1 // SPDX-License-Identifier: GPL-2.0-or-later
3 V4L2 controls framework implementation.
5 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
9 #define pr_fmt(fmt) "v4l2-ctrls: " fmt
11 #include <linux/ctype.h>
12 #include <linux/export.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>
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); \
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)
33 static const union v4l2_ctrl_ptr ptr_null;
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 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. */
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[] = {
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",
215 static const char * const mpeg_stream_vbi_fmt[] = {
217 "Private Packet, IVTV Format",
220 static const char * const camera_power_line_frequency[] = {
227 static const char * const camera_exposure_auto[] = {
230 "Shutter Priority Mode",
231 "Aperture Priority Mode",
234 static const char * const camera_exposure_metering[] = {
241 static const char * const camera_auto_focus_range[] = {
248 static const char * const colorfx[] = {
267 static const char * const auto_n_preset_white_balance[] = {
280 static const char * const camera_iso_sensitivity_auto[] = {
285 static const char * const scene_mode[] = {
302 static const char * const tune_emphasis[] = {
308 static const char * const header_mode[] = {
310 "Joined With 1st Frame",
313 static const char * const multi_slice[] = {
319 static const char * const entropy_mode[] = {
324 static const char * const mpeg_h264_level[] = {
347 static const char * const h264_loop_filter[] = {
350 "Disabled at Slice Boundary",
353 static const char * const h264_profile[] = {
355 "Constrained Baseline",
361 "High 444 Predictive",
368 "Scalable High Intra",
374 static const char * const vui_sar_idc[] = {
395 static const char * const h264_fp_arrangement_type[] = {
404 static const char * const h264_fmo_map_type[] = {
405 "Interleaved Slices",
407 "Foreground with Leftover",
414 static const char * const h264_decode_mode[] = {
419 static const char * const h264_start_code[] = {
421 "Annex B Start Code",
424 static const char * const h264_hierarchical_coding_type[] = {
429 static const char * const mpeg_mpeg2_level[] = {
436 static const char * const mpeg2_profile[] = {
440 "Spatially Scalable",
444 static const char * const mpeg_mpeg4_level[] = {
455 static const char * const mpeg4_profile[] = {
460 "Advanced Coding Efficiency",
464 static const char * const vpx_golden_frame_sel[] = {
465 "Use Previous Frame",
466 "Use Previous Specific Frame",
469 static const char * const vp8_profile[] = {
476 static const char * const vp9_profile[] = {
483 static const char * const vp9_level[] = {
501 static const char * const flash_led_mode[] = {
507 static const char * const flash_strobe_source[] = {
513 static const char * const jpeg_chroma_subsampling[] = {
522 static const char * const dv_tx_mode[] = {
527 static const char * const dv_rgb_range[] = {
529 "RGB Limited Range (16-235)",
530 "RGB Full Range (0-255)",
533 static const char * const dv_it_content_type[] = {
541 static const char * const detect_md_mode[] = {
549 static const char * const hevc_profile[] = {
551 "Main Still Picture",
555 static const char * const hevc_level[] = {
571 static const char * const hevc_hierarchial_coding_type[] = {
576 static const char * const hevc_refresh_type[] = {
582 static const char * const hevc_size_of_length_field[] = {
589 static const char * const hevc_tier[] = {
594 static const char * const hevc_loop_filter_mode[] = {
597 "Disabled at slice boundary",
600 static const char * const hevc_decode_mode[] = {
605 static const char * const hevc_start_code[] = {
607 "Annex B Start Code",
610 static const char * const camera_orientation[] = {
616 static const char * const mpeg_video_frame_skip[] = {
624 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
625 return mpeg_audio_sampling_freq;
626 case V4L2_CID_MPEG_AUDIO_ENCODING:
627 return mpeg_audio_encoding;
628 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
629 return mpeg_audio_l1_bitrate;
630 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
631 return mpeg_audio_l2_bitrate;
632 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
633 return mpeg_audio_l3_bitrate;
634 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
635 return mpeg_audio_ac3_bitrate;
636 case V4L2_CID_MPEG_AUDIO_MODE:
637 return mpeg_audio_mode;
638 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
639 return mpeg_audio_mode_extension;
640 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
641 return mpeg_audio_emphasis;
642 case V4L2_CID_MPEG_AUDIO_CRC:
643 return mpeg_audio_crc;
644 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
645 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
646 return mpeg_audio_dec_playback;
647 case V4L2_CID_MPEG_VIDEO_ENCODING:
648 return mpeg_video_encoding;
649 case V4L2_CID_MPEG_VIDEO_ASPECT:
650 return mpeg_video_aspect;
651 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
652 return mpeg_video_bitrate_mode;
653 case V4L2_CID_MPEG_STREAM_TYPE:
654 return mpeg_stream_type;
655 case V4L2_CID_MPEG_STREAM_VBI_FMT:
656 return mpeg_stream_vbi_fmt;
657 case V4L2_CID_POWER_LINE_FREQUENCY:
658 return camera_power_line_frequency;
659 case V4L2_CID_EXPOSURE_AUTO:
660 return camera_exposure_auto;
661 case V4L2_CID_EXPOSURE_METERING:
662 return camera_exposure_metering;
663 case V4L2_CID_AUTO_FOCUS_RANGE:
664 return camera_auto_focus_range;
665 case V4L2_CID_COLORFX:
667 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
668 return auto_n_preset_white_balance;
669 case V4L2_CID_ISO_SENSITIVITY_AUTO:
670 return camera_iso_sensitivity_auto;
671 case V4L2_CID_SCENE_MODE:
673 case V4L2_CID_TUNE_PREEMPHASIS:
674 return tune_emphasis;
675 case V4L2_CID_TUNE_DEEMPHASIS:
676 return tune_emphasis;
677 case V4L2_CID_FLASH_LED_MODE:
678 return flash_led_mode;
679 case V4L2_CID_FLASH_STROBE_SOURCE:
680 return flash_strobe_source;
681 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
683 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
684 return mpeg_video_frame_skip;
685 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
687 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
689 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
690 return mpeg_h264_level;
691 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
692 return h264_loop_filter;
693 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
695 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
697 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
698 return h264_fp_arrangement_type;
699 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
700 return h264_fmo_map_type;
701 case V4L2_CID_STATELESS_H264_DECODE_MODE:
702 return h264_decode_mode;
703 case V4L2_CID_STATELESS_H264_START_CODE:
704 return h264_start_code;
705 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:
706 return h264_hierarchical_coding_type;
707 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
708 return mpeg_mpeg2_level;
709 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
710 return mpeg2_profile;
711 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
712 return mpeg_mpeg4_level;
713 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
714 return mpeg4_profile;
715 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
716 return vpx_golden_frame_sel;
717 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
719 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
721 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
723 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
724 return jpeg_chroma_subsampling;
725 case V4L2_CID_DV_TX_MODE:
727 case V4L2_CID_DV_TX_RGB_RANGE:
728 case V4L2_CID_DV_RX_RGB_RANGE:
730 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
731 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
732 return dv_it_content_type;
733 case V4L2_CID_DETECT_MD_MODE:
734 return detect_md_mode;
735 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
737 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
739 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
740 return hevc_hierarchial_coding_type;
741 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
742 return hevc_refresh_type;
743 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
744 return hevc_size_of_length_field;
745 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
747 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
748 return hevc_loop_filter_mode;
749 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE:
750 return hevc_decode_mode;
751 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
752 return hevc_start_code;
753 case V4L2_CID_CAMERA_ORIENTATION:
754 return camera_orientation;
759 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
761 #define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
763 * Returns NULL or an s64 type array containing the menu for given
764 * control ID. The total number of the menu items is returned in @len.
766 const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
768 static const s64 qmenu_int_vpx_num_partitions[] = {
772 static const s64 qmenu_int_vpx_num_ref_frames[] = {
777 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
778 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
779 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
780 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
786 EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
788 /* Return the control name. */
789 const char *v4l2_ctrl_get_name(u32 id)
793 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
794 case V4L2_CID_USER_CLASS: return "User Controls";
795 case V4L2_CID_BRIGHTNESS: return "Brightness";
796 case V4L2_CID_CONTRAST: return "Contrast";
797 case V4L2_CID_SATURATION: return "Saturation";
798 case V4L2_CID_HUE: return "Hue";
799 case V4L2_CID_AUDIO_VOLUME: return "Volume";
800 case V4L2_CID_AUDIO_BALANCE: return "Balance";
801 case V4L2_CID_AUDIO_BASS: return "Bass";
802 case V4L2_CID_AUDIO_TREBLE: return "Treble";
803 case V4L2_CID_AUDIO_MUTE: return "Mute";
804 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
805 case V4L2_CID_BLACK_LEVEL: return "Black Level";
806 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
807 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
808 case V4L2_CID_RED_BALANCE: return "Red Balance";
809 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
810 case V4L2_CID_GAMMA: return "Gamma";
811 case V4L2_CID_EXPOSURE: return "Exposure";
812 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
813 case V4L2_CID_GAIN: return "Gain";
814 case V4L2_CID_HFLIP: return "Horizontal Flip";
815 case V4L2_CID_VFLIP: return "Vertical Flip";
816 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
817 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
818 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
819 case V4L2_CID_SHARPNESS: return "Sharpness";
820 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
821 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
822 case V4L2_CID_COLOR_KILLER: return "Color Killer";
823 case V4L2_CID_COLORFX: return "Color Effects";
824 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
825 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
826 case V4L2_CID_ROTATE: return "Rotate";
827 case V4L2_CID_BG_COLOR: return "Background Color";
828 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
829 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
830 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
831 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
832 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
833 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
834 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
837 /* The MPEG controls are applicable to all codec controls
838 * and the 'MPEG' part of the define is historical */
839 /* Keep the order of the 'case's the same as in videodev2.h! */
840 case V4L2_CID_CODEC_CLASS: return "Codec Controls";
841 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
842 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
843 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
844 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
845 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
846 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
847 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
848 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
849 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
850 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
851 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
852 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
853 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
854 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
855 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
856 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
857 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
858 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
859 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
860 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
861 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
862 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
863 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
864 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
865 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
866 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
867 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
868 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
869 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
870 case V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY: return "Constant Quality";
871 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
872 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
873 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
874 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
875 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
876 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
877 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
878 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
879 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
880 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
881 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
882 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
883 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: return "Frame Skip Mode";
884 case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY: return "Display Delay";
885 case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE: return "Display Delay Enable";
886 case V4L2_CID_MPEG_VIDEO_AU_DELIMITER: return "Generate Access Unit Delimiters";
887 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
888 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
889 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
890 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
891 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
892 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
893 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
894 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
895 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
896 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
897 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
898 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
899 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
900 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
901 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
902 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
903 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
904 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
905 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
906 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
907 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
908 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
909 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
910 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
911 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
912 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
913 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
914 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
915 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
916 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
917 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
918 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
919 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
920 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
921 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
922 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
923 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
924 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
925 return "H264 Set QP Value for HC Layers";
926 case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
927 return "H264 Constrained Intra Pred";
928 case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset";
929 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP: return "H264 I-Frame Minimum QP Value";
930 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP: return "H264 I-Frame Maximum QP Value";
931 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP: return "H264 P-Frame Minimum QP Value";
932 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP: return "H264 P-Frame Maximum QP Value";
933 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP: return "H264 B-Frame Minimum QP Value";
934 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP: return "H264 B-Frame Maximum QP Value";
935 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR: return "H264 Hierarchical Lay 0 Bitrate";
936 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR: return "H264 Hierarchical Lay 1 Bitrate";
937 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR: return "H264 Hierarchical Lay 2 Bitrate";
938 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR: return "H264 Hierarchical Lay 3 Bitrate";
939 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR: return "H264 Hierarchical Lay 4 Bitrate";
940 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR: return "H264 Hierarchical Lay 5 Bitrate";
941 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR: return "H264 Hierarchical Lay 6 Bitrate";
942 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: return "MPEG2 Level";
943 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: return "MPEG2 Profile";
944 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
945 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
946 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
947 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
948 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
949 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
950 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
951 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
952 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
953 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
954 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
955 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
956 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
957 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
958 case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR: return "Video Decoder Conceal Color";
959 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
960 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
961 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
962 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
963 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
964 case V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID: return "Base Layer Priority ID";
965 case V4L2_CID_MPEG_VIDEO_LTR_COUNT: return "LTR Count";
966 case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX: return "Frame LTR Index";
967 case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES: return "Use LTR Frames";
968 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
969 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices";
