluster[i]); 3161 master->cluster[i]->is_new = 1; 3162 master->cluster[i]->done = true; 3163 } 3164 } 3165 ret = call_op(master, s_ctrl); 3166 if (ret) 3167 break; 3168 } 3169 3170 return ret; 3171} 3172EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup); 3173 3174int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) 3175{ 3176 int ret; 3177 3178 if (hdl == NULL) 3179 return 0; 3180 3181 mutex_lock(hdl->lock); 3182 ret = __v4l2_ctrl_handler_setup(hdl); 3183 mutex_unlock(hdl->lock); 3184 3185 return ret; 3186} 3187EXPORT_SYMBOL(v4l2_ctrl_handler_setup); 3188 3189/* Implement VIDIOC_QUERY_EXT_CTRL */ 3190int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc) 3191{ 3192 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND; 3193 u32 id = qc->id & V4L2_CTRL_ID_MASK; 3194 struct v4l2_ctrl_ref *ref; 3195 struct v4l2_ctrl *ctrl; 3196 3197 if (hdl == NULL) 3198 return -EINVAL; 3199 3200 mutex_lock(hdl->lock); 3201 3202 /* Try to find it */ 3203 ref = find_ref(hdl, id); 3204 3205 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) { 3206 bool is_compound; 3207 /* Match any control that is not hidden */ 3208 unsigned mask = 1; 3209 bool match = false; 3210 3211 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) { 3212 /* Match any hidden control */ 3213 match = true; 3214 } else if ((qc->id & next_flags) == next_flags) { 3215 /* Match any control, compound or not */ 3216 mask = 0; 3217 } 3218 3219 /* Find the next control with ID > qc->id */ 3220 3221 /* Did we reach the end of the control list? */ 3222 if (id >= node2id(hdl->ctrl_refs.prev)) { 3223 ref = NULL; /* Yes, so there is no next control */ 3224 } else if (ref) { 3225 /* We found a control with the given ID, so just get 3226 the next valid one in the list. */ 3227 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) { 3228 is_compound = ref->ctrl->is_array || 3229 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES; 3230 if (id < ref->ctrl->id && 3231 (is_compound & mask) == match) 3232 break; 3233 } 3234 if (&ref->node == &hdl->ctrl_refs) 3235 ref = NULL; 3236 } else { 3237 /* No control with the given ID exists, so start 3238 searching for the next largest ID. We know there 3239 is one, otherwise the first 'if' above would have 3240 been true. */ 3241 list_for_each_entry(ref, &hdl->ctrl_refs, node) { 3242 is_compound = ref->ctrl->is_array || 3243 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES; 3244 if (id < ref->ctrl->id && 3245 (is_compound & mask) == match) 3246 break; 3247 } 3248 if (&ref->node == &hdl->ctrl_refs) 3249 ref = NULL; 3250 } 3251 } 3252 mutex_unlock(hdl->lock); 3253 3254 if (!ref) 3255 return -EINVAL; 3256 3257 ctrl = ref->ctrl; 3258 memset(qc, 0, sizeof(*qc)); 3259 if (id >= V4L2_CID_PRIVATE_BASE) 3260 qc->id = id; 3261 else 3262 qc->id = ctrl->id; 3263 strscpy(qc->name, ctrl->name, sizeof(qc->name)); 3264 qc->flags = user_flags(ctrl); 3265 qc->type = ctrl->type; 3266 qc->elem_size = ctrl->elem_size; 3267 qc->elems = ctrl->elems; 3268 qc->nr_of_dims = ctrl->nr_of_dims; 3269 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0])); 3270 qc->minimum = ctrl->minimum; 3271 qc->maximum = ctrl->maximum; 3272 qc->default_value = ctrl->default_value; 3273 if (ctrl->type == V4L2_CTRL_TYPE_MENU 3274 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU) 3275 qc->step = 1; 3276 else 3277 qc->step = ctrl->step; 3278 return 0; 3279} 3280EXPORT_SYMBOL(v4l2_query_ext_ctrl); 3281 3282/* Implement VIDIOC_QUERYCTRL */ 3283int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc) 3284{ 3285 struct v4l2_query_ext_ctrl qec = { qc->id }; 3286 int rc; 3287 3288 rc = v4l2_query_ext_ctrl(hdl, &qec); 3289 if (rc) 3290 return rc; 3291 3292 qc->id = qec.id; 3293 qc->type = qec.type; 3294 qc->flags = qec.flags; 3295 strscpy(qc->name, qec.name, sizeof(qc->name)); 3296 switch (qc->type) { 3297 case V4L2_CTRL_TYPE_INTEGER: 3298 case V4L2_CTRL_TYPE_BOOLEAN: 3299 case V4L2_CTRL_TYPE_MENU: 3300 case V4L2_CTRL_TYPE_INTEGER_MENU: 3301 case V4L2_CTRL_TYPE_STRING: 3302 case V4L2_CTRL_TYPE_BITMASK: 3303 qc->minimum = qec.minimum; 3304 qc->maximum = qec.maximum; 3305 qc->step = qec.step; 3306 qc->default_value = qec.default_value; 3307 break; 3308 default: 3309 qc->minimum = 0; 3310 qc->maximum = 0; 3311 qc->step = 0; 3312 qc->default_value = 0; 3313 break; 3314 } 3315 return 0; 3316} 3317EXPORT_SYMBOL(v4l2_queryctrl); 3318 3319/* Implement VIDIOC_QUERYMENU */ 3320int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm) 3321{ 3322 struct v4l2_ctrl *ctrl; 3323 u32 i = qm->index; 3324 3325 ctrl = v4l2_ctrl_find(hdl, qm->id); 3326 if (!ctrl) 3327 return -EINVAL; 3328 3329 qm->reserved = 0; 3330 /* Sanity checks */ 3331 switch (ctrl->type) { 3332 case V4L2_CTRL_TYPE_MENU: 3333 if (ctrl->qmenu == NULL) 3334 return -EINVAL; 3335 break; 3336 case V4L2_CTRL_TYPE_INTEGER_MENU: 3337 if (ctrl->qmenu_int == NULL) 3338 return -EINVAL; 3339 break; 3340 default: 3341 return -EINVAL; 3342 } 3343 3344 if (i < ctrl->minimum || i > ctrl->maximum) 3345 return -EINVAL; 3346 3347 /* Use mask to see if this menu item should be skipped */ 3348 if (ctrl->menu_skip_mask & (1ULL << i)) 3349 return -EINVAL; 3350 /* Empty menu items should also be skipped */ 3351 if (ctrl->type == V4L2_CTRL_TYPE_MENU) { 3352 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0') 3353 return -EINVAL; 3354 strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name)); 3355 } else { 3356 qm->value = ctrl->qmenu_int[i]; 3357 } 3358 return 0; 3359} 3360EXPORT_SYMBOL(v4l2_querymenu); 3361 3362static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl, 3363 const struct v4l2_ctrl_handler *from) 3364{ 3365 struct v4l2_ctrl_ref *ref; 3366 int err = 0; 3367 3368 if (WARN_ON(!hdl || hdl == from)) 3369 return -EINVAL; 3370 3371 if (hdl->error) 3372 return hdl->error; 3373 3374 WARN_ON(hdl->lock != &hdl->_lock); 3375 3376 mutex_lock(from->lock); 3377 list_for_each_entry(ref, &from->ctrl_refs, node) { 