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 mpeg_mpeg2_level[] = {
431 static const char * const mpeg2_profile[] = {
435 "Spatially Scalable",
439 static const char * const mpeg_mpeg4_level[] = {
450 static const char * const mpeg4_profile[] = {
455 "Advanced Coding Efficiency",
459 static const char * const vpx_golden_frame_sel[] = {
460 "Use Previous Frame",
461 "Use Previous Specific Frame",
464 static const char * const vp8_profile[] = {
471 static const char * const vp9_profile[] = {
478 static const char * const vp9_level[] = {
496 static const char * const flash_led_mode[] = {
502 static const char * const flash_strobe_source[] = {
508 static const char * const jpeg_chroma_subsampling[] = {
517 static const char * const dv_tx_mode[] = {
522 static const char * const dv_rgb_range[] = {
524 "RGB Limited Range (16-235)",
525 "RGB Full Range (0-255)",
528 static const char * const dv_it_content_type[] = {
536 static const char * const detect_md_mode[] = {
544 static const char * const hevc_profile[] = {
546 "Main Still Picture",
550 static const char * const hevc_level[] = {
566 static const char * const hevc_hierarchial_coding_type[] = {
571 static const char * const hevc_refresh_type[] = {
577 static const char * const hevc_size_of_length_field[] = {
584 static const char * const hevc_tier[] = {
589 static const char * const hevc_loop_filter_mode[] = {
592 "Disabled at slice boundary",
595 static const char * const hevc_decode_mode[] = {
600 static const char * const hevc_start_code[] = {
602 "Annex B Start Code",
605 static const char * const camera_orientation[] = {
611 static const char * const mpeg_video_frame_skip[] = {
619 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
620 return mpeg_audio_sampling_freq;
621 case V4L2_CID_MPEG_AUDIO_ENCODING:
622 return mpeg_audio_encoding;
623 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
624 return mpeg_audio_l1_bitrate;
625 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
626 return mpeg_audio_l2_bitrate;
627 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
628 return mpeg_audio_l3_bitrate;
629 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
630 return mpeg_audio_ac3_bitrate;
631 case V4L2_CID_MPEG_AUDIO_MODE:
632 return mpeg_audio_mode;
633 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
634 return mpeg_audio_mode_extension;
635 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
636 return mpeg_audio_emphasis;
637 case V4L2_CID_MPEG_AUDIO_CRC:
638 return mpeg_audio_crc;
639 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
640 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
641 return mpeg_audio_dec_playback;
642 case V4L2_CID_MPEG_VIDEO_ENCODING:
643 return mpeg_video_encoding;
644 case V4L2_CID_MPEG_VIDEO_ASPECT:
645 return mpeg_video_aspect;
646 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
647 return mpeg_video_bitrate_mode;
648 case V4L2_CID_MPEG_STREAM_TYPE:
649 return mpeg_stream_type;
650 case V4L2_CID_MPEG_STREAM_VBI_FMT:
651 return mpeg_stream_vbi_fmt;
652 case V4L2_CID_POWER_LINE_FREQUENCY:
653 return camera_power_line_frequency;
654 case V4L2_CID_EXPOSURE_AUTO:
655 return camera_exposure_auto;
656 case V4L2_CID_EXPOSURE_METERING:
657 return camera_exposure_metering;
658 case V4L2_CID_AUTO_FOCUS_RANGE:
659 return camera_auto_focus_range;
660 case V4L2_CID_COLORFX:
662 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
663 return auto_n_preset_white_balance;
664 case V4L2_CID_ISO_SENSITIVITY_AUTO:
665 return camera_iso_sensitivity_auto;
666 case V4L2_CID_SCENE_MODE:
668 case V4L2_CID_TUNE_PREEMPHASIS:
669 return tune_emphasis;
670 case V4L2_CID_TUNE_DEEMPHASIS:
671 return tune_emphasis;
672 case V4L2_CID_FLASH_LED_MODE:
673 return flash_led_mode;
674 case V4L2_CID_FLASH_STROBE_SOURCE:
675 return flash_strobe_source;
676 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
678 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
679 return mpeg_video_frame_skip;
680 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
682 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
684 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
685 return mpeg_h264_level;
686 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
687 return h264_loop_filter;
688 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
690 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
692 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
693 return h264_fp_arrangement_type;
694 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
695 return h264_fmo_map_type;
696 case V4L2_CID_STATELESS_H264_DECODE_MODE:
697 return h264_decode_mode;
698 case V4L2_CID_STATELESS_H264_START_CODE:
699 return h264_start_code;
700 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
701 return mpeg_mpeg2_level;
702 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
703 return mpeg2_profile;
704 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
705 return mpeg_mpeg4_level;
706 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
707 return mpeg4_profile;
708 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
709 return vpx_golden_frame_sel;
710 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
712 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
714 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
716 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
717 return jpeg_chroma_subsampling;
718 case V4L2_CID_DV_TX_MODE:
720 case V4L2_CID_DV_TX_RGB_RANGE:
721 case V4L2_CID_DV_RX_RGB_RANGE:
723 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
724 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
725 return dv_it_content_type;
726 case V4L2_CID_DETECT_MD_MODE:
727 return detect_md_mode;
728 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
730 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
732 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
733 return hevc_hierarchial_coding_type;
734 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
735 return hevc_refresh_type;
736 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
737 return hevc_size_of_length_field;
738 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
740 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
741 return hevc_loop_filter_mode;
742 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE:
743 return hevc_decode_mode;
744 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
745 return hevc_start_code;
746 case V4L2_CID_CAMERA_ORIENTATION:
747 return camera_orientation;
752 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
754 #define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
756 * Returns NULL or an s64 type array containing the menu for given
757 * control ID. The total number of the menu items is returned in @len.
759 const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
761 static const s64 qmenu_int_vpx_num_partitions[] = {
765 static const s64 qmenu_int_vpx_num_ref_frames[] = {
770 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
771 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
772 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
773 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
779 EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
781 /* Return the control name. */
782 const char *v4l2_ctrl_get_name(u32 id)
786 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
787 case V4L2_CID_USER_CLASS: return "User Controls";
788 case V4L2_CID_BRIGHTNESS: return "Brightness";
789 case V4L2_CID_CONTRAST: return "Contrast";
790 case V4L2_CID_SATURATION: return "Saturation";
791 case V4L2_CID_HUE: return "Hue";
792 case V4L2_CID_AUDIO_VOLUME: return "Volume";
793 case V4L2_CID_AUDIO_BALANCE: return "Balance";
794 case V4L2_CID_AUDIO_BASS: return "Bass";
795 case V4L2_CID_AUDIO_TREBLE: return "Treble";
796 case V4L2_CID_AUDIO_MUTE: return "Mute";
797 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
798 case V4L2_CID_BLACK_LEVEL: return "Black Level";
799 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
800 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
801 case V4L2_CID_RED_BALANCE: return "Red Balance";
802 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
803 case V4L2_CID_GAMMA: return "Gamma";
804 case V4L2_CID_EXPOSURE: return "Exposure";
805 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
806 case V4L2_CID_GAIN: return "Gain";
807 case V4L2_CID_HFLIP: return "Horizontal Flip";
808 case V4L2_CID_VFLIP: return "Vertical Flip";
809 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
810 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
811 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
812 case V4L2_CID_SHARPNESS: return "Sharpness";
813 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
814 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
815 case V4L2_CID_COLOR_KILLER: return "Color Killer";
816 case V4L2_CID_COLORFX: return "Color Effects";
817 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
818 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
819 case V4L2_CID_ROTATE: return "Rotate";
820 case V4L2_CID_BG_COLOR: return "Background Color";
821 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
822 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
823 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
824 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
825 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
826 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
827 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
830 /* The MPEG controls are applicable to all codec controls
831 * and the 'MPEG' part of the define is historical */
832 /* Keep the order of the 'case's the same as in videodev2.h! */
833 case V4L2_CID_CODEC_CLASS: return "Codec Controls";
834 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
835 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
836 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
837 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
838 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
839 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
840 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
841 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
842 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
843 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
844 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
845 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
846 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
847 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
848 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
849 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
850 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
851 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
852 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
853 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
854 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
855 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
856 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
857 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
858 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
859 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
860 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
861 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
862 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
863 case V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY: return "Constant Quality";
864 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
865 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
866 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
867 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
868 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
869 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
870 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
871 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
872 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
873 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
874 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
875 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
876 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: return "Frame Skip Mode";
877 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
878 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
879 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
880 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
881 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
882 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
883 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
884 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
885 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
886 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
887 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
888 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
889 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
890 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
891 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
892 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
893 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
894 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
895 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
896 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
897 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
898 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
899 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
900 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
901 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
902 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
903 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
904 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
905 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
906 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
907 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
908 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
909 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
910 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
911 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
912 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
913 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
914 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
915 return "H264 Set QP Value for HC Layers";
916 case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
917 return "H264 Constrained Intra Pred";
918 case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset";
919 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP: return "H264 I-Frame Minimum QP Value";
920 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP: return "H264 I-Frame Maximum QP Value";
921 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP: return "H264 P-Frame Minimum QP Value";
922 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP: return "H264 P-Frame Maximum QP Value";
923 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP: return "H264 B-Frame Minimum QP Value";
924 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP: return "H264 B-Frame Maximum QP Value";
925 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR: return "H264 Hierarchical Lay 0 Bitrate";
926 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR: return "H264 Hierarchical Lay 1 Bitrate";
927 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR: return "H264 Hierarchical Lay 2 Bitrate";
928 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR: return "H264 Hierarchical Lay 3 Bitrate";
929 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR: return "H264 Hierarchical Lay 4 Bitrate";
930 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR: return "H264 Hierarchical Lay 5 Bitrate";
931 case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR: return "H264 Hierarchical Lay 6 Bitrate";
932 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL: return "MPEG2 Level";
933 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE: return "MPEG2 Profile";
934 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
935 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
936 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
937 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
938 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
939 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
940 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
941 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
942 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
943 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
944 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
945 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
946 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
947 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
948 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
949 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
950 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
951 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
952 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
953 case V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID: return "Base Layer Priority ID";
954 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
955 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices";
956 case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
957 case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value";
960 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
961 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
962 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
963 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
964 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
965 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
966 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
967 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
968 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
969 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
970 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
971 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
972 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
973 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL: return "VP9 Level";
974 case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER: return "VP8 Frame Header";
977 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value";
978 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP: return "HEVC P-Frame QP Value";
979 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP: return "HEVC B-Frame QP Value";
980 case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP: return "HEVC Minimum QP Value";
981 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP: return "HEVC Maximum QP Value";
982 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MIN_QP: return "HEVC I-Frame Minimum QP Value";
983 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_MAX_QP: return "HEVC I-Frame Maximum QP Value";
984 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MIN_QP: return "HEVC P-Frame Minimum QP Value";
985 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_MAX_QP: return "HEVC P-Frame Maximum QP Value";
986 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MIN_QP: return "HEVC B-Frame Minimum QP Value";
987 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_MAX_QP: return "HEVC B-Frame Maximum QP Value";
988 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: return "HEVC Profile";
989 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: return "HEVC Level";
990 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: return "HEVC Tier";
991 case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION: return "HEVC Frame Rate Resolution";
992 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH: return "HEVC Maximum Coding Unit Depth";
993 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: return "HEVC Refresh Type";
994 case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED: return "HEVC Constant Intra Prediction";
995 case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU: return "HEVC Lossless Encoding";
996 case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT: return "HEVC Wavefront";
997 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: return "HEVC Loop Filter";
998 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP: return "HEVC QP Values";
999 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: return "HEVC Hierarchical Coding Type";
1000 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER: return "HEVC Hierarchical Coding Layer";
1001 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP: return "HEVC Hierarchical Layer 0 QP";
1002 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP: return "HEVC Hierarchical Layer 1 QP";
1003 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP: return "HEVC Hierarchical Layer 2 QP";
1004 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP: return "HEVC Hierarchical Layer 3 QP";
1005 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP: return "HEVC Hierarchical Layer 4 QP";
1006 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP: return "HEVC Hierarchical Layer 5 QP";
1007 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP: return "HEVC Hierarchical Layer 6 QP";
1008 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR: return "HEVC Hierarchical Lay 0 BitRate";
1009 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR: return "HEVC Hierarchical Lay 1 BitRate";
1010 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR: return "HEVC Hierarchical Lay 2 BitRate";
1011 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR: return "HEVC Hierarchical Lay 3 BitRate";
1012 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR: return "HEVC Hierarchical Lay 4 BitRate";
1013 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR: return "HEVC Hierarchical Lay 5 BitRate";
1014 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR: return "HEVC Hierarchical Lay 6 BitRate";
1015 case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB: return "HEVC General PB";
1016 case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID: return "HEVC Temporal ID";
1017 case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING: return "HEVC Strong Intra Smoothing";
1018 case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT: return "HEVC Intra PU Split";
1019 case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION: return "HEVC TMV Prediction";
1020 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1: return "HEVC Max Num of Candidate MVs";
1021 case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE: return "HEVC ENC Without Startcode";
1022 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD: return "HEVC Num of I-Frame b/w 2 IDR";
1023 case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2: return "HEVC Loop Filter Beta Offset";
1024 case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2: return "HEVC Loop Filter TC Offset";
1025 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: return "HEVC Size of Length Field";
1026 case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES: return "Reference Frames for a P-Frame";
1027 case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR: return "Prepend SPS and PPS to IDR";
1028 case V4L2_CID_MPEG_VIDEO_HEVC_SPS: return "HEVC Sequence Parameter Set";
1029 case V4L2_CID_MPEG_VIDEO_HEVC_PPS: return "HEVC Picture Parameter Set";
1030 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters";
1031 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode";
1032 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code";
1034 /* CAMERA controls */
1035 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1036 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
1037 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
1038 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
1039 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
1040 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
1041 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
1042 case V4L2_CID_PAN_RESET: return "Pan, Reset";
1043 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
1044 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
1045 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
1046 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
1047 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