970 case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
971 case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value";
974 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
975 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
976 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
977 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
978 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
979 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
980 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
981 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
982 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
983 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
984 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
985 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
986 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
987 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: return "VP9 Level";
990 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value";
991 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP: return "HEVC P-Frame QP Value";
992 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP: return "HEVC B-Frame QP Value";
993 case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP: return "HEVC Minimum QP Value";
994 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP: return "HEVC Maximum QP Value";
995 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP: return "HEVC I-Frame Minimum QP Value";
996 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP: return "HEVC I-Frame Maximum QP Value";
997 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP: return "HEVC P-Frame Minimum QP Value";
998 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP: return "HEVC P-Frame Maximum QP Value";
999 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP: return "HEVC B-Frame Minimum QP Value";
1000 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP: return "HEVC B-Frame Maximum QP Value";
1001 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: return "HEVC Profile";
1002 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: return "HEVC Level";
1003 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: return "HEVC Tier";
1004 case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION: return "HEVC Frame Rate Resolution";
1005 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH: return "HEVC Maximum Coding Unit Depth";
1006 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: return "HEVC Refresh Type";
1007 case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED: return "HEVC Constant Intra Prediction";
1008 case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU: return "HEVC Lossless Encoding";
1009 case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT: return "HEVC Wavefront";
1010 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: return "HEVC Loop Filter";
1011 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP: return "HEVC QP Values";
1012 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: return "HEVC Hierarchical Coding Type";
1013 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER: return "HEVC Hierarchical Coding Layer";
1014 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP: return "HEVC Hierarchical Layer 0 QP";
1015 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP: return "HEVC Hierarchical Layer 1 QP";
1016 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP: return "HEVC Hierarchical Layer 2 QP";
1017 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP: return "HEVC Hierarchical Layer 3 QP";
1018 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP: return "HEVC Hierarchical Layer 4 QP";
1019 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP: return "HEVC Hierarchical Layer 5 QP";
1020 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP: return "HEVC Hierarchical Layer 6 QP";
1021 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR: return "HEVC Hierarchical Lay 0 BitRate";
1022 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR: return "HEVC Hierarchical Lay 1 BitRate";
1023 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR: return "HEVC Hierarchical Lay 2 BitRate";
1024 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR: return "HEVC Hierarchical Lay 3 BitRate";
1025 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR: return "HEVC Hierarchical Lay 4 BitRate";
1026 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR: return "HEVC Hierarchical Lay 5 BitRate";
1027 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR: return "HEVC Hierarchical Lay 6 BitRate";
1028 case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB: return "HEVC General PB";
1029 case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID: return "HEVC Temporal ID";
1030 case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING: return "HEVC Strong Intra Smoothing";
1031 case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT: return "HEVC Intra PU Split";
1032 case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION: return "HEVC TMV Prediction";
1033 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1: return "HEVC Max Num of Candidate MVs";
1034 case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE: return "HEVC ENC Without Startcode";
1035 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD: return "HEVC Num of I-Frame b/w 2 IDR";
1036 case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2: return "HEVC Loop Filter Beta Offset";
1037 case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2: return "HEVC Loop Filter TC Offset";
1038 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: return "HEVC Size of Length Field";
1039 case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES: return "Reference Frames for a P-Frame";
1040 case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR: return "Prepend SPS and PPS to IDR";
1041 case V4L2_CID_MPEG_VIDEO_HEVC_SPS: return "HEVC Sequence Parameter Set";
1042 case V4L2_CID_MPEG_VIDEO_HEVC_PPS: return "HEVC Picture Parameter Set";
1043 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters";
1044 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode";
1045 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code";
1047 /* CAMERA controls */
1048 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1049 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
1050 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
1051 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
1052 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
1053 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
1054 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
1055 case V4L2_CID_PAN_RESET: return "Pan, Reset";
1056 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
1057 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
1058 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
1059 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
1060 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
1061 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
1062 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
1063 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
1064 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
1065 case V4L2_CID_PRIVACY: return "Privacy";
1066 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
1067 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
1068 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
1069 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
1070 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
1071 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
1072 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
1073 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
1074 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
1075 case V4L2_CID_SCENE_MODE: return "Scene Mode";
1076 case V4L2_CID_3A_LOCK: return "3A Lock";
1077 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
1078 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
1079 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
1080 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
1081 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
1082 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
1083 case V4L2_CID_UNIT_CELL_SIZE: return "Unit Cell Size";
1084 case V4L2_CID_CAMERA_ORIENTATION: return "Camera Orientation";
1085 case V4L2_CID_CAMERA_SENSOR_ROTATION: return "Camera Sensor Rotation";
1087 /* FM Radio Modulator controls */
1088 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1089 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
1090 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
1091 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
1092 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
1093 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
1094 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
1095 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
1096 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
1097 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
1098 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
1099 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1100 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1101 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
1102 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
1103 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
1104 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
1105 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
1106 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
1107 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
1108 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
1109 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
1110 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
1111 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
1112 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
1113 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
1114 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
1115 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
1116 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
1117 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
1119 /* Flash controls */
1120 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1121 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
1122 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
1123 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
1124 case V4L2_CID_FLASH_STROBE: return "Strobe";
1125 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
1126 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
1127 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
1128 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
1129 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
1130 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
1131 case V4L2_CID_FLASH_FAULT: return "Faults";
1132 case V4L2_CID_FLASH_CHARGE: return "Charge";
1133 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
1135 /* JPEG encoder controls */
1136 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1137 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
1138 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
1139 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
1140 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
1141 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
1143 /* Image source controls */
1144 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1145 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
1146 case V4L2_CID_VBLANK: return "Vertical Blanking";
1147 case V4L2_CID_HBLANK: return "Horizontal Blanking";
1148 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
1149 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
1150 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
1151 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
1152 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
1154 /* Image processing controls */
1155 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1156 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
1157 case V4L2_CID_LINK_FREQ: return "Link Frequency";
1158 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
1159 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
1160 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
1161 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
1164 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1165 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
1166 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
1167 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
1168 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
1169 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
1170 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
1171 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
1172 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
1173 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
1174 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
1176 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
1177 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
1178 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
1179 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
1180 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
1181 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
1182 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
1183 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
1184 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
1185 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
1186 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
1187 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
1188 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
1189 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
1190 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
1191 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
1192 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
1193 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1194 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1195 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
1197 /* Detection controls */
1198 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1199 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
1200 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
1201 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
1202 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
1203 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
1205 /* Stateless Codec controls */
1206 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1207 case V4L2_CID_CODEC_STATELESS_CLASS: return "Stateless Codec Controls";
1208 case V4L2_CID_STATELESS_H264_DECODE_MODE: return "H264 Decode Mode";
1209 case V4L2_CID_STATELESS_H264_START_CODE: return "H264 Start Code";
1210 case V4L2_CID_STATELESS_H264_SPS: return "H264 Sequence Parameter Set";
1211 case V4L2_CID_STATELESS_H264_PPS: return "H264 Picture Parameter Set";
1212 case V4L2_CID_STATELESS_H264_SCALING_MATRIX: return "H264 Scaling Matrix";
1213 case V4L2_CID_STATELESS_H264_PRED_WEIGHTS: return "H264 Prediction Weight Table";
1214 case V4L2_CID_STATELESS_H264_SLICE_PARAMS: return "H264 Slice Parameters";
1215 case V4L2_CID_STATELESS_H264_DECODE_PARAMS: return "H264 Decode Parameters";
1216 case V4L2_CID_STATELESS_FWHT_PARAMS: return "FWHT Stateless Parameters";
1217 case V4L2_CID_STATELESS_VP8_FRAME: return "VP8 Frame Parameters";
1219 /* Colorimetry controls */
1220 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1221 case V4L2_CID_COLORIMETRY_CLASS: return "Colorimetry Controls";
1222 case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO: return "HDR10 Content Light Info";
1223 case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY: return "HDR10 Mastering Display";
1228 EXPORT_SYMBOL(v4l2_ctrl_get_name);
1230 void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
1231 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
1233 *name = v4l2_ctrl_get_name(id);
1237 case V4L2_CID_AUDIO_MUTE:
1238 case V4L2_CID_AUDIO_LOUDNESS:
1239 case V4L2_CID_AUTO_WHITE_BALANCE:
1240 case V4L2_CID_AUTOGAIN:
1241 case V4L2_CID_HFLIP:
1242 case V4L2_CID_VFLIP:
1243 case V4L2_CID_HUE_AUTO:
1244 case V4L2_CID_CHROMA_AGC:
1245 case V4L2_CID_COLOR_KILLER:
1246 case V4L2_CID_AUTOBRIGHTNESS:
1247 case V4L2_CID_MPEG_AUDIO_MUTE:
1248 case V4L2_CID_MPEG_VIDEO_MUTE:
1249 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
1250 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
1251 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
1252 case V4L2_CID_FOCUS_AUTO:
1253 case V4L2_CID_PRIVACY:
1254 case V4L2_CID_AUDIO_LIMITER_ENABLED:
1255 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
1256 case V4L2_CID_PILOT_TONE_ENABLED:
1257 case V4L2_CID_ILLUMINATORS_1:
1258 case V4L2_CID_ILLUMINATORS_2:
1259 case V4L2_CID_FLASH_STROBE_STATUS:
1260 case V4L2_CID_FLASH_CHARGE:
1261 case V4L2_CID_FLASH_READY:
1262 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
1263 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
1264 case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE:
1265 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
1266 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
1267 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
1268 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
1269 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
1270 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
1271 case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:
1272 case V4L2_CID_WIDE_DYNAMIC_RANGE:
1273 case V4L2_CID_IMAGE_STABILIZATION:
1274 case V4L2_CID_RDS_RECEPTION:
1275 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
1276 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
1277 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
1278 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1279 case V4L2_CID_RF_TUNER_PLL_LOCK:
1280 case V4L2_CID_RDS_TX_MONO_STEREO:
1281 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
1282 case V4L2_CID_RDS_TX_COMPRESSED:
1283 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
1284 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
1285 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
1286 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
1287 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
1288 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1289 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1290 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
1291 *type = V4L2_CTRL_TYPE_BOOLEAN;
1295 case V4L2_CID_ROTATE:
1296 *type = V4L2_CTRL_TYPE_INTEGER;
1297 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1299 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
1300 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1301 case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY:
1302 *type = V4L2_CTRL_TYPE_INTEGER;
1304 case V4L2_CID_MPEG_VIDEO_LTR_COUNT:
1305 *type = V4L2_CTRL_TYPE_INTEGER;
1307 case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:
1308 *type = V4L2_CTRL_TYPE_INTEGER;
1309 *flags |= V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1311 case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:
1312 *type = V4L2_CTRL_TYPE_BITMASK;
1313 *flags |= V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1315 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
1316 case V4L2_CID_PAN_RESET:
1317 case V4L2_CID_TILT_RESET:
1318 case V4L2_CID_FLASH_STROBE:
1319 case V4L2_CID_FLASH_STROBE_STOP:
1320 case V4L2_CID_AUTO_FOCUS_START:
1321 case V4L2_CID_AUTO_FOCUS_STOP:
1322 case V4L2_CID_DO_WHITE_BALANCE:
1323 *type = V4L2_CTRL_TYPE_BUTTON;
1324 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1325 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1326 *min = *max = *step = *def = 0;
1328 case V4L2_CID_POWER_LINE_FREQUENCY:
1329 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1330 case V4L2_CID_MPEG_AUDIO_ENCODING:
1331 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1332 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1333 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1334 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1335 case V4L2_CID_MPEG_AUDIO_MODE:
1336 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1337 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1338 case V4L2_CID_MPEG_AUDIO_CRC:
1339 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1340 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
1341 case V4L2_CID_MPEG_VIDEO_ENCODING:
1342 case V4L2_CID_MPEG_VIDEO_ASPECT:
1343 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1344 case V4L2_CID_MPEG_STREAM_TYPE:
1345 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1346 case V4L2_CID_EXPOSURE_AUTO:
1347 case V4L2_CID_AUTO_FOCUS_RANGE:
1348 case V4L2_CID_COLORFX:
1349 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
1350 case V4L2_CID_TUNE_PREEMPHASIS:
1351 case V4L2_CID_FLASH_LED_MODE:
1352 case V4L2_CID_FLASH_STROBE_SOURCE:
1353 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1354 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
1355 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1356 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1357 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1358 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1359 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1360 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
1361 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1362 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
1363 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE:
1364 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
1365 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
1366 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1367 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
1368 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
1369 case V4L2_CID_ISO_SENSITIVITY_AUTO:
1370 case V4L2_CID_EXPOSURE_METERING:
1371 case V4L2_CID_SCENE_MODE:
1372 case V4L2_CID_DV_TX_MODE:
1373 case V4L2_CID_DV_TX_RGB_RANGE:
1374 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
1375 case V4L2_CID_DV_RX_RGB_RANGE:
1376 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
1377 case V4L2_CID_TEST_PATTERN:
1378 case V4L2_CID_DEINTERLACING_MODE:
1379 case V4L2_CID_TUNE_DEEMPHASIS:
1380 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
1381 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
1382 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
1383 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
1384 case V4L2_CID_DETECT_MD_MODE:
1385 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
1386 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
1387 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
1388 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
1389 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
1390 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
1391 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
1392 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE:
1393 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
1394 case V4L2_CID_STATELESS_H264_DECODE_MODE:
1395 case V4L2_CID_STATELESS_H264_START_CODE:
1396 case V4L2_CID_CAMERA_ORIENTATION:
1397 *type = V4L2_CTRL_TYPE_MENU;
1399 case V4L2_CID_LINK_FREQ:
1400 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1402 case V4L2_CID_RDS_TX_PS_NAME:
1403 case V4L2_CID_RDS_TX_RADIO_TEXT:
1404 case V4L2_CID_RDS_RX_PS_NAME:
1405 case V4L2_CID_RDS_RX_RADIO_TEXT:
1406 *type = V4L2_CTRL_TYPE_STRING;
1408 case V4L2_CID_ISO_SENSITIVITY:
1409 case V4L2_CID_AUTO_EXPOSURE_BIAS:
1410 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1411 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
1412 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1414 case V4L2_CID_USER_CLASS:
1415 case V4L2_CID_CAMERA_CLASS:
1416 case V4L2_CID_CODEC_CLASS:
1417 case V4L2_CID_FM_TX_CLASS:
1418 case V4L2_CID_FLASH_CLASS:
1419 case V4L2_CID_JPEG_CLASS:
1420 case V4L2_CID_IMAGE_SOURCE_CLASS:
1421 case V4L2_CID_IMAGE_PROC_CLASS:
1422 case V4L2_CID_DV_CLASS:
1423 case V4L2_CID_FM_RX_CLASS:
1424 case V4L2_CID_RF_TUNER_CLASS:
1425 case V4L2_CID_DETECT_CLASS:
1426 case V4L2_CID_CODEC_STATELESS_CLASS:
1427 case V4L2_CID_COLORIMETRY_CLASS:
1428 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1429 /* You can neither read nor write these */
1430 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1431 *min = *max = *step = *def = 0;
1433 case V4L2_CID_BG_COLOR:
1434 *type = V4L2_CTRL_TYPE_INTEGER;
1437 /* Max is calculated as RGB888 that is 2^24 */
1440 case V4L2_CID_FLASH_FAULT:
1441 case V4L2_CID_JPEG_ACTIVE_MARKER:
1442 case V4L2_CID_3A_LOCK:
1443 case V4L2_CID_AUTO_FOCUS_STATUS:
1444 case V4L2_CID_DV_TX_HOTPLUG:
1445 case V4L2_CID_DV_TX_RXSENSE:
1446 case V4L2_CID_DV_TX_EDID_PRESENT:
1447 case V4L2_CID_DV_RX_POWER_PRESENT:
1448 *type = V4L2_CTRL_TYPE_BITMASK;
1450 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1451 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1452 *type = V4L2_CTRL_TYPE_INTEGER;
1453 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1455 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
1456 *type = V4L2_CTRL_TYPE_INTEGER64;
1457 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1459 *max = 0x1ffffffffLL;
1462 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1463 *type = V4L2_CTRL_TYPE_INTEGER64;
1464 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1466 *max = 0x7fffffffffffffffLL;
1469 case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR:
1470 *type = V4L2_CTRL_TYPE_INTEGER64;
1472 /* default for 8 bit black, luma is 16, chroma is 128 */
1473 *def = 0x8000800010LL;
1474 *max = 0xffffffffffffLL;
1477 case V4L2_CID_PIXEL_RATE:
1478 *type = V4L2_CTRL_TYPE_INTEGER64;
1479 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1481 case V4L2_CID_DETECT_MD_REGION_GRID:
1482 *type = V4L2_CTRL_TYPE_U8;
1484 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1485 *type = V4L2_CTRL_TYPE_U16;
1487 case V4L2_CID_RDS_TX_ALT_FREQS:
1488 *type = V4L2_CTRL_TYPE_U32;
1490 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
1491 *type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
1493 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
1494 *type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
1496 case V4L2_CID_STATELESS_FWHT_PARAMS:
1497 *type = V4L2_CTRL_TYPE_FWHT_PARAMS;
1499 case V4L2_CID_STATELESS_H264_SPS:
1500 *type = V4L2_CTRL_TYPE_H264_SPS;
1502 case V4L2_CID_STATELESS_H264_PPS:
1503 *type = V4L2_CTRL_TYPE_H264_PPS;
1505 case V4L2_CID_STATELESS_H264_SCALING_MATRIX:
1506 *type = V4L2_CTRL_TYPE_H264_SCALING_MATRIX;
1508 case V4L2_CID_STATELESS_H264_SLICE_PARAMS:
1509 *type = V4L2_CTRL_TYPE_H264_SLICE_PARAMS;
1511 case V4L2_CID_STATELESS_H264_DECODE_PARAMS:
1512 *type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
1514 case V4L2_CID_STATELESS_H264_PRED_WEIGHTS:
1515 *type = V4L2_CTRL_TYPE_H264_PRED_WEIGHTS;
1517 case V4L2_CID_STATELESS_VP8_FRAME:
1518 *type = V4L2_CTRL_TYPE_VP8_FRAME;
1520 case V4L2_CID_MPEG_VIDEO_HEVC_SPS:
1521 *type = V4L2_CTRL_TYPE_HEVC_SPS;
1523 case V4L2_CID_MPEG_VIDEO_HEVC_PPS:
1524 *type = V4L2_CTRL_TYPE_HEVC_PPS;
1526 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
1527 *type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
1529 case V4L2_CID_UNIT_CELL_SIZE:
1530 *type = V4L2_CTRL_TYPE_AREA;
1531 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1533 case V4L2_CID_COLORIMETRY_HDR10_CLL_INFO:
1534 *type = V4L2_CTRL_TYPE_HDR10_CLL_INFO;
1536 case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:
1537 *type = V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY;
1540 *type = V4L2_CTRL_TYPE_INTEGER;
1544 case V4L2_CID_MPEG_AUDIO_ENCODING:
1545 case V4L2_CID_MPEG_AUDIO_MODE:
1546 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1547 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1548 case V4L2_CID_MPEG_STREAM_TYPE:
1549 *flags |= V4L2_CTRL_FLAG_UPDATE;
1551 case V4L2_CID_AUDIO_VOLUME:
1552 case V4L2_CID_AUDIO_BALANCE:
1553 case V4L2_CID_AUDIO_BASS:
1554 case V4L2_CID_AUDIO_TREBLE:
1555 case V4L2_CID_BRIGHTNESS:
1556 case V4L2_CID_CONTRAST:
1557 case V4L2_CID_SATURATION:
1559 case V4L2_CID_RED_BALANCE:
1560 case V4L2_CID_BLUE_BALANCE:
1561 case V4L2_CID_GAMMA:
1562 case V4L2_CID_SHARPNESS:
1563 case V4L2_CID_CHROMA_GAIN:
1564 case V4L2_CID_RDS_TX_DEVIATION:
1565 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1566 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1567 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1568 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1569 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1570 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1571 case V4L2_CID_PILOT_TONE_DEVIATION:
1572 case V4L2_CID_PILOT_TONE_FREQUENCY:
1573 case V4L2_CID_TUNE_POWER_LEVEL:
1574 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1575 case V4L2_CID_RF_TUNER_RF_GAIN:
1576 case V4L2_CID_RF_TUNER_LNA_GAIN:
1577 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1578 case V4L2_CID_RF_TUNER_IF_GAIN:
1579 case V4L2_CID_RF_TUNER_BANDWIDTH:
1580 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
1581 *flags |= V4L2_CTRL_FLAG_SLIDER;
1583 case V4L2_CID_PAN_RELATIVE:
1584 case V4L2_CID_TILT_RELATIVE:
1585 case V4L2_CID_FOCUS_RELATIVE:
1586 case V4L2_CID_IRIS_RELATIVE:
1587 case V4L2_CID_ZOOM_RELATIVE:
1588 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1589 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1591 case V4L2_CID_FLASH_STROBE_STATUS:
1592 case V4L2_CID_AUTO_FOCUS_STATUS:
1593 case V4L2_CID_FLASH_READY:
1594 case V4L2_CID_DV_TX_HOTPLUG:
1595 case V4L2_CID_DV_TX_RXSENSE:
1596 case V4L2_CID_DV_TX_EDID_PRESENT:
1597 case V4L2_CID_DV_RX_POWER_PRESENT:
1598 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
1599 case V4L2_CID_RDS_RX_PTY:
1600 case V4L2_CID_RDS_RX_PS_NAME:
1601 case V4L2_CID_RDS_RX_RADIO_TEXT:
1602 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1603 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1604 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
1605 case V4L2_CID_CAMERA_ORIENTATION:
1606 case V4L2_CID_CAMERA_SENSOR_ROTATION:
1607 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1609 case V4L2_CID_RF_TUNER_PLL_LOCK:
1610 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1614 EXPORT_SYMBOL(v4l2_ctrl_fill);
1616 static u32 user_flags(const struct v4l2_ctrl *ctrl)
1618 u32 flags = ctrl->flags;
1621 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
1626 static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1628 memset(ev, 0, sizeof(*ev));
1629 ev->type = V4L2_EVENT_CTRL;
1631 ev->u.ctrl.changes = changes;
1632 ev->u.ctrl.type = ctrl->type;
1633 ev->u.ctrl.flags = user_flags(ctrl);
1635 ev->u.ctrl.value64 = 0;
1637 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
1638 ev->u.ctrl.minimum = ctrl->minimum;
1639 ev->u.ctrl.maximum = ctrl->maximum;
1640 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1641 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
1642 ev->u.ctrl.step = 1;
1644 ev->u.ctrl.step = ctrl->step;
1645 ev->u.ctrl.default_value = ctrl->default_value;
1648 static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1650 struct v4l2_event ev;
1651 struct v4l2_subscribed_event *sev;
1653 if (list_empty(&ctrl->ev_subs))
1655 fill_event(&ev, ctrl, changes);
1657 list_for_each_entry(sev, &ctrl->ev_subs, node)
1658 if (sev->fh != fh ||
1659 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
1660 v4l2_event_queue_fh(sev->fh, &ev);
1663 static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
1664 union v4l2_ctrl_ptr ptr1,
1665 union v4l2_ctrl_ptr ptr2)
1667 switch (ctrl->type) {
1668 case V4L2_CTRL_TYPE_BUTTON:
1670 case V4L2_CTRL_TYPE_STRING:
1671 idx *= ctrl->elem_size;
1672 /* strings are always 0-terminated */
1673 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
1674 case V4L2_CTRL_TYPE_INTEGER64:
1675 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
1676 case V4L2_CTRL_TYPE_U8:
1677 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1678 case V4L2_CTRL_TYPE_U16:
1679 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
1680 case V4L2_CTRL_TYPE_U32:
1681 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
1684 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1685 idx *= ctrl->elem_size;
1686 return !memcmp(ptr1.p_const + idx, ptr2.p_const + idx,
1691 static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
1692 union v4l2_ctrl_ptr ptr)
1694 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
1695 struct v4l2_ctrl_vp8_frame *p_vp8_frame;
1696 struct v4l2_ctrl_fwht_params *p_fwht_params;
1697 void *p = ptr.p + idx * ctrl->elem_size;
1699 if (ctrl->p_def.p_const)
1700 memcpy(p, ctrl->p_def.p_const, ctrl->elem_size);
1702 memset(p, 0, ctrl->elem_size);
1705 * The cast is needed to get rid of a gcc warning complaining that
1706 * V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS is not part of the
1707 * v4l2_ctrl_type enum.
1709 switch ((u32)ctrl->type) {
1710 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1711 p_mpeg2_slice_params = p;
1713 p_mpeg2_slice_params->sequence.chroma_format = 1;
1714 /* interlaced top field */
1715 p_mpeg2_slice_params->picture.picture_structure = 1;
1716 p_mpeg2_slice_params->picture.picture_coding_type =
1717 V4L2_MPEG2_PICTURE_CODING_TYPE_I;
1719 case V4L2_CTRL_TYPE_VP8_FRAME:
1721 p_vp8_frame->num_dct_parts = 1;
1723 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1725 p_fwht_params->version = V4L2_FWHT_VERSION;
1726 p_fwht_params->width = 1280;
1727 p_fwht_params->height = 720;
1728 p_fwht_params->flags = V4L2_FWHT_FL_PIXENC_YUV |
1729 (2 << V4L2_FWHT_FL_COMPONENTS_NUM_OFFSET);
1734 static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
1735 union v4l2_ctrl_ptr ptr)
1737 switch (ctrl->type) {
1738 case V4L2_CTRL_TYPE_STRING:
1739 idx *= ctrl->elem_size;
1740 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1741 ptr.p_char[idx + ctrl->minimum] = '\0';
1743 case V4L2_CTRL_TYPE_INTEGER64:
1744 ptr.p_s64[idx] = ctrl->default_value;
1746 case V4L2_CTRL_TYPE_INTEGER:
1747 case V4L2_CTRL_TYPE_INTEGER_MENU:
1748 case V4L2_CTRL_TYPE_MENU:
1749 case V4L2_CTRL_TYPE_BITMASK:
1750 case V4L2_CTRL_TYPE_BOOLEAN:
1751 ptr.p_s32[idx] = ctrl->default_value;
1753 case V4L2_CTRL_TYPE_BUTTON:
1754 case V4L2_CTRL_TYPE_CTRL_CLASS:
1757 case V4L2_CTRL_TYPE_U8:
1758 ptr.p_u8[idx] = ctrl->default_value;
1760 case V4L2_CTRL_TYPE_U16:
1761 ptr.p_u16[idx] = ctrl->default_value;
1763 case V4L2_CTRL_TYPE_U32:
1764 ptr.p_u32[idx] = ctrl->default_value;
1767 std_init_compound(ctrl, idx, ptr);
1772 static void std_log(const struct v4l2_ctrl *ctrl)
1774 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1776 if (ctrl->is_array) {
1779 for (i = 0; i < ctrl->nr_of_dims; i++)
1780 pr_cont("[%u]", ctrl->dims[i]);
1784 switch (ctrl->type) {
1785 case V4L2_CTRL_TYPE_INTEGER:
1786 pr_cont("%d", *ptr.p_s32);
1788 case V4L2_CTRL_TYPE_BOOLEAN:
1789 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1791 case V4L2_CTRL_TYPE_MENU:
1792 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1794 case V4L2_CTRL_TYPE_INTEGER_MENU:
1795 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1797 case V4L2_CTRL_TYPE_BITMASK:
1798 pr_cont("0x%08x", *ptr.p_s32);
1800 case V4L2_CTRL_TYPE_INTEGER64:
1801 pr_cont("%lld", *ptr.p_s64);
1803 case V4L2_CTRL_TYPE_STRING:
1804 pr_cont("%s", ptr.p_char);
1806 case V4L2_CTRL_TYPE_U8:
1807 pr_cont("%u", (unsigned)*ptr.p_u8);
1809 case V4L2_CTRL_TYPE_U16:
1810 pr_cont("%u", (unsigned)*ptr.p_u16);
1812 case V4L2_CTRL_TYPE_U32:
1813 pr_cont("%u", (unsigned)*ptr.p_u32);
1815 case V4L2_CTRL_TYPE_H264_SPS:
1816 pr_cont("H264_SPS");
1818 case V4L2_CTRL_TYPE_H264_PPS:
1819 pr_cont("H264_PPS");
1821 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
1822 pr_cont("H264_SCALING_MATRIX");
1824 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
1825 pr_cont("H264_SLICE_PARAMS");
1827 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
1828 pr_cont("H264_DECODE_PARAMS");
1830 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
1831 pr_cont("H264_PRED_WEIGHTS");
1833 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1834 pr_cont("FWHT_PARAMS");
1836 case V4L2_CTRL_TYPE_VP8_FRAME:
1837 pr_cont("VP8_FRAME");
1839 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
1840 pr_cont("HDR10_CLL_INFO");
1842 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
1843 pr_cont("HDR10_MASTERING_DISPLAY");
1846 pr_cont("unknown type %d", ctrl->type);
1852 * Round towards the closest legal value. Be careful when we are
1853 * close to the maximum range of the control type to prevent
1856 #define ROUND_TO_RANGE(val, offset_type, ctrl) \
1858 offset_type offset; \
1859 if ((ctrl)->maximum >= 0 && \
1860 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
1861 val = (ctrl)->maximum; \
1863 val += (s32)((ctrl)->step / 2); \
1864 val = clamp_t(typeof(val), val, \
1865 (ctrl)->minimum, (ctrl)->maximum); \
1866 offset = (val) - (ctrl)->minimum; \
1867 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
1868 val = (ctrl)->minimum + offset; \
1872 /* Validate a new control */
1874 #define zero_padding(s) \
1875 memset(&(s).padding, 0, sizeof((s).padding))
1876 #define zero_reserved(s) \
1877 memset(&(s).reserved, 0, sizeof((s).reserved))
1880 * Compound controls validation requires setting unused fields/flags to zero
1881 * in order to properly detect unchanged controls with std_equal's memcmp.
1883 static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
1884 union v4l2_ctrl_ptr ptr)
1886 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
1887 struct v4l2_ctrl_vp8_frame *p_vp8_frame;
1888 struct v4l2_ctrl_fwht_params *p_fwht_params;
1889 struct v4l2_ctrl_h264_sps *p_h264_sps;
1890 struct v4l2_ctrl_h264_pps *p_h264_pps;
1891 struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights;
1892 struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
1893 struct v4l2_ctrl_h264_decode_params *p_h264_dec_params;
1894 struct v4l2_ctrl_hevc_sps *p_hevc_sps;
1895 struct v4l2_ctrl_hevc_pps *p_hevc_pps;
1896 struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
1897 struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
1898 struct v4l2_area *area;
1899 void *p = ptr.p + idx * ctrl->elem_size;
1902 switch ((u32)ctrl->type) {
1903 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1904 p_mpeg2_slice_params = p;
1906 switch (p_mpeg2_slice_params->sequence.chroma_format) {
1915 switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
1916 case 0: /* 8 bits */
1917 case 1: /* 9 bits */
1918 case 2: /* 10 bits */
1919 case 3: /* 11 bits */
1925 switch (p_mpeg2_slice_params->picture.picture_structure) {
1926 case 1: /* interlaced top field */
1927 case 2: /* interlaced bottom field */
1928 case 3: /* progressive */
1934 switch (p_mpeg2_slice_params->picture.picture_coding_type) {
1935 case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
1936 case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
1937 case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
1945 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
1948 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1950 if (p_fwht_params->version < V4L2_FWHT_VERSION)
1952 if (!p_fwht_params->width || !p_fwht_params->height)
1956 case V4L2_CTRL_TYPE_H264_SPS:
1959 /* Some syntax elements are only conditionally valid */
1960 if (p_h264_sps->pic_order_cnt_type != 0) {
1961 p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0;
1962 } else if (p_h264_sps->pic_order_cnt_type != 1) {
1963 p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0;
1964 p_h264_sps->offset_for_non_ref_pic = 0;
1965 p_h264_sps->offset_for_top_to_bottom_field = 0;
1966 memset(&p_h264_sps->offset_for_ref_frame, 0,
1967 sizeof(p_h264_sps->offset_for_ref_frame));
1970 if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) {
1971 p_h264_sps->chroma_format_idc = 1;
1972 p_h264_sps->bit_depth_luma_minus8 = 0;
1973 p_h264_sps->bit_depth_chroma_minus8 = 0;
1975 p_h264_sps->flags &=
1976 ~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
1978 if (p_h264_sps->chroma_format_idc < 3)
1979 p_h264_sps->flags &=
1980 ~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
1983 if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
1984 p_h264_sps->flags &=
1985 ~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
1988 * Chroma 4:2:2 format require at least High 4:2:2 profile.
1990 * The H264 specification and well-known parser implementations
1991 * use profile-idc values directly, as that is clearer and
1992 * less ambiguous. We do the same here.
