2 V4L2 controls framework implementation.
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/ctype.h>
22 #include <linux/slab.h>
23 #include <linux/export.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-dev.h>
30 #define has_op(master, op) \
31 (master->ops && master->ops->op)
32 #define call_op(master, op) \
33 (has_op(master, op) ? master->ops->op(master) : 0)
35 /* Internal temporary helper struct, one for each v4l2_ext_control */
36 struct v4l2_ctrl_helper
{
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref
*mref
;
39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl
*ctrl
;
41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
46 /* Small helper function to determine if the autocluster is set to manual
48 static bool is_cur_manual(const struct v4l2_ctrl
*master
)
50 return master
->is_auto
&& master
->cur
.val
== master
->manual_mode_value
;
53 /* Same as above, but this checks the against the new value instead of the
55 static bool is_new_manual(const struct v4l2_ctrl
*master
)
57 return master
->is_auto
&& master
->val
== master
->manual_mode_value
;
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. */
64 const char * const *v4l2_ctrl_get_menu(u32 id
)
66 static const char * const mpeg_audio_sampling_freq
[] = {
72 static const char * const mpeg_audio_encoding
[] = {
80 static const char * const mpeg_audio_l1_bitrate
[] = {
97 static const char * const mpeg_audio_l2_bitrate
[] = {
114 static const char * const mpeg_audio_l3_bitrate
[] = {
131 static const char * const mpeg_audio_ac3_bitrate
[] = {
153 static const char * const mpeg_audio_mode
[] = {
160 static const char * const mpeg_audio_mode_extension
[] = {
167 static const char * const mpeg_audio_emphasis
[] = {
173 static const char * const mpeg_audio_crc
[] = {
178 static const char * const mpeg_audio_dec_playback
[] = {
187 static const char * const mpeg_video_encoding
[] = {
193 static const char * const mpeg_video_aspect
[] = {
200 static const char * const mpeg_video_bitrate_mode
[] = {
205 static const char * const mpeg_stream_type
[] = {
206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
214 static const char * const mpeg_stream_vbi_fmt
[] = {
216 "Private Packet, IVTV Format",
219 static const char * const camera_power_line_frequency
[] = {
226 static const char * const camera_exposure_auto
[] = {
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
233 static const char * const camera_exposure_metering
[] = {
240 static const char * const camera_auto_focus_range
[] = {
247 static const char * const colorfx
[] = {
266 static const char * const auto_n_preset_white_balance
[] = {
279 static const char * const camera_iso_sensitivity_auto
[] = {
284 static const char * const scene_mode
[] = {
301 static const char * const tune_emphasis
[] = {
307 static const char * const header_mode
[] = {
309 "Joined With 1st Frame",
312 static const char * const multi_slice
[] = {
318 static const char * const entropy_mode
[] = {
323 static const char * const mpeg_h264_level
[] = {
342 static const char * const h264_loop_filter
[] = {
345 "Disabled at Slice Boundary",
348 static const char * const h264_profile
[] = {
350 "Constrained Baseline",
356 "High 444 Predictive",
363 "Scalable High Intra",
367 static const char * const vui_sar_idc
[] = {
388 static const char * const h264_fp_arrangement_type
[] = {
397 static const char * const h264_fmo_map_type
[] = {
398 "Interleaved Slices",
400 "Foreground with Leftover",
407 static const char * const mpeg_mpeg4_level
[] = {
418 static const char * const mpeg4_profile
[] = {
423 "Advanced Coding Efficiency",
427 static const char * const vpx_golden_frame_sel
[] = {
428 "Use Previous Frame",
429 "Use Previous Specific Frame",
433 static const char * const flash_led_mode
[] = {
439 static const char * const flash_strobe_source
[] = {
445 static const char * const jpeg_chroma_subsampling
[] = {
454 static const char * const dv_tx_mode
[] = {
459 static const char * const dv_rgb_range
[] = {
461 "RGB limited range (16-235)",
462 "RGB full range (0-255)",
468 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ
:
469 return mpeg_audio_sampling_freq
;
470 case V4L2_CID_MPEG_AUDIO_ENCODING
:
471 return mpeg_audio_encoding
;
472 case V4L2_CID_MPEG_AUDIO_L1_BITRATE
:
473 return mpeg_audio_l1_bitrate
;
474 case V4L2_CID_MPEG_AUDIO_L2_BITRATE
:
475 return mpeg_audio_l2_bitrate
;
476 case V4L2_CID_MPEG_AUDIO_L3_BITRATE
:
477 return mpeg_audio_l3_bitrate
;
478 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE
:
479 return mpeg_audio_ac3_bitrate
;
480 case V4L2_CID_MPEG_AUDIO_MODE
:
481 return mpeg_audio_mode
;
482 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
:
483 return mpeg_audio_mode_extension
;
484 case V4L2_CID_MPEG_AUDIO_EMPHASIS
:
485 return mpeg_audio_emphasis
;
486 case V4L2_CID_MPEG_AUDIO_CRC
:
487 return mpeg_audio_crc
;
488 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK
:
489 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK
:
490 return mpeg_audio_dec_playback
;
491 case V4L2_CID_MPEG_VIDEO_ENCODING
:
492 return mpeg_video_encoding
;
493 case V4L2_CID_MPEG_VIDEO_ASPECT
:
494 return mpeg_video_aspect
;
495 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE
:
496 return mpeg_video_bitrate_mode
;
497 case V4L2_CID_MPEG_STREAM_TYPE
:
498 return mpeg_stream_type
;
499 case V4L2_CID_MPEG_STREAM_VBI_FMT
:
500 return mpeg_stream_vbi_fmt
;
501 case V4L2_CID_POWER_LINE_FREQUENCY
:
502 return camera_power_line_frequency
;
503 case V4L2_CID_EXPOSURE_AUTO
:
504 return camera_exposure_auto
;
505 case V4L2_CID_EXPOSURE_METERING
:
506 return camera_exposure_metering
;
507 case V4L2_CID_AUTO_FOCUS_RANGE
:
508 return camera_auto_focus_range
;
509 case V4L2_CID_COLORFX
:
511 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE
:
512 return auto_n_preset_white_balance
;
513 case V4L2_CID_ISO_SENSITIVITY_AUTO
:
514 return camera_iso_sensitivity_auto
;
515 case V4L2_CID_SCENE_MODE
:
517 case V4L2_CID_TUNE_PREEMPHASIS
:
518 return tune_emphasis
;
519 case V4L2_CID_TUNE_DEEMPHASIS
:
520 return tune_emphasis
;
521 case V4L2_CID_FLASH_LED_MODE
:
522 return flash_led_mode
;
523 case V4L2_CID_FLASH_STROBE_SOURCE
:
524 return flash_strobe_source
;
525 case V4L2_CID_MPEG_VIDEO_HEADER_MODE
:
527 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE
:
529 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE
:
531 case V4L2_CID_MPEG_VIDEO_H264_LEVEL
:
532 return mpeg_h264_level
;
533 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE
:
534 return h264_loop_filter
;
535 case V4L2_CID_MPEG_VIDEO_H264_PROFILE
:
537 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC
:
539 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE
:
540 return h264_fp_arrangement_type
;
541 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE
:
542 return h264_fmo_map_type
;
543 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL
:
544 return mpeg_mpeg4_level
;
545 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE
:
546 return mpeg4_profile
;
547 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL
:
548 return vpx_golden_frame_sel
;
549 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING
:
550 return jpeg_chroma_subsampling
;
551 case V4L2_CID_DV_TX_MODE
:
553 case V4L2_CID_DV_TX_RGB_RANGE
:
554 case V4L2_CID_DV_RX_RGB_RANGE
:
561 EXPORT_SYMBOL(v4l2_ctrl_get_menu
);
563 #define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
565 * Returns NULL or an s64 type array containing the menu for given
566 * control ID. The total number of the menu items is returned in @len.
568 const s64
*v4l2_ctrl_get_int_menu(u32 id
, u32
*len
)
570 static const s64 qmenu_int_vpx_num_partitions
[] = {
574 static const s64 qmenu_int_vpx_num_ref_frames
[] = {
579 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS
:
580 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions
, len
);
581 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES
:
582 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames
, len
);
588 EXPORT_SYMBOL(v4l2_ctrl_get_int_menu
);
590 /* Return the control name. */
591 const char *v4l2_ctrl_get_name(u32 id
)
595 /* Keep the order of the 'case's the same as in videodev2.h! */
596 case V4L2_CID_USER_CLASS
: return "User Controls";
597 case V4L2_CID_BRIGHTNESS
: return "Brightness";
598 case V4L2_CID_CONTRAST
: return "Contrast";
599 case V4L2_CID_SATURATION
: return "Saturation";
600 case V4L2_CID_HUE
: return "Hue";
601 case V4L2_CID_AUDIO_VOLUME
: return "Volume";
602 case V4L2_CID_AUDIO_BALANCE
: return "Balance";
603 case V4L2_CID_AUDIO_BASS
: return "Bass";
604 case V4L2_CID_AUDIO_TREBLE
: return "Treble";
605 case V4L2_CID_AUDIO_MUTE
: return "Mute";
606 case V4L2_CID_AUDIO_LOUDNESS
: return "Loudness";
607 case V4L2_CID_BLACK_LEVEL
: return "Black Level";
608 case V4L2_CID_AUTO_WHITE_BALANCE
: return "White Balance, Automatic";
609 case V4L2_CID_DO_WHITE_BALANCE
: return "Do White Balance";
610 case V4L2_CID_RED_BALANCE
: return "Red Balance";
611 case V4L2_CID_BLUE_BALANCE
: return "Blue Balance";
612 case V4L2_CID_GAMMA
: return "Gamma";
613 case V4L2_CID_EXPOSURE
: return "Exposure";
614 case V4L2_CID_AUTOGAIN
: return "Gain, Automatic";
615 case V4L2_CID_GAIN
: return "Gain";
616 case V4L2_CID_HFLIP
: return "Horizontal Flip";
617 case V4L2_CID_VFLIP
: return "Vertical Flip";
618 case V4L2_CID_POWER_LINE_FREQUENCY
: return "Power Line Frequency";
619 case V4L2_CID_HUE_AUTO
: return "Hue, Automatic";
620 case V4L2_CID_WHITE_BALANCE_TEMPERATURE
: return "White Balance Temperature";
621 case V4L2_CID_SHARPNESS
: return "Sharpness";
622 case V4L2_CID_BACKLIGHT_COMPENSATION
: return "Backlight Compensation";
623 case V4L2_CID_CHROMA_AGC
: return "Chroma AGC";
624 case V4L2_CID_COLOR_KILLER
: return "Color Killer";
625 case V4L2_CID_COLORFX
: return "Color Effects";
626 case V4L2_CID_AUTOBRIGHTNESS
: return "Brightness, Automatic";
627 case V4L2_CID_BAND_STOP_FILTER
: return "Band-Stop Filter";
628 case V4L2_CID_ROTATE
: return "Rotate";
629 case V4L2_CID_BG_COLOR
: return "Background Color";
630 case V4L2_CID_CHROMA_GAIN
: return "Chroma Gain";
631 case V4L2_CID_ILLUMINATORS_1
: return "Illuminator 1";
632 case V4L2_CID_ILLUMINATORS_2
: return "Illuminator 2";
633 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE
: return "Min Number of Capture Buffers";
634 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT
: return "Min Number of Output Buffers";
635 case V4L2_CID_ALPHA_COMPONENT
: return "Alpha Component";
636 case V4L2_CID_COLORFX_CBCR
: return "Color Effects, CbCr";
639 /* The MPEG controls are applicable to all codec controls
640 * and the 'MPEG' part of the define is historical */
641 /* Keep the order of the 'case's the same as in videodev2.h! */
642 case V4L2_CID_MPEG_CLASS
: return "Codec Controls";
643 case V4L2_CID_MPEG_STREAM_TYPE
: return "Stream Type";
644 case V4L2_CID_MPEG_STREAM_PID_PMT
: return "Stream PMT Program ID";
645 case V4L2_CID_MPEG_STREAM_PID_AUDIO
: return "Stream Audio Program ID";
646 case V4L2_CID_MPEG_STREAM_PID_VIDEO
: return "Stream Video Program ID";
647 case V4L2_CID_MPEG_STREAM_PID_PCR
: return "Stream PCR Program ID";
648 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO
: return "Stream PES Audio ID";
649 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO
: return "Stream PES Video ID";
650 case V4L2_CID_MPEG_STREAM_VBI_FMT
: return "Stream VBI Format";
651 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ
: return "Audio Sampling Frequency";
652 case V4L2_CID_MPEG_AUDIO_ENCODING
: return "Audio Encoding";
