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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[linux-block.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
0996517c
HV		 2/*
3 V4L2 controls framework implementation.
4
5 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
6
0996517c
HV		 7 */
8
9#include <linux/ctype.h>
758d90e1 10#include <linux/mm.h>
2b80163c 11#include <linux/slab.h>
35a24636 12#include <linux/export.h>
0996517c
HV		 13#include <media/v4l2-ioctl.h>
14#include <media/v4l2-device.h>
15#include <media/v4l2-ctrls.h>
6e239399 16#include <media/v4l2-event.h>
0996517c
HV		 17#include <media/v4l2-dev.h>
18
ddac5c10
HV		 19#define has_op(master, op) \
20 (master->ops && master->ops->op)
54c911eb 21#define call_op(master, op) \
ddac5c10 22 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 23
0996517c 24/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 25struct v4l2_ctrl_helper {
26 /* Pointer to the control reference of the master control */
27 struct v4l2_ctrl_ref *mref;
dcea5601
HV		 28 /* The control ref corresponding to the v4l2_ext_control ID field. */
29 struct v4l2_ctrl_ref *ref;
eb5b16ef
HV		 30 /* v4l2_ext_control index of the next control belonging to the
31 same cluster, or 0 if there isn't any. */
32 u32 next;
0996517c
HV		 33};
34
72d877ca 35/* Small helper function to determine if the autocluster is set to manual
88365105 36 mode. */
72d877ca
HV		 37static bool is_cur_manual(const struct v4l2_ctrl *master)
38{
39 return master->is_auto && master->cur.val == master->manual_mode_value;
40}
41
42/* Same as above, but this checks the against the new value instead of the
43 current value. */
44static bool is_new_manual(const struct v4l2_ctrl *master)
45{
46 return master->is_auto && master->val == master->manual_mode_value;
47}
48
0996517c
HV		 49/* Returns NULL or a character pointer array containing the menu for
50 the given control ID. The pointer array ends with a NULL pointer.
51 An empty string signifies a menu entry that is invalid. This allows
52 drivers to disable certain options if it is not supported. */
513521ea 53const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 54{
513521ea 55 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 56 "44.1 kHz",
57 "48 kHz",
58 "32 kHz",
59 NULL
60 };
513521ea 61 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 62 "MPEG-1/2 Layer I",
63 "MPEG-1/2 Layer II",
64 "MPEG-1/2 Layer III",
65 "MPEG-2/4 AAC",
66 "AC-3",
67 NULL
68 };
513521ea 69 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 70 "32 kbps",
71 "64 kbps",
72 "96 kbps",
73 "128 kbps",
74 "160 kbps",
75 "192 kbps",
76 "224 kbps",
77 "256 kbps",
78 "288 kbps",
79 "320 kbps",
80 "352 kbps",
81 "384 kbps",
82 "416 kbps",
83 "448 kbps",
84 NULL
85 };
513521ea 86 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 87 "32 kbps",
88 "48 kbps",
89 "56 kbps",
90 "64 kbps",
91 "80 kbps",
92 "96 kbps",
93 "112 kbps",
94 "128 kbps",
95 "160 kbps",
96 "192 kbps",
97 "224 kbps",
98 "256 kbps",
99 "320 kbps",
100 "384 kbps",
101 NULL
102 };
513521ea 103 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 104 "32 kbps",
105 "40 kbps",
106 "48 kbps",
107 "56 kbps",
108 "64 kbps",
109 "80 kbps",
110 "96 kbps",
111 "112 kbps",
112 "128 kbps",
113 "160 kbps",
114 "192 kbps",
115 "224 kbps",
116 "256 kbps",
117 "320 kbps",
118 NULL
119 };
513521ea 120 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 121 "32 kbps",
122 "40 kbps",
123 "48 kbps",
124 "56 kbps",
125 "64 kbps",
126 "80 kbps",
127 "96 kbps",
128 "112 kbps",
129 "128 kbps",
130 "160 kbps",
131 "192 kbps",
132 "224 kbps",
133 "256 kbps",
134 "320 kbps",
135 "384 kbps",
136 "448 kbps",
137 "512 kbps",
138 "576 kbps",
139 "640 kbps",
140 NULL
141 };
513521ea 142 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 143 "Stereo",
144 "Joint Stereo",
145 "Dual",
146 "Mono",
147 NULL
148 };
513521ea 149 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 150 "Bound 4",
151 "Bound 8",
152 "Bound 12",
153 "Bound 16",
154 NULL
155 };
513521ea 156 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 157 "No Emphasis",
158 "50/15 us",
159 "CCITT J17",
160 NULL
161 };
513521ea 162 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 163 "No CRC",
164 "16-bit CRC",
165 NULL
166 };
24c19a21
HV		 167 static const char * const mpeg_audio_dec_playback[] = {
168 "Auto",
169 "Stereo",
170 "Left",
171 "Right",
172 "Mono",
173 "Swapped Stereo",
174 NULL
175 };
513521ea 176 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 177 "MPEG-1",
178 "MPEG-2",
179 "MPEG-4 AVC",
180 NULL
181 };
513521ea 182 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 183 "1x1",
184 "4x3",
185 "16x9",
186 "2.21x1",
187 NULL
188 };
513521ea 189 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 190 "Variable Bitrate",
191 "Constant Bitrate",
192 NULL
193 };
513521ea 194 static const char * const mpeg_stream_type[] = {
0996517c
HV		 195 "MPEG-2 Program Stream",
196 "MPEG-2 Transport Stream",
197 "MPEG-1 System Stream",
198 "MPEG-2 DVD-compatible Stream",
199 "MPEG-1 VCD-compatible Stream",
200 "MPEG-2 SVCD-compatible Stream",
201 NULL
202 };
513521ea 203 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 204 "No VBI",
064f5096 205 "Private Packet, IVTV Format",
0996517c
HV		 206 NULL
207 };
513521ea 208 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 209 "Disabled",
210 "50 Hz",
211 "60 Hz",
d26a6635 212 "Auto",
0996517c
HV		 213 NULL
214 };
513521ea 215 static const char * const camera_exposure_auto[] = {
0996517c
HV		 216 "Auto Mode",
217 "Manual Mode",
218 "Shutter Priority Mode",
219 "Aperture Priority Mode",
220 NULL
221 };
cf072139
SN		 222 static const char * const camera_exposure_metering[] = {
223 "Average",
224 "Center Weighted",
225 "Spot",
fc39f46b 226 "Matrix",
cf072139
SN		 227 NULL
228 };
2272ab65
SN		 229 static const char * const camera_auto_focus_range[] = {
230 "Auto",
231 "Normal",
232 "Macro",
233 "Infinity",
234 NULL
235 };
513521ea 236 static const char * const colorfx[] = {
0996517c
HV		 237 "None",
238 "Black & White",
239 "Sepia",
240 "Negative",
241 "Emboss",
242 "Sketch",
064f5096
KD		 243 "Sky Blue",
244 "Grass Green",
245 "Skin Whiten",
0996517c 246 "Vivid",
6491d1ad
SN		 247 "Aqua",
248 "Art Freeze",
249 "Silhouette",
250 "Solarization",
251 "Antique",
252 "Set Cb/Cr",
0996517c
HV		 253 NULL
254 };
e40a0573
SN		 255 static const char * const auto_n_preset_white_balance[] = {
256 "Manual",
257 "Auto",
258 "Incandescent",
259 "Fluorescent",
260 "Fluorescent H",
261 "Horizon",
262 "Daylight",
263 "Flash",
264 "Cloudy",
265 "Shade",
266 NULL,
267 };
7f84ad8b
SN		 268 static const char * const camera_iso_sensitivity_auto[] = {
269 "Manual",
270 "Auto",
271 NULL
272 };
0bf6b7dc
SN		 273 static const char * const scene_mode[] = {
274 "None",
275 "Backlight",
276 "Beach/Snow",
277 "Candle Light",
278 "Dusk/Dawn",
279 "Fall Colors",
280 "Fireworks",
281 "Landscape",
282 "Night",
283 "Party/Indoor",
284 "Portrait",
285 "Sports",
286 "Sunset",
287 "Text",
288 NULL
289 };
aec330a8
AS		 290 static const char * const tune_emphasis[] = {
291 "None",
f769c260
HV		 292 "50 Microseconds",
293 "75 Microseconds",
0996517c
HV		 294 NULL,
295 };
064f5096
KD		 296 static const char * const header_mode[] = {
297 "Separate Buffer",
298 "Joined With 1st Frame",
299 NULL,
300 };
301 static const char * const multi_slice[] = {
302 "Single",
303 "Max Macroblocks",
304 "Max Bytes",
305 NULL,
306 };
307 static const char * const entropy_mode[] = {
308 "CAVLC",
309 "CABAC",
310 NULL,
311 };
312 static const char * const mpeg_h264_level[] = {
313 "1",
314 "1b",
315 "1.1",
316 "1.2",
317 "1.3",
318 "2",
319 "2.1",
320 "2.2",
321 "3",
322 "3.1",
323 "3.2",
324 "4",
325 "4.1",
326 "4.2",
327 "5",
328 "5.1",
329 NULL,
330 };
331 static const char * const h264_loop_filter[] = {
332 "Enabled",
333 "Disabled",
334 "Disabled at Slice Boundary",
335 NULL,
336 };
337 static const char * const h264_profile[] = {
338 "Baseline",
339 "Constrained Baseline",
340 "Main",
341 "Extended",
342 "High",
343 "High 10",
344 "High 422",
345 "High 444 Predictive",
346 "High 10 Intra",
347 "High 422 Intra",
348 "High 444 Intra",
349 "CAVLC 444 Intra",
350 "Scalable Baseline",
351 "Scalable High",
352 "Scalable High Intra",
15d6e91a 353 "Stereo High",
064f5096
KD		 354 "Multiview High",
355 NULL,
356 };
357 static const char * const vui_sar_idc[] = {
358 "Unspecified",
359 "1:1",
360 "12:11",
361 "10:11",
362 "16:11",
363 "40:33",
364 "24:11",
365 "20:11",
366 "32:11",
367 "80:33",
368 "18:11",
369 "15:11",
370 "64:33",
371 "160:99",
372 "4:3",
373 "3:2",
374 "2:1",
375 "Extended SAR",
376 NULL,
377 };
2e81dde9
AK		 378 static const char * const h264_fp_arrangement_type[] = {
379 "Checkerboard",
380 "Column",
381 "Row",
382 "Side by Side",
383 "Top Bottom",
384 "Temporal",
385 NULL,
386 };
387 static const char * const h264_fmo_map_type[] = {
388 "Interleaved Slices",
389 "Scattered Slices",
390 "Foreground with Leftover",
391 "Box Out",
392 "Raster Scan",
393 "Wipe Scan",
394 "Explicit",
395 NULL,
396 };
064f5096
KD		 397 static const char * const mpeg_mpeg4_level[] = {
398 "0",
399 "0b",
400 "1",
401 "2",
402 "3",
403 "3b",
404 "4",
405 "5",
406 NULL,
407 };
408 static const char * const mpeg4_profile[] = {
409 "Simple",
f769c260 410 "Advanced Simple",
064f5096
KD		 411 "Core",
412 "Simple Scalable",
39c1cb2b 413 "Advanced Coding Efficiency",
064f5096
KD		 414 NULL,
415 };
416
bc9028e1
AK		 417 static const char * const vpx_golden_frame_sel[] = {
418 "Use Previous Frame",
419 "Use Previous Specific Frame",
420 NULL,
421 };
5520b946
KW		 422 static const char * const vp8_profile[] = {
423 "0",
424 "1",
425 "2",
426 "3",
427 NULL,
428 };
2a75364d
KW		 429 static const char * const vp9_profile[] = {
430 "0",
431 "1",
432 "2",
433 "3",
434 NULL,
435 };
bc9028e1 436
0b159acd
SA		 437 static const char * const flash_led_mode[] = {
438 "Off",
439 "Flash",
440 "Torch",
441 NULL,
442 };
443 static const char * const flash_strobe_source[] = {
444 "Software",
445 "External",
446 NULL,
447 };
0996517c 448
c7361ae1
SN		 449 static const char * const jpeg_chroma_subsampling[] = {
450 "4:4:4",
451 "4:2:2",
452 "4:2:0",
453 "4:1:1",
454 "4:1:0",
455 "Gray",
456 NULL,
457 };
977ebec7
HV		 458 static const char * const dv_tx_mode[] = {
459 "DVI-D",
460 "HDMI",
461 NULL,
462 };
463 static const char * const dv_rgb_range[] = {
464 "Automatic",
f098268b
HV		 465 "RGB Limited Range (16-235)",
466 "RGB Full Range (0-255)",
977ebec7
HV		 467 NULL,
468 };
45cc29af
HV		 469 static const char * const dv_it_content_type[] = {
470 "Graphics",
471 "Photo",
472 "Cinema",
473 "Game",
474 "No IT Content",
475 NULL,
476 };
a77b4fc0
HV		 477 static const char * const detect_md_mode[] = {
478 "Disabled",
479 "Global",
480 "Threshold Grid",
481 "Region Grid",
482 NULL,
483 };
977ebec7 484
2c02837b
SM		 485 static const char * const hevc_profile[] = {
486 "Main",
487 "Main Still Picture",
488 "Main 10",
489 NULL,
490 };
491 static const char * const hevc_level[] = {
492 "1",
493 "2",
494 "2.1",
495 "3",
496 "3.1",
497 "4",
498 "4.1",
499 "5",
500 "5.1",
501 "5.2",
502 "6",
503 "6.1",
504 "6.2",
505 NULL,
506 };
507 static const char * const hevc_hierarchial_coding_type[] = {
508 "B",
509 "P",
510 NULL,
511 };
512 static const char * const hevc_refresh_type[] = {
513 "None",
514 "CRA",
515 "IDR",
516 NULL,
517 };
518 static const char * const hevc_size_of_length_field[] = {
519 "0",
520 "1",
521 "2",
522 "4",
523 NULL,
524 };
525 static const char * const hevc_tier[] = {
526 "Main",
527 "High",
528 NULL,
529 };
530 static const char * const hevc_loop_filter_mode[] = {
531 "Disabled",
532 "Enabled",
533 "Disabled at slice boundary",
534 "NULL",
535 };
c7361ae1 536
0996517c
HV		 537 switch (id) {
538 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
539 return mpeg_audio_sampling_freq;
540 case V4L2_CID_MPEG_AUDIO_ENCODING:
541 return mpeg_audio_encoding;
542 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
543 return mpeg_audio_l1_bitrate;
544 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
545 return mpeg_audio_l2_bitrate;
546 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
547 return mpeg_audio_l3_bitrate;
548 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
549 return mpeg_audio_ac3_bitrate;
550 case V4L2_CID_MPEG_AUDIO_MODE:
551 return mpeg_audio_mode;
552 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
553 return mpeg_audio_mode_extension;
554 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
555 return mpeg_audio_emphasis;
556 case V4L2_CID_MPEG_AUDIO_CRC:
557 return mpeg_audio_crc;
24c19a21
HV		 558 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
559 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
560 return mpeg_audio_dec_playback;
0996517c
HV		 561 case V4L2_CID_MPEG_VIDEO_ENCODING:
562 return mpeg_video_encoding;
563 case V4L2_CID_MPEG_VIDEO_ASPECT:
564 return mpeg_video_aspect;
565 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
566 return mpeg_video_bitrate_mode;
567 case V4L2_CID_MPEG_STREAM_TYPE:
568 return mpeg_stream_type;
569 case V4L2_CID_MPEG_STREAM_VBI_FMT:
570 return mpeg_stream_vbi_fmt;
571 case V4L2_CID_POWER_LINE_FREQUENCY:
572 return camera_power_line_frequency;
573 case V4L2_CID_EXPOSURE_AUTO:
574 return camera_exposure_auto;
cf072139
SN		 575 case V4L2_CID_EXPOSURE_METERING:
576 return camera_exposure_metering;
2272ab65
SN		 577 case V4L2_CID_AUTO_FOCUS_RANGE:
578 return camera_auto_focus_range;
0996517c
HV		 579 case V4L2_CID_COLORFX:
580 return colorfx;
e40a0573
SN		 581 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
582 return auto_n_preset_white_balance;
7f84ad8b
SN		 583 case V4L2_CID_ISO_SENSITIVITY_AUTO:
584 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 585 case V4L2_CID_SCENE_MODE:
586 return scene_mode;
0996517c 587 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 588 return tune_emphasis;
589 case V4L2_CID_TUNE_DEEMPHASIS:
590 return tune_emphasis;
0b159acd
SA		 591 case V4L2_CID_FLASH_LED_MODE:
592 return flash_led_mode;
593 case V4L2_CID_FLASH_STROBE_SOURCE:
594 return flash_strobe_source;
064f5096
KD		 595 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
596 return header_mode;
597 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
598 return multi_slice;
599 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
600 return entropy_mode;
601 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
602 return mpeg_h264_level;
603 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
604 return h264_loop_filter;
605 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
606 return h264_profile;
607 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
608 return vui_sar_idc;
2e81dde9
AK		 609 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
610 return h264_fp_arrangement_type;
611 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
612 return h264_fmo_map_type;
064f5096
KD		 613 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
614 return mpeg_mpeg4_level;
615 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
616 return mpeg4_profile;
bc9028e1
AK		 617 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
618 return vpx_golden_frame_sel;
5520b946
KW		 619 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
620 return vp8_profile;
2a75364d
KW		 621 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
622 return vp9_profile;
c7361ae1
SN		 623 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
624 return jpeg_chroma_subsampling;
977ebec7
HV		 625 case V4L2_CID_DV_TX_MODE:
626 return dv_tx_mode;
627 case V4L2_CID_DV_TX_RGB_RANGE:
628 case V4L2_CID_DV_RX_RGB_RANGE:
629 return dv_rgb_range;
45cc29af
HV		 630 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
631 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
632 return dv_it_content_type;
a77b4fc0
HV		 633 case V4L2_CID_DETECT_MD_MODE:
634 return detect_md_mode;
2c02837b
SM		 635 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
636 return hevc_profile;
637 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
638 return hevc_level;
639 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
640 return hevc_hierarchial_coding_type;
641 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
642 return hevc_refresh_type;
643 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
644 return hevc_size_of_length_field;
645 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
646 return hevc_tier;
647 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
648 return hevc_loop_filter_mode;
c7361ae1 649
0996517c
HV		 650 default:
651 return NULL;
652 }
653}
654EXPORT_SYMBOL(v4l2_ctrl_get_menu);
655
bc9028e1 656#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 657/*
658 * Returns NULL or an s64 type array containing the menu for given
659 * control ID. The total number of the menu items is returned in @len.