3378 struct v4l2_ctrl *ctrl = ref->ctrl; 3379 struct v4l2_ctrl_ref *new_ref; 3380 3381 /* Skip refs inherited from other devices */ 3382 if (ref->from_other_dev) 3383 continue; 3384 /* And buttons */ 3385 if (ctrl->type == V4L2_CTRL_TYPE_BUTTON) 3386 continue; 3387 err = handler_new_ref(hdl, ctrl, &new_ref, false, true); 3388 if (err) 3389 break; 3390 } 3391 mutex_unlock(from->lock); 3392 return err; 3393} 3394 3395static void v4l2_ctrl_request_queue(struct media_request_object *obj) 3396{ 3397 struct v4l2_ctrl_handler *hdl = 3398 container_of(obj, struct v4l2_ctrl_handler, req_obj); 3399 struct v4l2_ctrl_handler *main_hdl = obj->priv; 3400 3401 mutex_lock(main_hdl->lock); 3402 list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued); 3403 hdl->request_is_queued = true; 3404 mutex_unlock(main_hdl->lock); 3405} 3406 3407static void v4l2_ctrl_request_unbind(struct media_request_object *obj) 3408{ 3409 struct v4l2_ctrl_handler *hdl = 3410 container_of(obj, struct v4l2_ctrl_handler, req_obj); 3411 struct v4l2_ctrl_handler *main_hdl = obj->priv; 3412 3413 mutex_lock(main_hdl->lock); 3414 list_del_init(&hdl->requests); 3415 if (hdl->request_is_queued) { 3416 list_del_init(&hdl->requests_queued); 3417 hdl->request_is_queued = false; 3418 } 3419 mutex_unlock(main_hdl->lock); 3420} 3421 3422static void v4l2_ctrl_request_release(struct media_request_object *obj) 3423{ 3424 struct v4l2_ctrl_handler *hdl = 3425 container_of(obj, struct v4l2_ctrl_handler, req_obj); 3426 3427 v4l2_ctrl_handler_free(hdl); 3428 kfree(hdl); 3429} 3430 3431static const struct media_request_object_ops req_ops = { 3432 .queue = v4l2_ctrl_request_queue, 3433 .unbind = v4l2_ctrl_request_unbind, 3434 .release = v4l2_ctrl_request_release, 3435}; 3436 3437struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req, 3438 struct v4l2_ctrl_handler *parent) 3439{ 3440 struct media_request_object *obj; 3441 3442 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING && 3443 req->state != MEDIA_REQUEST_STATE_QUEUED)) 3444 return NULL; 3445 3446 obj = media_request_object_find(req, &req_ops, parent); 3447 if (obj) 3448 return container_of(obj, struct v4l2_ctrl_handler, req_obj); 3449 return NULL; 3450} 3451EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find); 3452 3453struct v4l2_ctrl * 3454v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) 3455{ 3456 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); 3457 3458 return (ref && ref->valid_p_req) ? ref->ctrl : NULL; 3459} 3460EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find); 3461 3462static int v4l2_ctrl_request_bind(struct media_request *req, 3463 struct v4l2_ctrl_handler *hdl, 3464 struct v4l2_ctrl_handler *from) 3465{ 3466 int ret; 3467 3468 ret = v4l2_ctrl_request_clone(hdl, from); 3469 3470 if (!ret) { 3471 ret = media_request_object_bind(req, &req_ops, 3472 from, false, &hdl->req_obj); 3473 if (!ret) { 3474 mutex_lock(from->lock); 3475 list_add_tail(&hdl->requests, &from->requests); 3476 mutex_unlock(from->lock); 3477 } 3478 } 3479 return ret; 3480} 3481 3482/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS: 3483 3484 It is not a fully atomic operation, just best-effort only. After all, if 3485 multiple controls have to be set through multiple i2c writes (for example) 3486 then some initial writes may succeed while others fail. Thus leaving the 3487 system in an inconsistent state. The question is how much effort you are 3488 willing to spend on trying to make something atomic that really isn't. 3489 3490 From the point of view of an application the main requirement is that 3491 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an 3492 error should be returned without actually affecting any controls. 3493 3494 If all the values are correct, then it is acceptable to just give up 3495 in case of low-level errors. 3496 3497 It is important though that the application can tell when only a partial 3498 configuration was done. The way we do that is through the error_idx field 3499 of struct v4l2_ext_controls: if that is equal to the count field then no 3500 controls were affected. Otherwise all controls before that index were 3501 successful in performing their 'get' or 'set' operation, the control at 3502 the given index failed, and you don't know what happened with the controls 3503 after the failed one. Since if they were part of a control cluster they 3504 could have been successfully processed (if a cluster member was encountered 3505 at index < error_idx), they could have failed (if a cluster member was at 3506 error_idx), or they may not have been processed yet (if the first cluster 3507 member appeared after error_idx). 3508 3509 It is all fairly theoretical, though. In practice all you can do is to 3510 bail out. If error_idx == count, then it is an application bug. If 3511 error_idx < count then it is only an application bug if the error code was 3512 EBUSY. That usually means that something started streaming just when you 3513 tried to set the controls. In all other cases it is a driver/hardware 3514 problem and all you can do is to retry or bail out. 3515 3516 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that 3517 never modifies controls the error_idx is just set to whatever control 3518 has an invalid value. 3519 */ 3520 3521/* Prepare for the extended g/s/try functions. 