653 case V4L2_CID_MPEG_AUDIO_L1_BITRATE
: return "Audio Layer I Bitrate";
654 case V4L2_CID_MPEG_AUDIO_L2_BITRATE
: return "Audio Layer II Bitrate";
655 case V4L2_CID_MPEG_AUDIO_L3_BITRATE
: return "Audio Layer III Bitrate";
656 case V4L2_CID_MPEG_AUDIO_MODE
: return "Audio Stereo Mode";
657 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
: return "Audio Stereo Mode Extension";
658 case V4L2_CID_MPEG_AUDIO_EMPHASIS
: return "Audio Emphasis";
659 case V4L2_CID_MPEG_AUDIO_CRC
: return "Audio CRC";
660 case V4L2_CID_MPEG_AUDIO_MUTE
: return "Audio Mute";
661 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE
: return "Audio AAC Bitrate";
662 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE
: return "Audio AC-3 Bitrate";
663 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK
: return "Audio Playback";
664 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK
: return "Audio Multilingual Playback";
665 case V4L2_CID_MPEG_VIDEO_ENCODING
: return "Video Encoding";
666 case V4L2_CID_MPEG_VIDEO_ASPECT
: return "Video Aspect";
667 case V4L2_CID_MPEG_VIDEO_B_FRAMES
: return "Video B Frames";
668 case V4L2_CID_MPEG_VIDEO_GOP_SIZE
: return "Video GOP Size";
669 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE
: return "Video GOP Closure";
670 case V4L2_CID_MPEG_VIDEO_PULLDOWN
: return "Video Pulldown";
671 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE
: return "Video Bitrate Mode";
672 case V4L2_CID_MPEG_VIDEO_BITRATE
: return "Video Bitrate";
673 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK
: return "Video Peak Bitrate";
674 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION
: return "Video Temporal Decimation";
675 case V4L2_CID_MPEG_VIDEO_MUTE
: return "Video Mute";
676 case V4L2_CID_MPEG_VIDEO_MUTE_YUV
: return "Video Mute YUV";
677 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE
: return "Decoder Slice Interface";
678 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER
: return "MPEG4 Loop Filter Enable";
679 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB
: return "Number of Intra Refresh MBs";
680 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE
: return "Frame Level Rate Control Enable";
681 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE
: return "H264 MB Level Rate Control";
682 case V4L2_CID_MPEG_VIDEO_HEADER_MODE
: return "Sequence Header Mode";
683 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC
: return "Max Number of Reference Pics";
684 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP
: return "H263 I-Frame QP Value";
685 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP
: return "H263 P-Frame QP Value";
686 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP
: return "H263 B-Frame QP Value";
687 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP
: return "H263 Minimum QP Value";
688 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP
: return "H263 Maximum QP Value";
689 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP
: return "H264 I-Frame QP Value";
690 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP
: return "H264 P-Frame QP Value";
691 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP
: return "H264 B-Frame QP Value";
692 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP
: return "H264 Maximum QP Value";
693 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP
: return "H264 Minimum QP Value";
694 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM
: return "H264 8x8 Transform Enable";
695 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE
: return "H264 CPB Buffer Size";
696 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE
: return "H264 Entropy Mode";
697 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD
: return "H264 I-Frame Period";
698 case V4L2_CID_MPEG_VIDEO_H264_LEVEL
: return "H264 Level";
699 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA
: return "H264 Loop Filter Alpha Offset";
700 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA
: return "H264 Loop Filter Beta Offset";
701 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE
: return "H264 Loop Filter Mode";
702 case V4L2_CID_MPEG_VIDEO_H264_PROFILE
: return "H264 Profile";
703 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT
: return "Vertical Size of SAR";
704 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH
: return "Horizontal Size of SAR";
705 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE
: return "Aspect Ratio VUI Enable";
706 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC
: return "VUI Aspect Ratio IDC";
707 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING
: return "H264 Enable Frame Packing SEI";
708 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0
: return "H264 Set Curr. Frame as Frame0";
709 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE
: return "H264 FP Arrangement Type";
710 case V4L2_CID_MPEG_VIDEO_H264_FMO
: return "H264 Flexible MB Ordering";
711 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE
: return "H264 Map Type for FMO";
712 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP
: return "H264 FMO Number of Slice Groups";
713 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION
: return "H264 FMO Direction of Change";
714 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE
: return "H264 FMO Size of 1st Slice Grp";
715 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH
: return "H264 FMO No. of Consecutive MBs";
716 case V4L2_CID_MPEG_VIDEO_H264_ASO
: return "H264 Arbitrary Slice Ordering";
717 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER
: return "H264 ASO Slice Order";
718 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING
: return "Enable H264 Hierarchical Coding";
719 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE
: return "H264 Hierarchical Coding Type";
720 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER
:return "H264 Number of HC Layers";
721 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP
:
722 return "H264 Set QP Value for HC Layers";
723 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP
: return "MPEG4 I-Frame QP Value";
724 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP
: return "MPEG4 P-Frame QP Value";
725 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP
: return "MPEG4 B-Frame QP Value";
726 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP
: return "MPEG4 Minimum QP Value";
727 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP
: return "MPEG4 Maximum QP Value";
728 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL
: return "MPEG4 Level";
729 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE
: return "MPEG4 Profile";
730 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL
: return "Quarter Pixel Search Enable";
731 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES
: return "Maximum Bytes in a Slice";
732 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB
: return "Number of MBs in a Slice";
733 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE
: return "Slice Partitioning Method";
734 case V4L2_CID_MPEG_VIDEO_VBV_SIZE
: return "VBV Buffer Size";
735 case V4L2_CID_MPEG_VIDEO_DEC_PTS
: return "Video Decoder PTS";
736 case V4L2_CID_MPEG_VIDEO_DEC_FRAME
: return "Video Decoder Frame Count";
737 case V4L2_CID_MPEG_VIDEO_VBV_DELAY
: return "Initial Delay for VBV Control";
738 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER
: return "Repeat Sequence Header";
741 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS
: return "VPX Number of Partitions";
742 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4
: return "VPX Intra Mode Decision Disable";
743 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES
: return "VPX No. of Refs for P Frame";
744 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL
: return "VPX Loop Filter Level Range";
745 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS
: return "VPX Deblocking Effect Control";
746 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD
: return "VPX Golden Frame Refresh Period";
747 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL
: return "VPX Golden Frame Indicator";
748 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP
: return "VPX Minimum QP Value";
749 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP
: return "VPX Maximum QP Value";
750 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP
: return "VPX I-Frame QP Value";
751 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP
: return "VPX P-Frame QP Value";
753 /* CAMERA controls */
754 /* Keep the order of the 'case's the same as in videodev2.h! */
755 case V4L2_CID_CAMERA_CLASS
: return "Camera Controls";
756 case V4L2_CID_EXPOSURE_AUTO
: return "Auto Exposure";
757 case V4L2_CID_EXPOSURE_ABSOLUTE
: return "Exposure Time, Absolute";
758 case V4L2_CID_EXPOSURE_AUTO_PRIORITY
: return "Exposure, Dynamic Framerate";
759 case V4L2_CID_PAN_RELATIVE
: return "Pan, Relative";
760 case V4L2_CID_TILT_RELATIVE
: return "Tilt, Relative";
761 case V4L2_CID_PAN_RESET
: return "Pan, Reset";
762 case V4L2_CID_TILT_RESET
: return "Tilt, Reset";
763 case V4L2_CID_PAN_ABSOLUTE
: return "Pan, Absolute";
764 case V4L2_CID_TILT_ABSOLUTE
: return "Tilt, Absolute";
765 case V4L2_CID_FOCUS_ABSOLUTE
: return "Focus, Absolute";
766 case V4L2_CID_FOCUS_RELATIVE
: return "Focus, Relative";
767 case V4L2_CID_FOCUS_AUTO
: return "Focus, Automatic Continuous";
768 case V4L2_CID_ZOOM_ABSOLUTE
: return "Zoom, Absolute";
769 case V4L2_CID_ZOOM_RELATIVE
: return "Zoom, Relative";
770 case V4L2_CID_ZOOM_CONTINUOUS
: return "Zoom, Continuous";
771 case V4L2_CID_PRIVACY
: return "Privacy";
772 case V4L2_CID_IRIS_ABSOLUTE
: return "Iris, Absolute";
773 case V4L2_CID_IRIS_RELATIVE
: return "Iris, Relative";
774 case V4L2_CID_AUTO_EXPOSURE_BIAS
: return "Auto Exposure, Bias";
775 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE
: return "White Balance, Auto & Preset";
776 case V4L2_CID_WIDE_DYNAMIC_RANGE
: return "Wide Dynamic Range";
777 case V4L2_CID_IMAGE_STABILIZATION
: return "Image Stabilization";
778 case V4L2_CID_ISO_SENSITIVITY
: return "ISO Sensitivity";
779 case V4L2_CID_ISO_SENSITIVITY_AUTO
: return "ISO Sensitivity, Auto";
780 case V4L2_CID_EXPOSURE_METERING
: return "Exposure, Metering Mode";
781 case V4L2_CID_SCENE_MODE
: return "Scene Mode";
782 case V4L2_CID_3A_LOCK
: return "3A Lock";
783 case V4L2_CID_AUTO_FOCUS_START
: return "Auto Focus, Start";
784 case V4L2_CID_AUTO_FOCUS_STOP
: return "Auto Focus, Stop";
785 case V4L2_CID_AUTO_FOCUS_STATUS
: return "Auto Focus, Status";
786 case V4L2_CID_AUTO_FOCUS_RANGE
: return "Auto Focus, Range";
788 /* FM Radio Modulator control */
789 /* Keep the order of the 'case's the same as in videodev2.h! */
790 case V4L2_CID_FM_TX_CLASS
: return "FM Radio Modulator Controls";
791 case V4L2_CID_RDS_TX_DEVIATION
: return "RDS Signal Deviation";
792 case V4L2_CID_RDS_TX_PI
: return "RDS Program ID";
793 case V4L2_CID_RDS_TX_PTY
: return "RDS Program Type";
794 case V4L2_CID_RDS_TX_PS_NAME
: return "RDS PS Name";
795 case V4L2_CID_RDS_TX_RADIO_TEXT
: return "RDS Radio Text";
796 case V4L2_CID_AUDIO_LIMITER_ENABLED
: return "Audio Limiter Feature Enabled";
797 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME
: return "Audio Limiter Release Time";
798 case V4L2_CID_AUDIO_LIMITER_DEVIATION
: return "Audio Limiter Deviation";
799 case V4L2_CID_AUDIO_COMPRESSION_ENABLED
: return "Audio Compression Enabled";
800 case V4L2_CID_AUDIO_COMPRESSION_GAIN
: return "Audio Compression Gain";
801 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD
: return "Audio Compression Threshold";
802 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME
: return "Audio Compression Attack Time";
803 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME
: return "Audio Compression Release Time";
804 case V4L2_CID_PILOT_TONE_ENABLED
: return "Pilot Tone Feature Enabled";
805 case V4L2_CID_PILOT_TONE_DEVIATION
: return "Pilot Tone Deviation";
806 case V4L2_CID_PILOT_TONE_FREQUENCY
: return "Pilot Tone Frequency";
807 case V4L2_CID_TUNE_PREEMPHASIS
: return "Pre-Emphasis";
808 case V4L2_CID_TUNE_POWER_LEVEL
: return "Tune Power Level";
809 case V4L2_CID_TUNE_ANTENNA_CAPACITOR
: return "Tune Antenna Capacitor";
812 case V4L2_CID_FLASH_CLASS
: return "Flash Controls";
813 case V4L2_CID_FLASH_LED_MODE
: return "LED Mode";
814 case V4L2_CID_FLASH_STROBE_SOURCE
: return "Strobe Source";
815 case V4L2_CID_FLASH_STROBE
: return "Strobe";
816 case V4L2_CID_FLASH_STROBE_STOP
: return "Stop Strobe";
817 case V4L2_CID_FLASH_STROBE_STATUS
: return "Strobe Status";
818 case V4L2_CID_FLASH_TIMEOUT
: return "Strobe Timeout";
819 case V4L2_CID_FLASH_INTENSITY
: return "Intensity, Flash Mode";
820 case V4L2_CID_FLASH_TORCH_INTENSITY
: return "Intensity, Torch Mode";
821 case V4L2_CID_FLASH_INDICATOR_INTENSITY
: return "Intensity, Indicator";
822 case V4L2_CID_FLASH_FAULT
: return "Faults";
823 case V4L2_CID_FLASH_CHARGE
: return "Charge";
824 case V4L2_CID_FLASH_READY
: return "Ready to Strobe";
826 /* JPEG encoder controls */
827 /* Keep the order of the 'case's the same as in videodev2.h! */
828 case V4L2_CID_JPEG_CLASS
: return "JPEG Compression Controls";
829 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING
: return "Chroma Subsampling";
830 case V4L2_CID_JPEG_RESTART_INTERVAL
: return "Restart Interval";
831 case V4L2_CID_JPEG_COMPRESSION_QUALITY
: return "Compression Quality";
832 case V4L2_CID_JPEG_ACTIVE_MARKER
: return "Active Markers";
834 /* Image source controls */
835 case V4L2_CID_IMAGE_SOURCE_CLASS
: return "Image Source Controls";
836 case V4L2_CID_VBLANK
: return "Vertical Blanking";
837 case V4L2_CID_HBLANK
: return "Horizontal Blanking";
838 case V4L2_CID_ANALOGUE_GAIN
: return "Analogue Gain";
840 /* Image processing controls */
841 case V4L2_CID_IMAGE_PROC_CLASS
: return "Image Processing Controls";
842 case V4L2_CID_LINK_FREQ
: return "Link Frequency";
843 case V4L2_CID_PIXEL_RATE
: return "Pixel Rate";
844 case V4L2_CID_TEST_PATTERN
: return "Test Pattern";
847 case V4L2_CID_DV_CLASS
: return "Digital Video Controls";
848 case V4L2_CID_DV_TX_HOTPLUG
: return "Hotplug Present";
849 case V4L2_CID_DV_TX_RXSENSE
: return "RxSense Present";
850 case V4L2_CID_DV_TX_EDID_PRESENT
: return "EDID Present";
851 case V4L2_CID_DV_TX_MODE
: return "Transmit Mode";
852 case V4L2_CID_DV_TX_RGB_RANGE
: return "Tx RGB Quantization Range";
853 case V4L2_CID_DV_RX_POWER_PRESENT
: return "Power Present";
854 case V4L2_CID_DV_RX_RGB_RANGE
: return "Rx RGB Quantization Range";
856 case V4L2_CID_FM_RX_CLASS
: return "FM Radio Receiver Controls";
857 case V4L2_CID_TUNE_DEEMPHASIS
: return "De-Emphasis";
858 case V4L2_CID_RDS_RECEPTION
: return "RDS Reception";
863 EXPORT_SYMBOL(v4l2_ctrl_get_name
);
865 void v4l2_ctrl_fill(u32 id
, const char **name
, enum v4l2_ctrl_type
*type
,
866 s32
*min
, s32
*max
, s32
*step
, s32
*def
, u32
*flags
)
868 *name
= v4l2_ctrl_get_name(id
);
872 case V4L2_CID_AUDIO_MUTE
:
873 case V4L2_CID_AUDIO_LOUDNESS
:
874 case V4L2_CID_AUTO_WHITE_BALANCE
:
875 case V4L2_CID_AUTOGAIN
:
878 case V4L2_CID_HUE_AUTO
:
879 case V4L2_CID_CHROMA_AGC
:
880 case V4L2_CID_COLOR_KILLER
:
881 case V4L2_CID_AUTOBRIGHTNESS
:
882 case V4L2_CID_MPEG_AUDIO_MUTE
:
883 case V4L2_CID_MPEG_VIDEO_MUTE
:
884 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE
:
885 case V4L2_CID_MPEG_VIDEO_PULLDOWN
:
886 case V4L2_CID_EXPOSURE_AUTO_PRIORITY
:
887 case V4L2_CID_FOCUS_AUTO
:
888 case V4L2_CID_PRIVACY
:
889 case V4L2_CID_AUDIO_LIMITER_ENABLED
:
890 case V4L2_CID_AUDIO_COMPRESSION_ENABLED
:
891 case V4L2_CID_PILOT_TONE_ENABLED
:
892 case V4L2_CID_ILLUMINATORS_1
:
893 case V4L2_CID_ILLUMINATORS_2
:
894 case V4L2_CID_FLASH_STROBE_STATUS
:
895 case V4L2_CID_FLASH_CHARGE
:
896 case V4L2_CID_FLASH_READY
:
897 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER
:
898 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE
:
899 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE
:
900 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE
:
901 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM
:
902 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE
:
903 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL
:
904 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER
:
905 case V4L2_CID_WIDE_DYNAMIC_RANGE
:
906 case V4L2_CID_IMAGE_STABILIZATION
:
907 case V4L2_CID_RDS_RECEPTION
:
908 *type
= V4L2_CTRL_TYPE_BOOLEAN
;
912 case V4L2_CID_PAN_RESET
:
913 case V4L2_CID_TILT_RESET
:
914 case V4L2_CID_FLASH_STROBE
:
915 case V4L2_CID_FLASH_STROBE_STOP
:
916 case V4L2_CID_AUTO_FOCUS_START
:
917 case V4L2_CID_AUTO_FOCUS_STOP
:
918 *type
= V4L2_CTRL_TYPE_BUTTON
;
919 *flags
|= V4L2_CTRL_FLAG_WRITE_ONLY
;
920 *min
= *max
= *step
= *def
= 0;
922 case V4L2_CID_POWER_LINE_FREQUENCY
:
923 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ
:
924 case V4L2_CID_MPEG_AUDIO_ENCODING
:
925 case V4L2_CID_MPEG_AUDIO_L1_BITRATE
:
926 case V4L2_CID_MPEG_AUDIO_L2_BITRATE
:
927 case V4L2_CID_MPEG_AUDIO_L3_BITRATE
:
928 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE
:
929 case V4L2_CID_MPEG_AUDIO_MODE
:
930 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
:
931 case V4L2_CID_MPEG_AUDIO_EMPHASIS
:
932 case V4L2_CID_MPEG_AUDIO_CRC
:
933 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK
:
934 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK
:
935 case V4L2_CID_MPEG_VIDEO_ENCODING
:
936 case V4L2_CID_MPEG_VIDEO_ASPECT
:
937 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE
:
938 case V4L2_CID_MPEG_STREAM_TYPE
:
939 case V4L2_CID_MPEG_STREAM_VBI_FMT
:
940 case V4L2_CID_EXPOSURE_AUTO
:
941 case V4L2_CID_AUTO_FOCUS_RANGE
:
942 case V4L2_CID_COLORFX
:
943 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE
:
944 case V4L2_CID_TUNE_PREEMPHASIS
:
945 case V4L2_CID_FLASH_LED_MODE
:
946 case V4L2_CID_FLASH_STROBE_SOURCE
:
947 case V4L2_CID_MPEG_VIDEO_HEADER_MODE
:
948 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE
:
949 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE
:
950 case V4L2_CID_MPEG_VIDEO_H264_LEVEL
:
951 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE
:
952 case V4L2_CID_MPEG_VIDEO_H264_PROFILE
:
953 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC
:
954 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE
:
955 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE
:
956 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL
:
957 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE
:
958 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING
:
959 case V4L2_CID_ISO_SENSITIVITY_AUTO
:
960 case V4L2_CID_EXPOSURE_METERING
:
961 case V4L2_CID_SCENE_MODE
:
962 case V4L2_CID_DV_TX_MODE
:
963 case V4L2_CID_DV_TX_RGB_RANGE
:
964 case V4L2_CID_DV_RX_RGB_RANGE
:
965 case V4L2_CID_TEST_PATTERN
:
966 case V4L2_CID_TUNE_DEEMPHASIS
:
967 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL
:
968 *type
= V4L2_CTRL_TYPE_MENU
;
970 case V4L2_CID_LINK_FREQ
:
971 *type
= V4L2_CTRL_TYPE_INTEGER_MENU
;
973 case V4L2_CID_RDS_TX_PS_NAME
:
974 case V4L2_CID_RDS_TX_RADIO_TEXT
:
975 *type
= V4L2_CTRL_TYPE_STRING
;
977 case V4L2_CID_ISO_SENSITIVITY
:
978 case V4L2_CID_AUTO_EXPOSURE_BIAS
:
979 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS
:
980 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES
:
981 *type
= V4L2_CTRL_TYPE_INTEGER_MENU
;
983 case V4L2_CID_USER_CLASS
:
984 case V4L2_CID_CAMERA_CLASS
:
985 case V4L2_CID_MPEG_CLASS
:
986 case V4L2_CID_FM_TX_CLASS
:
987 case V4L2_CID_FLASH_CLASS
:
988 case V4L2_CID_JPEG_CLASS
:
989 case V4L2_CID_IMAGE_SOURCE_CLASS
:
990 case V4L2_CID_IMAGE_PROC_CLASS
:
991 case V4L2_CID_DV_CLASS
:
992 case V4L2_CID_FM_RX_CLASS
:
993 *type
= V4L2_CTRL_TYPE_CTRL_CLASS
;
994 /* You can neither read not write these */
995 *flags
|= V4L2_CTRL_FLAG_READ_ONLY
| V4L2_CTRL_FLAG_WRITE_ONLY
;
996 *min
= *max
= *step
= *def
= 0;
998 case V4L2_CID_BG_COLOR
:
999 *type
= V4L2_CTRL_TYPE_INTEGER
;
1002 /* Max is calculated as RGB888 that is 2^24 */
1005 case V4L2_CID_FLASH_FAULT
:
1006 case V4L2_CID_JPEG_ACTIVE_MARKER
:
1007 case V4L2_CID_3A_LOCK
:
1008 case V4L2_CID_AUTO_FOCUS_STATUS
:
1009 case V4L2_CID_DV_TX_HOTPLUG
:
1010 case V4L2_CID_DV_TX_RXSENSE
:
1011 case V4L2_CID_DV_TX_EDID_PRESENT
:
1012 case V4L2_CID_DV_RX_POWER_PRESENT
:
1013 *type
= V4L2_CTRL_TYPE_BITMASK
;
1015 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE
:
1016 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT
:
1017 *type
= V4L2_CTRL_TYPE_INTEGER
;
1018 *flags
|= V4L2_CTRL_FLAG_READ_ONLY
;
1020 case V4L2_CID_MPEG_VIDEO_DEC_FRAME
:
1021 case V4L2_CID_MPEG_VIDEO_DEC_PTS
:
1022 *flags
|= V4L2_CTRL_FLAG_VOLATILE
;
1024 case V4L2_CID_PIXEL_RATE
:
1025 *type
= V4L2_CTRL_TYPE_INTEGER64
;
1026 *flags
|= V4L2_CTRL_FLAG_READ_ONLY
;
1027 *min
= *max
= *step
= *def
= 0;
1030 *type
= V4L2_CTRL_TYPE_INTEGER
;
1034 case V4L2_CID_MPEG_AUDIO_ENCODING
:
1035 case V4L2_CID_MPEG_AUDIO_MODE
:
1036 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE
:
1037 case V4L2_CID_MPEG_VIDEO_B_FRAMES
:
1038 case V4L2_CID_MPEG_STREAM_TYPE
:
1039 *flags
|= V4L2_CTRL_FLAG_UPDATE
;
1041 case V4L2_CID_AUDIO_VOLUME
:
1042 case V4L2_CID_AUDIO_BALANCE
:
1043 case V4L2_CID_AUDIO_BASS
:
1044 case V4L2_CID_AUDIO_TREBLE
:
1045 case V4L2_CID_BRIGHTNESS
:
1046 case V4L2_CID_CONTRAST
:
1047 case V4L2_CID_SATURATION
:
1049 case V4L2_CID_RED_BALANCE
:
1050 case V4L2_CID_BLUE_BALANCE
:
1051 case V4L2_CID_GAMMA
:
1052 case V4L2_CID_SHARPNESS
:
1053 case V4L2_CID_CHROMA_GAIN
:
1054 case V4L2_CID_RDS_TX_DEVIATION
:
1055 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME
:
1056 case V4L2_CID_AUDIO_LIMITER_DEVIATION
:
1057 case V4L2_CID_AUDIO_COMPRESSION_GAIN
:
1058 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD
:
1059 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME
:
1060 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME
:
1061 case V4L2_CID_PILOT_TONE_DEVIATION
:
1062 case V4L2_CID_PILOT_TONE_FREQUENCY
:
1063 case V4L2_CID_TUNE_POWER_LEVEL
:
1064 case V4L2_CID_TUNE_ANTENNA_CAPACITOR
:
1065 *flags
|= V4L2_CTRL_FLAG_SLIDER
;
1067 case V4L2_CID_PAN_RELATIVE
:
1068 case V4L2_CID_TILT_RELATIVE
:
1069 case V4L2_CID_FOCUS_RELATIVE
:
1070 case V4L2_CID_IRIS_RELATIVE
:
1071 case V4L2_CID_ZOOM_RELATIVE
:
1072 *flags
|= V4L2_CTRL_FLAG_WRITE_ONLY
;
1074 case V4L2_CID_FLASH_STROBE_STATUS
:
1075 case V4L2_CID_AUTO_FOCUS_STATUS
:
1076 case V4L2_CID_FLASH_READY
:
1077 case V4L2_CID_DV_TX_HOTPLUG
:
1078 case V4L2_CID_DV_TX_RXSENSE
:
1079 case V4L2_CID_DV_TX_EDID_PRESENT
:
1080 case V4L2_CID_DV_RX_POWER_PRESENT
:
1081 *flags
|= V4L2_CTRL_FLAG_READ_ONLY
;
1085 EXPORT_SYMBOL(v4l2_ctrl_fill
);
1087 /* Helper function to determine whether the control type is compatible with
1089 static bool type_is_int(const struct v4l2_ctrl
*ctrl
)
1091 switch (ctrl
->type
) {
1092 case V4L2_CTRL_TYPE_INTEGER64
:
1093 case V4L2_CTRL_TYPE_STRING
:
1094 /* Nope, these need v4l2_ext_control */
1101 static void fill_event(struct v4l2_event
*ev
, struct v4l2_ctrl
*ctrl
, u32 changes
)
1103 memset(ev
->reserved
, 0, sizeof(ev
->reserved
));
1104 ev
->type
= V4L2_EVENT_CTRL
;
1106 ev
->u
.ctrl
.changes
= changes
;
1107 ev
->u
.ctrl
