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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <[email protected]>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
758d90e1 22#include <linux/mm.h>
2b80163c 23#include <linux/slab.h>
35a24636 24#include <linux/export.h>
0996517c
HV		 25#include <media/v4l2-ioctl.h>
26#include <media/v4l2-device.h>
27#include <media/v4l2-ctrls.h>
6e239399 28#include <media/v4l2-event.h>
0996517c
HV		 29#include <media/v4l2-dev.h>
30
ddac5c10
HV		 31#define has_op(master, op) \
32 (master->ops && master->ops->op)
54c911eb 33#define call_op(master, op) \
ddac5c10 34 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 35
0996517c 36/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 37struct v4l2_ctrl_helper {
38 /* Pointer to the control reference of the master control */
39 struct v4l2_ctrl_ref *mref;
dcea5601
HV		 40 /* The control ref corresponding to the v4l2_ext_control ID field. */
41 struct v4l2_ctrl_ref *ref;
eb5b16ef
HV		 42 /* v4l2_ext_control index of the next control belonging to the
43 same cluster, or 0 if there isn't any. */
44 u32 next;
0996517c
HV		 45};
46
72d877ca 47/* Small helper function to determine if the autocluster is set to manual
88365105 48 mode. */
72d877ca
HV		 49static bool is_cur_manual(const struct v4l2_ctrl *master)
50{
51 return master->is_auto && master->cur.val == master->manual_mode_value;
52}
53
54/* Same as above, but this checks the against the new value instead of the
55 current value. */
56static bool is_new_manual(const struct v4l2_ctrl *master)
57{
58 return master->is_auto && master->val == master->manual_mode_value;
59}
60
0996517c
HV		 61/* Returns NULL or a character pointer array containing the menu for
62 the given control ID. The pointer array ends with a NULL pointer.
63 An empty string signifies a menu entry that is invalid. This allows
64 drivers to disable certain options if it is not supported. */
513521ea 65const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 66{
513521ea 67 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 68 "44.1 kHz",
69 "48 kHz",
70 "32 kHz",
71 NULL
72 };
513521ea 73 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 74 "MPEG-1/2 Layer I",
75 "MPEG-1/2 Layer II",
76 "MPEG-1/2 Layer III",
77 "MPEG-2/4 AAC",
78 "AC-3",
79 NULL
80 };
513521ea 81 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 82 "32 kbps",
83 "64 kbps",
84 "96 kbps",
85 "128 kbps",
86 "160 kbps",
87 "192 kbps",
88 "224 kbps",
89 "256 kbps",
90 "288 kbps",
91 "320 kbps",
92 "352 kbps",
93 "384 kbps",
94 "416 kbps",
95 "448 kbps",
96 NULL
97 };
513521ea 98 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 99 "32 kbps",
100 "48 kbps",
101 "56 kbps",
102 "64 kbps",
103 "80 kbps",
104 "96 kbps",
105 "112 kbps",
106 "128 kbps",
107 "160 kbps",
108 "192 kbps",
109 "224 kbps",
110 "256 kbps",
111 "320 kbps",
112 "384 kbps",
113 NULL
114 };
513521ea 115 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 116 "32 kbps",
117 "40 kbps",
118 "48 kbps",
119 "56 kbps",
120 "64 kbps",
121 "80 kbps",
122 "96 kbps",
123 "112 kbps",
124 "128 kbps",
125 "160 kbps",
126 "192 kbps",
127 "224 kbps",
128 "256 kbps",
129 "320 kbps",
130 NULL
131 };
513521ea 132 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 133 "32 kbps",
134 "40 kbps",
135 "48 kbps",
136 "56 kbps",
137 "64 kbps",
138 "80 kbps",
139 "96 kbps",
140 "112 kbps",
141 "128 kbps",
142 "160 kbps",
143 "192 kbps",
144 "224 kbps",
145 "256 kbps",
146 "320 kbps",
147 "384 kbps",
148 "448 kbps",
149 "512 kbps",
150 "576 kbps",
151 "640 kbps",
152 NULL
153 };
513521ea 154 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 155 "Stereo",
156 "Joint Stereo",
157 "Dual",
158 "Mono",
159 NULL
160 };
513521ea 161 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 162 "Bound 4",
163 "Bound 8",
164 "Bound 12",
165 "Bound 16",
166 NULL
167 };
513521ea 168 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 169 "No Emphasis",
170 "50/15 us",
171 "CCITT J17",
172 NULL
173 };
513521ea 174 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 175 "No CRC",
176 "16-bit CRC",
177 NULL
178 };
24c19a21
HV		 179 static const char * const mpeg_audio_dec_playback[] = {
180 "Auto",
181 "Stereo",
182 "Left",
183 "Right",
184 "Mono",
185 "Swapped Stereo",
186 NULL
187 };
513521ea 188 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 189 "MPEG-1",
190 "MPEG-2",
191 "MPEG-4 AVC",
192 NULL
193 };
513521ea 194 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 195 "1x1",
196 "4x3",
197 "16x9",
198 "2.21x1",
199 NULL
200 };
513521ea 201 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 202 "Variable Bitrate",
203 "Constant Bitrate",
204 NULL
205 };
513521ea 206 static const char * const mpeg_stream_type[] = {
0996517c
HV		 207 "MPEG-2 Program Stream",
208 "MPEG-2 Transport Stream",
209 "MPEG-1 System Stream",
210 "MPEG-2 DVD-compatible Stream",
211 "MPEG-1 VCD-compatible Stream",
212 "MPEG-2 SVCD-compatible Stream",
213 NULL
214 };
513521ea 215 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 216 "No VBI",
064f5096 217 "Private Packet, IVTV Format",
0996517c
HV		 218 NULL
219 };
513521ea 220 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 221 "Disabled",
222 "50 Hz",
223 "60 Hz",
d26a6635 224 "Auto",
0996517c
HV		 225 NULL
226 };
513521ea 227 static const char * const camera_exposure_auto[] = {
0996517c
HV		 228 "Auto Mode",
229 "Manual Mode",
230 "Shutter Priority Mode",
231 "Aperture Priority Mode",
232 NULL
233 };
cf072139
SN		 234 static const char * const camera_exposure_metering[] = {
235 "Average",
236 "Center Weighted",
237 "Spot",
fc39f46b 238 "Matrix",
cf072139
SN		 239 NULL
240 };
2272ab65
SN		 241 static const char * const camera_auto_focus_range[] = {
242 "Auto",
243 "Normal",
244 "Macro",
245 "Infinity",
246 NULL
247 };
513521ea 248 static const char * const colorfx[] = {
0996517c
HV		 249 "None",
250 "Black & White",
251 "Sepia",
252 "Negative",
253 "Emboss",
254 "Sketch",
064f5096
KD		 255 "Sky Blue",
256 "Grass Green",
257 "Skin Whiten",
0996517c 258 "Vivid",
6491d1ad
SN		 259 "Aqua",
260 "Art Freeze",
261 "Silhouette",
262 "Solarization",
263 "Antique",
264 "Set Cb/Cr",
0996517c
HV		 265 NULL
266 };
e40a0573
SN		 267 static const char * const auto_n_preset_white_balance[] = {
268 "Manual",
269 "Auto",
270 "Incandescent",
271 "Fluorescent",
272 "Fluorescent H",
273 "Horizon",
274 "Daylight",
275 "Flash",
276 "Cloudy",
277 "Shade",
278 NULL,
279 };
7f84ad8b
SN		 280 static const char * const camera_iso_sensitivity_auto[] = {
281 "Manual",
282 "Auto",
283 NULL
284 };
0bf6b7dc
SN		 285 static const char * const scene_mode[] = {
286 "None",
287 "Backlight",
288 "Beach/Snow",
289 "Candle Light",
290 "Dusk/Dawn",
291 "Fall Colors",
292 "Fireworks",
293 "Landscape",
294 "Night",
295 "Party/Indoor",
296 "Portrait",
297 "Sports",
298 "Sunset",
299 "Text",
300 NULL
301 };
aec330a8
AS		 302 static const char * const tune_emphasis[] = {
303 "None",
f769c260
HV		 304 "50 Microseconds",
305 "75 Microseconds",
0996517c
HV		 306 NULL,
307 };
064f5096
KD		 308 static const char * const header_mode[] = {
309 "Separate Buffer",
310 "Joined With 1st Frame",
311 NULL,
312 };
313 static const char * const multi_slice[] = {
314 "Single",
315 "Max Macroblocks",
316 "Max Bytes",
317 NULL,
318 };
319 static const char * const entropy_mode[] = {
320 "CAVLC",
321 "CABAC",
322 NULL,
323 };
324 static const char * const mpeg_h264_level[] = {
325 "1",
326 "1b",
327 "1.1",
328 "1.2",
329 "1.3",
330 "2",
331 "2.1",
332 "2.2",
333 "3",
334 "3.1",
335 "3.2",
336 "4",
337 "4.1",
338 "4.2",
339 "5",
340 "5.1",
341 NULL,
342 };
343 static const char * const h264_loop_filter[] = {
344 "Enabled",
345 "Disabled",
346 "Disabled at Slice Boundary",
347 NULL,
348 };
349 static const char * const h264_profile[] = {
350 "Baseline",
351 "Constrained Baseline",
352 "Main",
353 "Extended",
354 "High",
355 "High 10",
356 "High 422",
357 "High 444 Predictive",
358 "High 10 Intra",
359 "High 422 Intra",
360 "High 444 Intra",
361 "CAVLC 444 Intra",
362 "Scalable Baseline",
363 "Scalable High",
364 "Scalable High Intra",
15d6e91a 365 "Stereo High",
064f5096
KD		 366 "Multiview High",
367 NULL,
368 };
369 static const char * const vui_sar_idc[] = {
370 "Unspecified",
371 "1:1",
372 "12:11",
373 "10:11",
374 "16:11",
375 "40:33",
376 "24:11",
377 "20:11",
378 "32:11",
379 "80:33",
380 "18:11",
381 "15:11",
382 "64:33",
383 "160:99",
384 "4:3",
385 "3:2",
386 "2:1",
387 "Extended SAR",
388 NULL,
389 };
2e81dde9
AK		 390 static const char * const h264_fp_arrangement_type[] = {
391 "Checkerboard",
392 "Column",
393 "Row",
394 "Side by Side",
395 "Top Bottom",
396 "Temporal",
397 NULL,
398 };
399 static const char * const h264_fmo_map_type[] = {
400 "Interleaved Slices",
401 "Scattered Slices",
402 "Foreground with Leftover",
403 "Box Out",
404 "Raster Scan",
405 "Wipe Scan",
406 "Explicit",
407 NULL,
408 };
064f5096
KD		 409 static const char * const mpeg_mpeg4_level[] = {
410 "0",
411 "0b",
412 "1",
413 "2",
414 "3",
415 "3b",
416 "4",
417 "5",
418 NULL,
419 };
420 static const char * const mpeg4_profile[] = {
421 "Simple",
f769c260 422 "Advanced Simple",
064f5096
KD		 423 "Core",
424 "Simple Scalable",
39c1cb2b 425 "Advanced Coding Efficiency",
064f5096
KD		 426 NULL,
427 };
428
bc9028e1
AK		 429 static const char * const vpx_golden_frame_sel[] = {
430 "Use Previous Frame",
431 "Use Previous Specific Frame",
432 NULL,
433 };
5520b946
KW		 434 static const char * const vp8_profile[] = {
435 "0",
436 "1",
437 "2",
438 "3",
439 NULL,
440 };
2a75364d
KW		 441 static const char * const vp9_profile[] = {
442 "0",
443 "1",
444 "2",
445 "3",
446 NULL,
447 };
bc9028e1 448
0b159acd
SA		 449 static const char * const flash_led_mode[] = {
450 "Off",
451 "Flash",
452 "Torch",
453 NULL,
454 };
455 static const char * const flash_strobe_source[] = {
456 "Software",
457 "External",
458 NULL,
459 };
0996517c 460
c7361ae1
SN		 461 static const char * const jpeg_chroma_subsampling[] = {
462 "4:4:4",
463 "4:2:2",
464 "4:2:0",
465 "4:1:1",
466 "4:1:0",
467 "Gray",
468 NULL,
469 };
977ebec7
HV		 470 static const char * const dv_tx_mode[] = {
471 "DVI-D",
472 "HDMI",
473 NULL,
474 };
475 static const char * const dv_rgb_range[] = {
476 "Automatic",
f098268b
HV		 477 "RGB Limited Range (16-235)",
478 "RGB Full Range (0-255)",
977ebec7
HV		 479 NULL,
480 };
45cc29af
HV		 481 static const char * const dv_it_content_type[] = {
482 "Graphics",
483 "Photo",
484 "Cinema",
485 "Game",
486 "No IT Content",
487 NULL,
488 };
a77b4fc0
HV		 489 static const char * const detect_md_mode[] = {
490 "Disabled",
491 "Global",
492 "Threshold Grid",
493 "Region Grid",
494 NULL,
495 };
977ebec7 496
2c02837b
SM		 497 static const char * const hevc_profile[] = {
498 "Main",
499 "Main Still Picture",
500 "Main 10",
501 NULL,
502 };
503 static const char * const hevc_level[] = {
504 "1",
505 "2",
506 "2.1",
507 "3",
508 "3.1",
509 "4",
510 "4.1",
511 "5",
512 "5.1",
513 "5.2",
514 "6",
515 "6.1",
516 "6.2",
517 NULL,
518 };
519 static const char * const hevc_hierarchial_coding_type[] = {
520 "B",
521 "P",
522 NULL,
523 };
524 static const char * const hevc_refresh_type[] = {
525 "None",
526 "CRA",
527 "IDR",
528 NULL,
529 };
530 static const char * const hevc_size_of_length_field[] = {
531 "0",
532 "1",
533 "2",
534 "4",
535 NULL,
536 };
537 static const char * const hevc_tier[] = {
538 "Main",
539 "High",
540 NULL,
541 };
542 static const char * const hevc_loop_filter_mode[] = {
543 "Disabled",
544 "Enabled",
545 "Disabled at slice boundary",
546 "NULL",
547 };
c7361ae1 548
0996517c
HV		 549 switch (id) {
550 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
551 return mpeg_audio_sampling_freq;
552 case V4L2_CID_MPEG_AUDIO_ENCODING:
553 return mpeg_audio_encoding;
554 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
555 return mpeg_audio_l1_bitrate;
556 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
557 return mpeg_audio_l2_bitrate;
558 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
559 return mpeg_audio_l3_bitrate;
560 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
561 return mpeg_audio_ac3_bitrate;
562 case V4L2_CID_MPEG_AUDIO_MODE:
563 return mpeg_audio_mode;
564 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
565 return mpeg_audio_mode_extension;
566 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
567 return mpeg_audio_emphasis;
568 case V4L2_CID_MPEG_AUDIO_CRC:
569 return mpeg_audio_crc;
24c19a21
HV		 570 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
571 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
572 return mpeg_audio_dec_playback;
0996517c
HV		 573 case V4L2_CID_MPEG_VIDEO_ENCODING:
574 return mpeg_video_encoding;
575 case V4L2_CID_MPEG_VIDEO_ASPECT:
576 return mpeg_video_aspect;
577 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
578 return mpeg_video_bitrate_mode;
579 case V4L2_CID_MPEG_STREAM_TYPE:
580 return mpeg_stream_type;
581 case V4L2_CID_MPEG_STREAM_VBI_FMT:
582 return mpeg_stream_vbi_fmt;
583 case V4L2_CID_POWER_LINE_FREQUENCY:
584 return camera_power_line_frequency;
585 case V4L2_CID_EXPOSURE_AUTO:
586 return camera_exposure_auto;
cf072139
SN		 587 case V4L2_CID_EXPOSURE_METERING:
588 return camera_exposure_metering;
2272ab65
SN		 589 case V4L2_CID_AUTO_FOCUS_RANGE:
590 return camera_auto_focus_range;
0996517c
HV		 591 case V4L2_CID_COLORFX:
592 return colorfx;
e40a0573
SN		 593 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
594 return auto_n_preset_white_balance;
7f84ad8b
SN		 595 case V4L2_CID_ISO_SENSITIVITY_AUTO:
596 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 597 case V4L2_CID_SCENE_MODE:
598 return scene_mode;
0996517c 599 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 600 return tune_emphasis;
601 case V4L2_CID_TUNE_DEEMPHASIS:
602 return tune_emphasis;
0b159acd
SA		 603 case V4L2_CID_FLASH_LED_MODE:
604 return flash_led_mode;
605 case V4L2_CID_FLASH_STROBE_SOURCE:
606 return flash_strobe_source;
064f5096
KD		 607 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
608 return header_mode;
609 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
610 return multi_slice;
611 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
612 return entropy_mode;
613 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
614 return mpeg_h264_level;
615 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
616 return h264_loop_filter;
617 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
618 return h264_profile;
619 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
620 return vui_sar_idc;
2e81dde9
AK		 621 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
622 return h264_fp_arrangement_type;
623 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
624 return h264_fmo_map_type;
064f5096
KD		 625 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
626 return mpeg_mpeg4_level;
627 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
628 return mpeg4_profile;
bc9028e1
AK		 629 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
630 return vpx_golden_frame_sel;
5520b946
KW		 631 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
632 return vp8_profile;
2a75364d
KW		 633 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
634 return vp9_profile;
c7361ae1
SN		 635 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
636 return jpeg_chroma_subsampling;
977ebec7
HV		 637 case V4L2_CID_DV_TX_MODE:
638 return dv_tx_mode;
639 case V4L2_CID_DV_TX_RGB_RANGE:
640 case V4L2_CID_DV_RX_RGB_RANGE:
641 return dv_rgb_range;
45cc29af
HV		 642 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
643 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
644 return dv_it_content_type;
a77b4fc0
HV		 645 case V4L2_CID_DETECT_MD_MODE:
646 return detect_md_mode;
2c02837b
SM		 647 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
648 return hevc_profile;
649 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
650 return hevc_level;
651 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
652 return hevc_hierarchial_coding_type;
653 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
654 return hevc_refresh_type;
655 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
656 return hevc_size_of_length_field;
657 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
658 return hevc_tier;
659 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
660 return hevc_loop_filter_mode;
c7361ae1 661
0996517c
HV		 662 default:
663 return NULL;
664 }
665}
666EXPORT_SYMBOL(v4l2_ctrl_get_menu);
667
bc9028e1 668#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 669/*
670 * Returns NULL or an s64 type array containing the menu for given
671 * control ID. The total number of the menu items is returned in @len.