3522 Find the controls in the control array and do some basic checks. */ 3523static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl, 3524 struct v4l2_ext_controls *cs, 3525 struct v4l2_ctrl_helper *helpers, 3526 struct video_device *vdev, 3527 bool get) 3528{ 3529 struct v4l2_ctrl_helper *h; 3530 bool have_clusters = false; 3531 u32 i; 3532 3533 for (i = 0, h = helpers; i < cs->count; i++, h++) { 3534 struct v4l2_ext_control *c = &cs->controls[i]; 3535 struct v4l2_ctrl_ref *ref; 3536 struct v4l2_ctrl *ctrl; 3537 u32 id = c->id & V4L2_CTRL_ID_MASK; 3538 3539 cs->error_idx = i; 3540 3541 if (cs->which && 3542 cs->which != V4L2_CTRL_WHICH_DEF_VAL && 3543 cs->which != V4L2_CTRL_WHICH_REQUEST_VAL && 3544 V4L2_CTRL_ID2WHICH(id) != cs->which) { 3545 dprintk(vdev, 3546 "invalid which 0x%x or control id 0x%x\n", 3547 cs->which, id); 3548 return -EINVAL; 3549 } 3550 3551 /* Old-style private controls are not allowed for 3552 extended controls */ 3553 if (id >= V4L2_CID_PRIVATE_BASE) { 3554 dprintk(vdev, 3555 "old-style private controls not allowed\n"); 3556 return -EINVAL; 3557 } 3558 ref = find_ref_lock(hdl, id); 3559 if (ref == NULL) { 3560 dprintk(vdev, "cannot find control id 0x%x\n", id); 3561 return -EINVAL; 3562 } 3563 h->ref = ref; 3564 ctrl = ref->ctrl; 3565 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) { 3566 dprintk(vdev, "control id 0x%x is disabled\n", id); 3567 return -EINVAL; 3568 } 3569 3570 if (ctrl->cluster[0]->ncontrols > 1) 3571 have_clusters = true; 3572 if (ctrl->cluster[0] != ctrl) 3573 ref = find_ref_lock(hdl, ctrl->cluster[0]->id); 3574 if (ctrl->is_ptr && !ctrl->is_string) { 3575 unsigned tot_size = ctrl->elems * ctrl->elem_size; 3576 3577 if (c->size < tot_size) { 3578 /* 3579 * In the get case the application first 3580 * queries to obtain the size of the control. 3581 */ 3582 if (get) { 3583 c->size = tot_size; 3584 return -ENOSPC; 3585 } 3586 dprintk(vdev, 3587 "pointer control id 0x%x size too small, %d bytes but %d bytes needed\n", 3588 id, c->size, tot_size); 3589 return -EFAULT; 3590 } 3591 c->size = tot_size; 3592 } 3593 /* Store the ref to the master control of the cluster */ 3594 h->mref = ref; 3595 /* Initially set next to 0, meaning that there is no other 3596 control in this helper array belonging to the same 3597 cluster */ 3598 h->next = 0; 3599 } 3600 3601 /* We are done if there were no controls that belong to a multi- 3602 control cluster. */ 3603 if (!have_clusters) 3604 return 0; 3605 3606 /* The code below figures out in O(n) time which controls in the list 3607 belong to the same cluster. */ 3608 3609 /* This has to be done with the handler lock taken. */ 3610 mutex_lock(hdl->lock); 3611 3612 /* First zero the helper field in the master control references */ 3613 for (i = 0; i < cs->count; i++) 3614 helpers[i].mref->helper = NULL; 3615 for (i = 0, h = helpers; i < cs->count; i++, h++) { 3616 struct v4l2_ctrl_ref *mref = h->mref; 3617 3618 /* If the mref->helper is set, then it points to an earlier 3619 helper that belongs to the same cluster. */ 3620 if (mref->helper) { 3621 /* Set the next field of mref->helper to the current 3622 index: this means that that earlier helper now 3623 points to the next helper in the same cluster. */ 3624 mref->helper->next = i; 3625 /* mref should be set only for the first helper in the 3626 cluster, clear the others. */ 3627 h->mref = NULL; 3628 } 3629 /* Point the mref helper to the current helper struct. */ 3630 mref->helper = h; 3631 } 3632 mutex_unlock(hdl->lock); 3633 return 0; 3634} 3635 3636/* Handles the corner case where cs->count == 0. It checks whether the 3637 specified control class exists. If that class ID is 0, then it checks 3638 whether there are any controls at all. */ 3639static int class_check(struct v4l2_ctrl_handler *hdl, u32 which) 3640{ 3641 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL || 3642 which == V4L2_CTRL_WHICH_REQUEST_VAL) 3643 return 0; 3644 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL; 3645} 3646 3647/* 3648 * Get extended controls. Allocates the helpers array if needed. 3649 * 3650 * Note that v4l2_g_ext_ctrls_common() with 'which' set to 3651 * V4L2_CTRL_WHICH_REQUEST_VAL is only called if the request was 3652 * completed, and in that case valid_p_req is true for all controls. 3653 */ 3654static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl, 3655 struct v4l2_ext_controls *cs, 3656 struct video_device *vdev) 3657{ 3658 struct v4l2_ctrl_helper helper[4]; 3659 struct v4l2_ctrl_helper *helpers = helper; 3660 int ret; 3661 int i, j; 3662 bool is_default, is_request; 3663 3664 is_default = (cs->which == V4L2_CTRL_WHICH_DEF_VAL); 3665 is_request = (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL); 3666 3667 cs->error_idx = cs->count; 3668 cs->which = V4L2_CTRL_ID2WHICH(cs->which); 3669 3670 if (hdl == NULL) 3671 return -EINVAL; 3672 3673 if (cs->count == 0) 3674 return class_check(hdl, cs->which); 3675 3676 if (cs->count > ARRAY_SIZE(helper)) { 3677 helpers = kvmalloc_array(cs->count, sizeof(helper[0]), 3678 GFP_KERNEL); 3679 if (helpers == NULL) 3680 return -ENOMEM; 3681 } 3682 3683 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, true); 3684 cs->error_idx = cs->count; 3685 3686 for (i = 0; !ret && i < cs->count; i++) 3687 if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) 3688 ret = -EACCES; 3689 3690 for (i = 0; !ret && i < cs->count; i++) { 3691 struct v4l2_ctrl *master; 3692 bool is_volatile = false; 3693 u32 idx = i; 3694 3695 if (helpers[i].mref == NULL) 3696 continue; 3697 3698 master = helpers[i].mref->ctrl; 3699 cs->error_idx = i; 3700 3701 v4l2_ctrl_lock(master); 3702 3703 /* 3704 * g_volatile_ctrl will update the new control values. 3705 * This makes no sense for V4L2_CTRL_WHICH_DEF_VAL and 3706 * V4L2_CTRL_WHICH_REQUEST_VAL. In the case of requests 3707 * it is v4l2_ctrl_request_complete() that copies the 3708 * volatile controls at the time of request completion 3709 * to the request, so you don't want to do that again. 3710 */ 3711 if (!is_default && !is_request && 3712 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) || 3713 (master->has_volatiles && !is_cur_manual(master)))) { 3714 for (j = 0; j < master->ncontrols; j++) 3715 cur_to_new(master->cluster[j]); 3716 ret = call_op(master, g_volatile_ctrl); 3717 is_volatile = true; 3718 } 3719 3720 if (ret) { 3721 v4l2_ctrl_unlock(master); 3722 break; 3723 } 3724 3725 /* 3726 * Copy the default value (if is_default is true), the 3727 * request value (if is_request is true and p_req is valid), 3728 * the new volatile value (if is_volatile is true) or the 3729 * current value. 