.type
= ctrl
->type
;
1108 ev
->u
.ctrl
.flags
= ctrl
->flags
;
1109 if (ctrl
->type
== V4L2_CTRL_TYPE_STRING
)
1110 ev
->u
.ctrl
.value64
= 0;
1112 ev
->u
.ctrl
.value64
= ctrl
->cur
.val64
;
1113 ev
->u
.ctrl
.minimum
= ctrl
->minimum
;
1114 ev
->u
.ctrl
.maximum
= ctrl
->maximum
;
1115 if (ctrl
->type
== V4L2_CTRL_TYPE_MENU
1116 || ctrl
->type
== V4L2_CTRL_TYPE_INTEGER_MENU
)
1117 ev
->u
.ctrl
.step
= 1;
1119 ev
->u
.ctrl
.step
= ctrl
->step
;
1120 ev
->u
.ctrl
.default_value
= ctrl
->default_value
;
1123 static void send_event(struct v4l2_fh
*fh
, struct v4l2_ctrl
*ctrl
, u32 changes
)
1125 struct v4l2_event ev
;
1126 struct v4l2_subscribed_event
*sev
;
1128 if (list_empty(&ctrl
->ev_subs
))
1130 fill_event(&ev
, ctrl
, changes
);
1132 list_for_each_entry(sev
, &ctrl
->ev_subs
, node
)
1133 if (sev
->fh
!= fh
||
1134 (sev
->flags
& V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK
))
1135 v4l2_event_queue_fh(sev
->fh
, &ev
);
1138 /* Helper function: copy the current control value back to the caller */
1139 static int cur_to_user(struct v4l2_ext_control
*c
,
1140 struct v4l2_ctrl
*ctrl
)
1144 switch (ctrl
->type
) {
1145 case V4L2_CTRL_TYPE_STRING
:
1146 len
= strlen(ctrl
->cur
.string
);
1147 if (c
->size
< len
+ 1) {
1151 return copy_to_user(c
->string
, ctrl
->cur
.string
,
1152 len
+ 1) ? -EFAULT
: 0;
1153 case V4L2_CTRL_TYPE_INTEGER64
:
1154 c
->value64
= ctrl
->cur
.val64
;
1157 c
->value
= ctrl
->cur
.val
;
1163 /* Helper function: copy the caller-provider value as the new control value */
1164 static int user_to_new(struct v4l2_ext_control
*c
,
1165 struct v4l2_ctrl
*ctrl
)
1171 switch (ctrl
->type
) {
1172 case V4L2_CTRL_TYPE_INTEGER64
:
1173 ctrl
->val64
= c
->value64
;
1175 case V4L2_CTRL_TYPE_STRING
:
1179 if (size
> ctrl
->maximum
+ 1)
1180 size
= ctrl
->maximum
+ 1;
1181 ret
= copy_from_user(ctrl
->string
, c
->string
, size
);
1183 char last
= ctrl
->string
[size
- 1];
1185 ctrl
->string
[size
- 1] = 0;
1186 /* If the string was longer than ctrl->maximum,
1187 then return an error. */
1188 if (strlen(ctrl
->string
) == ctrl
->maximum
&& last
)
1191 return ret
? -EFAULT
: 0;
1193 ctrl
->val
= c
->value
;
1199 /* Helper function: copy the new control value back to the caller */
1200 static int new_to_user(struct v4l2_ext_control
*c
,
1201 struct v4l2_ctrl
*ctrl
)
1205 switch (ctrl
->type
) {
1206 case V4L2_CTRL_TYPE_STRING
:
1207 len
= strlen(ctrl
->string
);
1208 if (c
->size
< len
+ 1) {
1209 c
->size
= ctrl
->maximum
+ 1;
1212 return copy_to_user(c
->string
, ctrl
->string
,
1213 len
+ 1) ? -EFAULT
: 0;
1214 case V4L2_CTRL_TYPE_INTEGER64
:
1215 c
->value64
= ctrl
->val64
;
1218 c
->value
= ctrl
->val
;
1224 /* Copy the new value to the current value. */
1225 static void new_to_cur(struct v4l2_fh
*fh
, struct v4l2_ctrl
*ctrl
, u32 ch_flags
)
1227 bool changed
= false;
1231 switch (ctrl
->type
) {
1232 case V4L2_CTRL_TYPE_BUTTON
:
1235 case V4L2_CTRL_TYPE_STRING
:
1236 /* strings are always 0-terminated */
1237 changed
= strcmp(ctrl
->string
, ctrl
->cur
.string
);
1238 strcpy(ctrl
->cur
.string
, ctrl
->string
);
1240 case V4L2_CTRL_TYPE_INTEGER64
:
1241 changed
= ctrl
->val64
!= ctrl
->cur
.val64
;
1242 ctrl
->cur
.val64
= ctrl
->val64
;
1245 changed
= ctrl
->val
!= ctrl
->cur
.val
;
1246 ctrl
->cur
.val
= ctrl
->val
;
1249 if (ch_flags
& V4L2_EVENT_CTRL_CH_FLAGS
) {
1250 /* Note: CH_FLAGS is only set for auto clusters. */
1252 ~(V4L2_CTRL_FLAG_INACTIVE
| V4L2_CTRL_FLAG_VOLATILE
);
1253 if (!is_cur_manual(ctrl
->cluster
[0])) {
1254 ctrl
->flags
|= V4L2_CTRL_FLAG_INACTIVE
;
1255 if (ctrl
->cluster
[0]->has_volatiles
)
1256 ctrl
->flags
|= V4L2_CTRL_FLAG_VOLATILE
;
1260 if (changed
|| ch_flags
) {
1261 /* If a control was changed that was not one of the controls
1262 modified by the application, then send the event to all. */
1265 send_event(fh
, ctrl
,
1266 (changed
? V4L2_EVENT_CTRL_CH_VALUE
: 0) | ch_flags
);
1267 if (ctrl
->call_notify
&& changed
&& ctrl
->handler
->notify
)
1268 ctrl
->handler
->notify(ctrl
, ctrl
->handler
->notify_priv
);
1272 /* Copy the current value to the new value */
1273 static void cur_to_new(struct v4l2_ctrl
*ctrl
)
1277 switch (ctrl
->type
) {
1278 case V4L2_CTRL_TYPE_STRING
:
1279 /* strings are always 0-terminated */
1280 strcpy(ctrl
->string
, ctrl
->cur
.string
);
1282 case V4L2_CTRL_TYPE_INTEGER64
:
1283 ctrl
->val64
= ctrl
->cur
.val64
;
1286 ctrl
->val
= ctrl
->cur
.val
;
1291 /* Return non-zero if one or more of the controls in the cluster has a new
1292 value that differs from the current value. */
1293 static int cluster_changed(struct v4l2_ctrl
*master
)
1298 for (i
= 0; !diff
&& i
< master
->ncontrols
; i
++) {
1299 struct v4l2_ctrl
*ctrl
= master
->cluster
[i
];
1303 switch (ctrl
->type
) {
1304 case V4L2_CTRL_TYPE_BUTTON
:
1305 /* Button controls are always 'different' */
1307 case V4L2_CTRL_TYPE_STRING
:
1308 /* strings are always 0-terminated */
1309 diff
= strcmp(ctrl
->string
, ctrl
->cur
.string
);
1311 case V4L2_CTRL_TYPE_INTEGER64
:
1312 diff
= ctrl
->val64
!= ctrl
->cur
.val64
;
1315 diff
= ctrl
->val
!= ctrl
->cur
.val
;
1322 /* Control range checking */
1323 static int check_range(enum v4l2_ctrl_type type
,
1324 s32 min
, s32 max
, u32 step
, s32 def
)
1327 case V4L2_CTRL_TYPE_BOOLEAN
:
1328 if (step
!= 1 || max
> 1 || min
< 0)
1331 case V4L2_CTRL_TYPE_INTEGER
:
1332 if (step
<= 0 || min
> max
|| def
< min
|| def
> max
)
1335 case V4L2_CTRL_TYPE_BITMASK
:
1336 if (step
|| min
|| !max
|| (def
& ~max
))
1339 case V4L2_CTRL_TYPE_MENU
:
1340 case V4L2_CTRL_TYPE_INTEGER_MENU
:
1341 if (min
> max
|| def
< min
|| def
> max
)
1343 /* Note: step == menu_skip_mask for menu controls.
1344 So here we check if the default value is masked out. */
1345 if (step
&& ((1 << def
) & step
))
1348 case V4L2_CTRL_TYPE_STRING
:
1349 if (min
> max
|| min
< 0 || step
< 1 || def
)
1357 /* Validate a new control */
1358 static int validate_new(const struct v4l2_ctrl
*ctrl
,
1359 struct v4l2_ext_control
*c
)
1365 switch (ctrl
->type
) {
1366 case V4L2_CTRL_TYPE_INTEGER
:
1367 /* Round towards the closest legal value */
1368 val
= c
->value
+ ctrl
->step
/ 2;
1369 val
= clamp(val
, ctrl
->minimum
, ctrl
->maximum
);
1370 offset
= val
- ctrl
->minimum
;
1371 offset
= ctrl
->step
* (offset
/ ctrl
->step
);
1372 c
->value
= ctrl
->minimum
+ offset
;
1375 case V4L2_CTRL_TYPE_BOOLEAN
:
1376 c
->value
= !!c
->value
;
1379 case V4L2_CTRL_TYPE_MENU
:
1380 case V4L2_CTRL_TYPE_INTEGER_MENU
:
1381 if (c
->value
< ctrl
->minimum
|| c
->value
> ctrl
->maximum
)
1383 if (ctrl
->menu_skip_mask
& (1 << c
->value
))
1385 if (ctrl
->type
== V4L2_CTRL_TYPE_MENU
&&
1386 ctrl
->qmenu
[c
->value
][0] == '\0')
1390 case V4L2_CTRL_TYPE_BITMASK
:
1391 c
->value
&= ctrl
->maximum
;
1394 case V4L2_CTRL_TYPE_BUTTON
:
1395 case V4L2_CTRL_TYPE_CTRL_CLASS
:
1399 case V4L2_CTRL_TYPE_INTEGER64
:
1402 case V4L2_CTRL_TYPE_STRING
:
1403 len
= strlen(c
->string
);
1404 if (len
< ctrl
->minimum
)
1406 if ((len
- ctrl
->minimum
) % ctrl
->step
)
1415 static inline u32
node2id(struct list_head
*node
)
1417 return list_entry(node
, struct v4l2_ctrl_ref
, node
)->ctrl
->id
;
1420 /* Set the handler's error code if it wasn't set earlier already */
1421 static inline int handler_set_err(struct v4l2_ctrl_handler
*hdl
, int err
)
1423 if (hdl
->error
== 0)
1428 /* Initialize the handler */
1429 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler
*hdl
,
1430 unsigned nr_of_controls_hint
,
1431 struct lock_class_key
*key
, const char *name
)
1433 hdl
->lock
= &hdl
->_lock
;
1434 mutex_init(hdl
->lock
);
1435 lockdep_set_class_and_name(hdl
->lock
, key
, name
);
1436 INIT_LIST_HEAD(&hdl
->ctrls
);
1437 INIT_LIST_HEAD(&hdl
->ctrl_refs
);
1438 hdl
->nr_of_buckets
= 1 + nr_of_controls_hint
/ 8;
1439 hdl
->buckets
= kcalloc(hdl
->nr_of_buckets
, sizeof(hdl
->buckets
[0]),
1441 hdl
->error
= hdl
->buckets
? 0 : -ENOMEM
;
1444 EXPORT_SYMBOL(v4l2_ctrl_handler_init_class
);
1446 /* Free all controls and control refs */
1447 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler
*hdl
)
1449 struct v4l2_ctrl_ref
*ref
, *next_ref
;
1450 struct v4l2_ctrl
*ctrl
, *next_ctrl
;
1451 struct v4l2_subscribed_event
*sev
, *next_sev
;
1453 if (hdl
== NULL
|| hdl
->buckets
== NULL
)
1456 mutex_lock(hdl
->lock
);
1457 /* Free all nodes */
1458 list_for_each_entry_safe(ref
, next_ref
, &hdl
->ctrl_refs
, node
) {
1459 list_del(&ref
->node
);
1462 /* Free all controls owned by the handler */
1463 list_for_each_entry_safe(ctrl
, next_ctrl
, &hdl
->ctrls
, node
) {
1464 list_del(&ctrl
->node
);
1465 list_for_each_entry_safe(sev
, next_sev
, &ctrl
->ev_subs
, node
)
1466 list_del(&sev
->node
);
1469 kfree(hdl
->buckets
);
1470 hdl
->buckets
= NULL
;
1473 mutex_unlock(hdl
->lock
);
1475 EXPORT_SYMBOL(v4l2_ctrl_handler_free
);
1477 /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1478 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1479 with applications that do not use the NEXT_CTRL flag.
1481 We just find the n-th private user control. It's O(N), but that should not
1482 be an issue in this particular case. */
1483 static struct v4l2_ctrl_ref
*find_private_ref(
1484 struct v4l2_ctrl_handler
*hdl
, u32 id
)
1486 struct v4l2_ctrl_ref
*ref
;
1488 id
-= V4L2_CID_PRIVATE_BASE
;
1489 list_for_each_entry(ref
, &hdl
->ctrl_refs
, node
) {
1490 /* Search for private user controls that are compatible with
1492 if (V4L2_CTRL_ID2CLASS(ref
->ctrl
->id
) == V4L2_CTRL_CLASS_USER
&&
1493 V4L2_CTRL_DRIVER_PRIV(ref
->ctrl
->id
)) {
1494 if (!type_is_int(ref
->ctrl
))
1504 /* Find a control with the given ID. */
1505 static struct v4l2_ctrl_ref
*find_ref(struct v4l2_ctrl_handler
*hdl
, u32 id
)
1507 struct v4l2_ctrl_ref
*ref
;
1510 id
&= V4L2_CTRL_ID_MASK
;
1512 /* Old-style private controls need special handling */
1513 if (id
>= V4L2_CID_PRIVATE_BASE
)
1514 return find_private_ref(hdl
, id
);
1515 bucket
= id
% hdl
->nr_of_buckets
;
1517 /* Simple optimization: cache the last control found */
1518 if (hdl
->cached
&& hdl
->cached
->ctrl
->id
== id
)
1521 /* Not in cache, search the hash */
1522 ref
= hdl
->buckets
? hdl
->buckets
[bucket
] : NULL
;
1523 while (ref
&& ref
->ctrl
->id
!= id
)
1527 hdl
->cached
= ref
; /* cache it! */
1531 /* Find a control with the given ID. Take the handler's lock first. */
1532 static struct v4l2_ctrl_ref
*find_ref_lock(
1533 struct v4l2_ctrl_handler
*hdl
, u32 id
)
1535 struct v4l2_ctrl_ref
*ref
= NULL
;
1538 mutex_lock(hdl
->lock
);
1539 ref
= find_ref(hdl
, id
);
1540 mutex_unlock(hdl
->lock
);
1545 /* Find a control with the given ID. */
1546 struct v4l2_ctrl
*v4l2_ctrl_find(struct v4l2_ctrl_handler
*hdl
, u32 id
)
1548 struct v4l2_ctrl_ref
*ref
= find_ref_lock(hdl
, id
);
1550 return ref
? ref
->ctrl
: NULL
;
1552 EXPORT_SYMBOL(v4l2_ctrl_find
);
1554 /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1555 static int handler_new_ref(struct v4l2_ctrl_handler
*hdl
,
1556 struct v4l2_ctrl
*ctrl
)
1558 struct v4l2_ctrl_ref
*ref
;
1559 struct v4l2_ctrl_ref
*new_ref
;
1561 u32 class_ctrl
= V4L2_CTRL_ID2CLASS(id
) | 1;
1562 int bucket
= id
% hdl
->nr_of_buckets
; /* which bucket to use */
1564 /* Automatically add the control class if it is not yet present. */
1565 if (id
!= class_ctrl
&& find_ref_lock(hdl
, class_ctrl
) == NULL
)
1566 if (!v4l2_ctrl_new_std(hdl
, NULL
, class_ctrl
, 0, 0, 0, 0))
1572 new_ref
= kzalloc(sizeof(*new_ref
), GFP_KERNEL
);
1574 return handler_set_err(hdl
, -ENOMEM
);
1575 new_ref
->ctrl
= ctrl
;
1576 if (ctrl
->handler
== hdl
) {
1577 /* By default each control starts in a cluster of its own.