660 */
4eed9b33 661const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 662{
4eed9b33 663 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 664 1, 2, 4, 8,
665 };
666
4eed9b33 667 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 668 1, 2, 3,
669 };
670
d1e9b7c1 671 switch (id) {
bc9028e1
AK		 672 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
673 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
674 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
675 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 676 default:
677 *len = 0;
678 return NULL;
2028c71d 679 }
d1e9b7c1
SN		 680}
681EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
682
0996517c
HV		 683/* Return the control name. */
684const char *v4l2_ctrl_get_name(u32 id)
685{
686 switch (id) {
687 /* USER controls */
59253f29 688 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 689 case V4L2_CID_USER_CLASS: return "User Controls";
690 case V4L2_CID_BRIGHTNESS: return "Brightness";
691 case V4L2_CID_CONTRAST: return "Contrast";
692 case V4L2_CID_SATURATION: return "Saturation";
693 case V4L2_CID_HUE: return "Hue";
694 case V4L2_CID_AUDIO_VOLUME: return "Volume";
695 case V4L2_CID_AUDIO_BALANCE: return "Balance";
696 case V4L2_CID_AUDIO_BASS: return "Bass";
697 case V4L2_CID_AUDIO_TREBLE: return "Treble";
698 case V4L2_CID_AUDIO_MUTE: return "Mute";
699 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 700 case V4L2_CID_BLACK_LEVEL: return "Black Level";
701 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
702 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
703 case V4L2_CID_RED_BALANCE: return "Red Balance";
704 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
705 case V4L2_CID_GAMMA: return "Gamma";
706 case V4L2_CID_EXPOSURE: return "Exposure";
707 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
708 case V4L2_CID_GAIN: return "Gain";
709 case V4L2_CID_HFLIP: return "Horizontal Flip";
710 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 711 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
712 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
713 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
714 case V4L2_CID_SHARPNESS: return "Sharpness";
715 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
716 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 717 case V4L2_CID_COLOR_KILLER: return "Color Killer";
718 case V4L2_CID_COLORFX: return "Color Effects";
719 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
720 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
721 case V4L2_CID_ROTATE: return "Rotate";
722 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 723 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 724 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
725 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 726 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
727 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 728 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 729 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 730
bc9028e1
AK		 731 /* Codec controls */
732 /* The MPEG controls are applicable to all codec controls
733 * and the 'MPEG' part of the define is historical */
6c8d6111 734 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 735 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 736 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
737 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
738 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
739 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
740 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 741 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
742 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
743 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 744 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 745 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
746 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
747 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
748 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
749 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 750 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 751 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
752 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
753 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
754 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
755 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 756 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
757 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 758 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
759 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
760 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
761 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
762 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
763 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
764 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
765 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
766 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 767 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 768 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 769 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 770 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
771 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 772 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 773 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
774 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
775 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 776 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 777 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 778 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
779 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 780 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
781 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
782 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 783 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
784 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 785 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
786 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
787 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
788 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 789 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
790 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 791 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
792 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
793 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
794 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
795 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
796 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
797 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
798 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
799 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 800 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
801 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
802 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
803 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
804 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
805 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
806 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
807 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
808 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
809 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
810 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
811 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
812 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
813 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
814 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
815 return "H264 Set QP Value for HC Layers";
50656bad
PZ		 816 case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
817 return "H264 Constrained Intra Pred";
d034696c 818 case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET: return "H264 Chroma QP Index Offset";
87effaae
FL		 819 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP: return "H264 I-Frame Minimum QP Value";
820 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP: return "H264 I-Frame Maximum QP Value";
821 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP: return "H264 P-Frame Minimum QP Value";
822 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP: return "H264 P-Frame Maximum QP Value";
064f5096 823 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 824 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
825 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 826 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
827 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
828 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
829 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
830 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 831 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
832 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
833 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 834 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 835 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
836 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 837 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 838 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
839 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 840 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
cedc1210 841 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
c27bb30e
PK		 842 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
843 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices";
2495f39c
DH		 844 case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS: return "FWHT Stateless Parameters";
845 case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
846 case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value";
0996517c 847
bc9028e1
AK		 848 /* VPX controls */
849 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
850 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
851 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
852 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
853 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
854 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
855 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 856 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
857 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
858 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
859 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
5520b946 860 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
2a75364d 861 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
bc9028e1 862
2c02837b
SM		 863 /* HEVC controls */
864 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value";
865 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP: return "HEVC P-Frame QP Value";
866 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP: return "HEVC B-Frame QP Value";
867 case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP: return "HEVC Minimum QP Value";
868 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP: return "HEVC Maximum QP Value";
869 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: return "HEVC Profile";
870 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: return "HEVC Level";
871 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: return "HEVC Tier";
872 case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION: return "HEVC Frame Rate Resolution";
873 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH: return "HEVC Maximum Coding Unit Depth";
874 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: return "HEVC Refresh Type";
875 case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED: return "HEVC Constant Intra Prediction";
876 case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU: return "HEVC Lossless Encoding";
877 case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT: return "HEVC Wavefront";
878 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: return "HEVC Loop Filter";
879 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP: return "HEVC QP Values";
880 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: return "HEVC Hierarchical Coding Type";
881 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER: return "HEVC Hierarchical Coding Layer";
882 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP: return "HEVC Hierarchical Layer 0 QP";
883 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP: return "HEVC Hierarchical Layer 1 QP";
884 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP: return "HEVC Hierarchical Layer 2 QP";
885 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP: return "HEVC Hierarchical Layer 3 QP";
886 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP: return "HEVC Hierarchical Layer 4 QP";
887 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP: return "HEVC Hierarchical Layer 5 QP";
888 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP: return "HEVC Hierarchical Layer 6 QP";
889 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR: return "HEVC Hierarchical Lay 0 BitRate";
890 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR: return "HEVC Hierarchical Lay 1 BitRate";
891 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR: return "HEVC Hierarchical Lay 2 BitRate";
892 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR: return "HEVC Hierarchical Lay 3 BitRate";
893 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR: return "HEVC Hierarchical Lay 4 BitRate";
894 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR: return "HEVC Hierarchical Lay 5 BitRate";
895 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR: return "HEVC Hierarchical Lay 6 BitRate";
896 case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB: return "HEVC General PB";
897 case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID: return "HEVC Temporal ID";
898 case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING: return "HEVC Strong Intra Smoothing";
899 case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT: return "HEVC Intra PU Split";
900 case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION: return "HEVC TMV Prediction";
901 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1: return "HEVC Max Num of Candidate MVs";
902 case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE: return "HEVC ENC Without Startcode";
903 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD: return "HEVC Num of I-Frame b/w 2 IDR";
904 case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2: return "HEVC Loop Filter Beta Offset";
905 case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2: return "HEVC Loop Filter TC Offset";
906 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: return "HEVC Size of Length Field";
907 case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES: return "Reference Frames for a P-Frame";
908 case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR: return "Prepend SPS and PPS to IDR";
909
0996517c 910 /* CAMERA controls */
59253f29 911 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 912 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
913 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
914 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
915 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
916 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
917 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
918 case V4L2_CID_PAN_RESET: return "Pan, Reset";
919 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
920 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
921 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
922 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
923 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 924 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 925 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
926 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
927 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
928 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 929 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
930 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 931 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 932 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 933 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 934 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 935 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
936 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 937 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 938 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 939 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 940 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
941 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
942 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
943 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 944 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
945 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 946
59253f29
HV		 947 /* FM Radio Modulator controls */
948 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 949 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
950 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
951 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
952 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
953 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
954 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 955 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
956 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
957 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
958 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
959 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
960 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
961 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
962 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
963 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 964 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
965 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
966 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 967 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 968 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
969 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
970 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
971 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
972 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
973 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
974 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 975 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 976 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
977 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
978
0b159acd 979 /* Flash controls */
59253f29 980 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 981 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
982 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
983 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 984 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 985 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
986 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
987 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
988 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
989 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
990 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 991 case V4L2_CID_FLASH_FAULT: return "Faults";
992 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 993 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 994
c7361ae1 995 /* JPEG encoder controls */
59253f29 996 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 997 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
998 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
999 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
1000 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
1001 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
1002
8c9d236e 1003 /* Image source controls */
59253f29 1004 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 1005 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
1006 case V4L2_CID_VBLANK: return "Vertical Blanking";
1007 case V4L2_CID_HBLANK: return "Horizontal Blanking";
1008 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 1009 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
1010 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
1011 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
1012 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 1013
c643ee13 1014 /* Image processing controls */
59253f29 1015 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 1016 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
1017 case V4L2_CID_LINK_FREQ: return "Link Frequency";
1018 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 1019 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
446e4125 1020 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
e72cb0e7 1021 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
c643ee13 1022
977ebec7 1023 /* DV controls */
59253f29 1024 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 1025 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
1026 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
1027 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
1028 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
1029 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
1030 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
45cc29af 1031 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
977ebec7
HV		 1032 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
1033 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
45cc29af 1034 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
977ebec7 1035
aec330a8
AS		 1036 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
1037 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
1038 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad 1039 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
41018cb8 1040 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
80807fad
AP		 1041 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
1042 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
1043 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
1044 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
1045 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
1046 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 1047 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
1048 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 1049 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 1050 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
1051 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
1052 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
1053 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1054 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1055 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 1056
1057 /* Detection controls */
1058 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1059 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
1060 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
1061 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
1062 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
1063 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 1064 default:
1065 return NULL;
1066 }
1067}
1068EXPORT_SYMBOL(v4l2_ctrl_get_name);
1069