1048 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
1049 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
1050 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
1051 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
1052 case V4L2_CID_PRIVACY: return "Privacy";
1053 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
1054 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
1055 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
1056 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
1057 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
1058 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
1059 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
1060 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
1061 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
1062 case V4L2_CID_SCENE_MODE: return "Scene Mode";
1063 case V4L2_CID_3A_LOCK: return "3A Lock";
1064 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
1065 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
1066 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
1067 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
1068 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
1069 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
1070 case V4L2_CID_UNIT_CELL_SIZE: return "Unit Cell Size";
1071 case V4L2_CID_CAMERA_ORIENTATION: return "Camera Orientation";
1072 case V4L2_CID_CAMERA_SENSOR_ROTATION: return "Camera Sensor Rotation";
1074 /* FM Radio Modulator controls */
1075 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1076 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
1077 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
1078 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
1079 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
1080 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
1081 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
1082 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
1083 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
1084 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
1085 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
1086 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1087 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1088 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
1089 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
1090 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
1091 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
1092 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
1093 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
1094 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
1095 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
1096 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
1097 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
1098 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
1099 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
1100 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
1101 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
1102 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
1103 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
1104 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
1106 /* Flash controls */
1107 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1108 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
1109 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
1110 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
1111 case V4L2_CID_FLASH_STROBE: return "Strobe";
1112 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
1113 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
1114 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
1115 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
1116 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
1117 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
1118 case V4L2_CID_FLASH_FAULT: return "Faults";
1119 case V4L2_CID_FLASH_CHARGE: return "Charge";
1120 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
1122 /* JPEG encoder controls */
1123 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1124 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
1125 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
1126 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
1127 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
1128 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
1130 /* Image source controls */
1131 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1132 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
1133 case V4L2_CID_VBLANK: return "Vertical Blanking";
1134 case V4L2_CID_HBLANK: return "Horizontal Blanking";
1135 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
1136 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
1137 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
1138 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
1139 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
1141 /* Image processing controls */
1142 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1143 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
1144 case V4L2_CID_LINK_FREQ: return "Link Frequency";
1145 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
1146 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
1147 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
1148 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
1151 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1152 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
1153 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
1154 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
1155 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
1156 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
1157 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
1158 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
1159 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
1160 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
1161 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
1163 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
1164 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
1165 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
1166 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
1167 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
1168 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
1169 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
1170 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
1171 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
1172 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
1173 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
1174 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
1175 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
1176 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
1177 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
1178 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
1179 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
1180 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1181 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1182 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
1184 /* Detection controls */
1185 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1186 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
1187 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
1188 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
1189 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
1190 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
1192 /* Stateless Codec controls */
1193 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1194 case V4L2_CID_CODEC_STATELESS_CLASS: return "Stateless Codec Controls";
1195 case V4L2_CID_STATELESS_H264_DECODE_MODE: return "H264 Decode Mode";
1196 case V4L2_CID_STATELESS_H264_START_CODE: return "H264 Start Code";
1197 case V4L2_CID_STATELESS_H264_SPS: return "H264 Sequence Parameter Set";
1198 case V4L2_CID_STATELESS_H264_PPS: return "H264 Picture Parameter Set";
1199 case V4L2_CID_STATELESS_H264_SCALING_MATRIX: return "H264 Scaling Matrix";
1200 case V4L2_CID_STATELESS_H264_PRED_WEIGHTS: return "H264 Prediction Weight Table";
1201 case V4L2_CID_STATELESS_H264_SLICE_PARAMS: return "H264 Slice Parameters";
1202 case V4L2_CID_STATELESS_H264_DECODE_PARAMS: return "H264 Decode Parameters";
1203 case V4L2_CID_STATELESS_FWHT_PARAMS: return "FWHT Stateless Parameters";
1208 EXPORT_SYMBOL(v4l2_ctrl_get_name);
1210 void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
1211 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
1213 *name = v4l2_ctrl_get_name(id);
1217 case V4L2_CID_AUDIO_MUTE:
1218 case V4L2_CID_AUDIO_LOUDNESS:
1219 case V4L2_CID_AUTO_WHITE_BALANCE:
1220 case V4L2_CID_AUTOGAIN:
1221 case V4L2_CID_HFLIP:
1222 case V4L2_CID_VFLIP:
1223 case V4L2_CID_HUE_AUTO:
1224 case V4L2_CID_CHROMA_AGC:
1225 case V4L2_CID_COLOR_KILLER:
1226 case V4L2_CID_AUTOBRIGHTNESS:
1227 case V4L2_CID_MPEG_AUDIO_MUTE:
1228 case V4L2_CID_MPEG_VIDEO_MUTE:
1229 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
1230 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
1231 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
1232 case V4L2_CID_FOCUS_AUTO:
1233 case V4L2_CID_PRIVACY:
1234 case V4L2_CID_AUDIO_LIMITER_ENABLED:
1235 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
1236 case V4L2_CID_PILOT_TONE_ENABLED:
1237 case V4L2_CID_ILLUMINATORS_1:
1238 case V4L2_CID_ILLUMINATORS_2:
1239 case V4L2_CID_FLASH_STROBE_STATUS:
1240 case V4L2_CID_FLASH_CHARGE:
1241 case V4L2_CID_FLASH_READY:
1242 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
1243 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
1244 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
1245 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
1246 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
1247 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
1248 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
1249 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
1250 case V4L2_CID_WIDE_DYNAMIC_RANGE:
1251 case V4L2_CID_IMAGE_STABILIZATION:
1252 case V4L2_CID_RDS_RECEPTION:
1253 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
1254 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
1255 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
1256 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1257 case V4L2_CID_RF_TUNER_PLL_LOCK:
1258 case V4L2_CID_RDS_TX_MONO_STEREO:
1259 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
1260 case V4L2_CID_RDS_TX_COMPRESSED:
1261 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
1262 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
1263 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
1264 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
1265 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
1266 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1267 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1268 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
1269 *type = V4L2_CTRL_TYPE_BOOLEAN;
1273 case V4L2_CID_ROTATE:
1274 *type = V4L2_CTRL_TYPE_INTEGER;
1275 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1277 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
1278 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1279 *type = V4L2_CTRL_TYPE_INTEGER;
1281 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
1282 case V4L2_CID_PAN_RESET:
1283 case V4L2_CID_TILT_RESET:
1284 case V4L2_CID_FLASH_STROBE:
1285 case V4L2_CID_FLASH_STROBE_STOP:
1286 case V4L2_CID_AUTO_FOCUS_START:
1287 case V4L2_CID_AUTO_FOCUS_STOP:
1288 case V4L2_CID_DO_WHITE_BALANCE:
1289 *type = V4L2_CTRL_TYPE_BUTTON;
1290 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1291 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1292 *min = *max = *step = *def = 0;
1294 case V4L2_CID_POWER_LINE_FREQUENCY:
1295 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1296 case V4L2_CID_MPEG_AUDIO_ENCODING:
1297 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1298 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1299 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1300 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1301 case V4L2_CID_MPEG_AUDIO_MODE:
1302 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1303 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1304 case V4L2_CID_MPEG_AUDIO_CRC:
1305 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1306 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
1307 case V4L2_CID_MPEG_VIDEO_ENCODING:
1308 case V4L2_CID_MPEG_VIDEO_ASPECT:
1309 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1310 case V4L2_CID_MPEG_STREAM_TYPE:
1311 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1312 case V4L2_CID_EXPOSURE_AUTO:
1313 case V4L2_CID_AUTO_FOCUS_RANGE:
1314 case V4L2_CID_COLORFX:
1315 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
1316 case V4L2_CID_TUNE_PREEMPHASIS:
1317 case V4L2_CID_FLASH_LED_MODE:
1318 case V4L2_CID_FLASH_STROBE_SOURCE:
1319 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1320 case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
1321 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1322 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1323 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1324 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1325 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1326 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
1327 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1328 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
1329 case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
1330 case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
1331 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1332 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
1333 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
1334 case V4L2_CID_ISO_SENSITIVITY_AUTO:
1335 case V4L2_CID_EXPOSURE_METERING:
1336 case V4L2_CID_SCENE_MODE:
1337 case V4L2_CID_DV_TX_MODE:
1338 case V4L2_CID_DV_TX_RGB_RANGE:
1339 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
1340 case V4L2_CID_DV_RX_RGB_RANGE:
1341 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
1342 case V4L2_CID_TEST_PATTERN:
1343 case V4L2_CID_DEINTERLACING_MODE:
1344 case V4L2_CID_TUNE_DEEMPHASIS:
1345 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
1346 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
1347 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
1348 case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
1349 case V4L2_CID_DETECT_MD_MODE:
1350 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
1351 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
1352 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
1353 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
1354 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
1355 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
1356 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
1357 case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE:
1358 case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE:
1359 case V4L2_CID_STATELESS_H264_DECODE_MODE:
1360 case V4L2_CID_STATELESS_H264_START_CODE:
1361 case V4L2_CID_CAMERA_ORIENTATION:
1362 *type = V4L2_CTRL_TYPE_MENU;
1364 case V4L2_CID_LINK_FREQ:
1365 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1367 case V4L2_CID_RDS_TX_PS_NAME:
1368 case V4L2_CID_RDS_TX_RADIO_TEXT:
1369 case V4L2_CID_RDS_RX_PS_NAME:
1370 case V4L2_CID_RDS_RX_RADIO_TEXT:
1371 *type = V4L2_CTRL_TYPE_STRING;
1373 case V4L2_CID_ISO_SENSITIVITY:
1374 case V4L2_CID_AUTO_EXPOSURE_BIAS:
1375 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1376 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
1377 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1379 case V4L2_CID_USER_CLASS:
1380 case V4L2_CID_CAMERA_CLASS:
1381 case V4L2_CID_CODEC_CLASS:
1382 case V4L2_CID_FM_TX_CLASS:
1383 case V4L2_CID_FLASH_CLASS:
1384 case V4L2_CID_JPEG_CLASS:
1385 case V4L2_CID_IMAGE_SOURCE_CLASS:
1386 case V4L2_CID_IMAGE_PROC_CLASS:
1387 case V4L2_CID_DV_CLASS:
1388 case V4L2_CID_FM_RX_CLASS:
1389 case V4L2_CID_RF_TUNER_CLASS:
1390 case V4L2_CID_DETECT_CLASS:
1391 case V4L2_CID_CODEC_STATELESS_CLASS:
1392 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1393 /* You can neither read not write these */
1394 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1395 *min = *max = *step = *def = 0;
1397 case V4L2_CID_BG_COLOR:
1398 *type = V4L2_CTRL_TYPE_INTEGER;
1401 /* Max is calculated as RGB888 that is 2^24 */
1404 case V4L2_CID_FLASH_FAULT:
1405 case V4L2_CID_JPEG_ACTIVE_MARKER:
1406 case V4L2_CID_3A_LOCK:
1407 case V4L2_CID_AUTO_FOCUS_STATUS:
1408 case V4L2_CID_DV_TX_HOTPLUG:
1409 case V4L2_CID_DV_TX_RXSENSE:
1410 case V4L2_CID_DV_TX_EDID_PRESENT:
1411 case V4L2_CID_DV_RX_POWER_PRESENT:
1412 *type = V4L2_CTRL_TYPE_BITMASK;
1414 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1415 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1416 *type = V4L2_CTRL_TYPE_INTEGER;
1417 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1419 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
1420 *type = V4L2_CTRL_TYPE_INTEGER64;
1421 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1423 *max = 0x1ffffffffLL;
1426 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1427 *type = V4L2_CTRL_TYPE_INTEGER64;
1428 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1430 *max = 0x7fffffffffffffffLL;
1433 case V4L2_CID_PIXEL_RATE:
1434 *type = V4L2_CTRL_TYPE_INTEGER64;
1435 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1437 case V4L2_CID_DETECT_MD_REGION_GRID:
1438 *type = V4L2_CTRL_TYPE_U8;
1440 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1441 *type = V4L2_CTRL_TYPE_U16;
1443 case V4L2_CID_RDS_TX_ALT_FREQS:
1444 *type = V4L2_CTRL_TYPE_U32;
1446 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
1447 *type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
1449 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
1450 *type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
1452 case V4L2_CID_STATELESS_FWHT_PARAMS:
1453 *type = V4L2_CTRL_TYPE_FWHT_PARAMS;
1455 case V4L2_CID_STATELESS_H264_SPS:
1456 *type = V4L2_CTRL_TYPE_H264_SPS;
1458 case V4L2_CID_STATELESS_H264_PPS:
1459 *type = V4L2_CTRL_TYPE_H264_PPS;
1461 case V4L2_CID_STATELESS_H264_SCALING_MATRIX:
1462 *type = V4L2_CTRL_TYPE_H264_SCALING_MATRIX;
1464 case V4L2_CID_STATELESS_H264_SLICE_PARAMS:
1465 *type = V4L2_CTRL_TYPE_H264_SLICE_PARAMS;
1467 case V4L2_CID_STATELESS_H264_DECODE_PARAMS:
1468 *type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
1470 case V4L2_CID_STATELESS_H264_PRED_WEIGHTS:
1471 *type = V4L2_CTRL_TYPE_H264_PRED_WEIGHTS;
1473 case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER:
1474 *type = V4L2_CTRL_TYPE_VP8_FRAME_HEADER;
1476 case V4L2_CID_MPEG_VIDEO_HEVC_SPS:
1477 *type = V4L2_CTRL_TYPE_HEVC_SPS;
1479 case V4L2_CID_MPEG_VIDEO_HEVC_PPS:
1480 *type = V4L2_CTRL_TYPE_HEVC_PPS;
1482 case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
1483 *type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
1485 case V4L2_CID_UNIT_CELL_SIZE:
1486 *type = V4L2_CTRL_TYPE_AREA;
1487 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1490 *type = V4L2_CTRL_TYPE_INTEGER;
1494 case V4L2_CID_MPEG_AUDIO_ENCODING:
1495 case V4L2_CID_MPEG_AUDIO_MODE:
1496 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1497 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1498 case V4L2_CID_MPEG_STREAM_TYPE:
1499 *flags |= V4L2_CTRL_FLAG_UPDATE;
1501 case V4L2_CID_AUDIO_VOLUME:
1502 case V4L2_CID_AUDIO_BALANCE:
1503 case V4L2_CID_AUDIO_BASS:
1504 case V4L2_CID_AUDIO_TREBLE:
1505 case V4L2_CID_BRIGHTNESS:
1506 case V4L2_CID_CONTRAST:
1507 case V4L2_CID_SATURATION:
1509 case V4L2_CID_RED_BALANCE:
1510 case V4L2_CID_BLUE_BALANCE:
1511 case V4L2_CID_GAMMA:
1512 case V4L2_CID_SHARPNESS:
1513 case V4L2_CID_CHROMA_GAIN:
1514 case V4L2_CID_RDS_TX_DEVIATION:
1515 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1516 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1517 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1518 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1519 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1520 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1521 case V4L2_CID_PILOT_TONE_DEVIATION:
1522 case V4L2_CID_PILOT_TONE_FREQUENCY:
1523 case V4L2_CID_TUNE_POWER_LEVEL:
1524 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1525 case V4L2_CID_RF_TUNER_RF_GAIN:
1526 case V4L2_CID_RF_TUNER_LNA_GAIN:
1527 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1528 case V4L2_CID_RF_TUNER_IF_GAIN:
1529 case V4L2_CID_RF_TUNER_BANDWIDTH:
1530 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
1531 *flags |= V4L2_CTRL_FLAG_SLIDER;
1533 case V4L2_CID_PAN_RELATIVE:
1534 case V4L2_CID_TILT_RELATIVE:
1535 case V4L2_CID_FOCUS_RELATIVE:
1536 case V4L2_CID_IRIS_RELATIVE:
1537 case V4L2_CID_ZOOM_RELATIVE:
1538 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1539 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
1541 case V4L2_CID_FLASH_STROBE_STATUS:
1542 case V4L2_CID_AUTO_FOCUS_STATUS:
1543 case V4L2_CID_FLASH_READY:
1544 case V4L2_CID_DV_TX_HOTPLUG:
1545 case V4L2_CID_DV_TX_RXSENSE:
1546 case V4L2_CID_DV_TX_EDID_PRESENT:
1547 case V4L2_CID_DV_RX_POWER_PRESENT:
1548 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
1549 case V4L2_CID_RDS_RX_PTY:
1550 case V4L2_CID_RDS_RX_PS_NAME:
1551 case V4L2_CID_RDS_RX_RADIO_TEXT:
1552 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1553 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1554 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
1555 case V4L2_CID_CAMERA_ORIENTATION:
1556 case V4L2_CID_CAMERA_SENSOR_ROTATION:
1557 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1559 case V4L2_CID_RF_TUNER_PLL_LOCK:
1560 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1564 EXPORT_SYMBOL(v4l2_ctrl_fill);
1566 static u32 user_flags(const struct v4l2_ctrl *ctrl)
1568 u32 flags = ctrl->flags;
1571 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
1576 static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1578 memset(ev, 0, sizeof(*ev));
1579 ev->type = V4L2_EVENT_CTRL;
1581 ev->u.ctrl.changes = changes;
1582 ev->u.ctrl.type = ctrl->type;
1583 ev->u.ctrl.flags = user_flags(ctrl);
1585 ev->u.ctrl.value64 = 0;
1587 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
1588 ev->u.ctrl.minimum = ctrl->minimum;
1589 ev->u.ctrl.maximum = ctrl->maximum;
1590 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1591 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
1592 ev->u.ctrl.step = 1;
1594 ev->u.ctrl.step = ctrl->step;
1595 ev->u.ctrl.default_value = ctrl->default_value;
1598 static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1600 struct v4l2_event ev;
1601 struct v4l2_subscribed_event *sev;
1603 if (list_empty(&ctrl->ev_subs))
1605 fill_event(&ev, ctrl, changes);
1607 list_for_each_entry(sev, &ctrl->ev_subs, node)
1608 if (sev->fh != fh ||
1609 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
1610 v4l2_event_queue_fh(sev->fh, &ev);
1613 static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
1614 union v4l2_ctrl_ptr ptr1,
1615 union v4l2_ctrl_ptr ptr2)
1617 switch (ctrl->type) {
1618 case V4L2_CTRL_TYPE_BUTTON:
1620 case V4L2_CTRL_TYPE_STRING:
1621 idx *= ctrl->elem_size;
1622 /* strings are always 0-terminated */
1623 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
1624 case V4L2_CTRL_TYPE_INTEGER64:
1625 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
1626 case V4L2_CTRL_TYPE_U8:
1627 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1628 case V4L2_CTRL_TYPE_U16:
1629 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
1630 case V4L2_CTRL_TYPE_U32:
1631 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
1634 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1635 idx *= ctrl->elem_size;
1636 return !memcmp(ptr1.p_const + idx, ptr2.p_const + idx,
1641 static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
1642 union v4l2_ctrl_ptr ptr)
1644 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
1645 struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header;
1646 struct v4l2_ctrl_fwht_params *p_fwht_params;
1647 void *p = ptr.p + idx * ctrl->elem_size;
1649 if (ctrl->p_def.p_const)
1650 memcpy(p, ctrl->p_def.p_const, ctrl->elem_size);
1652 memset(p, 0, ctrl->elem_size);
1655 * The cast is needed to get rid of a gcc warning complaining that
1656 * V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS is not part of the
1657 * v4l2_ctrl_type enum.