1578 new_ref->ctrl is basically a cluster array with one
1579 element, so that's perfect to use as the cluster pointer.
1580 But only do this for the handler that owns the control. */
1581 ctrl
->cluster
= &new_ref
->ctrl
;
1582 ctrl
->ncontrols
= 1;
1585 INIT_LIST_HEAD(&new_ref
->node
);
1587 mutex_lock(hdl
->lock
);
1589 /* Add immediately at the end of the list if the list is empty, or if
1590 the last element in the list has a lower ID.
1591 This ensures that when elements are added in ascending order the
1592 insertion is an O(1) operation. */
1593 if (list_empty(&hdl
->ctrl_refs
) || id
> node2id(hdl
->ctrl_refs
.prev
)) {
1594 list_add_tail(&new_ref
->node
, &hdl
->ctrl_refs
);
1595 goto insert_in_hash
;
1598 /* Find insert position in sorted list */
1599 list_for_each_entry(ref
, &hdl
->ctrl_refs
, node
) {
1600 if (ref
->ctrl
->id
< id
)
1602 /* Don't add duplicates */
1603 if (ref
->ctrl
->id
== id
) {
1607 list_add(&new_ref
->node
, ref
->node
.prev
);
1612 /* Insert the control node in the hash */
1613 new_ref
->next
= hdl
->buckets
[bucket
];
1614 hdl
->buckets
[bucket
] = new_ref
;
1617 mutex_unlock(hdl
->lock
);
1621 /* Add a new control */
1622 static struct v4l2_ctrl
*v4l2_ctrl_new(struct v4l2_ctrl_handler
*hdl
,
1623 const struct v4l2_ctrl_ops
*ops
,
1624 u32 id
, const char *name
, enum v4l2_ctrl_type type
,
1625 s32 min
, s32 max
, u32 step
, s32 def
,
1626 u32 flags
, const char * const *qmenu
,
1627 const s64
*qmenu_int
, void *priv
)
1629 struct v4l2_ctrl
*ctrl
;
1630 unsigned sz_extra
= 0;
1637 if (id
== 0 || name
== NULL
|| id
>= V4L2_CID_PRIVATE_BASE
||
1638 (type
== V4L2_CTRL_TYPE_MENU
&& qmenu
== NULL
) ||
1639 (type
== V4L2_CTRL_TYPE_INTEGER_MENU
&& qmenu_int
== NULL
)) {
1640 handler_set_err(hdl
, -ERANGE
);
1643 err
= check_range(type
, min
, max
, step
, def
);
1645 handler_set_err(hdl
, err
);
1648 if (type
== V4L2_CTRL_TYPE_BITMASK
&& ((def
& ~max
) || min
|| step
)) {
1649 handler_set_err(hdl
, -ERANGE
);
1653 if (type
== V4L2_CTRL_TYPE_BUTTON
)
1654 flags
|= V4L2_CTRL_FLAG_WRITE_ONLY
;
1655 else if (type
== V4L2_CTRL_TYPE_CTRL_CLASS
)
1656 flags
|= V4L2_CTRL_FLAG_READ_ONLY
;
1657 else if (type
== V4L2_CTRL_TYPE_STRING
)
1658 sz_extra
+= 2 * (max
+ 1);
1660 ctrl
= kzalloc(sizeof(*ctrl
) + sz_extra
, GFP_KERNEL
);
1662 handler_set_err(hdl
, -ENOMEM
);
1666 INIT_LIST_HEAD(&ctrl
->node
);
1667 INIT_LIST_HEAD(&ctrl
->ev_subs
);
1668 ctrl
->handler
= hdl
;
1673 ctrl
->flags
= flags
;
1674 ctrl
->minimum
= min
;
1675 ctrl
->maximum
= max
;
1677 if (type
== V4L2_CTRL_TYPE_MENU
)
1678 ctrl
->qmenu
= qmenu
;
1679 else if (type
== V4L2_CTRL_TYPE_INTEGER_MENU
)
1680 ctrl
->qmenu_int
= qmenu_int
;
1682 ctrl
->cur
.val
= ctrl
->val
= ctrl
->default_value
= def
;
1684 if (ctrl
->type
== V4L2_CTRL_TYPE_STRING
) {
1685 ctrl
->cur
.string
= (char *)&ctrl
[1] + sz_extra
- (max
+ 1);
1686 ctrl
->string
= (char *)&ctrl
[1] + sz_extra
- 2 * (max
+ 1);
1688 memset(ctrl
->cur
.string
, ' ', ctrl
->minimum
);
1690 if (handler_new_ref(hdl
, ctrl
)) {
1694 mutex_lock(hdl
->lock
);
1695 list_add_tail(&ctrl
->node
, &hdl
->ctrls
);
1696 mutex_unlock(hdl
->lock
);
1700 struct v4l2_ctrl
*v4l2_ctrl_new_custom(struct v4l2_ctrl_handler
*hdl
,
1701 const struct v4l2_ctrl_config
*cfg
, void *priv
)
1704 struct v4l2_ctrl
*ctrl
;
1705 const char *name
= cfg
->name
;
1706 const char * const *qmenu
= cfg
->qmenu
;
1707 const s64
*qmenu_int
= cfg
->qmenu_int
;
1708 enum v4l2_ctrl_type type
= cfg
->type
;
1709 u32 flags
= cfg
->flags
;
1712 u32 step
= cfg
->step
;
1716 v4l2_ctrl_fill(cfg
->id
, &name
, &type
, &min
, &max
, &step
,
1719 is_menu
= (cfg
->type
== V4L2_CTRL_TYPE_MENU
||
1720 cfg
->type
== V4L2_CTRL_TYPE_INTEGER_MENU
);
1724 WARN_ON(cfg
->menu_skip_mask
);
1725 if (cfg
->type
== V4L2_CTRL_TYPE_MENU
&& qmenu
== NULL
)
1726 qmenu
= v4l2_ctrl_get_menu(cfg
->id
);
1727 else if (cfg
->type
== V4L2_CTRL_TYPE_INTEGER_MENU
&&
1728 qmenu_int
== NULL
) {
1729 handler_set_err(hdl
, -EINVAL
);
1733 ctrl
= v4l2_ctrl_new(hdl
, cfg
->ops
, cfg
->id
, name
,
1735 is_menu
? cfg
->menu_skip_mask
: step
,
1736 def
, flags
, qmenu
, qmenu_int
, priv
);
1738 ctrl
->is_private
= cfg
->is_private
;
1741 EXPORT_SYMBOL(v4l2_ctrl_new_custom
);
1743 /* Helper function for standard non-menu controls */
1744 struct v4l2_ctrl
*v4l2_ctrl_new_std(struct v4l2_ctrl_handler
*hdl
,
1745 const struct v4l2_ctrl_ops
*ops
,
1746 u32 id
, s32 min
, s32 max
, u32 step
, s32 def
)
1749 enum v4l2_ctrl_type type
;
1752 v4l2_ctrl_fill(id
, &name
, &type
, &min
, &max
, &step
, &def
, &flags
);
1753 if (type
== V4L2_CTRL_TYPE_MENU
1754 || type
== V4L2_CTRL_TYPE_INTEGER_MENU
) {
1755 handler_set_err(hdl
, -EINVAL
);
1758 return v4l2_ctrl_new(hdl
, ops
, id
, name
, type
,
1759 min
, max
, step
, def
, flags
, NULL
, NULL
, NULL
);
1761 EXPORT_SYMBOL(v4l2_ctrl_new_std
);
1763 /* Helper function for standard menu controls */
1764 struct v4l2_ctrl
*v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler
*hdl
,
1765 const struct v4l2_ctrl_ops
*ops
,
1766 u32 id
, s32 max
, s32 mask
, s32 def
)
1768 const char * const *qmenu
= NULL
;
1769 const s64
*qmenu_int
= NULL
;
1770 unsigned int qmenu_int_len
= 0;
1772 enum v4l2_ctrl_type type
;
1777 v4l2_ctrl_fill(id
, &name
, &type
, &min
, &max
, &step
, &def
, &flags
);
1779 if (type
== V4L2_CTRL_TYPE_MENU
)
1780 qmenu
= v4l2_ctrl_get_menu(id
);
1781 else if (type
== V4L2_CTRL_TYPE_INTEGER_MENU
)
1782 qmenu_int
= v4l2_ctrl_get_int_menu(id
, &qmenu_int_len
);
1784 if ((!qmenu
&& !qmenu_int
) || (qmenu_int
&& max
> qmenu_int_len
)) {
1785 handler_set_err(hdl
, -EINVAL
);
1788 return v4l2_ctrl_new(hdl
, ops
, id
, name
, type
,
1789 0, max
, mask
, def
, flags
, qmenu
, qmenu_int
, NULL
);
1791 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu
);
1793 /* Helper function for standard menu controls with driver defined menu */
1794 struct v4l2_ctrl
*v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler
*hdl
,
1795 const struct v4l2_ctrl_ops
*ops
, u32 id
, s32 max
,
1796 s32 mask
, s32 def
, const char * const *qmenu
)
1798 enum v4l2_ctrl_type type
;
1804 /* v4l2_ctrl_new_std_menu_items() should only be called for
1805 * standard controls without a standard menu.
