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[media] cx25821, cx88, tm6000: use SNDRV_DEFAULT_ENABLE_PNP
[linux-2.6-block.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
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>
2b80163c 22#include <linux/slab.h>
35a24636 23#include <linux/export.h>
0996517c
HV		 24#include <media/v4l2-ioctl.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ctrls.h>
6e239399 27#include <media/v4l2-event.h>
0996517c
HV		 28#include <media/v4l2-dev.h>
29
ddac5c10
HV		 30#define has_op(master, op) \
31 (master->ops && master->ops->op)
54c911eb 32#define call_op(master, op) \
ddac5c10 33 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 34
0996517c 35/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 36struct v4l2_ctrl_helper {
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref *mref;
0996517c
HV		 39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
43 u32 next;
0996517c
HV		 44};
45
72d877ca 46/* Small helper function to determine if the autocluster is set to manual
88365105 47 mode. */
72d877ca
HV		 48static bool is_cur_manual(const struct v4l2_ctrl *master)
49{
50 return master->is_auto && master->cur.val == master->manual_mode_value;
51}
52
53/* Same as above, but this checks the against the new value instead of the
54 current value. */
55static bool is_new_manual(const struct v4l2_ctrl *master)
56{
57 return master->is_auto && master->val == master->manual_mode_value;
58}
59
0996517c
HV		 60/* Returns NULL or a character pointer array containing the menu for
61 the given control ID. The pointer array ends with a NULL pointer.
62 An empty string signifies a menu entry that is invalid. This allows
63 drivers to disable certain options if it is not supported. */
513521ea 64const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 65{
513521ea 66 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 67 "44.1 kHz",
68 "48 kHz",
69 "32 kHz",
70 NULL
71 };
513521ea 72 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 73 "MPEG-1/2 Layer I",
74 "MPEG-1/2 Layer II",
75 "MPEG-1/2 Layer III",
76 "MPEG-2/4 AAC",
77 "AC-3",
78 NULL
79 };
513521ea 80 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 81 "32 kbps",
82 "64 kbps",
83 "96 kbps",
84 "128 kbps",
85 "160 kbps",
86 "192 kbps",
87 "224 kbps",
88 "256 kbps",
89 "288 kbps",
90 "320 kbps",
91 "352 kbps",
92 "384 kbps",
93 "416 kbps",
94 "448 kbps",
95 NULL
96 };
513521ea 97 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 98 "32 kbps",
99 "48 kbps",
100 "56 kbps",
101 "64 kbps",
102 "80 kbps",
103 "96 kbps",
104 "112 kbps",
105 "128 kbps",
106 "160 kbps",
107 "192 kbps",
108 "224 kbps",
109 "256 kbps",
110 "320 kbps",
111 "384 kbps",
112 NULL
113 };
513521ea 114 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 115 "32 kbps",
116 "40 kbps",
117 "48 kbps",
118 "56 kbps",
119 "64 kbps",
120 "80 kbps",
121 "96 kbps",
122 "112 kbps",
123 "128 kbps",
124 "160 kbps",
125 "192 kbps",
126 "224 kbps",
127 "256 kbps",
128 "320 kbps",
129 NULL
130 };
513521ea 131 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 132 "32 kbps",
133 "40 kbps",
134 "48 kbps",
135 "56 kbps",
136 "64 kbps",
137 "80 kbps",
138 "96 kbps",
139 "112 kbps",
140 "128 kbps",
141 "160 kbps",
142 "192 kbps",
143 "224 kbps",
144 "256 kbps",
145 "320 kbps",
146 "384 kbps",
147 "448 kbps",
148 "512 kbps",
149 "576 kbps",
150 "640 kbps",
151 NULL
152 };
513521ea 153 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 154 "Stereo",
155 "Joint Stereo",
156 "Dual",
157 "Mono",
158 NULL
159 };
513521ea 160 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 161 "Bound 4",
162 "Bound 8",
163 "Bound 12",
164 "Bound 16",
165 NULL
166 };
513521ea 167 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 168 "No Emphasis",
169 "50/15 us",
170 "CCITT J17",
171 NULL
172 };
513521ea 173 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 174 "No CRC",
175 "16-bit CRC",
176 NULL
177 };
24c19a21
HV		 178 static const char * const mpeg_audio_dec_playback[] = {
179 "Auto",
180 "Stereo",
181 "Left",
182 "Right",
183 "Mono",
184 "Swapped Stereo",
185 NULL
186 };
513521ea 187 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 188 "MPEG-1",
189 "MPEG-2",
190 "MPEG-4 AVC",
191 NULL
192 };
513521ea 193 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 194 "1x1",
195 "4x3",
196 "16x9",
197 "2.21x1",
198 NULL
199 };
513521ea 200 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 201 "Variable Bitrate",
202 "Constant Bitrate",
203 NULL
204 };
513521ea 205 static const char * const mpeg_stream_type[] = {
0996517c
HV		 206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
212 NULL
213 };
513521ea 214 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 215 "No VBI",
064f5096 216 "Private Packet, IVTV Format",
0996517c
HV		 217 NULL
218 };
513521ea 219 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 220 "Disabled",
221 "50 Hz",
222 "60 Hz",
d26a6635 223 "Auto",
0996517c
HV		 224 NULL
225 };
513521ea 226 static const char * const camera_exposure_auto[] = {
0996517c
HV		 227 "Auto Mode",
228 "Manual Mode",
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
231 NULL
232 };
cf072139
SN		 233 static const char * const camera_exposure_metering[] = {
234 "Average",
235 "Center Weighted",
236 "Spot",
fc39f46b 237 "Matrix",
cf072139
SN		 238 NULL
239 };
2272ab65
SN		 240 static const char * const camera_auto_focus_range[] = {
241 "Auto",
242 "Normal",
243 "Macro",
244 "Infinity",
245 NULL
246 };
513521ea 247 static const char * const colorfx[] = {
0996517c
HV		 248 "None",
249 "Black & White",
250 "Sepia",
251 "Negative",
252 "Emboss",
253 "Sketch",
064f5096
KD		 254 "Sky Blue",
255 "Grass Green",
256 "Skin Whiten",
0996517c 257 "Vivid",
6491d1ad
SN		 258 "Aqua",
259 "Art Freeze",
260 "Silhouette",
261 "Solarization",
262 "Antique",
263 "Set Cb/Cr",
0996517c
HV		 264 NULL
265 };
e40a0573
SN		 266 static const char * const auto_n_preset_white_balance[] = {
267 "Manual",
268 "Auto",
269 "Incandescent",
270 "Fluorescent",
271 "Fluorescent H",
272 "Horizon",
273 "Daylight",
274 "Flash",
275 "Cloudy",
276 "Shade",
277 NULL,
278 };
7f84ad8b
SN		 279 static const char * const camera_iso_sensitivity_auto[] = {
280 "Manual",
281 "Auto",
282 NULL
283 };
0bf6b7dc
SN		 284 static const char * const scene_mode[] = {
285 "None",
286 "Backlight",
287 "Beach/Snow",
288 "Candle Light",
289 "Dusk/Dawn",
290 "Fall Colors",
291 "Fireworks",
292 "Landscape",
293 "Night",
294 "Party/Indoor",
295 "Portrait",
296 "Sports",
297 "Sunset",
298 "Text",
299 NULL
300 };
aec330a8
AS		 301 static const char * const tune_emphasis[] = {
302 "None",
f769c260
HV		 303 "50 Microseconds",
304 "75 Microseconds",
0996517c
HV		 305 NULL,
306 };
064f5096
KD		 307 static const char * const header_mode[] = {
308 "Separate Buffer",
309 "Joined With 1st Frame",
310 NULL,
311 };
312 static const char * const multi_slice[] = {
313 "Single",
314 "Max Macroblocks",
315 "Max Bytes",
316 NULL,
317 };
318 static const char * const entropy_mode[] = {
319 "CAVLC",