1659 switch ((u32)ctrl->type) {
1660 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1661 p_mpeg2_slice_params = p;
1663 p_mpeg2_slice_params->sequence.chroma_format = 1;
1664 /* interlaced top field */
1665 p_mpeg2_slice_params->picture.picture_structure = 1;
1666 p_mpeg2_slice_params->picture.picture_coding_type =
1667 V4L2_MPEG2_PICTURE_CODING_TYPE_I;
1669 case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
1670 p_vp8_frame_header = p;
1671 p_vp8_frame_header->num_dct_parts = 1;
1673 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1675 p_fwht_params->version = V4L2_FWHT_VERSION;
1676 p_fwht_params->width = 1280;
1677 p_fwht_params->height = 720;
1682 static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
1683 union v4l2_ctrl_ptr ptr)
1685 switch (ctrl->type) {
1686 case V4L2_CTRL_TYPE_STRING:
1687 idx *= ctrl->elem_size;
1688 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1689 ptr.p_char[idx + ctrl->minimum] = '\0';
1691 case V4L2_CTRL_TYPE_INTEGER64:
1692 ptr.p_s64[idx] = ctrl->default_value;
1694 case V4L2_CTRL_TYPE_INTEGER:
1695 case V4L2_CTRL_TYPE_INTEGER_MENU:
1696 case V4L2_CTRL_TYPE_MENU:
1697 case V4L2_CTRL_TYPE_BITMASK:
1698 case V4L2_CTRL_TYPE_BOOLEAN:
1699 ptr.p_s32[idx] = ctrl->default_value;
1701 case V4L2_CTRL_TYPE_BUTTON:
1702 case V4L2_CTRL_TYPE_CTRL_CLASS:
1705 case V4L2_CTRL_TYPE_U8:
1706 ptr.p_u8[idx] = ctrl->default_value;
1708 case V4L2_CTRL_TYPE_U16:
1709 ptr.p_u16[idx] = ctrl->default_value;
1711 case V4L2_CTRL_TYPE_U32:
1712 ptr.p_u32[idx] = ctrl->default_value;
1715 std_init_compound(ctrl, idx, ptr);
1720 static void std_log(const struct v4l2_ctrl *ctrl)
1722 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1724 if (ctrl->is_array) {
1727 for (i = 0; i < ctrl->nr_of_dims; i++)
1728 pr_cont("[%u]", ctrl->dims[i]);
1732 switch (ctrl->type) {
1733 case V4L2_CTRL_TYPE_INTEGER:
1734 pr_cont("%d", *ptr.p_s32);
1736 case V4L2_CTRL_TYPE_BOOLEAN:
1737 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1739 case V4L2_CTRL_TYPE_MENU:
1740 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1742 case V4L2_CTRL_TYPE_INTEGER_MENU:
1743 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1745 case V4L2_CTRL_TYPE_BITMASK:
1746 pr_cont("0x%08x", *ptr.p_s32);
1748 case V4L2_CTRL_TYPE_INTEGER64:
1749 pr_cont("%lld", *ptr.p_s64);
1751 case V4L2_CTRL_TYPE_STRING:
1752 pr_cont("%s", ptr.p_char);
1754 case V4L2_CTRL_TYPE_U8:
1755 pr_cont("%u", (unsigned)*ptr.p_u8);
1757 case V4L2_CTRL_TYPE_U16:
1758 pr_cont("%u", (unsigned)*ptr.p_u16);
1760 case V4L2_CTRL_TYPE_U32:
1761 pr_cont("%u", (unsigned)*ptr.p_u32);
1763 case V4L2_CTRL_TYPE_H264_SPS:
1764 pr_cont("H264_SPS");
1766 case V4L2_CTRL_TYPE_H264_PPS:
1767 pr_cont("H264_PPS");
1769 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
1770 pr_cont("H264_SCALING_MATRIX");
1772 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
1773 pr_cont("H264_SLICE_PARAMS");
1775 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
1776 pr_cont("H264_DECODE_PARAMS");
1778 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
1779 pr_cont("H264_PRED_WEIGHTS");
1781 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1782 pr_cont("FWHT_PARAMS");
1785 pr_cont("unknown type %d", ctrl->type);
1791 * Round towards the closest legal value. Be careful when we are
1792 * close to the maximum range of the control type to prevent
1795 #define ROUND_TO_RANGE(val, offset_type, ctrl) \
1797 offset_type offset; \
1798 if ((ctrl)->maximum >= 0 && \
1799 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
1800 val = (ctrl)->maximum; \
1802 val += (s32)((ctrl)->step / 2); \
1803 val = clamp_t(typeof(val), val, \
1804 (ctrl)->minimum, (ctrl)->maximum); \
1805 offset = (val) - (ctrl)->minimum; \
1806 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
1807 val = (ctrl)->minimum + offset; \
1811 /* Validate a new control */
1813 #define zero_padding(s) \
1814 memset(&(s).padding, 0, sizeof((s).padding))
1815 #define zero_reserved(s) \
1816 memset(&(s).reserved, 0, sizeof((s).reserved))
1819 * Compound controls validation requires setting unused fields/flags to zero
1820 * in order to properly detect unchanged controls with std_equal's memcmp.
1822 static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
1823 union v4l2_ctrl_ptr ptr)
1825 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
1826 struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header;
1827 struct v4l2_ctrl_fwht_params *p_fwht_params;
1828 struct v4l2_ctrl_h264_sps *p_h264_sps;
1829 struct v4l2_ctrl_h264_pps *p_h264_pps;
1830 struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights;
1831 struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
1832 struct v4l2_ctrl_h264_decode_params *p_h264_dec_params;
1833 struct v4l2_ctrl_hevc_sps *p_hevc_sps;
1834 struct v4l2_ctrl_hevc_pps *p_hevc_pps;
1835 struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
1836 struct v4l2_area *area;
1837 void *p = ptr.p + idx * ctrl->elem_size;
1840 switch ((u32)ctrl->type) {
1841 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1842 p_mpeg2_slice_params = p;
1844 switch (p_mpeg2_slice_params->sequence.chroma_format) {
1853 switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
1854 case 0: /* 8 bits */
1855 case 1: /* 9 bits */
1856 case 2: /* 10 bits */
1857 case 3: /* 11 bits */
1863 switch (p_mpeg2_slice_params->picture.picture_structure) {
1864 case 1: /* interlaced top field */
1865 case 2: /* interlaced bottom field */
1866 case 3: /* progressive */
1872 switch (p_mpeg2_slice_params->picture.picture_coding_type) {
1873 case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
1874 case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
1875 case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
1883 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
1886 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1888 if (p_fwht_params->version < V4L2_FWHT_VERSION)
1890 if (!p_fwht_params->width || !p_fwht_params->height)
1894 case V4L2_CTRL_TYPE_H264_SPS:
1897 /* Some syntax elements are only conditionally valid */
1898 if (p_h264_sps->pic_order_cnt_type != 0) {
1899 p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0;
1900 } else if (p_h264_sps->pic_order_cnt_type != 1) {
1901 p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0;
1902 p_h264_sps->offset_for_non_ref_pic = 0;
1903 p_h264_sps->offset_for_top_to_bottom_field = 0;
1904 memset(&p_h264_sps->offset_for_ref_frame, 0,
1905 sizeof(p_h264_sps->offset_for_ref_frame));
1908 if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) {
1909 p_h264_sps->chroma_format_idc = 1;
1910 p_h264_sps->bit_depth_luma_minus8 = 0;
1911 p_h264_sps->bit_depth_chroma_minus8 = 0;
1913 p_h264_sps->flags &=
1914 ~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
1916 if (p_h264_sps->chroma_format_idc < 3)
1917 p_h264_sps->flags &=
1918 ~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
1921 if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
1922 p_h264_sps->flags &=
1923 ~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
1926 * Chroma 4:2:2 format require at least High 4:2:2 profile.
1928 * The H264 specification and well-known parser implementations
1929 * use profile-idc values directly, as that is clearer and
1930 * less ambiguous. We do the same here.