1070void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 1071 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 1072{
1073 *name = v4l2_ctrl_get_name(id);
1074 *flags = 0;
1075
1076 switch (id) {
1077 case V4L2_CID_AUDIO_MUTE:
1078 case V4L2_CID_AUDIO_LOUDNESS:
1079 case V4L2_CID_AUTO_WHITE_BALANCE:
1080 case V4L2_CID_AUTOGAIN:
1081 case V4L2_CID_HFLIP:
1082 case V4L2_CID_VFLIP:
1083 case V4L2_CID_HUE_AUTO:
1084 case V4L2_CID_CHROMA_AGC:
1085 case V4L2_CID_COLOR_KILLER:
a2f8b84f 1086 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 1087 case V4L2_CID_MPEG_AUDIO_MUTE:
1088 case V4L2_CID_MPEG_VIDEO_MUTE:
1089 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
1090 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
1091 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
1092 case V4L2_CID_FOCUS_AUTO:
1093 case V4L2_CID_PRIVACY:
1094 case V4L2_CID_AUDIO_LIMITER_ENABLED:
1095 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
1096 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 1097 case V4L2_CID_ILLUMINATORS_1:
1098 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 1099 case V4L2_CID_FLASH_STROBE_STATUS:
1100 case V4L2_CID_FLASH_CHARGE:
1101 case V4L2_CID_FLASH_READY:
064f5096
KD		 1102 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
1103 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
1104 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
1105 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
1106 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
1107 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
1108 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 1109 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 1110 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 1111 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 1112 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 1113 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
1114 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
1115 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 1116 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 1117 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 1118 case V4L2_CID_RDS_TX_MONO_STEREO:
1119 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
1120 case V4L2_CID_RDS_TX_COMPRESSED:
1121 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
1122 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
1123 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
1124 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
1125 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 1126 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1127 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1128 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 1129 *type = V4L2_CTRL_TYPE_BOOLEAN;
1130 *min = 0;
1131 *max = *step = 1;
1132 break;
c0e681f5
HV		 1133 case V4L2_CID_ROTATE:
1134 *type = V4L2_CTRL_TYPE_INTEGER;
1135 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1136 break;
bf0bedd3
AG		 1137 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
1138 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1139 *type = V4L2_CTRL_TYPE_INTEGER;
1140 break;
cedc1210 1141 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
0996517c
HV		 1142 case V4L2_CID_PAN_RESET:
1143 case V4L2_CID_TILT_RESET:
0b159acd
SA		 1144 case V4L2_CID_FLASH_STROBE:
1145 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 1146 case V4L2_CID_AUTO_FOCUS_START:
1147 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 1148 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RR		 1149 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1150 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1151 *min = *max = *step = *def = 0;
1152 break;
1153 case V4L2_CID_POWER_LINE_FREQUENCY:
1154 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1155 case V4L2_CID_MPEG_AUDIO_ENCODING:
1156 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1157 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1158 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1159 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1160 case V4L2_CID_MPEG_AUDIO_MODE:
1161 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1162 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1163 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1164 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1165 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1166 case V4L2_CID_MPEG_VIDEO_ENCODING:
1167 case V4L2_CID_MPEG_VIDEO_ASPECT:
1168 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1169 case V4L2_CID_MPEG_STREAM_TYPE:
1170 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1171 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1172 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1173 case V4L2_CID_COLORFX:
e40a0573 1174 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1175 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1176 case V4L2_CID_FLASH_LED_MODE:
1177 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1178 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1179 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1180 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1181 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1182 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1183 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1184 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1185 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1186 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1187 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1188 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1189 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1190 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1191 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1192 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1193 case V4L2_CID_DV_TX_MODE:
1194 case V4L2_CID_DV_TX_RGB_RANGE:
45cc29af 1195 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
977ebec7 1196 case V4L2_CID_DV_RX_RGB_RANGE:
45cc29af 1197 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
5ebef0fb 1198 case V4L2_CID_TEST_PATTERN:
446e4125 1199 case V4L2_CID_DEINTERLACING_MODE:
aec330a8 1200 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1201 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
5520b946 1202 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
2a75364d 1203 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
a77b4fc0 1204 case V4L2_CID_DETECT_MD_MODE:
2c02837b
SM		 1205 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
1206 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
1207 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
1208 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
1209 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
1210 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
1211 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
0996517c
HV		 1212 *type = V4L2_CTRL_TYPE_MENU;
1213 break;
c643ee13
SA		 1214 case V4L2_CID_LINK_FREQ:
1215 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1216 break;
0996517c
HV		 1217 case V4L2_CID_RDS_TX_PS_NAME:
1218 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1219 case V4L2_CID_RDS_RX_PS_NAME:
1220 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1221 *type = V4L2_CTRL_TYPE_STRING;
1222 break;
7f84ad8b 1223 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1224 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1225 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1226 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1227 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1228 break;
0996517c
HV		 1229 case V4L2_CID_USER_CLASS:
1230 case V4L2_CID_CAMERA_CLASS:
1231 case V4L2_CID_MPEG_CLASS:
1232 case V4L2_CID_FM_TX_CLASS:
0b159acd 1233 case V4L2_CID_FLASH_CLASS:
c7361ae1 1234 case V4L2_CID_JPEG_CLASS:
8c9d236e 1235 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1236 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1237 case V4L2_CID_DV_CLASS:
aec330a8 1238 case V4L2_CID_FM_RX_CLASS:
80807fad 1239 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1240 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1241 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1242 /* You can neither read not write these */
1243 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1244 *min = *max = *step = *def = 0;
1245 break;
1246 case V4L2_CID_BG_COLOR:
1247 *type = V4L2_CTRL_TYPE_INTEGER;
1248 *step = 1;
1249 *min = 0;
1250 /* Max is calculated as RGB888 that is 2^24 */
1251 *max = 0xFFFFFF;
1252 break;
0b159acd 1253 case V4L2_CID_FLASH_FAULT:
c7361ae1 1254 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1255 case V4L2_CID_3A_LOCK:
2272ab65 1256 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1257 case V4L2_CID_DV_TX_HOTPLUG:
1258 case V4L2_CID_DV_TX_RXSENSE:
1259 case V4L2_CID_DV_TX_EDID_PRESENT:
1260 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1261 *type = V4L2_CTRL_TYPE_BITMASK;
1262 break;
064f5096
KD		 1263 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1264 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1265 *type = V4L2_CTRL_TYPE_INTEGER;
1266 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1267 break;
24c19a21 1268 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1269 *type = V4L2_CTRL_TYPE_INTEGER64;
1270 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1271 *min = *def = 0;
1272 *max = 0x1ffffffffLL;
1273 *step = 1;
1274 break;
1275 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1276 *type = V4L2_CTRL_TYPE_INTEGER64;
1277 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1278 *min = *def = 0;
1279 *max = 0x7fffffffffffffffLL;
1280 *step = 1;
1281 break;
c643ee13 1282 case V4L2_CID_PIXEL_RATE:
24c19a21 1283 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1284 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1285 break;
a77b4fc0
HV		 1286 case V4L2_CID_DETECT_MD_REGION_GRID:
1287 *type = V4L2_CTRL_TYPE_U8;
1288 break;
1289 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1290 *type = V4L2_CTRL_TYPE_U16;
1291 break;
811c5081
HV		 1292 case V4L2_CID_RDS_TX_ALT_FREQS:
1293 *type = V4L2_CTRL_TYPE_U32;
1294 break;
c27bb30e
PK		 1295 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
1296 *type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
1297 break;
1298 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
1299 *type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
1300 break;
2495f39c
DH		 1301 case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
1302 *type = V4L2_CTRL_TYPE_FWHT_PARAMS;
1303 break;
0996517c
HV		 1304 default:
1305 *type = V4L2_CTRL_TYPE_INTEGER;
1306 break;
1307 }
1308 switch (id) {
1309 case V4L2_CID_MPEG_AUDIO_ENCODING:
1310 case V4L2_CID_MPEG_AUDIO_MODE:
1311 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1312 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1313 case V4L2_CID_MPEG_STREAM_TYPE:
1314 *flags |= V4L2_CTRL_FLAG_UPDATE;
1315 break;
1316 case V4L2_CID_AUDIO_VOLUME:
1317 case V4L2_CID_AUDIO_BALANCE:
1318 case V4L2_CID_AUDIO_BASS:
1319 case V4L2_CID_AUDIO_TREBLE:
1320 case V4L2_CID_BRIGHTNESS:
1321 case V4L2_CID_CONTRAST:
1322 case V4L2_CID_SATURATION:
1323 case V4L2_CID_HUE:
1324 case V4L2_CID_RED_BALANCE:
1325 case V4L2_CID_BLUE_BALANCE:
1326 case V4L2_CID_GAMMA:
1327 case V4L2_CID_SHARPNESS:
1328 case V4L2_CID_CHROMA_GAIN:
1329 case V4L2_CID_RDS_TX_DEVIATION:
1330 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1331 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1332 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1333 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1334 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1335 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1336 case V4L2_CID_PILOT_TONE_DEVIATION:
1337 case V4L2_CID_PILOT_TONE_FREQUENCY:
1338 case V4L2_CID_TUNE_POWER_LEVEL:
1339 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
41018cb8 1340 case V4L2_CID_RF_TUNER_RF_GAIN:
80807fad
AP		 1341 case V4L2_CID_RF_TUNER_LNA_GAIN:
1342 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1343 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1344 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1345 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1346 *flags |= V4L2_CTRL_FLAG_SLIDER;
1347 break;
1348 case V4L2_CID_PAN_RELATIVE:
1349 case V4L2_CID_TILT_RELATIVE:
1350 case V4L2_CID_FOCUS_RELATIVE:
1351 case V4L2_CID_IRIS_RELATIVE:
1352 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RR		 1353 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1354 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1355 break;
0b159acd 1356 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1357 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1358 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1359 case V4L2_CID_DV_TX_HOTPLUG:
1360 case V4L2_CID_DV_TX_RXSENSE:
1361 case V4L2_CID_DV_TX_EDID_PRESENT:
1362 case V4L2_CID_DV_RX_POWER_PRESENT:
45cc29af 1363 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
9570a148
HV		 1364 case V4L2_CID_RDS_RX_PTY:
1365 case V4L2_CID_RDS_RX_PS_NAME:
1366 case V4L2_CID_RDS_RX_RADIO_TEXT:
1367 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1368 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1369 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1370 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1371 break;
9aa4357e
AP		 1372 case V4L2_CID_RF_TUNER_PLL_LOCK:
1373 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1374 break;
0996517c
HV		 1375 }
1376}
1377EXPORT_SYMBOL(v4l2_ctrl_fill);
1378
9cac9d2f
RR		 1379static u32 user_flags(const struct v4l2_ctrl *ctrl)
1380{
1381 u32 flags = ctrl->flags;
1382
1383 if (ctrl->is_ptr)
1384 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
1385
1386 return flags;
1387}
1388
6e239399
HV		 1389static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1390{
f45f3f75 1391 memset(ev, 0, sizeof(*ev));
6e239399
HV		 1392 ev->type = V4L2_EVENT_CTRL;
1393 ev->id = ctrl->id;
1394 ev->u.ctrl.changes = changes;
1395 ev->u.ctrl.type = ctrl->type;
9cac9d2f 1396 ev->u.ctrl.flags = user_flags(ctrl);
d9a25471 1397 if (ctrl->is_ptr)
6e239399
HV		 1398 ev->u.ctrl.value64 = 0;
1399 else
2a9ec373 1400 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1401 ev->u.ctrl.minimum = ctrl->minimum;
1402 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1403 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1404 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1405 ev->u.ctrl.step = 1;
1406 else
1407 ev->u.ctrl.step = ctrl->step;
1408 ev->u.ctrl.default_value = ctrl->default_value;
1409}
1410
1411static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1412{
1413 struct v4l2_event ev;
77068d36 1414 struct v4l2_subscribed_event *sev;
6e239399 1415
77068d36 1416 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1417 return;
6e239399
HV		 1418 fill_event(&ev, ctrl, changes);
1419
77068d36 1420 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1421 if (sev->fh != fh ||
1422 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1423 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1424}
1425
998e7659 1426static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1427 union v4l2_ctrl_ptr ptr1,
1428 union v4l2_ctrl_ptr ptr2)
1429{
1430 switch (ctrl->type) {
1431 case V4L2_CTRL_TYPE_BUTTON:
1432 return false;
1433 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1434 idx *= ctrl->elem_size;
0176077a 1435 /* strings are always 0-terminated */
265c7f8a 1436 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1437 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1438 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1439 case V4L2_CTRL_TYPE_U8:
1440 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1441 case V4L2_CTRL_TYPE_U16:
1442 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1443 case V4L2_CTRL_TYPE_U32:
1444 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1445 default:
265c7f8a
HV		 1446 if (ctrl->is_int)
1447 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1448 idx *= ctrl->elem_size;
1449 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1450 }
1451}
1452
998e7659 1453static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1454 union v4l2_ctrl_ptr ptr)
1455{
1456 switch (ctrl->type) {
1457 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1458 idx *= ctrl->elem_size;
1459 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1460 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1461 break;
1462 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1463 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1464 break;
1465 case V4L2_CTRL_TYPE_INTEGER:
1466 case V4L2_CTRL_TYPE_INTEGER_MENU:
1467 case V4L2_CTRL_TYPE_MENU:
1468 case V4L2_CTRL_TYPE_BITMASK:
1469 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1470 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1471 break;
dda4a4d5
HV		 1472 case V4L2_CTRL_TYPE_U8:
1473 ptr.p_u8[idx] = ctrl->default_value;
1474 break;
1475 case V4L2_CTRL_TYPE_U16:
1476 ptr.p_u16[idx] = ctrl->default_value;
1477 break;
811c5081
HV		 1478 case V4L2_CTRL_TYPE_U32:
1479 ptr.p_u32[idx] = ctrl->default_value;
1480 break;
0176077a 1481 default:
302ab7ce
HV		 1482 idx *= ctrl->elem_size;
1483 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1484 break;
1485 }
1486}
1487
1488static void std_log(const struct v4l2_ctrl *ctrl)
1489{
1490 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1491
998e7659
HV		 1492 if (ctrl->is_array) {
1493 unsigned i;
1494
1495 for (i = 0; i < ctrl->nr_of_dims; i++)
1496 pr_cont("[%u]", ctrl->dims[i]);
1497 pr_cont(" ");
1498 }
1499
0176077a
HV		 1500 switch (ctrl->type) {
1501 case V4L2_CTRL_TYPE_INTEGER:
1502 pr_cont("%d", *ptr.p_s32);
1503 break;
1504 case V4L2_CTRL_TYPE_BOOLEAN:
1505 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1506 break;
1507 case V4L2_CTRL_TYPE_MENU:
1508 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1509 break;
1510 case V4L2_CTRL_TYPE_INTEGER_MENU:
1511 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1512 break;
1513 case V4L2_CTRL_TYPE_BITMASK:
1514 pr_cont("0x%08x", *ptr.p_s32);
1515 break;
1516 case V4L2_CTRL_TYPE_INTEGER64:
1517 pr_cont("%lld", *ptr.p_s64);
1518 break;
1519 case V4L2_CTRL_TYPE_STRING:
1520 pr_cont("%s", ptr.p_char);
1521 break;
dda4a4d5
HV		 1522 case V4L2_CTRL_TYPE_U8:
1523 pr_cont("%u", (unsigned)*ptr.p_u8);
1524 break;
1525 case V4L2_CTRL_TYPE_U16:
1526 pr_cont("%u", (unsigned)*ptr.p_u16);
1527 break;
811c5081
HV		 1528 case V4L2_CTRL_TYPE_U32:
1529 pr_cont("%u", (unsigned)*ptr.p_u32);
1530 break;
0176077a
HV		 1531 default:
1532 pr_cont("unknown type %d", ctrl->type);
1533 break;
1534 }
1535}
1536
958c7c7e
HV		 1537/*
1538 * Round towards the closest legal value. Be careful when we are
1539 * close to the maximum range of the control type to prevent
1540 * wrap-arounds.
1541 */
0176077a
HV		 1542#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1543({ \
1544 offset_type offset; \
958c7c7e 1545 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1546 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1547 val = (ctrl)->maximum; \
1548 else \
9c9cb1fa 1549 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1550 val = clamp_t(typeof(val), val, \
1551 (ctrl)->minimum, (ctrl)->maximum); \
1552 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1553 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1554 val = (ctrl)->minimum + offset; \
1555 0; \
1556})
1557
1558/* Validate a new control */
998e7659 1559static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1560 union v4l2_ctrl_ptr ptr)
1561{
c27bb30e 1562 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
0176077a 1563 size_t len;
0d5e8c43
HV		 1564 u64 offset;
1565 s64 val;
0176077a 1566
95140634 1567 switch ((u32)ctrl->type) {
0176077a 1568 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1569 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1570 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1571 /*
1572 * We can't use the ROUND_TO_RANGE define here due to
1573 * the u64 divide that needs special care.
1574 */
1575 val = ptr.p_s64[idx];
9c9cb1fa 1576 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1577 val = ctrl->maximum;
1578 else
9c9cb1fa 1579 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1580 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1581 offset = val - ctrl->minimum;
1582 do_div(offset, ctrl->step);
1583 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1584 return 0;
dda4a4d5
HV		 1585 case V4L2_CTRL_TYPE_U8:
1586 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1587 case V4L2_CTRL_TYPE_U16:
1588 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1589 case V4L2_CTRL_TYPE_U32:
1590 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1591
1592 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1593 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1594 return 0;
1595
1596 case V4L2_CTRL_TYPE_MENU:
1597 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1598 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1599 return -ERANGE;
d7a955c8 1600 if (ctrl->menu_skip_mask & (1ULL << ptr.p_s32[idx]))
0176077a
HV		 1601 return -EINVAL;
1602 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1603 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1604 return -EINVAL;
1605 return 0;
1606
1607 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1608 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1609 return 0;
1610
1611 case V4L2_CTRL_TYPE_BUTTON:
1612 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1613 ptr.p_s32[idx] = 0;
0176077a
HV		 1614 return 0;
1615
1616 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1617 idx *= ctrl->elem_size;
1618 len = strlen(ptr.p_char + idx);
0176077a
HV		 1619 if (len < ctrl->minimum)
1620 return -ERANGE;
0d5e8c43 1621 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1622 return -ERANGE;
1623 return 0;
1624
c27bb30e
PK		 1625 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1626 p_mpeg2_slice_params = ptr.p;
1627
1628 switch (p_mpeg2_slice_params->sequence.chroma_format) {
1629 case 1: /* 4:2:0 */
1630 case 2: /* 4:2:2 */
1631 case 3: /* 4:4:4 */
1632 break;
1633 default:
1634 return -EINVAL;
1635 }
1636
1637 switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
1638 case 0: /* 8 bits */
1639 case 1: /* 9 bits */
b04240a6
JK		 1640 case 2: /* 10 bits */
1641 case 3: /* 11 bits */
c27bb30e
PK		 1642 break;
1643 default:
1644 return -EINVAL;
1645 }
1646
1647 switch (p_mpeg2_slice_params->picture.picture_structure) {
1648 case 1: /* interlaced top field */
1649 case 2: /* interlaced bottom field */
1650 case 3: /* progressive */
1651 break;
1652 default:
1653 return -EINVAL;
1654 }
1655
1656 switch (p_mpeg2_slice_params->picture.picture_coding_type) {
1657 case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
1658 case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
1659 case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
1660 break;
1661 default:
1662 return -EINVAL;
1663 }
1664
c27bb30e
PK		 1665 return 0;
1666
1667 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
1668 return 0;
1669
2495f39c
DH		 1670 case V4L2_CTRL_TYPE_FWHT_PARAMS:
1671 return 0;
1672
0176077a
HV		 1673 default:
1674 return -EINVAL;
1675 }
1676}
1677
1678static const struct v4l2_ctrl_type_ops std_type_ops = {
1679 .equal = std_equal,
1680 .init = std_init,
1681 .log = std_log,
1682 .validate = std_validate,
1683};
1684
000e4f9a
HV		 1685/* Helper function: copy the given control value back to the caller */
1686static int ptr_to_user(struct v4l2_ext_control *c,
1687 struct v4l2_ctrl *ctrl,
1688 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1689{
1690 u32 len;
1691
d9a25471 1692 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1693 return copy_to_user(c->ptr, ptr.p, c->size) ?