3730 */ 3731 do { 3732 struct v4l2_ctrl_ref *ref = helpers[idx].ref; 3733 3734 if (is_default) 3735 ret = def_to_user(cs->controls + idx, ref->ctrl); 3736 else if (is_request && ref->valid_p_req) 3737 ret = req_to_user(cs->controls + idx, ref); 3738 else if (is_volatile) 3739 ret = new_to_user(cs->controls + idx, ref->ctrl); 3740 else 3741 ret = cur_to_user(cs->controls + idx, ref->ctrl); 3742 idx = helpers[idx].next; 3743 } while (!ret && idx); 3744 3745 v4l2_ctrl_unlock(master); 3746 } 3747 3748 if (cs->count > ARRAY_SIZE(helper)) 3749 kvfree(helpers); 3750 return ret; 3751} 3752 3753static struct media_request_object * 3754v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl, 3755 struct media_request *req, bool set) 3756{ 3757 struct media_request_object *obj; 3758 struct v4l2_ctrl_handler *new_hdl; 3759 int ret; 3760 3761 if (IS_ERR(req)) 3762 return ERR_CAST(req); 3763 3764 if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING)) 3765 return ERR_PTR(-EBUSY); 3766 3767 obj = media_request_object_find(req, &req_ops, hdl); 3768 if (obj) 3769 return obj; 3770 if (!set) 3771 return ERR_PTR(-ENOENT); 3772 3773 new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL); 3774 if (!new_hdl) 3775 return ERR_PTR(-ENOMEM); 3776 3777 obj = &new_hdl->req_obj; 3778 ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8); 3779 if (!ret) 3780 ret = v4l2_ctrl_request_bind(req, new_hdl, hdl); 3781 if (ret) { 3782 kfree(new_hdl); 3783 3784 return ERR_PTR(ret); 3785 } 3786 3787 media_request_object_get(obj); 3788 return obj; 3789} 3790 3791int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev, 3792 struct media_device *mdev, struct v4l2_ext_controls *cs) 3793{ 3794 struct media_request_object *obj = NULL; 3795 struct media_request *req = NULL; 3796 int ret; 3797 3798 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) { 3799 if (!mdev || cs->request_fd < 0) 3800 return -EINVAL; 3801 3802 req = media_request_get_by_fd(mdev, cs->request_fd); 3803 if (IS_ERR(req)) 3804 return PTR_ERR(req); 3805 3806 if (req->state != MEDIA_REQUEST_STATE_COMPLETE) { 3807 media_request_put(req); 3808 return -EACCES; 3809 } 3810 3811 ret = media_request_lock_for_access(req); 3812 if (ret) { 3813 media_request_put(req); 3814 return ret; 3815 } 3816 3817 obj = v4l2_ctrls_find_req_obj(hdl, req, false); 3818 if (IS_ERR(obj)) { 3819 media_request_unlock_for_access(req); 3820 media_request_put(req); 3821 return PTR_ERR(obj); 3822 } 3823 3824 hdl = container_of(obj, struct v4l2_ctrl_handler, 3825 req_obj); 3826 } 3827 3828 ret = v4l2_g_ext_ctrls_common(hdl, cs, vdev); 3829 3830 if (obj) { 3831 media_request_unlock_for_access(req); 3832 media_request_object_put(obj); 3833 media_request_put(req); 3834 } 3835 return ret; 3836} 3837EXPORT_SYMBOL(v4l2_g_ext_ctrls); 3838 3839/* Helper function to get a single control */ 3840static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c) 3841{ 3842 struct v4l2_ctrl *master = ctrl->cluster[0]; 3843 int ret = 0; 3844 int i; 3845 3846 /* Compound controls are not supported. The new_to_user() and 3847 * cur_to_user() calls below would need to be modified not to access 3848 * userspace memory when called from get_ctrl(). 3849 */ 3850 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64) 3851 return -EINVAL; 3852 3853 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) 3854 return -EACCES; 3855 3856 v4l2_ctrl_lock(master); 3857 /* g_volatile_ctrl will update the current control values */ 3858 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { 3859 for (i = 0; i < master->ncontrols; i++) 3860 cur_to_new(master->cluster[i]); 3861 ret = call_op(master, g_volatile_ctrl); 3862 new_to_user(c, ctrl); 3863 } else { 3864 cur_to_user(c, ctrl); 3865 } 3866 v4l2_ctrl_unlock(master); 3867 return ret; 3868} 3869 3870int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control) 3871{ 3872 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); 3873 struct v4l2_ext_control c; 3874 int ret; 3875 3876 if (ctrl == NULL || !ctrl->is_int) 3877 return -EINVAL; 3878 ret = get_ctrl(ctrl, &c); 3879 control->value = c.value; 3880 return ret; 3881} 3882EXPORT_SYMBOL(v4l2_g_ctrl); 3883 3884s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl) 3885{ 3886 struct v4l2_ext_control c; 3887 3888 /* It's a driver bug if this happens. */ 3889 if (WARN_ON(!ctrl->is_int)) 3890 return 0; 3891 c.value = 0; 3892 get_ctrl(ctrl, &c); 3893 return c.value; 3894} 3895EXPORT_SYMBOL(v4l2_ctrl_g_ctrl); 3896 3897s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl) 3898{ 3899 struct v4l2_ext_control c; 3900 3901 /* It's a driver bug if this happens. */ 3902 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64)) 3903 return 0; 3904 c.value64 = 0; 3905 get_ctrl(ctrl, &c); 3906 return c.value64; 3907} 3908EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64); 3909 3910 3911/* Core function that calls try/s_ctrl and ensures that the new value is 3912 copied to the current value on a set. 3913 Must be called with ctrl->handler->lock held. */ 3914static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master, 3915 bool set, u32 ch_flags) 3916{ 3917 bool update_flag; 3918 int ret; 3919 int i; 3920 3921 /* Go through the cluster and either validate the new value or 3922 (if no new value was set), copy the current value to the new 3923 value, ensuring a consistent view for the control ops when 3924 called. */ 3925 for (i = 0; i < master->ncontrols; i++) { 3926 struct v4l2_ctrl *ctrl = master->cluster[i]; 3927 3928 if (ctrl == NULL) 3929 continue; 3930 3931 if (!ctrl->is_new) { 3932 cur_to_new(ctrl); 3933 continue; 3934 } 3935 /* Check again: it may have changed since the 3936 previous check in try_or_set_ext_ctrls(). */ 3937 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) 3938 return -EBUSY; 3939 } 3940 3941 ret = call_op(master, try_ctrl); 3942 3943 /* Don't set if there is no change */ 3944 if (ret || !set || !cluster_changed(master)) 3945 return ret; 3946 ret = call_op(master, s_ctrl); 3947 if (ret) 3948 return ret; 3949 3950 /* If OK, then make the new values permanent. */ 3951 update_flag = is_cur_manual(master) != is_new_manual(master); 3952 3953 for (i = 0; i < master->ncontrols; i++) { 3954 /* 3955 * If we switch from auto to manual mode, and this cluster 3956 * contains volatile controls, then all non-master controls 3957 * have to be marked as changed. The 'new' value contains 3958 * the volatile value (obtained by update_from_auto_cluster), 3959 * which now has to become the current value. 