1932 if (p_h264_sps->profile_idc < 122 &&
1933 p_h264_sps->chroma_format_idc > 1)
1935 /* Chroma 4:4:4 format require at least High 4:2:2 profile */
1936 if (p_h264_sps->profile_idc < 244 &&
1937 p_h264_sps->chroma_format_idc > 2)
1939 if (p_h264_sps->chroma_format_idc > 3)
1942 if (p_h264_sps->bit_depth_luma_minus8 > 6)
1944 if (p_h264_sps->bit_depth_chroma_minus8 > 6)
1946 if (p_h264_sps->log2_max_frame_num_minus4 > 12)
1948 if (p_h264_sps->pic_order_cnt_type > 2)
1950 if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12)
1952 if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN)
1956 case V4L2_CTRL_TYPE_H264_PPS:
1959 if (p_h264_pps->num_slice_groups_minus1 > 7)
1961 if (p_h264_pps->num_ref_idx_l0_default_active_minus1 >
1962 (V4L2_H264_REF_LIST_LEN - 1))
1964 if (p_h264_pps->num_ref_idx_l1_default_active_minus1 >
1965 (V4L2_H264_REF_LIST_LEN - 1))
1967 if (p_h264_pps->weighted_bipred_idc > 2)
1970 * pic_init_qp_minus26 shall be in the range of
1971 * -(26 + QpBdOffset_y) to +25, inclusive,
1972 * where QpBdOffset_y is 6 * bit_depth_luma_minus8
1974 if (p_h264_pps->pic_init_qp_minus26 < -62 ||
1975 p_h264_pps->pic_init_qp_minus26 > 25)
1977 if (p_h264_pps->pic_init_qs_minus26 < -26 ||
1978 p_h264_pps->pic_init_qs_minus26 > 25)
1980 if (p_h264_pps->chroma_qp_index_offset < -12 ||
1981 p_h264_pps->chroma_qp_index_offset > 12)
1983 if (p_h264_pps->second_chroma_qp_index_offset < -12 ||
1984 p_h264_pps->second_chroma_qp_index_offset > 12)
1988 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
1991 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
1992 p_h264_pred_weights = p;
1994 if (p_h264_pred_weights->luma_log2_weight_denom > 7)
1996 if (p_h264_pred_weights->chroma_log2_weight_denom > 7)
2000 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
2001 p_h264_slice_params = p;
2003 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
2004 p_h264_slice_params->flags &=
2005 ~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
2007 if (p_h264_slice_params->colour_plane_id > 2)
2009 if (p_h264_slice_params->cabac_init_idc > 2)
2011 if (p_h264_slice_params->disable_deblocking_filter_idc > 2)
2013 if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 ||
2014 p_h264_slice_params->slice_alpha_c0_offset_div2 > 6)
2016 if (p_h264_slice_params->slice_beta_offset_div2 < -6 ||
2017 p_h264_slice_params->slice_beta_offset_div2 > 6)
2020 if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I ||
2021 p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI)
2022 p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0;
2023 if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
2024 p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0;
2026 if (p_h264_slice_params->num_ref_idx_l0_active_minus1 >
2027 (V4L2_H264_REF_LIST_LEN - 1))
2029 if (p_h264_slice_params->num_ref_idx_l1_active_minus1 >
2030 (V4L2_H264_REF_LIST_LEN - 1))
2032 zero_reserved(*p_h264_slice_params);
2035 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
2036 p_h264_dec_params = p;
2038 if (p_h264_dec_params->nal_ref_idc > 3)
2040 for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
2041 struct v4l2_h264_dpb_entry *dpb_entry =
2042 &p_h264_dec_params->dpb[i];
2044 zero_reserved(*dpb_entry);
2046 zero_reserved(*p_h264_dec_params);
2049 case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
2050 p_vp8_frame_header = p;
2052 switch (p_vp8_frame_header->num_dct_parts) {
2061 zero_padding(p_vp8_frame_header->segment_header);
2062 zero_padding(p_vp8_frame_header->lf_header);
2063 zero_padding(p_vp8_frame_header->quant_header);
2064 zero_padding(p_vp8_frame_header->entropy_header);
2065 zero_padding(p_vp8_frame_header->coder_state);
2068 case V4L2_CTRL_TYPE_HEVC_SPS:
2071 if (!(p_hevc_sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED)) {
2072 p_hevc_sps->pcm_sample_bit_depth_luma_minus1 = 0;
2073 p_hevc_sps->pcm_sample_bit_depth_chroma_minus1 = 0;
2074 p_hevc_sps->log2_min_pcm_luma_coding_block_size_minus3 = 0;
2075 p_hevc_sps->log2_diff_max_min_pcm_luma_coding_block_size = 0;
2078 if (!(p_hevc_sps->flags &
2079 V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT))
2080 p_hevc_sps->num_long_term_ref_pics_sps = 0;
2083 case V4L2_CTRL_TYPE_HEVC_PPS:
2086 if (!(p_hevc_pps->flags &
2087 V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED))
2088 p_hevc_pps->diff_cu_qp_delta_depth = 0;
2090 if (!(p_hevc_pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED)) {
2091 p_hevc_pps->num_tile_columns_minus1 = 0;
2092 p_hevc_pps->num_tile_rows_minus1 = 0;
2093 memset(&p_hevc_pps->column_width_minus1, 0,
2094 sizeof(p_hevc_pps->column_width_minus1));
2095 memset(&p_hevc_pps->row_height_minus1, 0,
2096 sizeof(p_hevc_pps->row_height_minus1));
2098 p_hevc_pps->flags &=
2099 ~V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED;
2102 if (p_hevc_pps->flags &
2103 V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER) {
2104 p_hevc_pps->pps_beta_offset_div2 = 0;
2105 p_hevc_pps->pps_tc_offset_div2 = 0;
2108 zero_padding(*p_hevc_pps);
2111 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
2112 p_hevc_slice_params = p;
2114 if (p_hevc_slice_params->num_active_dpb_entries >
2115 V4L2_HEVC_DPB_ENTRIES_NUM_MAX)
2118 zero_padding(p_hevc_slice_params->pred_weight_table);
2120 for (i = 0; i < p_hevc_slice_params->num_active_dpb_entries;
2122 struct v4l2_hevc_dpb_entry *dpb_entry =
2123 &p_hevc_slice_params->dpb[i];
2125 zero_padding(*dpb_entry);
2128 zero_padding(*p_hevc_slice_params);
2131 case V4L2_CTRL_TYPE_AREA:
2133 if (!area->width || !area->height)
2144 static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
2145 union v4l2_ctrl_ptr ptr)
2151 switch ((u32)ctrl->type) {
2152 case V4L2_CTRL_TYPE_INTEGER:
2153 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
2154 case V4L2_CTRL_TYPE_INTEGER64:
2156 * We can't use the ROUND_TO_RANGE define here due to
2157 * the u64 divide that needs special care.
2159 val = ptr.p_s64[idx];
2160 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
2161 val = ctrl->maximum;
2163 val += (s64)(ctrl->step / 2);
2164 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
2165 offset = val - ctrl->minimum;
2166 do_div(offset, ctrl->step);
2167 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
2169 case V4L2_CTRL_TYPE_U8:
2170 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
2171 case V4L2_CTRL_TYPE_U16:
2172 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
2173 case V4L2_CTRL_TYPE_U32:
2174 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
2176 case V4L2_CTRL_TYPE_BOOLEAN:
2177 ptr.p_s32[idx] = !!ptr.p_s32[idx];
2180 case V4L2_CTRL_TYPE_MENU:
2181 case V4L2_CTRL_TYPE_INTEGER_MENU:
2182 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
2184 if (ptr.p_s32[idx] < BITS_PER_LONG_LONG &&
2185 (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx])))
2187 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
2188 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
2192 case V4L2_CTRL_TYPE_BITMASK:
2193 ptr.p_s32[idx] &= ctrl->maximum;
2196 case V4L2_CTRL_TYPE_BUTTON:
2197 case V4L2_CTRL_TYPE_CTRL_CLASS:
2201 case V4L2_CTRL_TYPE_STRING:
2202 idx *= ctrl->elem_size;
2203 len = strlen(ptr.p_char + idx);
2204 if (len < ctrl->minimum)
2206 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
2211 return std_validate_compound(ctrl, idx, ptr);
2215 static const struct v4l2_ctrl_type_ops std_type_ops = {
2219 .validate = std_validate,
2222 /* Helper function: copy the given control value back to the caller */
2223 static int ptr_to_user(struct v4l2_ext_control *c,
2224 struct v4l2_ctrl *ctrl,
2225 union v4l2_ctrl_ptr ptr)
2229 if (ctrl->is_ptr && !ctrl->is_string)
2230 return copy_to_user(c->ptr, ptr.p_const, c->size) ?
2233 switch (ctrl->type) {
2234 case V4L2_CTRL_TYPE_STRING:
2235 len = strlen(ptr.p_char);
2236 if (c->size < len + 1) {
2237 c->size = ctrl->elem_size;
2240 return copy_to_user(c->string, ptr.p_char, len + 1) ?
2242 case V4L2_CTRL_TYPE_INTEGER64:
2243 c->value64 = *ptr.p_s64;
2246 c->value = *ptr.p_s32;
2252 /* Helper function: copy the current control value back to the caller */
2253 static int cur_to_user(struct v4l2_ext_control *c,
2254 struct v4l2_ctrl *ctrl)
2256 return ptr_to_user(c, ctrl, ctrl->p_cur);
2259 /* Helper function: copy the new control value back to the caller */
2260 static int new_to_user(struct v4l2_ext_control *c,
2261 struct v4l2_ctrl *ctrl)
2263 return ptr_to_user(c, ctrl, ctrl->p_new);
2266 /* Helper function: copy the request value back to the caller */
2267 static int req_to_user(struct v4l2_ext_control *c,
2268 struct v4l2_ctrl_ref *ref)
2270 return ptr_to_user(c, ref->ctrl, ref->p_req);
2273 /* Helper function: copy the initial control value back to the caller */
2274 static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
2278 for (idx = 0; idx < ctrl->elems; idx++)
2279 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2281 return ptr_to_user(c, ctrl, ctrl->p_new);
2284 /* Helper function: copy the caller-provider value to the given control value */
2285 static int user_to_ptr(struct v4l2_ext_control *c,
2286 struct v4l2_ctrl *ctrl,
2287 union v4l2_ctrl_ptr ptr)
2293 if (ctrl->is_ptr && !ctrl->is_string) {
2296 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
2297 if (ret || !ctrl->is_array)
2299 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
2300 ctrl->type_ops->init(ctrl, idx, ptr);
2304 switch (ctrl->type) {
2305 case V4L2_CTRL_TYPE_INTEGER64:
2306 *ptr.p_s64 = c->value64;
2308 case V4L2_CTRL_TYPE_STRING:
2312 if (size > ctrl->maximum + 1)
2313 size = ctrl->maximum + 1;
2314 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
2316 char last = ptr.p_char[size - 1];
2318 ptr.p_char[size - 1] = 0;
2319 /* If the string was longer than ctrl->maximum,
2320 then return an error. */
2321 if (strlen(ptr.p_char) == ctrl->maximum && last)
2326 *ptr.p_s32 = c->value;
2332 /* Helper function: copy the caller-provider value as the new control value */
2333 static int user_to_new(struct v4l2_ext_control *c,
2334 struct v4l2_ctrl *ctrl)
2336 return user_to_ptr(c, ctrl, ctrl->p_new);
2339 /* Copy the one value to another. */
2340 static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
2341 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
2345 memcpy(to.p, from.p_const, ctrl->elems * ctrl->elem_size);
2348 /* Copy the new value to the current value. */
2349 static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
2356 /* has_changed is set by cluster_changed */
2357 changed = ctrl->has_changed;
2359 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
2361 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
2362 /* Note: CH_FLAGS is only set for auto clusters. */
2364 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
2365 if (!is_cur_manual(ctrl->cluster[0])) {
2366 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
2367 if (ctrl->cluster[0]->has_volatiles)
2368 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
2372 if (changed || ch_flags) {
2373 /* If a control was changed that was not one of the controls
2374 modified by the application, then send the event to all. */
2377 send_event(fh, ctrl,
2378 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
2379 if (ctrl->call_notify && changed && ctrl->handler->notify)
2380 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
2384 /* Copy the current value to the new value */
2385 static void cur_to_new(struct v4l2_ctrl *ctrl)
2389 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
2392 /* Copy the new value to the request value */
2393 static void new_to_req(struct v4l2_ctrl_ref *ref)
2397 ptr_to_ptr(ref->ctrl, ref->ctrl->p_new, ref->p_req);
2401 /* Copy the request value to the new value */
2402 static void req_to_new(struct v4l2_ctrl_ref *ref)
2407 ptr_to_ptr(ref->ctrl, ref->req->p_req, ref->ctrl->p_new);
2409 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->ctrl->p_new);
2412 /* Return non-zero if one or more of the controls in the cluster has a new
2413 value that differs from the current value. */
2414 static int cluster_changed(struct v4l2_ctrl *master)
2416 bool changed = false;
2420 for (i = 0; i < master->ncontrols; i++) {
2421 struct v4l2_ctrl *ctrl = master->cluster[i];
2422 bool ctrl_changed = false;
2427 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
2428 changed = ctrl_changed = true;
2431 * Set has_changed to false to avoid generating
2432 * the event V4L2_EVENT_CTRL_CH_VALUE
2434 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
2435 ctrl->has_changed = false;
2439 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
2440 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
2441 ctrl->p_cur, ctrl->p_new);
2442 ctrl->has_changed = ctrl_changed;
2443 changed |= ctrl->has_changed;
2448 /* Control range checking */
2449 static int check_range(enum v4l2_ctrl_type type,
2450 s64 min, s64 max, u64 step, s64 def)
2453 case V4L2_CTRL_TYPE_BOOLEAN:
2454 if (step != 1 || max > 1 || min < 0)
2457 case V4L2_CTRL_TYPE_U8:
2458 case V4L2_CTRL_TYPE_U16:
2459 case V4L2_CTRL_TYPE_U32:
2460 case V4L2_CTRL_TYPE_INTEGER:
2461 case V4L2_CTRL_TYPE_INTEGER64:
2462 if (step == 0 || min > max || def < min || def > max)
2465 case V4L2_CTRL_TYPE_BITMASK:
2466 if (step || min || !max || (def & ~max))
2469 case V4L2_CTRL_TYPE_MENU:
2470 case V4L2_CTRL_TYPE_INTEGER_MENU:
2471 if (min > max || def < min || def > max)
2473 /* Note: step == menu_skip_mask for menu controls.
2474 So here we check if the default value is masked out. */
2475 if (step && ((1 << def) & step))
2478 case V4L2_CTRL_TYPE_STRING:
2479 if (min > max || min < 0 || step < 1 || def)
2487 /* Validate a new control */
2488 static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
2493 for (idx = 0; !err && idx < ctrl->elems; idx++)
2494 err = ctrl->type_ops->validate(ctrl, idx, p_new);
2498 static inline u32 node2id(struct list_head *node)
2500 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
2503 /* Set the handler's error code if it wasn't set earlier already */
2504 static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
2506 if (hdl->error == 0)
2511 /* Initialize the handler */
2512 int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
2513 unsigned nr_of_controls_hint,
2514 struct lock_class_key *key, const char *name)
2516 mutex_init(&hdl->_lock);
2517 hdl->lock = &hdl->_lock;
2518 lockdep_set_class_and_name(hdl->lock, key, name);
2519 INIT_LIST_HEAD(&hdl->ctrls);
2520 INIT_LIST_HEAD(&hdl->ctrl_refs);
2521 INIT_LIST_HEAD(&hdl->requests);
2522 INIT_LIST_HEAD(&hdl->requests_queued);
2523 hdl->request_is_queued = false;
2524 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
2525 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
2526 sizeof(hdl->buckets[0]),
2527 GFP_KERNEL | __GFP_ZERO);
2528 hdl->error = hdl->buckets ? 0 : -ENOMEM;
2529 media_request_object_init(&hdl->req_obj);
2532 EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
2534 /* Free all controls and control refs */
2535 void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
2537 struct v4l2_ctrl_ref *ref, *next_ref;
2538 struct v4l2_ctrl *ctrl, *next_ctrl;
2539 struct v4l2_subscribed_event *sev, *next_sev;
2541 if (hdl == NULL || hdl->buckets == NULL)
2544 if (!hdl->req_obj.req && !list_empty(&hdl->requests)) {
2545 struct v4l2_ctrl_handler *req, *next_req;
2547 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) {
2548 media_request_object_unbind(&req->req_obj);
2549 media_request_object_put(&req->req_obj);
2552 mutex_lock(hdl->lock);
2553 /* Free all nodes */
2554 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
2555 list_del(&ref->node);
2558 /* Free all controls owned by the handler */
2559 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
2560 list_del(&ctrl->node);
2561 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
2562 list_del(&sev->node);
2565 kvfree(hdl->buckets);
2566 hdl->buckets = NULL;
2569 mutex_unlock(hdl->lock);
2570 mutex_destroy(&hdl->_lock);
2572 EXPORT_SYMBOL(v4l2_ctrl_handler_free);
2574 /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
2575 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
2576 with applications that do not use the NEXT_CTRL flag.