1994 if (p_h264_sps->profile_idc < 122 &&
1995 p_h264_sps->chroma_format_idc > 1)
1997 /* Chroma 4:4:4 format require at least High 4:2:2 profile */
1998 if (p_h264_sps->profile_idc < 244 &&
1999 p_h264_sps->chroma_format_idc > 2)
2001 if (p_h264_sps->chroma_format_idc > 3)
2004 if (p_h264_sps->bit_depth_luma_minus8 > 6)
2006 if (p_h264_sps->bit_depth_chroma_minus8 > 6)
2008 if (p_h264_sps->log2_max_frame_num_minus4 > 12)
2010 if (p_h264_sps->pic_order_cnt_type > 2)
2012 if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12)
2014 if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN)
2018 case V4L2_CTRL_TYPE_H264_PPS:
2021 if (p_h264_pps->num_slice_groups_minus1 > 7)
2023 if (p_h264_pps->num_ref_idx_l0_default_active_minus1 >
2024 (V4L2_H264_REF_LIST_LEN - 1))
2026 if (p_h264_pps->num_ref_idx_l1_default_active_minus1 >
2027 (V4L2_H264_REF_LIST_LEN - 1))
2029 if (p_h264_pps->weighted_bipred_idc > 2)
2032 * pic_init_qp_minus26 shall be in the range of
2033 * -(26 + QpBdOffset_y) to +25, inclusive,
2034 * where QpBdOffset_y is 6 * bit_depth_luma_minus8
2036 if (p_h264_pps->pic_init_qp_minus26 < -62 ||
2037 p_h264_pps->pic_init_qp_minus26 > 25)
2039 if (p_h264_pps->pic_init_qs_minus26 < -26 ||
2040 p_h264_pps->pic_init_qs_minus26 > 25)
2042 if (p_h264_pps->chroma_qp_index_offset < -12 ||
2043 p_h264_pps->chroma_qp_index_offset > 12)
2045 if (p_h264_pps->second_chroma_qp_index_offset < -12 ||
2046 p_h264_pps->second_chroma_qp_index_offset > 12)
2050 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
2053 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
2054 p_h264_pred_weights = p;
2056 if (p_h264_pred_weights->luma_log2_weight_denom > 7)
2058 if (p_h264_pred_weights->chroma_log2_weight_denom > 7)
2062 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
2063 p_h264_slice_params = p;
2065 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
2066 p_h264_slice_params->flags &=
2067 ~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
2069 if (p_h264_slice_params->colour_plane_id > 2)
2071 if (p_h264_slice_params->cabac_init_idc > 2)
2073 if (p_h264_slice_params->disable_deblocking_filter_idc > 2)
2075 if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 ||
2076 p_h264_slice_params->slice_alpha_c0_offset_div2 > 6)
2078 if (p_h264_slice_params->slice_beta_offset_div2 < -6 ||
2079 p_h264_slice_params->slice_beta_offset_div2 > 6)
2082 if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I ||
2083 p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI)
2084 p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0;
2085 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
2086 p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0;
2088 if (p_h264_slice_params->num_ref_idx_l0_active_minus1 >
2089 (V4L2_H264_REF_LIST_LEN - 1))
2091 if (p_h264_slice_params->num_ref_idx_l1_active_minus1 >
2092 (V4L2_H264_REF_LIST_LEN - 1))
2094 zero_reserved(*p_h264_slice_params);
2097 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
2098 p_h264_dec_params = p;
2100 if (p_h264_dec_params->nal_ref_idc > 3)
2102 for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
2103 struct v4l2_h264_dpb_entry *dpb_entry =
2104 &p_h264_dec_params->dpb[i];
2106 zero_reserved(*dpb_entry);
2108 zero_reserved(*p_h264_dec_params);
2111 case V4L2_CTRL_TYPE_VP8_FRAME:
2114 switch (p_vp8_frame->num_dct_parts) {
2123 zero_padding(p_vp8_frame->segment);
2124 zero_padding(p_vp8_frame->lf);
2125 zero_padding(p_vp8_frame->quant);
2126 zero_padding(p_vp8_frame->entropy);
2127 zero_padding(p_vp8_frame->coder_state);
2130 case V4L2_CTRL_TYPE_HEVC_SPS:
2133 if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) {
2134 p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0;
2135 p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0;
2136 p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0;
2137 p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0;
2140 if (!(p_hevc_sps->flags &
2141 V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT))
2142 p_hevc_sps->num_long_term_ref_pics_sps = 0;
2145 case V4L2_CTRL_TYPE_HEVC_PPS:
2148 if (!(p_hevc_pps->flags &
2149 V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED))
2150 p_hevc_pps->diff_cu_qp_delta_depth = 0;
2152 if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) {
2153 p_hevc_pps->num_tile_columns_minus1 = 0;
2154 p_hevc_pps->num_tile_rows_minus1 = 0;
2155 memset(&p_hevc_pps->column_width_minus1, 0,
2156 sizeof(p_hevc_pps->column_width_minus1));
2157 memset(&p_hevc_pps->row_height_minus1, 0,
2158 sizeof(p_hevc_pps->row_height_minus1));
2160 p_hevc_pps->flags &=
2161 ~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED;
2164 if (p_hevc_pps->flags &
2165 V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) {
2166 p_hevc_pps->pps_beta_offset_div2 = 0;
2167 p_hevc_pps->pps_tc_offset_div2 = 0;
2170 zero_padding(*p_hevc_pps);
2173 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
2174 p_hevc_slice_params = p;
2176 if (p_hevc_slice_params->num_active_dpb_entries >
2177 V4L2_HEVC_DPB_ENTRIES_NUM_MAX)
2180 zero_padding(p_hevc_slice_params->pred_weight_table);
2182 for (i = 0; i < p_hevc_slice_params->num_active_dpb_entries;
2184 struct v4l2_hevc_dpb_entry *dpb_entry =
2185 &p_hevc_slice_params->dpb[i];
2187 zero_padding(*dpb_entry);
2190 zero_padding(*p_hevc_slice_params);
2193 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
2196 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
2197 p_hdr10_mastering = p;
2199 for (i = 0; i < 3; ++i) {
2200 if (p_hdr10_mastering->display_primaries_x[i] <
2201 V4L2_HDR10_MASTERING_PRIMARIES_X_LOW ||
2202 p_hdr10_mastering->display_primaries_x[i] >
2203 V4L2_HDR10_MASTERING_PRIMARIES_X_HIGH ||
2204 p_hdr10_mastering->display_primaries_y[i] <
2205 V4L2_HDR10_MASTERING_PRIMARIES_Y_LOW ||
2206 p_hdr10_mastering->display_primaries_y[i] >
2207 V4L2_HDR10_MASTERING_PRIMARIES_Y_HIGH)
2211 if (p_hdr10_mastering->white_point_x <
2212 V4L2_HDR10_MASTERING_WHITE_POINT_X_LOW ||
2213 p_hdr10_mastering->white_point_x >
2214 V4L2_HDR10_MASTERING_WHITE_POINT_X_HIGH ||
2215 p_hdr10_mastering->white_point_y <
2216 V4L2_HDR10_MASTERING_WHITE_POINT_Y_LOW ||
2217 p_hdr10_mastering->white_point_y >
2218 V4L2_HDR10_MASTERING_WHITE_POINT_Y_HIGH)
2221 if (p_hdr10_mastering->max_display_mastering_luminance <
2222 V4L2_HDR10_MASTERING_MAX_LUMA_LOW ||
2223 p_hdr10_mastering->max_display_mastering_luminance >
2224 V4L2_HDR10_MASTERING_MAX_LUMA_HIGH ||
2225 p_hdr10_mastering->min_display_mastering_luminance <
2226 V4L2_HDR10_MASTERING_MIN_LUMA_LOW ||
2227 p_hdr10_mastering->min_display_mastering_luminance >
2228 V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
2231 /* The following restriction comes from ITU-T Rec. H.265 spec */
2232 if (p_hdr10_mastering->max_display_mastering_luminance ==
2233 V4L2_HDR10_MASTERING_MAX_LUMA_LOW &&
2234 p_hdr10_mastering->min_display_mastering_luminance ==
2235 V4L2_HDR10_MASTERING_MIN_LUMA_HIGH)
2240 case V4L2_CTRL_TYPE_AREA:
2242 if (!area->width || !area->height)
2253 static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
2254 union v4l2_ctrl_ptr ptr)
2260 switch ((u32)ctrl->type) {
2261 case V4L2_CTRL_TYPE_INTEGER:
2262 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
2263 case V4L2_CTRL_TYPE_INTEGER64:
2265 * We can't use the ROUND_TO_RANGE define here due to
2266 * the u64 divide that needs special care.
2268 val = ptr.p_s64[idx];
2269 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
2270 val = ctrl->maximum;
2272 val += (s64)(ctrl->step / 2);
2273 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
2274 offset = val - ctrl->minimum;
2275 do_div(offset, ctrl->step);
2276 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
2278 case V4L2_CTRL_TYPE_U8:
2279 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
2280 case V4L2_CTRL_TYPE_U16:
2281 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
2282 case V4L2_CTRL_TYPE_U32:
2283 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
2285 case V4L2_CTRL_TYPE_BOOLEAN:
2286 ptr.p_s32[idx] = !!ptr.p_s32[idx];
2289 case V4L2_CTRL_TYPE_MENU:
2290 case V4L2_CTRL_TYPE_INTEGER_MENU:
2291 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
2293 if (ptr.p_s32[idx] < BITS_PER_LONG_LONG &&
2294 (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx])))
2296 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
2297 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
2301 case V4L2_CTRL_TYPE_BITMASK:
2302 ptr.p_s32[idx] &= ctrl->maximum;
2305 case V4L2_CTRL_TYPE_BUTTON:
2306 case V4L2_CTRL_TYPE_CTRL_CLASS:
2310 case V4L2_CTRL_TYPE_STRING:
2311 idx *= ctrl->elem_size;
2312 len = strlen(ptr.p_char + idx);
2313 if (len < ctrl->minimum)
2315 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
2320 return std_validate_compound(ctrl, idx, ptr);
2324 static const struct v4l2_ctrl_type_ops std_type_ops = {
2328 .validate = std_validate,
2331 /* Helper function: copy the given control value back to the caller */
2332 static int ptr_to_user(struct v4l2_ext_control *c,
2333 struct v4l2_ctrl *ctrl,
2334 union v4l2_ctrl_ptr ptr)
2338 if (ctrl->is_ptr && !ctrl->is_string)
2339 return copy_to_user(c->ptr, ptr.p_const, c->size) ?
2342 switch (ctrl->type) {
2343 case V4L2_CTRL_TYPE_STRING:
2344 len = strlen(ptr.p_char);
2345 if (c->size < len + 1) {
2346 c->size = ctrl->elem_size;
2349 return copy_to_user(c->string, ptr.p_char, len + 1) ?
2351 case V4L2_CTRL_TYPE_INTEGER64:
2352 c->value64 = *ptr.p_s64;
2355 c->value = *ptr.p_s32;
2361 /* Helper function: copy the current control value back to the caller */
2362 static int cur_to_user(struct v4l2_ext_control *c,
2363 struct v4l2_ctrl *ctrl)
2365 return ptr_to_user(c, ctrl, ctrl->p_cur);
2368 /* Helper function: copy the new control value back to the caller */
2369 static int new_to_user(struct v4l2_ext_control *c,
2370 struct v4l2_ctrl *ctrl)
2372 return ptr_to_user(c, ctrl, ctrl->p_new);
2375 /* Helper function: copy the request value back to the caller */
2376 static int req_to_user(struct v4l2_ext_control *c,
2377 struct v4l2_ctrl_ref *ref)
2379 return ptr_to_user(c, ref->ctrl, ref->p_req);
2382 /* Helper function: copy the initial control value back to the caller */
2383 static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
2387 for (idx = 0; idx < ctrl->elems; idx++)
2388 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2390 return ptr_to_user(c, ctrl, ctrl->p_new);
2393 /* Helper function: copy the caller-provider value to the given control value */
2394 static int user_to_ptr(struct v4l2_ext_control *c,
2395 struct v4l2_ctrl *ctrl,
2396 union v4l2_ctrl_ptr ptr)
2402 if (ctrl->is_ptr && !ctrl->is_string) {
2405 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
2406 if (ret || !ctrl->is_array)
2408 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
2409 ctrl->type_ops->init(ctrl, idx, ptr);
2413 switch (ctrl->type) {
2414 case V4L2_CTRL_TYPE_INTEGER64:
2415 *ptr.p_s64 = c->value64;
2417 case V4L2_CTRL_TYPE_STRING:
2421 if (size > ctrl->maximum + 1)
2422 size = ctrl->maximum + 1;
2423 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
2425 char last = ptr.p_char[size - 1];
2427 ptr.p_char[size - 1] = 0;
2428 /* If the string was longer than ctrl->maximum,
2429 then return an error. */
2430 if (strlen(ptr.p_char) == ctrl->maximum && last)
2435 *ptr.p_s32 = c->value;
2441 /* Helper function: copy the caller-provider value as the new control value */
2442 static int user_to_new(struct v4l2_ext_control *c,
2443 struct v4l2_ctrl *ctrl)
2445 return user_to_ptr(c, ctrl, ctrl->p_new);
2448 /* Copy the one value to another. */
2449 static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
2450 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
2454 memcpy(to.p, from.p_const, ctrl->elems * ctrl->elem_size);
2457 /* Copy the new value to the current value. */
2458 static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
2465 /* has_changed is set by cluster_changed */
2466 changed = ctrl->has_changed;
2468 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
2470 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
2471 /* Note: CH_FLAGS is only set for auto clusters. */
2473 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
2474 if (!is_cur_manual(ctrl->cluster[0])) {
2475 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
2476 if (ctrl->cluster[0]->has_volatiles)
2477 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
2481 if (changed || ch_flags) {
2482 /* If a control was changed that was not one of the controls
2483 modified by the application, then send the event to all. */
2486 send_event(fh, ctrl,
2487 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
2488 if (ctrl->call_notify && changed && ctrl->handler->notify)
2489 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
2493 /* Copy the current value to the new value */
2494 static void cur_to_new(struct v4l2_ctrl *ctrl)
2498 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
2501 /* Copy the new value to the request value */
2502 static void new_to_req(struct v4l2_ctrl_ref *ref)
2506 ptr_to_ptr(ref->ctrl, ref->ctrl->p_new, ref->p_req);
2507 ref->valid_p_req = true;
2510 /* Copy the current value to the request value */
2511 static void cur_to_req(struct v4l2_ctrl_ref *ref)
2515 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->p_req);
2516 ref->valid_p_req = true;
2519 /* Copy the request value to the new value */
2520 static void req_to_new(struct v4l2_ctrl_ref *ref)
2524 if (ref->valid_p_req)
2525 ptr_to_ptr(ref->ctrl, ref->p_req, ref->ctrl->p_new);
2527 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->ctrl->p_new);
2530 /* Return non-zero if one or more of the controls in the cluster has a new
2531 value that differs from the current value. */
2532 static int cluster_changed(struct v4l2_ctrl *master)
2534 bool changed = false;
2538 for (i = 0; i < master->ncontrols; i++) {
2539 struct v4l2_ctrl *ctrl = master->cluster[i];
2540 bool ctrl_changed = false;
2545 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
2546 changed = ctrl_changed = true;
2549 * Set has_changed to false to avoid generating
2550 * the event V4L2_EVENT_CTRL_CH_VALUE
2552 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
2553 ctrl->has_changed = false;
2557 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
2558 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
2559 ctrl->p_cur, ctrl->p_new);
2560 ctrl->has_changed = ctrl_changed;
2561 changed |= ctrl->has_changed;
2566 /* Control range checking */
2567 static int check_range(enum v4l2_ctrl_type type,
2568 s64 min, s64 max, u64 step, s64 def)
2571 case V4L2_CTRL_TYPE_BOOLEAN:
2572 if (step != 1 || max > 1 || min < 0)
2575 case V4L2_CTRL_TYPE_U8:
2576 case V4L2_CTRL_TYPE_U16:
2577 case V4L2_CTRL_TYPE_U32:
2578 case V4L2_CTRL_TYPE_INTEGER:
2579 case V4L2_CTRL_TYPE_INTEGER64:
2580 if (step == 0 || min > max || def < min || def > max)
2583 case V4L2_CTRL_TYPE_BITMASK:
2584 if (step || min || !max || (def & ~max))
2587 case V4L2_CTRL_TYPE_MENU:
2588 case V4L2_CTRL_TYPE_INTEGER_MENU:
2589 if (min > max || def < min || def > max)
2591 /* Note: step == menu_skip_mask for menu controls.