672 */
4eed9b33 673const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 674{
4eed9b33 675 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 676 1, 2, 4, 8,
677 };
678
4eed9b33 679 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 680 1, 2, 3,
681 };
682
d1e9b7c1 683 switch (id) {
bc9028e1
AK		 684 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
685 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
686 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
687 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 688 default:
689 *len = 0;
690 return NULL;
2028c71d 691 }
d1e9b7c1
SN		 692}
693EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
694
0996517c
HV		 695/* Return the control name. */
696const char *v4l2_ctrl_get_name(u32 id)
697{
698 switch (id) {
699 /* USER controls */
59253f29 700 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 701 case V4L2_CID_USER_CLASS: return "User Controls";
702 case V4L2_CID_BRIGHTNESS: return "Brightness";
703 case V4L2_CID_CONTRAST: return "Contrast";
704 case V4L2_CID_SATURATION: return "Saturation";
705 case V4L2_CID_HUE: return "Hue";
706 case V4L2_CID_AUDIO_VOLUME: return "Volume";
707 case V4L2_CID_AUDIO_BALANCE: return "Balance";
708 case V4L2_CID_AUDIO_BASS: return "Bass";
709 case V4L2_CID_AUDIO_TREBLE: return "Treble";
710 case V4L2_CID_AUDIO_MUTE: return "Mute";
711 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 712 case V4L2_CID_BLACK_LEVEL: return "Black Level";
713 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
714 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
715 case V4L2_CID_RED_BALANCE: return "Red Balance";
716 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
717 case V4L2_CID_GAMMA: return "Gamma";
718 case V4L2_CID_EXPOSURE: return "Exposure";
719 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
720 case V4L2_CID_GAIN: return "Gain";
721 case V4L2_CID_HFLIP: return "Horizontal Flip";
722 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 723 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
724 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
725 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
726 case V4L2_CID_SHARPNESS: return "Sharpness";
727 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
728 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 729 case V4L2_CID_COLOR_KILLER: return "Color Killer";
730 case V4L2_CID_COLORFX: return "Color Effects";
731 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
732 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
733 case V4L2_CID_ROTATE: return "Rotate";
734 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 735 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 736 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
737 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 738 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
739 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 740 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 741 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 742
bc9028e1
AK		 743 /* Codec controls */
744 /* The MPEG controls are applicable to all codec controls
745 * and the 'MPEG' part of the define is historical */
6c8d6111 746 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 747 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 748 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
749 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
750 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
751 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
752 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 753 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
754 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
755 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 756 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 757 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
758 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
759 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
760 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
761 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 762 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 763 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
764 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
765 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
766 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
767 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 768 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
769 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 770 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
771 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
772 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
773 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
774 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
775 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
776 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
777 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
778 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 779 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 780 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 781 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 782 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
783 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 784 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 785 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
786 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
787 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 788 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 789 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 790 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
791 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 792 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
793 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
794 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 795 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
796 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 797 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
798 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
799 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
800 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 801 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
802 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 803 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
804 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
805 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
806 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
807 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
808 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
809 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
810 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
811 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 812 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
813 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
814 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
815 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
816 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
817 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
818 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
819 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
820 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
821 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
822 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
823 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
824 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
825 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
826 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
827 return "H264 Set QP Value for HC Layers";
064f5096 828 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 829 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
830 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 831 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
832 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
833 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
834 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
835 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 836 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
837 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
838 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 839 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 840 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
841 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 842 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 843 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
844 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 845 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
cedc1210 846 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
c27bb30e
PK		 847 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
848 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices";
0996517c 849
bc9028e1
AK		 850 /* VPX controls */
851 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
852 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
853 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
854 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
855 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
856 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
857 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 858 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
859 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
860 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
861 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
5520b946 862 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
2a75364d 863 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
bc9028e1 864
2c02837b
SM		 865 /* HEVC controls */
866 case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value";
867 case V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP: return "HEVC P-Frame QP Value";
868 case V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP: return "HEVC B-Frame QP Value";
869 case V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP: return "HEVC Minimum QP Value";
870 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP: return "HEVC Maximum QP Value";
871 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE: return "HEVC Profile";
872 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL: return "HEVC Level";
873 case V4L2_CID_MPEG_VIDEO_HEVC_TIER: return "HEVC Tier";
874 case V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION: return "HEVC Frame Rate Resolution";
875 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH: return "HEVC Maximum Coding Unit Depth";
876 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE: return "HEVC Refresh Type";
877 case V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED: return "HEVC Constant Intra Prediction";
878 case V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU: return "HEVC Lossless Encoding";
879 case V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT: return "HEVC Wavefront";
880 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE: return "HEVC Loop Filter";
881 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP: return "HEVC QP Values";
882 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE: return "HEVC Hierarchical Coding Type";
883 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER: return "HEVC Hierarchical Coding Layer";
884 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP: return "HEVC Hierarchical Layer 0 QP";
885 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP: return "HEVC Hierarchical Layer 1 QP";
886 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP: return "HEVC Hierarchical Layer 2 QP";
887 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP: return "HEVC Hierarchical Layer 3 QP";
888 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP: return "HEVC Hierarchical Layer 4 QP";
889 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP: return "HEVC Hierarchical Layer 5 QP";
890 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP: return "HEVC Hierarchical Layer 6 QP";
891 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR: return "HEVC Hierarchical Lay 0 BitRate";
892 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR: return "HEVC Hierarchical Lay 1 BitRate";
893 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR: return "HEVC Hierarchical Lay 2 BitRate";
894 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR: return "HEVC Hierarchical Lay 3 BitRate";
895 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR: return "HEVC Hierarchical Lay 4 BitRate";
896 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR: return "HEVC Hierarchical Lay 5 BitRate";
897 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR: return "HEVC Hierarchical Lay 6 BitRate";
898 case V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB: return "HEVC General PB";
899 case V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID: return "HEVC Temporal ID";
900 case V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING: return "HEVC Strong Intra Smoothing";
901 case V4L2_CID_MPEG_VIDEO_HEVC_INTRA_PU_SPLIT: return "HEVC Intra PU Split";
902 case V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION: return "HEVC TMV Prediction";
903 case V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1: return "HEVC Max Num of Candidate MVs";
904 case V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE: return "HEVC ENC Without Startcode";
905 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD: return "HEVC Num of I-Frame b/w 2 IDR";
906 case V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2: return "HEVC Loop Filter Beta Offset";
907 case V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2: return "HEVC Loop Filter TC Offset";
908 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD: return "HEVC Size of Length Field";
909 case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES: return "Reference Frames for a P-Frame";
910 case V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR: return "Prepend SPS and PPS to IDR";
911
0996517c 912 /* CAMERA controls */
59253f29 913 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 914 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
915 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
916 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
917 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
918 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
919 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
920 case V4L2_CID_PAN_RESET: return "Pan, Reset";
921 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
922 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
923 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
924 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
925 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 926 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 927 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
928 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
929 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
930 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 931 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
932 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 933 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 934 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 935 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 936 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 937 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
938 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 939 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 940 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 941 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 942 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
943 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
944 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
945 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 946 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
947 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 948
59253f29
HV		 949 /* FM Radio Modulator controls */
950 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 951 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
952 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
953 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
954 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
955 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
956 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 957 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
958 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
959 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
960 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
961 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
962 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
963 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
964 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
965 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 966 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
967 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
968 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 969 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 970 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
971 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
972 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
973 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
974 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
975 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
976 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 977 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 978 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
979 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
980
0b159acd 981 /* Flash controls */
59253f29 982 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 983 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
984 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
985 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 986 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 987 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
988 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
989 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
990 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
991 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
992 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 993 case V4L2_CID_FLASH_FAULT: return "Faults";
994 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 995 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 996
c7361ae1 997 /* JPEG encoder controls */
59253f29 998 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 999 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
1000 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
1001 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
1002 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
1003 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
1004
8c9d236e 1005 /* Image source controls */
59253f29 1006 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 1007 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
1008 case V4L2_CID_VBLANK: return "Vertical Blanking";
1009 case V4L2_CID_HBLANK: return "Horizontal Blanking";
1010 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 1011 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
1012 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
1013 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
1014 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 1015
c643ee13 1016 /* Image processing controls */
59253f29 1017 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 1018 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
1019 case V4L2_CID_LINK_FREQ: return "Link Frequency";
1020 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 1021 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
446e4125 1022 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
e72cb0e7 1023 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
c643ee13 1024
977ebec7 1025 /* DV controls */
59253f29 1026 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 1027 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
1028 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
1029 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
1030 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
1031 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
1032 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
45cc29af 1033 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
977ebec7
HV		 1034 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
1035 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
45cc29af 1036 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
977ebec7 1037
aec330a8
AS		 1038 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
1039 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
1040 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad 1041 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
41018cb8 1042 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
80807fad
AP		 1043 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
1044 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
1045 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
1046 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
1047 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
1048 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 1049 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
1050 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 1051 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 1052 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
1053 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
1054 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
1055 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
1056 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
1057 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 1058
1059 /* Detection controls */
1060 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
1061 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
1062 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
1063 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
1064 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
1065 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 1066 default:
1067 return NULL;
1068 }
1069}
1070EXPORT_SYMBOL(v4l2_ctrl_get_name);
1071
1072void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 1073 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 1074{
1075 *name = v4l2_ctrl_get_name(id);
1076 *flags = 0;
1077
1078 switch (id) {
1079 case V4L2_CID_AUDIO_MUTE:
1080 case V4L2_CID_AUDIO_LOUDNESS:
1081 case V4L2_CID_AUTO_WHITE_BALANCE:
1082 case V4L2_CID_AUTOGAIN:
1083 case V4L2_CID_HFLIP:
1084 case V4L2_CID_VFLIP:
1085 case V4L2_CID_HUE_AUTO:
1086 case V4L2_CID_CHROMA_AGC:
1087 case V4L2_CID_COLOR_KILLER:
a2f8b84f 1088 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 1089 case V4L2_CID_MPEG_AUDIO_MUTE:
1090 case V4L2_CID_MPEG_VIDEO_MUTE:
1091 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
1092 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
1093 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
1094 case V4L2_CID_FOCUS_AUTO:
1095 case V4L2_CID_PRIVACY:
1096 case V4L2_CID_AUDIO_LIMITER_ENABLED:
1097 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
1098 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 1099 case V4L2_CID_ILLUMINATORS_1:
1100 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 1101 case V4L2_CID_FLASH_STROBE_STATUS:
1102 case V4L2_CID_FLASH_CHARGE:
1103 case V4L2_CID_FLASH_READY:
064f5096
KD		 1104 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
1105 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
1106 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
1107 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
1108 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
1109 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
1110 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 1111 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 1112 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 1113 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 1114 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 1115 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
1116 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
1117 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 1118 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 1119 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 1120 case V4L2_CID_RDS_TX_MONO_STEREO:
1121 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
1122 case V4L2_CID_RDS_TX_COMPRESSED:
1123 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
1124 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
1125 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
1126 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
1127 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 1128 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1129 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1130 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 1131 *type = V4L2_CTRL_TYPE_BOOLEAN;
1132 *min = 0;
1133 *max = *step = 1;
1134 break;
c0e681f5
HV		 1135 case V4L2_CID_ROTATE:
1136 *type = V4L2_CTRL_TYPE_INTEGER;
1137 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1138 break;
bf0bedd3
AG		 1139 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
1140 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1141 *type = V4L2_CTRL_TYPE_INTEGER;
1142 break;
cedc1210 1143 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
0996517c
HV		 1144 case V4L2_CID_PAN_RESET:
1145 case V4L2_CID_TILT_RESET:
0b159acd
SA		 1146 case V4L2_CID_FLASH_STROBE:
1147 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 1148 case V4L2_CID_AUTO_FOCUS_START:
1149 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 1150 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RR		 1151 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1152 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1153 *min = *max = *step = *def = 0;
1154 break;
1155 case V4L2_CID_POWER_LINE_FREQUENCY:
1156 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1157 case V4L2_CID_MPEG_AUDIO_ENCODING:
1158 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1159 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1160 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1161 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1162 case V4L2_CID_MPEG_AUDIO_MODE:
1163 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1164 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1165 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1166 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1167 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1168 case V4L2_CID_MPEG_VIDEO_ENCODING:
1169 case V4L2_CID_MPEG_VIDEO_ASPECT:
1170 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1171 case V4L2_CID_MPEG_STREAM_TYPE:
1172 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1173 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1174 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1175 case V4L2_CID_COLORFX:
e40a0573 1176 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1177 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1178 case V4L2_CID_FLASH_LED_MODE:
1179 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1180 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1181 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1182 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1183 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1184 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1185 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1186 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1187 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1188 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1189 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1190 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1191 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1192 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1193 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1194 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1195 case V4L2_CID_DV_TX_MODE:
1196 case V4L2_CID_DV_TX_RGB_RANGE:
45cc29af 1197 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
977ebec7 1198 case V4L2_CID_DV_RX_RGB_RANGE:
45cc29af 1199 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
5ebef0fb 1200 case V4L2_CID_TEST_PATTERN:
446e4125 1201 case V4L2_CID_DEINTERLACING_MODE:
aec330a8 1202 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1203 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
5520b946 1204 case V4L2_CID_MPEG_VIDEO_VP8_PROFILE:
2a75364d 1205 case V4L2_CID_MPEG_VIDEO_VP9_PROFILE:
a77b4fc0 1206 case V4L2_CID_DETECT_MD_MODE:
2c02837b
SM		 1207 case V4L2_CID_MPEG_VIDEO_HEVC_PROFILE:
1208 case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
1209 case V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE:
1210 case V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE:
1211 case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:
1212 case V4L2_CID_MPEG_VIDEO_HEVC_TIER:
1213 case V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE:
0996517c
HV		 1214 *type = V4L2_CTRL_TYPE_MENU;
1215 break;
c643ee13
SA		 1216 case V4L2_CID_LINK_FREQ:
1217 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1218 break;
0996517c
HV		 1219 case V4L2_CID_RDS_TX_PS_NAME:
1220 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1221 case V4L2_CID_RDS_RX_PS_NAME:
1222 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1223 *type = V4L2_CTRL_TYPE_STRING;
1224 break;
7f84ad8b 1225 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1226 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1227 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1228 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1229 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1230 break;
0996517c
HV		 1231 case V4L2_CID_USER_CLASS:
1232 case V4L2_CID_CAMERA_CLASS:
1233 case V4L2_CID_MPEG_CLASS:
1234 case V4L2_CID_FM_TX_CLASS:
0b159acd 1235 case V4L2_CID_FLASH_CLASS:
c7361ae1 1236 case V4L2_CID_JPEG_CLASS:
8c9d236e 1237 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1238 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1239 case V4L2_CID_DV_CLASS:
aec330a8 1240 case V4L2_CID_FM_RX_CLASS:
80807fad 1241 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1242 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1243 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1244 /* You can neither read not write these */
1245 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1246 *min = *max = *step = *def = 0;
1247 break;
1248 case V4L2_CID_BG_COLOR:
1249 *type = V4L2_CTRL_TYPE_INTEGER;
1250 *step = 1;
1251 *min = 0;
1252 /* Max is calculated as RGB888 that is 2^24 */
1253 *max = 0xFFFFFF;
1254 break;
0b159acd 1255 case V4L2_CID_FLASH_FAULT:
c7361ae1 1256 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1257 case V4L2_CID_3A_LOCK:
2272ab65 1258 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1259 case V4L2_CID_DV_TX_HOTPLUG:
1260 case V4L2_CID_DV_TX_RXSENSE:
1261 case V4L2_CID_DV_TX_EDID_PRESENT:
1262 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1263 *type = V4L2_CTRL_TYPE_BITMASK;
1264 break;
064f5096
KD		 1265 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1266 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1267 *type = V4L2_CTRL_TYPE_INTEGER;
1268 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1269 break;
24c19a21 1270 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1271 *type = V4L2_CTRL_TYPE_INTEGER64;
1272 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1273 *min = *def = 0;
1274 *max = 0x1ffffffffLL;
1275 *step = 1;
1276 break;
1277 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1278 *type = V4L2_CTRL_TYPE_INTEGER64;
1279 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1280 *min = *def = 0;
1281 *max = 0x7fffffffffffffffLL;
1282 *step = 1;
1283 break;
c643ee13 1284 case V4L2_CID_PIXEL_RATE:
24c19a21 1285 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1286 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1287 break;
a77b4fc0
HV		 1288 case V4L2_CID_DETECT_MD_REGION_GRID:
1289 *type = V4L2_CTRL_TYPE_U8;
1290 break;
1291 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1292 *type = V4L2_CTRL_TYPE_U16;
1293 break;
811c5081
HV		 1294 case V4L2_CID_RDS_TX_ALT_FREQS:
1295 *type = V4L2_CTRL_TYPE_U32;
1296 break;
c27bb30e
PK		 1297 case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
1298 *type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
1299 break;
1300 case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
1301 *type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
1302 break;
0996517c
HV		 1303 default:
1304 *type = V4L2_CTRL_TYPE_INTEGER;
1305 break;
1306 }
1307 switch (id) {
1308 case V4L2_CID_MPEG_AUDIO_ENCODING:
1309 case V4L2_CID_MPEG_AUDIO_MODE:
1310 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1311 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1312 case V4L2_CID_MPEG_STREAM_TYPE:
1313 *flags |= V4L2_CTRL_FLAG_UPDATE;
1314 break;
1315 case V4L2_CID_AUDIO_VOLUME:
1316 case V4L2_CID_AUDIO_BALANCE:
1317 case V4L2_CID_AUDIO_BASS:
1318 case V4L2_CID_AUDIO_TREBLE:
1319 case V4L2_CID_BRIGHTNESS:
1320 case V4L2_CID_CONTRAST:
1321 case V4L2_CID_SATURATION:
1322 case V4L2_CID_HUE:
1323 case V4L2_CID_RED_BALANCE:
1324 case V4L2_CID_BLUE_BALANCE:
1325 case V4L2_CID_GAMMA:
1326 case V4L2_CID_SHARPNESS:
1327 case V4L2_CID_CHROMA_GAIN:
1328 case V4L2_CID_RDS_TX_DEVIATION:
1329 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1330 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1331 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1332 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1333 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1334 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1335 case V4L2_CID_PILOT_TONE_DEVIATION:
1336 case V4L2_CID_PILOT_TONE_FREQUENCY:
1337 case V4L2_CID_TUNE_POWER_LEVEL:
1338 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
41018cb8 1339 case V4L2_CID_RF_TUNER_RF_GAIN:
80807fad
AP		 1340 case V4L2_CID_RF_TUNER_LNA_GAIN:
1341 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1342 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1343 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1344 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1345 *flags |= V4L2_CTRL_FLAG_SLIDER;
1346 break;
1347 case V4L2_CID_PAN_RELATIVE:
1348 case V4L2_CID_TILT_RELATIVE:
1349 case V4L2_CID_FOCUS_RELATIVE:
1350 case V4L2_CID_IRIS_RELATIVE:
1351 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RR		 1352 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1353 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1354 break;
0b159acd 1355 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1356 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1357 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1358 case V4L2_CID_DV_TX_HOTPLUG:
1359 case V4L2_CID_DV_TX_RXSENSE:
1360 case V4L2_CID_DV_TX_EDID_PRESENT:
1361 case V4L2_CID_DV_RX_POWER_PRESENT:
45cc29af 1362 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
9570a148
HV		 1363 case V4L2_CID_RDS_RX_PTY:
1364 case V4L2_CID_RDS_RX_PS_NAME:
1365 case V4L2_CID_RDS_RX_RADIO_TEXT:
1366 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1367 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1368 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1369 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1370 break;
9aa4357e
AP		 1371 case V4L2_CID_RF_TUNER_PLL_LOCK:
1372 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1373 break;
0996517c
HV		 1374 }
1375}
1376EXPORT_SYMBOL(v4l2_ctrl_fill);
1377
9cac9d2f
RR		 1378static u32 user_flags(const struct v4l2_ctrl *ctrl)
1379{
1380 u32 flags = ctrl->flags;
1381
1382 if (ctrl->is_ptr)
1383 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
1384
1385 return flags;
1386}
1387
6e239399
HV		 1388static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1389{
1390 memset(ev->reserved, 0, sizeof(ev->reserved));
1391 ev->type = V4L2_EVENT_CTRL;
1392 ev->id = ctrl->id;
1393 ev->u.ctrl.changes = changes;
1394 ev->u.ctrl.type = ctrl->type;
9cac9d2f 1395 ev->u.ctrl.flags = user_flags(ctrl);
d9a25471 1396 if (ctrl->is_ptr)
6e239399
HV		 1397 ev->u.ctrl.value64 = 0;
1398 else
2a9ec373 1399 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1400 ev->u.ctrl.minimum = ctrl->minimum;
1401 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1402 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1403 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1404 ev->u.ctrl.step = 1;
1405 else
1406 ev->u.ctrl.step = ctrl->step;
1407 ev->u.ctrl.default_value = ctrl->default_value;
1408}
1409
1410static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1411{
1412 struct v4l2_event ev;
77068d36 1413 struct v4l2_subscribed_event *sev;
6e239399 1414
77068d36 1415 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1416 return;
6e239399
HV		 1417 fill_event(&ev, ctrl, changes);
1418
77068d36 1419 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1420 if (sev->fh != fh ||
1421 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1422 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1423}
1424
998e7659 1425static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1426 union v4l2_ctrl_ptr ptr1,
1427 union v4l2_ctrl_ptr ptr2)
1428{
1429 switch (ctrl->type) {
1430 case V4L2_CTRL_TYPE_BUTTON:
1431 return false;
1432 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1433 idx *= ctrl->elem_size;
0176077a 1434 /* strings are always 0-terminated */
265c7f8a 1435 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1436 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1437 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1438 case V4L2_CTRL_TYPE_U8:
1439 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1440 case V4L2_CTRL_TYPE_U16:
1441 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1442 case V4L2_CTRL_TYPE_U32:
1443 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1444 default:
265c7f8a
HV		 1445 if (ctrl->is_int)
1446 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1447 idx *= ctrl->elem_size;
1448 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1449 }
1450}
1451
998e7659 1452static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1453 union v4l2_ctrl_ptr ptr)
1454{
1455 switch (ctrl->type) {
1456 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1457 idx *= ctrl->elem_size;
1458 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1459 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1460 break;
1461 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1462 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1463 break;
1464 case V4L2_CTRL_TYPE_INTEGER:
1465 case V4L2_CTRL_TYPE_INTEGER_MENU:
1466 case V4L2_CTRL_TYPE_MENU:
1467 case V4L2_CTRL_TYPE_BITMASK:
1468 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1469 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1470 break;
dda4a4d5
HV		 1471 case V4L2_CTRL_TYPE_U8:
1472 ptr.p_u8[idx] = ctrl->default_value;
1473 break;
1474 case V4L2_CTRL_TYPE_U16:
1475 ptr.p_u16[idx] = ctrl->default_value;
1476 break;
811c5081
HV		 1477 case V4L2_CTRL_TYPE_U32:
1478 ptr.p_u32[idx] = ctrl->default_value;
1479 break;
0176077a 1480 default:
302ab7ce
HV		 1481 idx *= ctrl->elem_size;
1482 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1483 break;
1484 }
1485}
1486
1487static void std_log(const struct v4l2_ctrl *ctrl)
1488{
1489 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1490
998e7659
HV		 1491 if (ctrl->is_array) {
1492 unsigned i;
1493
1494 for (i = 0; i < ctrl->nr_of_dims; i++)
1495 pr_cont("[%u]", ctrl->dims[i]);
1496 pr_cont(" ");
1497 }
1498
0176077a
HV		 1499 switch (ctrl->type) {
1500 case V4L2_CTRL_TYPE_INTEGER:
1501 pr_cont("%d", *ptr.p_s32);
1502 break;
1503 case V4L2_CTRL_TYPE_BOOLEAN:
1504 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1505 break;
1506 case V4L2_CTRL_TYPE_MENU:
1507 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1508 break;
1509 case V4L2_CTRL_TYPE_INTEGER_MENU:
1510 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1511 break;
1512 case V4L2_CTRL_TYPE_BITMASK:
1513 pr_cont("0x%08x", *ptr.p_s32);
1514 break;
1515 case V4L2_CTRL_TYPE_INTEGER64:
1516 pr_cont("%lld", *ptr.p_s64);
1517 break;
1518 case V4L2_CTRL_TYPE_STRING:
1519 pr_cont("%s", ptr.p_char);
1520 break;
dda4a4d5
HV		 1521 case V4L2_CTRL_TYPE_U8:
1522 pr_cont("%u", (unsigned)*ptr.p_u8);
1523 break;
1524 case V4L2_CTRL_TYPE_U16:
1525 pr_cont("%u", (unsigned)*ptr.p_u16);
1526 break;
811c5081
HV		 1527 case V4L2_CTRL_TYPE_U32:
1528 pr_cont("%u", (unsigned)*ptr.p_u32);
1529 break;
0176077a
HV		 1530 default:
1531 pr_cont("unknown type %d", ctrl->type);
1532 break;
1533 }
1534}
1535
958c7c7e
HV		 1536/*
1537 * Round towards the closest legal value. Be careful when we are
1538 * close to the maximum range of the control type to prevent
1539 * wrap-arounds.
1540 */
0176077a
HV		 1541#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1542({ \
1543 offset_type offset; \
958c7c7e 1544 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1545 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1546 val = (ctrl)->maximum; \
1547 else \
9c9cb1fa 1548 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1549 val = clamp_t(typeof(val), val, \
1550 (ctrl)->minimum, (ctrl)->maximum); \
1551 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1552 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1553 val = (ctrl)->minimum + offset; \
1554 0; \
1555})
1556
1557/* Validate a new control */
998e7659 1558static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1559 union v4l2_ctrl_ptr ptr)
1560{
c27bb30e 1561 struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
0176077a 1562 size_t len;
0d5e8c43
HV		 1563 u64 offset;
1564 s64 val;
0176077a
HV		 1565
1566 switch (ctrl->type) {
1567 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1568 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1569 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1570 /*
1571 * We can't use the ROUND_TO_RANGE define here due to
1572 * the u64 divide that needs special care.
1573 */
1574 val = ptr.p_s64[idx];
9c9cb1fa 1575 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1576 val = ctrl->maximum;
1577 else
9c9cb1fa 1578 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1579 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1580 offset = val - ctrl->minimum;
1581 do_div(offset, ctrl->step);
1582 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1583 return 0;
dda4a4d5
HV		 1584 case V4L2_CTRL_TYPE_U8:
1585 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1586 case V4L2_CTRL_TYPE_U16:
1587 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1588 case V4L2_CTRL_TYPE_U32:
1589 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1590
1591 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1592 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1593 return 0;
1594
1595 case V4L2_CTRL_TYPE_MENU:
1596 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1597 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1598 return -ERANGE;
265c7f8a 1599 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1600 return -EINVAL;
1601 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1602 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1603 return -EINVAL;
1604 return 0;
1605
1606 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1607 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1608 return 0;
1609
1610 case V4L2_CTRL_TYPE_BUTTON:
1611 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1612 ptr.p_s32[idx] = 0;
0176077a
HV		 1613 return 0;
1614
1615 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1616 idx *= ctrl->elem_size;
1617 len = strlen(ptr.p_char + idx);
0176077a
HV		 1618 if (len < ctrl->minimum)
1619 return -ERANGE;
0d5e8c43 1620 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1621 return -ERANGE;
1622 return 0;
1623
c27bb30e
PK		 1624 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
1625 p_mpeg2_slice_params = ptr.p;
1626
1627 switch (p_mpeg2_slice_params->sequence.chroma_format) {
1628 case 1: /* 4:2:0 */
1629 case 2: /* 4:2:2 */
1630 case 3: /* 4:4:4 */
1631 break;
1632 default:
1633 return -EINVAL;
1634 }
1635
1636 switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
1637 case 0: /* 8 bits */
1638 case 1: /* 9 bits */
1639 case 11: /* 11 bits */
1640 break;
1641 default:
1642 return -EINVAL;
1643 }
1644
1645 switch (p_mpeg2_slice_params->picture.picture_structure) {
1646 case 1: /* interlaced top field */
1647 case 2: /* interlaced bottom field */
1648 case 3: /* progressive */
1649 break;
1650 default:
1651 return -EINVAL;
1652 }
1653
1654 switch (p_mpeg2_slice_params->picture.picture_coding_type) {
1655 case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
1656 case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
1657 case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
1658 break;
1659 default:
1660 return -EINVAL;
1661 }
1662
1663 if (p_mpeg2_slice_params->backward_ref_index >= VIDEO_MAX_FRAME ||
1664 p_mpeg2_slice_params->forward_ref_index >= VIDEO_MAX_FRAME)
1665 return -EINVAL;
1666
df18bfd3
AB		 1667 if (p_mpeg2_slice_params->pad ||
1668 p_mpeg2_slice_params->picture.pad ||
1669 p_mpeg2_slice_params->sequence.pad)
1670 return -EINVAL;
1671
c27bb30e
PK		 1672 return 0;
1673
1674 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
1675 return 0;
1676
0176077a
HV		 1677 default:
1678 return -EINVAL;
1679 }
1680}
1681
1682static const struct v4l2_ctrl_type_ops std_type_ops = {
1683 .equal = std_equal,
1684 .init = std_init,
1685 .log = std_log,
1686 .validate = std_validate,
1687};
1688
000e4f9a
HV		 1689/* Helper function: copy the given control value back to the caller */
1690static int ptr_to_user(struct v4l2_ext_control *c,
1691 struct v4l2_ctrl *ctrl,
1692 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1693{
1694 u32 len;
1695
d9a25471 1696 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1697 return copy_to_user(c->ptr, ptr.p, c->size) ?