3960 */ 3961 if (i && update_flag && is_new_manual(master) && 3962 master->has_volatiles && master->cluster[i]) 3963 master->cluster[i]->has_changed = true; 3964 3965 new_to_cur(fh, master->cluster[i], ch_flags | 3966 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); 3967 } 3968 return 0; 3969} 3970 3971/* Validate controls. */ 3972static int validate_ctrls(struct v4l2_ext_controls *cs, 3973 struct v4l2_ctrl_helper *helpers, 3974 struct video_device *vdev, 3975 bool set) 3976{ 3977 unsigned i; 3978 int ret = 0; 3979 3980 cs->error_idx = cs->count; 3981 for (i = 0; i < cs->count; i++) { 3982 struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl; 3983 union v4l2_ctrl_ptr p_new; 3984 3985 cs->error_idx = i; 3986 3987 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) { 3988 dprintk(vdev, 3989 "control id 0x%x is read-only\n", 3990 ctrl->id); 3991 return -EACCES; 3992 } 3993 /* This test is also done in try_set_control_cluster() which 3994 is called in atomic context, so that has the final say, 3995 but it makes sense to do an up-front check as well. Once 3996 an error occurs in try_set_control_cluster() some other 3997 controls may have been set already and we want to do a 3998 best-effort to avoid that. */ 3999 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) { 4000 dprintk(vdev, 4001 "control id 0x%x is grabbed, cannot set\n", 4002 ctrl->id); 4003 return -EBUSY; 4004 } 4005 /* 4006 * Skip validation for now if the payload needs to be copied 4007 * from userspace into kernelspace. We'll validate those later. 4008 */ 4009 if (ctrl->is_ptr) 4010 continue; 4011 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64) 4012 p_new.p_s64 = &cs->controls[i].value64; 4013 else 4014 p_new.p_s32 = &cs->controls[i].value; 4015 ret = validate_new(ctrl, p_new); 4016 if (ret) 4017 return ret; 4018 } 4019 return 0; 4020} 4021 4022/* Obtain the current volatile values of an autocluster and mark them 4023 as new. */ 4024static void update_from_auto_cluster(struct v4l2_ctrl *master) 4025{ 4026 int i; 4027 4028 for (i = 1; i < master->ncontrols; i++) 4029 cur_to_new(master->cluster[i]); 4030 if (!call_op(master, g_volatile_ctrl)) 4031 for (i = 1; i < master->ncontrols; i++) 4032 if (master->cluster[i]) 4033 master->cluster[i]->is_new = 1; 4034} 4035 4036/* Try or try-and-set controls */ 4037static int try_set_ext_ctrls_common(struct v4l2_fh *fh, 4038 struct v4l2_ctrl_handler *hdl, 4039 struct v4l2_ext_controls *cs, 4040 struct video_device *vdev, bool set) 4041{ 4042 struct v4l2_ctrl_helper helper[4]; 4043 struct v4l2_ctrl_helper *helpers = helper; 4044 unsigned i, j; 4045 int ret; 4046 4047 cs->error_idx = cs->count; 4048 4049 /* Default value cannot be changed */ 4050 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL) { 4051 dprintk(vdev, "%s: cannot change default value\n", 4052 video_device_node_name(vdev)); 4053 return -EINVAL; 4054 } 4055 4056 cs->which = V4L2_CTRL_ID2WHICH(cs->which); 4057 4058 if (hdl == NULL) { 4059 dprintk(vdev, "%s: invalid null control handler\n", 4060 video_device_node_name(vdev)); 4061 return -EINVAL; 4062 } 4063 4064 if (cs->count == 0) 4065 return class_check(hdl, cs->which); 4066 4067 if (cs->count > ARRAY_SIZE(helper)) { 4068 helpers = kvmalloc_array(cs->count, sizeof(helper[0]), 4069 GFP_KERNEL); 4070 if (!helpers) 4071 return -ENOMEM; 4072 } 4073 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, false); 4074 if (!ret) 4075 ret = validate_ctrls(cs, helpers, vdev, set); 4076 if (ret && set) 4077 cs->error_idx = cs->count; 4078 for (i = 0; !ret && i < cs->count; i++) { 4079 struct v4l2_ctrl *master; 4080 u32 idx = i; 4081 4082 if (helpers[i].mref == NULL) 4083 continue; 4084 4085 cs->error_idx = i; 4086 master = helpers[i].mref->ctrl; 4087 v4l2_ctrl_lock(master); 4088 4089 /* Reset the 'is_new' flags of the cluster */ 4090 for (j = 0; j < master->ncontrols; j++) 4091 if (master->cluster[j]) 4092 master->cluster[j]->is_new = 0; 4093 4094 /* For volatile autoclusters that are currently in auto mode 4095 we need to discover if it will be set to manual mode. 4096 If so, then we have to copy the current volatile values 4097 first since those will become the new manual values (which 4098 may be overwritten by explicit new values from this set 4099 of controls). */ 4100 if (master->is_auto && master->has_volatiles && 4101 !is_cur_manual(master)) { 4102 /* Pick an initial non-manual value */ 4103 s32 new_auto_val = master->manual_mode_value + 1; 4104 u32 tmp_idx = idx; 4105 4106 do { 4107 /* Check if the auto control is part of the 4108 list, and remember the new value. */ 4109 if (helpers[tmp_idx].ref->ctrl == master) 4110 new_auto_val = cs->controls[tmp_idx].value; 4111 tmp_idx = helpers[tmp_idx].next; 4112 } while (tmp_idx); 4113 /* If the new value == the manual value, then copy 4114 the current volatile values. */ 4115 if (new_auto_val == master->manual_mode_value) 4116 update_from_auto_cluster(master); 4117 } 4118 4119 /* Copy the new caller-supplied control values. 