2592 So here we check if the default value is masked out. */
2593 if (step && ((1 << def) & step))
2596 case V4L2_CTRL_TYPE_STRING:
2597 if (min > max || min < 0 || step < 1 || def)
2605 /* Validate a new control */
2606 static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
2611 for (idx = 0; !err && idx < ctrl->elems; idx++)
2612 err = ctrl->type_ops->validate(ctrl, idx, p_new);
2616 static inline u32 node2id(struct list_head *node)
2618 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
2621 /* Set the handler's error code if it wasn't set earlier already */
2622 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
2624 if (hdl->error == 0)
2629 /* Initialize the handler */
2630 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
2631 unsigned nr_of_controls_hint,
2632 struct lock_class_key *key, const char *name)
2634 mutex_init(&hdl->_lock);
2635 hdl->lock = &hdl->_lock;
2636 lockdep_set_class_and_name(hdl->lock, key, name);
2637 INIT_LIST_HEAD(&hdl->ctrls);
2638 INIT_LIST_HEAD(&hdl->ctrl_refs);
2639 INIT_LIST_HEAD(&hdl->requests);
2640 INIT_LIST_HEAD(&hdl->requests_queued);
2641 hdl->request_is_queued = false;
2642 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
2643 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
2644 sizeof(hdl->buckets[0]),
2645 GFP_KERNEL | __GFP_ZERO);
2646 hdl->error = hdl->buckets ? 0 : -ENOMEM;
2647 media_request_object_init(&hdl->req_obj);
2650 EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
2652 /* Free all controls and control refs */
2653 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
2655 struct v4l2_ctrl_ref *ref, *next_ref;
2656 struct v4l2_ctrl *ctrl, *next_ctrl;
2657 struct v4l2_subscribed_event *sev, *next_sev;
2659 if (hdl == NULL || hdl->buckets == NULL)
2663 * If the main handler is freed and it is used by handler objects in
2664 * outstanding requests, then unbind and put those objects before
2665 * freeing the main handler.
2667 * The main handler can be identified by having a NULL ops pointer in
2668 * the request object.
2670 if (!hdl->req_obj.ops && !list_empty(&hdl->requests)) {
2671 struct v4l2_ctrl_handler *req, *next_req;
2673 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) {
2674 media_request_object_unbind(&req->req_obj);
2675 media_request_object_put(&req->req_obj);
2678 mutex_lock(hdl->lock);
2679 /* Free all nodes */
2680 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
2681 list_del(&ref->node);
2684 /* Free all controls owned by the handler */
2685 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
2686 list_del(&ctrl->node);
2687 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
2688 list_del(&sev->node);
2691 kvfree(hdl->buckets);
2692 hdl->buckets = NULL;
2695 mutex_unlock(hdl->lock);
2696 mutex_destroy(&hdl->_lock);
2698 EXPORT_SYMBOL(v4l2_ctrl_handler_free);
2700 /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
2701 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
2702 with applications that do not use the NEXT_CTRL flag.
2704 We just find the n-th private user control. It's O(N), but that should not
2705 be an issue in this particular case. */
2706 static struct v4l2_ctrl_ref *find_private_ref(
2707 struct v4l2_ctrl_handler *hdl, u32 id)
2709 struct v4l2_ctrl_ref *ref;
2711 id -= V4L2_CID_PRIVATE_BASE;
2712 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2713 /* Search for private user controls that are compatible with
2715 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
2716 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
2717 if (!ref->ctrl->is_int)
2727 /* Find a control with the given ID. */
2728 static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
2730 struct v4l2_ctrl_ref *ref;
2733 id &= V4L2_CTRL_ID_MASK;
2735 /* Old-style private controls need special handling */
2736 if (id >= V4L2_CID_PRIVATE_BASE)
2737 return find_private_ref(hdl, id);
2738 bucket = id % hdl->nr_of_buckets;
2740 /* Simple optimization: cache the last control found */
2741 if (hdl->cached && hdl->cached->ctrl->id == id)
2744 /* Not in cache, search the hash */
2745 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
2746 while (ref && ref->ctrl->id != id)
2750 hdl->cached = ref; /* cache it! */
2754 /* Find a control with the given ID. Take the handler's lock first. */
2755 static struct v4l2_ctrl_ref *find_ref_lock(
2756 struct v4l2_ctrl_handler *hdl, u32 id)
2758 struct v4l2_ctrl_ref *ref = NULL;
2761 mutex_lock(hdl->lock);
2762 ref = find_ref(hdl, id);
2763 mutex_unlock(hdl->lock);
2768 /* Find a control with the given ID. */
2769 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
2771 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
2773 return ref ? ref->ctrl : NULL;
2775 EXPORT_SYMBOL(v4l2_ctrl_find);
2777 /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
2778 static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
2779 struct v4l2_ctrl *ctrl,
2780 struct v4l2_ctrl_ref **ctrl_ref,
2781 bool from_other_dev, bool allocate_req)
2783 struct v4l2_ctrl_ref *ref;
2784 struct v4l2_ctrl_ref *new_ref;
2786 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
2787 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
2788 unsigned int size_extra_req = 0;
2794 * Automatically add the control class if it is not yet present and
2795 * the new control is not a compound control.
2797 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
2798 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
2799 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
2806 size_extra_req = ctrl->elems * ctrl->elem_size;
2807 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
2809 return handler_set_err(hdl, -ENOMEM);
2810 new_ref->ctrl = ctrl;
2811 new_ref->from_other_dev = from_other_dev;
2813 new_ref->p_req.p = &new_ref[1];
2815 INIT_LIST_HEAD(&new_ref->node);
2817 mutex_lock(hdl->lock);
2819 /* Add immediately at the end of the list if the list is empty, or if
2820 the last element in the list has a lower ID.
2821 This ensures that when elements are added in ascending order the
2822 insertion is an O(1) operation. */
2823 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
2824 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
2825 goto insert_in_hash;
2828 /* Find insert position in sorted list */
2829 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2830 if (ref->ctrl->id < id)
2832 /* Don't add duplicates */
2833 if (ref->ctrl->id == id) {
2837 list_add(&new_ref->node, ref->node.prev);
2842 /* Insert the control node in the hash */
2843 new_ref->next = hdl->buckets[bucket];
2844 hdl->buckets[bucket] = new_ref;
2846 *ctrl_ref = new_ref;
2847 if (ctrl->handler == hdl) {
2848 /* By default each control starts in a cluster of its own.
2849 * new_ref->ctrl is basically a cluster array with one
2850 * element, so that's perfect to use as the cluster pointer.
2851 * But only do this for the handler that owns the control.
2853 ctrl->cluster = &new_ref->ctrl;
2854 ctrl->ncontrols = 1;
2858 mutex_unlock(hdl->lock);
2862 /* Add a new control */
2863 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
2864 const struct v4l2_ctrl_ops *ops,
2865 const struct v4l2_ctrl_type_ops *type_ops,
2866 u32 id, const char *name, enum v4l2_ctrl_type type,
2867 s64 min, s64 max, u64 step, s64 def,
2868 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
2869 u32 flags, const char * const *qmenu,
2870 const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def,
2873 struct v4l2_ctrl *ctrl;
2875 unsigned nr_of_dims = 0;
2878 unsigned tot_ctrl_size;
2886 while (dims && dims[nr_of_dims]) {
2887 elems *= dims[nr_of_dims];
2889 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
2892 is_array = nr_of_dims > 0;
2894 /* Prefill elem_size for all types handled by std_type_ops */
2895 switch ((u32)type) {
2896 case V4L2_CTRL_TYPE_INTEGER64:
2897 elem_size = sizeof(s64);
2899 case V4L2_CTRL_TYPE_STRING:
2900 elem_size = max + 1;
2902 case V4L2_CTRL_TYPE_U8:
2903 elem_size = sizeof(u8);
2905 case V4L2_CTRL_TYPE_U16:
2906 elem_size = sizeof(u16);
2908 case V4L2_CTRL_TYPE_U32:
2909 elem_size = sizeof(u32);
2911 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
2912 elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
2914 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
2915 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
2917 case V4L2_CTRL_TYPE_FWHT_PARAMS:
2918 elem_size = sizeof(struct v4l2_ctrl_fwht_params);
2920 case V4L2_CTRL_TYPE_H264_SPS:
2921 elem_size = sizeof(struct v4l2_ctrl_h264_sps);
2923 case V4L2_CTRL_TYPE_H264_PPS:
2924 elem_size = sizeof(struct v4l2_ctrl_h264_pps);
2926 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
2927 elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix);
2929 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
2930 elem_size = sizeof(struct v4l2_ctrl_h264_slice_params);
2932 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
2933 elem_size = sizeof(struct v4l2_ctrl_h264_decode_params);
2935 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
2936 elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights);
2938 case V4L2_CTRL_TYPE_VP8_FRAME:
2939 elem_size = sizeof(struct v4l2_ctrl_vp8_frame);
2941 case V4L2_CTRL_TYPE_HEVC_SPS:
2942 elem_size = sizeof(struct v4l2_ctrl_hevc_sps);
2944 case V4L2_CTRL_TYPE_HEVC_PPS:
2945 elem_size = sizeof(struct v4l2_ctrl_hevc_pps);
2947 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
2948 elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
2950 case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
2951 elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info);
2953 case V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY:
2954 elem_size = sizeof(struct v4l2_ctrl_hdr10_mastering_display);
2956 case V4L2_CTRL_TYPE_AREA:
2957 elem_size = sizeof(struct v4l2_area);
2960 if (type < V4L2_CTRL_COMPOUND_TYPES)
2961 elem_size = sizeof(s32);
2964 tot_ctrl_size = elem_size * elems;
2967 if (id == 0 || name == NULL || !elem_size ||
2968 id >= V4L2_CID_PRIVATE_BASE ||
2969 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2970 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
2971 handler_set_err(hdl, -ERANGE);
2974 err = check_range(type, min, max, step, def);
2976 handler_set_err(hdl, err);
2980 (type == V4L2_CTRL_TYPE_BUTTON ||
2981 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2982 handler_set_err(hdl, -EINVAL);
2987 if (type == V4L2_CTRL_TYPE_BUTTON)
2988 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2989 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
2990 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2991 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2992 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2993 type == V4L2_CTRL_TYPE_STRING ||
2994 type >= V4L2_CTRL_COMPOUND_TYPES ||
2996 sz_extra += 2 * tot_ctrl_size;
2998 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const)
2999 sz_extra += elem_size;
3001 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
3003 handler_set_err(hdl, -ENOMEM);
3007 INIT_LIST_HEAD(&ctrl->node);
3008 INIT_LIST_HEAD(&ctrl->ev_subs);
3009 ctrl->handler = hdl;
3011 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
3015 ctrl->flags = flags;
3016 ctrl->minimum = min;
3017 ctrl->maximum = max;
3019 ctrl->default_value = def;
3020 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
3021 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
3022 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
3023 ctrl->is_array = is_array;
3024 ctrl->elems = elems;
3025 ctrl->nr_of_dims = nr_of_dims;
3027 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
3028 ctrl->elem_size = elem_size;
3029 if (type == V4L2_CTRL_TYPE_MENU)
3030 ctrl->qmenu = qmenu;
3031 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
3032 ctrl->qmenu_int = qmenu_int;
3034 ctrl->cur.val = ctrl->val = def;
3037 if (!ctrl->is_int) {
3038 ctrl->p_new.p = data;
3039 ctrl->p_cur.p = data + tot_ctrl_size;
3041 ctrl->p_new.p = &ctrl->val;
3042 ctrl->p_cur.p = &ctrl->cur.val;
3045 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) {
3046 ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size;
3047 memcpy(ctrl->p_def.p, p_def.p_const, elem_size);
3050 for (idx = 0; idx < elems; idx++) {
3051 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
3052 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
3055 if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
3059 mutex_lock(hdl->lock);
3060 list_add_tail(&ctrl->node, &hdl->ctrls);
3061 mutex_unlock(hdl->lock);
3065 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
3066 const struct v4l2_ctrl_config *cfg, void *priv)
3069 struct v4l2_ctrl *ctrl;
3070 const char *name = cfg->name;
3071 const char * const *qmenu = cfg->qmenu;
3072 const s64 *qmenu_int = cfg->qmenu_int;
3073 enum v4l2_ctrl_type type = cfg->type;
3074 u32 flags = cfg->flags;
3077 u64 step = cfg->step;
3081 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
3084 is_menu = (type == V4L2_CTRL_TYPE_MENU ||
3085 type == V4L2_CTRL_TYPE_INTEGER_MENU);
3089 WARN_ON(cfg->menu_skip_mask);
3090 if (type == V4L2_CTRL_TYPE_MENU && !qmenu) {
3091 qmenu = v4l2_ctrl_get_menu(cfg->id);
3092 } else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) {
3093 handler_set_err(hdl, -EINVAL);
3097 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
3099 is_menu ? cfg->menu_skip_mask : step, def,
3100 cfg->dims, cfg->elem_size,
3101 flags, qmenu, qmenu_int, cfg->p_def, priv);
3103 ctrl->is_private = cfg->is_private;
3106 EXPORT_SYMBOL(v4l2_ctrl_new_custom);
3108 /* Helper function for standard non-menu controls */
3109 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
3110 const struct v4l2_ctrl_ops *ops,
3111 u32 id, s64 min, s64 max, u64 step, s64 def)
3114 enum v4l2_ctrl_type type;
3117 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3118 if (type == V4L2_CTRL_TYPE_MENU ||
3119 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
3120 type >= V4L2_CTRL_COMPOUND_TYPES) {
3121 handler_set_err(hdl, -EINVAL);
3124 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3125 min, max, step, def, NULL, 0,
3126 flags, NULL, NULL, ptr_null, NULL);
3128 EXPORT_SYMBOL(v4l2_ctrl_new_std);
3130 /* Helper function for standard menu controls */
3131 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
3132 const struct v4l2_ctrl_ops *ops,
3133 u32 id, u8 _max, u64 mask, u8 _def)
3135 const char * const *qmenu = NULL;
3136 const s64 *qmenu_int = NULL;
3137 unsigned int qmenu_int_len = 0;
3139 enum v4l2_ctrl_type type;
3146 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3148 if (type == V4L2_CTRL_TYPE_MENU)
3149 qmenu = v4l2_ctrl_get_menu(id);
3150 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
3151 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
3153 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
3154 handler_set_err(hdl, -EINVAL);
3157 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3158 0, max, mask, def, NULL, 0,
3159 flags, qmenu, qmenu_int, ptr_null, NULL);
3161 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
3163 /* Helper function for standard menu controls with driver defined menu */
3164 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
3165 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
3166 u64 mask, u8 _def, const char * const *qmenu)
3168 enum v4l2_ctrl_type type;
3176 /* v4l2_ctrl_new_std_menu_items() should only be called for
3177 * standard controls without a standard menu.