1698 -EFAULT : 0;
d9a25471 1699
0996517c
HV		 1700 switch (ctrl->type) {
1701 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1702 len = strlen(ptr.p_char);
0996517c 1703 if (c->size < len + 1) {
c336f75e 1704 c->size = ctrl->elem_size;
0996517c
HV		 1705 return -ENOSPC;
1706 }
000e4f9a 1707 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1708 -EFAULT : 0;
0996517c 1709 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1710 c->value64 = *ptr.p_s64;
0996517c
HV		 1711 break;
1712 default:
000e4f9a 1713 c->value = *ptr.p_s32;
0996517c
HV		 1714 break;
1715 }
1716 return 0;
1717}
1718
000e4f9a
HV		 1719/* Helper function: copy the current control value back to the caller */
1720static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1721 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1722{
1723 return ptr_to_user(c, ctrl, ctrl->p_cur);
1724}
1725
1726/* Helper function: copy the new control value back to the caller */
1727static int new_to_user(struct v4l2_ext_control *c,
1728 struct v4l2_ctrl *ctrl)
1729{
1730 return ptr_to_user(c, ctrl, ctrl->p_new);
1731}
1732
6fa6f831
HV		 1733/* Helper function: copy the request value back to the caller */
1734static int req_to_user(struct v4l2_ext_control *c,
1735 struct v4l2_ctrl_ref *ref)
1736{
1737 return ptr_to_user(c, ref->ctrl, ref->p_req);
1738}
1739
953eae5d
RR		 1740/* Helper function: copy the initial control value back to the caller */
1741static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1742{
1743 int idx;
1744
1745 for (idx = 0; idx < ctrl->elems; idx++)
1746 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1747
1748 return ptr_to_user(c, ctrl, ctrl->p_new);
1749}
1750
000e4f9a
HV		 1751/* Helper function: copy the caller-provider value to the given control value */
1752static int user_to_ptr(struct v4l2_ext_control *c,
1753 struct v4l2_ctrl *ctrl,
1754 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1755{
1756 int ret;
1757 u32 size;
1758
2a863793 1759 ctrl->is_new = 1;
302ab7ce
HV		 1760 if (ctrl->is_ptr && !ctrl->is_string) {
1761 unsigned idx;
1762
40265bbe 1763 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1764 if (ret || !ctrl->is_array)
1765 return ret;
1766 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1767 ctrl->type_ops->init(ctrl, idx, ptr);
1768 return 0;
1769 }
d9a25471 1770
0996517c
HV		 1771 switch (ctrl->type) {
1772 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1773 *ptr.p_s64 = c->value64;
0996517c
HV		 1774 break;
1775 case V4L2_CTRL_TYPE_STRING:
1776 size = c->size;
1777 if (size == 0)
1778 return -ERANGE;
1779 if (size > ctrl->maximum + 1)
1780 size = ctrl->maximum + 1;
40265bbe 1781 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1782 if (!ret) {
000e4f9a 1783 char last = ptr.p_char[size - 1];
0996517c 1784
000e4f9a 1785 ptr.p_char[size - 1] = 0;
0996517c
HV		 1786 /* If the string was longer than ctrl->maximum,
1787 then return an error. */
000e4f9a 1788 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1789 return -ERANGE;
1790 }
40265bbe 1791 return ret;
0996517c 1792 default:
000e4f9a 1793 *ptr.p_s32 = c->value;
0996517c
HV		 1794 break;
1795 }
1796 return 0;
1797}
1798
000e4f9a
HV		 1799/* Helper function: copy the caller-provider value as the new control value */
1800static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1801 struct v4l2_ctrl *ctrl)
1802{
000e4f9a
HV		 1803 return user_to_ptr(c, ctrl, ctrl->p_new);
1804}
d9a25471 1805
000e4f9a
HV		 1806/* Copy the one value to another. */
1807static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1808 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1809{
1810 if (ctrl == NULL)
1811 return;
302ab7ce 1812 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1813}
1814
1815/* Copy the new value to the current value. */
2ccbe779 1816static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1817{
000e4f9a 1818 bool changed;
6e239399 1819
0996517c
HV		 1820 if (ctrl == NULL)
1821 return;
9ea1b7a4
HV		 1822
1823 /* has_changed is set by cluster_changed */
1824 changed = ctrl->has_changed;
1825 if (changed)
1826 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1827
2ccbe779
SN		 1828 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1829 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1830 ctrl->flags &=
1831 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1832 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1833 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1834 if (ctrl->cluster[0]->has_volatiles)
1835 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1836 }
1249a3a8 1837 fh = NULL;
72d877ca 1838 }
2ccbe779 1839 if (changed || ch_flags) {
639884a6
HV		 1840 /* If a control was changed that was not one of the controls
1841 modified by the application, then send the event to all. */
1842 if (!ctrl->is_new)
1843 fh = NULL;
6e239399 1844 send_event(fh, ctrl,
2ccbe779 1845 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1846 if (ctrl->call_notify && changed && ctrl->handler->notify)
1847 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1848 }
0996517c
HV		 1849}
1850
1851/* Copy the current value to the new value */
1852static void cur_to_new(struct v4l2_ctrl *ctrl)
1853{
1854 if (ctrl == NULL)
1855 return;
000e4f9a 1856 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1857}
1858
6fa6f831
HV		 1859/* Copy the new value to the request value */
1860static void new_to_req(struct v4l2_ctrl_ref *ref)
1861{
1862 if (!ref)
1863 return;
1864 ptr_to_ptr(ref->ctrl, ref->ctrl->p_new, ref->p_req);
1865 ref->req = ref;
1866}
1867
1868/* Copy the request value to the new value */
1869static void req_to_new(struct v4l2_ctrl_ref *ref)
1870{
1871 if (!ref)
1872 return;
1873 if (ref->req)
1874 ptr_to_ptr(ref->ctrl, ref->req->p_req, ref->ctrl->p_new);
1875 else
1876 ptr_to_ptr(ref->ctrl, ref->ctrl->p_cur, ref->ctrl->p_new);
1877}
1878
0996517c
HV		 1879/* Return non-zero if one or more of the controls in the cluster has a new
1880 value that differs from the current value. */
1881static int cluster_changed(struct v4l2_ctrl *master)
1882{
9ea1b7a4 1883 bool changed = false;
302ab7ce 1884 unsigned idx;
0996517c
HV		 1885 int i;
1886
9ea1b7a4 1887 for (i = 0; i < master->ncontrols; i++) {
0996517c 1888 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1889 bool ctrl_changed = false;
0996517c
HV		 1890
1891 if (ctrl == NULL)
1892 continue;
45f014c5
RR		 1893
1894 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1895 changed = ctrl_changed = true;
1896
b08d8d26
RR		 1897 /*
1898 * Set has_changed to false to avoid generating
1899 * the event V4L2_EVENT_CTRL_CH_VALUE
1900 */
1901 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1902 ctrl->has_changed = false;
1903 continue;
1904 }
1905
302ab7ce
HV		 1906 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1907 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1908 ctrl->p_cur, ctrl->p_new);
302ab7ce 1909 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1910 changed |= ctrl->has_changed;
0996517c 1911 }
9ea1b7a4 1912 return changed;
0996517c
HV		 1913}
1914
2ccbe779
SN		 1915/* Control range checking */
1916static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1917 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1918{
1919 switch (type) {
1920 case V4L2_CTRL_TYPE_BOOLEAN:
1921 if (step != 1 || max > 1 || min < 0)
1922 return -ERANGE;
1923 /* fall through */
dda4a4d5
HV		 1924 case V4L2_CTRL_TYPE_U8:
1925 case V4L2_CTRL_TYPE_U16:
811c5081 1926 case V4L2_CTRL_TYPE_U32:
2ccbe779 1927 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1928 case V4L2_CTRL_TYPE_INTEGER64:
1929 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1930 return -ERANGE;
1931 return 0;
1932 case V4L2_CTRL_TYPE_BITMASK:
1933 if (step || min || !max || (def & ~max))
1934 return -ERANGE;
1935 return 0;
1936 case V4L2_CTRL_TYPE_MENU:
1937 case V4L2_CTRL_TYPE_INTEGER_MENU:
1938 if (min > max || def < min || def > max)
1939 return -ERANGE;
1940 /* Note: step == menu_skip_mask for menu controls.
1941 So here we check if the default value is masked out. */
1942 if (step && ((1 << def) & step))
1943 return -EINVAL;
1944 return 0;
1945 case V4L2_CTRL_TYPE_STRING:
1946 if (min > max || min < 0 || step < 1 || def)
1947 return -ERANGE;
1948 return 0;
1949 default:
1950 return 0;
1951 }
1952}
1953
03d5285b 1954/* Validate a new control */
7a7f1ab3 1955static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1956{
302ab7ce
HV		 1957 unsigned idx;
1958 int err = 0;
1959
7a7f1ab3
HV		 1960 for (idx = 0; !err && idx < ctrl->elems; idx++)
1961 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1962 return err;
0996517c
HV		 1963}
1964
1965static inline u32 node2id(struct list_head *node)
1966{
1967 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1968}
1969
1970/* Set the handler's error code if it wasn't set earlier already */
1971static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1972{
1973 if (hdl->error == 0)
1974 hdl->error = err;
1975 return err;
1976}
1977
1978/* Initialize the handler */
6cd247ef
AW		 1979int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1980 unsigned nr_of_controls_hint,
1981 struct lock_class_key *key, const char *name)
0996517c 1982{
48e3e36a 1983 mutex_init(&hdl->_lock);
77e7c4e6 1984 hdl->lock = &hdl->_lock;
6cd247ef 1985 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1986 INIT_LIST_HEAD(&hdl->ctrls);
1987 INIT_LIST_HEAD(&hdl->ctrl_refs);
6fa6f831
HV		 1988 INIT_LIST_HEAD(&hdl->requests);
1989 INIT_LIST_HEAD(&hdl->requests_queued);
1990 hdl->request_is_queued = false;
0996517c 1991 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
758d90e1
TF		 1992 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
1993 sizeof(hdl->buckets[0]),
1994 GFP_KERNEL | __GFP_ZERO);
0996517c 1995 hdl->error = hdl->buckets ? 0 : -ENOMEM;
52beeddb 1996 media_request_object_init(&hdl->req_obj);
0996517c
HV		 1997 return hdl->error;
1998}
6cd247ef 1999EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 2000
2001/* Free all controls and control refs */
2002void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
2003{
2004 struct v4l2_ctrl_ref *ref, *next_ref;
2005 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 2006 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 2007
2008 if (hdl == NULL || hdl->buckets == NULL)
2009 return;
2010
6fa6f831
HV		 2011 if (!hdl->req_obj.req && !list_empty(&hdl->requests)) {
2012 struct v4l2_ctrl_handler *req, *next_req;
2013
2014 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) {
2015 media_request_object_unbind(&req->req_obj);
2016 media_request_object_put(&req->req_obj);
2017 }
2018 }
77e7c4e6 2019 mutex_lock(hdl->lock);
0996517c
HV		 2020 /* Free all nodes */
2021 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
2022 list_del(&ref->node);
2023 kfree(ref);
2024 }
2025 /* Free all controls owned by the handler */
2026 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
2027 list_del(&ctrl->node);
77068d36
HV		 2028 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
2029 list_del(&sev->node);
758d90e1 2030 kvfree(ctrl);
0996517c 2031 }
758d90e1 2032 kvfree(hdl->buckets);
0996517c
HV		 2033 hdl->buckets = NULL;
2034 hdl->cached = NULL;
2035 hdl->error = 0;
77e7c4e6 2036 mutex_unlock(hdl->lock);
48e3e36a 2037 mutex_destroy(&hdl->_lock);
0996517c
HV		 2038}
2039EXPORT_SYMBOL(v4l2_ctrl_handler_free);
2040
2041/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
2042 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
2043 with applications that do not use the NEXT_CTRL flag.
2044
2045 We just find the n-th private user control. It's O(N), but that should not
2046 be an issue in this particular case. */
2047static struct v4l2_ctrl_ref *find_private_ref(
2048 struct v4l2_ctrl_handler *hdl, u32 id)
2049{
2050 struct v4l2_ctrl_ref *ref;
2051
2052 id -= V4L2_CID_PRIVATE_BASE;
2053 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2054 /* Search for private user controls that are compatible with
2055 VIDIOC_G/S_CTRL. */
0f8017be 2056 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 2057 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 2058 if (!ref->ctrl->is_int)
0996517c
HV		 2059 continue;
2060 if (id == 0)
2061 return ref;
2062 id--;
2063 }
2064 }
2065 return NULL;
2066}
2067
2068/* Find a control with the given ID. */
2069static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
2070{
2071 struct v4l2_ctrl_ref *ref;
2072 int bucket;
2073
2074 id &= V4L2_CTRL_ID_MASK;
2075
2076 /* Old-style private controls need special handling */
2077 if (id >= V4L2_CID_PRIVATE_BASE)
2078 return find_private_ref(hdl, id);
2079 bucket = id % hdl->nr_of_buckets;
2080
2081 /* Simple optimization: cache the last control found */
2082 if (hdl->cached && hdl->cached->ctrl->id == id)
2083 return hdl->cached;
2084
2085 /* Not in cache, search the hash */
2086 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
2087 while (ref && ref->ctrl->id != id)
2088 ref = ref->next;
2089
2090 if (ref)
2091 hdl->cached = ref; /* cache it! */
2092 return ref;
2093}
2094
2095/* Find a control with the given ID. Take the handler's lock first. */
2096static struct v4l2_ctrl_ref *find_ref_lock(
2097 struct v4l2_ctrl_handler *hdl, u32 id)
2098{
2099 struct v4l2_ctrl_ref *ref = NULL;
2100
2101 if (hdl) {
77e7c4e6 2102 mutex_lock(hdl->lock);
0996517c 2103 ref = find_ref(hdl, id);
77e7c4e6 2104 mutex_unlock(hdl->lock);
0996517c
HV		 2105 }
2106 return ref;
2107}
2108
2109/* Find a control with the given ID. */
2110struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
2111{
2112 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
2113
2114 return ref ? ref->ctrl : NULL;
2115}
2116EXPORT_SYMBOL(v4l2_ctrl_find);
2117
2118/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
2119static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
da1b1aea 2120 struct v4l2_ctrl *ctrl,
178543a3
HV		 2121 struct v4l2_ctrl_ref **ctrl_ref,
2122 bool from_other_dev, bool allocate_req)
0996517c
HV		 2123{
2124 struct v4l2_ctrl_ref *ref;
2125 struct v4l2_ctrl_ref *new_ref;
2126 u32 id = ctrl->id;
0f8017be 2127 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c 2128 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
178543a3
HV		 2129 unsigned int size_extra_req = 0;
2130
2131 if (ctrl_ref)
2132 *ctrl_ref = NULL;
0996517c 2133
d9a25471
HV		 2134 /*
2135 * Automatically add the control class if it is not yet present and
2136 * the new control is not a compound control.
2137 */
2138 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
2139 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 2140 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
2141 return hdl->error;
2142
2143 if (hdl->error)
2144 return hdl->error;
2145
178543a3
HV		 2146 if (allocate_req)
2147 size_extra_req = ctrl->elems * ctrl->elem_size;
2148 new_ref = kzalloc(sizeof(*new_ref) + size_extra_req, GFP_KERNEL);
0996517c
HV		 2149 if (!new_ref)
2150 return handler_set_err(hdl, -ENOMEM);
2151 new_ref->ctrl = ctrl;
da1b1aea 2152 new_ref->from_other_dev = from_other_dev;
178543a3
HV		 2153 if (size_extra_req)
2154 new_ref->p_req.p = &new_ref[1];
2155
0996517c
HV		 2156 if (ctrl->handler == hdl) {
2157 /* By default each control starts in a cluster of its own.
2158 new_ref->ctrl is basically a cluster array with one
2159 element, so that's perfect to use as the cluster pointer.
2160 But only do this for the handler that owns the control. */
2161 ctrl->cluster = &new_ref->ctrl;
2162 ctrl->ncontrols = 1;
2163 }
2164
2165 INIT_LIST_HEAD(&new_ref->node);
2166
77e7c4e6 2167 mutex_lock(hdl->lock);
0996517c
HV		 2168
2169 /* Add immediately at the end of the list if the list is empty, or if
2170 the last element in the list has a lower ID.