1694 -EFAULT : 0;
d9a25471 1695
0996517c
HV		 1696 switch (ctrl->type) {
1697 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1698 len = strlen(ptr.p_char);
0996517c 1699 if (c->size < len + 1) {
c336f75e 1700 c->size = ctrl->elem_size;
0996517c
HV		 1701 return -ENOSPC;
1702 }
000e4f9a 1703 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1704 -EFAULT : 0;
0996517c 1705 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1706 c->value64 = *ptr.p_s64;
0996517c
HV		 1707 break;
1708 default:
000e4f9a 1709 c->value = *ptr.p_s32;
0996517c
HV		 1710 break;
1711 }
1712 return 0;
1713}
1714
000e4f9a
HV		 1715/* Helper function: copy the current control value back to the caller */
1716static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1717 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1718{
1719 return ptr_to_user(c, ctrl, ctrl->p_cur);
1720}
1721
1722/* Helper function: copy the new control value back to the caller */
1723static int new_to_user(struct v4l2_ext_control *c,
1724 struct v4l2_ctrl *ctrl)
1725{
1726 return ptr_to_user(c, ctrl, ctrl->p_new);
1727}
1728
6fa6f831
HV		 1729/* Helper function: copy the request value back to the caller */
1730static int req_to_user(struct v4l2_ext_control *c,
1731 struct v4l2_ctrl_ref *ref)
1732{
1733 return ptr_to_user(c, ref->ctrl, ref->p_req);
1734}
1735
953eae5d
RR		 1736/* Helper function: copy the initial control value back to the caller */
1737static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1738{
1739 int idx;
1740
1741 for (idx = 0; idx < ctrl->elems; idx++)
1742 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1743
1744 return ptr_to_user(c, ctrl, ctrl->p_new);
1745}
1746
000e4f9a
HV		 1747/* Helper function: copy the caller-provider value to the given control value */
1748static int user_to_ptr(struct v4l2_ext_control *c,
1749 struct v4l2_ctrl *ctrl,
1750 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1751{
1752 int ret;
1753 u32 size;
1754
2a863793 1755 ctrl->is_new = 1;
302ab7ce
HV		 1756 if (ctrl->is_ptr && !ctrl->is_string) {
1757 unsigned idx;
1758
40265bbe 1759 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1760 if (ret || !ctrl->is_array)
1761 return ret;
1762 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1763 ctrl->type_ops->init(ctrl, idx, ptr);
1764 return 0;
1765 }
d9a25471 1766
0996517c
HV		 1767 switch (ctrl->type) {
1768 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1769 *ptr.p_s64 = c->value64;
0996517c
HV		 1770 break;
1771 case V4L2_CTRL_TYPE_STRING:
1772 size = c->size;
1773 if (size == 0)
1774 return -ERANGE;
1775 if (size > ctrl->maximum + 1)
1776 size = ctrl->maximum + 1;
40265bbe 1777 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1778 if (!ret) {
000e4f9a 1779 char last = ptr.p_char[size - 1];
0996517c 1780
000e4f9a 1781 ptr.p_char[size - 1] = 0;
0996517c
HV		 1782 /* If the string was longer than ctrl->maximum,
1783 then return an error. */
000e4f9a 1784 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1785 return -ERANGE;
1786 }
40265bbe 1787 return ret;
0996517c 1788 default:
000e4f9a 1789 *ptr.p_s32 = c->value;
0996517c
HV		 1790 break;
1791 }
1792 return 0;
1793}
1794
000e4f9a
HV		 1795/* Helper function: copy the caller-provider value as the new control value */
1796static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1797 struct v4l2_ctrl *ctrl)
1798{
000e4f9a
HV		 1799 return user_to_ptr(c, ctrl, ctrl->p_new);
1800}
d9a25471 1801
000e4f9a
HV		 1802/* Copy the one value to another. */
1803static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1804 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1805{
1806 if (ctrl == NULL)
1807 return;
302ab7ce 1808 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1809}
1810
1811/* Copy the new value to the current value. */
2ccbe779 1812static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1813{
000e4f9a 1814 bool changed;
6e239399 1815
0996517c
HV		 1816 if (ctrl == NULL)
1817 return;
9ea1b7a4
HV		 1818
1819 /* has_changed is set by cluster_changed */
1820 changed = ctrl->has_changed;
1821 if (changed)
1822 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1823
2ccbe779
SN		 1824 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1825 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1826 ctrl->flags &=
1827 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1828 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1829 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1830 if (ctrl->cluster[0]->has_volatiles)
1831 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1832 }
1249a3a8 1833 fh = NULL;
72d877ca 1834 }
2ccbe779 1835 if (changed || ch_flags) {
639884a6
HV		 1836 /* If a control was changed that was not one of the controls
1837 modified by the application, then send the event to all. */
1838 if (!ctrl->is_new)
1839 fh = NULL;
6e239399 1840 send_event(fh, ctrl,
2ccbe779 1841 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1842 if (ctrl->call_notify && changed && ctrl->handler->notify)
1843 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1844 }
0996517c
HV		 1845}
1846
1847/* Copy the current value to the new value */
1848static void cur_to_new(struct v4l2_ctrl *ctrl)
1849{
1850 if (ctrl == NULL)
1851 return;
000e4f9a 1852 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1853}
1854
6fa6f831
HV		 1855/* Copy the new value to the request value */
1856static void new_to_req(struct v4l2_ctrl_ref *ref)
1857{
1858 if (!ref)
1859 return;
1860 ptr_to_ptr(ref->ctrl, ref->ctrl->p_new, ref->p_req);
1861 ref->req = ref;
1862}
1863
1864/* Copy the request value to the new value */
1865static void req_to_new(struct v4l2_ctrl_ref *ref)
1866{
1867 if (!ref)
1868 return;
1869 if (ref->req)
1870 ptr_to_ptr(ref->ctrl, ref->req->p_req, ref->ctrl->p_new);
1871 else
1872 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->ctrl->p_new);
1873}
1874
0996517c
HV		 1875/* Return non-zero if one or more of the controls in the cluster has a new
1876 value that differs from the current value. */
1877static int cluster_changed(struct v4l2_ctrl *master)
1878{
9ea1b7a4 1879 bool changed = false;
302ab7ce 1880 unsigned idx;
0996517c
HV		 1881 int i;
1882
9ea1b7a4 1883 for (i = 0; i < master->ncontrols; i++) {
0996517c 1884 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1885 bool ctrl_changed = false;
0996517c
HV		 1886
1887 if (ctrl == NULL)
1888 continue;
45f014c5
RR		 1889
1890 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1891 changed = ctrl_changed = true;
1892
b08d8d26
RR		 1893 /*
1894 * Set has_changed to false to avoid generating
1895 * the event V4L2_EVENT_CTRL_CH_VALUE
1896 */
1897 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1898 ctrl->has_changed = false;
1899 continue;
1900 }
1901
302ab7ce
HV		 1902 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1903 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1904 ctrl->p_cur, ctrl->p_new);
302ab7ce 1905 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1906 changed |= ctrl->has_changed;
0996517c 1907 }
9ea1b7a4 1908 return changed;
0996517c
HV		 1909}
1910
2ccbe779
SN		 1911/* Control range checking */
1912static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1913 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1914{
1915 switch (type) {
1916 case V4L2_CTRL_TYPE_BOOLEAN:
1917 if (step != 1 || max > 1 || min < 0)
1918 return -ERANGE;
1919 /* fall through */
dda4a4d5
HV		 1920 case V4L2_CTRL_TYPE_U8:
1921 case V4L2_CTRL_TYPE_U16:
811c5081 1922 case V4L2_CTRL_TYPE_U32:
2ccbe779 1923 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1924 case V4L2_CTRL_TYPE_INTEGER64:
1925 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1926 return -ERANGE;
1927 return 0;
1928 case V4L2_CTRL_TYPE_BITMASK:
1929 if (step || min || !max || (def & ~max))
1930 return -ERANGE;
1931 return 0;
1932 case V4L2_CTRL_TYPE_MENU:
1933 case V4L2_CTRL_TYPE_INTEGER_MENU:
1934 if (min > max || def < min || def > max)
1935 return -ERANGE;
1936 /* Note: step == menu_skip_mask for menu controls.
1937 So here we check if the default value is masked out. */
1938 if (step && ((1 << def) & step))
1939 return -EINVAL;
1940 return 0;
1941 case V4L2_CTRL_TYPE_STRING:
1942 if (min > max || min < 0 || step < 1 || def)
1943 return -ERANGE;
1944 return 0;
1945 default:
1946 return 0;
1947 }
1948}
1949
03d5285b 1950/* Validate a new control */
7a7f1ab3 1951static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1952{
302ab7ce
HV		 1953 unsigned idx;
1954 int err = 0;
1955
7a7f1ab3
HV		 1956 for (idx = 0; !err && idx < ctrl->elems; idx++)
1957 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1958 return err;
0996517c
HV		 1959}
1960
1961static inline u32 node2id(struct list_head *node)
1962{
1963 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1964}
1965
1966/* Set the handler's error code if it wasn't set earlier already */
1967static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1968{
1969 if (hdl->error == 0)
1970 hdl->error = err;
1971 return err;
1972}
1973
1974/* Initialize the handler */
6cd247ef
AW		 1975int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1976 unsigned nr_of_controls_hint,
1977 struct lock_class_key *key, const char *name)
0996517c 1978{
48e3e36a 1979 mutex_init(&hdl->_lock);
77e7c4e6 1980 hdl->lock = &hdl->_lock;
6cd247ef 1981 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1982 INIT_LIST_HEAD(&hdl->ctrls);
1983 INIT_LIST_HEAD(&hdl->ctrl_refs);
6fa6f831
HV		 1984 INIT_LIST_HEAD(&hdl->requests);
1985 INIT_LIST_HEAD(&hdl->requests_queued);
1986 hdl->request_is_queued = false;
0996517c 1987 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
758d90e1
TF		 1988 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
1989 sizeof(hdl->buckets[0]),
1990 GFP_KERNEL | __GFP_ZERO);
0996517c 1991 hdl->error = hdl->buckets ? 0 : -ENOMEM;
52beeddb 1992 media_request_object_init(&hdl->req_obj);
0996517c
HV		 1993 return hdl->error;
1994}
6cd247ef 1995EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1996
1997/* Free all controls and control refs */
1998void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1999{
2000 struct v4l2_ctrl_ref *ref, *next_ref;
2001 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 2002 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 2003
2004 if (hdl == NULL || hdl->buckets == NULL)
2005 return;
2006
6fa6f831
HV		 2007 if (!hdl->req_obj.req && !list_empty(&hdl->requests)) {
2008 struct v4l2_ctrl_handler *req, *next_req;
2009
2010 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) {
2011 media_request_object_unbind(&req->req_obj);
2012 media_request_object_put(&req->req_obj);
2013 }
2014 }
77e7c4e6 2015 mutex_lock(hdl->lock);
0996517c
HV		 2016 /* Free all nodes */
2017 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
2018 list_del(&ref->node);
2019 kfree(ref);
2020 }
2021 /* Free all controls owned by the handler */
2022 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
2023 list_del(&ctrl->node);
77068d36
HV		 2024 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
2025 list_del(&sev->node);
758d90e1 2026 kvfree(ctrl);
0996517c 2027 }
758d90e1 2028 kvfree(hdl->buckets);
0996517c
HV		 2029 hdl->buckets = NULL;
2030 hdl->cached = NULL;
2031 hdl->error = 0;
77e7c4e6 2032 mutex_unlock(hdl->lock);
48e3e36a 2033 mutex_destroy(&hdl->_lock);
0996517c
HV		 2034}
2035EXPORT_SYMBOL(v4l2_ctrl_handler_free);
2036
2037/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
2038 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
2039 with applications that do not use the NEXT_CTRL flag.
2040
2041 We just find the n-th private user control. It's O(N), but that should not
2042 be an issue in this particular case. */
2043static struct v4l2_ctrl_ref *find_private_ref(
2044 struct v4l2_ctrl_handler *hdl, u32 id)
2045{
2046 struct v4l2_ctrl_ref *ref;
2047
2048 id -= V4L2_CID_PRIVATE_BASE;
2049 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2050 /* Search for private user controls that are compatible with
2051 VIDIOC_G/S_CTRL. */
0f8017be 2052 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 2053 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 2054 if (!ref->ctrl->is_int)
0996517c
HV		 2055 continue;
2056 if (id == 0)
2057 return ref;
2058 id--;
2059 }
2060 }
2061 return NULL;
2062}
2063
2064/* Find a control with the given ID. */
2065static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
2066{
2067 struct v4l2_ctrl_ref *ref;
2068 int bucket;
2069
2070 id &= V4L2_CTRL_ID_MASK;
2071
2072 /* Old-style private controls need special handling */
2073 if (id >= V4L2_CID_PRIVATE_BASE)
2074 return find_private_ref(hdl, id);
2075 bucket = id % hdl->nr_of_buckets;
2076
2077 /* Simple optimization: cache the last control found */
2078 if (hdl->cached && hdl->cached->ctrl->id == id)
2079 return hdl->cached;
2080
2081 /* Not in cache, search the hash */
2082 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
2083 while (ref && ref->ctrl->id != id)
2084 ref = ref->next;
2085
2086 if (ref)
2087 hdl->cached = ref; /* cache it! */
2088 return ref;
2089}
2090
2091/* Find a control with the given ID. Take the handler's lock first. */
2092static struct v4l2_ctrl_ref *find_ref_lock(
2093 struct v4l2_ctrl_handler *hdl, u32 id)
2094{
2095 struct v4l2_ctrl_ref *ref = NULL;
2096
2097 if (hdl) {
77e7c4e6 2098 mutex_lock(hdl->lock);
0996517c 2099 ref = find_ref(hdl, id);
77e7c4e6 2100 mutex_unlock(hdl->lock);
0996517c
HV		 2101 }
2102 return ref;
2103}
2104
2105/* Find a control with the given ID. */
2106struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
2107{
2108 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
2109
2110 return ref ? ref->ctrl : NULL;
2111}
2112EXPORT_SYMBOL(v4l2_ctrl_find);
2113
2114/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
2115static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
da1b1aea 2116 struct v4l2_ctrl *ctrl,
178543a3
HV		 2117 struct v4l2_ctrl_ref **ctrl_ref,
2118 bool from_other_dev, bool allocate_req)
0996517c
HV		 2119{
2120 struct v4l2_ctrl_ref *ref;
2121 struct v4l2_ctrl_ref *new_ref;
2122 u32 id = ctrl->id;
0f8017be 2123 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c 2124 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
178543a3
HV		 2125 unsigned int size_extra_req = 0;
2126
2127 if (ctrl_ref)
2128 *ctrl_ref = NULL;
0996517c 2129
d9a25471
HV		 2130 /*
2131 * Automatically add the control class if it is not yet present and
2132 * the new control is not a compound control.
2133 */
2134 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
2135 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 2136 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
2137 return hdl->error;
2138
2139 if (hdl->error)
2140 return hdl->error;
2141
178543a3
HV		 2142 if (allocate_req)
2143 size_extra_req = ctrl->elems * ctrl->elem_size;
2144 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
0996517c
HV		 2145 if (!new_ref)
2146 return handler_set_err(hdl, -ENOMEM);
2147 new_ref->ctrl = ctrl;
da1b1aea 2148 new_ref->from_other_dev = from_other_dev;
178543a3
HV		 2149 if (size_extra_req)
2150 new_ref->p_req.p = &new_ref[1];
2151
0996517c
HV		 2152 if (ctrl->handler == hdl) {
2153 /* By default each control starts in a cluster of its own.
2154 new_ref->ctrl is basically a cluster array with one
2155 element, so that's perfect to use as the cluster pointer.
2156 But only do this for the handler that owns the control. */
2157 ctrl->cluster = &new_ref->ctrl;
2158 ctrl->ncontrols = 1;
2159 }
2160
2161 INIT_LIST_HEAD(&new_ref->node);
2162
77e7c4e6 2163 mutex_lock(hdl->lock);
0996517c
HV		 2164
2165 /* Add immediately at the end of the list if the list is empty, or if
2166 the last element in the list has a lower ID.