3179 if (v4l2_ctrl_get_menu(id)) {
3180 handler_set_err(hdl, -EINVAL);
3184 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3185 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
3186 handler_set_err(hdl, -EINVAL);
3189 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3190 0, max, mask, def, NULL, 0,
3191 flags, qmenu, NULL, ptr_null, NULL);
3194 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
3196 /* Helper function for standard compound controls */
3197 struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,
3198 const struct v4l2_ctrl_ops *ops, u32 id,
3199 const union v4l2_ctrl_ptr p_def)
3202 enum v4l2_ctrl_type type;
3204 s64 min, max, step, def;
3206 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3207 if (type < V4L2_CTRL_COMPOUND_TYPES) {
3208 handler_set_err(hdl, -EINVAL);
3211 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3212 min, max, step, def, NULL, 0,
3213 flags, NULL, NULL, p_def, NULL);
3215 EXPORT_SYMBOL(v4l2_ctrl_new_std_compound);
3217 /* Helper function for standard integer menu controls */
3218 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
3219 const struct v4l2_ctrl_ops *ops,
3220 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
3223 enum v4l2_ctrl_type type;
3230 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3231 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
3232 handler_set_err(hdl, -EINVAL);
3235 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3236 0, max, 0, def, NULL, 0,
3237 flags, NULL, qmenu_int, ptr_null, NULL);
3239 EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
3241 /* Add the controls from another handler to our own. */
3242 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
3243 struct v4l2_ctrl_handler *add,
3244 bool (*filter)(const struct v4l2_ctrl *ctrl),
3245 bool from_other_dev)
3247 struct v4l2_ctrl_ref *ref;
3250 /* Do nothing if either handler is NULL or if they are the same */
3251 if (!hdl || !add || hdl == add)
3255 mutex_lock(add->lock);
3256 list_for_each_entry(ref, &add->ctrl_refs, node) {
3257 struct v4l2_ctrl *ctrl = ref->ctrl;
3259 /* Skip handler-private controls. */
3260 if (ctrl->is_private)
3262 /* And control classes */
3263 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
3265 /* Filter any unwanted controls */
3266 if (filter && !filter(ctrl))
3268 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
3272 mutex_unlock(add->lock);
3275 EXPORT_SYMBOL(v4l2_ctrl_add_handler);
3277 bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
3279 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
3281 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3284 case V4L2_CID_AUDIO_MUTE:
3285 case V4L2_CID_AUDIO_VOLUME:
3286 case V4L2_CID_AUDIO_BALANCE:
3287 case V4L2_CID_AUDIO_BASS:
3288 case V4L2_CID_AUDIO_TREBLE:
3289 case V4L2_CID_AUDIO_LOUDNESS:
3296 EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
3298 /* Cluster controls */
3299 void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
3301 bool has_volatiles = false;
3304 /* The first control is the master control and it must not be NULL */
3305 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
3308 for (i = 0; i < ncontrols; i++) {
3310 controls[i]->cluster = controls;
3311 controls[i]->ncontrols = ncontrols;
3312 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
3313 has_volatiles = true;
3316 controls[0]->has_volatiles = has_volatiles;
3318 EXPORT_SYMBOL(v4l2_ctrl_cluster);
3320 void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
3321 u8 manual_val, bool set_volatile)
3323 struct v4l2_ctrl *master = controls[0];
3327 v4l2_ctrl_cluster(ncontrols, controls);
3328 WARN_ON(ncontrols <= 1);
3329 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
3330 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
3331 master->is_auto = true;
3332 master->has_volatiles = set_volatile;
3333 master->manual_mode_value = manual_val;
3334 master->flags |= V4L2_CTRL_FLAG_UPDATE;
3336 if (!is_cur_manual(master))
3337 flag = V4L2_CTRL_FLAG_INACTIVE |
3338 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
3340 for (i = 1; i < ncontrols; i++)
3342 controls[i]->flags |= flag;
3344 EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
3346 /* Activate/deactivate a control. */
3347 void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
3349 /* invert since the actual flag is called 'inactive' */
3350 bool inactive = !active;
3357 /* set V4L2_CTRL_FLAG_INACTIVE */
3358 old = test_and_set_bit(4, &ctrl->flags);
3360 /* clear V4L2_CTRL_FLAG_INACTIVE */
3361 old = test_and_clear_bit(4, &ctrl->flags);
3362 if (old != inactive)
3363 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
3365 EXPORT_SYMBOL(v4l2_ctrl_activate);
3367 void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
3374 lockdep_assert_held(ctrl->handler->lock);
3377 /* set V4L2_CTRL_FLAG_GRABBED */
3378 old = test_and_set_bit(1, &ctrl->flags);
3380 /* clear V4L2_CTRL_FLAG_GRABBED */
3381 old = test_and_clear_bit(1, &ctrl->flags);
3383 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
3385 EXPORT_SYMBOL(__v4l2_ctrl_grab);
3387 /* Log the control name and value */
3388 static void log_ctrl(const struct v4l2_ctrl *ctrl,
3389 const char *prefix, const char *colon)
3391 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
3393 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
3396 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
3398 ctrl->type_ops->log(ctrl);
3400 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
3401 V4L2_CTRL_FLAG_GRABBED |
3402 V4L2_CTRL_FLAG_VOLATILE)) {
3403 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
3404 pr_cont(" inactive");
3405 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
3406 pr_cont(" grabbed");
3407 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
3408 pr_cont(" volatile");
3413 /* Log all controls owned by the handler */
3414 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
3417 struct v4l2_ctrl *ctrl;
3418 const char *colon = "";
3425 len = strlen(prefix);
3426 if (len && prefix[len - 1] != ' ')
3428 mutex_lock(hdl->lock);
3429 list_for_each_entry(ctrl, &hdl->ctrls, node)
3430 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
3431 log_ctrl(ctrl, prefix, colon);
3432 mutex_unlock(hdl->lock);
3434 EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
3436 int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
3438 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
3441 EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
3443 /* Call s_ctrl for all controls owned by the handler */
3444 int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
3446 struct v4l2_ctrl *ctrl;
3452 lockdep_assert_held(hdl->lock);
3454 list_for_each_entry(ctrl, &hdl->ctrls, node)
3457 list_for_each_entry(ctrl, &hdl->ctrls, node) {
3458 struct v4l2_ctrl *master = ctrl->cluster[0];
3461 /* Skip if this control was already handled by a cluster. */
3462 /* Skip button controls and read-only controls. */
3463 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
3464 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
3467 for (i = 0; i < master->ncontrols; i++) {
3468 if (master->cluster[i]) {
3469 cur_to_new(master->cluster[i]);
3470 master->cluster[i]->is_new = 1;
3471 master->cluster[i]->done = true;
3474 ret = call_op(master, s_ctrl);
3481 EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
3483 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
3490 mutex_lock(hdl->lock);
3491 ret = __v4l2_ctrl_handler_setup(hdl);
3492 mutex_unlock(hdl->lock);
3496 EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
3498 /* Implement VIDIOC_QUERY_EXT_CTRL */
3499 int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
3501 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
3502 u32 id = qc->id & V4L2_CTRL_ID_MASK;
3503 struct v4l2_ctrl_ref *ref;
3504 struct v4l2_ctrl *ctrl;
3509 mutex_lock(hdl->lock);
3511 /* Try to find it */
3512 ref = find_ref(hdl, id);
3514 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
3516 /* Match any control that is not hidden */
3520 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
3521 /* Match any hidden control */
3523 } else if ((qc->id & next_flags) == next_flags) {
3524 /* Match any control, compound or not */
3528 /* Find the next control with ID > qc->id */
3530 /* Did we reach the end of the control list? */
3531 if (id >= node2id(hdl->ctrl_refs.prev)) {
3532 ref = NULL; /* Yes, so there is no next control */
3534 /* We found a control with the given ID, so just get
3535 the next valid one in the list. */
3536 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
3537 is_compound = ref->ctrl->is_array ||
3538 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
3539 if (id < ref->ctrl->id &&
3540 (is_compound & mask) == match)
3543 if (&ref->node == &hdl->ctrl_refs)
3546 /* No control with the given ID exists, so start
3547 searching for the next largest ID. We know there
3548 is one, otherwise the first 'if' above would have
3550 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
3551 is_compound = ref->ctrl->is_array ||
3552 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
3553 if (id < ref->ctrl->id &&
3554 (is_compound & mask) == match)
3557 if (&ref->node == &hdl->ctrl_refs)
3561 mutex_unlock(hdl->lock);
3567 memset(qc, 0, sizeof(*qc));
3568 if (id >= V4L2_CID_PRIVATE_BASE)
3572 strscpy(qc->name, ctrl->name, sizeof(qc->name));
3573 qc->flags = user_flags(ctrl);
3574 qc->type = ctrl->type;
3575 qc->elem_size = ctrl->elem_size;
3576 qc->elems = ctrl->elems;
3577 qc->nr_of_dims = ctrl->nr_of_dims;
3578 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
3579 qc->minimum = ctrl->minimum;
3580 qc->maximum = ctrl->maximum;
3581 qc->default_value = ctrl->default_value;
3582 if (ctrl->type == V4L2_CTRL_TYPE_MENU
3583 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
3586 qc->step = ctrl->step;
3589 EXPORT_SYMBOL(v4l2_query_ext_ctrl);
3591 /* Implement VIDIOC_QUERYCTRL */
3592 int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
3594 struct v4l2_query_ext_ctrl qec = { qc->id };
3597 rc = v4l2_query_ext_ctrl(hdl, &qec);
3602 qc->type = qec.type;
3603 qc->flags = qec.flags;
3604 strscpy(qc->name, qec.name, sizeof(qc->name));
3606 case V4L2_CTRL_TYPE_INTEGER:
3607 case V4L2_CTRL_TYPE_BOOLEAN:
3608 case V4L2_CTRL_TYPE_MENU:
3609 case V4L2_CTRL_TYPE_INTEGER_MENU:
3610 case V4L2_CTRL_TYPE_STRING:
3611 case V4L2_CTRL_TYPE_BITMASK:
3612 qc->minimum = qec.minimum;
3613 qc->maximum = qec.maximum;
3614 qc->step = qec.step;
3615 qc->default_value = qec.default_value;
3621 qc->default_value = 0;
3626 EXPORT_SYMBOL(v4l2_queryctrl);
3628 /* Implement VIDIOC_QUERYMENU */
3629 int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
3631 struct v4l2_ctrl *ctrl;
3634 ctrl = v4l2_ctrl_find(hdl, qm->id);
3640 switch (ctrl->type) {
3641 case V4L2_CTRL_TYPE_MENU:
3642 if (ctrl->qmenu == NULL)
3645 case V4L2_CTRL_TYPE_INTEGER_MENU:
3646 if (ctrl->qmenu_int == NULL)
3653 if (i < ctrl->minimum || i > ctrl->maximum)
3656 /* Use mask to see if this menu item should be skipped */
3657 if (ctrl->menu_skip_mask & (1ULL << i))
3659 /* Empty menu items should also be skipped */
3660 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
3661 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
3663 strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
3665 qm->value = ctrl->qmenu_int[i];
3669 EXPORT_SYMBOL(v4l2_querymenu);
3671 static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
3672 const struct v4l2_ctrl_handler *from)
3674 struct v4l2_ctrl_ref *ref;
3677 if (WARN_ON(!hdl || hdl == from))
3683 WARN_ON(hdl->lock != &hdl->_lock);
3685 mutex_lock(from->lock);
3686 list_for_each_entry(ref, &from->ctrl_refs, node) {
3687 struct v4l2_ctrl *ctrl = ref->ctrl;
3688 struct v4l2_ctrl_ref *new_ref;
3690 /* Skip refs inherited from other devices */
3691 if (ref->from_other_dev)
3693 err = handler_new_ref(hdl, ctrl, &new_ref, false, true);
3697 mutex_unlock(from->lock);
3701 static void v4l2_ctrl_request_queue(struct media_request_object *obj)
3703 struct v4l2_ctrl_handler *hdl =
3704 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3705 struct v4l2_ctrl_handler *main_hdl = obj->priv;
3707 mutex_lock(main_hdl->lock);
3708 list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued);
3709 hdl->request_is_queued = true;
3710 mutex_unlock(main_hdl->lock);
3713 static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
3715 struct v4l2_ctrl_handler *hdl =
3716 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3717 struct v4l2_ctrl_handler *main_hdl = obj->priv;
3719 mutex_lock(main_hdl->lock);
3720 list_del_init(&hdl->requests);
3721 if (hdl->request_is_queued) {
3722 list_del_init(&hdl->requests_queued);
3723 hdl->request_is_queued = false;
3725 mutex_unlock(main_hdl->lock);
3728 static void v4l2_ctrl_request_release(struct media_request_object *obj)
3730 struct v4l2_ctrl_handler *hdl =
3731 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3733 v4l2_ctrl_handler_free(hdl);
3737 static const struct media_request_object_ops req_ops = {
3738 .queue = v4l2_ctrl_request_queue,
3739 .unbind = v4l2_ctrl_request_unbind,
3740 .release = v4l2_ctrl_request_release,
3743 struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
3744 struct v4l2_ctrl_handler *parent)
3746 struct media_request_object *obj;
3748 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING &&
3749 req->state != MEDIA_REQUEST_STATE_QUEUED))
3752 obj = media_request_object_find(req, &req_ops, parent);
3754 return container_of(obj, struct v4l2_ctrl_handler, req_obj);
3757 EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find);
3760 v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
3762 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
3764 return (ref && ref->valid_p_req) ? ref->ctrl : NULL;
3766 EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find);
3768 static int v4l2_ctrl_request_bind(struct media_request *req,
3769 struct v4l2_ctrl_handler *hdl,
3770 struct v4l2_ctrl_handler *from)
3774 ret = v4l2_ctrl_request_clone(hdl, from);
3777 ret = media_request_object_bind(req, &req_ops,
3778 from, false, &hdl->req_obj);
3780 mutex_lock(from->lock);
3781 list_add_tail(&hdl->requests, &from->requests);
3782 mutex_unlock(from->lock);
3788 /* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
3790 It is not a fully atomic operation, just best-effort only. After all, if
3791 multiple controls have to be set through multiple i2c writes (for example)
3792 then some initial writes may succeed while others fail. Thus leaving the
3793 system in an inconsistent state. The question is how much effort you are
3794 willing to spend on trying to make something atomic that really isn't.
3796 From the point of view of an application the main requirement is that
3797 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
3798 error should be returned without actually affecting any controls.