2171 This ensures that when elements are added in ascending order the
2172 insertion is an O(1) operation. */
2173 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
2174 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
2175 goto insert_in_hash;
2176 }
2177
2178 /* Find insert position in sorted list */
2179 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2180 if (ref->ctrl->id < id)
2181 continue;
2182 /* Don't add duplicates */
2183 if (ref->ctrl->id == id) {
2184 kfree(new_ref);
2185 goto unlock;
2186 }
2187 list_add(&new_ref->node, ref->node.prev);
2188 break;
2189 }
2190
2191insert_in_hash:
2192 /* Insert the control node in the hash */
2193 new_ref->next = hdl->buckets[bucket];
2194 hdl->buckets[bucket] = new_ref;
178543a3
HV		 2195 if (ctrl_ref)
2196 *ctrl_ref = new_ref;
0996517c
HV		 2197
2198unlock:
77e7c4e6 2199 mutex_unlock(hdl->lock);
0996517c
HV		 2200 return 0;
2201}
2202
2203/* Add a new control */
2204static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
2205 const struct v4l2_ctrl_ops *ops,
0176077a 2206 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 2207 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 2208 s64 min, s64 max, u64 step, s64 def,
20d88eef 2209 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 2210 u32 flags, const char * const *qmenu,
2211 const s64 *qmenu_int, void *priv)
0996517c
HV		 2212{
2213 struct v4l2_ctrl *ctrl;
d9a25471 2214 unsigned sz_extra;
20d88eef
HV		 2215 unsigned nr_of_dims = 0;
2216 unsigned elems = 1;
998e7659
HV		 2217 bool is_array;
2218 unsigned tot_ctrl_size;
302ab7ce 2219 unsigned idx;
d9a25471 2220 void *data;
2ccbe779 2221 int err;
0996517c
HV		 2222
2223 if (hdl->error)
2224 return NULL;
2225
20d88eef
HV		 2226 while (dims && dims[nr_of_dims]) {
2227 elems *= dims[nr_of_dims];
2228 nr_of_dims++;
2229 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
2230 break;
2231 }
998e7659 2232 is_array = nr_of_dims > 0;
20d88eef 2233
dda4a4d5
HV		 2234 /* Prefill elem_size for all types handled by std_type_ops */
2235 switch (type) {
2236 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 2237 elem_size = sizeof(s64);
dda4a4d5
HV		 2238 break;
2239 case V4L2_CTRL_TYPE_STRING:
d9a25471 2240 elem_size = max + 1;
dda4a4d5
HV		 2241 break;
2242 case V4L2_CTRL_TYPE_U8:
2243 elem_size = sizeof(u8);
2244 break;
2245 case V4L2_CTRL_TYPE_U16:
2246 elem_size = sizeof(u16);
2247 break;
811c5081
HV		 2248 case V4L2_CTRL_TYPE_U32:
2249 elem_size = sizeof(u32);
2250 break;
c27bb30e
PK		 2251 case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
2252 elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
2253 break;
2254 case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
2255 elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
2256 break;
dda4a4d5
HV		 2257 default:
2258 if (type < V4L2_CTRL_COMPOUND_TYPES)
2259 elem_size = sizeof(s32);
2260 break;
2261 }
998e7659 2262 tot_ctrl_size = elem_size * elems;
d9a25471 2263
0996517c 2264 /* Sanity checks */
998e7659
HV		 2265 if (id == 0 || name == NULL || !elem_size ||
2266 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 2267 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 2268 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 2269 handler_set_err(hdl, -ERANGE);
2270 return NULL;
2271 }
2ccbe779
SN		 2272 err = check_range(type, min, max, step, def);
2273 if (err) {
2274 handler_set_err(hdl, err);
02ac0480
HV		 2275 return NULL;
2276 }
998e7659
HV		 2277 if (is_array &&
2278 (type == V4L2_CTRL_TYPE_BUTTON ||
2279 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2280 handler_set_err(hdl, -EINVAL);
2281 return NULL;
2282 }
0996517c 2283
d9a25471 2284 sz_extra = 0;
0996517c 2285 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 2286 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2287 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 2288 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2289 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 2290 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2291 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 2292 type >= V4L2_CTRL_COMPOUND_TYPES ||
2293 is_array)
2294 sz_extra += 2 * tot_ctrl_size;
0996517c 2295
758d90e1 2296 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
0996517c
HV		 2297 if (ctrl == NULL) {
2298 handler_set_err(hdl, -ENOMEM);
2299 return NULL;
2300 }
2301
2302 INIT_LIST_HEAD(&ctrl->node);
77068d36 2303 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2304 ctrl->handler = hdl;
2305 ctrl->ops = ops;
0176077a 2306 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2307 ctrl->id = id;
2308 ctrl->name = name;
2309 ctrl->type = type;
2310 ctrl->flags = flags;
2311 ctrl->minimum = min;
2312 ctrl->maximum = max;
2313 ctrl->step = step;
d9a25471 2314 ctrl->default_value = def;
998e7659
HV		 2315 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2316 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2317 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2318 ctrl->is_array = is_array;
20d88eef
HV		 2319 ctrl->elems = elems;
2320 ctrl->nr_of_dims = nr_of_dims;
2321 if (nr_of_dims)
2322 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2323 ctrl->elem_size = elem_size;
ce580fe5
SA		 2324 if (type == V4L2_CTRL_TYPE_MENU)
2325 ctrl->qmenu = qmenu;
2326 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2327 ctrl->qmenu_int = qmenu_int;
0996517c 2328 ctrl->priv = priv;
d9a25471 2329 ctrl->cur.val = ctrl->val = def;
2a9ec373 2330 data = &ctrl[1];
d9a25471 2331
2a9ec373
HV		 2332 if (!ctrl->is_int) {
2333 ctrl->p_new.p = data;
998e7659 2334 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2335 } else {
2336 ctrl->p_new.p = &ctrl->val;
2337 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2338 }
302ab7ce
HV		 2339 for (idx = 0; idx < elems; idx++) {
2340 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2341 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2342 }
0176077a 2343
178543a3 2344 if (handler_new_ref(hdl, ctrl, NULL, false, false)) {
758d90e1 2345 kvfree(ctrl);
0996517c
HV		 2346 return NULL;
2347 }
77e7c4e6 2348 mutex_lock(hdl->lock);
0996517c 2349 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2350 mutex_unlock(hdl->lock);
0996517c
HV		 2351 return ctrl;
2352}
2353
2354struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2355 const struct v4l2_ctrl_config *cfg, void *priv)
2356{
2357 bool is_menu;
2358 struct v4l2_ctrl *ctrl;
2359 const char *name = cfg->name;
513521ea 2360 const char * const *qmenu = cfg->qmenu;
ce580fe5 2361 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2362 enum v4l2_ctrl_type type = cfg->type;
2363 u32 flags = cfg->flags;
0ba2aeb6
HV		 2364 s64 min = cfg->min;
2365 s64 max = cfg->max;
2366 u64 step = cfg->step;
2367 s64 def = cfg->def;
0996517c
HV		 2368
2369 if (name == NULL)
2370 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2371 &def, &flags);
2372
ce580fe5
SA		 2373 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2374 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2375 if (is_menu)
2376 WARN_ON(step);
2377 else
2378 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2379 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2380 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2381 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2382 qmenu_int == NULL) {
2383 handler_set_err(hdl, -EINVAL);
2384 return NULL;
2385 }
0996517c 2386
0176077a 2387 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2388 type, min, max,
20d88eef
HV		 2389 is_menu ? cfg->menu_skip_mask : step, def,
2390 cfg->dims, cfg->elem_size,
d9a25471 2391 flags, qmenu, qmenu_int, priv);
88365105 2392 if (ctrl)
0996517c 2393 ctrl->is_private = cfg->is_private;
0996517c
HV		 2394 return ctrl;
2395}
2396EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2397
2398/* Helper function for standard non-menu controls */
2399struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2400 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2401 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2402{
2403 const char *name;
2404 enum v4l2_ctrl_type type;
2405 u32 flags;
2406
2407 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2408 if (type == V4L2_CTRL_TYPE_MENU ||
2409 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2410 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2411 handler_set_err(hdl, -EINVAL);
2412 return NULL;
2413 }
0176077a 2414 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2415 min, max, step, def, NULL, 0,
d9a25471 2416 flags, NULL, NULL, NULL);
0996517c
HV		 2417}
2418EXPORT_SYMBOL(v4l2_ctrl_new_std);
2419
2420/* Helper function for standard menu controls */
2421struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2422 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2423 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2424{
d1e9b7c1
SN		 2425 const char * const *qmenu = NULL;
2426 const s64 *qmenu_int = NULL;
fbbb29a6 2427 unsigned int qmenu_int_len = 0;
0996517c
HV		 2428 const char *name;
2429 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2430 s64 min;
2431 s64 max = _max;
2432 s64 def = _def;
2433 u64 step;
0996517c
HV		 2434 u32 flags;
2435
2436 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2437
2438 if (type == V4L2_CTRL_TYPE_MENU)
2439 qmenu = v4l2_ctrl_get_menu(id);
2440 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2441 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2442
2443 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2444 handler_set_err(hdl, -EINVAL);
2445 return NULL;
2446 }
0176077a 2447 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2448 0, max, mask, def, NULL, 0,
d9a25471 2449 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2450}
2451EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2452
117a711a
LP		 2453/* Helper function for standard menu controls with driver defined menu */
2454struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2455 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2456 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2457{
2458 enum v4l2_ctrl_type type;
2459 const char *name;
2460 u32 flags;
0ba2aeb6
HV		 2461 u64 step;
2462 s64 min;
2463 s64 max = _max;
2464 s64 def = _def;
117a711a
LP		 2465
2466 /* v4l2_ctrl_new_std_menu_items() should only be called for
2467 * standard controls without a standard menu.
2468 */
2469 if (v4l2_ctrl_get_menu(id)) {
2470 handler_set_err(hdl, -EINVAL);
2471 return NULL;
2472 }
2473
2474 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2475 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2476 handler_set_err(hdl, -EINVAL);
2477 return NULL;
2478 }
0176077a 2479 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2480 0, max, mask, def, NULL, 0,
2481 flags, qmenu, NULL, NULL);
117a711a
LP		 2482
2483}
2484EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2485
515f3287
SN		 2486/* Helper function for standard integer menu controls */
2487struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2488 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2489 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2490{
2491 const char *name;
2492 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2493 s64 min;
2494 u64 step;
2495 s64 max = _max;
2496 s64 def = _def;
515f3287
SN		 2497 u32 flags;
2498
2499 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2500 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2501 handler_set_err(hdl, -EINVAL);
2502 return NULL;
2503 }
0176077a 2504 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2505 0, max, 0, def, NULL, 0,
d9a25471 2506 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2507}
2508EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2509
0996517c
HV		 2510/* Add the controls from another handler to our own. */
2511int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0 2512 struct v4l2_ctrl_handler *add,
da1b1aea
HV		 2513 bool (*filter)(const struct v4l2_ctrl *ctrl),
2514 bool from_other_dev)
0996517c 2515{
072e6602 2516 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2517 int ret = 0;
2518
2519 /* Do nothing if either handler is NULL or if they are the same */
2520 if (!hdl || !add || hdl == add)
2521 return 0;
2522 if (hdl->error)
2523 return hdl->error;
77e7c4e6 2524 mutex_lock(add->lock);
072e6602
HV		 2525 list_for_each_entry(ref, &add->ctrl_refs, node) {
2526 struct v4l2_ctrl *ctrl = ref->ctrl;
2527
0996517c
HV		 2528 /* Skip handler-private controls. */
2529 if (ctrl->is_private)
2530 continue;
6e239399
HV		 2531 /* And control classes */
2532 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2533 continue;
34a6b7d0
HV		 2534 /* Filter any unwanted controls */
2535 if (filter && !filter(ctrl))
2536 continue;
178543a3 2537 ret = handler_new_ref(hdl, ctrl, NULL, from_other_dev, false);
0996517c
HV		 2538 if (ret)
2539 break;
2540 }
77e7c4e6 2541 mutex_unlock(add->lock);
0996517c
HV		 2542 return ret;
2543}
2544EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2545
34a6b7d0
HV		 2546bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2547{
0f8017be 2548 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2549 return true;
0f8017be 2550 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2551 return true;
34a6b7d0
HV		 2552 switch (ctrl->id) {
2553 case V4L2_CID_AUDIO_MUTE:
2554 case V4L2_CID_AUDIO_VOLUME:
2555 case V4L2_CID_AUDIO_BALANCE:
2556 case V4L2_CID_AUDIO_BASS:
2557 case V4L2_CID_AUDIO_TREBLE:
2558 case V4L2_CID_AUDIO_LOUDNESS:
2559 return true;
2560 default:
2561 break;
2562 }
2563 return false;
2564}
2565EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2566
0996517c
HV		 2567/* Cluster controls */
2568void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2569{
5626b8c7 2570 bool has_volatiles = false;
0996517c
HV		 2571 int i;
2572
2573 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2574 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2575 return;
0996517c
HV		 2576
2577 for (i = 0; i < ncontrols; i++) {
2578 if (controls[i]) {
2579 controls[i]->cluster = controls;
2580 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2581 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2582 has_volatiles = true;
0996517c
HV		 2583 }
2584 }
5626b8c7 2585 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2586}
2587EXPORT_SYMBOL(v4l2_ctrl_cluster);
2588
72d877ca
HV		 2589void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2590 u8 manual_val, bool set_volatile)
2591{
2592 struct v4l2_ctrl *master = controls[0];
5626b8c7 2593 u32 flag = 0;
72d877ca
HV		 2594 int i;
2595
2596 v4l2_ctrl_cluster(ncontrols, controls);
2597 WARN_ON(ncontrols <= 1);
82a7c049 2598 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2599 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2600 master->is_auto = true;
5626b8c7 2601 master->has_volatiles = set_volatile;
72d877ca
HV		 2602 master->manual_mode_value = manual_val;
2603 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2604
2605 if (!is_cur_manual(master))
2606 flag = V4L2_CTRL_FLAG_INACTIVE |
2607 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2608
2609 for (i = 1; i < ncontrols; i++)
88365105 2610 if (controls[i])
72d877ca 2611 controls[i]->flags |= flag;
72d877ca
HV		 2612}
2613EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2614
0996517c
HV		 2615/* Activate/deactivate a control. */
2616void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2617{
6e239399
HV		 2618 /* invert since the actual flag is called 'inactive' */
2619 bool inactive = !active;
2620 bool old;
2621
0996517c
HV		 2622 if (ctrl == NULL)
2623 return;
2624
6e239399 2625 if (inactive)
0996517c 2626 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2627 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2628 else
2629 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2630 old = test_and_clear_bit(4, &ctrl->flags);
2631 if (old != inactive)
2632 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2633}
2634EXPORT_SYMBOL(v4l2_ctrl_activate);
2635
7a9b109d 2636void __v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
0996517c 2637{
6e239399
HV		 2638 bool old;
2639
0996517c