2167 This ensures that when elements are added in ascending order the
2168 insertion is an O(1) operation. */
2169 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
2170 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
2171 goto insert_in_hash;
2172 }
2173
2174 /* Find insert position in sorted list */
2175 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2176 if (ref->ctrl->id < id)
2177 continue;
2178 /* Don't add duplicates */
2179 if (ref->ctrl->id == id) {
2180 kfree(new_ref);
2181 goto unlock;
2182 }
2183 list_add(&new_ref->node, ref->node.prev);
2184 break;
2185 }
2186
2187insert_in_hash:
2188 /* Insert the control node in the hash */
2189 new_ref->next = hdl->buckets[bucket];
2190 hdl->buckets[bucket] = new_ref;
178543a3
HV		 2191 if (ctrl_ref)
2192 *ctrl_ref = new_ref;
0996517c
HV		 2193
2194unlock:
77e7c4e6 2195 mutex_unlock(hdl->lock);
0996517c
HV		 2196 return 0;
2197}
2198
2199/* Add a new control */
2200static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
2201 const struct v4l2_ctrl_ops *ops,
0176077a 2202 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 2203 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 2204 s64 min, s64 max, u64 step, s64 def,
20d88eef 2205 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 2206 u32 flags, const char * const *qmenu,
2207 const s64 *qmenu_int, void *priv)
0996517c
HV		 2208{
2209 struct v4l2_ctrl *ctrl;
d9a25471 2210 unsigned sz_extra;
20d88eef
HV		 2211 unsigned nr_of_dims = 0;
2212 unsigned elems = 1;
998e7659
HV		 2213 bool is_array;
2214 unsigned tot_ctrl_size;
302ab7ce 2215 unsigned idx;
d9a25471 2216 void *data;
2ccbe779 2217 int err;
0996517c
HV		 2218
2219 if (hdl->error)
2220 return NULL;
2221
20d88eef
HV		 2222 while (dims && dims[nr_of_dims]) {
2223 elems *= dims[nr_of_dims];
2224 nr_of_dims++;
2225 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
2226 break;
2227 }
998e7659 2228 is_array = nr_of_dims > 0;
20d88eef 2229
dda4a4d5 2230 /* Prefill elem_size for all types handled by std_type_ops */
95140634 2231 switch ((u32)type) {
dda4a4d5 2232 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 2233 elem_size = sizeof(s64);
dda4a4d5
HV		 2234 break;
2235 case V4L2_CTRL_TYPE_STRING:
d9a25471 2236 elem_size = max + 1;
dda4a4d5
HV		 2237 break;
2238 case V4L2_CTRL_TYPE_U8:
2239 elem_size = sizeof(u8);
2240 break;
2241 case V4L2_CTRL_TYPE_U16:
2242 elem_size = sizeof(u16);
2243 break;
811c5081
HV		 2244 case V4L2_CTRL_TYPE_U32:
2245 elem_size = sizeof(u32);
2246 break;
c27bb30e
PK		 2247 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
2248 elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
2249 break;
2250 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
2251 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
2252 break;
2495f39c
DH		 2253 case V4L2_CTRL_TYPE_FWHT_PARAMS:
2254 elem_size = sizeof(struct v4l2_ctrl_fwht_params);
2255 break;
dda4a4d5
HV		 2256 default:
2257 if (type < V4L2_CTRL_COMPOUND_TYPES)
2258 elem_size = sizeof(s32);
2259 break;
2260 }
998e7659 2261 tot_ctrl_size = elem_size * elems;
d9a25471 2262
0996517c 2263 /* Sanity checks */
998e7659
HV		 2264 if (id == 0 || name == NULL || !elem_size ||
2265 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 2266 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 2267 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 2268 handler_set_err(hdl, -ERANGE);
2269 return NULL;
2270 }
2ccbe779
SN		 2271 err = check_range(type, min, max, step, def);
2272 if (err) {
2273 handler_set_err(hdl, err);
02ac0480
HV		 2274 return NULL;
2275 }
998e7659
HV		 2276 if (is_array &&
2277 (type == V4L2_CTRL_TYPE_BUTTON ||
2278 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2279 handler_set_err(hdl, -EINVAL);
2280 return NULL;
2281 }
0996517c 2282
d9a25471 2283 sz_extra = 0;
0996517c 2284 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 2285 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2286 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 2287 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2288 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 2289 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2290 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 2291 type >= V4L2_CTRL_COMPOUND_TYPES ||
2292 is_array)
2293 sz_extra += 2 * tot_ctrl_size;
0996517c 2294
758d90e1 2295 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
0996517c
HV		 2296 if (ctrl == NULL) {
2297 handler_set_err(hdl, -ENOMEM);
2298 return NULL;
2299 }
2300
2301 INIT_LIST_HEAD(&ctrl->node);
77068d36 2302 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2303 ctrl->handler = hdl;
2304 ctrl->ops = ops;
0176077a 2305 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2306 ctrl->id = id;
2307 ctrl->name = name;
2308 ctrl->type = type;
2309 ctrl->flags = flags;
2310 ctrl->minimum = min;
2311 ctrl->maximum = max;
2312 ctrl->step = step;
d9a25471 2313 ctrl->default_value = def;
998e7659
HV		 2314 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2315 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2316 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2317 ctrl->is_array = is_array;
20d88eef
HV		 2318 ctrl->elems = elems;
2319 ctrl->nr_of_dims = nr_of_dims;
2320 if (nr_of_dims)
2321 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2322 ctrl->elem_size = elem_size;
ce580fe5
SA		 2323 if (type == V4L2_CTRL_TYPE_MENU)
2324 ctrl->qmenu = qmenu;
2325 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2326 ctrl->qmenu_int = qmenu_int;
0996517c 2327 ctrl->priv = priv;
d9a25471 2328 ctrl->cur.val = ctrl->val = def;
2a9ec373 2329 data = &ctrl[1];
d9a25471 2330
2a9ec373
HV		 2331 if (!ctrl->is_int) {
2332 ctrl->p_new.p = data;
998e7659 2333 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2334 } else {
2335 ctrl->p_new.p = &ctrl->val;
2336 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2337 }
302ab7ce
HV		 2338 for (idx = 0; idx < elems; idx++) {
2339 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2340 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2341 }
0176077a 2342
178543a3 2343 if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
758d90e1 2344 kvfree(ctrl);
0996517c
HV		 2345 return NULL;
2346 }
77e7c4e6 2347 mutex_lock(hdl->lock);
0996517c 2348 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2349 mutex_unlock(hdl->lock);
0996517c
HV		 2350 return ctrl;
2351}
2352
2353struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2354 const struct v4l2_ctrl_config *cfg, void *priv)
2355{
2356 bool is_menu;
2357 struct v4l2_ctrl *ctrl;
2358 const char *name = cfg->name;
513521ea 2359 const char * const *qmenu = cfg->qmenu;
ce580fe5 2360 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2361 enum v4l2_ctrl_type type = cfg->type;
2362 u32 flags = cfg->flags;
0ba2aeb6
HV		 2363 s64 min = cfg->min;
2364 s64 max = cfg->max;
2365 u64 step = cfg->step;
2366 s64 def = cfg->def;
0996517c
HV		 2367
2368 if (name == NULL)
2369 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2370 &def, &flags);
2371
ce580fe5
SA		 2372 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2373 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2374 if (is_menu)
2375 WARN_ON(step);
2376 else
2377 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2378 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2379 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2380 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2381 qmenu_int == NULL) {
2382 handler_set_err(hdl, -EINVAL);
2383 return NULL;
2384 }
0996517c 2385
0176077a 2386 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2387 type, min, max,
20d88eef
HV		 2388 is_menu ? cfg->menu_skip_mask : step, def,
2389 cfg->dims, cfg->elem_size,
d9a25471 2390 flags, qmenu, qmenu_int, priv);
88365105 2391 if (ctrl)
0996517c 2392 ctrl->is_private = cfg->is_private;
0996517c
HV		 2393 return ctrl;
2394}
2395EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2396
2397/* Helper function for standard non-menu controls */
2398struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2399 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2400 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2401{
2402 const char *name;
2403 enum v4l2_ctrl_type type;
2404 u32 flags;
2405
2406 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2407 if (type == V4L2_CTRL_TYPE_MENU ||
2408 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2409 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2410 handler_set_err(hdl, -EINVAL);
2411 return NULL;
2412 }
0176077a 2413 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2414 min, max, step, def, NULL, 0,
d9a25471 2415 flags, NULL, NULL, NULL);
0996517c
HV		 2416}
2417EXPORT_SYMBOL(v4l2_ctrl_new_std);
2418
2419/* Helper function for standard menu controls */
2420struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2421 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2422 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2423{
d1e9b7c1
SN		 2424 const char * const *qmenu = NULL;
2425 const s64 *qmenu_int = NULL;
fbbb29a6 2426 unsigned int qmenu_int_len = 0;
0996517c
HV		 2427 const char *name;
2428 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2429 s64 min;
2430 s64 max = _max;
2431 s64 def = _def;
2432 u64 step;
0996517c
HV		 2433 u32 flags;
2434
2435 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2436
2437 if (type == V4L2_CTRL_TYPE_MENU)
2438 qmenu = v4l2_ctrl_get_menu(id);
2439 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2440 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2441
2442 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2443 handler_set_err(hdl, -EINVAL);
2444 return NULL;
2445 }
0176077a 2446 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2447 0, max, mask, def, NULL, 0,
d9a25471 2448 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2449}
2450EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2451
117a711a
LP		 2452/* Helper function for standard menu controls with driver defined menu */
2453struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2454 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2455 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2456{
2457 enum v4l2_ctrl_type type;
2458 const char *name;
2459 u32 flags;
0ba2aeb6
HV		 2460 u64 step;
2461 s64 min;
2462 s64 max = _max;
2463 s64 def = _def;
117a711a
LP		 2464
2465 /* v4l2_ctrl_new_std_menu_items() should only be called for
2466 * standard controls without a standard menu.
2467 */
2468 if (v4l2_ctrl_get_menu(id)) {
2469 handler_set_err(hdl, -EINVAL);
2470 return NULL;
2471 }
2472
2473 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2474 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2475 handler_set_err(hdl, -EINVAL);
2476 return NULL;
2477 }
0176077a 2478 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2479 0, max, mask, def, NULL, 0,
2480 flags, qmenu, NULL, NULL);
117a711a
LP		 2481
2482}
2483EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2484
515f3287
SN		 2485/* Helper function for standard integer menu controls */
2486struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2487 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2488 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2489{
2490 const char *name;
2491 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2492 s64 min;
2493 u64 step;
2494 s64 max = _max;
2495 s64 def = _def;
515f3287
SN		 2496 u32 flags;
2497
2498 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2499 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2500 handler_set_err(hdl, -EINVAL);
2501 return NULL;
2502 }
0176077a 2503 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2504 0, max, 0, def, NULL, 0,
d9a25471 2505 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2506}
2507EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2508
0996517c
HV		 2509/* Add the controls from another handler to our own. */
2510int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0 2511 struct v4l2_ctrl_handler *add,
da1b1aea
HV		 2512 bool (*filter)(const struct v4l2_ctrl *ctrl),
2513 bool from_other_dev)
0996517c 2514{
072e6602 2515 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2516 int ret = 0;
2517
2518 /* Do nothing if either handler is NULL or if they are the same */
2519 if (!hdl || !add || hdl == add)
2520 return 0;
2521 if (hdl->error)
2522 return hdl->error;
77e7c4e6 2523 mutex_lock(add->lock);
072e6602
HV		 2524 list_for_each_entry(ref, &add->ctrl_refs, node) {
2525 struct v4l2_ctrl *ctrl = ref->ctrl;
2526
0996517c
HV		 2527 /* Skip handler-private controls. */
2528 if (ctrl->is_private)
2529 continue;
6e239399
HV		 2530 /* And control classes */
2531 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2532 continue;
34a6b7d0
HV		 2533 /* Filter any unwanted controls */
2534 if (filter && !filter(ctrl))
2535 continue;
178543a3 2536 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
0996517c
HV		 2537 if (ret)
2538 break;
2539 }
77e7c4e6 2540 mutex_unlock(add->lock);
0996517c
HV		 2541 return ret;
2542}
2543EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2544
34a6b7d0
HV		 2545bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2546{
0f8017be 2547 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2548 return true;
0f8017be 2549 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2550 return true;
34a6b7d0
HV		 2551 switch (ctrl->id) {
2552 case V4L2_CID_AUDIO_MUTE:
2553 case V4L2_CID_AUDIO_VOLUME:
2554 case V4L2_CID_AUDIO_BALANCE:
2555 case V4L2_CID_AUDIO_BASS:
2556 case V4L2_CID_AUDIO_TREBLE:
2557 case V4L2_CID_AUDIO_LOUDNESS:
2558 return true;
2559 default:
2560 break;
2561 }
2562 return false;
2563}
2564EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2565
0996517c
HV		 2566/* Cluster controls */
2567void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2568{
5626b8c7 2569 bool has_volatiles = false;
0996517c
HV		 2570 int i;
2571
2572 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2573 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2574 return;
0996517c
HV		 2575
2576 for (i = 0; i < ncontrols; i++) {
2577 if (controls[i]) {
2578 controls[i]->cluster = controls;
2579 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2580 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2581 has_volatiles = true;
0996517c
HV		 2582 }
2583 }
5626b8c7 2584 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2585}
2586EXPORT_SYMBOL(v4l2_ctrl_cluster);
2587
72d877ca
HV		 2588void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2589 u8 manual_val, bool set_volatile)
2590{
2591 struct v4l2_ctrl *master = controls[0];
5626b8c7 2592 u32 flag = 0;
72d877ca
HV		 2593 int i;
2594
2595 v4l2_ctrl_cluster(ncontrols, controls);
2596 WARN_ON(ncontrols <= 1);
82a7c049 2597 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2598 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2599 master->is_auto = true;
5626b8c7 2600 master->has_volatiles = set_volatile;
72d877ca
HV		 2601 master->manual_mode_value = manual_val;
2602 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2603
2604 if (!is_cur_manual(master))
2605 flag = V4L2_CTRL_FLAG_INACTIVE |
2606 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2607
2608 for (i = 1; i < ncontrols; i++)
88365105 2609 if (controls[i])
72d877ca 2610 controls[i]->flags |= flag;
72d877ca
HV		 2611}
2612EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2613
0996517c
HV		 2614/* Activate/deactivate a control. */
2615void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2616{
6e239399
HV		 2617 /* invert since the actual flag is called 'inactive' */
2618 bool inactive = !active;
2619 bool old;
2620
0996517c
HV		 2621 if (ctrl == NULL)
2622 return;
2623
6e239399 2624 if (inactive)
0996517c 2625 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2626 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2627 else
2628 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2629 old = test_and_clear_bit(4, &ctrl->flags);
2630 if (old != inactive)
2631 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2632}
2633EXPORT_SYMBOL(v4l2_ctrl_activate);
2634
7a9b109d 2635void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