320 "CABAC",
321 NULL,
322 };
323 static const char * const mpeg_h264_level[] = {
324 "1",
325 "1b",
326 "1.1",
327 "1.2",
328 "1.3",
329 "2",
330 "2.1",
331 "2.2",
332 "3",
333 "3.1",
334 "3.2",
335 "4",
336 "4.1",
337 "4.2",
338 "5",
339 "5.1",
340 NULL,
341 };
342 static const char * const h264_loop_filter[] = {
343 "Enabled",
344 "Disabled",
345 "Disabled at Slice Boundary",
346 NULL,
347 };
348 static const char * const h264_profile[] = {
349 "Baseline",
350 "Constrained Baseline",
351 "Main",
352 "Extended",
353 "High",
354 "High 10",
355 "High 422",
356 "High 444 Predictive",
357 "High 10 Intra",
358 "High 422 Intra",
359 "High 444 Intra",
360 "CAVLC 444 Intra",
361 "Scalable Baseline",
362 "Scalable High",
363 "Scalable High Intra",
364 "Multiview High",
365 NULL,
366 };
367 static const char * const vui_sar_idc[] = {
368 "Unspecified",
369 "1:1",
370 "12:11",
371 "10:11",
372 "16:11",
373 "40:33",
374 "24:11",
375 "20:11",
376 "32:11",
377 "80:33",
378 "18:11",
379 "15:11",
380 "64:33",
381 "160:99",
382 "4:3",
383 "3:2",
384 "2:1",
385 "Extended SAR",
386 NULL,
387 };
2e81dde9
AK		 388 static const char * const h264_fp_arrangement_type[] = {
389 "Checkerboard",
390 "Column",
391 "Row",
392 "Side by Side",
393 "Top Bottom",
394 "Temporal",
395 NULL,
396 };
397 static const char * const h264_fmo_map_type[] = {
398 "Interleaved Slices",
399 "Scattered Slices",
400 "Foreground with Leftover",
401 "Box Out",
402 "Raster Scan",
403 "Wipe Scan",
404 "Explicit",
405 NULL,
406 };
064f5096
KD		 407 static const char * const mpeg_mpeg4_level[] = {
408 "0",
409 "0b",
410 "1",
411 "2",
412 "3",
413 "3b",
414 "4",
415 "5",
416 NULL,
417 };
418 static const char * const mpeg4_profile[] = {
419 "Simple",
f769c260 420 "Advanced Simple",
064f5096
KD		 421 "Core",
422 "Simple Scalable",
39c1cb2b 423 "Advanced Coding Efficiency",
064f5096
KD		 424 NULL,
425 };
426
bc9028e1
AK		 427 static const char * const vpx_golden_frame_sel[] = {
428 "Use Previous Frame",
429 "Use Previous Specific Frame",
430 NULL,
431 };
432
0b159acd
SA		 433 static const char * const flash_led_mode[] = {
434 "Off",
435 "Flash",
436 "Torch",
437 NULL,
438 };
439 static const char * const flash_strobe_source[] = {
440 "Software",
441 "External",
442 NULL,
443 };
0996517c 444
c7361ae1
SN		 445 static const char * const jpeg_chroma_subsampling[] = {
446 "4:4:4",
447 "4:2:2",
448 "4:2:0",
449 "4:1:1",
450 "4:1:0",
451 "Gray",
452 NULL,
453 };
977ebec7
HV		 454 static const char * const dv_tx_mode[] = {
455 "DVI-D",
456 "HDMI",
457 NULL,
458 };
459 static const char * const dv_rgb_range[] = {
460 "Automatic",
461 "RGB limited range (16-235)",
462 "RGB full range (0-255)",
463 NULL,
464 };
a77b4fc0
HV		 465 static const char * const detect_md_mode[] = {
466 "Disabled",
467 "Global",
468 "Threshold Grid",
469 "Region Grid",
470 NULL,
471 };
977ebec7 472
c7361ae1 473
0996517c
HV		 474 switch (id) {
475 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
476 return mpeg_audio_sampling_freq;
477 case V4L2_CID_MPEG_AUDIO_ENCODING:
478 return mpeg_audio_encoding;
479 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
480 return mpeg_audio_l1_bitrate;
481 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
482 return mpeg_audio_l2_bitrate;
483 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
484 return mpeg_audio_l3_bitrate;
485 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
486 return mpeg_audio_ac3_bitrate;
487 case V4L2_CID_MPEG_AUDIO_MODE:
488 return mpeg_audio_mode;
489 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
490 return mpeg_audio_mode_extension;
491 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
492 return mpeg_audio_emphasis;
493 case V4L2_CID_MPEG_AUDIO_CRC:
494 return mpeg_audio_crc;
24c19a21
HV		 495 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
496 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
497 return mpeg_audio_dec_playback;
0996517c
HV		 498 case V4L2_CID_MPEG_VIDEO_ENCODING:
499 return mpeg_video_encoding;
500 case V4L2_CID_MPEG_VIDEO_ASPECT:
501 return mpeg_video_aspect;
502 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
503 return mpeg_video_bitrate_mode;
504 case V4L2_CID_MPEG_STREAM_TYPE:
505 return mpeg_stream_type;
506 case V4L2_CID_MPEG_STREAM_VBI_FMT:
507 return mpeg_stream_vbi_fmt;
508 case V4L2_CID_POWER_LINE_FREQUENCY:
509 return camera_power_line_frequency;
510 case V4L2_CID_EXPOSURE_AUTO:
511 return camera_exposure_auto;
cf072139
SN		 512 case V4L2_CID_EXPOSURE_METERING:
513 return camera_exposure_metering;
2272ab65
SN		 514 case V4L2_CID_AUTO_FOCUS_RANGE:
515 return camera_auto_focus_range;
0996517c
HV		 516 case V4L2_CID_COLORFX:
517 return colorfx;
e40a0573
SN		 518 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
519 return auto_n_preset_white_balance;
7f84ad8b
SN		 520 case V4L2_CID_ISO_SENSITIVITY_AUTO:
521 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 522 case V4L2_CID_SCENE_MODE:
523 return scene_mode;
0996517c 524 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 525 return tune_emphasis;
526 case V4L2_CID_TUNE_DEEMPHASIS:
527 return tune_emphasis;
0b159acd
SA		 528 case V4L2_CID_FLASH_LED_MODE:
529 return flash_led_mode;
530 case V4L2_CID_FLASH_STROBE_SOURCE:
531 return flash_strobe_source;
064f5096
KD		 532 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
533 return header_mode;
534 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
535 return multi_slice;
536 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
537 return entropy_mode;
538 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
539 return mpeg_h264_level;
540 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
541 return h264_loop_filter;
542 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
543 return h264_profile;
544 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
545 return vui_sar_idc;
2e81dde9
AK		 546 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
547 return h264_fp_arrangement_type;
548 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
549 return h264_fmo_map_type;
064f5096
KD		 550 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
551 return mpeg_mpeg4_level;
552 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
553 return mpeg4_profile;
bc9028e1
AK		 554 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
555 return vpx_golden_frame_sel;
c7361ae1
SN		 556 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
557 return jpeg_chroma_subsampling;
977ebec7
HV		 558 case V4L2_CID_DV_TX_MODE:
559 return dv_tx_mode;
560 case V4L2_CID_DV_TX_RGB_RANGE:
561 case V4L2_CID_DV_RX_RGB_RANGE:
562 return dv_rgb_range;
a77b4fc0
HV		 563 case V4L2_CID_DETECT_MD_MODE:
564 return detect_md_mode;
c7361ae1 565
0996517c
HV		 566 default:
567 return NULL;
568 }
569}
570EXPORT_SYMBOL(v4l2_ctrl_get_menu);
571
bc9028e1 572#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 573/*
574 * Returns NULL or an s64 type array containing the menu for given
575 * control ID. The total number of the menu items is returned in @len.