HV		 2640 if (ctrl == NULL)
2641 return;
2642
7a9b109d
SA		 2643 lockdep_assert_held(ctrl->handler->lock);
2644
0996517c
HV		 2645 if (grabbed)
2646 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2647 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2648 else
2649 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2650 old = test_and_clear_bit(1, &ctrl->flags);
2651 if (old != grabbed)
2652 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c 2653}
7a9b109d 2654EXPORT_SYMBOL(__v4l2_ctrl_grab);
0996517c
HV		 2655
2656/* Log the control name and value */
2657static void log_ctrl(const struct v4l2_ctrl *ctrl,
2658 const char *prefix, const char *colon)
2659{
0996517c
HV		 2660 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2661 return;
2662 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2663 return;
2664
7eafbce9 2665 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2666
0176077a
HV		 2667 ctrl->type_ops->log(ctrl);
2668
88365105
HV		 2669 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2670 V4L2_CTRL_FLAG_GRABBED |
2671 V4L2_CTRL_FLAG_VOLATILE)) {
2672 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2673 pr_cont(" inactive");
88365105 2674 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2675 pr_cont(" grabbed");
88365105 2676 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2677 pr_cont(" volatile");
88365105 2678 }
7eafbce9 2679 pr_cont("\n");
0996517c
HV		 2680}
2681
2682/* Log all controls owned by the handler */
2683void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2684 const char *prefix)
2685{
2686 struct v4l2_ctrl *ctrl;
2687 const char *colon = "";
2688 int len;
2689
2690 if (hdl == NULL)
2691 return;
2692 if (prefix == NULL)
2693 prefix = "";
2694 len = strlen(prefix);
2695 if (len && prefix[len - 1] != ' ')
2696 colon = ": ";
77e7c4e6 2697 mutex_lock(hdl->lock);
0996517c
HV		 2698 list_for_each_entry(ctrl, &hdl->ctrls, node)
2699 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2700 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2701 mutex_unlock(hdl->lock);
0996517c
HV		 2702}
2703EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2704
ffa9b9f0
SN		 2705int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2706{
2707 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2708 return 0;
2709}
2710EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2711
0996517c 2712/* Call s_ctrl for all controls owned by the handler */
cc0140e2 2713int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
0996517c
HV		 2714{
2715 struct v4l2_ctrl *ctrl;
2716 int ret = 0;
2717
2718 if (hdl == NULL)
2719 return 0;
cc0140e2
SA		 2720
2721 lockdep_assert_held(hdl->lock);
2722
0996517c
HV		 2723 list_for_each_entry(ctrl, &hdl->ctrls, node)
2724 ctrl->done = false;
2725
2726 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2727 struct v4l2_ctrl *master = ctrl->cluster[0];
2728 int i;
2729
2730 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2731 /* Skip button controls and read-only controls. */
2732 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2733 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2734 continue;
2735
2a863793
HV		 2736 for (i = 0; i < master->ncontrols; i++) {
2737 if (master->cluster[i]) {
2738 cur_to_new(master->cluster[i]);
2739 master->cluster[i]->is_new = 1;
71c6c4c9 2740 master->cluster[i]->done = true;
2a863793
HV		 2741 }
2742 }
54c911eb 2743 ret = call_op(master, s_ctrl);
0996517c
HV		 2744 if (ret)
2745 break;
0996517c 2746 }
cc0140e2
SA		 2747
2748 return ret;
2749}
2750EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
2751
2752int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2753{
2754 int ret;
2755
2756 if (hdl == NULL)
2757 return 0;
2758
2759 mutex_lock(hdl->lock);
2760 ret = __v4l2_ctrl_handler_setup(hdl);
77e7c4e6 2761 mutex_unlock(hdl->lock);
cc0140e2 2762
0996517c
HV		 2763 return ret;
2764}
2765EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2766
d9a25471
HV		 2767/* Implement VIDIOC_QUERY_EXT_CTRL */
2768int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2769{
d9a25471 2770 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2771 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2772 struct v4l2_ctrl_ref *ref;
2773 struct v4l2_ctrl *ctrl;
2774
2775 if (hdl == NULL)
2776 return -EINVAL;
2777
77e7c4e6 2778 mutex_lock(hdl->lock);
0996517c
HV		 2779
2780 /* Try to find it */
2781 ref = find_ref(hdl, id);
2782
d9a25471
HV		 2783 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2784 bool is_compound;
2785 /* Match any control that is not hidden */
2786 unsigned mask = 1;
2787 bool match = false;
2788
2789 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2790 /* Match any hidden control */
2791 match = true;
2792 } else if ((qc->id & next_flags) == next_flags) {
2793 /* Match any control, compound or not */
2794 mask = 0;
2795 }
2796
0996517c
HV		 2797 /* Find the next control with ID > qc->id */
2798
2799 /* Did we reach the end of the control list? */
2800 if (id >= node2id(hdl->ctrl_refs.prev)) {
2801 ref = NULL; /* Yes, so there is no next control */
2802 } else if (ref) {
2803 /* We found a control with the given ID, so just get
d9a25471
HV		 2804 the next valid one in the list. */
2805 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2806 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2807 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2808 if (id < ref->ctrl->id &&
2809 (is_compound & mask) == match)
2810 break;
2811 }
2812 if (&ref->node == &hdl->ctrl_refs)
2813 ref = NULL;
0996517c
HV		 2814 } else {
2815 /* No control with the given ID exists, so start
2816 searching for the next largest ID. We know there
2817 is one, otherwise the first 'if' above would have
2818 been true. */
d9a25471 2819 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2820 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2821 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2822 if (id < ref->ctrl->id &&
2823 (is_compound & mask) == match)
0996517c 2824 break;
d9a25471
HV		 2825 }
2826 if (&ref->node == &hdl->ctrl_refs)
2827 ref = NULL;
0996517c
HV		 2828 }
2829 }
77e7c4e6 2830 mutex_unlock(hdl->lock);
d9a25471 2831
0996517c
HV		 2832 if (!ref)
2833 return -EINVAL;
2834
2835 ctrl = ref->ctrl;
2836 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2837 if (id >= V4L2_CID_PRIVATE_BASE)
2838 qc->id = id;
2839 else
2840 qc->id = ctrl->id;
c0decac1 2841 strscpy(qc->name, ctrl->name, sizeof(qc->name));
9cac9d2f 2842 qc->flags = user_flags(ctrl);
d9a25471 2843 qc->type = ctrl->type;
d9a25471 2844 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2845 qc->elems = ctrl->elems;
2846 qc->nr_of_dims = ctrl->nr_of_dims;
2847 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2848 qc->minimum = ctrl->minimum;
2849 qc->maximum = ctrl->maximum;
2850 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2851 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2852 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2853 qc->step = 1;
2854 else
2855 qc->step = ctrl->step;
d9a25471
HV		 2856 return 0;
2857}
2858EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2859
2860/* Implement VIDIOC_QUERYCTRL */
2861int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2862{
2863 struct v4l2_query_ext_ctrl qec = { qc->id };
2864 int rc;
2865
2866 rc = v4l2_query_ext_ctrl(hdl, &qec);
2867 if (rc)
2868 return rc;
2869
2870 qc->id = qec.id;
2871 qc->type = qec.type;
2872 qc->flags = qec.flags;
c0decac1 2873 strscpy(qc->name, qec.name, sizeof(qc->name));
d9a25471
HV		 2874 switch (qc->type) {
2875 case V4L2_CTRL_TYPE_INTEGER:
2876 case V4L2_CTRL_TYPE_BOOLEAN:
2877 case V4L2_CTRL_TYPE_MENU:
2878 case V4L2_CTRL_TYPE_INTEGER_MENU:
2879 case V4L2_CTRL_TYPE_STRING:
2880 case V4L2_CTRL_TYPE_BITMASK:
2881 qc->minimum = qec.minimum;
2882 qc->maximum = qec.maximum;
2883 qc->step = qec.step;
2884 qc->default_value = qec.default_value;
2885 break;
2886 default:
2887 qc->minimum = 0;
2888 qc->maximum = 0;
2889 qc->step = 0;
2890 qc->default_value = 0;
2891 break;
2892 }
0996517c
HV		 2893 return 0;
2894}
2895EXPORT_SYMBOL(v4l2_queryctrl);
2896
0996517c
HV		 2897/* Implement VIDIOC_QUERYMENU */
2898int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2899{
2900 struct v4l2_ctrl *ctrl;
2901 u32 i = qm->index;
2902
2903 ctrl = v4l2_ctrl_find(hdl, qm->id);
2904 if (!ctrl)
2905 return -EINVAL;
2906
2907 qm->reserved = 0;
2908 /* Sanity checks */
ce580fe5
SA		 2909 switch (ctrl->type) {
2910 case V4L2_CTRL_TYPE_MENU:
2911 if (ctrl->qmenu == NULL)
2912 return -EINVAL;
2913 break;
2914 case V4L2_CTRL_TYPE_INTEGER_MENU:
2915 if (ctrl->qmenu_int == NULL)
2916 return -EINVAL;
2917 break;
2918 default:
2919 return -EINVAL;
2920 }
2921
2922 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2923 return -EINVAL;
ce580fe5 2924
0996517c
HV		 2925 /* Use mask to see if this menu item should be skipped */
2926 if (ctrl->menu_skip_mask & (1 << i))
2927 return -EINVAL;
2928 /* Empty menu items should also be skipped */
ce580fe5
SA		 2929 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2930 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2931 return -EINVAL;
c0decac1 2932 strscpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
ce580fe5
SA		 2933 } else {
2934 qm->value = ctrl->qmenu_int[i];
2935 }
0996517c
HV		 2936 return 0;
2937}
2938EXPORT_SYMBOL(v4l2_querymenu);
2939
6fa6f831
HV		 2940static int v4l2_ctrl_request_clone(struct v4l2_ctrl_handler *hdl,
2941 const struct v4l2_ctrl_handler *from)
2942{
2943 struct v4l2_ctrl_ref *ref;
7390ba43 2944 int err = 0;
6fa6f831
HV		 2945
2946 if (WARN_ON(!hdl || hdl == from))
2947 return -EINVAL;
2948
2949 if (hdl->error)
2950 return hdl->error;
2951
2952 WARN_ON(hdl->lock != &hdl->_lock);
2953
2954 mutex_lock(from->lock);
2955 list_for_each_entry(ref, &from->ctrl_refs, node) {
2956 struct v4l2_ctrl *ctrl = ref->ctrl;
2957 struct v4l2_ctrl_ref *new_ref;
2958
2959 /* Skip refs inherited from other devices */
2960 if (ref->from_other_dev)
2961 continue;
2962 /* And buttons */
2963 if (ctrl->type == V4L2_CTRL_TYPE_BUTTON)
2964 continue;
2965 err = handler_new_ref(hdl, ctrl, &new_ref, false, true);
2966 if (err)
2967 break;
2968 }
2969 mutex_unlock(from->lock);
2970 return err;
2971}
2972
2973static void v4l2_ctrl_request_queue(struct media_request_object *obj)
2974{
2975 struct v4l2_ctrl_handler *hdl =
2976 container_of(obj, struct v4l2_ctrl_handler, req_obj);
2977 struct v4l2_ctrl_handler *main_hdl = obj->priv;
2978 struct v4l2_ctrl_handler *prev_hdl = NULL;
2979 struct v4l2_ctrl_ref *ref_ctrl, *ref_ctrl_prev = NULL;
2980
2981 if (list_empty(&main_hdl->requests_queued))
2982 goto queue;
2983
2984 prev_hdl = list_last_entry(&main_hdl->requests_queued,
2985 struct v4l2_ctrl_handler, requests_queued);
2986 /*
2987 * Note: prev_hdl and hdl must contain the same list of control
2988 * references, so if any differences are detected then that is a
2989 * driver bug and the WARN_ON is triggered.
2990 */
2991 mutex_lock(prev_hdl->lock);
2992 ref_ctrl_prev = list_first_entry(&prev_hdl->ctrl_refs,
2993 struct v4l2_ctrl_ref, node);
2994 list_for_each_entry(ref_ctrl, &hdl->ctrl_refs, node) {
2995 if (ref_ctrl->req)
2996 continue;
2997 while (ref_ctrl_prev->ctrl->id < ref_ctrl->ctrl->id) {
2998 /* Should never happen, but just in case... */
2999 if (list_is_last(&ref_ctrl_prev->node,
3000 &prev_hdl->ctrl_refs))
3001 break;
3002 ref_ctrl_prev = list_next_entry(ref_ctrl_prev, node);
3003 }
3004 if (WARN_ON(ref_ctrl_prev->ctrl->id != ref_ctrl->ctrl->id))
3005 break;
3006 ref_ctrl->req = ref_ctrl_prev->req;
3007 }
3008 mutex_unlock(prev_hdl->lock);
3009queue:
3010 list_add_tail(&hdl->requests_queued, &main_hdl->requests_queued);
3011 hdl->request_is_queued = true;
3012}
3013
3014static void v4l2_ctrl_request_unbind(struct media_request_object *obj)
3015{
3016 struct v4l2_ctrl_handler *hdl =
3017 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3018
3019 list_del_init(&hdl->requests);
3020 if (hdl->request_is_queued) {
3021 list_del_init(&hdl->requests_queued);
3022 hdl->request_is_queued = false;
3023 }
3024}
3025
3026static void v4l2_ctrl_request_release(struct media_request_object *obj)
3027{
3028 struct v4l2_ctrl_handler *hdl =
3029 container_of(obj, struct v4l2_ctrl_handler, req_obj);
3030
3031 v4l2_ctrl_handler_free(hdl);
3032 kfree(hdl);
3033}
3034
3035static const struct media_request_object_ops req_ops = {
3036 .queue = v4l2_ctrl_request_queue,
3037 .unbind = v4l2_ctrl_request_unbind,
3038 .release = v4l2_ctrl_request_release,
3039};
3040
5f611d74
HV		 3041struct v4l2_ctrl_handler *v4l2_ctrl_request_hdl_find(struct media_request *req,
3042 struct v4l2_ctrl_handler *parent)
3043{
3044 struct media_request_object *obj;
3045
3046 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_VALIDATING &&
3047 req->state != MEDIA_REQUEST_STATE_QUEUED))
3048 return NULL;
3049
3050 obj = media_request_object_find(req, &req_ops, parent);
3051 if (obj)
3052 return container_of(obj, struct v4l2_ctrl_handler, req_obj);
3053 return NULL;
3054}
3055EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_find);
3056
3057struct v4l2_ctrl *
3058v4l2_ctrl_request_hdl_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
3059{
3060 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
3061
3062 return (ref && ref->req == ref) ? ref->ctrl : NULL;
3063}
3064EXPORT_SYMBOL_GPL(v4l2_ctrl_request_hdl_ctrl_find);
3065
6fa6f831
HV		 3066static int v4l2_ctrl_request_bind(struct media_request *req,
3067 struct v4l2_ctrl_handler *hdl,
3068 struct v4l2_ctrl_handler *from)
3069{
3070 int ret;
3071
3072 ret = v4l2_ctrl_request_clone(hdl, from);
3073
3074 if (!ret) {
3075 ret = media_request_object_bind(req, &req_ops,
3076 from, false, &hdl->req_obj);
3077 if (!ret)
3078 list_add_tail(&hdl->requests, &from->requests);
3079 }
3080 return ret;
3081}
0996517c
HV		 3082
3083/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
3084
3085 It is not a fully atomic operation, just best-effort only. After all, if
3086 multiple controls have to be set through multiple i2c writes (for example)
3087 then some initial writes may succeed while others fail. Thus leaving the
3088 system in an inconsistent state. The question is how much effort you are
3089 willing to spend on trying to make something atomic that really isn't.
3090
3091 From the point of view of an application the main requirement is that
3092 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
3093 error should be returned without actually affecting any controls.
3094
3095 If all the values are correct, then it is acceptable to just give up
3096 in case of low-level errors.
3097
3098 It is important though that the application can tell when only a partial
3099 configuration was done. The way we do that is through the error_idx field
3100 of struct v4l2_ext_controls: if that is equal to the count field then no
3101 controls were affected. Otherwise all controls before that index were
3102 successful in performing their 'get' or 'set' operation, the control at
3103 the given index failed, and you don't know what happened with the controls
3104 after the failed one. Since if they were part of a control cluster they
3105 could have been successfully processed (if a cluster member was encountered
3106 at index < error_idx), they could have failed (if a cluster member was at
3107 error_idx), or they may not have been processed yet (if the first cluster
3108 member appeared after error_idx).
3109
3110 It is all fairly theoretical, though. In practice all you can do is to
3111 bail out. If error_idx == count, then it is an application bug. If
3112 error_idx < count then it is only an application bug if the error code was
3113 EBUSY. That usually means that something started streaming just when you
3114 tried to set the controls. In all other cases it is a driver/hardware
3115 problem and all you can do is to retry or bail out.
3116
3117 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
3118 never modifies controls the error_idx is just set to whatever control
3119 has an invalid value.
3120 */
3121
3122/* Prepare for the extended g/s/try functions.