0996517c 2636{
6e239399
HV		 2637 bool old;
2638
0996517c
HV		 2639 if (ctrl == NULL)
2640 return;
2641
7a9b109d
SA		 2642 lockdep_assert_held(ctrl->handler->lock);
2643
0996517c
HV		 2644 if (grabbed)
2645 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2646 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2647 else
2648 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2649 old = test_and_clear_bit(1, &ctrl->flags);
2650 if (old != grabbed)
2651 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c 2652}
7a9b109d 2653EXPORT_SYMBOL(__v4l2_ctrl_grab);
0996517c
HV		 2654
2655/* Log the control name and value */
2656static void log_ctrl(const struct v4l2_ctrl *ctrl,
2657 const char *prefix, const char *colon)
2658{
0996517c
HV		 2659 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2660 return;
2661 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2662 return;
2663
7eafbce9 2664 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2665
0176077a
HV		 2666 ctrl->type_ops->log(ctrl);
2667
88365105
HV		 2668 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2669 V4L2_CTRL_FLAG_GRABBED |
2670 V4L2_CTRL_FLAG_VOLATILE)) {
2671 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2672 pr_cont(" inactive");
88365105 2673 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2674 pr_cont(" grabbed");
88365105 2675 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2676 pr_cont(" volatile");
88365105 2677 }
7eafbce9 2678 pr_cont("\n");
0996517c
HV		 2679}
2680
2681/* Log all controls owned by the handler */
2682void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2683 const char *prefix)
2684{
2685 struct v4l2_ctrl *ctrl;
2686 const char *colon = "";
2687 int len;
2688
2689 if (hdl == NULL)
2690 return;
2691 if (prefix == NULL)
2692 prefix = "";
2693 len = strlen(prefix);
2694 if (len && prefix[len - 1] != ' ')
2695 colon = ": ";
77e7c4e6 2696 mutex_lock(hdl->lock);
0996517c
HV		 2697 list_for_each_entry(ctrl, &hdl->ctrls, node)
2698 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2699 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2700 mutex_unlock(hdl->lock);
0996517c
HV		 2701}
2702EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2703
ffa9b9f0
SN		 2704int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2705{
2706 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2707 return 0;
2708}
2709EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2710
0996517c 2711/* Call s_ctrl for all controls owned by the handler */
cc0140e2 2712int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
0996517c
HV		 2713{
2714 struct v4l2_ctrl *ctrl;
2715 int ret = 0;
2716
2717 if (hdl == NULL)
2718 return 0;
cc0140e2
SA		 2719
2720 lockdep_assert_held(hdl->lock);
2721
0996517c
HV		 2722 list_for_each_entry(ctrl, &hdl->ctrls, node)
2723 ctrl->done = false;
2724
2725 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2726 struct v4l2_ctrl *master = ctrl->cluster[0];
2727 int i;
2728
2729 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2730 /* Skip button controls and read-only controls. */
2731 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2732 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2733 continue;
2734
2a863793
HV		 2735 for (i = 0; i < master->ncontrols; i++) {
2736 if (master->cluster[i]) {
2737 cur_to_new(master->cluster[i]);
2738 master->cluster[i]->is_new = 1;
71c6c4c9 2739 master->cluster[i]->done = true;
2a863793
HV		 2740 }
2741 }
54c911eb 2742 ret = call_op(master, s_ctrl);
0996517c
HV		 2743 if (ret)
2744 break;
0996517c 2745 }
cc0140e2
SA		 2746
2747 return ret;
2748}
2749EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
2750
2751int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2752{
2753 int ret;
2754
2755 if (hdl == NULL)
2756 return 0;
2757
2758 mutex_lock(hdl->lock);
2759 ret = __v4l2_ctrl_handler_setup(hdl);
77e7c4e6 2760 mutex_unlock(hdl->lock);
cc0140e2 2761
0996517c
HV		 2762 return ret;
2763}
2764EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2765
d9a25471
HV		 2766/* Implement VIDIOC_QUERY_EXT_CTRL */
2767int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2768{
d9a25471 2769 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2770 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2771 struct v4l2_ctrl_ref *ref;
2772 struct v4l2_ctrl *ctrl;
2773
2774 if (hdl == NULL)
2775 return -EINVAL;
2776
77e7c4e6 2777 mutex_lock(hdl->lock);
0996517c
HV		 2778
2779 /* Try to find it */
2780 ref = find_ref(hdl, id);
2781
d9a25471
HV		 2782 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2783 bool is_compound;
2784 /* Match any control that is not hidden */
2785 unsigned mask = 1;
2786 bool match = false;
2787
2788 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2789 /* Match any hidden control */
2790 match = true;
2791 } else if ((qc->id & next_flags) == next_flags) {
2792 /* Match any control, compound or not */
2793 mask = 0;
2794 }
2795
0996517c
HV		 2796 /* Find the next control with ID > qc->id */
2797
2798 /* Did we reach the end of the control list? */
2799 if (id >= node2id(hdl->ctrl_refs.prev)) {
2800 ref = NULL; /* Yes, so there is no next control */
2801 } else if (ref) {
2802 /* We found a control with the given ID, so just get
d9a25471
HV		 2803 the next valid one in the list. */
2804 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2805 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2806 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2807 if (id < ref->ctrl->id &&
2808 (is_compound & mask) == match)
2809 break;
2810 }
2811 if (&ref->node == &hdl->ctrl_refs)
2812 ref = NULL;
0996517c
HV		 2813 } else {
2814 /* No control with the given ID exists, so start
2815 searching for the next largest ID. We know there
2816 is one, otherwise the first 'if' above would have
2817 been true. */
d9a25471 2818 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2819 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2820 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2821 if (id < ref->ctrl->id &&
2822 (is_compound & mask) == match)
0996517c 2823 break;
d9a25471
HV		 2824 }
2825 if (&ref->node == &hdl->ctrl_refs)
2826 ref = NULL;
0996517c
HV		 2827 }
2828 }
77e7c4e6 2829 mutex_unlock(hdl->lock);
d9a25471 2830
0996517c
HV		 2831 if (!ref)
2832 return -EINVAL;
2833
2834 ctrl = ref->ctrl;
2835 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2836 if (id >= V4L2_CID_PRIVATE_BASE)
2837 qc->id = id;
2838 else
2839 qc->id = ctrl->id;
c0decac1 2840 strscpy(qc->name, ctrl->name, sizeof(qc->name));
9cac9d2f 2841 qc->flags = user_flags(ctrl);
d9a25471 2842 qc->type = ctrl->type;
d9a25471 2843 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2844 qc->elems = ctrl->elems;
2845 qc->nr_of_dims = ctrl->nr_of_dims;
2846 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2847 qc->minimum = ctrl->minimum;
2848 qc->maximum = ctrl->maximum;
2849 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2850 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2851 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2852 qc->step = 1;
2853 else
2854 qc->step = ctrl->step;
d9a25471
HV		 2855 return 0;
2856}
2857EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2858
2859/* Implement VIDIOC_QUERYCTRL */
2860int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2861{
2862 struct v4l2_query_ext_ctrl qec = { qc->id };
2863 int rc;
2864
2865 rc = v4l2_query_ext_ctrl(hdl, &qec);
2866 if (rc)
2867 return rc;
2868
2869 qc->id = qec.id;
2870 qc->type = qec.type;
2871 qc->flags = qec.flags;
c0decac1 2872 strscpy(qc->name, qec.name, sizeof(qc->name));
d9a25471
HV		 2873 switch (qc->type) {
2874 case V4L2_CTRL_TYPE_INTEGER:
2875 case V4L2_CTRL_TYPE_BOOLEAN:
2876 case V4L2_CTRL_TYPE_MENU:
2877 case V4L2_CTRL_TYPE_INTEGER_MENU:
2878 case V4L2_CTRL_TYPE_STRING:
2879 case V4L2_CTRL_TYPE_BITMASK:
2880 qc->minimum = qec.minimum;
2881 qc->maximum = qec.maximum;
2882 qc->step = qec.step;
2883 qc->default_value = qec.default_value;
2884 break;
2885 default:
2886 qc->minimum = 0;
2887 qc->maximum = 0;
2888 qc->step = 0;
2889 qc->default_value = 0;
2890 break;
2891 }
0996517c
HV		 2892 return 0;
2893}
2894EXPORT_SYMBOL(v4l2_queryctrl);
2895
0996517c
HV		 2896/* Implement VIDIOC_QUERYMENU */
2897int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2898{
2899 struct v4l2_ctrl *ctrl;
2900 u32 i = qm->index;
2901
2902 ctrl = v4l2_ctrl_find(hdl, qm->id);
2903 if (!ctrl)
2904 return -EINVAL;
2905
2906 qm->reserved = 0;
2907 /* Sanity checks */
ce580fe5
SA		 2908 switch (ctrl->type) {
2909 case V4L2_CTRL_TYPE_MENU:
2910 if (ctrl->qmenu == NULL)
2911 return -EINVAL;
2912 break;
2913 case V4L2_CTRL_TYPE_INTEGER_MENU:
2914 if (ctrl->qmenu_int == NULL)
2915 return -EINVAL;
2916 break;
2917 default:
2918 return -EINVAL;
2919 }
2920
2921 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2922 return -EINVAL;
ce580fe5 2923
0996517c 2924 /* Use mask to see if this menu item should be skipped */
d7a955c8 2925 if (ctrl->menu_skip_mask & (1ULL << i))
0996517c
HV		 2926 return -EINVAL;
2927 /* Empty menu items should also be skipped */
ce580fe5
SA		 2928 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2929 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2930 return -EINVAL;
c0decac1 2931 strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
ce580fe5
SA		 2932 } else {
2933 qm->value = ctrl->qmenu_int[i];
2934 }
0996517c
HV		 2935 return 0;
2936}
2937EXPORT_SYMBOL(v4l2_querymenu);
2938
6fa6f831
HV		 2939static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
2940 const struct v4l2_ctrl_handler *from)
2941{
2942 struct v4l2_ctrl_ref *ref;
7390ba43 2943 int err = 0;
6fa6f831
HV		 2944
2945 if (WARN_ON(!hdl || hdl == from))
2946 return -EINVAL;
2947
2948 if (hdl->error)
2949 return hdl->error;
2950
2951 WARN_ON(hdl->lock != &hdl->_lock);
2952
2953 mutex_lock(from->lock);
2954 list_for_each_entry(ref, &from->ctrl_refs, node) {
2955 struct v4l2_ctrl *ctrl = ref->ctrl;
2956 struct v4l2_ctrl_ref *new_ref;
2957
2958 /* Skip refs inherited from other devices */
2959 if (ref->from_other_dev)
2960 continue;
2961 /* And buttons */
2962 if (ctrl->type == V4L2_CTRL_TYPE_BUTTON)
2963 continue;
2964 err = handler_new_ref(hdl, ctrl, &new_ref, false, true);
2965 if (err)
2966 break;
2967 }
2968 mutex_unlock(from->lock);
2969 return err;
2970}
2971
2972static void v4l2_ctrl_request_queue(struct media_request_object *obj)
2973{
2974 struct v4l2_ctrl_handler *hdl =
2975 container_of(obj, struct v4l2_ctrl_handler, req_obj);
2976 struct v4l2_ctrl_handler *main_hdl = obj->priv;
2977 struct v4l2_ctrl_handler *prev_hdl = NULL;
2978 struct v4l2_ctrl_ref *ref_ctrl, *ref_ctrl_prev = NULL;
2979
2980 if (list_empty(&main_hdl->requests_queued))
2981 goto queue;
2982
2983 prev_hdl = list_last_entry(&main_hdl->requests_queued,
2984 struct v4l2_ctrl_handler, requests_queued);
2985 /*
2986 * Note: prev_hdl and hdl must contain the same list of control
2987 * references, so if any differences are detected then that is a
2988 * driver bug and the WARN_ON is triggered.
2989 */
2990 mutex_lock(prev_hdl->lock);
2991 ref_ctrl_prev = list_first_entry(&prev_hdl->ctrl_refs,
2992 struct v4l2_ctrl_ref, node);
2993 list_for_each_entry(ref_ctrl, &hdl->ctrl_refs, node) {
2994 if (ref_ctrl->req)
2995 continue;
2996 while (ref_ctrl_prev->ctrl->id < ref_ctrl->ctrl->id) {
2997 /* Should never happen, but just in case... */
2998 if (list_is_last(&ref_ctrl_prev->node,
2999 &prev_hdl->ctrl_refs))
3000 break;
3001 ref_ctrl_prev = list_next_entry(ref_ctrl_prev, node);
3002 }
3003 if (WARN_ON(ref_ctrl_prev->ctrl->id != ref_ctrl->ctrl->id))
3004 break;
3005 ref_ctrl->req = ref_ctrl_prev->req;
3006 }
3007 mutex_unlock(prev_hdl->lock);
3008queue:
3009 list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued);
3010 hdl->request_is_queued = true;
3011}
3012
3013static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
3014{
3015 struct v4l2_ctrl_handler *hdl =
3016 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3017
3018 list_del_init(&hdl->requests);
3019 if (hdl->request_is_queued) {
3020 list_del_init(&hdl->requests_queued);
3021 hdl->request_is_queued = false;
3022 }
3023}
3024
3025static void v4l2_ctrl_request_release(struct media_request_object *obj)
3026{
3027 struct v4l2_ctrl_handler *hdl =
3028 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3029
3030 v4l2_ctrl_handler_free(hdl);
3031 kfree(hdl);
3032}
3033
3034static const struct media_request_object_ops req_ops = {
3035 .queue = v4l2_ctrl_request_queue,
3036 .unbind = v4l2_ctrl_request_unbind,
3037 .release = v4l2_ctrl_request_release,
3038};
3039
5f611d74
HV		 3040struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
3041 struct v4l2_ctrl_handler *parent)
3042{
3043 struct media_request_object *obj;
3044
3045 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING &&
3046 req->state != MEDIA_REQUEST_STATE_QUEUED))
3047 return NULL;
3048
3049 obj = media_request_object_find(req, &req_ops, parent);
3050 if (obj)
3051 return container_of(obj, struct v4l2_ctrl_handler, req_obj);
3052 return NULL;
3053}
3054EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find);
3055
3056struct v4l2_ctrl *
3057v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
3058{
3059 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
3060
3061 return (ref && ref->req == ref) ? ref->ctrl : NULL;
3062}
3063EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find);
3064
6fa6f831
HV		 3065static int v4l2_ctrl_request_bind(struct media_request *req,
3066 struct v4l2_ctrl_handler *hdl,
3067 struct v4l2_ctrl_handler *from)
3068{
3069 int ret;
3070
3071 ret = v4l2_ctrl_request_clone(hdl, from);
3072
3073 if (!ret) {
3074 ret = media_request_object_bind(req, &req_ops,
3075 from, false, &hdl->req_obj);
3076 if (!ret)
3077 list_add_tail(&hdl->requests, &from->requests);
3078 }
3079 return ret;
3080}
0996517c
HV		 3081
3082/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
3083
3084 It is not a fully atomic operation, just best-effort only. After all, if
3085 multiple controls have to be set through multiple i2c writes (for example)
3086 then some initial writes may succeed while others fail. Thus leaving the
3087 system in an inconsistent state. The question is how much effort you are
3088 willing to spend on trying to make something atomic that really isn't.
3089
3090 From the point of view of an application the main requirement is that
3091 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
3092 error should be returned without actually affecting any controls.
3093
3094 If all the values are correct, then it is acceptable to just give up
3095 in case of low-level errors.
3096
3097 It is important though that the application can tell when only a partial
3098 configuration was done. The way we do that is through the error_idx field
3099 of struct v4l2_ext_controls: if that is equal to the count field then no
3100 controls were affected. Otherwise all controls before that index were
3101 successful in performing their 'get' or 'set' operation, the control at
3102 the given index failed, and you don't know what happened with the controls
3103 after the failed one. Since if they were part of a control cluster they
3104 could have been successfully processed (if a cluster member was encountered
3105 at index < error_idx), they could have failed (if a cluster member was at
3106 error_idx), or they may not have been processed yet (if the first cluster
3107 member appeared after error_idx).
3108
3109 It is all fairly theoretical, though. In practice all you can do is to
3110 bail out. If error_idx == count, then it is an application bug. If
3111 error_idx < count then it is only an application bug if the error code was
3112 EBUSY. That usually means that something started streaming just when you
3113 tried to set the controls. In all other cases it is a driver/hardware
3114 problem and all you can do is to retry or bail out.
3115
3116 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
3117 never modifies controls the error_idx is just set to whatever control
3118 has an invalid value.
3119 */
3120
3121/* Prepare for the extended g/s/try functions.