576 */
4eed9b33 577const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 578{
4eed9b33 579 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 580 1, 2, 4, 8,
581 };
582
4eed9b33 583 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 584 1, 2, 3,
585 };
586
d1e9b7c1 587 switch (id) {
bc9028e1
AK		 588 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
589 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
590 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
591 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 592 default:
593 *len = 0;
594 return NULL;
2028c71d 595 }
d1e9b7c1
SN		 596}
597EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
598
0996517c
HV		 599/* Return the control name. */
600const char *v4l2_ctrl_get_name(u32 id)
601{
602 switch (id) {
603 /* USER controls */
59253f29 604 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 605 case V4L2_CID_USER_CLASS: return "User Controls";
606 case V4L2_CID_BRIGHTNESS: return "Brightness";
607 case V4L2_CID_CONTRAST: return "Contrast";
608 case V4L2_CID_SATURATION: return "Saturation";
609 case V4L2_CID_HUE: return "Hue";
610 case V4L2_CID_AUDIO_VOLUME: return "Volume";
611 case V4L2_CID_AUDIO_BALANCE: return "Balance";
612 case V4L2_CID_AUDIO_BASS: return "Bass";
613 case V4L2_CID_AUDIO_TREBLE: return "Treble";
614 case V4L2_CID_AUDIO_MUTE: return "Mute";
615 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 616 case V4L2_CID_BLACK_LEVEL: return "Black Level";
617 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
618 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
619 case V4L2_CID_RED_BALANCE: return "Red Balance";
620 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
621 case V4L2_CID_GAMMA: return "Gamma";
622 case V4L2_CID_EXPOSURE: return "Exposure";
623 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
624 case V4L2_CID_GAIN: return "Gain";
625 case V4L2_CID_HFLIP: return "Horizontal Flip";
626 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 627 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
628 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
629 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
630 case V4L2_CID_SHARPNESS: return "Sharpness";
631 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
632 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 633 case V4L2_CID_COLOR_KILLER: return "Color Killer";
634 case V4L2_CID_COLORFX: return "Color Effects";
635 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
636 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
637 case V4L2_CID_ROTATE: return "Rotate";
638 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 639 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 640 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
641 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 642 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
643 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 644 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 645 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 646
bc9028e1
AK		 647 /* Codec controls */
648 /* The MPEG controls are applicable to all codec controls
649 * and the 'MPEG' part of the define is historical */
6c8d6111 650 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 651 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 652 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
653 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
654 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
655 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
656 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 657 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
658 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
659 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 660 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 661 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
662 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
663 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
664 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
665 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 666 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 667 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
668 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
669 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
670 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
671 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 672 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
673 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 674 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
675 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
676 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
677 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
678 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
679 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
680 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
681 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
682 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 683 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 684 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 685 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 686 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
687 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 688 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 689 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
690 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
691 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 692 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 693 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 694 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
695 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 696 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
697 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
698 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 699 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
700 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 701 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
702 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
703 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
704 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 705 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
706 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 707 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
708 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
709 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
710 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
711 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
712 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
713 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
714 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
715 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 716 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
717 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
718 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
719 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
720 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
721 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
722 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
723 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
724 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
725 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
726 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
727 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
728 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
729 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
730 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
731 return "H264 Set QP Value for HC Layers";
064f5096 732 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 733 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
734 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 735 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
736 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
737 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
738 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
739 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 740 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
741 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
742 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 743 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 744 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
745 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 746 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 747 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
748 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 749 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
0996517c 750
bc9028e1
AK		 751 /* VPX controls */
752 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
753 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
754 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
755 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
756 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
757 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
758 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 759 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
760 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
761 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
762 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 763 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 764
0996517c 765 /* CAMERA controls */
59253f29 766 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 767 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
768 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
769 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
770 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
771 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
772 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
773 case V4L2_CID_PAN_RESET: return "Pan, Reset";
774 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
775 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
776 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
777 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
778 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 779 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 780 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
781 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
782 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
783 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 784 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
785 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 786 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 787 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 788 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 789 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 790 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
791 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 792 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 793 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 794 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 795 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
796 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
797 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
798 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 799 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
800 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 801
59253f29
HV		 802 /* FM Radio Modulator controls */
803 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 804 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
805 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
806 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
807 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
808 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
809 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 810 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
811 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
812 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
813 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
814 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
815 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
816 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
817 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
818 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 819 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