1807 if (v4l2_ctrl_get_menu(id
)) {
1808 handler_set_err(hdl
, -EINVAL
);
1812 v4l2_ctrl_fill(id
, &name
, &type
, &min
, &max
, &step
, &def
, &flags
);
1813 if (type
!= V4L2_CTRL_TYPE_MENU
|| qmenu
== NULL
) {
1814 handler_set_err(hdl
, -EINVAL
);
1817 return v4l2_ctrl_new(hdl
, ops
, id
, name
, type
, 0, max
, mask
, def
,
1818 flags
, qmenu
, NULL
, NULL
);
1821 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items
);
1823 /* Helper function for standard integer menu controls */
1824 struct v4l2_ctrl
*v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler
*hdl
,
1825 const struct v4l2_ctrl_ops
*ops
,
1826 u32 id
, s32 max
, s32 def
, const s64
*qmenu_int
)
1829 enum v4l2_ctrl_type type
;
1834 v4l2_ctrl_fill(id
, &name
, &type
, &min
, &max
, &step
, &def
, &flags
);
1835 if (type
!= V4L2_CTRL_TYPE_INTEGER_MENU
) {
1836 handler_set_err(hdl
, -EINVAL
);
1839 return v4l2_ctrl_new(hdl
, ops
, id
, name
, type
,
1840 0, max
, 0, def
, flags
, NULL
, qmenu_int
, NULL
);
1842 EXPORT_SYMBOL(v4l2_ctrl_new_int_menu
);
1844 /* Add a control from another handler to this handler */
1845 struct v4l2_ctrl
*v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler
*hdl
,
1846 struct v4l2_ctrl
*ctrl
)
1848 if (hdl
== NULL
|| hdl
->error
)
1851 handler_set_err(hdl
, -EINVAL
);
1854 if (ctrl
->handler
== hdl
)
1856 return handler_new_ref(hdl
, ctrl
) ? NULL
: ctrl
;
1858 EXPORT_SYMBOL(v4l2_ctrl_add_ctrl
);
1860 /* Add the controls from another handler to our own. */
1861 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler
*hdl
,
1862 struct v4l2_ctrl_handler
*add
,
1863 bool (*filter
)(const struct v4l2_ctrl
*ctrl
))
1865 struct v4l2_ctrl_ref
*ref
;
1868 /* Do nothing if either handler is NULL or if they are the same */
1869 if (!hdl
|| !add
|| hdl
== add
)
1873 mutex_lock(add
->lock
);
1874 list_for_each_entry(ref
, &add
->ctrl_refs
, node
) {
1875 struct v4l2_ctrl
*ctrl
= ref
->ctrl
;
1877 /* Skip handler-private controls. */
1878 if (ctrl
->is_private
)
1880 /* And control classes */
1881 if (ctrl
->type
== V4L2_CTRL_TYPE_CTRL_CLASS
)
1883 /* Filter any unwanted controls */
1884 if (filter
&& !filter(ctrl
))
1886 ret
= handler_new_ref(hdl
, ctrl
);
1890 mutex_unlock(add
->lock
);
1893 EXPORT_SYMBOL(v4l2_ctrl_add_handler
);
1895 bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl
*ctrl
)
1897 if (V4L2_CTRL_ID2CLASS(ctrl
->id
) == V4L2_CTRL_CLASS_FM_TX
)
1899 if (V4L2_CTRL_ID2CLASS(ctrl
->id
) == V4L2_CTRL_CLASS_FM_RX
)
1902 case V4L2_CID_AUDIO_MUTE
:
1903 case V4L2_CID_AUDIO_VOLUME
:
1904 case V4L2_CID_AUDIO_BALANCE
:
1905 case V4L2_CID_AUDIO_BASS
:
1906 case V4L2_CID_AUDIO_TREBLE
:
1907 case V4L2_CID_AUDIO_LOUDNESS
:
1914 EXPORT_SYMBOL(v4l2_ctrl_radio_filter
);
1916 /* Cluster controls */
1917 void v4l2_ctrl_cluster(unsigned ncontrols
, struct v4l2_ctrl
**controls
)
1919 bool has_volatiles
= false;
1922 /* The first control is the master control and it must not be NULL */
1923 BUG_ON(ncontrols
== 0 || controls
[0] == NULL
);
1925 for (i
= 0; i
< ncontrols
; i
++) {
1927 controls
[i
]->cluster
= controls
;
1928 controls
[i
]->ncontrols
= ncontrols
;
1929 if (controls
[i
]->flags
& V4L2_CTRL_FLAG_VOLATILE
)
1930 has_volatiles
= true;
1933 controls
[0]->has_volatiles
= has_volatiles
;
1935 EXPORT_SYMBOL(v4l2_ctrl_cluster
);
1937 void v4l2_ctrl_auto_cluster(unsigned ncontrols
, struct v4l2_ctrl
**controls
,
1938 u8 manual_val
, bool set_volatile
)
1940 struct v4l2_ctrl
*master
= controls
[0];
1944 v4l2_ctrl_cluster(ncontrols
, controls
);
1945 WARN_ON(ncontrols
<= 1);
1946 WARN_ON(manual_val
< master
->minimum
|| manual_val
> master
->maximum
);
1947 WARN_ON(set_volatile
&& !has_op(master
, g_volatile_ctrl
));
1948 master
->is_auto
= true;
1949 master
->has_volatiles
= set_volatile
;
1950 master
->manual_mode_value
= manual_val
;
1951 master
->flags
|= V4L2_CTRL_FLAG_UPDATE
;
1953 if (!is_cur_manual(master
))
1954 flag
= V4L2_CTRL_FLAG_INACTIVE
|
1955 (set_volatile
? V4L2_CTRL_FLAG_VOLATILE
: 0);
1957 for (i
= 1; i
< ncontrols
; i
++)
1959 controls
[i
]->flags
|= flag
;
1961 EXPORT_SYMBOL(v4l2_ctrl_auto_cluster
);
1963 /* Activate/deactivate a control. */
1964 void v4l2_ctrl_activate(struct v4l2_ctrl
*ctrl
, bool active
)
1966 /* invert since the actual flag is called 'inactive' */
1967 bool inactive
= !active
;
1974 /* set V4L2_CTRL_FLAG_INACTIVE */
1975 old
= test_and_set_bit(4, &ctrl
->flags
);
1977 /* clear V4L2_CTRL_FLAG_INACTIVE */
1978 old
= test_and_clear_bit(4, &ctrl
->flags
);
1979 if (old
!= inactive
)
1980 send_event(NULL
, ctrl
, V4L2_EVENT_CTRL_CH_FLAGS
);
1982 EXPORT_SYMBOL(v4l2_ctrl_activate
);
1984 /* Grab/ungrab a control.
1985 Typically used when streaming starts and you want to grab controls,
1986 preventing the user from changing them.
1988 Just call this and the framework will block any attempts to change
1990 void v4l2_ctrl_grab(struct v4l2_ctrl
*ctrl
, bool grabbed
)
1997 v4l2_ctrl_lock(ctrl
);
1999 /* set V4L2_CTRL_FLAG_GRABBED */
2000 old
= test_and_set_bit(1, &ctrl
->flags
);
2002 /* clear V4L2_CTRL_FLAG_GRABBED */
2003 old
= test_and_clear_bit(1, &ctrl
->flags
);
2005 send_event(NULL
, ctrl
, V4L2_EVENT_CTRL_CH_FLAGS
);
2006 v4l2_ctrl_unlock(ctrl
);
2008 EXPORT_SYMBOL(v4l2_ctrl_grab
);
2010 /* Log the control name and value */
2011 static void log_ctrl(const struct v4l2_ctrl
*ctrl
,
2012 const char *prefix
, const char *colon
)
2014 if (ctrl
->flags
& (V4L2_CTRL_FLAG_DISABLED
| V4L2_CTRL_FLAG_WRITE_ONLY
))
2016 if (ctrl
->type
== V4L2_CTRL_TYPE_CTRL_CLASS
)
2019 printk(KERN_INFO
"%s%s%s: ", prefix
, colon
, ctrl
->name
);
2021 switch (ctrl
->type
) {
2022 case V4L2_CTRL_TYPE_INTEGER
:
2023 printk(KERN_CONT
"%d", ctrl
->cur
.val
);
2025 case V4L2_CTRL_TYPE_BOOLEAN
:
2026 printk(KERN_CONT
"%s", ctrl
->cur
.val
? "true" : "false");
2028 case V4L2_CTRL_TYPE_MENU
:
2029 printk(KERN_CONT
"%s", ctrl
->qmenu
[ctrl
->cur
.val
]);
2031 case V4L2_CTRL_TYPE_INTEGER_MENU
:
2032 printk(KERN_CONT
"%lld", ctrl
->qmenu_int
[ctrl
->cur
.val
]);
2034 case V4L2_CTRL_TYPE_BITMASK
:
2035 printk(KERN_CONT
"0x%08x", ctrl
->cur
.val
);
2037 case V4L2_CTRL_TYPE_INTEGER64
:
2038 printk(KERN_CONT
"%lld", ctrl
->cur
.val64
);
2040 case V4L2_CTRL_TYPE_STRING
:
2041 printk(KERN_CONT
"%s", ctrl
->cur
.string
);
2044 printk(KERN_CONT
"unknown type %d", ctrl
->type
);
2047 if (ctrl
->flags
& (V4L2_CTRL_FLAG_INACTIVE
|
2048 V4L2_CTRL_FLAG_GRABBED
|
2049 V4L2_CTRL_FLAG_VOLATILE
)) {
2050 if (ctrl
->flags
& V4L2_CTRL_FLAG_INACTIVE
)
2051 printk(KERN_CONT
" inactive");
2052 if (ctrl
->flags
& V4L2_CTRL_FLAG_GRABBED
)
2053 printk(KERN_CONT
" grabbed");
2054 if (ctrl
->flags
& V4L2_CTRL_FLAG_VOLATILE
)
2055 printk(KERN_CONT
" volatile");
2057 printk(KERN_CONT
"\n");
2060 /* Log all controls owned by the handler */
2061 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler
*hdl
,
2064 struct v4l2_ctrl
*ctrl
;
2065 const char *colon
= "";
2072 len
= strlen(prefix
);
2073 if (len
&& prefix
[len
- 1] != ' ')
2075 mutex_lock(hdl
->lock
);
2076 list_for_each_entry(ctrl
, &hdl
->ctrls
, node
)
2077 if (!(ctrl
->flags
& V4L2_CTRL_FLAG_DISABLED
))
2078 log_ctrl(ctrl
, prefix
, colon
);
2079 mutex_unlock(hdl
->lock
);
2081 EXPORT_SYMBOL(v4l2_ctrl_handler_log_status
);
2083 int v4l2_ctrl_subdev_log_status(struct v4l2_subdev
*sd
)
2085 v4l2_ctrl_handler_log_status(sd
->ctrl_handler
, sd
->name
);
2088 EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status
);
2090 /* Call s_ctrl for all controls owned by the handler */
2091 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler
*hdl
)
2093 struct v4l2_ctrl
*ctrl
;
2098 mutex_lock(hdl
->lock
);
2099 list_for_each_entry(ctrl
, &hdl
->ctrls
, node
)
2102 list_for_each_entry(ctrl
, &hdl
->ctrls
, node
) {
2103 struct v4l2_ctrl
*master
= ctrl
->cluster
[0];
2106 /* Skip if this control was already handled by a cluster. */
2107 /* Skip button controls and read-only controls. */
2108 if (ctrl
->done
|| ctrl
->type
== V4L2_CTRL_TYPE_BUTTON
||
2109 (ctrl
->flags
& V4L2_CTRL_FLAG_READ_ONLY
))
2112 for (i
= 0; i
< master
->ncontrols
; i
++) {
2113 if (master
->cluster
[i
]) {
2114 cur_to_new(master
->cluster
[i
]);
2115 master
->cluster
[i
]->is_new
= 1;
2116 master
->cluster
[i
]->done
= true;
2119 ret
= call_op(master
, s_ctrl
);
2123 mutex_unlock(hdl
->lock
);
2126 EXPORT_SYMBOL(v4l2_ctrl_handler_setup
);
2128 /* Implement VIDIOC_QUERYCTRL */
2129 int v4l2_queryctrl(struct v4l2_ctrl_handler
*hdl
, struct v4l2_queryctrl
*qc
)
2131 u32 id
= qc
->id
& V4L2_CTRL_ID_MASK
;
2132 struct v4l2_ctrl_ref
*ref
;
2133 struct v4l2_ctrl
*ctrl
;
2138 mutex_lock(hdl
->lock
);
2140 /* Try to find it */
2141 ref
= find_ref(hdl
, id
);
2143 if ((qc
->id
& V4L2_CTRL_FLAG_NEXT_CTRL
) && !list_empty(&hdl
->ctrl_refs
)) {
2144 /* Find the next control with ID > qc->id */
2146 /* Did we reach the end of the control list? */
2147 if (id
>= node2id(hdl
->ctrl_refs
.prev
)) {
2148 ref
= NULL
; /* Yes, so there is no next control */
2150 /* We found a control with the given ID, so just get
2151 the next one in the list. */
2152 ref
= list_entry(ref
->node
.next
, typeof(*ref
), node
);
2154 /* No control with the given ID exists, so start
2155 searching for the next largest ID. We know there
2156 is one, otherwise the first 'if' above would have
2158 list_for_each_entry(ref
, &hdl
->ctrl_refs
, node
)
2159 if (id
< ref
->ctrl
->id
)
2163 mutex_unlock(hdl
->lock
);
2168 memset(qc
, 0, sizeof(*qc
));
2169 if (id
>= V4L2_CID_PRIVATE_BASE
)
2173 strlcpy(qc
->name
, ctrl
->name
, sizeof(qc
->name
));
2174 qc
->minimum
= ctrl
->minimum
;
2175 qc
->maximum
= ctrl
->maximum
;
2176 qc
->default_value
= ctrl
->default_value
;
2177 if (ctrl
->type
== V4L2_CTRL_TYPE_MENU
2178 || ctrl
->type
== V4L2_CTRL_TYPE_INTEGER_MENU
)
2181 qc
->step
= ctrl
->step
;
2182 qc
->flags
= ctrl
->flags
;
2183 qc
->type
= ctrl
->type
;
2186 EXPORT_SYMBOL(v4l2_queryctrl
);
2188 int v4l2_subdev_queryctrl(struct v4l2_subdev
*sd
, struct v4l2_queryctrl
*qc
)
2190 if (qc
->id
& V4L2_CTRL_FLAG_NEXT_CTRL
)
2192 return v4l2_queryctrl(sd
->ctrl_handler
, qc
);
2194 EXPORT_SYMBOL(v4l2_subdev_queryctrl
);
2196 /* Implement VIDIOC_QUERYMENU */
2197 int v4l2_querymenu(struct v4l2_ctrl_handler
*hdl
, struct v4l2_querymenu
*qm
)
2199 struct v4l2_ctrl
*ctrl
;
2202 ctrl
= v4l2_ctrl_find(hdl
, qm
->id
);
2208 switch (ctrl
->type
) {
2209 case V4L2_CTRL_TYPE_MENU
:
2210 if (ctrl
->qmenu
== NULL
)
2213 case V4L2_CTRL_TYPE_INTEGER_MENU
:
2214 if (ctrl
->qmenu_int
== NULL
)
2221 if (i
< ctrl
->minimum
|| i
> ctrl
->maximum
)
2224 /* Use mask to see if this menu item should be skipped */
2225 if (ctrl
->menu_skip_mask
& (1 << i
))
2227 /* Empty menu items should also be skipped */
2228 if (ctrl
->type
== V4L2_CTRL_TYPE_MENU
) {
2229 if (ctrl
->qmenu
[i
] == NULL
|| ctrl
->qmenu
[i
][0] == '\0')
2231 strlcpy(qm
->name
, ctrl
->qmenu
[i
], sizeof(qm
->name
));
2233 qm
->value
= ctrl
->qmenu_int
[i
];
2237 EXPORT_SYMBOL(v4l2_querymenu
);
2239 int v4l2_subdev_querymenu(struct v4l2_subdev
*sd
, struct v4l2_querymenu
*qm
)
2241 return v4l2_querymenu(sd
->ctrl_handler
, qm
);
2243 EXPORT_SYMBOL(v4l2_subdev_querymenu
);
2247 /* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2249 It is not a fully atomic operation, just best-effort only. After all, if
2250 multiple controls have to be set through multiple i2c writes (for example)
2251 then some initial writes may succeed while others fail. Thus leaving the
2252 system in an inconsistent state. The question is how much effort you are
2253 willing to spend on trying to make something atomic that really isn't.