3122 Find the controls in the control array and do some basic checks. */
3123static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
3124 struct v4l2_ext_controls *cs,
d9a25471
HV		 3125 struct v4l2_ctrl_helper *helpers,
3126 bool get)
0996517c 3127{
eb5b16ef
HV		 3128 struct v4l2_ctrl_helper *h;
3129 bool have_clusters = false;
0996517c
HV		 3130 u32 i;
3131
eb5b16ef 3132 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 3133 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 3134 struct v4l2_ctrl_ref *ref;
0996517c
HV		 3135 struct v4l2_ctrl *ctrl;
3136 u32 id = c->id & V4L2_CTRL_ID_MASK;
3137
37cd3b73 3138 cs->error_idx = i;
0996517c 3139
953eae5d
RR		 3140 if (cs->which &&
3141 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
6fa6f831 3142 cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
953eae5d 3143 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 3144 return -EINVAL;
3145
3146 /* Old-style private controls are not allowed for
3147 extended controls */
3148 if (id >= V4L2_CID_PRIVATE_BASE)
3149 return -EINVAL;
eb5b16ef
HV		 3150 ref = find_ref_lock(hdl, id);
3151 if (ref == NULL)
0996517c 3152 return -EINVAL;
dcea5601 3153 h->ref = ref;
eb5b16ef 3154 ctrl = ref->ctrl;
0996517c
HV		 3155 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
3156 return -EINVAL;
3157
eb5b16ef
HV		 3158 if (ctrl->cluster[0]->ncontrols > 1)
3159 have_clusters = true;
3160 if (ctrl->cluster[0] != ctrl)
3161 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 3162 if (ctrl->is_ptr && !ctrl->is_string) {
3163 unsigned tot_size = ctrl->elems * ctrl->elem_size;
3164
3165 if (c->size < tot_size) {
3166 if (get) {
3167 c->size = tot_size;
3168 return -ENOSPC;
3169 }
3170 return -EFAULT;
d9a25471 3171 }
302ab7ce 3172 c->size = tot_size;
d9a25471 3173 }
eb5b16ef
HV		 3174 /* Store the ref to the master control of the cluster */
3175 h->mref = ref;
eb5b16ef
HV		 3176 /* Initially set next to 0, meaning that there is no other
3177 control in this helper array belonging to the same
3178 cluster */
3179 h->next = 0;
0996517c 3180 }
0996517c 3181
eb5b16ef
HV		 3182 /* We are done if there were no controls that belong to a multi-
3183 control cluster. */
3184 if (!have_clusters)
3185 return 0;
0996517c 3186
eb5b16ef
HV		 3187 /* The code below figures out in O(n) time which controls in the list
3188 belong to the same cluster. */
0996517c 3189
eb5b16ef 3190 /* This has to be done with the handler lock taken. */
77e7c4e6 3191 mutex_lock(hdl->lock);
0996517c 3192
eb5b16ef
HV		 3193 /* First zero the helper field in the master control references */
3194 for (i = 0; i < cs->count; i++)
c082266f 3195 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 3196 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3197 struct v4l2_ctrl_ref *mref = h->mref;
3198
3199 /* If the mref->helper is set, then it points to an earlier
3200 helper that belongs to the same cluster. */
3201 if (mref->helper) {
3202 /* Set the next field of mref->helper to the current
3203 index: this means that that earlier helper now
3204 points to the next helper in the same cluster. */
3205 mref->helper->next = i;
3206 /* mref should be set only for the first helper in the
3207 cluster, clear the others. */
3208 h->mref = NULL;
3209 }
3210 /* Point the mref helper to the current helper struct. */
3211 mref->helper = h;
0996517c 3212 }
77e7c4e6 3213 mutex_unlock(hdl->lock);
eb5b16ef 3214 return 0;
0996517c
HV		 3215}
3216
3217/* Handles the corner case where cs->count == 0. It checks whether the
3218 specified control class exists. If that class ID is 0, then it checks
3219 whether there are any controls at all. */
0f8017be 3220static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 3221{
6fa6f831
HV		 3222 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL ||
3223 which == V4L2_CTRL_WHICH_REQUEST_VAL)
cecfe9b8 3224 return 0;
0f8017be 3225 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 3226}
3227
0996517c 3228/* Get extended controls. Allocates the helpers array if needed. */
c41e9cff
HV		 3229static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
3230 struct v4l2_ext_controls *cs)
0996517c 3231{
eb5b16ef
HV		 3232 struct v4l2_ctrl_helper helper[4];
3233 struct v4l2_ctrl_helper *helpers = helper;
0996517c 3234 int ret;
ddac5c10 3235 int i, j;
953eae5d
RR		 3236 bool def_value;
3237
3238 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 3239
3240 cs->error_idx = cs->count;
0f8017be 3241 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 3242
3243 if (hdl == NULL)
3244 return -EINVAL;
3245
3246 if (cs->count == 0)
0f8017be 3247 return class_check(hdl, cs->which);
0996517c
HV		 3248
3249 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3250 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3251 GFP_KERNEL);
0996517c
HV		 3252 if (helpers == NULL)
3253 return -ENOMEM;
3254 }
3255
d9a25471 3256 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 3257 cs->error_idx = cs->count;
0996517c
HV		 3258
3259 for (i = 0; !ret && i < cs->count; i++)
dcea5601 3260 if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
0996517c
HV		 3261 ret = -EACCES;
3262
3263 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 3264 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 3265 struct v4l2_ctrl *ctrl);
eb5b16ef 3266 struct v4l2_ctrl *master;
0996517c 3267
953eae5d
RR		 3268 ctrl_to_user = def_value ? def_to_user : cur_to_user;
3269
eb5b16ef 3270 if (helpers[i].mref == NULL)
0996517c
HV		 3271 continue;
3272
eb5b16ef 3273 master = helpers[i].mref->ctrl;
0996517c
HV		 3274 cs->error_idx = i;
3275
3276 v4l2_ctrl_lock(master);
ddac5c10
HV		 3277
3278 /* g_volatile_ctrl will update the new control values */
953eae5d
RR		 3279 if (!def_value &&
3280 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
3281 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 3282 for (j = 0; j < master->ncontrols; j++)
3283 cur_to_new(master->cluster[j]);
54c911eb 3284 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 3285 ctrl_to_user = new_to_user;
ddac5c10
HV		 3286 }
3287 /* If OK, then copy the current (for non-volatile controls)
3288 or the new (for volatile controls) control values to the
3289 caller */
eb5b16ef
HV		 3290 if (!ret) {
3291 u32 idx = i;
3292
3293 do {
6fa6f831
HV		 3294 if (helpers[idx].ref->req)
3295 ret = req_to_user(cs->controls + idx,
3296 helpers[idx].ref->req);
3297 else
3298 ret = ctrl_to_user(cs->controls + idx,
3299 helpers[idx].ref->ctrl);
eb5b16ef
HV		 3300 idx = helpers[idx].next;
3301 } while (!ret && idx);
3302 }
0996517c 3303 v4l2_ctrl_unlock(master);
0996517c
HV		 3304 }
3305
3306 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3307 kvfree(helpers);
0996517c
HV		 3308 return ret;
3309}
c41e9cff
HV		 3310
3311static struct media_request_object *
3312v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
3313 struct media_request *req, bool set)
3314{
3315 struct media_request_object *obj;
3316 struct v4l2_ctrl_handler *new_hdl;
3317 int ret;
3318
3319 if (IS_ERR(req))
3320 return ERR_CAST(req);
3321
3322 if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
3323 return ERR_PTR(-EBUSY);
3324
3325 obj = media_request_object_find(req, &req_ops, hdl);
3326 if (obj)
3327 return obj;
3328 if (!set)
3329 return ERR_PTR(-ENOENT);
3330
3331 new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
3332 if (!new_hdl)
3333 return ERR_PTR(-ENOMEM);
3334
3335 obj = &new_hdl->req_obj;
3336 ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
3337 if (!ret)
3338 ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
3339 if (ret) {
3340 kfree(new_hdl);
3341
3342 return ERR_PTR(ret);
3343 }
3344
3345 media_request_object_get(obj);
3346 return obj;
3347}
3348
3349int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3350 struct v4l2_ext_controls *cs)
3351{
3352 struct media_request_object *obj = NULL;
ca6c1633 3353 struct media_request *req = NULL;
c41e9cff
HV		 3354 int ret;
3355
3356 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
c41e9cff
HV		 3357 if (!mdev || cs->request_fd < 0)
3358 return -EINVAL;
3359
3360 req = media_request_get_by_fd(mdev, cs->request_fd);
3361 if (IS_ERR(req))
3362 return PTR_ERR(req);
3363
b6b84557 3364 if (req->state != MEDIA_REQUEST_STATE_COMPLETE) {
c41e9cff 3365 media_request_put(req);
b6b84557 3366 return -EACCES;
c41e9cff
HV		 3367 }
3368
ca6c1633
HV		 3369 ret = media_request_lock_for_access(req);
3370 if (ret) {
3371 media_request_put(req);
3372 return ret;
3373 }
3374
c41e9cff 3375 obj = v4l2_ctrls_find_req_obj(hdl, req, false);
ca6c1633
HV		 3376 if (IS_ERR(obj)) {
3377 media_request_unlock_for_access(req);
3378 media_request_put(req);
c41e9cff 3379 return PTR_ERR(obj);
ca6c1633 3380 }
c41e9cff
HV		 3381
3382 hdl = container_of(obj, struct v4l2_ctrl_handler,
3383 req_obj);
3384 }
3385
3386 ret = v4l2_g_ext_ctrls_common(hdl, cs);
3387
ca6c1633
HV		 3388 if (obj) {
3389 media_request_unlock_for_access(req);
c41e9cff 3390 media_request_object_put(obj);
ca6c1633
HV		 3391 media_request_put(req);
3392 }
c41e9cff
HV		 3393 return ret;
3394}
0996517c
HV		 3395EXPORT_SYMBOL(v4l2_g_ext_ctrls);
3396
0996517c 3397/* Helper function to get a single control */
03d5285b 3398static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 3399{
3400 struct v4l2_ctrl *master = ctrl->cluster[0];
3401 int ret = 0;
ddac5c10 3402 int i;
0996517c 3403
d9a25471 3404 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 3405 * cur_to_user() calls below would need to be modified not to access
3406 * userspace memory when called from get_ctrl().
3407 */
a8077734 3408 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 3409 return -EINVAL;
3410
0996517c
HV		 3411 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
3412 return -EACCES;
3413
3414 v4l2_ctrl_lock(master);
3415 /* g_volatile_ctrl will update the current control values */
5626b8c7 3416 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 3417 for (i = 0; i < master->ncontrols; i++)
3418 cur_to_new(master->cluster[i]);
54c911eb 3419 ret = call_op(master, g_volatile_ctrl);
03d5285b 3420 new_to_user(c, ctrl);
ddac5c10 3421 } else {
03d5285b 3422 cur_to_user(c, ctrl);
ddac5c10 3423 }
0996517c
HV		 3424 v4l2_ctrl_unlock(master);
3425 return ret;
3426}
3427
3428int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
3429{
3430 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 3431 struct v4l2_ext_control c;
3432 int ret;
0996517c 3433
d9a25471 3434 if (ctrl == NULL || !ctrl->is_int)
0996517c 3435 return -EINVAL;
03d5285b
LP		 3436 ret = get_ctrl(ctrl, &c);
3437 control->value = c.value;
3438 return ret;
0996517c
HV		 3439}
3440EXPORT_SYMBOL(v4l2_g_ctrl);
3441
0996517c
HV		 3442s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
3443{
03d5285b 3444 struct v4l2_ext_control c;
0996517c
HV		 3445
3446 /* It's a driver bug if this happens. */
d9a25471 3447 WARN_ON(!ctrl->is_int);
03d5285b
LP		 3448 c.value = 0;
3449 get_ctrl(ctrl, &c);
3450 return c.value;
0996517c
HV		 3451}
3452EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
3453
03d5285b
LP		 3454s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
3455{
3456 struct v4l2_ext_control c;
3457
3458 /* It's a driver bug if this happens. */
998e7659 3459 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 3460 c.value64 = 0;
03d5285b 3461 get_ctrl(ctrl, &c);
a8077734 3462 return c.value64;
03d5285b
LP		 3463}
3464EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
3465
0996517c
HV		 3466
3467/* Core function that calls try/s_ctrl and ensures that the new value is
3468 copied to the current value on a set.
3469 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 3470static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
3471 bool set, u32 ch_flags)
0996517c 3472{
72d877ca 3473 bool update_flag;
eb5b16ef 3474 int ret;
0996517c
HV		 3475 int i;
3476
3477 /* Go through the cluster and either validate the new value or
3478 (if no new value was set), copy the current value to the new
3479 value, ensuring a consistent view for the control ops when
3480 called. */
eb5b16ef 3481 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 3482 struct v4l2_ctrl *ctrl = master->cluster[i];
3483
3484 if (ctrl == NULL)
3485 continue;
3486
eb5b16ef
HV		 3487 if (!ctrl->is_new) {
3488 cur_to_new(ctrl);
0996517c
HV		 3489 continue;
3490 }
eb5b16ef
HV		 3491 /* Check again: it may have changed since the
3492 previous check in try_or_set_ext_ctrls(). */
3493 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3494 return -EBUSY;
0996517c
HV		 3495 }
3496
eb5b16ef 3497 ret = call_op(master, try_ctrl);
0996517c
HV		 3498
3499 /* Don't set if there is no change */
72d877ca
HV		 3500 if (ret || !set || !cluster_changed(master))
3501 return ret;
3502 ret = call_op(master, s_ctrl);
72d877ca
HV		 3503 if (ret)
3504 return ret;
3505
eb5b16ef 3506 /* If OK, then make the new values permanent. */
72d877ca 3507 update_flag = is_cur_manual(master) != is_new_manual(master);
0245abf8
HV		 3508
3509 for (i = 0; i < master->ncontrols; i++) {
3510 /*
3511 * If we switch from auto to manual mode, and this cluster
3512 * contains volatile controls, then all non-master controls
3513 * have to be marked as changed. The 'new' value contains
3514 * the volatile value (obtained by update_from_auto_cluster),
3515 * which now has to become the current value.
3516 */
3517 if (i && update_flag && is_new_manual(master) &&
3518 master->has_volatiles && master->cluster[i])
3519 master->cluster[i]->has_changed = true;
3520
2ccbe779
SN		 3521 new_to_cur(fh, master->cluster[i], ch_flags |
3522 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
0245abf8 3523 }
72d877ca 3524 return 0;
0996517c
HV		 3525}
3526
e6402585
HV		 3527/* Validate controls. */
3528static int validate_ctrls(struct v4l2_ext_controls *cs,
3529 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3530{
e6402585 3531 unsigned i;
0996517c
HV		 3532 int ret = 0;
3533
eb5b16ef 3534 cs->error_idx = cs->count;
0996517c 3535 for (i = 0; i < cs->count; i++) {
dcea5601 3536 struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
7a7f1ab3 3537 union v4l2_ctrl_ptr p_new;
0996517c 3538
e6402585 3539 cs->error_idx = i;
0996517c
HV		 3540
3541 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3542 return -EACCES;
3543 /* This test is also done in try_set_control_cluster() which
3544 is called in atomic context, so that has the final say,
3545 but it makes sense to do an up-front check as well. Once
3546 an error occurs in try_set_control_cluster() some other
3547 controls may have been set already and we want to do a
3548 best-effort to avoid that. */
3549 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3550 return -EBUSY;
7a7f1ab3
HV		 3551 /*
3552 * Skip validation for now if the payload needs to be copied
3553 * from userspace into kernelspace. We'll validate those later.
3554 */
3555 if (ctrl->is_ptr)
3556 continue;
3557 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3558 p_new.p_s64 = &cs->controls[i].value64;
3559 else
3560 p_new.p_s32 = &cs->controls[i].value;
3561 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3562 if (ret)
3563 return ret;
0996517c 3564 }
e6402585
HV		 3565 return 0;
3566}
3567
5626b8c7
HV		 3568/* Obtain the current volatile values of an autocluster and mark them
3569 as new. */
3570static void update_from_auto_cluster(struct v4l2_ctrl *master)
3571{
3572 int i;
3573
759b26a1 3574 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3575 cur_to_new(master->cluster[i]);
3576 if (!call_op(master, g_volatile_ctrl))
3577 for (i = 1; i < master->ncontrols; i++)
3578 if (master->cluster[i])
3579 master->cluster[i]->is_new = 1;
3580}
3581
e6402585 3582/* Try or try-and-set controls */
c41e9cff
HV		 3583static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
3584 struct v4l2_ctrl_handler *hdl,
3585 struct v4l2_ext_controls *cs, bool set)
e6402585
HV		 3586{
3587 struct v4l2_ctrl_helper helper[4];
3588 struct v4l2_ctrl_helper *helpers = helper;
3589 unsigned i, j;
3590 int ret;
3591
3592 cs->error_idx = cs->count;
953eae5d
RR		 3593
3594 /* Default value cannot be changed */
3595 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3596 return -EINVAL;
3597
0f8017be 3598 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3599
3600 if (hdl == NULL)
3601 return -EINVAL;
3602
3603 if (cs->count == 0)
0f8017be 3604 return class_check(hdl, cs->which);
0996517c 3605
e6402585 3606 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3607 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3608 GFP_KERNEL);
e6402585
HV		 3609 if (!helpers)
3610 return -ENOMEM;
3611 }
d9a25471 3612 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3613 if (!ret)
3614 ret = validate_ctrls(cs, helpers, set);
3615 if (ret && set)
3616 cs->error_idx = cs->count;
0996517c 3617 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3618 struct v4l2_ctrl *master;
3619 u32 idx = i;
0996517c 3620
eb5b16ef 3621 if (helpers[i].mref == NULL)
0996517c
HV		 3622 continue;
3623
37cd3b73 3624 cs->error_idx = i;
eb5b16ef
HV		 3625 master = helpers[i].mref->ctrl;
3626 v4l2_ctrl_lock(master);
0996517c 3627
2a863793 3628 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3629 for (j = 0; j < master->ncontrols; j++)
3630 if (master->cluster[j])
2a863793 3631 master->cluster[j]->is_new = 0;
0996517c 3632
5626b8c7
HV		 3633 /* For volatile autoclusters that are currently in auto mode
3634 we need to discover if it will be set to manual mode.
3635 If so, then we have to copy the current volatile values
3636 first since those will become the new manual values (which
3637 may be overwritten by explicit new values from this set
3638 of controls). */
3639 if (master->is_auto && master->has_volatiles &&
3640 !is_cur_manual(master)) {
3641 /* Pick an initial non-manual value */
3642 s32 new_auto_val = master->manual_mode_value + 1;
3643 u32 tmp_idx = idx;
3644
3645 do {
3646 /* Check if the auto control is part of the
3647 list, and remember the new value. */
dcea5601 3648 if (helpers[tmp_idx].ref->ctrl == master)
5626b8c7
HV		 3649 new_auto_val = cs->controls[tmp_idx].value;
3650 tmp_idx = helpers[tmp_idx].next;
3651 } while (tmp_idx);
3652 /* If the new value == the manual value, then copy
3653 the current volatile values. */
3654 if (new_auto_val == master->manual_mode_value)
3655 update_from_auto_cluster(master);
3656 }
3657
0996517c 3658 /* Copy the new caller-supplied control values.