820 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
821 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 822 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 823 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
824 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
825 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
826 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
827 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
828 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
829 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 830 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 831 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
832 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
833
0b159acd 834 /* Flash controls */
59253f29 835 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 836 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
837 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
838 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 839 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 840 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
841 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
842 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
843 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
844 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
845 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 846 case V4L2_CID_FLASH_FAULT: return "Faults";
847 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 848 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 849
c7361ae1 850 /* JPEG encoder controls */
59253f29 851 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 852 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
853 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
854 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
855 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
856 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
857
8c9d236e 858 /* Image source controls */
59253f29 859 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 860 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
861 case V4L2_CID_VBLANK: return "Vertical Blanking";
862 case V4L2_CID_HBLANK: return "Horizontal Blanking";
863 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 864 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
865 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
866 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
867 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 868
c643ee13 869 /* Image processing controls */
59253f29 870 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 871 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
872 case V4L2_CID_LINK_FREQ: return "Link Frequency";
873 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 874 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 875
977ebec7 876 /* DV controls */
59253f29 877 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 878 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
879 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
880 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
881 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
882 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
883 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
884 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
885 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
886
aec330a8
AS		 887 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
888 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
889 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad
AP		 890 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
891 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
892 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
893 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
894 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
895 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
896 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 897 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
898 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 899 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 900 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
901 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
902 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
903 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
904 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
905 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 906
907 /* Detection controls */
908 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
909 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
910 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
911 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
912 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
913 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 914 default:
915 return NULL;
916 }
917}
918EXPORT_SYMBOL(v4l2_ctrl_get_name);
919
920void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 921 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 922{
923 *name = v4l2_ctrl_get_name(id);
924 *flags = 0;
925
926 switch (id) {
927 case V4L2_CID_AUDIO_MUTE:
928 case V4L2_CID_AUDIO_LOUDNESS:
929 case V4L2_CID_AUTO_WHITE_BALANCE:
930 case V4L2_CID_AUTOGAIN:
931 case V4L2_CID_HFLIP:
932 case V4L2_CID_VFLIP:
933 case V4L2_CID_HUE_AUTO:
934 case V4L2_CID_CHROMA_AGC:
935 case V4L2_CID_COLOR_KILLER:
a2f8b84f 936 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 937 case V4L2_CID_MPEG_AUDIO_MUTE:
938 case V4L2_CID_MPEG_VIDEO_MUTE:
939 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
940 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
941 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
942 case V4L2_CID_FOCUS_AUTO:
943 case V4L2_CID_PRIVACY:
944 case V4L2_CID_AUDIO_LIMITER_ENABLED:
945 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
946 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 947 case V4L2_CID_ILLUMINATORS_1:
948 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 949 case V4L2_CID_FLASH_STROBE_STATUS:
950 case V4L2_CID_FLASH_CHARGE:
951 case V4L2_CID_FLASH_READY:
064f5096
KD		 952 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
953 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
954 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
955 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
956 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
957 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
958 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 959 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 960 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 961 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 962 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 963 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
964 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
965 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 966 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 967 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 968 case V4L2_CID_RDS_TX_MONO_STEREO:
969 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
970 case V4L2_CID_RDS_TX_COMPRESSED:
971 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
972 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
973 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
974 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
975 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 976 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
977 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
978 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 979 *type = V4L2_CTRL_TYPE_BOOLEAN;
980 *min = 0;
981 *max = *step = 1;
982 break;
bf0bedd3
AG		 983 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
984 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
985 *type = V4L2_CTRL_TYPE_INTEGER;
986 break;
0996517c
HV		 987 case V4L2_CID_PAN_RESET:
988 case V4L2_CID_TILT_RESET:
0b159acd
SA		 989 case V4L2_CID_FLASH_STROBE:
990 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 991 case V4L2_CID_AUTO_FOCUS_START:
992 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 993 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RR		 994 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
995 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 996 *min = *max = *step = *def = 0;
997 break;
998 case V4L2_CID_POWER_LINE_FREQUENCY:
999 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1000 case V4L2_CID_MPEG_AUDIO_ENCODING:
1001 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1002 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1003 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1004 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1005 case V4L2_CID_MPEG_AUDIO_MODE:
1006 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1007 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1008 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1009 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1010 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1011 case V4L2_CID_MPEG_VIDEO_ENCODING:
1012 case V4L2_CID_MPEG_VIDEO_ASPECT:
1013 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1014 case V4L2_CID_MPEG_STREAM_TYPE:
1015 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1016 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1017 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1018 case V4L2_CID_COLORFX:
e40a0573 1019 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1020 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1021 case V4L2_CID_FLASH_LED_MODE:
1022 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1023 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1024 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1025 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1026 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1027 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1028 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1029 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1030 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1031 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1032 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1033 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1034 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1035 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1036 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1037 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1038 case V4L2_CID_DV_TX_MODE:
1039 case V4L2_CID_DV_TX_RGB_RANGE:
1040 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 1041 case V4L2_CID_TEST_PATTERN:
aec330a8 1042 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1043 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
a77b4fc0 1044 case V4L2_CID_DETECT_MD_MODE:
0996517c
HV		 1045 *type = V4L2_CTRL_TYPE_MENU;
1046 break;
c643ee13
SA		 1047 case V4L2_CID_LINK_FREQ:
1048 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1049 break;
0996517c
HV		 1050 case V4L2_CID_RDS_TX_PS_NAME:
1051 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1052 case V4L2_CID_RDS_RX_PS_NAME:
1053 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1054 *type = V4L2_CTRL_TYPE_STRING;
1055 break;
7f84ad8b 1056 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1057 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1058 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1059 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1060 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1061 break;
0996517c
HV		 1062 case V4L2_CID_USER_CLASS:
1063 case V4L2_CID_CAMERA_CLASS:
1064 case V4L2_CID_MPEG_CLASS:
1065 case V4L2_CID_FM_TX_CLASS:
0b159acd 1066 case V4L2_CID_FLASH_CLASS:
c7361ae1 1067 case V4L2_CID_JPEG_CLASS:
8c9d236e 1068 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1069 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1070 case V4L2_CID_DV_CLASS:
aec330a8 1071 case V4L2_CID_FM_RX_CLASS:
80807fad 1072 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1073 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1074 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1075 /* You can neither read not write these */
1076 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1077 *min = *max = *step = *def = 0;
1078 break;
1079 case V4L2_CID_BG_COLOR:
1080 *type = V4L2_CTRL_TYPE_INTEGER;
1081 *step = 1;
1082 *min = 0;
1083 /* Max is calculated as RGB888 that is 2^24 */
1084 *max = 0xFFFFFF;
1085 break;
0b159acd 1086 case V4L2_CID_FLASH_FAULT:
c7361ae1 1087 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1088 case V4L2_CID_3A_LOCK:
2272ab65 1089 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1090 case V4L2_CID_DV_TX_HOTPLUG:
1091 case V4L2_CID_DV_TX_RXSENSE:
1092 case V4L2_CID_DV_TX_EDID_PRESENT:
1093 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1094 *type = V4L2_CTRL_TYPE_BITMASK;
1095 break;
064f5096
KD		 1096 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1097 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1098 *type = V4L2_CTRL_TYPE_INTEGER;
1099 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1100 break;
24c19a21 1101 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1102 *type = V4L2_CTRL_TYPE_INTEGER64;
1103 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1104 *min = *def = 0;
1105 *max = 0x1ffffffffLL;
1106 *step = 1;
1107 break;
1108 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1109 *type = V4L2_CTRL_TYPE_INTEGER64;
1110 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1111 *min = *def = 0;
1112 *max = 0x7fffffffffffffffLL;
1113 *step = 1;
1114 break;
c643ee13 1115 case V4L2_CID_PIXEL_RATE:
24c19a21 1116 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1117 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1118 break;
a77b4fc0
HV		 1119 case V4L2_CID_DETECT_MD_REGION_GRID:
1120 *type = V4L2_CTRL_TYPE_U8;
1121 break;
1122 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1123 *type = V4L2_CTRL_TYPE_U16;
1124 break;
811c5081
HV		 1125 case V4L2_CID_RDS_TX_ALT_FREQS:
1126 *type = V4L2_CTRL_TYPE_U32;
1127 break;
0996517c
HV		 1128 default:
1129 *type = V4L2_CTRL_TYPE_INTEGER;
1130 break;
1131 }
1132 switch (id) {
1133 case V4L2_CID_MPEG_AUDIO_ENCODING:
1134 case V4L2_CID_MPEG_AUDIO_MODE:
1135 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1136 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1137 case V4L2_CID_MPEG_STREAM_TYPE:
1138 *flags |= V4L2_CTRL_FLAG_UPDATE;
1139 break;
1140 case V4L2_CID_AUDIO_VOLUME:
1141 case V4L2_CID_AUDIO_BALANCE:
1142 case V4L2_CID_AUDIO_BASS:
1143 case V4L2_CID_AUDIO_TREBLE:
1144 case V4L2_CID_BRIGHTNESS:
1145 case V4L2_CID_CONTRAST:
1146 case V4L2_CID_SATURATION:
1147 case V4L2_CID_HUE:
1148 case V4L2_CID_RED_BALANCE:
1149 case V4L2_CID_BLUE_BALANCE:
1150 case V4L2_CID_GAMMA:
1151 case V4L2_CID_SHARPNESS:
1152 case V4L2_CID_CHROMA_GAIN:
1153 case V4L2_CID_RDS_TX_DEVIATION:
1154 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1155 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1156 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1157 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1158 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1159 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1160 case V4L2_CID_PILOT_TONE_DEVIATION:
1161 case V4L2_CID_PILOT_TONE_FREQUENCY:
1162 case V4L2_CID_TUNE_POWER_LEVEL:
1163 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
80807fad
AP		 1164 case V4L2_CID_RF_TUNER_LNA_GAIN:
1165 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1166 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1167 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1168 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1169 *flags |= V4L2_CTRL_FLAG_SLIDER;
1170 break;
1171 case V4L2_CID_PAN_RELATIVE:
1172 case V4L2_CID_TILT_RELATIVE:
1173 case V4L2_CID_FOCUS_RELATIVE:
1174 case V4L2_CID_IRIS_RELATIVE:
1175 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RR		 1176 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1177 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1178 break;
0b159acd 1179 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1180 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1181 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1182 case V4L2_CID_DV_TX_HOTPLUG:
1183 case V4L2_CID_DV_TX_RXSENSE:
1184 case V4L2_CID_DV_TX_EDID_PRESENT:
1185 case V4L2_CID_DV_RX_POWER_PRESENT:
9570a148
HV		 1186 case V4L2_CID_RDS_RX_PTY:
1187 case V4L2_CID_RDS_RX_PS_NAME:
1188 case V4L2_CID_RDS_RX_RADIO_TEXT:
1189 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1190 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1191 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1192 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1193 break;
9aa4357e
AP		 1194 case V4L2_CID_RF_TUNER_PLL_LOCK:
1195 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1196 break;
0996517c
HV		 1197 }
1198}
1199EXPORT_SYMBOL(v4l2_ctrl_fill);
1200
6e239399
HV		 1201static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1202{
1203 memset(ev->reserved, 0, sizeof(ev->reserved));
1204 ev->type = V4L2_EVENT_CTRL;
1205 ev->id = ctrl->id;
1206 ev->u.ctrl.changes = changes;
1207 ev->u.ctrl.type = ctrl->type;
1208 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1209 if (ctrl->is_ptr)
6e239399
HV		 1210 ev->u.ctrl.value64 = 0;
1211 else
2a9ec373 1212 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1213 ev->u.ctrl.minimum = ctrl->minimum;
1214 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1215 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1216 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1217 ev->u.ctrl.step = 1;
1218 else
1219 ev->u.ctrl.step = ctrl->step;
1220 ev->u.ctrl.default_value = ctrl->default_value;
1221}
1222
1223static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1224{
1225 struct v4l2_event ev;
77068d36 1226 struct v4l2_subscribed_event *sev;
6e239399 1227
77068d36 1228 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1229 return;
6e239399
HV		 1230 fill_event(&ev, ctrl, changes);
1231
77068d36 1232 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1233 if (sev->fh != fh ||
1234 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1235 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1236}
1237
998e7659 1238static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1239 union v4l2_ctrl_ptr ptr1,
1240 union v4l2_ctrl_ptr ptr2)
1241{
1242 switch (ctrl->type) {
1243 case V4L2_CTRL_TYPE_BUTTON:
1244 return false;
1245 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1246 idx *= ctrl->elem_size;
0176077a 1247 /* strings are always 0-terminated */
265c7f8a 1248 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1249 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1250 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1251 case V4L2_CTRL_TYPE_U8:
1252 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1253 case V4L2_CTRL_TYPE_U16:
1254 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1255 case V4L2_CTRL_TYPE_U32:
1256 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1257 default:
265c7f8a
HV		 1258 if (ctrl->is_int)
1259 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1260 idx *= ctrl->elem_size;
1261 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1262 }
1263}
1264
998e7659 1265static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1266 union v4l2_ctrl_ptr ptr)
1267{
1268 switch (ctrl->type) {
1269 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1270 idx *= ctrl->elem_size;
1271 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1272 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1273 break;
1274 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1275 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1276 break;
1277 case V4L2_CTRL_TYPE_INTEGER:
1278 case V4L2_CTRL_TYPE_INTEGER_MENU:
1279 case V4L2_CTRL_TYPE_MENU:
1280 case V4L2_CTRL_TYPE_BITMASK:
1281 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1282 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1283 break;
dda4a4d5
HV		 1284 case V4L2_CTRL_TYPE_U8:
1285 ptr.p_u8[idx] = ctrl->default_value;
1286 break;
1287 case V4L2_CTRL_TYPE_U16:
1288 ptr.p_u16[idx] = ctrl->default_value;
1289 break;
811c5081
HV		 1290 case V4L2_CTRL_TYPE_U32:
1291 ptr.p_u32[idx] = ctrl->default_value;
1292 break;
0176077a 1293 default:
302ab7ce
HV		 1294 idx *= ctrl->elem_size;
1295 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1296 break;
1297 }
1298}
1299
1300static void std_log(const struct v4l2_ctrl *ctrl)
1301{
1302 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1303
998e7659
HV		 1304 if (ctrl->is_array) {
1305 unsigned i;
1306
1307 for (i = 0; i < ctrl->nr_of_dims; i++)
1308 pr_cont("[%u]", ctrl->dims[i]);
1309 pr_cont(" ");
1310 }
1311
0176077a
HV		 1312 switch (ctrl->type) {
1313 case V4L2_CTRL_TYPE_INTEGER:
1314 pr_cont("%d", *ptr.p_s32);
1315 break;
1316 case V4L2_CTRL_TYPE_BOOLEAN:
1317 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1318 break;
1319 case V4L2_CTRL_TYPE_MENU:
1320 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1321 break;
1322 case V4L2_CTRL_TYPE_INTEGER_MENU:
1323 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1324 break;
1325 case V4L2_CTRL_TYPE_BITMASK:
1326 pr_cont("0x%08x", *ptr.p_s32);
1327 break;
1328 case V4L2_CTRL_TYPE_INTEGER64:
1329 pr_cont("%lld", *ptr.p_s64);
1330 break;
1331 case V4L2_CTRL_TYPE_STRING:
1332 pr_cont("%s", ptr.p_char);
1333 break;
dda4a4d5
HV		 1334 case V4L2_CTRL_TYPE_U8:
1335 pr_cont("%u", (unsigned)*ptr.p_u8);
1336 break;
1337 case V4L2_CTRL_TYPE_U16:
1338 pr_cont("%u", (unsigned)*ptr.p_u16);
1339 break;
811c5081
HV		 1340 case V4L2_CTRL_TYPE_U32:
1341 pr_cont("%u", (unsigned)*ptr.p_u32);
1342 break;
0176077a
HV		 1343 default:
1344 pr_cont("unknown type %d", ctrl->type);
1345 break;
1346 }
1347}
1348
958c7c7e
HV		 1349/*
1350 * Round towards the closest legal value. Be careful when we are
1351 * close to the maximum range of the control type to prevent
1352 * wrap-arounds.
1353 */
0176077a
HV		 1354#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1355({ \
1356 offset_type offset; \
958c7c7e 1357 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1358 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1359 val = (ctrl)->maximum; \
1360 else \
9c9cb1fa 1361 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1362 val = clamp_t(typeof(val), val, \
1363 (ctrl)->minimum, (ctrl)->maximum); \
1364 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1365 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1366 val = (ctrl)->minimum + offset; \
1367 0; \
1368})
1369
1370/* Validate a new control */
998e7659 1371static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1372 union v4l2_ctrl_ptr ptr)
1373{
1374 size_t len;
0d5e8c43
HV		 1375 u64 offset;
1376 s64 val;
0176077a
HV		 1377
1378 switch (ctrl->type) {
1379 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1380 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1381 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1382 /*
1383 * We can't use the ROUND_TO_RANGE define here due to
1384 * the u64 divide that needs special care.
1385 */
1386 val = ptr.p_s64[idx];
9c9cb1fa 1387 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1388 val = ctrl->maximum;
1389 else
9c9cb1fa 1390 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1391 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1392 offset = val - ctrl->minimum;
1393 do_div(offset, ctrl->step);
1394 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1395 return 0;
dda4a4d5
HV		 1396 case V4L2_CTRL_TYPE_U8:
1397 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1398 case V4L2_CTRL_TYPE_U16:
1399 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1400 case V4L2_CTRL_TYPE_U32:
1401 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1402
1403 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1404 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1405 return 0;
1406
1407 case V4L2_CTRL_TYPE_MENU:
1408 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1409 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1410 return -ERANGE;
265c7f8a 1411 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1412 return -EINVAL;
1413 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1414 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1415 return -EINVAL;
1416 return 0;
1417
1418 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1419 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1420 return 0;
1421
1422 case V4L2_CTRL_TYPE_BUTTON:
1423 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1424 ptr.p_s32[idx] = 0;
0176077a
HV		 1425 return 0;
1426
1427 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1428 idx *= ctrl->elem_size;
1429 len = strlen(ptr.p_char + idx);
0176077a
HV		 1430 if (len < ctrl->minimum)
1431 return -ERANGE;
0d5e8c43 1432 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1433 return -ERANGE;
1434 return 0;
1435
1436 default:
1437 return -EINVAL;
1438 }
1439}
1440
1441static const struct v4l2_ctrl_type_ops std_type_ops = {
1442 .equal = std_equal,
1443 .init = std_init,
1444 .log = std_log,
1445 .validate = std_validate,
1446};
1447
000e4f9a
HV		 1448/* Helper function: copy the given control value back to the caller */
1449static int ptr_to_user(struct v4l2_ext_control *c,
1450 struct v4l2_ctrl *ctrl,
1451 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1452{
1453 u32 len;
1454
d9a25471 1455 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1456 return copy_to_user(c->ptr, ptr.p, c->size) ?