2578 We just find the n-th private user control. It's O(N), but that should not
2579 be an issue in this particular case. */
2580 static struct v4l2_ctrl_ref *find_private_ref(
2581 struct v4l2_ctrl_handler *hdl, u32 id)
2583 struct v4l2_ctrl_ref *ref;
2585 id -= V4L2_CID_PRIVATE_BASE;
2586 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2587 /* Search for private user controls that are compatible with
2589 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
2590 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
2591 if (!ref->ctrl->is_int)
2601 /* Find a control with the given ID. */
2602 static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
2604 struct v4l2_ctrl_ref *ref;
2607 id &= V4L2_CTRL_ID_MASK;
2609 /* Old-style private controls need special handling */
2610 if (id >= V4L2_CID_PRIVATE_BASE)
2611 return find_private_ref(hdl, id);
2612 bucket = id % hdl->nr_of_buckets;
2614 /* Simple optimization: cache the last control found */
2615 if (hdl->cached && hdl->cached->ctrl->id == id)
2618 /* Not in cache, search the hash */
2619 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
2620 while (ref && ref->ctrl->id != id)
2624 hdl->cached = ref; /* cache it! */
2628 /* Find a control with the given ID. Take the handler's lock first. */
2629 static struct v4l2_ctrl_ref *find_ref_lock(
2630 struct v4l2_ctrl_handler *hdl, u32 id)
2632 struct v4l2_ctrl_ref *ref = NULL;
2635 mutex_lock(hdl->lock);
2636 ref = find_ref(hdl, id);
2637 mutex_unlock(hdl->lock);
2642 /* Find a control with the given ID. */
2643 struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
2645 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
2647 return ref ? ref->ctrl : NULL;
2649 EXPORT_SYMBOL(v4l2_ctrl_find);
2651 /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
2652 static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
2653 struct v4l2_ctrl *ctrl,
2654 struct v4l2_ctrl_ref **ctrl_ref,
2655 bool from_other_dev, bool allocate_req)
2657 struct v4l2_ctrl_ref *ref;
2658 struct v4l2_ctrl_ref *new_ref;
2660 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
2661 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
2662 unsigned int size_extra_req = 0;
2668 * Automatically add the control class if it is not yet present and
2669 * the new control is not a compound control.
2671 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
2672 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
2673 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
2680 size_extra_req = ctrl->elems * ctrl->elem_size;
2681 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
2683 return handler_set_err(hdl, -ENOMEM);
2684 new_ref->ctrl = ctrl;
2685 new_ref->from_other_dev = from_other_dev;
2687 new_ref->p_req.p = &new_ref[1];
2689 INIT_LIST_HEAD(&new_ref->node);
2691 mutex_lock(hdl->lock);
2693 /* Add immediately at the end of the list if the list is empty, or if
2694 the last element in the list has a lower ID.
2695 This ensures that when elements are added in ascending order the
2696 insertion is an O(1) operation. */
2697 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
2698 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
2699 goto insert_in_hash;
2702 /* Find insert position in sorted list */
2703 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2704 if (ref->ctrl->id < id)
2706 /* Don't add duplicates */
2707 if (ref->ctrl->id == id) {
2711 list_add(&new_ref->node, ref->node.prev);
2716 /* Insert the control node in the hash */
2717 new_ref->next = hdl->buckets[bucket];
2718 hdl->buckets[bucket] = new_ref;
2720 *ctrl_ref = new_ref;
2721 if (ctrl->handler == hdl) {
2722 /* By default each control starts in a cluster of its own.
2723 * new_ref->ctrl is basically a cluster array with one
2724 * element, so that's perfect to use as the cluster pointer.
2725 * But only do this for the handler that owns the control.
2727 ctrl->cluster = &new_ref->ctrl;
2728 ctrl->ncontrols = 1;
2732 mutex_unlock(hdl->lock);
2736 /* Add a new control */
2737 static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
2738 const struct v4l2_ctrl_ops *ops,
2739 const struct v4l2_ctrl_type_ops *type_ops,
2740 u32 id, const char *name, enum v4l2_ctrl_type type,
2741 s64 min, s64 max, u64 step, s64 def,
2742 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
2743 u32 flags, const char * const *qmenu,
2744 const s64 *qmenu_int, const union v4l2_ctrl_ptr p_def,
2747 struct v4l2_ctrl *ctrl;
2749 unsigned nr_of_dims = 0;
2752 unsigned tot_ctrl_size;
2760 while (dims && dims[nr_of_dims]) {
2761 elems *= dims[nr_of_dims];
2763 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
2766 is_array = nr_of_dims > 0;
2768 /* Prefill elem_size for all types handled by std_type_ops */
2769 switch ((u32)type) {
2770 case V4L2_CTRL_TYPE_INTEGER64:
2771 elem_size = sizeof(s64);
2773 case V4L2_CTRL_TYPE_STRING:
2774 elem_size = max + 1;
2776 case V4L2_CTRL_TYPE_U8:
2777 elem_size = sizeof(u8);
2779 case V4L2_CTRL_TYPE_U16:
2780 elem_size = sizeof(u16);
2782 case V4L2_CTRL_TYPE_U32:
2783 elem_size = sizeof(u32);
2785 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
2786 elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
2788 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
2789 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
2791 case V4L2_CTRL_TYPE_FWHT_PARAMS:
2792 elem_size = sizeof(struct v4l2_ctrl_fwht_params);
2794 case V4L2_CTRL_TYPE_H264_SPS:
2795 elem_size = sizeof(struct v4l2_ctrl_h264_sps);
2797 case V4L2_CTRL_TYPE_H264_PPS:
2798 elem_size = sizeof(struct v4l2_ctrl_h264_pps);
2800 case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
2801 elem_size = sizeof(struct v4l2_ctrl_h264_scaling_matrix);
2803 case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
2804 elem_size = sizeof(struct v4l2_ctrl_h264_slice_params);
2806 case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
2807 elem_size = sizeof(struct v4l2_ctrl_h264_decode_params);
2809 case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
2810 elem_size = sizeof(struct v4l2_ctrl_h264_pred_weights);
2812 case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
2813 elem_size = sizeof(struct v4l2_ctrl_vp8_frame_header);
2815 case V4L2_CTRL_TYPE_HEVC_SPS:
2816 elem_size = sizeof(struct v4l2_ctrl_hevc_sps);
2818 case V4L2_CTRL_TYPE_HEVC_PPS:
2819 elem_size = sizeof(struct v4l2_ctrl_hevc_pps);
2821 case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
2822 elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
2824 case V4L2_CTRL_TYPE_AREA:
2825 elem_size = sizeof(struct v4l2_area);
2828 if (type < V4L2_CTRL_COMPOUND_TYPES)
2829 elem_size = sizeof(s32);
2832 tot_ctrl_size = elem_size * elems;
2835 if (id == 0 || name == NULL || !elem_size ||
2836 id >= V4L2_CID_PRIVATE_BASE ||
2837 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2838 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
2839 handler_set_err(hdl, -ERANGE);
2842 err = check_range(type, min, max, step, def);
2844 handler_set_err(hdl, err);
2848 (type == V4L2_CTRL_TYPE_BUTTON ||
2849 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2850 handler_set_err(hdl, -EINVAL);
2855 if (type == V4L2_CTRL_TYPE_BUTTON)
2856 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2857 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
2858 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2859 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2860 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2861 type == V4L2_CTRL_TYPE_STRING ||
2862 type >= V4L2_CTRL_COMPOUND_TYPES ||
2864 sz_extra += 2 * tot_ctrl_size;
2866 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const)
2867 sz_extra += elem_size;
2869 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
2871 handler_set_err(hdl, -ENOMEM);
2875 INIT_LIST_HEAD(&ctrl->node);
2876 INIT_LIST_HEAD(&ctrl->ev_subs);
2877 ctrl->handler = hdl;
2879 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
2883 ctrl->flags = flags;
2884 ctrl->minimum = min;
2885 ctrl->maximum = max;
2887 ctrl->default_value = def;
2888 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2889 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
2890 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
2891 ctrl->is_array = is_array;
2892 ctrl->elems = elems;
2893 ctrl->nr_of_dims = nr_of_dims;
2895 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
2896 ctrl->elem_size = elem_size;
2897 if (type == V4L2_CTRL_TYPE_MENU)
2898 ctrl->qmenu = qmenu;
2899 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2900 ctrl->qmenu_int = qmenu_int;
2902 ctrl->cur.val = ctrl->val = def;
2905 if (!ctrl->is_int) {
2906 ctrl->p_new.p = data;
2907 ctrl->p_cur.p = data + tot_ctrl_size;
2909 ctrl->p_new.p = &ctrl->val;
2910 ctrl->p_cur.p = &ctrl->cur.val;
2913 if (type >= V4L2_CTRL_COMPOUND_TYPES && p_def.p_const) {
2914 ctrl->p_def.p = ctrl->p_cur.p + tot_ctrl_size;
2915 memcpy(ctrl->p_def.p, p_def.p_const, elem_size);
2918 for (idx = 0; idx < elems; idx++) {
2919 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2920 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2923 if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
2927 mutex_lock(hdl->lock);
2928 list_add_tail(&ctrl->node, &hdl->ctrls);
2929 mutex_unlock(hdl->lock);
2933 struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2934 const struct v4l2_ctrl_config *cfg, void *priv)
2937 struct v4l2_ctrl *ctrl;
2938 const char *name = cfg->name;
2939 const char * const *qmenu = cfg->qmenu;
2940 const s64 *qmenu_int = cfg->qmenu_int;
2941 enum v4l2_ctrl_type type = cfg->type;
2942 u32 flags = cfg->flags;
2945 u64 step = cfg->step;
2949 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2952 is_menu = (type == V4L2_CTRL_TYPE_MENU ||
2953 type == V4L2_CTRL_TYPE_INTEGER_MENU);
2957 WARN_ON(cfg->menu_skip_mask);
2958 if (type == V4L2_CTRL_TYPE_MENU && !qmenu) {
2959 qmenu = v4l2_ctrl_get_menu(cfg->id);
2960 } else if (type == V4L2_CTRL_TYPE_INTEGER_MENU && !qmenu_int) {
2961 handler_set_err(hdl, -EINVAL);
2965 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
2967 is_menu ? cfg->menu_skip_mask : step, def,
2968 cfg->dims, cfg->elem_size,
2969 flags, qmenu, qmenu_int, cfg->p_def, priv);
2971 ctrl->is_private = cfg->is_private;
2974 EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2976 /* Helper function for standard non-menu controls */
2977 struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2978 const struct v4l2_ctrl_ops *ops,
2979 u32 id, s64 min, s64 max, u64 step, s64 def)
2982 enum v4l2_ctrl_type type;
2985 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2986 if (type == V4L2_CTRL_TYPE_MENU ||
2987 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2988 type >= V4L2_CTRL_COMPOUND_TYPES) {
2989 handler_set_err(hdl, -EINVAL);
2992 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
2993 min, max, step, def, NULL, 0,
2994 flags, NULL, NULL, ptr_null, NULL);
2996 EXPORT_SYMBOL(v4l2_ctrl_new_std);
2998 /* Helper function for standard menu controls */
2999 struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
3000 const struct v4l2_ctrl_ops *ops,
3001 u32 id, u8 _max, u64 mask, u8 _def)
3003 const char * const *qmenu = NULL;
3004 const s64 *qmenu_int = NULL;
3005 unsigned int qmenu_int_len = 0;
3007 enum v4l2_ctrl_type type;
3014 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3016 if (type == V4L2_CTRL_TYPE_MENU)
3017 qmenu = v4l2_ctrl_get_menu(id);
3018 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
3019 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
3021 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
3022 handler_set_err(hdl, -EINVAL);
3025 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3026 0, max, mask, def, NULL, 0,
3027 flags, qmenu, qmenu_int, ptr_null, NULL);
3029 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
3031 /* Helper function for standard menu controls with driver defined menu */
3032 struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
3033 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
3034 u64 mask, u8 _def, const char * const *qmenu)
3036 enum v4l2_ctrl_type type;
3044 /* v4l2_ctrl_new_std_menu_items() should only be called for
3045 * standard controls without a standard menu.