2a863793 3659 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3660 do {
dcea5601 3661 struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;
7a7f1ab3
HV		 3662
3663 ret = user_to_new(cs->controls + idx, ctrl);
3664 if (!ret && ctrl->is_ptr)
3665 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3666 idx = helpers[idx].next;
3667 } while (!ret && idx);
0996517c
HV		 3668
3669 if (!ret)
6fa6f831
HV		 3670 ret = try_or_set_cluster(fh, master,
3671 !hdl->req_obj.req && set, 0);
3672 if (!ret && hdl->req_obj.req && set) {
3673 for (j = 0; j < master->ncontrols; j++) {
3674 struct v4l2_ctrl_ref *ref =
3675 find_ref(hdl, master->cluster[j]->id);
3676
3677 new_to_req(ref);
3678 }
3679 }
0996517c
HV		 3680
3681 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3682 if (!ret) {
3683 idx = i;
3684 do {
adf41b9b 3685 ret = new_to_user(cs->controls + idx,
dcea5601 3686 helpers[idx].ref->ctrl);
eb5b16ef
HV		 3687 idx = helpers[idx].next;
3688 } while (!ret && idx);
3689 }
3690 v4l2_ctrl_unlock(master);
0996517c 3691 }
0996517c 3692
0996517c 3693 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3694 kvfree(helpers);
0996517c
HV		 3695 return ret;
3696}
3697
c41e9cff
HV		 3698static int try_set_ext_ctrls(struct v4l2_fh *fh,
3699 struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3700 struct v4l2_ext_controls *cs, bool set)
3701{
3702 struct media_request_object *obj = NULL;
3703 struct media_request *req = NULL;
3704 int ret;
3705
3706 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
3707 if (!mdev || cs->request_fd < 0)
3708 return -EINVAL;
3709
3710 req = media_request_get_by_fd(mdev, cs->request_fd);
3711 if (IS_ERR(req))
3712 return PTR_ERR(req);
3713
3714 ret = media_request_lock_for_update(req);
3715 if (ret) {
3716 media_request_put(req);
3717 return ret;
3718 }
3719
3720 obj = v4l2_ctrls_find_req_obj(hdl, req, set);
c41e9cff
HV		 3721 if (IS_ERR(obj)) {
3722 media_request_unlock_for_update(req);
ffda0b4c 3723 media_request_put(req);
c41e9cff
HV		 3724 return PTR_ERR(obj);
3725 }
3726 hdl = container_of(obj, struct v4l2_ctrl_handler,
3727 req_obj);
3728 }
3729
3730 ret = try_set_ext_ctrls_common(fh, hdl, cs, set);
3731
3732 if (obj) {
ffda0b4c 3733 media_request_unlock_for_update(req);
c41e9cff 3734 media_request_object_put(obj);
ffda0b4c 3735 media_request_put(req);
c41e9cff
HV		 3736 }
3737
3738 return ret;
3739}
3740
3741int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3742 struct v4l2_ext_controls *cs)
0996517c 3743{
c41e9cff 3744 return try_set_ext_ctrls(NULL, hdl, mdev, cs, false);
0996517c
HV		 3745}
3746EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3747
ab892bac 3748int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
c41e9cff 3749 struct media_device *mdev, struct v4l2_ext_controls *cs)
0996517c 3750{
c41e9cff 3751 return try_set_ext_ctrls(fh, hdl, mdev, cs, true);
0996517c
HV		 3752}
3753EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3754
0996517c 3755/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3756static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3757{
3758 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3759 int ret;
0996517c
HV		 3760 int i;
3761
2a863793 3762 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3763 for (i = 0; i < master->ncontrols; i++)
3764 if (master->cluster[i])
2a863793 3765 master->cluster[i]->is_new = 0;
0996517c 3766
7a7f1ab3
HV		 3767 ret = validate_new(ctrl, ctrl->p_new);
3768 if (ret)
3769 return ret;
5d0360a4 3770
5626b8c7
HV		 3771 /* For autoclusters with volatiles that are switched from auto to
3772 manual mode we have to update the current volatile values since
3773 those will become the initial manual values after such a switch. */
3774 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3775 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3776 update_from_auto_cluster(master);
03d5285b 3777
5d0360a4 3778 ctrl->is_new = 1;
2ccbe779
SN		 3779 return try_or_set_cluster(fh, master, true, ch_flags);
3780}
03d5285b 3781
2ccbe779
SN		 3782/* Helper function for VIDIOC_S_CTRL compatibility */
3783static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3784 struct v4l2_ext_control *c)
3785{
7a7f1ab3 3786 int ret;
2ccbe779 3787
7a7f1ab3
HV		 3788 v4l2_ctrl_lock(ctrl);
3789 user_to_new(c, ctrl);
3790 ret = set_ctrl(fh, ctrl, 0);
3791 if (!ret)
3792 cur_to_user(c, ctrl);
3793 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3794 return ret;
3795}
3796
ab892bac
HV		 3797int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3798 struct v4l2_control *control)
0996517c
HV		 3799{
3800 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3801 struct v4l2_ext_control c = { control->id };
03d5285b 3802 int ret;
0996517c 3803
d9a25471 3804 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3805 return -EINVAL;
3806
7ebbc39f
HV		 3807 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3808 return -EACCES;
3809
03d5285b 3810 c.value = control->value;
2ccbe779 3811 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3812 control->value = c.value;
3813 return ret;
0996517c
HV		 3814}
3815EXPORT_SYMBOL(v4l2_s_ctrl);
3816
0c4348ad 3817int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3818{
0c4348ad 3819 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3820
0996517c 3821 /* It's a driver bug if this happens. */
d9a25471 3822 WARN_ON(!ctrl->is_int);
5d0360a4 3823 ctrl->val = val;
7a7f1ab3 3824 return set_ctrl(NULL, ctrl, 0);
0996517c 3825}
0c4348ad 3826EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3827
0c4348ad 3828int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3829{
0c4348ad 3830 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3831
3832 /* It's a driver bug if this happens. */
998e7659 3833 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3834 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3835 return set_ctrl(NULL, ctrl, 0);
03d5285b 3836}
0c4348ad 3837EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3838
5d0360a4
HV		 3839int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3840{
3841 lockdep_assert_held(ctrl->handler->lock);
3842
3843 /* It's a driver bug if this happens. */
3844 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
c0decac1 3845 strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3846 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3847}
3848EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3849
6fa6f831
HV		 3850void v4l2_ctrl_request_complete(struct media_request *req,
3851 struct v4l2_ctrl_handler *main_hdl)
3852{
3853 struct media_request_object *obj;
3854 struct v4l2_ctrl_handler *hdl;
3855 struct v4l2_ctrl_ref *ref;
3856
3857 if (!req || !main_hdl)
3858 return;
3859
3860 /*
3861 * Note that it is valid if nothing was found. It means
3862 * that this request doesn't have any controls and so just
3863 * wants to leave the controls unchanged.
3864 */
3865 obj = media_request_object_find(req, &req_ops, main_hdl);
3866 if (!obj)
3867 return;
3868 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
3869
3870 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
3871 struct v4l2_ctrl *ctrl = ref->ctrl;
3872 struct v4l2_ctrl *master = ctrl->cluster[0];
3873 unsigned int i;
3874
3875 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
3876 ref->req = ref;
3877
3878 v4l2_ctrl_lock(master);
3879 /* g_volatile_ctrl will update the current control values */
3880 for (i = 0; i < master->ncontrols; i++)
3881 cur_to_new(master->cluster[i]);
3882 call_op(master, g_volatile_ctrl);
3883 new_to_req(ref);
3884 v4l2_ctrl_unlock(master);
3885 continue;
3886 }
3887 if (ref->req == ref)
3888 continue;
3889
3890 v4l2_ctrl_lock(ctrl);
3891 if (ref->req)
3892 ptr_to_ptr(ctrl, ref->req->p_req, ref->p_req);
3893 else
3894 ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req);
3895 v4l2_ctrl_unlock(ctrl);
3896 }
3897
3898 WARN_ON(!hdl->request_is_queued);
3899 list_del_init(&hdl->requests_queued);
3900 hdl->request_is_queued = false;
3901 media_request_object_complete(obj);
3902 media_request_object_put(obj);
3903}
3904EXPORT_SYMBOL(v4l2_ctrl_request_complete);
3905
09ca38a5 3906int v4l2_ctrl_request_setup(struct media_request *req,
6fa6f831
HV		 3907 struct v4l2_ctrl_handler *main_hdl)
3908{
3909 struct media_request_object *obj;
3910 struct v4l2_ctrl_handler *hdl;
3911 struct v4l2_ctrl_ref *ref;
09ca38a5 3912 int ret = 0;
6fa6f831
HV		 3913
3914 if (!req || !main_hdl)
09ca38a5 3915 return 0;
6fa6f831
HV		 3916
3917 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
09ca38a5 3918 return -EBUSY;
6fa6f831
HV		 3919
3920 /*
3921 * Note that it is valid if nothing was found. It means
3922 * that this request doesn't have any controls and so just
3923 * wants to leave the controls unchanged.
3924 */
3925 obj = media_request_object_find(req, &req_ops, main_hdl);
3926 if (!obj)
09ca38a5 3927 return 0;
6fa6f831
HV		 3928 if (obj->completed) {
3929 media_request_object_put(obj);
09ca38a5 3930 return -EBUSY;
6fa6f831
HV		 3931 }
3932 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
3933
3934 list_for_each_entry(ref, &hdl->ctrl_refs, node)
3935 ref->req_done = false;
3936
3937 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
3938 struct v4l2_ctrl *ctrl = ref->ctrl;
3939 struct v4l2_ctrl *master = ctrl->cluster[0];
3940 bool have_new_data = false;
3941 int i;
3942
3943 /*
3944 * Skip if this control was already handled by a cluster.
3945 * Skip button controls and read-only controls.
3946 */
3947 if (ref->req_done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
3948 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
3949 continue;
3950
3951 v4l2_ctrl_lock(master);
3952 for (i = 0; i < master->ncontrols; i++) {
3953 if (master->cluster[i]) {
3954 struct v4l2_ctrl_ref *r =
3955 find_ref(hdl, master->cluster[i]->id);
3956
3957 if (r->req && r == r->req) {
3958 have_new_data = true;
3959 break;
3960 }
3961 }
3962 }
3963 if (!have_new_data) {
3964 v4l2_ctrl_unlock(master);
3965 continue;
3966 }
3967
3968 for (i = 0; i < master->ncontrols; i++) {
3969 if (master->cluster[i]) {
3970 struct v4l2_ctrl_ref *r =
3971 find_ref(hdl, master->cluster[i]->id);
3972
3973 req_to_new(r);
3974 master->cluster[i]->is_new = 1;
3975 r->req_done = true;
3976 }
3977 }
3978 /*
3979 * For volatile autoclusters that are currently in auto mode
3980 * we need to discover if it will be set to manual mode.
3981 * If so, then we have to copy the current volatile values
3982 * first since those will become the new manual values (which
3983 * may be overwritten by explicit new values from this set
3984 * of controls).
3985 */
3986 if (master->is_auto && master->has_volatiles &&
3987 !is_cur_manual(master)) {
3988 s32 new_auto_val = *master->p_new.p_s32;
3989
3990 /*
3991 * If the new value == the manual value, then copy
3992 * the current volatile values.
3993 */
3994 if (new_auto_val == master->manual_mode_value)
3995 update_from_auto_cluster(master);
3996 }
3997
09ca38a5 3998 ret = try_or_set_cluster(NULL, master, true, 0);
6fa6f831 3999 v4l2_ctrl_unlock(master);
09ca38a5
DH		 4000
4001 if (ret)
4002 break;
6fa6f831
HV		 4003 }
4004
4005 media_request_object_put(obj);
09ca38a5 4006 return ret;
6fa6f831
HV		 4007}
4008EXPORT_SYMBOL(v4l2_ctrl_request_setup);
4009
8ac7a949
HV		 4010void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
4011{
4012 if (ctrl == NULL)
4013 return;
4014 if (notify == NULL) {
4015 ctrl->call_notify = 0;
4016 return;
4017 }
4018 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
4019 return;
4020 ctrl->handler->notify = notify;
4021 ctrl->handler->notify_priv = priv;
4022 ctrl->call_notify = 1;
4023}
4024EXPORT_SYMBOL(v4l2_ctrl_notify);
4025
5a573925 4026int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 4027 s64 min, s64 max, u64 step, s64 def)
2ccbe779 4028{
95ad7ff3
RR		 4029 bool value_changed;
4030 bool range_changed = false;
302ab7ce 4031 int ret;
2ccbe779 4032
5a573925
SA		 4033 lockdep_assert_held(ctrl->handler->lock);
4034
2ccbe779
SN		 4035 switch (ctrl->type) {
4036 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 4037 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 4038 case V4L2_CTRL_TYPE_BOOLEAN:
4039 case V4L2_CTRL_TYPE_MENU:
4040 case V4L2_CTRL_TYPE_INTEGER_MENU:
4041 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 4042 case V4L2_CTRL_TYPE_U8:
4043 case V4L2_CTRL_TYPE_U16:
811c5081 4044 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 4045 if (ctrl->is_array)
4046 return -EINVAL;
4047 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 4048 if (ret)
4049 return ret;
4050 break;
4051 default:
4052 return -EINVAL;
4053 }
95ad7ff3
RR		 4054 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
4055 (ctrl->step != step) || ctrl->default_value != def) {
4056 range_changed = true;
4057 ctrl->minimum = min;
4058 ctrl->maximum = max;
4059 ctrl->step = step;
4060 ctrl->default_value = def;
4061 }
7a7f1ab3
HV		 4062 cur_to_new(ctrl);
4063 if (validate_new(ctrl, ctrl->p_new)) {
4064 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4065 *ctrl->p_new.p_s64 = def;
4066 else
4067 *ctrl->p_new.p_s32 = def;
4068 }
4069
4070 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 4071 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 4072 else
95ad7ff3
RR		 4073 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
4074 if (value_changed)
7a7f1ab3 4075 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 4076 else if (range_changed)
2ccbe779 4077 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 4078 return ret;
4079}
5a573925 4080EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 4081
6e6d76cd 4082static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 4083{
3e366149
HG		 4084 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4085
4086 if (ctrl == NULL)
4087 return -EINVAL;
4088
6e239399 4089 v4l2_ctrl_lock(ctrl);
77068d36 4090 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 4091 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 4092 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 4093 struct v4l2_event ev;
c12fcfd6 4094 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 4095
c12fcfd6
HV		 4096 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
4097 changes |= V4L2_EVENT_CTRL_CH_VALUE;
4098 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 4099 /* Mark the queue as active, allowing this initial
4100 event to be accepted. */
4101 sev->elems = elems;
77068d36 4102 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 4103 }
4104 v4l2_ctrl_unlock(ctrl);
3e366149 4105 return 0;
6e239399 4106}
6e239399 4107
3e366149 4108static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 4109{
3e366149
HG		 4110 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4111
814e92b8
HV		 4112 if (ctrl == NULL)
4113 return;
4114
6e239399 4115 v4l2_ctrl_lock(ctrl);
77068d36 4116 list_del(&sev->node);
6e239399
HV		 4117 v4l2_ctrl_unlock(ctrl);
4118}
3e366149
HG		 4119
4120void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
4121{
4122 u32 old_changes = old->u.ctrl.changes;
4123
4124 old->u.ctrl = new->u.ctrl;
4125 old->u.ctrl.changes |= old_changes;
4126}
4127EXPORT_SYMBOL(v4l2_ctrl_replace);
4128
4129void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
4130{
4131 new->u.ctrl.changes |= old->u.ctrl.changes;
4132}
4133EXPORT_SYMBOL(v4l2_ctrl_merge);
4134
4135const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
4136 .add = v4l2_ctrl_add_event,
4137 .del = v4l2_ctrl_del_event,
4138 .replace = v4l2_ctrl_replace,
4139 .merge = v4l2_ctrl_merge,
4140};
4141EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 4142
4143int v4l2_ctrl_log_status(struct file *file, void *fh)
4144{
4145 struct video_device *vfd = video_devdata(file);
4146 struct v4l2_fh *vfh = file->private_data;
4147
4148 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
4149 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
4150 vfd->v4l2_dev->name);
4151 return 0;
4152}
4153EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 4154
4155int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 4156 const struct v4l2_event_subscription *sub)
a26243b0
HV		 4157{
4158 if (sub->type == V4L2_EVENT_CTRL)
3e366149 4159 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 4160 return -EINVAL;
4161}
4162EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
4163
22fa4279
SN		 4164int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
4165 struct v4l2_event_subscription *sub)
4166{
4167 if (!sd->ctrl_handler)
4168 return -EINVAL;
4169 return v4l2_ctrl_subscribe_event(fh, sub);
4170}
4171EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
4172
c23e0cb8 4173__poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
a26243b0
HV		 4174{
4175 struct v4l2_fh *fh = file->private_data;
4176
398d7680 4177 poll_wait(file, &fh->wait, wait);
a26243b0 4178 if (v4l2_event_pending(fh))
a9a08845 4179 return EPOLLPRI;
a26243b0
HV		 4180 return 0;
4181}
4182EXPORT_SYMBOL(v4l2_ctrl_poll);
Linux 6.x block layer and io_uring tree(s)