3123 Find the controls in the control array and do some basic checks. */
3124static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
3125 struct v4l2_ext_controls *cs,
d9a25471
HV		 3126 struct v4l2_ctrl_helper *helpers,
3127 bool get)
0996517c 3128{
eb5b16ef
HV		 3129 struct v4l2_ctrl_helper *h;
3130 bool have_clusters = false;
0996517c
HV		 3131 u32 i;
3132
eb5b16ef 3133 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 3134 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 3135 struct v4l2_ctrl_ref *ref;
0996517c
HV		 3136 struct v4l2_ctrl *ctrl;
3137 u32 id = c->id & V4L2_CTRL_ID_MASK;
3138
37cd3b73 3139 cs->error_idx = i;
0996517c 3140
953eae5d
RR		 3141 if (cs->which &&
3142 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
6fa6f831 3143 cs->which != V4L2_CTRL_WHICH_REQUEST_VAL &&
953eae5d 3144 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 3145 return -EINVAL;
3146
3147 /* Old-style private controls are not allowed for
3148 extended controls */
3149 if (id >= V4L2_CID_PRIVATE_BASE)
3150 return -EINVAL;
eb5b16ef
HV		 3151 ref = find_ref_lock(hdl, id);
3152 if (ref == NULL)
0996517c 3153 return -EINVAL;
dcea5601 3154 h->ref = ref;
eb5b16ef 3155 ctrl = ref->ctrl;
0996517c
HV		 3156 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
3157 return -EINVAL;
3158
eb5b16ef
HV		 3159 if (ctrl->cluster[0]->ncontrols > 1)
3160 have_clusters = true;
3161 if (ctrl->cluster[0] != ctrl)
3162 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 3163 if (ctrl->is_ptr && !ctrl->is_string) {
3164 unsigned tot_size = ctrl->elems * ctrl->elem_size;
3165
3166 if (c->size < tot_size) {
3167 if (get) {
3168 c->size = tot_size;
3169 return -ENOSPC;
3170 }
3171 return -EFAULT;
d9a25471 3172 }
302ab7ce 3173 c->size = tot_size;
d9a25471 3174 }
eb5b16ef
HV		 3175 /* Store the ref to the master control of the cluster */
3176 h->mref = ref;
eb5b16ef
HV		 3177 /* Initially set next to 0, meaning that there is no other
3178 control in this helper array belonging to the same
3179 cluster */
3180 h->next = 0;
0996517c 3181 }
0996517c 3182
eb5b16ef
HV		 3183 /* We are done if there were no controls that belong to a multi-
3184 control cluster. */
3185 if (!have_clusters)
3186 return 0;
0996517c 3187
eb5b16ef
HV		 3188 /* The code below figures out in O(n) time which controls in the list
3189 belong to the same cluster. */
0996517c 3190
eb5b16ef 3191 /* This has to be done with the handler lock taken. */
77e7c4e6 3192 mutex_lock(hdl->lock);
0996517c 3193
eb5b16ef
HV		 3194 /* First zero the helper field in the master control references */
3195 for (i = 0; i < cs->count; i++)
c082266f 3196 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 3197 for (i = 0, h = helpers; i < cs->count; i++, h++) {
3198 struct v4l2_ctrl_ref *mref = h->mref;
3199
3200 /* If the mref->helper is set, then it points to an earlier
3201 helper that belongs to the same cluster. */
3202 if (mref->helper) {
3203 /* Set the next field of mref->helper to the current
3204 index: this means that that earlier helper now
3205 points to the next helper in the same cluster. */
3206 mref->helper->next = i;
3207 /* mref should be set only for the first helper in the
3208 cluster, clear the others. */
3209 h->mref = NULL;
3210 }
3211 /* Point the mref helper to the current helper struct. */
3212 mref->helper = h;
0996517c 3213 }
77e7c4e6 3214 mutex_unlock(hdl->lock);
eb5b16ef 3215 return 0;
0996517c
HV		 3216}
3217
3218/* Handles the corner case where cs->count == 0. It checks whether the
3219 specified control class exists. If that class ID is 0, then it checks
3220 whether there are any controls at all. */
0f8017be 3221static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 3222{
6fa6f831
HV		 3223 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL ||
3224 which == V4L2_CTRL_WHICH_REQUEST_VAL)
cecfe9b8 3225 return 0;
0f8017be 3226 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 3227}
3228
0996517c 3229/* Get extended controls. Allocates the helpers array if needed. */
c41e9cff
HV		 3230static int v4l2_g_ext_ctrls_common(struct v4l2_ctrl_handler *hdl,
3231 struct v4l2_ext_controls *cs)
0996517c 3232{
eb5b16ef
HV		 3233 struct v4l2_ctrl_helper helper[4];
3234 struct v4l2_ctrl_helper *helpers = helper;
0996517c 3235 int ret;
ddac5c10 3236 int i, j;
953eae5d
RR		 3237 bool def_value;
3238
3239 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 3240
3241 cs->error_idx = cs->count;
0f8017be 3242 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 3243
3244 if (hdl == NULL)
3245 return -EINVAL;
3246
3247 if (cs->count == 0)
0f8017be 3248 return class_check(hdl, cs->which);
0996517c
HV		 3249
3250 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3251 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3252 GFP_KERNEL);
0996517c
HV		 3253 if (helpers == NULL)
3254 return -ENOMEM;
3255 }
3256
d9a25471 3257 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 3258 cs->error_idx = cs->count;
0996517c
HV		 3259
3260 for (i = 0; !ret && i < cs->count; i++)
dcea5601 3261 if (helpers[i].ref->ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
0996517c
HV		 3262 ret = -EACCES;
3263
3264 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 3265 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 3266 struct v4l2_ctrl *ctrl);
eb5b16ef 3267 struct v4l2_ctrl *master;
0996517c 3268
953eae5d
RR		 3269 ctrl_to_user = def_value ? def_to_user : cur_to_user;
3270
eb5b16ef 3271 if (helpers[i].mref == NULL)
0996517c
HV		 3272 continue;
3273
eb5b16ef 3274 master = helpers[i].mref->ctrl;
0996517c
HV		 3275 cs->error_idx = i;
3276
3277 v4l2_ctrl_lock(master);
ddac5c10
HV		 3278
3279 /* g_volatile_ctrl will update the new control values */
953eae5d
RR		 3280 if (!def_value &&
3281 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
3282 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 3283 for (j = 0; j < master->ncontrols; j++)
3284 cur_to_new(master->cluster[j]);
54c911eb 3285 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 3286 ctrl_to_user = new_to_user;
ddac5c10
HV		 3287 }
3288 /* If OK, then copy the current (for non-volatile controls)
3289 or the new (for volatile controls) control values to the
3290 caller */
eb5b16ef
HV		 3291 if (!ret) {
3292 u32 idx = i;
3293
3294 do {
6fa6f831
HV		 3295 if (helpers[idx].ref->req)
3296 ret = req_to_user(cs->controls + idx,
3297 helpers[idx].ref->req);
3298 else
3299 ret = ctrl_to_user(cs->controls + idx,
3300 helpers[idx].ref->ctrl);
eb5b16ef
HV		 3301 idx = helpers[idx].next;
3302 } while (!ret && idx);
3303 }
0996517c 3304 v4l2_ctrl_unlock(master);
0996517c
HV		 3305 }
3306
3307 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3308 kvfree(helpers);
0996517c
HV		 3309 return ret;
3310}
c41e9cff
HV		 3311
3312static struct media_request_object *
3313v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
3314 struct media_request *req, bool set)
3315{
3316 struct media_request_object *obj;
3317 struct v4l2_ctrl_handler *new_hdl;
3318 int ret;
3319
3320 if (IS_ERR(req))
3321 return ERR_CAST(req);
3322
3323 if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
3324 return ERR_PTR(-EBUSY);
3325
3326 obj = media_request_object_find(req, &req_ops, hdl);
3327 if (obj)
3328 return obj;
3329 if (!set)
3330 return ERR_PTR(-ENOENT);
3331
3332 new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
3333 if (!new_hdl)
3334 return ERR_PTR(-ENOMEM);
3335
3336 obj = &new_hdl->req_obj;
3337 ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
3338 if (!ret)
3339 ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
3340 if (ret) {
3341 kfree(new_hdl);
3342
3343 return ERR_PTR(ret);
3344 }
3345
3346 media_request_object_get(obj);
3347 return obj;
3348}
3349
3350int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3351 struct v4l2_ext_controls *cs)
3352{
3353 struct media_request_object *obj = NULL;
ca6c1633 3354 struct media_request *req = NULL;
c41e9cff
HV		 3355 int ret;
3356
3357 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
c41e9cff
HV		 3358 if (!mdev || cs->request_fd < 0)
3359 return -EINVAL;
3360
3361 req = media_request_get_by_fd(mdev, cs->request_fd);
3362 if (IS_ERR(req))
3363 return PTR_ERR(req);
3364
b6b84557 3365 if (req->state != MEDIA_REQUEST_STATE_COMPLETE) {
c41e9cff 3366 media_request_put(req);
b6b84557 3367 return -EACCES;
c41e9cff
HV		 3368 }
3369
ca6c1633
HV		 3370 ret = media_request_lock_for_access(req);
3371 if (ret) {
3372 media_request_put(req);
3373 return ret;
3374 }
3375
c41e9cff 3376 obj = v4l2_ctrls_find_req_obj(hdl, req, false);
ca6c1633
HV		 3377 if (IS_ERR(obj)) {
3378 media_request_unlock_for_access(req);
3379 media_request_put(req);
c41e9cff 3380 return PTR_ERR(obj);
ca6c1633 3381 }
c41e9cff
HV		 3382
3383 hdl = container_of(obj, struct v4l2_ctrl_handler,
3384 req_obj);
3385 }
3386
3387 ret = v4l2_g_ext_ctrls_common(hdl, cs);
3388
ca6c1633
HV		 3389 if (obj) {
3390 media_request_unlock_for_access(req);
c41e9cff 3391 media_request_object_put(obj);
ca6c1633
HV		 3392 media_request_put(req);
3393 }
c41e9cff
HV		 3394 return ret;
3395}
0996517c
HV		 3396EXPORT_SYMBOL(v4l2_g_ext_ctrls);
3397
0996517c 3398/* Helper function to get a single control */
03d5285b 3399static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 3400{
3401 struct v4l2_ctrl *master = ctrl->cluster[0];
3402 int ret = 0;
ddac5c10 3403 int i;
0996517c 3404
d9a25471 3405 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 3406 * cur_to_user() calls below would need to be modified not to access
3407 * userspace memory when called from get_ctrl().
3408 */
a8077734 3409 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 3410 return -EINVAL;
3411
0996517c
HV		 3412 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
3413 return -EACCES;
3414
3415 v4l2_ctrl_lock(master);
3416 /* g_volatile_ctrl will update the current control values */
5626b8c7 3417 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 3418 for (i = 0; i < master->ncontrols; i++)
3419 cur_to_new(master->cluster[i]);
54c911eb 3420 ret = call_op(master, g_volatile_ctrl);
03d5285b 3421 new_to_user(c, ctrl);
ddac5c10 3422 } else {
03d5285b 3423 cur_to_user(c, ctrl);
ddac5c10 3424 }
0996517c
HV		 3425 v4l2_ctrl_unlock(master);
3426 return ret;
3427}
3428
3429int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
3430{
3431 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 3432 struct v4l2_ext_control c;
3433 int ret;
0996517c 3434
d9a25471 3435 if (ctrl == NULL || !ctrl->is_int)
0996517c 3436 return -EINVAL;
03d5285b
LP		 3437 ret = get_ctrl(ctrl, &c);
3438 control->value = c.value;
3439 return ret;
0996517c
HV		 3440}
3441EXPORT_SYMBOL(v4l2_g_ctrl);
3442
0996517c
HV		 3443s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
3444{
03d5285b 3445 struct v4l2_ext_control c;
0996517c
HV		 3446
3447 /* It's a driver bug if this happens. */
d9a25471 3448 WARN_ON(!ctrl->is_int);
03d5285b
LP		 3449 c.value = 0;
3450 get_ctrl(ctrl, &c);
3451 return c.value;
0996517c
HV		 3452}
3453EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
3454
03d5285b
LP		 3455s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
3456{
3457 struct v4l2_ext_control c;
3458
3459 /* It's a driver bug if this happens. */
998e7659 3460 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 3461 c.value64 = 0;
03d5285b 3462 get_ctrl(ctrl, &c);
a8077734 3463 return c.value64;
03d5285b
LP		 3464}
3465EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
3466
0996517c
HV		 3467
3468/* Core function that calls try/s_ctrl and ensures that the new value is
3469 copied to the current value on a set.
3470 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 3471static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
3472 bool set, u32 ch_flags)
0996517c 3473{
72d877ca 3474 bool update_flag;
eb5b16ef 3475 int ret;
0996517c
HV		 3476 int i;
3477
3478 /* Go through the cluster and either validate the new value or
3479 (if no new value was set), copy the current value to the new
3480 value, ensuring a consistent view for the control ops when
3481 called. */
eb5b16ef 3482 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 3483 struct v4l2_ctrl *ctrl = master->cluster[i];
3484
3485 if (ctrl == NULL)
3486 continue;
3487
eb5b16ef
HV		 3488 if (!ctrl->is_new) {
3489 cur_to_new(ctrl);
0996517c
HV		 3490 continue;
3491 }
eb5b16ef
HV		 3492 /* Check again: it may have changed since the
3493 previous check in try_or_set_ext_ctrls(). */
3494 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3495 return -EBUSY;
0996517c
HV		 3496 }
3497
eb5b16ef 3498 ret = call_op(master, try_ctrl);
0996517c
HV		 3499
3500 /* Don't set if there is no change */
72d877ca
HV		 3501 if (ret || !set || !cluster_changed(master))
3502 return ret;
3503 ret = call_op(master, s_ctrl);
72d877ca
HV		 3504 if (ret)
3505 return ret;
3506
eb5b16ef 3507 /* If OK, then make the new values permanent. */
72d877ca 3508 update_flag = is_cur_manual(master) != is_new_manual(master);
0245abf8
HV		 3509
3510 for (i = 0; i < master->ncontrols; i++) {
3511 /*
3512 * If we switch from auto to manual mode, and this cluster
3513 * contains volatile controls, then all non-master controls
3514 * have to be marked as changed. The 'new' value contains
3515 * the volatile value (obtained by update_from_auto_cluster),
3516 * which now has to become the current value.
3517 */
3518 if (i && update_flag && is_new_manual(master) &&
3519 master->has_volatiles && master->cluster[i])
3520 master->cluster[i]->has_changed = true;
3521
2ccbe779
SN		 3522 new_to_cur(fh, master->cluster[i], ch_flags |
3523 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
0245abf8 3524 }
72d877ca 3525 return 0;
0996517c
HV		 3526}
3527
e6402585
HV		 3528/* Validate controls. */
3529static int validate_ctrls(struct v4l2_ext_controls *cs,
3530 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3531{
e6402585 3532 unsigned i;
0996517c
HV		 3533 int ret = 0;
3534
eb5b16ef 3535 cs->error_idx = cs->count;
0996517c 3536 for (i = 0; i < cs->count; i++) {
dcea5601 3537 struct v4l2_ctrl *ctrl = helpers[i].ref->ctrl;
7a7f1ab3 3538 union v4l2_ctrl_ptr p_new;
0996517c 3539
e6402585 3540 cs->error_idx = i;
0996517c
HV		 3541
3542 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3543 return -EACCES;
3544 /* This test is also done in try_set_control_cluster() which
3545 is called in atomic context, so that has the final say,
3546 but it makes sense to do an up-front check as well. Once
3547 an error occurs in try_set_control_cluster() some other
3548 controls may have been set already and we want to do a
3549 best-effort to avoid that. */
3550 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3551 return -EBUSY;
7a7f1ab3
HV		 3552 /*
3553 * Skip validation for now if the payload needs to be copied
3554 * from userspace into kernelspace. We'll validate those later.
3555 */
3556 if (ctrl->is_ptr)
3557 continue;
3558 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3559 p_new.p_s64 = &cs->controls[i].value64;
3560 else
3561 p_new.p_s32 = &cs->controls[i].value;
3562 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3563 if (ret)
3564 return ret;
0996517c 3565 }
e6402585
HV		 3566 return 0;
3567}
3568
5626b8c7
HV		 3569/* Obtain the current volatile values of an autocluster and mark them
3570 as new. */
3571static void update_from_auto_cluster(struct v4l2_ctrl *master)
3572{
3573 int i;
3574
759b26a1 3575 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3576 cur_to_new(master->cluster[i]);
3577 if (!call_op(master, g_volatile_ctrl))
3578 for (i = 1; i < master->ncontrols; i++)
3579 if (master->cluster[i])
3580 master->cluster[i]->is_new = 1;
3581}
3582
e6402585 3583/* Try or try-and-set controls */
c41e9cff
HV		 3584static int try_set_ext_ctrls_common(struct v4l2_fh *fh,
3585 struct v4l2_ctrl_handler *hdl,
3586 struct v4l2_ext_controls *cs, bool set)
e6402585
HV		 3587{
3588 struct v4l2_ctrl_helper helper[4];
3589 struct v4l2_ctrl_helper *helpers = helper;
3590 unsigned i, j;
3591 int ret;
3592
3593 cs->error_idx = cs->count;
953eae5d
RR		 3594
3595 /* Default value cannot be changed */
3596 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3597 return -EINVAL;
3598
0f8017be 3599 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3600
3601 if (hdl == NULL)
3602 return -EINVAL;
3603
3604 if (cs->count == 0)
0f8017be 3605 return class_check(hdl, cs->which);
0996517c 3606
e6402585 3607 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3608 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3609 GFP_KERNEL);
e6402585
HV		 3610 if (!helpers)
3611 return -ENOMEM;
3612 }
d9a25471 3613 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3614 if (!ret)
3615 ret = validate_ctrls(cs, helpers, set);
3616 if (ret && set)
3617 cs->error_idx = cs->count;
0996517c 3618 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3619 struct v4l2_ctrl *master;
3620 u32 idx = i;
0996517c 3621
eb5b16ef 3622 if (helpers[i].mref == NULL)
0996517c
HV		 3623 continue;
3624
37cd3b73 3625 cs->error_idx = i;
eb5b16ef
HV		 3626 master = helpers[i].mref->ctrl;
3627 v4l2_ctrl_lock(master);
0996517c 3628
2a863793 3629 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3630 for (j = 0; j < master->ncontrols; j++)
3631 if (master->cluster[j])
2a863793 3632 master->cluster[j]->is_new = 0;
0996517c 3633
5626b8c7
HV		 3634 /* For volatile autoclusters that are currently in auto mode
3635 we need to discover if it will be set to manual mode.