3047 if (v4l2_ctrl_get_menu(id)) {
3048 handler_set_err(hdl, -EINVAL);
3052 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3053 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
3054 handler_set_err(hdl, -EINVAL);
3057 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3058 0, max, mask, def, NULL, 0,
3059 flags, qmenu, NULL, ptr_null, NULL);
3062 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
3064 /* Helper function for standard compound controls */
3065 struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,
3066 const struct v4l2_ctrl_ops *ops, u32 id,
3067 const union v4l2_ctrl_ptr p_def)
3070 enum v4l2_ctrl_type type;
3072 s64 min, max, step, def;
3074 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3075 if (type < V4L2_CTRL_COMPOUND_TYPES) {
3076 handler_set_err(hdl, -EINVAL);
3079 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3080 min, max, step, def, NULL, 0,
3081 flags, NULL, NULL, p_def, NULL);
3083 EXPORT_SYMBOL(v4l2_ctrl_new_std_compound);
3085 /* Helper function for standard integer menu controls */
3086 struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
3087 const struct v4l2_ctrl_ops *ops,
3088 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
3091 enum v4l2_ctrl_type type;
3098 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
3099 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
3100 handler_set_err(hdl, -EINVAL);
3103 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
3104 0, max, 0, def, NULL, 0,
3105 flags, NULL, qmenu_int, ptr_null, NULL);
3107 EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
3109 /* Add the controls from another handler to our own. */
3110 int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
3111 struct v4l2_ctrl_handler *add,
3112 bool (*filter)(const struct v4l2_ctrl *ctrl),
3113 bool from_other_dev)
3115 struct v4l2_ctrl_ref *ref;
3118 /* Do nothing if either handler is NULL or if they are the same */
3119 if (!hdl || !add || hdl == add)
3123 mutex_lock(add->lock);
3124 list_for_each_entry(ref, &add->ctrl_refs, node) {
3125 struct v4l2_ctrl *ctrl = ref->ctrl;
3127 /* Skip handler-private controls. */
3128 if (ctrl->is_private)
3130 /* And control classes */
3131 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
3133 /* Filter any unwanted controls */
3134 if (filter && !filter(ctrl))
3136 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
3140 mutex_unlock(add->lock);
3143 EXPORT_SYMBOL(v4l2_ctrl_add_handler);
3145 bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
3147 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
3149 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3152 case V4L2_CID_AUDIO_MUTE:
3153 case V4L2_CID_AUDIO_VOLUME:
3154 case V4L2_CID_AUDIO_BALANCE:
3155 case V4L2_CID_AUDIO_BASS:
3156 case V4L2_CID_AUDIO_TREBLE:
3157 case V4L2_CID_AUDIO_LOUDNESS:
3164 EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
3166 /* Cluster controls */
3167 void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
3169 bool has_volatiles = false;
3172 /* The first control is the master control and it must not be NULL */
3173 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
3176 for (i = 0; i < ncontrols; i++) {
3178 controls[i]->cluster = controls;
3179 controls[i]->ncontrols = ncontrols;
3180 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
3181 has_volatiles = true;
3184 controls[0]->has_volatiles = has_volatiles;
3186 EXPORT_SYMBOL(v4l2_ctrl_cluster);
3188 void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
3189 u8 manual_val, bool set_volatile)
3191 struct v4l2_ctrl *master = controls[0];
3195 v4l2_ctrl_cluster(ncontrols, controls);
3196 WARN_ON(ncontrols <= 1);
3197 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
3198 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
3199 master->is_auto = true;
3200 master->has_volatiles = set_volatile;
3201 master->manual_mode_value = manual_val;
3202 master->flags |= V4L2_CTRL_FLAG_UPDATE;
3204 if (!is_cur_manual(master))
3205 flag = V4L2_CTRL_FLAG_INACTIVE |
3206 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
3208 for (i = 1; i < ncontrols; i++)
3210 controls[i]->flags |= flag;
3212 EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
3214 /* Activate/deactivate a control. */
3215 void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
3217 /* invert since the actual flag is called 'inactive' */
3218 bool inactive = !active;
3225 /* set V4L2_CTRL_FLAG_INACTIVE */
3226 old = test_and_set_bit(4, &ctrl->flags);
3228 /* clear V4L2_CTRL_FLAG_INACTIVE */
3229 old = test_and_clear_bit(4, &ctrl->flags);
3230 if (old != inactive)
3231 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
3233 EXPORT_SYMBOL(v4l2_ctrl_activate);
3235 void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
3242 lockdep_assert_held(ctrl->handler->lock);
3245 /* set V4L2_CTRL_FLAG_GRABBED */
3246 old = test_and_set_bit(1, &ctrl->flags);
3248 /* clear V4L2_CTRL_FLAG_GRABBED */
3249 old = test_and_clear_bit(1, &ctrl->flags);
3251 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
3253 EXPORT_SYMBOL(__v4l2_ctrl_grab);
3255 /* Log the control name and value */
3256 static void log_ctrl(const struct v4l2_ctrl *ctrl,
3257 const char *prefix, const char *colon)
3259 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
3261 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
3264 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
3266 ctrl->type_ops->log(ctrl);
3268 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
3269 V4L2_CTRL_FLAG_GRABBED |
3270 V4L2_CTRL_FLAG_VOLATILE)) {
3271 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
3272 pr_cont(" inactive");
3273 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
3274 pr_cont(" grabbed");
3275 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
3276 pr_cont(" volatile");
3281 /* Log all controls owned by the handler */
3282 void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
3285 struct v4l2_ctrl *ctrl;
3286 const char *colon = "";
3293 len = strlen(prefix);
3294 if (len && prefix[len - 1] != ' ')
3296 mutex_lock(hdl->lock);
3297 list_for_each_entry(ctrl, &hdl->ctrls, node)
3298 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
3299 log_ctrl(ctrl, prefix, colon);
3300 mutex_unlock(hdl->lock);
3302 EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
3304 int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
3306 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
3309 EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
3311 /* Call s_ctrl for all controls owned by the handler */
3312 int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
3314 struct v4l2_ctrl *ctrl;
3320 lockdep_assert_held(hdl->lock);
3322 list_for_each_entry(ctrl, &hdl->ctrls, node)
3325 list_for_each_entry(ctrl, &hdl->ctrls, node) {
3326 struct v4l2_ctrl *master = ctrl->cluster[0];
3329 /* Skip if this control was already handled by a cluster. */
3330 /* Skip button controls and read-only controls. */
3331 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
3332 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
3335 for (i = 0; i < master->ncontrols; i++) {
3336 if (master->cluster[i]) {
3337 cur_to_new(master->cluster[i]);
3338 master->cluster[i]->is_new = 1;
3339 master->cluster[i]->done = true;
3342 ret = call_op(master, s_ctrl);
3349 EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
3351 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
3358 mutex_lock(hdl->lock);
3359 ret = __v4l2_ctrl_handler_setup(hdl);
3360 mutex_unlock(hdl->lock);
3364 EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
3366 /* Implement VIDIOC_QUERY_EXT_CTRL */
3367 int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
3369 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
3370 u32 id = qc->id & V4L2_CTRL_ID_MASK;
3371 struct v4l2_ctrl_ref *ref;
3372 struct v4l2_ctrl *ctrl;
3377 mutex_lock(hdl->lock);
3379 /* Try to find it */
3380 ref = find_ref(hdl, id);
3382 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
3384 /* Match any control that is not hidden */
3388 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
3389 /* Match any hidden control */
3391 } else if ((qc->id & next_flags) == next_flags) {
3392 /* Match any control, compound or not */
3396 /* Find the next control with ID > qc->id */
3398 /* Did we reach the end of the control list? */
3399 if (id >= node2id(hdl->ctrl_refs.prev)) {
3400 ref = NULL; /* Yes, so there is no next control */
3402 /* We found a control with the given ID, so just get
3403 the next valid one in the list. */
3404 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
3405 is_compound = ref->ctrl->is_array ||
3406 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
3407 if (id < ref->ctrl->id &&
3408 (is_compound & mask) == match)
3411 if (&ref->node == &hdl->ctrl_refs)
3414 /* No control with the given ID exists, so start
3415 searching for the next largest ID. We know there
3416 is one, otherwise the first 'if' above would have
3418 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
3419 is_compound = ref->ctrl->is_array ||
3420 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
3421 if (id < ref->ctrl->id &&
3422 (is_compound & mask) == match)
3425 if (&ref->node == &hdl->ctrl_refs)
3429 mutex_unlock(hdl->lock);
3435 memset(qc, 0, sizeof(*qc));
3436 if (id >= V4L2_CID_PRIVATE_BASE)
3440 strscpy(qc->name, ctrl->name, sizeof(qc->name));
3441 qc->flags = user_flags(ctrl);
3442 qc->type = ctrl->type;
3443 qc->elem_size = ctrl->elem_size;
3444 qc->elems = ctrl->elems;
3445 qc->nr_of_dims = ctrl->nr_of_dims;
3446 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
3447 qc->minimum = ctrl->minimum;
3448 qc->maximum = ctrl->maximum;
3449 qc->default_value = ctrl->default_value;
3450 if (ctrl->type == V4L2_CTRL_TYPE_MENU
3451 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
3454 qc->step = ctrl->step;
3457 EXPORT_SYMBOL(v4l2_query_ext_ctrl);
3459 /* Implement VIDIOC_QUERYCTRL */
3460 int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
3462 struct v4l2_query_ext_ctrl qec = { qc->id };
3465 rc = v4l2_query_ext_ctrl(hdl, &qec);
3470 qc->type = qec.type;
3471 qc->flags = qec.flags;
3472 strscpy(qc->name, qec.name, sizeof(qc->name));
3474 case V4L2_CTRL_TYPE_INTEGER:
3475 case V4L2_CTRL_TYPE_BOOLEAN:
3476 case V4L2_CTRL_TYPE_MENU:
3477 case V4L2_CTRL_TYPE_INTEGER_MENU:
3478 case V4L2_CTRL_TYPE_STRING:
3479 case V4L2_CTRL_TYPE_BITMASK:
3480 qc->minimum = qec.minimum;
3481 qc->maximum = qec.maximum;
3482 qc->step = qec.step;
3483 qc->default_value = qec.default_value;
3489 qc->default_value = 0;
3494 EXPORT_SYMBOL(v4l2_queryctrl);
3496 /* Implement VIDIOC_QUERYMENU */
3497 int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
3499 struct v4l2_ctrl *ctrl;
3502 ctrl = v4l2_ctrl_find(hdl, qm->id);
3508 switch (ctrl->type) {
3509 case V4L2_CTRL_TYPE_MENU:
3510 if (ctrl->qmenu == NULL)
3513 case V4L2_CTRL_TYPE_INTEGER_MENU:
3514 if (ctrl->qmenu_int == NULL)
3521 if (i < ctrl->minimum || i > ctrl->maximum)
3524 /* Use mask to see if this menu item should be skipped */
3525 if (ctrl->menu_skip_mask & (1ULL << i))
3527 /* Empty menu items should also be skipped */
3528 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
3529 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
3531 strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
3533 qm->value = ctrl->qmenu_int[i];
3537 EXPORT_SYMBOL(v4l2_querymenu);
3539 static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
3540 const struct v4l2_ctrl_handler *from)
3542 struct v4l2_ctrl_ref *ref;
3545 if (WARN_ON(!hdl || hdl == from))
3551 WARN_ON(hdl->lock != &hdl->_lock);
3553 mutex_lock(from->lock);
3554 list_for_each_entry(ref, &from->ctrl_refs, node) {
3555 struct v4l2_ctrl *ctrl = ref->ctrl;
3556 struct v4l2_ctrl_ref *new_ref;
3558 /* Skip refs inherited from other devices */
3559 if (ref->from_other_dev)
3561 err = handler_new_ref(hdl, ctrl, &new_ref, false, true);
3565 mutex_unlock(from->lock);
3569 static void v4l2_ctrl_request_queue(struct media_request_object *obj)
3571 struct v4l2_ctrl_handler *hdl =
3572 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3573 struct v4l2_ctrl_handler *main_hdl = obj->priv;
3574 struct v4l2_ctrl_handler *prev_hdl = NULL;
3575 struct v4l2_ctrl_ref *ref_ctrl, *ref_ctrl_prev = NULL;
3577 mutex_lock(main_hdl->lock);
3578 if (list_empty(&main_hdl->requests_queued))
3581 prev_hdl = list_last_entry(&main_hdl->requests_queued,
3582 struct v4l2_ctrl_handler, requests_queued);
3584 * Note: prev_hdl and hdl must contain the same list of control
3585 * references, so if any differences are detected then that is a
3586 * driver bug and the WARN_ON is triggered.
3588 mutex_lock(prev_hdl->lock);
3589 ref_ctrl_prev = list_first_entry(&prev_hdl->ctrl_refs,
3590 struct v4l2_ctrl_ref, node);
3591 list_for_each_entry(ref_ctrl, &hdl->ctrl_refs, node) {
3594 while (ref_ctrl_prev->ctrl->id < ref_ctrl->ctrl->id) {
3595 /* Should never happen, but just in case... */
3596 if (list_is_last(&ref_ctrl_prev->node,
3597 &prev_hdl->ctrl_refs))
3599 ref_ctrl_prev = list_next_entry(ref_ctrl_prev, node);
3601 if (WARN_ON(ref_ctrl_prev->ctrl->id != ref_ctrl->ctrl->id))
3603 ref_ctrl->req = ref_ctrl_prev->req;
3605 mutex_unlock(prev_hdl->lock);
3607 list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued);
3608 hdl->request_is_queued = true;
3609 mutex_unlock(main_hdl->lock);
3612 static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
3614 struct v4l2_ctrl_handler *hdl =
3615 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3616 struct v4l2_ctrl_handler *main_hdl = obj->priv;
3618 list_del_init(&hdl->requests);
3619 mutex_lock(main_hdl->lock);
3620 if (hdl->request_is_queued) {
3621 list_del_init(&hdl->requests_queued);
3622 hdl->request_is_queued = false;
3624 mutex_unlock(main_hdl->lock);
3627 static void v4l2_ctrl_request_release(struct media_request_object *obj)
3629 struct v4l2_ctrl_handler *hdl =
3630 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3632 v4l2_ctrl_handler_free(hdl);
3636 static const struct media_request_object_ops req_ops = {
3637 .queue = v4l2_ctrl_request_queue,
3638 .unbind = v4l2_ctrl_request_unbind,
3639 .release = v4l2_ctrl_request_release,
3642 struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
3643 struct v4l2_ctrl_handler *parent)
3645 struct media_request_object *obj;
3647 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING &&
3648 req->state != MEDIA_REQUEST_STATE_QUEUED))
3651 obj = media_request_object_find(req, &req_ops, parent);
3653 return container_of(obj, struct v4l2_ctrl_handler, req_obj);
3656 EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find);
3659 v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
3661 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
3663 return (ref && ref->req == ref) ? ref->ctrl : NULL;
3665 EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find);
3667 static int v4l2_ctrl_request_bind(struct media_request *req,
3668 struct v4l2_ctrl_handler *hdl,
3669 struct v4l2_ctrl_handler *from)
3673 ret = v4l2_ctrl_request_clone(hdl, from);
3676 ret = media_request_object_bind(req, &req_ops,
3677 from, false, &hdl->req_obj);
3679 list_add_tail(&hdl->requests, &from->requests);
3684 /* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
3686 It is not a fully atomic operation, just best-effort only. After all, if
3687 multiple controls have to be set through multiple i2c writes (for example)
3688 then some initial writes may succeed while others fail. Thus leaving the
3689 system in an inconsistent state. The question is how much effort you are
3690 willing to spend on trying to make something atomic that really isn't.
3692 From the point of view of an application the main requirement is that
3693 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
3694 error should be returned without actually affecting any controls.
3696 If all the values are correct, then it is acceptable to just give up
3697 in case of low-level errors.
3699 It is important though that the application can tell when only a partial
3700 configuration was done. The way we do that is through the error_idx field
3701 of struct v4l2_ext_controls: if that is equal to the count field then no
3702 controls were affected. Otherwise all controls before that index were
3703 successful in performing their 'get' or 'set' operation, the control at
3704 the given index failed, and you don't know what happened with the controls
3705 after the failed one. Since if they were part of a control cluster they
3706 could have been successfully processed (if a cluster member was encountered
3707 at index < error_idx), they could have failed (if a cluster member was at
3708 error_idx), or they may not have been processed yet (if the first cluster
3709 member appeared after error_idx).
3711 It is all fairly theoretical, though. In practice all you can do is to
3712 bail out. If error_idx == count, then it is an application bug. If
3713 error_idx < count then it is only an application bug if the error code was
3714 EBUSY. That usually means that something started streaming just when you
3715 tried to set the controls. In all other cases it is a driver/hardware
3716 problem and all you can do is to retry or bail out.