3800 If all the values are correct, then it is acceptable to just give up
3801 in case of low-level errors.
3803 It is important though that the application can tell when only a partial
3804 configuration was done. The way we do that is through the error_idx field
3805 of struct v4l2_ext_controls: if that is equal to the count field then no
3806 controls were affected. Otherwise all controls before that index were
3807 successful in performing their 'get' or 'set' operation, the control at
3808 the given index failed, and you don't know what happened with the controls
3809 after the failed one. Since if they were part of a control cluster they
3810 could have been successfully processed (if a cluster member was encountered
3811 at index < error_idx), they could have failed (if a cluster member was at
3812 error_idx), or they may not have been processed yet (if the first cluster
3813 member appeared after error_idx).
3815 It is all fairly theoretical, though. In practice all you can do is to
3816 bail out. If error_idx == count, then it is an application bug. If
3817 error_idx < count then it is only an application bug if the error code was
3818 EBUSY. That usually means that something started streaming just when you
3819 tried to set the controls. In all other cases it is a driver/hardware
3820 problem and all you can do is to retry or bail out.
3822 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
3823 never modifies controls the error_idx is just set to whatever control
3824 has an invalid value.
3827 /* Prepare for the extended g/s/try functions.
3828 Find the controls in the control array and do some basic checks. */
3829 static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
3830 struct v4l2_ext_controls *cs,
3831 struct v4l2_ctrl_helper *helpers,
3832 struct video_device *vdev,
3835 struct v4l2_ctrl_helper *h;
3836 bool have_clusters = false;
3839 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3840 struct v4l2_ext_control *c = &cs->controls[i];
3841 struct v4l2_ctrl_ref *ref;
3842 struct v4l2_ctrl *ctrl;
3843 u32 id = c->id & V4L2_CTRL_ID_MASK;
3848 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
3849 cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
3850 V4L2_CTRL_ID2WHICH(id) != cs->which) {
3852 "invalid which 0x%x or control id 0x%x\n",
3857 /* Old-style private controls are not allowed for
3858 extended controls */
3859 if (id >= V4L2_CID_PRIVATE_BASE) {
3861 "old-style private controls not allowed\n");
3864 ref = find_ref_lock(hdl, id);
3866 dprintk(vdev, "cannot find control id 0x%x\n", id);
3871 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) {
3872 dprintk(vdev, "control id 0x%x is disabled\n", id);
3876 if (ctrl->cluster[0]->ncontrols > 1)
3877 have_clusters = true;
3878 if (ctrl->cluster[0] != ctrl)
3879 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
3880 if (ctrl->is_ptr && !ctrl->is_string) {
3881 unsigned tot_size = ctrl->elems * ctrl->elem_size;
3883 if (c->size < tot_size) {
3885 * In the get case the application first
3886 * queries to obtain the size of the control.
3893 "pointer control id 0x%x size too small, %d bytes but %d bytes needed\n",
3894 id, c->size, tot_size);
3899 /* Store the ref to the master control of the cluster */
3901 /* Initially set next to 0, meaning that there is no other
3902 control in this helper array belonging to the same
3907 /* We are done if there were no controls that belong to a multi-
3912 /* The code below figures out in O(n) time which controls in the list
3913 belong to the same cluster. */
3915 /* This has to be done with the handler lock taken. */
3916 mutex_lock(hdl->lock);
3918 /* First zero the helper field in the master control references */
3919 for (i = 0; i < cs->count; i++)
3920 helpers[i].mref->helper = NULL;
3921 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3922 struct v4l2_ctrl_ref *mref = h->mref;
3924 /* If the mref->helper is set, then it points to an earlier
3925 helper that belongs to the same cluster. */
3927 /* Set the next field of mref->helper to the current
3928 index: this means that that earlier helper now
3929 points to the next helper in the same cluster. */
3930 mref->helper->next = i;
3931 /* mref should be set only for the first helper in the
3932 cluster, clear the others. */
3935 /* Point the mref helper to the current helper struct. */
3938 mutex_unlock(hdl->lock);
3942 /* Handles the corner case where cs->count == 0. It checks whether the
3943 specified control class exists. If that class ID is 0, then it checks
3944 whether there are any controls at all. */
3945 static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
3947 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL ||
3948 which == V4L2_CTRL_WHICH_REQUEST_VAL)
3950 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
3954 * Get extended controls. Allocates the helpers array if needed.
3956 * Note that v4l2_g_ext_ctrls_common() with 'which' set to
3957 * V4L2_CTRL_WHICH_REQUEST_VAL is only called if the request was
3958 * completed, and in that case valid_p_req is true for all controls.
3960 static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
3961 struct v4l2_ext_controls *cs,
3962 struct video_device *vdev)
3964 struct v4l2_ctrl_helper helper[4];
3965 struct v4l2_ctrl_helper *helpers = helper;
3968 bool is_default, is_request;
3970 is_default = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
3971 is_request = (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL);
3973 cs->error_idx = cs->count;
3974 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
3980 return class_check(hdl, cs->which);
3982 if (cs->count > ARRAY_SIZE(helper)) {
3983 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3985 if (helpers == NULL)
3989 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, true);
3990 cs->error_idx = cs->count;
3992 for (i = 0; !ret && i < cs->count; i++)
3993 if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
3996 for (i = 0; !ret && i < cs->count; i++) {
3997 struct v4l2_ctrl *master;
3998 bool is_volatile = false;
4001 if (helpers[i].mref == NULL)
4004 master = helpers[i].mref->ctrl;
4007 v4l2_ctrl_lock(master);
4010 * g_volatile_ctrl will update the new control values.
4011 * This makes no sense for V4L2_CTRL_WHICH_DEF_VAL and
4012 * V4L2_CTRL_WHICH_REQUEST_VAL. In the case of requests
4013 * it is v4l2_ctrl_request_complete() that copies the
4014 * volatile controls at the time of request completion
4015 * to the request, so you don't want to do that again.
4017 if (!is_default && !is_request &&
4018 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
4019 (master->has_volatiles && !is_cur_manual(master)))) {
4020 for (j = 0; j < master->ncontrols; j++)
4021 cur_to_new(master->cluster[j]);
4022 ret = call_op(master, g_volatile_ctrl);
4027 v4l2_ctrl_unlock(master);
4032 * Copy the default value (if is_default is true), the
4033 * request value (if is_request is true and p_req is valid),
4034 * the new volatile value (if is_volatile is true) or the
4038 struct v4l2_ctrl_ref *ref = helpers[idx].ref;
4041 ret = def_to_user(cs->controls + idx, ref->ctrl);
4042 else if (is_request && ref->valid_p_req)
4043 ret = req_to_user(cs->controls + idx, ref);
4044 else if (is_volatile)
4045 ret = new_to_user(cs->controls + idx, ref->ctrl);
4047 ret = cur_to_user(cs->controls + idx, ref->ctrl);
4048 idx = helpers[idx].next;
4049 } while (!ret && idx);
4051 v4l2_ctrl_unlock(master);
4054 if (cs->count > ARRAY_SIZE(helper))
4059 static struct media_request_object *
4060 v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
4061 struct media_request *req, bool set)
4063 struct media_request_object *obj;
4064 struct v4l2_ctrl_handler *new_hdl;
4068 return ERR_CAST(req);
4070 if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
4071 return ERR_PTR(-EBUSY);
4073 obj = media_request_object_find(req, &req_ops, hdl);
4077 return ERR_PTR(-ENOENT);
4079 new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
4081 return ERR_PTR(-ENOMEM);
4083 obj = &new_hdl->req_obj;
4084 ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
4086 ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
4090 return ERR_PTR(ret);
4093 media_request_object_get(obj);
4097 int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
4098 struct media_device *mdev, struct v4l2_ext_controls *cs)
4100 struct media_request_object *obj = NULL;
4101 struct media_request *req = NULL;
4104 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
4105 if (!mdev || cs->request_fd < 0)
4108 req = media_request_get_by_fd(mdev, cs->request_fd);
4110 return PTR_ERR(req);
4112 if (req->state != MEDIA_REQUEST_STATE_COMPLETE) {
4113 media_request_put(req);
4117 ret = media_request_lock_for_access(req);
4119 media_request_put(req);
4123 obj = v4l2_ctrls_find_req_obj(hdl, req, false);
4125 media_request_unlock_for_access(req);
4126 media_request_put(req);
4127 return PTR_ERR(obj);
4130 hdl = container_of(obj, struct v4l2_ctrl_handler,
4134 ret = v4l2_g_ext_ctrls_common(hdl, cs, vdev);
4137 media_request_unlock_for_access(req);
4138 media_request_object_put(obj);
4139 media_request_put(req);
4143 EXPORT_SYMBOL(v4l2_g_ext_ctrls);
4145 /* Helper function to get a single control */
4146 static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
4148 struct v4l2_ctrl *master = ctrl->cluster[0];
4152 /* Compound controls are not supported. The new_to_user() and
4153 * cur_to_user() calls below would need to be modified not to access
4154 * userspace memory when called from get_ctrl().
4156 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
4159 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
4162 v4l2_ctrl_lock(master);
4163 /* g_volatile_ctrl will update the current control values */
4164 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
4165 for (i = 0; i < master->ncontrols; i++)
4166 cur_to_new(master->cluster[i]);
4167 ret = call_op(master, g_volatile_ctrl);
4168 new_to_user(c, ctrl);
4170 cur_to_user(c, ctrl);
4172 v4l2_ctrl_unlock(master);
4176 int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
4178 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
4179 struct v4l2_ext_control c;
4182 if (ctrl == NULL || !ctrl->is_int)
4184 ret = get_ctrl(ctrl, &c);
4185 control->value = c.value;
4188 EXPORT_SYMBOL(v4l2_g_ctrl);
4190 s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
4192 struct v4l2_ext_control c;
4194 /* It's a driver bug if this happens. */
4195 if (WARN_ON(!ctrl->is_int))
4201 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
4203 s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
4205 struct v4l2_ext_control c;
4207 /* It's a driver bug if this happens. */
4208 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
4214 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
4217 /* Core function that calls try/s_ctrl and ensures that the new value is
4218 copied to the current value on a set.
4219 Must be called with ctrl->handler->lock held. */
4220 static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
4221 bool set, u32 ch_flags)
4227 /* Go through the cluster and either validate the new value or
4228 (if no new value was set), copy the current value to the new
4229 value, ensuring a consistent view for the control ops when
4231 for (i = 0; i < master->ncontrols; i++) {
4232 struct v4l2_ctrl *ctrl = master->cluster[i];
4237 if (!ctrl->is_new) {
4241 /* Check again: it may have changed since the
4242 previous check in try_or_set_ext_ctrls(). */
4243 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
4247 ret = call_op(master, try_ctrl);
4249 /* Don't set if there is no change */
4250 if (ret || !set || !cluster_changed(master))
4252 ret = call_op(master, s_ctrl);
4256 /* If OK, then make the new values permanent. */
4257 update_flag = is_cur_manual(master) != is_new_manual(master);
4259 for (i = 0; i < master->ncontrols; i++) {
4261 * If we switch from auto to manual mode, and this cluster
4262 * contains volatile controls, then all non-master controls
4263 * have to be marked as changed. The 'new' value contains
4264 * the volatile value (obtained by update_from_auto_cluster),
4265 * which now has to become the current value.
4267 if (i && update_flag && is_new_manual(master) &&
4268 master->has_volatiles && master->cluster[i])
4269 master->cluster[i]->has_changed = true;
4271 new_to_cur(fh, master->cluster[i], ch_flags |
4272 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
4277 /* Validate controls. */
4278 static int validate_ctrls(struct v4l2_ext_controls *cs,
4279 struct v4l2_ctrl_helper *helpers,
4280 struct video_device *vdev,
4286 cs->error_idx = cs->count;
4287 for (i = 0; i < cs->count; i++) {
4288 struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
4289 union v4l2_ctrl_ptr p_new;
4293 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) {
4295 "control id 0x%x is read-only\n",
4299 /* This test is also done in try_set_control_cluster() which
4300 is called in atomic context, so that has the final say,
4301 but it makes sense to do an up-front check as well. Once
4302 an error occurs in try_set_control_cluster() some other
4303 controls may have been set already and we want to do a
4304 best-effort to avoid that. */
4305 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) {
4307 "control id 0x%x is grabbed, cannot set\n",
4312 * Skip validation for now if the payload needs to be copied
4313 * from userspace into kernelspace. We'll validate those later.
4317 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4318 p_new.p_s64 = &cs->controls[i].value64;
4320 p_new.p_s32 = &cs->controls[i].value;
4321 ret = validate_new(ctrl, p_new);
4328 /* Obtain the current volatile values of an autocluster and mark them
4330 static void update_from_auto_cluster(struct v4l2_ctrl *master)
4334 for (i = 1; i < master->ncontrols; i++)
4335 cur_to_new(master->cluster[i]);
4336 if (!call_op(master, g_volatile_ctrl))
4337 for (i = 1; i < master->ncontrols; i++)
4338 if (master->cluster[i])
4339 master->cluster[i]->is_new = 1;
4342 /* Try or try-and-set controls */
4343 static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
4344 struct v4l2_ctrl_handler *hdl,
4345 struct v4l2_ext_controls *cs,
4346 struct video_device *vdev, bool set)
4348 struct v4l2_ctrl_helper helper[4];
4349 struct v4l2_ctrl_helper *helpers = helper;
4353 cs->error_idx = cs->count;
4355 /* Default value cannot be changed */
4356 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL) {
4357 dprintk(vdev, "%s: cannot change default value\n",
4358 video_device_node_name(vdev));
4362 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
4365 dprintk(vdev, "%s: invalid null control handler\n",
4366 video_device_node_name(vdev));
4371 return class_check(hdl, cs->which);
4373 if (cs->count > ARRAY_SIZE(helper)) {
4374 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
4379 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, false);
4381 ret = validate_ctrls(cs, helpers, vdev, set);
4383 cs->error_idx = cs->count;
4384 for (i = 0; !ret && i < cs->count; i++) {
4385 struct v4l2_ctrl *master;
4388 if (helpers[i].mref == NULL)
4392 master = helpers[i].mref->ctrl;
4393 v4l2_ctrl_lock(master);
4395 /* Reset the 'is_new' flags of the cluster */
4396 for (j = 0; j < master->ncontrols; j++)
4397 if (master->cluster[j])
4398 master->cluster[j]->is_new = 0;
4400 /* For volatile autoclusters that are currently in auto mode
4401 we need to discover if it will be set to manual mode.
4402 If so, then we have to copy the current volatile values
4403 first since those will become the new manual values (which
4404 may be overwritten by explicit new values from this set
4406 if (master->is_auto && master->has_volatiles &&
4407 !is_cur_manual(master)) {
4408 /* Pick an initial non-manual value */
4409 s32 new_auto_val = master->manual_mode_value + 1;
4413 /* Check if the auto control is part of the
4414 list, and remember the new value. */
4415 if (helpers[tmp_idx].ref->ctrl == master)
4416 new_auto_val = cs->controls[tmp_idx].value;
4417 tmp_idx = helpers[tmp_idx].next;
4419 /* If the new value == the manual value, then copy
4420 the current volatile values. */
4421 if (new_auto_val == master->manual_mode_value)
4422 update_from_auto_cluster(master);
4425 /* Copy the new caller-supplied control values.