1457 -EFAULT : 0;
d9a25471 1458
0996517c
HV		 1459 switch (ctrl->type) {
1460 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1461 len = strlen(ptr.p_char);
0996517c 1462 if (c->size < len + 1) {
c336f75e 1463 c->size = ctrl->elem_size;
0996517c
HV		 1464 return -ENOSPC;
1465 }
000e4f9a 1466 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1467 -EFAULT : 0;
0996517c 1468 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1469 c->value64 = *ptr.p_s64;
0996517c
HV		 1470 break;
1471 default:
000e4f9a 1472 c->value = *ptr.p_s32;
0996517c
HV		 1473 break;
1474 }
1475 return 0;
1476}
1477
000e4f9a
HV		 1478/* Helper function: copy the current control value back to the caller */
1479static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1480 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1481{
1482 return ptr_to_user(c, ctrl, ctrl->p_cur);
1483}
1484
1485/* Helper function: copy the new control value back to the caller */
1486static int new_to_user(struct v4l2_ext_control *c,
1487 struct v4l2_ctrl *ctrl)
1488{
1489 return ptr_to_user(c, ctrl, ctrl->p_new);
1490}
1491
1492/* Helper function: copy the caller-provider value to the given control value */
1493static int user_to_ptr(struct v4l2_ext_control *c,
1494 struct v4l2_ctrl *ctrl,
1495 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1496{
1497 int ret;
1498 u32 size;
1499
2a863793 1500 ctrl->is_new = 1;
302ab7ce
HV		 1501 if (ctrl->is_ptr && !ctrl->is_string) {
1502 unsigned idx;
1503
40265bbe 1504 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1505 if (ret || !ctrl->is_array)
1506 return ret;
1507 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1508 ctrl->type_ops->init(ctrl, idx, ptr);
1509 return 0;
1510 }
d9a25471 1511
0996517c
HV		 1512 switch (ctrl->type) {
1513 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1514 *ptr.p_s64 = c->value64;
0996517c
HV		 1515 break;
1516 case V4L2_CTRL_TYPE_STRING:
1517 size = c->size;
1518 if (size == 0)
1519 return -ERANGE;
1520 if (size > ctrl->maximum + 1)
1521 size = ctrl->maximum + 1;
40265bbe 1522 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1523 if (!ret) {
000e4f9a 1524 char last = ptr.p_char[size - 1];
0996517c 1525
000e4f9a 1526 ptr.p_char[size - 1] = 0;
0996517c
HV		 1527 /* If the string was longer than ctrl->maximum,
1528 then return an error. */
000e4f9a 1529 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1530 return -ERANGE;
1531 }
40265bbe 1532 return ret;
0996517c 1533 default:
000e4f9a 1534 *ptr.p_s32 = c->value;
0996517c
HV		 1535 break;
1536 }
1537 return 0;
1538}
1539
000e4f9a
HV		 1540/* Helper function: copy the caller-provider value as the new control value */
1541static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1542 struct v4l2_ctrl *ctrl)
1543{
000e4f9a
HV		 1544 return user_to_ptr(c, ctrl, ctrl->p_new);
1545}
d9a25471 1546
000e4f9a
HV		 1547/* Copy the one value to another. */
1548static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1549 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1550{
1551 if (ctrl == NULL)
1552 return;
302ab7ce 1553 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1554}
1555
1556/* Copy the new value to the current value. */
2ccbe779 1557static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1558{
000e4f9a 1559 bool changed;
6e239399 1560
0996517c
HV		 1561 if (ctrl == NULL)
1562 return;
9ea1b7a4
HV		 1563
1564 /* has_changed is set by cluster_changed */
1565 changed = ctrl->has_changed;
1566 if (changed)
1567 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1568
2ccbe779
SN		 1569 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1570 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1571 ctrl->flags &=
1572 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1573 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1574 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1575 if (ctrl->cluster[0]->has_volatiles)
1576 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1577 }
1249a3a8 1578 fh = NULL;
72d877ca 1579 }
2ccbe779 1580 if (changed || ch_flags) {
639884a6
HV		 1581 /* If a control was changed that was not one of the controls
1582 modified by the application, then send the event to all. */
1583 if (!ctrl->is_new)
1584 fh = NULL;
6e239399 1585 send_event(fh, ctrl,
2ccbe779 1586 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1587 if (ctrl->call_notify && changed && ctrl->handler->notify)
1588 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1589 }
0996517c
HV		 1590}
1591
1592/* Copy the current value to the new value */
1593static void cur_to_new(struct v4l2_ctrl *ctrl)
1594{
1595 if (ctrl == NULL)
1596 return;
000e4f9a 1597 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1598}
1599
1600/* Return non-zero if one or more of the controls in the cluster has a new
1601 value that differs from the current value. */
1602static int cluster_changed(struct v4l2_ctrl *master)
1603{
9ea1b7a4 1604 bool changed = false;
302ab7ce 1605 unsigned idx;
0996517c
HV		 1606 int i;
1607
9ea1b7a4 1608 for (i = 0; i < master->ncontrols; i++) {
0996517c 1609 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1610 bool ctrl_changed = false;
0996517c
HV		 1611
1612 if (ctrl == NULL)
1613 continue;
45f014c5
RR		 1614
1615 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1616 changed = ctrl_changed = true;
1617
b08d8d26
RR		 1618 /*
1619 * Set has_changed to false to avoid generating
1620 * the event V4L2_EVENT_CTRL_CH_VALUE
1621 */
1622 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1623 ctrl->has_changed = false;
1624 continue;
1625 }
1626
302ab7ce
HV		 1627 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1628 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1629 ctrl->p_cur, ctrl->p_new);
302ab7ce 1630 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1631 changed |= ctrl->has_changed;
0996517c 1632 }
9ea1b7a4 1633 return changed;
0996517c
HV		 1634}
1635
2ccbe779
SN		 1636/* Control range checking */
1637static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1638 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1639{
1640 switch (type) {
1641 case V4L2_CTRL_TYPE_BOOLEAN:
1642 if (step != 1 || max > 1 || min < 0)
1643 return -ERANGE;
1644 /* fall through */
dda4a4d5
HV		 1645 case V4L2_CTRL_TYPE_U8:
1646 case V4L2_CTRL_TYPE_U16:
811c5081 1647 case V4L2_CTRL_TYPE_U32:
2ccbe779 1648 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1649 case V4L2_CTRL_TYPE_INTEGER64:
1650 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1651 return -ERANGE;
1652 return 0;
1653 case V4L2_CTRL_TYPE_BITMASK:
1654 if (step || min || !max || (def & ~max))
1655 return -ERANGE;
1656 return 0;
1657 case V4L2_CTRL_TYPE_MENU:
1658 case V4L2_CTRL_TYPE_INTEGER_MENU:
1659 if (min > max || def < min || def > max)
1660 return -ERANGE;
1661 /* Note: step == menu_skip_mask for menu controls.