3718 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
3719 never modifies controls the error_idx is just set to whatever control
3720 has an invalid value.
3723 /* Prepare for the extended g/s/try functions.
3724 Find the controls in the control array and do some basic checks. */
3725 static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
3726 struct v4l2_ext_controls *cs,
3727 struct v4l2_ctrl_helper *helpers,
3728 struct video_device *vdev,
3731 struct v4l2_ctrl_helper *h;
3732 bool have_clusters = false;
3735 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3736 struct v4l2_ext_control *c = &cs->controls[i];
3737 struct v4l2_ctrl_ref *ref;
3738 struct v4l2_ctrl *ctrl;
3739 u32 id = c->id & V4L2_CTRL_ID_MASK;
3744 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
3745 cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
3746 V4L2_CTRL_ID2WHICH(id) != cs->which) {
3748 "invalid which 0x%x or control id 0x%x\n",
3753 /* Old-style private controls are not allowed for
3754 extended controls */
3755 if (id >= V4L2_CID_PRIVATE_BASE) {
3757 "old-style private controls not allowed\n");
3760 ref = find_ref_lock(hdl, id);
3762 dprintk(vdev, "cannot find control id 0x%x\n", id);
3767 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) {
3768 dprintk(vdev, "control id 0x%x is disabled\n", id);
3772 if (ctrl->cluster[0]->ncontrols > 1)
3773 have_clusters = true;
3774 if (ctrl->cluster[0] != ctrl)
3775 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
3776 if (ctrl->is_ptr && !ctrl->is_string) {
3777 unsigned tot_size = ctrl->elems * ctrl->elem_size;
3779 if (c->size < tot_size) {
3781 * In the get case the application first
3782 * queries to obtain the size of the control.
3789 "pointer control id 0x%x size too small, %d bytes but %d bytes needed\n",
3790 id, c->size, tot_size);
3795 /* Store the ref to the master control of the cluster */
3797 /* Initially set next to 0, meaning that there is no other
3798 control in this helper array belonging to the same
3803 /* We are done if there were no controls that belong to a multi-
3808 /* The code below figures out in O(n) time which controls in the list
3809 belong to the same cluster. */
3811 /* This has to be done with the handler lock taken. */
3812 mutex_lock(hdl->lock);
3814 /* First zero the helper field in the master control references */
3815 for (i = 0; i < cs->count; i++)
3816 helpers[i].mref->helper = NULL;
3817 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3818 struct v4l2_ctrl_ref *mref = h->mref;
3820 /* If the mref->helper is set, then it points to an earlier
3821 helper that belongs to the same cluster. */
3823 /* Set the next field of mref->helper to the current
3824 index: this means that that earlier helper now
3825 points to the next helper in the same cluster. */
3826 mref->helper->next = i;
3827 /* mref should be set only for the first helper in the
3828 cluster, clear the others. */
3831 /* Point the mref helper to the current helper struct. */
3834 mutex_unlock(hdl->lock);
3838 /* Handles the corner case where cs->count == 0. It checks whether the
3839 specified control class exists. If that class ID is 0, then it checks
3840 whether there are any controls at all. */
3841 static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
3843 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL ||
3844 which == V4L2_CTRL_WHICH_REQUEST_VAL)
3846 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
3849 /* Get extended controls. Allocates the helpers array if needed. */
3850 static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
3851 struct v4l2_ext_controls *cs,
3852 struct video_device *vdev)
3854 struct v4l2_ctrl_helper helper[4];
3855 struct v4l2_ctrl_helper *helpers = helper;
3860 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
3862 cs->error_idx = cs->count;
3863 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
3869 return class_check(hdl, cs->which);
3871 if (cs->count > ARRAY_SIZE(helper)) {
3872 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3874 if (helpers == NULL)
3878 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, true);
3879 cs->error_idx = cs->count;
3881 for (i = 0; !ret && i < cs->count; i++)
3882 if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
3885 for (i = 0; !ret && i < cs->count; i++) {
3886 int (*ctrl_to_user)(struct v4l2_ext_control *c,
3887 struct v4l2_ctrl *ctrl);
3888 struct v4l2_ctrl *master;
3890 ctrl_to_user = def_value ? def_to_user : cur_to_user;
3892 if (helpers[i].mref == NULL)
3895 master = helpers[i].mref->ctrl;
3898 v4l2_ctrl_lock(master);
3900 /* g_volatile_ctrl will update the new control values */
3902 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
3903 (master->has_volatiles && !is_cur_manual(master)))) {
3904 for (j = 0; j < master->ncontrols; j++)
3905 cur_to_new(master->cluster[j]);
3906 ret = call_op(master, g_volatile_ctrl);
3907 ctrl_to_user = new_to_user;
3909 /* If OK, then copy the current (for non-volatile controls)
3910 or the new (for volatile controls) control values to the
3916 if (helpers[idx].ref->req)
3917 ret = req_to_user(cs->controls + idx,
3918 helpers[idx].ref->req);
3920 ret = ctrl_to_user(cs->controls + idx,
3921 helpers[idx].ref->ctrl);
3922 idx = helpers[idx].next;
3923 } while (!ret && idx);
3925 v4l2_ctrl_unlock(master);
3928 if (cs->count > ARRAY_SIZE(helper))
3933 static struct media_request_object *
3934 v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
3935 struct media_request *req, bool set)
3937 struct media_request_object *obj;
3938 struct v4l2_ctrl_handler *new_hdl;
3942 return ERR_CAST(req);
3944 if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
3945 return ERR_PTR(-EBUSY);
3947 obj = media_request_object_find(req, &req_ops, hdl);
3951 return ERR_PTR(-ENOENT);
3953 new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
3955 return ERR_PTR(-ENOMEM);
3957 obj = &new_hdl->req_obj;
3958 ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
3960 ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
3964 return ERR_PTR(ret);
3967 media_request_object_get(obj);
3971 int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct video_device *vdev,
3972 struct media_device *mdev, struct v4l2_ext_controls *cs)
3974 struct media_request_object *obj = NULL;
3975 struct media_request *req = NULL;
3978 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
3979 if (!mdev || cs->request_fd < 0)
3982 req = media_request_get_by_fd(mdev, cs->request_fd);
3984 return PTR_ERR(req);
3986 if (req->state != MEDIA_REQUEST_STATE_COMPLETE) {
3987 media_request_put(req);
3991 ret = media_request_lock_for_access(req);
3993 media_request_put(req);
3997 obj = v4l2_ctrls_find_req_obj(hdl, req, false);
3999 media_request_unlock_for_access(req);
4000 media_request_put(req);
4001 return PTR_ERR(obj);
4004 hdl = container_of(obj, struct v4l2_ctrl_handler,
4008 ret = v4l2_g_ext_ctrls_common(hdl, cs, vdev);
4011 media_request_unlock_for_access(req);
4012 media_request_object_put(obj);
4013 media_request_put(req);
4017 EXPORT_SYMBOL(v4l2_g_ext_ctrls);
4019 /* Helper function to get a single control */
4020 static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
4022 struct v4l2_ctrl *master = ctrl->cluster[0];
4026 /* Compound controls are not supported. The new_to_user() and
4027 * cur_to_user() calls below would need to be modified not to access
4028 * userspace memory when called from get_ctrl().
4030 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
4033 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
4036 v4l2_ctrl_lock(master);
4037 /* g_volatile_ctrl will update the current control values */
4038 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
4039 for (i = 0; i < master->ncontrols; i++)
4040 cur_to_new(master->cluster[i]);
4041 ret = call_op(master, g_volatile_ctrl);
4042 new_to_user(c, ctrl);
4044 cur_to_user(c, ctrl);
4046 v4l2_ctrl_unlock(master);
4050 int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
4052 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
4053 struct v4l2_ext_control c;
4056 if (ctrl == NULL || !ctrl->is_int)
4058 ret = get_ctrl(ctrl, &c);
4059 control->value = c.value;
4062 EXPORT_SYMBOL(v4l2_g_ctrl);
4064 s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
4066 struct v4l2_ext_control c;
4068 /* It's a driver bug if this happens. */
4069 if (WARN_ON(!ctrl->is_int))
4075 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
4077 s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
4079 struct v4l2_ext_control c;
4081 /* It's a driver bug if this happens. */
4082 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
4088 EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
4091 /* Core function that calls try/s_ctrl and ensures that the new value is
4092 copied to the current value on a set.
4093 Must be called with ctrl->handler->lock held. */
4094 static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
4095 bool set, u32 ch_flags)
4101 /* Go through the cluster and either validate the new value or
4102 (if no new value was set), copy the current value to the new
4103 value, ensuring a consistent view for the control ops when
4105 for (i = 0; i < master->ncontrols; i++) {
4106 struct v4l2_ctrl *ctrl = master->cluster[i];
4111 if (!ctrl->is_new) {
4115 /* Check again: it may have changed since the
4116 previous check in try_or_set_ext_ctrls(). */
4117 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
4121 ret = call_op(master, try_ctrl);
4123 /* Don't set if there is no change */
4124 if (ret || !set || !cluster_changed(master))
4126 ret = call_op(master, s_ctrl);
4130 /* If OK, then make the new values permanent. */
4131 update_flag = is_cur_manual(master) != is_new_manual(master);
4133 for (i = 0; i < master->ncontrols; i++) {
4135 * If we switch from auto to manual mode, and this cluster
4136 * contains volatile controls, then all non-master controls
4137 * have to be marked as changed. The 'new' value contains
4138 * the volatile value (obtained by update_from_auto_cluster),
4139 * which now has to become the current value.
4141 if (i && update_flag && is_new_manual(master) &&
4142 master->has_volatiles && master->cluster[i])
4143 master->cluster[i]->has_changed = true;
4145 new_to_cur(fh, master->cluster[i], ch_flags |
4146 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
4151 /* Validate controls. */
4152 static int validate_ctrls(struct v4l2_ext_controls *cs,
4153 struct v4l2_ctrl_helper *helpers,
4154 struct video_device *vdev,
4160 cs->error_idx = cs->count;
4161 for (i = 0; i < cs->count; i++) {
4162 struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
4163 union v4l2_ctrl_ptr p_new;
4167 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) {
4169 "control id 0x%x is read-only\n",
4173 /* This test is also done in try_set_control_cluster() which
4174 is called in atomic context, so that has the final say,
4175 but it makes sense to do an up-front check as well. Once
4176 an error occurs in try_set_control_cluster() some other
4177 controls may have been set already and we want to do a
4178 best-effort to avoid that. */
4179 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) {
4181 "control id 0x%x is grabbed, cannot set\n",
4186 * Skip validation for now if the payload needs to be copied
4187 * from userspace into kernelspace. We'll validate those later.
4191 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4192 p_new.p_s64 = &cs->controls[i].value64;
4194 p_new.p_s32 = &cs->controls[i].value;
4195 ret = validate_new(ctrl, p_new);
4202 /* Obtain the current volatile values of an autocluster and mark them
4204 static void update_from_auto_cluster(struct v4l2_ctrl *master)
4208 for (i = 1; i < master->ncontrols; i++)
4209 cur_to_new(master->cluster[i]);
4210 if (!call_op(master, g_volatile_ctrl))
4211 for (i = 1; i < master->ncontrols; i++)
4212 if (master->cluster[i])
4213 master->cluster[i]->is_new = 1;
4216 /* Try or try-and-set controls */
4217 static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
4218 struct v4l2_ctrl_handler *hdl,
4219 struct v4l2_ext_controls *cs,
4220 struct video_device *vdev, bool set)
4222 struct v4l2_ctrl_helper helper[4];
4223 struct v4l2_ctrl_helper *helpers = helper;
4227 cs->error_idx = cs->count;
4229 /* Default value cannot be changed */
4230 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL) {
4231 dprintk(vdev, "%s: cannot change default value\n",
4232 video_device_node_name(vdev));
4236 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
4239 dprintk(vdev, "%s: invalid null control handler\n",
4240 video_device_node_name(vdev));
4245 return class_check(hdl, cs->which);
4247 if (cs->count > ARRAY_SIZE(helper)) {
4248 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
4253 ret = prepare_ext_ctrls(hdl, cs, helpers, vdev, false);
4255 ret = validate_ctrls(cs, helpers, vdev, set);
4257 cs->error_idx = cs->count;
4258 for (i = 0; !ret && i < cs->count; i++) {
4259 struct v4l2_ctrl *master;
4262 if (helpers[i].mref == NULL)
4266 master = helpers[i].mref->ctrl;
4267 v4l2_ctrl_lock(master);
4269 /* Reset the 'is_new' flags of the cluster */
4270 for (j = 0; j < master->ncontrols; j++)
4271 if (master->cluster[j])
4272 master->cluster[j]->is_new = 0;
4274 /* For volatile autoclusters that are currently in auto mode
4275 we need to discover if it will be set to manual mode.
4276 If so, then we have to copy the current volatile values
4277 first since those will become the new manual values (which
4278 may be overwritten by explicit new values from this set
4280 if (master->is_auto && master->has_volatiles &&
4281 !is_cur_manual(master)) {
4282 /* Pick an initial non-manual value */
4283 s32 new_auto_val = master->manual_mode_value + 1;
4287 /* Check if the auto control is part of the
4288 list, and remember the new value. */
4289 if (helpers[tmp_idx].ref->ctrl == master)
4290 new_auto_val = cs->controls[tmp_idx].value;
4291 tmp_idx = helpers[tmp_idx].next;
4293 /* If the new value == the manual value, then copy
4294 the current volatile values. */
4295 if (new_auto_val == master->manual_mode_value)
4296 update_from_auto_cluster(master);
4299 /* Copy the new caller-supplied control values.