2255 From the point of view of an application the main requirement is that
2256 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2257 error should be returned without actually affecting any controls.
2259 If all the values are correct, then it is acceptable to just give up
2260 in case of low-level errors.
2262 It is important though that the application can tell when only a partial
2263 configuration was done. The way we do that is through the error_idx field
2264 of struct v4l2_ext_controls: if that is equal to the count field then no
2265 controls were affected. Otherwise all controls before that index were
2266 successful in performing their 'get' or 'set' operation, the control at
2267 the given index failed, and you don't know what happened with the controls
2268 after the failed one. Since if they were part of a control cluster they
2269 could have been successfully processed (if a cluster member was encountered
2270 at index < error_idx), they could have failed (if a cluster member was at
2271 error_idx), or they may not have been processed yet (if the first cluster
2272 member appeared after error_idx).
2274 It is all fairly theoretical, though. In practice all you can do is to
2275 bail out. If error_idx == count, then it is an application bug. If
2276 error_idx < count then it is only an application bug if the error code was
2277 EBUSY. That usually means that something started streaming just when you
2278 tried to set the controls. In all other cases it is a driver/hardware
2279 problem and all you can do is to retry or bail out.
2281 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2282 never modifies controls the error_idx is just set to whatever control
2283 has an invalid value.
2286 /* Prepare for the extended g/s/try functions.
2287 Find the controls in the control array and do some basic checks. */
2288 static int prepare_ext_ctrls(struct v4l2_ctrl_handler
*hdl
,
2289 struct v4l2_ext_controls
*cs
,
2290 struct v4l2_ctrl_helper
*helpers
)
2292 struct v4l2_ctrl_helper
*h
;
2293 bool have_clusters
= false;
2296 for (i
= 0, h
= helpers
; i
< cs
->count
; i
++, h
++) {
2297 struct v4l2_ext_control
*c
= &cs
->controls
[i
];
2298 struct v4l2_ctrl_ref
*ref
;
2299 struct v4l2_ctrl
*ctrl
;
2300 u32 id
= c
->id
& V4L2_CTRL_ID_MASK
;
2304 if (cs
->ctrl_class
&& V4L2_CTRL_ID2CLASS(id
) != cs
->ctrl_class
)
2307 /* Old-style private controls are not allowed for
2308 extended controls */
2309 if (id
>= V4L2_CID_PRIVATE_BASE
)
2311 ref
= find_ref_lock(hdl
, id
);
2315 if (ctrl
->flags
& V4L2_CTRL_FLAG_DISABLED
)
2318 if (ctrl
->cluster
[0]->ncontrols
> 1)
2319 have_clusters
= true;
2320 if (ctrl
->cluster
[0] != ctrl
)
2321 ref
= find_ref_lock(hdl
, ctrl
->cluster
[0]->id
);
2322 /* Store the ref to the master control of the cluster */
2325 /* Initially set next to 0, meaning that there is no other
2326 control in this helper array belonging to the same
2331 /* We are done if there were no controls that belong to a multi-
2336 /* The code below figures out in O(n) time which controls in the list
2337 belong to the same cluster. */
2339 /* This has to be done with the handler lock taken. */
2340 mutex_lock(hdl
->lock
);
2342 /* First zero the helper field in the master control references */
2343 for (i
= 0; i
< cs
->count
; i
++)
2344 helpers
[i
].mref
->helper
= NULL
;
2345 for (i
= 0, h
= helpers
; i
< cs
->count
; i
++, h
++) {
2346 struct v4l2_ctrl_ref
*mref
= h
->mref
;
2348 /* If the mref->helper is set, then it points to an earlier
2349 helper that belongs to the same cluster. */
2351 /* Set the next field of mref->helper to the current
2352 index: this means that that earlier helper now
2353 points to the next helper in the same cluster. */
2354 mref
->helper
->next
= i
;
2355 /* mref should be set only for the first helper in the
2356 cluster, clear the others. */
2359 /* Point the mref helper to the current helper struct. */
2362 mutex_unlock(hdl
->lock
);
2366 /* Handles the corner case where cs->count == 0. It checks whether the
2367 specified control class exists. If that class ID is 0, then it checks
2368 whether there are any controls at all. */
2369 static int class_check(struct v4l2_ctrl_handler
*hdl
, u32 ctrl_class
)
2371 if (ctrl_class
== 0)
2372 return list_empty(&hdl
->ctrl_refs
) ? -EINVAL
: 0;
2373 return find_ref_lock(hdl
, ctrl_class
| 1) ? 0 : -EINVAL
;
2378 /* Get extended controls. Allocates the helpers array if needed. */
2379 int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler
*hdl
, struct v4l2_ext_controls
*cs
)
2381 struct v4l2_ctrl_helper helper
[4];
2382 struct v4l2_ctrl_helper
*helpers
= helper
;
2386 cs
->error_idx
= cs
->count
;
2387 cs
->ctrl_class
= V4L2_CTRL_ID2CLASS(cs
->ctrl_class
);
2393 return class_check(hdl
, cs
->ctrl_class
);
2395 if (cs
->count
> ARRAY_SIZE(helper
)) {
2396 helpers
= kmalloc_array(cs
->count
, sizeof(helper
[0]),
2398 if (helpers
== NULL
)
2402 ret
= prepare_ext_ctrls(hdl
, cs
, helpers
);
2403 cs
->error_idx
= cs
->count
;
2405 for (i
= 0; !ret
&& i
< cs
->count
; i
++)
2406 if (helpers
[i
].ctrl
->flags
& V4L2_CTRL_FLAG_WRITE_ONLY
)
2409 for (i
= 0; !ret
&& i
< cs
->count
; i
++) {
2410 int (*ctrl_to_user
)(struct v4l2_ext_control
*c
,
2411 struct v4l2_ctrl
*ctrl
) = cur_to_user
;
2412 struct v4l2_ctrl
*master
;
2414 if (helpers
[i
].mref
== NULL
)
2417 master
= helpers
[i
].mref
->ctrl
;
2420 v4l2_ctrl_lock(master
);
2422 /* g_volatile_ctrl will update the new control values */
2423 if ((master
->flags
& V4L2_CTRL_FLAG_VOLATILE
) ||
2424 (master
->has_volatiles
&& !is_cur_manual(master
))) {
2425 for (j
= 0; j
< master
->ncontrols
; j
++)
2426 cur_to_new(master
->cluster
[j
]);
2427 ret
= call_op(master
, g_volatile_ctrl
);
2428 ctrl_to_user
= new_to_user
;
2430 /* If OK, then copy the current (for non-volatile controls)
2431 or the new (for volatile controls) control values to the
2437 ret
= ctrl_to_user(cs
->controls
+ idx
,
2439 idx
= helpers
[idx
].next
;
2440 } while (!ret
&& idx
);
2442 v4l2_ctrl_unlock(master
);
2445 if (cs
->count
> ARRAY_SIZE(helper
))
2449 EXPORT_SYMBOL(v4l2_g_ext_ctrls
);
2451 int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev
*sd
, struct v4l2_ext_controls
*cs
)
2453 return v4l2_g_ext_ctrls(sd
->ctrl_handler
, cs
);
2455 EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls
);
2457 /* Helper function to get a single control */
2458 static int get_ctrl(struct v4l2_ctrl
*ctrl
, struct v4l2_ext_control
*c
)
2460 struct v4l2_ctrl
*master
= ctrl
->cluster
[0];
2464 /* String controls are not supported. The new_to_user() and
2465 * cur_to_user() calls below would need to be modified not to access
2466 * userspace memory when called from get_ctrl().
2468 if (ctrl
->type
== V4L2_CTRL_TYPE_STRING
)
2471 if (ctrl
->flags
& V4L2_CTRL_FLAG_WRITE_ONLY
)
2474 v4l2_ctrl_lock(master
);
2475 /* g_volatile_ctrl will update the current control values */
2476 if (ctrl
->flags
& V4L2_CTRL_FLAG_VOLATILE
) {
2477 for (i
= 0; i
< master
->ncontrols
; i
++)
2478 cur_to_new(master
->cluster
[i
]);
2479 ret
= call_op(master
, g_volatile_ctrl
);
2480 new_to_user(c
, ctrl
);
2482 cur_to_user(c
, ctrl
);
2484 v4l2_ctrl_unlock(master
);
2488 int v4l2_g_ctrl(struct v4l2_ctrl_handler
*hdl
, struct v4l2_control
*control
)
2490 struct v4l2_ctrl
*ctrl
= v4l2_ctrl_find(hdl
, control
->id
);
2491 struct v4l2_ext_control c
;
2494 if (ctrl
== NULL
|| !type_is_int(ctrl
))
2496 ret
= get_ctrl(ctrl
, &c
);
2497 control
->value
= c
.value
;
2500 EXPORT_SYMBOL(v4l2_g_ctrl
);
2502 int v4l2_subdev_g_ctrl(struct v4l2_subdev
*sd
, struct v4l2_control
*control
)
2504 return v4l2_g_ctrl(sd
->ctrl_handler
, control
);
2506 EXPORT_SYMBOL(v4l2_subdev_g_ctrl
);
2508 s32
v4l2_ctrl_g_ctrl(struct v4l2_ctrl
*ctrl
)
2510 struct v4l2_ext_control c
;
2512 /* It's a driver bug if this happens. */
2513 WARN_ON(!type_is_int(ctrl
));
2518 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl
);
2520 s64
v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl
*ctrl
)
2522 struct v4l2_ext_control c
;
2524 /* It's a driver bug if this happens. */
2525 WARN_ON(ctrl
->type
!= V4L2_CTRL_TYPE_INTEGER64
);
2530 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64
);
2533 /* Core function that calls try/s_ctrl and ensures that the new value is
2534 copied to the current value on a set.
2535 Must be called with ctrl->handler->lock held. */
2536 static int try_or_set_cluster(struct v4l2_fh
*fh
, struct v4l2_ctrl
*master
,
2537 bool set
, u32 ch_flags
)
2543 /* Go through the cluster and either validate the new value or
2544 (if no new value was set), copy the current value to the new
2545 value, ensuring a consistent view for the control ops when
2547 for (i
= 0; i
< master
->ncontrols
; i
++) {
2548 struct v4l2_ctrl
*ctrl
= master
->cluster
[i
];
2553 if (!ctrl
->is_new
) {
2557 /* Check again: it may have changed since the
2558 previous check in try_or_set_ext_ctrls(). */
2559 if (set
&& (ctrl
->flags
& V4L2_CTRL_FLAG_GRABBED
))
2563 ret
= call_op(master
, try_ctrl
);
2565 /* Don't set if there is no change */
2566 if (ret
|| !set
|| !cluster_changed(master
))
2568 ret
= call_op(master
, s_ctrl
);
2572 /* If OK, then make the new values permanent. */
2573 update_flag
= is_cur_manual(master
) != is_new_manual(master
);
2574 for (i
= 0; i
< master
->ncontrols
; i
++)
2575 new_to_cur(fh
, master
->cluster
[i
], ch_flags
|
2576 ((update_flag
&& i
> 0) ? V4L2_EVENT_CTRL_CH_FLAGS
: 0));
2580 /* Validate controls. */
2581 static int validate_ctrls(struct v4l2_ext_controls
*cs
,
2582 struct v4l2_ctrl_helper
*helpers
, bool set
)
2587 cs
->error_idx
= cs
->count
;
2588 for (i
= 0; i
< cs
->count
; i
++) {
2589 struct v4l2_ctrl
*ctrl
= helpers
[i
].ctrl
;
2593 if (ctrl
->flags
& V4L2_CTRL_FLAG_READ_ONLY
)
2595 /* This test is also done in try_set_control_cluster() which
2596 is called in atomic context, so that has the final say,
2597 but it makes sense to do an up-front check as well. Once
2598 an error occurs in try_set_control_cluster() some other
2599 controls may have been set already and we want to do a
2600 best-effort to avoid that. */
2601 if (set
&& (ctrl
->flags
& V4L2_CTRL_FLAG_GRABBED
))
2603 ret
= validate_new(ctrl
, &cs
->controls
[i
]);
2610 /* Obtain the current volatile values of an autocluster and mark them
2612 static void update_from_auto_cluster(struct v4l2_ctrl
*master
)
2616 for (i
= 0; i
< master
->ncontrols
; i
++)
2617 cur_to_new(master
->cluster
[i
]);
2618 if (!call_op(master
, g_volatile_ctrl
))
2619 for (i
= 1; i
< master
->ncontrols
; i
++)
2620 if (master
->cluster
[i
])
2621 master
->cluster
[i
]->is_new
= 1;
2624 /* Try or try-and-set controls */
2625 static int try_set_ext_ctrls(struct v4l2_fh
*fh
, struct v4l2_ctrl_handler
*hdl
,
2626 struct v4l2_ext_controls
*cs
,
2629 struct v4l2_ctrl_helper helper
[4];
2630 struct v4l2_ctrl_helper
*helpers
= helper
;
2634 cs
->error_idx
= cs
->count
;
2635 cs
->ctrl_class
= V4L2_CTRL_ID2CLASS(cs
->ctrl_class
);
2641 return class_check(hdl
, cs
->ctrl_class
);
2643 if (cs
->count
> ARRAY_SIZE(helper
)) {
2644 helpers
= kmalloc_array(cs
->count
, sizeof(helper
[0]),
2649 ret
= prepare_ext_ctrls(hdl
, cs
, helpers
);
2651 ret
= validate_ctrls(cs
, helpers
, set
);
2653 cs
->error_idx
= cs
->count
;
2654 for (i
= 0; !ret
&& i
< cs
->count
; i
++) {
2655 struct v4l2_ctrl
*master
;
2658 if (helpers
[i
].mref
== NULL
)
2662 master
= helpers
[i
].mref
->ctrl
;
2663 v4l2_ctrl_lock(master
);
2665 /* Reset the 'is_new' flags of the cluster */
2666 for (j
= 0; j
< master
->ncontrols
; j
++)
2667 if (master
->cluster
[j
])
2668 master
->cluster
[j
]->is_new
= 0;
2670 /* For volatile autoclusters that are currently in auto mode
2671 we need to discover if it will be set to manual mode.