4120 user_to_new() sets 'is_new' to 1. */ 4121 do { 4122 struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl; 4123 4124 ret = user_to_new(cs->controls + idx, ctrl); 4125 if (!ret && ctrl->is_ptr) 4126 ret = validate_new(ctrl, ctrl->p_new); 4127 idx = helpers[idx].next; 4128 } while (!ret && idx); 4129 4130 if (!ret) 4131 ret = try_or_set_cluster(fh, master, 4132 !hdl->req_obj.req && set, 0); 4133 if (!ret && hdl->req_obj.req && set) { 4134 for (j = 0; j < master->ncontrols; j++) { 4135 struct v4l2_ctrl_ref *ref = 4136 find_ref(hdl, master->cluster[j]->id); 4137 4138 new_to_req(ref); 4139 } 4140 } 4141 4142 /* Copy the new values back to userspace. */ 4143 if (!ret) { 4144 idx = i; 4145 do { 4146 ret = new_to_user(cs->controls + idx, 4147 helpers[idx].ref->ctrl); 4148 idx = helpers[idx].next; 4149 } while (!ret && idx); 4150 } 4151 v4l2_ctrl_unlock(master); 4152 } 4153 4154 if (cs->count > ARRAY_SIZE(helper)) 4155 kvfree(helpers); 4156 return ret; 4157} 4158 4159static int try_set_ext_ctrls(struct v4l2_fh *fh, 4160 struct v4l2_ctrl_handler *hdl, 4161 struct video_device *vdev, 4162 struct media_device *mdev, 4163 struct v4l2_ext_controls *cs, bool set) 4164{ 4165 struct media_request_object *obj = NULL; 4166 struct media_request *req = NULL; 4167 int ret; 4168 4169 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) { 4170 if (!mdev) { 4171 dprintk(vdev, "%s: missing media device\n", 4172 video_device_node_name(vdev)); 4173 return -EINVAL; 4174 } 4175 4176 if (cs->request_fd < 0) { 4177 dprintk(vdev, "%s: invalid request fd %d\n", 4178 video_device_node_name(vdev), cs->request_fd); 4179 return -EINVAL; 4180 } 4181 4182 req = media_request_get_by_fd(mdev, cs->request_fd); 4183 if (IS_ERR(req)) { 4184 dprintk(vdev, "%s: cannot find request fd %d\n", 4185 video_device_node_name(vdev), cs->request_fd); 4186 return PTR_ERR(req); 4187 } 4188 4189 ret = media_request_lock_for_update(req); 4190 if (ret) { 4191 dprintk(vdev, "%s: cannot lock request fd %d\n", 4192 video_device_node_name(vdev), cs->request_fd); 4193 media_request_put(req); 4194 return ret; 4195 } 4196 4197 obj = v4l2_ctrls_find_req_obj(hdl, req, set); 4198 if (IS_ERR(obj)) { 4199 dprintk(vdev, 4200 "%s: cannot find request object for request fd %d\n", 4201 video_device_node_name(vdev), 4202 cs->request_fd); 4203 media_request_unlock_for_update(req); 4204 media_request_put(req); 4205 return PTR_ERR(obj); 4206 } 4207 hdl = container_of(obj, struct v4l2_ctrl_handler, 4208 req_obj); 4209 } 4210 4211 ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set); 4212 if (ret) 4213 dprintk(vdev, 4214 "%s: try_set_ext_ctrls_common failed (%d)\n", 4215 video_device_node_name(vdev), ret); 4216 4217 if (obj) { 4218 media_request_unlock_for_update(req); 4219 media_request_object_put(obj); 4220 media_request_put(req); 4221 } 4222 4223 return ret; 4224} 4225 4226int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, 4227 struct video_device *vdev, 4228 struct media_device *mdev, 4229 struct v4l2_ext_controls *cs) 4230{ 4231 return try_set_ext_ctrls(NULL, hdl, vdev, mdev, cs, false); 4232} 4233EXPORT_SYMBOL(v4l2_try_ext_ctrls); 4234 4235int v4l2_s_ext_ctrls(struct v4l2_fh *fh, 4236 struct v4l2_ctrl_handler *hdl, 4237 struct video_device *vdev, 4238 struct media_device *mdev, 4239 struct v4l2_ext_controls *cs) 4240{ 4241 return try_set_ext_ctrls(fh, hdl, vdev, mdev, cs, true); 4242} 4243EXPORT_SYMBOL(v4l2_s_ext_ctrls); 4244 4245/* Helper function for VIDIOC_S_CTRL compatibility */ 4246static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags) 4247{ 4248 struct v4l2_ctrl *master = ctrl->cluster[0]; 4249 int ret; 4250 int i; 4251 4252 /* Reset the 'is_new' flags of the cluster */ 4253 for (i = 0; i < master->ncontrols; i++) 4254 if (master->cluster[i]) 4255 master->cluster[i]->is_new = 0; 4256 4257 ret = validate_new(ctrl, ctrl->p_new); 4258 if (ret) 4259 return ret; 4260 4261 /* For autoclusters with volatiles that are switched from auto to 4262 manual mode we have to update the current volatile values since 4263 those will become the initial manual values after such a switch. */ 4264 if (master->is_auto && master->has_volatiles && ctrl == master && 4265 !is_cur_manual(master) && ctrl->val == master->manual_mode_value) 4266 update_from_auto_cluster(master); 4267 4268 ctrl->is_new = 1; 4269 return try_or_set_cluster(fh, master, true, ch_flags); 4270} 4271 4272/* Helper function for VIDIOC_S_CTRL compatibility */ 4273static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, 4274 struct v4l2_ext_control *c) 4275{ 4276 int ret; 4277 4278 v4l2_ctrl_lock(ctrl); 4279 user_to_new(c, ctrl); 4280 ret = set_ctrl(fh, ctrl, 0); 4281 if (!ret) 4282 cur_to_user(c, ctrl); 4283 v4l2_ctrl_unlock(ctrl); 4284 return ret; 4285} 4286 4287int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, 4288 struct v4l2_control *control) 4289{ 4290 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); 4291 struct v4l2_ext_control c = { control->id }; 4292 int ret; 4293 4294 if (ctrl == NULL || !ctrl->is_int) 4295 return -EINVAL; 4296 4297 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) 4298 return -EACCES; 4299 4300 c.value = control->value; 4301 ret = set_ctrl_lock(fh, ctrl, &c); 4302 control->value = c.value; 4303 return ret; 4304} 4305EXPORT_SYMBOL(v4l2_s_ctrl); 4306 4307int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val) 4308{ 4309 lockdep_assert_held(ctrl->handler->lock); 4310 4311 /* It's a driver bug if this happens. */ 4312 if (WARN_ON(!ctrl->is_int)) 4313 return -EINVAL; 4314 ctrl->val = val; 4315 return set_ctrl(NULL, ctrl, 0); 4316} 4317EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl); 4318 4319int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val) 4320{ 4321 lockdep_assert_held(ctrl->handler->lock); 4322 4323 /* It's a driver bug if this happens. */ 4324 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64)) 4325 return -EINVAL; 4326 *ctrl->p_new.p_s64 = val; 4327 return set_ctrl(NULL, ctrl, 0); 4328} 4329EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64); 