3636 If so, then we have to copy the current volatile values
3637 first since those will become the new manual values (which
3638 may be overwritten by explicit new values from this set
3639 of controls). */
3640 if (master->is_auto && master->has_volatiles &&
3641 !is_cur_manual(master)) {
3642 /* Pick an initial non-manual value */
3643 s32 new_auto_val = master->manual_mode_value + 1;
3644 u32 tmp_idx = idx;
3645
3646 do {
3647 /* Check if the auto control is part of the
3648 list, and remember the new value. */
dcea5601 3649 if (helpers[tmp_idx].ref->ctrl == master)
5626b8c7
HV		 3650 new_auto_val = cs->controls[tmp_idx].value;
3651 tmp_idx = helpers[tmp_idx].next;
3652 } while (tmp_idx);
3653 /* If the new value == the manual value, then copy
3654 the current volatile values. */
3655 if (new_auto_val == master->manual_mode_value)
3656 update_from_auto_cluster(master);
3657 }
3658
0996517c 3659 /* Copy the new caller-supplied control values.
2a863793 3660 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3661 do {
dcea5601 3662 struct v4l2_ctrl *ctrl = helpers[idx].ref->ctrl;
7a7f1ab3
HV		 3663
3664 ret = user_to_new(cs->controls + idx, ctrl);
3665 if (!ret && ctrl->is_ptr)
3666 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3667 idx = helpers[idx].next;
3668 } while (!ret && idx);
0996517c
HV		 3669
3670 if (!ret)
6fa6f831
HV		 3671 ret = try_or_set_cluster(fh, master,
3672 !hdl->req_obj.req && set, 0);
3673 if (!ret && hdl->req_obj.req && set) {
3674 for (j = 0; j < master->ncontrols; j++) {
3675 struct v4l2_ctrl_ref *ref =
3676 find_ref(hdl, master->cluster[j]->id);
3677
3678 new_to_req(ref);
3679 }
3680 }
0996517c
HV		 3681
3682 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3683 if (!ret) {
3684 idx = i;
3685 do {
adf41b9b 3686 ret = new_to_user(cs->controls + idx,
dcea5601 3687 helpers[idx].ref->ctrl);
eb5b16ef
HV		 3688 idx = helpers[idx].next;
3689 } while (!ret && idx);
3690 }
3691 v4l2_ctrl_unlock(master);
0996517c 3692 }
0996517c 3693
0996517c 3694 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3695 kvfree(helpers);
0996517c
HV		 3696 return ret;
3697}
3698
c41e9cff
HV		 3699static int try_set_ext_ctrls(struct v4l2_fh *fh,
3700 struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3701 struct v4l2_ext_controls *cs, bool set)
3702{
3703 struct media_request_object *obj = NULL;
3704 struct media_request *req = NULL;
3705 int ret;
3706
3707 if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
3708 if (!mdev || cs->request_fd < 0)
3709 return -EINVAL;
3710
3711 req = media_request_get_by_fd(mdev, cs->request_fd);
3712 if (IS_ERR(req))
3713 return PTR_ERR(req);
3714
3715 ret = media_request_lock_for_update(req);
3716 if (ret) {
3717 media_request_put(req);
3718 return ret;
3719 }
3720
3721 obj = v4l2_ctrls_find_req_obj(hdl, req, set);
c41e9cff
HV		 3722 if (IS_ERR(obj)) {
3723 media_request_unlock_for_update(req);
ffda0b4c 3724 media_request_put(req);
c41e9cff
HV		 3725 return PTR_ERR(obj);
3726 }
3727 hdl = container_of(obj, struct v4l2_ctrl_handler,
3728 req_obj);
3729 }
3730
3731 ret = try_set_ext_ctrls_common(fh, hdl, cs, set);
3732
3733 if (obj) {
ffda0b4c 3734 media_request_unlock_for_update(req);
c41e9cff 3735 media_request_object_put(obj);
ffda0b4c 3736 media_request_put(req);
c41e9cff
HV		 3737 }
3738
3739 return ret;
3740}
3741
3742int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
3743 struct v4l2_ext_controls *cs)
0996517c 3744{
c41e9cff 3745 return try_set_ext_ctrls(NULL, hdl, mdev, cs, false);
0996517c
HV		 3746}
3747EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3748
ab892bac 3749int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
c41e9cff 3750 struct media_device *mdev, struct v4l2_ext_controls *cs)
0996517c 3751{
c41e9cff 3752 return try_set_ext_ctrls(fh, hdl, mdev, cs, true);
0996517c
HV		 3753}
3754EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3755
0996517c 3756/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3757static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3758{
3759 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3760 int ret;
0996517c
HV		 3761 int i;
3762
2a863793 3763 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3764 for (i = 0; i < master->ncontrols; i++)
3765 if (master->cluster[i])
2a863793 3766 master->cluster[i]->is_new = 0;
0996517c 3767
7a7f1ab3
HV		 3768 ret = validate_new(ctrl, ctrl->p_new);
3769 if (ret)
3770 return ret;
5d0360a4 3771
5626b8c7
HV		 3772 /* For autoclusters with volatiles that are switched from auto to
3773 manual mode we have to update the current volatile values since
3774 those will become the initial manual values after such a switch. */
3775 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3776 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3777 update_from_auto_cluster(master);
03d5285b 3778
5d0360a4 3779 ctrl->is_new = 1;
2ccbe779
SN		 3780 return try_or_set_cluster(fh, master, true, ch_flags);
3781}
03d5285b 3782
2ccbe779
SN		 3783/* Helper function for VIDIOC_S_CTRL compatibility */
3784static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3785 struct v4l2_ext_control *c)
3786{
7a7f1ab3 3787 int ret;
2ccbe779 3788
7a7f1ab3
HV		 3789 v4l2_ctrl_lock(ctrl);
3790 user_to_new(c, ctrl);
3791 ret = set_ctrl(fh, ctrl, 0);
3792 if (!ret)
3793 cur_to_user(c, ctrl);
3794 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3795 return ret;
3796}
3797
ab892bac
HV		 3798int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3799 struct v4l2_control *control)
0996517c
HV		 3800{
3801 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3802 struct v4l2_ext_control c = { control->id };
03d5285b 3803 int ret;
0996517c 3804
d9a25471 3805 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3806 return -EINVAL;
3807
7ebbc39f
HV		 3808 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3809 return -EACCES;
3810
03d5285b 3811 c.value = control->value;
2ccbe779 3812 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3813 control->value = c.value;
3814 return ret;
0996517c
HV		 3815}
3816EXPORT_SYMBOL(v4l2_s_ctrl);
3817
0c4348ad 3818int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3819{
0c4348ad 3820 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3821
0996517c 3822 /* It's a driver bug if this happens. */
d9a25471 3823 WARN_ON(!ctrl->is_int);
5d0360a4 3824 ctrl->val = val;
7a7f1ab3 3825 return set_ctrl(NULL, ctrl, 0);
0996517c 3826}
0c4348ad 3827EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3828
0c4348ad 3829int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3830{
0c4348ad 3831 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3832
3833 /* It's a driver bug if this happens. */
998e7659 3834 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3835 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3836 return set_ctrl(NULL, ctrl, 0);
03d5285b 3837}
0c4348ad 3838EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3839
5d0360a4
HV		 3840int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3841{
3842 lockdep_assert_held(ctrl->handler->lock);
3843
3844 /* It's a driver bug if this happens. */
3845 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
c0decac1 3846 strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3847 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3848}
3849EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3850
6fa6f831
HV		 3851void v4l2_ctrl_request_complete(struct media_request *req,
3852 struct v4l2_ctrl_handler *main_hdl)
3853{
3854 struct media_request_object *obj;
3855 struct v4l2_ctrl_handler *hdl;
3856 struct v4l2_ctrl_ref *ref;
3857
3858 if (!req || !main_hdl)
3859 return;
3860
3861 /*
3862 * Note that it is valid if nothing was found. It means
3863 * that this request doesn't have any controls and so just
3864 * wants to leave the controls unchanged.
3865 */
3866 obj = media_request_object_find(req, &req_ops, main_hdl);
3867 if (!obj)
3868 return;
3869 hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
3870
3871 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
3872 struct v4l2_ctrl *ctrl = ref->ctrl;
3873 struct v4l2_ctrl *master = ctrl->cluster[0];
3874 unsigned int i;
3875
3876 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
3877 ref->req = ref;
3878
3879 v4l2_ctrl_lock(master);
3880 /* g_volatile_ctrl will update the current control values */
3881 for (i = 0; i < master->ncontrols; i++)
3882 cur_to_new(master->cluster[i]);
3883 call_op(master, g_volatile_ctrl);
3884 new_to_req(ref);
3885 v4l2_ctrl_unlock(master);
3886 continue;
3887 }
3888 if (ref->req == ref)
3889 continue;
3890
3891 v4l2_ctrl_lock(ctrl);
3892 if (ref->req)
3893 ptr_to_ptr(ctrl, ref->req->p_req, ref->p_req);
3894 else
3895 ptr_to_ptr(ctrl, ctrl->p_cur, ref->p_req);
3896 v4l2_ctrl_unlock(ctrl);
3897 }
3898
3899 WARN_ON(!hdl->request_is_queued);
3900 list_del_init(&hdl->requests_queued);
3901 hdl->request_is_queued = false;
3902 media_request_object_complete(obj);
3903 media_request_object_put(obj);
3904}
3905EXPORT_SYMBOL(v4l2_ctrl_request_complete);
3906
3907void v4l2_ctrl_request_setup(struct media_request *req,
3908 struct v4l2_ctrl_handler *main_hdl)
3909{
3910 struct media_request_object *obj;
3911 struct v4l2_ctrl_handler *hdl;
3912 struct v4l2_ctrl_ref *ref;
3913
3914 if (!req || !main_hdl)
3915 return;
3916
3917 if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
3918 return;
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)
3927 return;
3928 if (obj->completed) {
3929 media_request_object_put(obj);
3930 return;
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
3998 try_or_set_cluster(NULL, master, true, 0);
3999
4000 v4l2_ctrl_unlock(master);
4001 }
4002
4003 media_request_object_put(obj);
4004}
4005EXPORT_SYMBOL(v4l2_ctrl_request_setup);
4006
8ac7a949
HV		 4007void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
4008{
4009 if (ctrl == NULL)
4010 return;
4011 if (notify == NULL) {
4012 ctrl->call_notify = 0;
4013 return;
4014 }
4015 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
4016 return;
4017 ctrl->handler->notify = notify;
4018 ctrl->handler->notify_priv = priv;
4019 ctrl->call_notify = 1;
4020}
4021EXPORT_SYMBOL(v4l2_ctrl_notify);
4022
5a573925 4023int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 4024 s64 min, s64 max, u64 step, s64 def)
2ccbe779 4025{
95ad7ff3
RR		 4026 bool value_changed;
4027 bool range_changed = false;
302ab7ce 4028 int ret;
2ccbe779 4029
5a573925
SA		 4030 lockdep_assert_held(ctrl->handler->lock);
4031
2ccbe779
SN		 4032 switch (ctrl->type) {
4033 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 4034 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 4035 case V4L2_CTRL_TYPE_BOOLEAN:
4036 case V4L2_CTRL_TYPE_MENU:
4037 case V4L2_CTRL_TYPE_INTEGER_MENU:
4038 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 4039 case V4L2_CTRL_TYPE_U8:
4040 case V4L2_CTRL_TYPE_U16:
811c5081 4041 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 4042 if (ctrl->is_array)
4043 return -EINVAL;
4044 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 4045 if (ret)
4046 return ret;
4047 break;
4048 default:
4049 return -EINVAL;
4050 }
95ad7ff3
RR		 4051 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
4052 (ctrl->step != step) || ctrl->default_value != def) {
4053 range_changed = true;
4054 ctrl->minimum = min;
4055 ctrl->maximum = max;
4056 ctrl->step = step;
4057 ctrl->default_value = def;
4058 }
7a7f1ab3
HV		 4059 cur_to_new(ctrl);
4060 if (validate_new(ctrl, ctrl->p_new)) {
4061 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
4062 *ctrl->p_new.p_s64 = def;
4063 else
4064 *ctrl->p_new.p_s32 = def;
4065 }
4066
4067 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 4068 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 4069 else
95ad7ff3
RR		 4070 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
4071 if (value_changed)
7a7f1ab3 4072 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 4073 else if (range_changed)
2ccbe779 4074 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 4075 return ret;
4076}
5a573925 4077EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 4078
6e6d76cd 4079static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 4080{
3e366149
HG		 4081 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4082
4083 if (ctrl == NULL)
4084 return -EINVAL;
4085
6e239399 4086 v4l2_ctrl_lock(ctrl);
77068d36 4087 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 4088 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 4089 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 4090 struct v4l2_event ev;
c12fcfd6 4091 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 4092
c12fcfd6
HV		 4093 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
4094 changes |= V4L2_EVENT_CTRL_CH_VALUE;
4095 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 4096 /* Mark the queue as active, allowing this initial
4097 event to be accepted. */
4098 sev->elems = elems;
77068d36 4099 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 4100 }
4101 v4l2_ctrl_unlock(ctrl);
3e366149 4102 return 0;
6e239399 4103}
6e239399 4104
3e366149 4105static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 4106{
3e366149
HG		 4107 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
4108
814e92b8
HV		 4109 if (ctrl == NULL)
4110 return;
4111
6e239399 4112 v4l2_ctrl_lock(ctrl);
77068d36 4113 list_del(&sev->node);
6e239399
HV		 4114 v4l2_ctrl_unlock(ctrl);
4115}
3e366149
HG		 4116
4117void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
4118{
4119 u32 old_changes = old->u.ctrl.changes;
4120
4121 old->u.ctrl = new->u.ctrl;
4122 old->u.ctrl.changes |= old_changes;
4123}
4124EXPORT_SYMBOL(v4l2_ctrl_replace);
4125
4126void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
4127{
4128 new->u.ctrl.changes |= old->u.ctrl.changes;
4129}
4130EXPORT_SYMBOL(v4l2_ctrl_merge);
4131
4132const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
4133 .add = v4l2_ctrl_add_event,
4134 .del = v4l2_ctrl_del_event,
4135 .replace = v4l2_ctrl_replace,
4136 .merge = v4l2_ctrl_merge,
4137};
4138EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 4139
4140int v4l2_ctrl_log_status(struct file *file, void *fh)
4141{
4142 struct video_device *vfd = video_devdata(file);
4143 struct v4l2_fh *vfh = file->private_data;
4144
4145 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
4146 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
4147 vfd->v4l2_dev->name);
4148 return 0;
4149}
4150EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 4151
4152int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 4153 const struct v4l2_event_subscription *sub)
a26243b0
HV		 4154{
4155 if (sub->type == V4L2_EVENT_CTRL)
3e366149 4156 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 4157 return -EINVAL;
4158}
4159EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
4160
22fa4279
SN		 4161int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
4162 struct v4l2_event_subscription *sub)
4163{
4164 if (!sd->ctrl_handler)
4165 return -EINVAL;
4166 return v4l2_ctrl_subscribe_event(fh, sub);
4167}
4168EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
4169
c23e0cb8 4170__poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
a26243b0
HV		 4171{
4172 struct v4l2_fh *fh = file->private_data;
4173
4174 if (v4l2_event_pending(fh))
a9a08845 4175 return EPOLLPRI;
a26243b0
HV		 4176 poll_wait(file, &fh->wait, wait);
4177 return 0;
4178}
4179EXPORT_SYMBOL(v4l2_ctrl_poll);
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