2672 If so, then we have to copy the current volatile values
2673 first since those will become the new manual values (which
2674 may be overwritten by explicit new values from this set
2676 if (master
->is_auto
&& master
->has_volatiles
&&
2677 !is_cur_manual(master
)) {
2678 /* Pick an initial non-manual value */
2679 s32 new_auto_val
= master
->manual_mode_value
+ 1;
2683 /* Check if the auto control is part of the
2684 list, and remember the new value. */
2685 if (helpers
[tmp_idx
].ctrl
== master
)
2686 new_auto_val
= cs
->controls
[tmp_idx
].value
;
2687 tmp_idx
= helpers
[tmp_idx
].next
;
2689 /* If the new value == the manual value, then copy
2690 the current volatile values. */
2691 if (new_auto_val
== master
->manual_mode_value
)
2692 update_from_auto_cluster(master
);
2695 /* Copy the new caller-supplied control values.
2696 user_to_new() sets 'is_new' to 1. */
2698 ret
= user_to_new(cs
->controls
+ idx
, helpers
[idx
].ctrl
);
2699 idx
= helpers
[idx
].next
;
2700 } while (!ret
&& idx
);
2703 ret
= try_or_set_cluster(fh
, master
, set
, 0);
2705 /* Copy the new values back to userspace. */
2709 ret
= new_to_user(cs
->controls
+ idx
,
2711 idx
= helpers
[idx
].next
;
2712 } while (!ret
&& idx
);
2714 v4l2_ctrl_unlock(master
);
2717 if (cs
->count
> ARRAY_SIZE(helper
))
2722 int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler
*hdl
, struct v4l2_ext_controls
*cs
)
2724 return try_set_ext_ctrls(NULL
, hdl
, cs
, false);
2726 EXPORT_SYMBOL(v4l2_try_ext_ctrls
);
2728 int v4l2_s_ext_ctrls(struct v4l2_fh
*fh
, struct v4l2_ctrl_handler
*hdl
,
2729 struct v4l2_ext_controls
*cs
)
2731 return try_set_ext_ctrls(fh
, hdl
, cs
, true);
2733 EXPORT_SYMBOL(v4l2_s_ext_ctrls
);
2735 int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev
*sd
, struct v4l2_ext_controls
*cs
)
2737 return try_set_ext_ctrls(NULL
, sd
->ctrl_handler
, cs
, false);
2739 EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls
);
2741 int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev
*sd
, struct v4l2_ext_controls
*cs
)
2743 return try_set_ext_ctrls(NULL
, sd
->ctrl_handler
, cs
, true);
2745 EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls
);
2747 /* Helper function for VIDIOC_S_CTRL compatibility */
2748 static int set_ctrl(struct v4l2_fh
*fh
, struct v4l2_ctrl
*ctrl
,
2749 struct v4l2_ext_control
*c
, u32 ch_flags
)
2751 struct v4l2_ctrl
*master
= ctrl
->cluster
[0];
2754 /* String controls are not supported. The user_to_new() and
2755 * cur_to_user() calls below would need to be modified not to access
2756 * userspace memory when called from set_ctrl().
2758 if (ctrl
->type
== V4L2_CTRL_TYPE_STRING
)
2761 /* Reset the 'is_new' flags of the cluster */
2762 for (i
= 0; i
< master
->ncontrols
; i
++)
2763 if (master
->cluster
[i
])
2764 master
->cluster
[i
]->is_new
= 0;
2766 /* For autoclusters with volatiles that are switched from auto to
2767 manual mode we have to update the current volatile values since
2768 those will become the initial manual values after such a switch. */
2769 if (master
->is_auto
&& master
->has_volatiles
&& ctrl
== master
&&
2770 !is_cur_manual(master
) && c
->value
== master
->manual_mode_value
)
2771 update_from_auto_cluster(master
);
2773 user_to_new(c
, ctrl
);
2774 return try_or_set_cluster(fh
, master
, true, ch_flags
);
2777 /* Helper function for VIDIOC_S_CTRL compatibility */
2778 static int set_ctrl_lock(struct v4l2_fh
*fh
, struct v4l2_ctrl
*ctrl
,
2779 struct v4l2_ext_control
*c
)
2781 int ret
= validate_new(ctrl
, c
);
2784 v4l2_ctrl_lock(ctrl
);
2785 ret
= set_ctrl(fh
, ctrl
, c
, 0);
2787 cur_to_user(c
, ctrl
);
2788 v4l2_ctrl_unlock(ctrl
);
2793 int v4l2_s_ctrl(struct v4l2_fh
*fh
, struct v4l2_ctrl_handler
*hdl
,
2794 struct v4l2_control
*control
)
2796 struct v4l2_ctrl
*ctrl
= v4l2_ctrl_find(hdl
, control
->id
);
2797 struct v4l2_ext_control c
;
2800 if (ctrl
== NULL
|| !type_is_int(ctrl
))
2803 if (ctrl
->flags
& V4L2_CTRL_FLAG_READ_ONLY
)
2806 c
.value
= control
->value
;
2807 ret
= set_ctrl_lock(fh
, ctrl
, &c
);
2808 control
->value
= c
.value
;
2811 EXPORT_SYMBOL(v4l2_s_ctrl
);
2813 int v4l2_subdev_s_ctrl(struct v4l2_subdev
*sd
, struct v4l2_control
*control
)
2815 return v4l2_s_ctrl(NULL
, sd
->ctrl_handler
, control
);
2817 EXPORT_SYMBOL(v4l2_subdev_s_ctrl
);
2819 int v4l2_ctrl_s_ctrl(struct v4l2_ctrl
*ctrl
, s32 val
)
2821 struct v4l2_ext_control c
;
2823 /* It's a driver bug if this happens. */
2824 WARN_ON(!type_is_int(ctrl
));
2826 return set_ctrl_lock(NULL
, ctrl
, &c
);
2828 EXPORT_SYMBOL(v4l2_ctrl_s_ctrl
);
2830 int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl
*ctrl
, s64 val
)
2832 struct v4l2_ext_control c
;
2834 /* It's a driver bug if this happens. */
2835 WARN_ON(ctrl
->type
!= V4L2_CTRL_TYPE_INTEGER64
);
2837 return set_ctrl_lock(NULL
, ctrl
, &c
);
2839 EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64
);
2841 void v4l2_ctrl_notify(struct v4l2_ctrl
*ctrl
, v4l2_ctrl_notify_fnc notify
, void *priv
)
2845 if (notify
== NULL
) {
2846 ctrl
->call_notify
= 0;
2849 if (WARN_ON(ctrl
->handler
->notify
&& ctrl
->handler
->notify
!= notify
))
2851 ctrl
->handler
->notify
= notify
;
2852 ctrl
->handler
->notify_priv
= priv
;
2853 ctrl
->call_notify
= 1;
2855 EXPORT_SYMBOL(v4l2_ctrl_notify
);
2857 int v4l2_ctrl_modify_range(struct v4l2_ctrl
*ctrl
,
2858 s32 min
, s32 max
, u32 step
, s32 def
)
2860 int ret
= check_range(ctrl
->type
, min
, max
, step
, def
);
2861 struct v4l2_ext_control c
;
2863 switch (ctrl
->type
) {
2864 case V4L2_CTRL_TYPE_INTEGER
:
2865 case V4L2_CTRL_TYPE_BOOLEAN
:
2866 case V4L2_CTRL_TYPE_MENU
:
2867 case V4L2_CTRL_TYPE_INTEGER_MENU
:
2868 case V4L2_CTRL_TYPE_BITMASK
:
2875 v4l2_ctrl_lock(ctrl
);
2876 ctrl
->minimum
= min
;
2877 ctrl
->maximum
= max
;
2879 ctrl
->default_value
= def
;
2880 c
.value
= ctrl
->cur
.val
;
2881 if (validate_new(ctrl
, &c
))
2883 if (c
.value
!= ctrl
->cur
.val
)
2884 ret
= set_ctrl(NULL
, ctrl
, &c
, V4L2_EVENT_CTRL_CH_RANGE
);
2886 send_event(NULL
, ctrl
, V4L2_EVENT_CTRL_CH_RANGE
);
2887 v4l2_ctrl_unlock(ctrl
);
2890 EXPORT_SYMBOL(v4l2_ctrl_modify_range
);
2892 static int v4l2_ctrl_add_event(struct v4l2_subscribed_event
*sev
, unsigned elems
)
2894 struct v4l2_ctrl
*ctrl
= v4l2_ctrl_find(sev
->fh
->ctrl_handler
, sev
->id
);
2899 v4l2_ctrl_lock(ctrl
);
2900 list_add_tail(&sev
->node
, &ctrl
->ev_subs
);
2901 if (ctrl
->type
!= V4L2_CTRL_TYPE_CTRL_CLASS
&&
2902 (sev
->flags
& V4L2_EVENT_SUB_FL_SEND_INITIAL
)) {
2903 struct v4l2_event ev
;
2904 u32 changes
= V4L2_EVENT_CTRL_CH_FLAGS
;
2906 if (!(ctrl
->flags
& V4L2_CTRL_FLAG_WRITE_ONLY
))
2907 changes
|= V4L2_EVENT_CTRL_CH_VALUE
;
2908 fill_event(&ev
, ctrl
, changes
);
2909 /* Mark the queue as active, allowing this initial
2910 event to be accepted. */
2912 v4l2_event_queue_fh(sev
->fh
, &ev
);
2914 v4l2_ctrl_unlock(ctrl
);
2918 static void v4l2_ctrl_del_event(struct v4l2_subscribed_event
*sev
)
2920 struct v4l2_ctrl
*ctrl
= v4l2_ctrl_find(sev
->fh
->ctrl_handler
, sev
->id
);
2922 v4l2_ctrl_lock(ctrl
);
2923 list_del(&sev
->node
);
2924 v4l2_ctrl_unlock(ctrl
);
2927 void v4l2_ctrl_replace(struct v4l2_event
*old
, const struct v4l2_event
*new)
2929 u32 old_changes
= old
->u
.ctrl
.changes
;
2931 old
->u
.ctrl
= new->u
.ctrl
;
2932 old
->u
.ctrl
.changes
|= old_changes
;
2934 EXPORT_SYMBOL(v4l2_ctrl_replace
);
2936 void v4l2_ctrl_merge(const struct v4l2_event
*old
, struct v4l2_event
*new)
2938 new->u
.ctrl
.changes
|= old
->u
.ctrl
.changes
;
2940 EXPORT_SYMBOL(v4l2_ctrl_merge
);
2942 const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops
= {
2943 .add
= v4l2_ctrl_add_event
,
2944 .del
= v4l2_ctrl_del_event
,
2945 .replace
= v4l2_ctrl_replace
,
2946 .merge
= v4l2_ctrl_merge
,
2948 EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops
);
2950 int v4l2_ctrl_log_status(struct file
*file
, void *fh
)
2952 struct video_device
*vfd
= video_devdata(file
);
2953 struct v4l2_fh
*vfh
= file
->private_data
;
2955 if (test_bit(V4L2_FL_USES_V4L2_FH
, &vfd
->flags
) && vfd
->v4l2_dev
)
2956 v4l2_ctrl_handler_log_status(vfh
->ctrl_handler
,
2957 vfd
->v4l2_dev
->name
);
2960 EXPORT_SYMBOL(v4l2_ctrl_log_status
);
2962 int v4l2_ctrl_subscribe_event(struct v4l2_fh
*fh
,
2963 const struct v4l2_event_subscription
*sub
)
2965 if (sub
->type
== V4L2_EVENT_CTRL
)
2966 return v4l2_event_subscribe(fh
, sub
, 0, &v4l2_ctrl_sub_ev_ops
);
2969 EXPORT_SYMBOL(v4l2_ctrl_subscribe_event
);
2971 int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev
*sd
, struct v4l2_fh
*fh
,
2972 struct v4l2_event_subscription
*sub
)
2974 if (!sd
->ctrl_handler
)
2976 return v4l2_ctrl_subscribe_event(fh
, sub
);
2978 EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event
);
2980 unsigned int v4l2_ctrl_poll(struct file
*file
, struct poll_table_struct
*wait
)
2982 struct v4l2_fh
*fh
= file
->private_data
;
2984 if (v4l2_event_pending(fh
))
2986 poll_wait(file
, &fh
->wait
, wait
);
2989 EXPORT_SYMBOL(v4l2_ctrl_poll
);