1662 So here we check if the default value is masked out. */
1663 if (step && ((1 << def) & step))
1664 return -EINVAL;
1665 return 0;
1666 case V4L2_CTRL_TYPE_STRING:
1667 if (min > max || min < 0 || step < 1 || def)
1668 return -ERANGE;
1669 return 0;
1670 default:
1671 return 0;
1672 }
1673}
1674
03d5285b 1675/* Validate a new control */
7a7f1ab3 1676static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1677{
302ab7ce
HV		 1678 unsigned idx;
1679 int err = 0;
1680
7a7f1ab3
HV		 1681 for (idx = 0; !err && idx < ctrl->elems; idx++)
1682 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1683 return err;
0996517c
HV		 1684}
1685
1686static inline u32 node2id(struct list_head *node)
1687{
1688 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1689}
1690
1691/* Set the handler's error code if it wasn't set earlier already */
1692static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1693{
1694 if (hdl->error == 0)
1695 hdl->error = err;
1696 return err;
1697}
1698
1699/* Initialize the handler */
6cd247ef
AW		 1700int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1701 unsigned nr_of_controls_hint,
1702 struct lock_class_key *key, const char *name)
0996517c 1703{
77e7c4e6
SA		 1704 hdl->lock = &hdl->_lock;
1705 mutex_init(hdl->lock);
6cd247ef 1706 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1707 INIT_LIST_HEAD(&hdl->ctrls);
1708 INIT_LIST_HEAD(&hdl->ctrl_refs);
1709 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1710 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1711 GFP_KERNEL);
0996517c
HV		 1712 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1713 return hdl->error;
1714}
6cd247ef 1715EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1716
1717/* Free all controls and control refs */
1718void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1719{
1720 struct v4l2_ctrl_ref *ref, *next_ref;
1721 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1722 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1723
1724 if (hdl == NULL || hdl->buckets == NULL)
1725 return;
1726
77e7c4e6 1727 mutex_lock(hdl->lock);
0996517c
HV		 1728 /* Free all nodes */
1729 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1730 list_del(&ref->node);
1731 kfree(ref);
1732 }
1733 /* Free all controls owned by the handler */
1734 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1735 list_del(&ctrl->node);
77068d36
HV		 1736 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1737 list_del(&sev->node);
0996517c
HV		 1738 kfree(ctrl);
1739 }
1740 kfree(hdl->buckets);
1741 hdl->buckets = NULL;
1742 hdl->cached = NULL;
1743 hdl->error = 0;
77e7c4e6 1744 mutex_unlock(hdl->lock);
0996517c
HV		 1745}
1746EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1747
1748/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1749 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1750 with applications that do not use the NEXT_CTRL flag.
1751
1752 We just find the n-th private user control. It's O(N), but that should not
1753 be an issue in this particular case. */
1754static struct v4l2_ctrl_ref *find_private_ref(
1755 struct v4l2_ctrl_handler *hdl, u32 id)
1756{
1757 struct v4l2_ctrl_ref *ref;
1758
1759 id -= V4L2_CID_PRIVATE_BASE;
1760 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1761 /* Search for private user controls that are compatible with
1762 VIDIOC_G/S_CTRL. */
1763 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1764 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1765 if (!ref->ctrl->is_int)
0996517c
HV		 1766 continue;
1767 if (id == 0)
1768 return ref;
1769 id--;
1770 }
1771 }
1772 return NULL;
1773}
1774
1775/* Find a control with the given ID. */
1776static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1777{
1778 struct v4l2_ctrl_ref *ref;
1779 int bucket;
1780
1781 id &= V4L2_CTRL_ID_MASK;
1782
1783 /* Old-style private controls need special handling */
1784 if (id >= V4L2_CID_PRIVATE_BASE)
1785 return find_private_ref(hdl, id);
1786 bucket = id % hdl->nr_of_buckets;
1787
1788 /* Simple optimization: cache the last control found */
1789 if (hdl->cached && hdl->cached->ctrl->id == id)
1790 return hdl->cached;
1791
1792 /* Not in cache, search the hash */
1793 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1794 while (ref && ref->ctrl->id != id)
1795 ref = ref->next;
1796
1797 if (ref)
1798 hdl->cached = ref; /* cache it! */
1799 return ref;
1800}
1801
1802/* Find a control with the given ID. Take the handler's lock first. */
1803static struct v4l2_ctrl_ref *find_ref_lock(
1804 struct v4l2_ctrl_handler *hdl, u32 id)
1805{
1806 struct v4l2_ctrl_ref *ref = NULL;
1807
1808 if (hdl) {
77e7c4e6 1809 mutex_lock(hdl->lock);
0996517c 1810 ref = find_ref(hdl, id);
77e7c4e6 1811 mutex_unlock(hdl->lock);
0996517c
HV		 1812 }
1813 return ref;
1814}
1815
1816/* Find a control with the given ID. */
1817struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1818{
1819 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1820
1821 return ref ? ref->ctrl : NULL;
1822}
1823EXPORT_SYMBOL(v4l2_ctrl_find);
1824
1825/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1826static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1827 struct v4l2_ctrl *ctrl)
1828{
1829 struct v4l2_ctrl_ref *ref;
1830 struct v4l2_ctrl_ref *new_ref;
1831 u32 id = ctrl->id;
1832 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1833 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1834
d9a25471
HV		 1835 /*
1836 * Automatically add the control class if it is not yet present and
1837 * the new control is not a compound control.
1838 */
1839 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1840 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1841 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1842 return hdl->error;
1843
1844 if (hdl->error)
1845 return hdl->error;
1846
1847 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1848 if (!new_ref)
1849 return handler_set_err(hdl, -ENOMEM);
1850 new_ref->ctrl = ctrl;
1851 if (ctrl->handler == hdl) {
1852 /* By default each control starts in a cluster of its own.
1853 new_ref->ctrl is basically a cluster array with one
1854 element, so that's perfect to use as the cluster pointer.
1855 But only do this for the handler that owns the control. */
1856 ctrl->cluster = &new_ref->ctrl;
1857 ctrl->ncontrols = 1;
1858 }
1859
1860 INIT_LIST_HEAD(&new_ref->node);
1861
77e7c4e6 1862 mutex_lock(hdl->lock);
0996517c
HV		 1863
1864 /* Add immediately at the end of the list if the list is empty, or if
1865 the last element in the list has a lower ID.