4330 4331int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s) 4332{ 4333 lockdep_assert_held(ctrl->handler->lock); 4334 4335 /* It's a driver bug if this happens. */ 4336 if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING)) 4337 return -EINVAL; 4338 strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1); 4339 return set_ctrl(NULL, ctrl, 0); 4340} 4341EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string); 4342 4343int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl, 4344 enum v4l2_ctrl_type type, const void *p) 4345{ 4346 lockdep_assert_held(ctrl->handler->lock); 4347 4348 /* It's a driver bug if this happens. */ 4349 if (WARN_ON(ctrl->type != type)) 4350 return -EINVAL; 4351 memcpy(ctrl->p_new.p, p, ctrl->elems * ctrl->elem_size); 4352 return set_ctrl(NULL, ctrl, 0); 4353} 4354EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_compound); 4355 4356void v4l2_ctrl_request_complete(struct media_request *req, 4357 struct v4l2_ctrl_handler *main_hdl) 4358{ 4359 struct media_request_object *obj; 4360 struct v4l2_ctrl_handler *hdl; 4361 struct v4l2_ctrl_ref *ref; 4362 4363 if (!req || !main_hdl) 4364 return; 4365 4366 /* 4367 * Note that it is valid if nothing was found. It means 4368 * that this request doesn't have any controls and so just 4369 * wants to leave the controls unchanged. 4370 */ 4371 obj = media_request_object_find(req, &req_ops, main_hdl); 4372 if (!obj) 4373 return; 4374 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj); 4375 4376 list_for_each_entry(ref, &hdl->ctrl_refs, node) { 4377 struct v4l2_ctrl *ctrl = ref->ctrl; 4378 struct v4l2_ctrl *master = ctrl->cluster[0]; 4379 unsigned int i; 4380 4381 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { 4382 v4l2_ctrl_lock(master); 4383 /* g_volatile_ctrl will update the current control values */ 4384 for (i = 0; i < master->ncontrols; i++) 4385 cur_to_new(master->cluster[i]); 4386 call_op(master, g_volatile_ctrl); 4387 new_to_req(ref); 4388 v4l2_ctrl_unlock(master); 4389 continue; 4390 } 4391 if (ref->valid_p_req) 4392 continue; 4393 4394 /* Copy the current control value into the request */ 4395 v4l2_ctrl_lock(ctrl); 4396 cur_to_req(ref); 4397 v4l2_ctrl_unlock(ctrl); 4398 } 4399 4400 mutex_lock(main_hdl->lock); 4401 WARN_ON(!hdl->request_is_queued); 4402 list_del_init(&hdl->requests_queued); 4403 hdl->request_is_queued = false; 4404 mutex_unlock(main_hdl->lock); 4405 media_request_object_complete(obj); 4406 media_request_object_put(obj); 4407} 4408EXPORT_SYMBOL(v4l2_ctrl_request_complete); 4409 4410int v4l2_ctrl_request_setup(struct media_request *req, 4411 struct v4l2_ctrl_handler *main_hdl) 4412{ 4413 struct media_request_object *obj; 4414 struct v4l2_ctrl_handler *hdl; 4415 struct v4l2_ctrl_ref *ref; 4416 int ret = 0; 4417 4418 if (!req || !main_hdl) 4419 return 0; 4420 4421 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED)) 4422 return -EBUSY; 4423 4424 /* 4425 * Note that it is valid if nothing was found. It means 4426 * that this request doesn't have any controls and so just 4427 * wants to leave the controls unchanged. 4428 */ 4429 obj = media_request_object_find(req, &req_ops, main_hdl); 4430 if (!obj) 4431 return 0; 4432 if (obj->completed) { 4433 media_request_object_put(obj); 4434 return -EBUSY; 4435 } 4436 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj); 4437 4438 list_for_each_entry(ref, &hdl->ctrl_refs, node) 4439 ref->req_done = false; 4440 4441 list_for_each_entry(ref, &hdl->ctrl_refs, node) { 4442 struct v4l2_ctrl *ctrl = ref->ctrl; 4443 struct v4l2_ctrl *master = ctrl->cluster[0]; 4444 bool have_new_data = false; 4445 int i; 4446 4447 /* 4448 * Skip if this control was already handled by a cluster. 4449 * Skip button controls and read-only controls. 4450 */ 4451 if (ref->req_done || ctrl->type == V4L2_CTRL_TYPE_BUTTON || 4452 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)) 4453 continue; 4454 4455 v4l2_ctrl_lock(master); 4456 for (i = 0; i < master->ncontrols; i++) { 4457 if (master->cluster[i]) { 4458 struct v4l2_ctrl_ref *r = 4459 find_ref(hdl, master->cluster[i]->id); 4460 4461 if (r->valid_p_req) { 4462 have_new_data = true; 4463 break; 4464 } 4465 } 4466 } 4467 if (!have_new_data) { 4468 v4l2_ctrl_unlock(master); 4469 continue; 4470 } 4471 4472 for (i = 0; i < master->ncontrols; i++) { 4473 if (master->cluster[i]) { 4474 struct v4l2_ctrl_ref *r = 4475 find_ref(hdl, master->cluster[i]->id); 4476 4477 req_to_new(r); 4478 master->cluster[i]->is_new = 1; 4479 r->req_done = true; 4480 } 4481 } 4482 /* 4483 * For volatile autoclusters that are currently in auto mode 4484 * we need to discover if it will be set to manual mode. 4485 * If so, then we have to copy the current volatile values 4486 * first since those will become the new manual values (which 4487 * may be overwritten by explicit new values from this set 4488 * of controls). 4489 */ 4490 if (master->is_auto && master->has_volatiles && 4491 !is_cur_manual(master)) { 4492 s32 new_auto_val = *master->p_new.p_s32; 4493 4494 /* 4495 * If the new value == the manual value, then copy 4496 * the current volatile values. 