4426 user_to_new() sets 'is_new' to 1. */
4428 struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;
4430 ret = user_to_new(cs->controls + idx, ctrl);
4431 if (!ret && ctrl->is_ptr) {
4432 ret = validate_new(ctrl, ctrl->p_new);
4435 "failed to validate control %s (%d)\n",
4436 v4l2_ctrl_get_name(ctrl->id), ret);
4438 idx = helpers[idx].next;
4439 } while (!ret && idx);
4442 ret = try_or_set_cluster(fh, master,
4443 !hdl->req_obj.req && set, 0);
4444 if (!ret && hdl->req_obj.req && set) {
4445 for (j = 0; j < master->ncontrols; j++) {
4446 struct v4l2_ctrl_ref *ref =
4447 find_ref(hdl, master->cluster[j]->id);
4453 /* Copy the new values back to userspace. */
4457 ret = new_to_user(cs->controls + idx,
4458 helpers[idx].ref->ctrl);
4459 idx = helpers[idx].next;
4460 } while (!ret && idx);
4462 v4l2_ctrl_unlock(master);
4465 if (cs->count > ARRAY_SIZE(helper))
4470 static int try_set_ext_ctrls(struct v4l2_fh *fh,
4471 struct v4l2_ctrl_handler *hdl,
4472 struct video_device *vdev,
4473 struct media_device *mdev,
4474 struct v4l2_ext_controls *cs, bool set)
4476 struct media_request_object *obj = NULL;
4477 struct media_request *req = NULL;
4480 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
4482 dprintk(vdev, "%s: missing media device\n",
4483 video_device_node_name(vdev));
4487 if (cs->request_fd < 0) {
4488 dprintk(vdev, "%s: invalid request fd %d\n",
4489 video_device_node_name(vdev), cs->request_fd);
4493 req = media_request_get_by_fd(mdev, cs->request_fd);
4495 dprintk(vdev, "%s: cannot find request fd %d\n",
4496 video_device_node_name(vdev), cs->request_fd);
4497 return PTR_ERR(req);
4500 ret = media_request_lock_for_update(req);
4502 dprintk(vdev, "%s: cannot lock request fd %d\n",
4503 video_device_node_name(vdev), cs->request_fd);
4504 media_request_put(req);
4508 obj = v4l2_ctrls_find_req_obj(hdl, req, set);
4511 "%s: cannot find request object for request fd %d\n",
4512 video_device_node_name(vdev),
4514 media_request_unlock_for_update(req);
4515 media_request_put(req);
4516 return PTR_ERR(obj);
4518 hdl = container_of(obj, struct v4l2_ctrl_handler,
4522 ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set);
4525 "%s: try_set_ext_ctrls_common failed (%d)\n",
4526 video_device_node_name(vdev), ret);
4529 media_request_unlock_for_update(req);
4530 media_request_object_put(obj);
4531 media_request_put(req);
4537 int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
4538 struct video_device *vdev,
4539 struct media_device *mdev,
4540 struct v4l2_ext_controls *cs)
4542 return try_set_ext_ctrls(NULL, hdl, vdev, mdev, cs, false);
4544 EXPORT_SYMBOL(v4l2_try_ext_ctrls);
4546 int v4l2_s_ext_ctrls(struct v4l2_fh *fh,
4547 struct v4l2_ctrl_handler *hdl,
4548 struct video_device *vdev,
4549 struct media_device *mdev,
4550 struct v4l2_ext_controls *cs)
4552 return try_set_ext_ctrls(fh, hdl, vdev, mdev, cs, true);
4554 EXPORT_SYMBOL(v4l2_s_ext_ctrls);
4556 /* Helper function for VIDIOC_S_CTRL compatibility */
4557 static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
4559 struct v4l2_ctrl *master = ctrl->cluster[0];
4563 /* Reset the 'is_new' flags of the cluster */
4564 for (i = 0; i < master->ncontrols; i++)
4565 if (master->cluster[i])
4566 master->cluster[i]->is_new = 0;
4568 ret = validate_new(ctrl, ctrl->p_new);
4572 /* For autoclusters with volatiles that are switched from auto to
4573 manual mode we have to update the current volatile values since
4574 those will become the initial manual values after such a switch. */
4575 if (master->is_auto && master->has_volatiles && ctrl == master &&
4576 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
4577 update_from_auto_cluster(master);
4580 return try_or_set_cluster(fh, master, true, ch_flags);
4583 /* Helper function for VIDIOC_S_CTRL compatibility */
4584 static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
4585 struct v4l2_ext_control *c)
4589 v4l2_ctrl_lock(ctrl);
4590 user_to_new(c, ctrl);
4591 ret = set_ctrl(fh, ctrl, 0);
4593 cur_to_user(c, ctrl);
4594 v4l2_ctrl_unlock(ctrl);
4598 int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
4599 struct v4l2_control *control)
4601 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
4602 struct v4l2_ext_control c = { control->id };
4605 if (ctrl == NULL || !ctrl->is_int)
4608 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
4611 c.value = control->value;
4612 ret = set_ctrl_lock(fh, ctrl, &c);
4613 control->value = c.value;
4616 EXPORT_SYMBOL(v4l2_s_ctrl);
4618 int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
4620 lockdep_assert_held(ctrl->handler->lock);
4622 /* It's a driver bug if this happens. */
4623 if (WARN_ON(!ctrl->is_int))
4626 return set_ctrl(NULL, ctrl, 0);
4628 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
4630 int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
4632 lockdep_assert_held(ctrl->handler->lock);
4634 /* It's a driver bug if this happens. */
4635 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
4637 *ctrl->p_new.p_s64 = val;
4638 return set_ctrl(NULL, ctrl, 0);
4640 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
4642 int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
4644 lockdep_assert_held(ctrl->handler->lock);
4646 /* It's a driver bug if this happens. */
4647 if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING))
4649 strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
4650 return set_ctrl(NULL, ctrl, 0);
4652 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
4654 int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
4655 enum v4l2_ctrl_type type, const void *p)
4657 lockdep_assert_held(ctrl->handler->lock);
4659 /* It's a driver bug if this happens. */
4660 if (WARN_ON(ctrl->type != type))
4662 memcpy(ctrl->p_new.p, p, ctrl->elems * ctrl->elem_size);
4663 return set_ctrl(NULL, ctrl, 0);
4665 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_compound);
4667 void v4l2_ctrl_request_complete(struct media_request *req,
4668 struct v4l2_ctrl_handler *main_hdl)
4670 struct media_request_object *obj;
4671 struct v4l2_ctrl_handler *hdl;
4672 struct v4l2_ctrl_ref *ref;
4674 if (!req || !main_hdl)
4678 * Note that it is valid if nothing was found. It means
4679 * that this request doesn't have any controls and so just
4680 * wants to leave the controls unchanged.
4682 obj = media_request_object_find(req, &req_ops, main_hdl);
4685 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
4687 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
4688 struct v4l2_ctrl *ctrl = ref->ctrl;
4689 struct v4l2_ctrl *master = ctrl->cluster[0];
4692 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
4693 v4l2_ctrl_lock(master);
4694 /* g_volatile_ctrl will update the current control values */
4695 for (i = 0; i < master->ncontrols; i++)
4696 cur_to_new(master->cluster[i]);
4697 call_op(master, g_volatile_ctrl);
4699 v4l2_ctrl_unlock(master);
4702 if (ref->valid_p_req)
4705 /* Copy the current control value into the request */
4706 v4l2_ctrl_lock(ctrl);
4708 v4l2_ctrl_unlock(ctrl);
4711 mutex_lock(main_hdl->lock);
4712 WARN_ON(!hdl->request_is_queued);
4713 list_del_init(&hdl->requests_queued);
4714 hdl->request_is_queued = false;
4715 mutex_unlock(main_hdl->lock);
4716 media_request_object_complete(obj);
4717 media_request_object_put(obj);
4719 EXPORT_SYMBOL(v4l2_ctrl_request_complete);
4721 int v4l2_ctrl_request_setup(struct media_request *req,
4722 struct v4l2_ctrl_handler *main_hdl)
4724 struct media_request_object *obj;
4725 struct v4l2_ctrl_handler *hdl;
4726 struct v4l2_ctrl_ref *ref;
4729 if (!req || !main_hdl)
4732 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
4736 * Note that it is valid if nothing was found. It means
4737 * that this request doesn't have any controls and so just
4738 * wants to leave the controls unchanged.
4740 obj = media_request_object_find(req, &req_ops, main_hdl);
4743 if (obj->completed) {
4744 media_request_object_put(obj);
4747 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
4749 list_for_each_entry(ref, &hdl->ctrl_refs, node)
4750 ref->req_done = false;
4752 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
4753 struct v4l2_ctrl *ctrl = ref->ctrl;
4754 struct v4l2_ctrl *master = ctrl->cluster[0];
4755 bool have_new_data = false;
4759 * Skip if this control was already handled by a cluster.
4760 * Skip button controls and read-only controls.
4762 if (ref->req_done || (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
4765 v4l2_ctrl_lock(master);
4766 for (i = 0; i < master->ncontrols; i++) {
4767 if (master->cluster[i]) {
4768 struct v4l2_ctrl_ref *r =
4769 find_ref(hdl, master->cluster[i]->id);
4771 if (r->valid_p_req) {
4772 have_new_data = true;
4777 if (!have_new_data) {
4778 v4l2_ctrl_unlock(master);
4782 for (i = 0; i < master->ncontrols; i++) {
4783 if (master->cluster[i]) {
4784 struct v4l2_ctrl_ref *r =
4785 find_ref(hdl, master->cluster[i]->id);
4788 master->cluster[i]->is_new = 1;
4793 * For volatile autoclusters that are currently in auto mode
4794 * we need to discover if it will be set to manual mode.
4795 * If so, then we have to copy the current volatile values
4796 * first since those will become the new manual values (which
4797 * may be overwritten by explicit new values from this set
4800 if (master->is_auto && master->has_volatiles &&
4801 !is_cur_manual(master)) {
4802 s32 new_auto_val = *master->p_new.p_s32;
4805 * If the new value == the manual value, then copy
4806 * the current volatile values.
4808 if (new_auto_val == master->manual_mode_value)
4809 update_from_auto_cluster(master);
4812 ret = try_or_set_cluster(NULL, master, true, 0);
4813 v4l2_ctrl_unlock(master);
4819 media_request_object_put(obj);
4822 EXPORT_SYMBOL(v4l2_ctrl_request_setup);
4824 void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
4828 if (notify == NULL) {
4829 ctrl->call_notify = 0;
4832 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
4834 ctrl->handler->notify = notify;
4835 ctrl->handler->notify_priv = priv;
4836 ctrl->call_notify = 1;
4838 EXPORT_SYMBOL(v4l2_ctrl_notify);
4840 int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
4841 s64 min, s64 max, u64 step, s64 def)
4844 bool range_changed = false;
4847 lockdep_assert_held(ctrl->handler->lock);
4849 switch (ctrl->type) {
4850 case V4L2_CTRL_TYPE_INTEGER:
4851 case V4L2_CTRL_TYPE_INTEGER64:
4852 case V4L2_CTRL_TYPE_BOOLEAN:
4853 case V4L2_CTRL_TYPE_MENU:
4854 case V4L2_CTRL_TYPE_INTEGER_MENU:
4855 case V4L2_CTRL_TYPE_BITMASK:
4856 case V4L2_CTRL_TYPE_U8:
4857 case V4L2_CTRL_TYPE_U16:
4858 case V4L2_CTRL_TYPE_U32:
4861 ret = check_range(ctrl->type, min, max, step, def);
4868 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
4869 (ctrl->step != step) || ctrl->default_value != def) {
4870 range_changed = true;
4871 ctrl->minimum = min;
4872 ctrl->maximum = max;
4874 ctrl->default_value = def;
4877 if (validate_new(ctrl, ctrl->p_new)) {
4878 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4879 *ctrl->p_new.p_s64 = def;
4881 *ctrl->p_new.p_s32 = def;
4884 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4885 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
4887 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
4889 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
4890 else if (range_changed)
4891 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
4894 EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
4896 static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
4898 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4903 v4l2_ctrl_lock(ctrl);
4904 list_add_tail(&sev->node, &ctrl->ev_subs);
4905 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
4906 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
4907 struct v4l2_event ev;
4908 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
4910 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
4911 changes |= V4L2_EVENT_CTRL_CH_VALUE;
4912 fill_event(&ev, ctrl, changes);
4913 /* Mark the queue as active, allowing this initial
4914 event to be accepted. */
4916 v4l2_event_queue_fh(sev->fh, &ev);
4918 v4l2_ctrl_unlock(ctrl);
4922 static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
4924 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4929 v4l2_ctrl_lock(ctrl);
4930 list_del(&sev->node);
4931 v4l2_ctrl_unlock(ctrl);
4934 void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
4936 u32 old_changes = old->u.ctrl.changes;
4938 old->u.ctrl = new->u.ctrl;
4939 old->u.ctrl.changes |= old_changes;
4941 EXPORT_SYMBOL(v4l2_ctrl_replace);
4943 void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
4945 new->u.ctrl.changes |= old->u.ctrl.changes;
4947 EXPORT_SYMBOL(v4l2_ctrl_merge);
4949 const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
4950 .add = v4l2_ctrl_add_event,
4951 .del = v4l2_ctrl_del_event,
4952 .replace = v4l2_ctrl_replace,
4953 .merge = v4l2_ctrl_merge,
4955 EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
4957 int v4l2_ctrl_log_status(struct file *file, void *fh)
4959 struct video_device *vfd = video_devdata(file);
4960 struct v4l2_fh *vfh = file->private_data;
4962 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
4963 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
4964 vfd->v4l2_dev->name);
4967 EXPORT_SYMBOL(v4l2_ctrl_log_status);
4969 int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
4970 const struct v4l2_event_subscription *sub)
4972 if (sub->type == V4L2_EVENT_CTRL)
4973 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
4976 EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
4978 int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
4979 struct v4l2_event_subscription *sub)
4981 if (!sd->ctrl_handler)
4983 return v4l2_ctrl_subscribe_event(fh, sub);
4985 EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
4987 __poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
4989 struct v4l2_fh *fh = file->private_data;
4991 poll_wait(file, &fh->wait, wait);
4992 if (v4l2_event_pending(fh))
4996 EXPORT_SYMBOL(v4l2_ctrl_poll);
4998 int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
4999 const struct v4l2_ctrl_ops *ctrl_ops,
5000 const struct v4l2_fwnode_device_properties *p)
5002 if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) {
5003 u32 orientation_ctrl;
5005 switch (p->orientation) {
5006 case V4L2_FWNODE_ORIENTATION_FRONT:
5007 orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT;
5009 case V4L2_FWNODE_ORIENTATION_BACK:
5010 orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK;
5012 case V4L2_FWNODE_ORIENTATION_EXTERNAL:
5013 orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL;
5018 if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,
5019 V4L2_CID_CAMERA_ORIENTATION,
5020 V4L2_CAMERA_ORIENTATION_EXTERNAL, 0,
5025 if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) {
5026 if (!v4l2_ctrl_new_std(hdl, ctrl_ops,
5027 V4L2_CID_CAMERA_SENSOR_ROTATION,
5028 p->rotation, p->rotation, 1,
5035 EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);