4300 user_to_new() sets 'is_new' to 1. */
4302 struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;
4304 ret = user_to_new(cs->controls + idx, ctrl);
4305 if (!ret && ctrl->is_ptr) {
4306 ret = validate_new(ctrl, ctrl->p_new);
4309 "failed to validate control %s (%d)\n",
4310 v4l2_ctrl_get_name(ctrl->id), ret);
4312 idx = helpers[idx].next;
4313 } while (!ret && idx);
4316 ret = try_or_set_cluster(fh, master,
4317 !hdl->req_obj.req && set, 0);
4318 if (!ret && hdl->req_obj.req && set) {
4319 for (j = 0; j < master->ncontrols; j++) {
4320 struct v4l2_ctrl_ref *ref =
4321 find_ref(hdl, master->cluster[j]->id);
4327 /* Copy the new values back to userspace. */
4331 ret = new_to_user(cs->controls + idx,
4332 helpers[idx].ref->ctrl);
4333 idx = helpers[idx].next;
4334 } while (!ret && idx);
4336 v4l2_ctrl_unlock(master);
4339 if (cs->count > ARRAY_SIZE(helper))
4344 static int try_set_ext_ctrls(struct v4l2_fh *fh,
4345 struct v4l2_ctrl_handler *hdl,
4346 struct video_device *vdev,
4347 struct media_device *mdev,
4348 struct v4l2_ext_controls *cs, bool set)
4350 struct media_request_object *obj = NULL;
4351 struct media_request *req = NULL;
4354 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
4356 dprintk(vdev, "%s: missing media device\n",
4357 video_device_node_name(vdev));
4361 if (cs->request_fd < 0) {
4362 dprintk(vdev, "%s: invalid request fd %d\n",
4363 video_device_node_name(vdev), cs->request_fd);
4367 req = media_request_get_by_fd(mdev, cs->request_fd);
4369 dprintk(vdev, "%s: cannot find request fd %d\n",
4370 video_device_node_name(vdev), cs->request_fd);
4371 return PTR_ERR(req);
4374 ret = media_request_lock_for_update(req);
4376 dprintk(vdev, "%s: cannot lock request fd %d\n",
4377 video_device_node_name(vdev), cs->request_fd);
4378 media_request_put(req);
4382 obj = v4l2_ctrls_find_req_obj(hdl, req, set);
4385 "%s: cannot find request object for request fd %d\n",
4386 video_device_node_name(vdev),
4388 media_request_unlock_for_update(req);
4389 media_request_put(req);
4390 return PTR_ERR(obj);
4392 hdl = container_of(obj, struct v4l2_ctrl_handler,
4396 ret = try_set_ext_ctrls_common(fh, hdl, cs, vdev, set);
4399 "%s: try_set_ext_ctrls_common failed (%d)\n",
4400 video_device_node_name(vdev), ret);
4403 media_request_unlock_for_update(req);
4404 media_request_object_put(obj);
4405 media_request_put(req);
4411 int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
4412 struct video_device *vdev,
4413 struct media_device *mdev,
4414 struct v4l2_ext_controls *cs)
4416 return try_set_ext_ctrls(NULL, hdl, vdev, mdev, cs, false);
4418 EXPORT_SYMBOL(v4l2_try_ext_ctrls);
4420 int v4l2_s_ext_ctrls(struct v4l2_fh *fh,
4421 struct v4l2_ctrl_handler *hdl,
4422 struct video_device *vdev,
4423 struct media_device *mdev,
4424 struct v4l2_ext_controls *cs)
4426 return try_set_ext_ctrls(fh, hdl, vdev, mdev, cs, true);
4428 EXPORT_SYMBOL(v4l2_s_ext_ctrls);
4430 /* Helper function for VIDIOC_S_CTRL compatibility */
4431 static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
4433 struct v4l2_ctrl *master = ctrl->cluster[0];
4437 /* Reset the 'is_new' flags of the cluster */
4438 for (i = 0; i < master->ncontrols; i++)
4439 if (master->cluster[i])
4440 master->cluster[i]->is_new = 0;
4442 ret = validate_new(ctrl, ctrl->p_new);
4446 /* For autoclusters with volatiles that are switched from auto to
4447 manual mode we have to update the current volatile values since
4448 those will become the initial manual values after such a switch. */
4449 if (master->is_auto && master->has_volatiles && ctrl == master &&
4450 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
4451 update_from_auto_cluster(master);
4454 return try_or_set_cluster(fh, master, true, ch_flags);
4457 /* Helper function for VIDIOC_S_CTRL compatibility */
4458 static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
4459 struct v4l2_ext_control *c)
4463 v4l2_ctrl_lock(ctrl);
4464 user_to_new(c, ctrl);
4465 ret = set_ctrl(fh, ctrl, 0);
4467 cur_to_user(c, ctrl);
4468 v4l2_ctrl_unlock(ctrl);
4472 int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
4473 struct v4l2_control *control)
4475 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
4476 struct v4l2_ext_control c = { control->id };
4479 if (ctrl == NULL || !ctrl->is_int)
4482 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
4485 c.value = control->value;
4486 ret = set_ctrl_lock(fh, ctrl, &c);
4487 control->value = c.value;
4490 EXPORT_SYMBOL(v4l2_s_ctrl);
4492 int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
4494 lockdep_assert_held(ctrl->handler->lock);
4496 /* It's a driver bug if this happens. */
4497 if (WARN_ON(!ctrl->is_int))
4500 return set_ctrl(NULL, ctrl, 0);
4502 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
4504 int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
4506 lockdep_assert_held(ctrl->handler->lock);
4508 /* It's a driver bug if this happens. */
4509 if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64))
4511 *ctrl->p_new.p_s64 = val;
4512 return set_ctrl(NULL, ctrl, 0);
4514 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
4516 int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
4518 lockdep_assert_held(ctrl->handler->lock);
4520 /* It's a driver bug if this happens. */
4521 if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING))
4523 strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
4524 return set_ctrl(NULL, ctrl, 0);
4526 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
4528 int __v4l2_ctrl_s_ctrl_compound(struct v4l2_ctrl *ctrl,
4529 enum v4l2_ctrl_type type, const void *p)
4531 lockdep_assert_held(ctrl->handler->lock);
4533 /* It's a driver bug if this happens. */
4534 if (WARN_ON(ctrl->type != type))
4536 memcpy(ctrl->p_new.p, p, ctrl->elems * ctrl->elem_size);
4537 return set_ctrl(NULL, ctrl, 0);
4539 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_compound);
4541 void v4l2_ctrl_request_complete(struct media_request *req,
4542 struct v4l2_ctrl_handler *main_hdl)
4544 struct media_request_object *obj;
4545 struct v4l2_ctrl_handler *hdl;
4546 struct v4l2_ctrl_ref *ref;
4548 if (!req || !main_hdl)
4552 * Note that it is valid if nothing was found. It means
4553 * that this request doesn't have any controls and so just
4554 * wants to leave the controls unchanged.
4556 obj = media_request_object_find(req, &req_ops, main_hdl);
4559 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
4561 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
4562 struct v4l2_ctrl *ctrl = ref->ctrl;
4563 struct v4l2_ctrl *master = ctrl->cluster[0];
4566 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
4569 v4l2_ctrl_lock(master);
4570 /* g_volatile_ctrl will update the current control values */
4571 for (i = 0; i < master->ncontrols; i++)
4572 cur_to_new(master->cluster[i]);
4573 call_op(master, g_volatile_ctrl);
4575 v4l2_ctrl_unlock(master);
4578 if (ref->req == ref)
4581 v4l2_ctrl_lock(ctrl);
4583 ptr_to_ptr(ctrl, ref->req->p_req, ref->p_req);
4585 ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req);
4587 * Set ref->req to ensure that when userspace wants to
4588 * obtain the controls of this request it will take
4589 * this value and not the current value of the control.
4593 v4l2_ctrl_unlock(ctrl);
4596 mutex_lock(main_hdl->lock);
4597 WARN_ON(!hdl->request_is_queued);
4598 list_del_init(&hdl->requests_queued);
4599 hdl->request_is_queued = false;
4600 mutex_unlock(main_hdl->lock);
4601 media_request_object_complete(obj);
4602 media_request_object_put(obj);
4604 EXPORT_SYMBOL(v4l2_ctrl_request_complete);
4606 int v4l2_ctrl_request_setup(struct media_request *req,
4607 struct v4l2_ctrl_handler *main_hdl)
4609 struct media_request_object *obj;
4610 struct v4l2_ctrl_handler *hdl;
4611 struct v4l2_ctrl_ref *ref;
4614 if (!req || !main_hdl)
4617 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
4621 * Note that it is valid if nothing was found. It means
4622 * that this request doesn't have any controls and so just
4623 * wants to leave the controls unchanged.
4625 obj = media_request_object_find(req, &req_ops, main_hdl);
4628 if (obj->completed) {
4629 media_request_object_put(obj);
4632 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
4634 list_for_each_entry(ref, &hdl->ctrl_refs, node)
4635 ref->req_done = false;
4637 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
4638 struct v4l2_ctrl *ctrl = ref->ctrl;
4639 struct v4l2_ctrl *master = ctrl->cluster[0];
4640 bool have_new_data = false;
4644 * Skip if this control was already handled by a cluster.
4645 * Skip button controls and read-only controls.
4647 if (ref->req_done || (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
4650 v4l2_ctrl_lock(master);
4651 for (i = 0; i < master->ncontrols; i++) {
4652 if (master->cluster[i]) {
4653 struct v4l2_ctrl_ref *r =
4654 find_ref(hdl, master->cluster[i]->id);
4656 if (r->req && r == r->req) {
4657 have_new_data = true;
4662 if (!have_new_data) {
4663 v4l2_ctrl_unlock(master);
4667 for (i = 0; i < master->ncontrols; i++) {
4668 if (master->cluster[i]) {
4669 struct v4l2_ctrl_ref *r =
4670 find_ref(hdl, master->cluster[i]->id);
4673 master->cluster[i]->is_new = 1;
4678 * For volatile autoclusters that are currently in auto mode
4679 * we need to discover if it will be set to manual mode.
4680 * If so, then we have to copy the current volatile values
4681 * first since those will become the new manual values (which
4682 * may be overwritten by explicit new values from this set
4685 if (master->is_auto && master->has_volatiles &&
4686 !is_cur_manual(master)) {
4687 s32 new_auto_val = *master->p_new.p_s32;
4690 * If the new value == the manual value, then copy
4691 * the current volatile values.
4693 if (new_auto_val == master->manual_mode_value)
4694 update_from_auto_cluster(master);
4697 ret = try_or_set_cluster(NULL, master, true, 0);
4698 v4l2_ctrl_unlock(master);
4704 media_request_object_put(obj);
4707 EXPORT_SYMBOL(v4l2_ctrl_request_setup);
4709 void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
4713 if (notify == NULL) {
4714 ctrl->call_notify = 0;
4717 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
4719 ctrl->handler->notify = notify;
4720 ctrl->handler->notify_priv = priv;
4721 ctrl->call_notify = 1;
4723 EXPORT_SYMBOL(v4l2_ctrl_notify);
4725 int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
4726 s64 min, s64 max, u64 step, s64 def)
4729 bool range_changed = false;
4732 lockdep_assert_held(ctrl->handler->lock);
4734 switch (ctrl->type) {
4735 case V4L2_CTRL_TYPE_INTEGER:
4736 case V4L2_CTRL_TYPE_INTEGER64:
4737 case V4L2_CTRL_TYPE_BOOLEAN:
4738 case V4L2_CTRL_TYPE_MENU:
4739 case V4L2_CTRL_TYPE_INTEGER_MENU:
4740 case V4L2_CTRL_TYPE_BITMASK:
4741 case V4L2_CTRL_TYPE_U8:
4742 case V4L2_CTRL_TYPE_U16:
4743 case V4L2_CTRL_TYPE_U32:
4746 ret = check_range(ctrl->type, min, max, step, def);
4753 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
4754 (ctrl->step != step) || ctrl->default_value != def) {
4755 range_changed = true;
4756 ctrl->minimum = min;
4757 ctrl->maximum = max;
4759 ctrl->default_value = def;
4762 if (validate_new(ctrl, ctrl->p_new)) {
4763 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4764 *ctrl->p_new.p_s64 = def;
4766 *ctrl->p_new.p_s32 = def;
4769 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4770 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
4772 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
4774 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
4775 else if (range_changed)
4776 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
4779 EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
4781 static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
4783 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4788 v4l2_ctrl_lock(ctrl);
4789 list_add_tail(&sev->node, &ctrl->ev_subs);
4790 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
4791 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
4792 struct v4l2_event ev;
4793 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
4795 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
4796 changes |= V4L2_EVENT_CTRL_CH_VALUE;
4797 fill_event(&ev, ctrl, changes);
4798 /* Mark the queue as active, allowing this initial
4799 event to be accepted. */
4801 v4l2_event_queue_fh(sev->fh, &ev);
4803 v4l2_ctrl_unlock(ctrl);
4807 static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
4809 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4814 v4l2_ctrl_lock(ctrl);
4815 list_del(&sev->node);
4816 v4l2_ctrl_unlock(ctrl);
4819 void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
4821 u32 old_changes = old->u.ctrl.changes;
4823 old->u.ctrl = new->u.ctrl;
4824 old->u.ctrl.changes |= old_changes;
4826 EXPORT_SYMBOL(v4l2_ctrl_replace);
4828 void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
4830 new->u.ctrl.changes |= old->u.ctrl.changes;
4832 EXPORT_SYMBOL(v4l2_ctrl_merge);
4834 const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
4835 .add = v4l2_ctrl_add_event,
4836 .del = v4l2_ctrl_del_event,
4837 .replace = v4l2_ctrl_replace,
4838 .merge = v4l2_ctrl_merge,
4840 EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
4842 int v4l2_ctrl_log_status(struct file *file, void *fh)
4844 struct video_device *vfd = video_devdata(file);
4845 struct v4l2_fh *vfh = file->private_data;
4847 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
4848 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
4849 vfd->v4l2_dev->name);
4852 EXPORT_SYMBOL(v4l2_ctrl_log_status);
4854 int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
4855 const struct v4l2_event_subscription *sub)
4857 if (sub->type == V4L2_EVENT_CTRL)
4858 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
4861 EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
4863 int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
4864 struct v4l2_event_subscription *sub)
4866 if (!sd->ctrl_handler)
4868 return v4l2_ctrl_subscribe_event(fh, sub);
4870 EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
4872 __poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
4874 struct v4l2_fh *fh = file->private_data;
4876 poll_wait(file, &fh->wait, wait);
4877 if (v4l2_event_pending(fh))
4881 EXPORT_SYMBOL(v4l2_ctrl_poll);
4883 int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
4884 const struct v4l2_ctrl_ops *ctrl_ops,
4885 const struct v4l2_fwnode_device_properties *p)
4887 if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) {
4888 u32 orientation_ctrl;
4890 switch (p->orientation) {
4891 case V4L2_FWNODE_ORIENTATION_FRONT:
4892 orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT;
4894 case V4L2_FWNODE_ORIENTATION_BACK:
4895 orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK;
4897 case V4L2_FWNODE_ORIENTATION_EXTERNAL:
4898 orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL;
4903 if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,
4904 V4L2_CID_CAMERA_ORIENTATION,
4905 V4L2_CAMERA_ORIENTATION_EXTERNAL, 0,
4910 if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) {
4911 if (!v4l2_ctrl_new_std(hdl, ctrl_ops,
4912 V4L2_CID_CAMERA_SENSOR_ROTATION,
4913 p->rotation, p->rotation, 1,
4920 EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);