4497 */ 4498 if (new_auto_val == master->manual_mode_value) 4499 update_from_auto_cluster(master); 4500 } 4501 4502 ret = try_or_set_cluster(NULL, master, true, 0); 4503 v4l2_ctrl_unlock(master); 4504 4505 if (ret) 4506 break; 4507 } 4508 4509 media_request_object_put(obj); 4510 return ret; 4511} 4512EXPORT_SYMBOL(v4l2_ctrl_request_setup); 4513 4514void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv) 4515{ 4516 if (ctrl == NULL) 4517 return; 4518 if (notify == NULL) { 4519 ctrl->call_notify = 0; 4520 return; 4521 } 4522 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify)) 4523 return; 4524 ctrl->handler->notify = notify; 4525 ctrl->handler->notify_priv = priv; 4526 ctrl->call_notify = 1; 4527} 4528EXPORT_SYMBOL(v4l2_ctrl_notify); 4529 4530int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl, 4531 s64 min, s64 max, u64 step, s64 def) 4532{ 4533 bool value_changed; 4534 bool range_changed = false; 4535 int ret; 4536 4537 lockdep_assert_held(ctrl->handler->lock); 4538 4539 switch (ctrl->type) { 4540 case V4L2_CTRL_TYPE_INTEGER: 4541 case V4L2_CTRL_TYPE_INTEGER64: 4542 case V4L2_CTRL_TYPE_BOOLEAN: 4543 case V4L2_CTRL_TYPE_MENU: 4544 case V4L2_CTRL_TYPE_INTEGER_MENU: 4545 case V4L2_CTRL_TYPE_BITMASK: 4546 case V4L2_CTRL_TYPE_U8: 4547 case V4L2_CTRL_TYPE_U16: 4548 case V4L2_CTRL_TYPE_U32: 4549 if (ctrl->is_array) 4550 return -EINVAL; 4551 ret = check_range(ctrl->type, min, max, step, def); 4552 if (ret) 4553 return ret; 4554 break; 4555 default: 4556 return -EINVAL; 4557 } 4558 if ((ctrl->minimum != min) || (ctrl->maximum != max) || 4559 (ctrl->step != step) || ctrl->default_value != def) { 4560 range_changed = true; 4561 ctrl->minimum = min; 4562 ctrl->maximum = max; 4563 ctrl->step = step; 4564 ctrl->default_value = def; 4565 } 4566 cur_to_new(ctrl); 4567 if (validate_new(ctrl, ctrl->p_new)) { 4568 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64) 4569 *ctrl->p_new.p_s64 = def; 4570 else 4571 *ctrl->p_new.p_s32 = def; 4572 } 4573 4574 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64) 4575 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64; 4576 else 4577 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32; 4578 if (value_changed) 4579 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE); 4580 else if (range_changed) 4581 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE); 4582 return ret; 4583} 4584EXPORT_SYMBOL(__v4l2_ctrl_modify_range); 4585 4586static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) 4587{ 4588 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id); 4589 4590 if (ctrl == NULL) 4591 return -EINVAL; 4592 4593 v4l2_ctrl_lock(ctrl); 4594 list_add_tail(&sev->node, &ctrl->ev_subs); 4595 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS && 4596 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) { 4597 struct v4l2_event ev; 4598 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; 4599 4600 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)) 4601 changes |= V4L2_EVENT_CTRL_CH_VALUE; 4602 fill_event(&ev, ctrl, changes); 4603 /* Mark the queue as active, allowing this initial 4604 event to be accepted. */ 4605 sev->elems = elems; 4606 v4l2_event_queue_fh(sev->fh, &ev); 4607 } 4608 v4l2_ctrl_unlock(ctrl); 4609 return 0; 4610} 4611 4612static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev) 4613{ 4614 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id); 4615 4616 if (ctrl == NULL) 4617 return; 4618 4619 v4l2_ctrl_lock(ctrl); 4620 list_del(&sev->node); 4621 v4l2_ctrl_unlock(ctrl); 4622} 4623 4624void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new) 4625{ 4626 u32 old_changes = old->u.ctrl.changes; 4627 4628 old->u.ctrl = new->u.ctrl; 4629 old->u.ctrl.changes |= old_changes; 4630} 4631EXPORT_SYMBOL(v4l2_ctrl_replace); 4632 4633void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new) 4634{ 4635 new->u.ctrl.changes |= old->u.ctrl.changes; 4636} 4637EXPORT_SYMBOL(v4l2_ctrl_merge); 4638 4639const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = { 4640 .add = v4l2_ctrl_add_event, 4641 .del = v4l2_ctrl_del_event, 4642 .replace = v4l2_ctrl_replace, 4643 .merge = v4l2_ctrl_merge, 4644}; 4645EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops); 4646 4647int v4l2_ctrl_log_status(struct file *file, void *fh) 4648{ 4649 struct video_device *vfd = video_devdata(file); 4650 struct v4l2_fh *vfh = file->private_data; 4651 4652 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev) 4653 v4l2_ctrl_handler_log_status(vfh->ctrl_handler, 4654 vfd->v4l2_dev->name); 4655 return 0; 4656} 4657EXPORT_SYMBOL(v4l2_ctrl_log_status); 4658 4659int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh, 4660 const struct v4l2_event_subscription *sub) 4661{ 4662 if (sub->type == V4L2_EVENT_CTRL) 4663 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops); 4664 return -EINVAL; 4665} 4666EXPORT_SYMBOL(v4l2_ctrl_subscribe_event); 4667 4668int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 4669 struct v4l2_event_subscription *sub) 4670{ 4671 if (!sd->ctrl_handler) 4672 return -EINVAL; 4673 return v4l2_ctrl_subscribe_event(fh, sub); 4674} 4675EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event); 4676 4677__poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait) 4678{ 4679 struct v4l2_fh *fh = file->private_data; 4680 4681 poll_wait(file, &fh->wait, wait); 4682 if (v4l2_event_pending(fh)) 4683 return EPOLLPRI; 4684 return 0; 4685} 4686EXPORT_SYMBOL(v4l2_ctrl_poll); 4687 4688int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl, 4689 const struct v4l2_ctrl_ops *ctrl_ops, 4690 const struct v4l2_fwnode_device_properties *p) 4691{ 4692 if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) { 4693 u32 orientation_ctrl; 4694 4695 switch (p->orientation) { 4696 case V4L2_FWNODE_ORIENTATION_FRONT: 4697 orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT; 4698 break; 4699 case V4L2_FWNODE_ORIENTATION_BACK: 4700 orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK; 4701 break; 4702 case V4L2_FWNODE_ORIENTATION_EXTERNAL: 4703 orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL; 4704 break; 4705 default: 4706 return -EINVAL; 4707 } 4708 if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops, 4709 V4L2_CID_CAMERA_ORIENTATION, 4710 V4L2_CAMERA_ORIENTATION_EXTERNAL, 0, 4711 orientation_ctrl)) 4712 return hdl->error; 4713 } 4714 4715 if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) { 4716 if (!v4l2_ctrl_new_std(hdl, ctrl_ops, 4717 V4L2_CID_CAMERA_SENSOR_ROTATION, 4718 p->rotation, p->rotation, 1, 4719 p->rotation)) 4720 return hdl->error; 4721 } 4722 4723 return hdl->error; 4724} 4725EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties); 4726