1866 This ensures that when elements are added in ascending order the
1867 insertion is an O(1) operation. */
1868 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1869 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1870 goto insert_in_hash;
1871 }
1872
1873 /* Find insert position in sorted list */
1874 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1875 if (ref->ctrl->id < id)
1876 continue;
1877 /* Don't add duplicates */
1878 if (ref->ctrl->id == id) {
1879 kfree(new_ref);
1880 goto unlock;
1881 }
1882 list_add(&new_ref->node, ref->node.prev);
1883 break;
1884 }
1885
1886insert_in_hash:
1887 /* Insert the control node in the hash */
1888 new_ref->next = hdl->buckets[bucket];
1889 hdl->buckets[bucket] = new_ref;
1890
1891unlock:
77e7c4e6 1892 mutex_unlock(hdl->lock);
0996517c
HV		 1893 return 0;
1894}
1895
1896/* Add a new control */
1897static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1898 const struct v4l2_ctrl_ops *ops,
0176077a 1899 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1900 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1901 s64 min, s64 max, u64 step, s64 def,
20d88eef 1902 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1903 u32 flags, const char * const *qmenu,
1904 const s64 *qmenu_int, void *priv)
0996517c
HV		 1905{
1906 struct v4l2_ctrl *ctrl;
d9a25471 1907 unsigned sz_extra;
20d88eef
HV		 1908 unsigned nr_of_dims = 0;
1909 unsigned elems = 1;
998e7659
HV		 1910 bool is_array;
1911 unsigned tot_ctrl_size;
302ab7ce 1912 unsigned idx;
d9a25471 1913 void *data;
2ccbe779 1914 int err;
0996517c
HV		 1915
1916 if (hdl->error)
1917 return NULL;
1918
20d88eef
HV		 1919 while (dims && dims[nr_of_dims]) {
1920 elems *= dims[nr_of_dims];
1921 nr_of_dims++;
1922 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1923 break;
1924 }
998e7659 1925 is_array = nr_of_dims > 0;
20d88eef 1926
dda4a4d5
HV		 1927 /* Prefill elem_size for all types handled by std_type_ops */
1928 switch (type) {
1929 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1930 elem_size = sizeof(s64);
dda4a4d5
HV		 1931 break;
1932 case V4L2_CTRL_TYPE_STRING:
d9a25471 1933 elem_size = max + 1;
dda4a4d5
HV		 1934 break;
1935 case V4L2_CTRL_TYPE_U8:
1936 elem_size = sizeof(u8);
1937 break;
1938 case V4L2_CTRL_TYPE_U16:
1939 elem_size = sizeof(u16);
1940 break;
811c5081
HV		 1941 case V4L2_CTRL_TYPE_U32:
1942 elem_size = sizeof(u32);
1943 break;
dda4a4d5
HV		 1944 default:
1945 if (type < V4L2_CTRL_COMPOUND_TYPES)
1946 elem_size = sizeof(s32);
1947 break;
1948 }
998e7659 1949 tot_ctrl_size = elem_size * elems;
d9a25471 1950
0996517c 1951 /* Sanity checks */
998e7659
HV		 1952 if (id == 0 || name == NULL || !elem_size ||
1953 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1954 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1955 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1956 handler_set_err(hdl, -ERANGE);
1957 return NULL;
1958 }
2ccbe779
SN		 1959 err = check_range(type, min, max, step, def);
1960 if (err) {
1961 handler_set_err(hdl, err);
02ac0480
HV		 1962 return NULL;
1963 }
fa4d7096
HV		 1964 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1965 handler_set_err(hdl, -ERANGE);
1966 return NULL;
1967 }
998e7659
HV		 1968 if (is_array &&
1969 (type == V4L2_CTRL_TYPE_BUTTON ||
1970 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
1971 handler_set_err(hdl, -EINVAL);
1972 return NULL;
1973 }
0996517c 1974
d9a25471 1975 sz_extra = 0;
0996517c 1976 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 1977 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1978 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1979 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1980 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 1981 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
1982 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 1983 type >= V4L2_CTRL_COMPOUND_TYPES ||
1984 is_array)
1985 sz_extra += 2 * tot_ctrl_size;
0996517c
HV		 1986
1987 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1988 if (ctrl == NULL) {
1989 handler_set_err(hdl, -ENOMEM);
1990 return NULL;
1991 }
1992
1993 INIT_LIST_HEAD(&ctrl->node);
77068d36 1994 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1995 ctrl->handler = hdl;
1996 ctrl->ops = ops;
0176077a 1997 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 1998 ctrl->id = id;
1999 ctrl->name = name;
2000 ctrl->type = type;
2001 ctrl->flags = flags;
2002 ctrl->minimum = min;
2003 ctrl->maximum = max;
2004 ctrl->step = step;
d9a25471 2005 ctrl->default_value = def;
998e7659
HV		 2006 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2007 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2008 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2009 ctrl->is_array = is_array;
20d88eef
HV		 2010 ctrl->elems = elems;
2011 ctrl->nr_of_dims = nr_of_dims;
2012 if (nr_of_dims)
2013 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2014 ctrl->elem_size = elem_size;
ce580fe5
SA		 2015 if (type == V4L2_CTRL_TYPE_MENU)
2016 ctrl->qmenu = qmenu;
2017 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2018 ctrl->qmenu_int = qmenu_int;
0996517c 2019 ctrl->priv = priv;
d9a25471 2020 ctrl->cur.val = ctrl->val = def;
2a9ec373 2021 data = &ctrl[1];
d9a25471 2022
2a9ec373
HV		 2023 if (!ctrl->is_int) {
2024 ctrl->p_new.p = data;
998e7659 2025 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2026 } else {
2027 ctrl->p_new.p = &ctrl->val;
2028 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2029 }
302ab7ce
HV		 2030 for (idx = 0; idx < elems; idx++) {
2031 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2032 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2033 }
0176077a 2034
0996517c
HV		 2035 if (handler_new_ref(hdl, ctrl)) {
2036 kfree(ctrl);
2037 return NULL;
2038 }
77e7c4e6 2039 mutex_lock(hdl->lock);
0996517c 2040 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2041 mutex_unlock(hdl->lock);
0996517c
HV		 2042 return ctrl;
2043}
2044
2045struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2046 const struct v4l2_ctrl_config *cfg, void *priv)
2047{
2048 bool is_menu;
2049 struct v4l2_ctrl *ctrl;
2050 const char *name = cfg->name;
513521ea 2051 const char * const *qmenu = cfg->qmenu;
ce580fe5 2052 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2053 enum v4l2_ctrl_type type = cfg->type;
2054 u32 flags = cfg->flags;
0ba2aeb6
HV		 2055 s64 min = cfg->min;
2056 s64 max = cfg->max;
2057 u64 step = cfg->step;
2058 s64 def = cfg->def;
0996517c
HV		 2059
2060 if (name == NULL)
2061 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2062 &def, &flags);
2063
ce580fe5
SA		 2064 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2065 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2066 if (is_menu)
2067 WARN_ON(step);
2068 else
2069 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2070 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2071 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2072 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2073 qmenu_int == NULL) {
2074 handler_set_err(hdl, -EINVAL);
2075 return NULL;
2076 }
0996517c 2077
0176077a 2078 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2079 type, min, max,
20d88eef
HV		 2080 is_menu ? cfg->menu_skip_mask : step, def,
2081 cfg->dims, cfg->elem_size,
d9a25471 2082 flags, qmenu, qmenu_int, priv);
88365105 2083 if (ctrl)
0996517c 2084 ctrl->is_private = cfg->is_private;
0996517c
HV		 2085 return ctrl;
2086}
2087EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2088
2089/* Helper function for standard non-menu controls */
2090struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2091 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2092 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2093{
2094 const char *name;
2095 enum v4l2_ctrl_type type;
2096 u32 flags;
2097
2098 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2099 if (type == V4L2_CTRL_TYPE_MENU ||
2100 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2101 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2102 handler_set_err(hdl, -EINVAL);
2103 return NULL;
2104 }
0176077a 2105 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2106 min, max, step, def, NULL, 0,
d9a25471 2107 flags, NULL, NULL, NULL);
0996517c
HV		 2108}
2109EXPORT_SYMBOL(v4l2_ctrl_new_std);
2110
2111/* Helper function for standard menu controls */
2112struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2113 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2114 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2115{
d1e9b7c1
SN		 2116 const char * const *qmenu = NULL;
2117 const s64 *qmenu_int = NULL;
fbbb29a6 2118 unsigned int qmenu_int_len = 0;
0996517c
HV		 2119 const char *name;
2120 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2121 s64 min;
2122 s64 max = _max;
2123 s64 def = _def;
2124 u64 step;
0996517c
HV		 2125 u32 flags;
2126
2127 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2128
2129 if (type == V4L2_CTRL_TYPE_MENU)
2130 qmenu = v4l2_ctrl_get_menu(id);
2131 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2132 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2133
2134 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2135 handler_set_err(hdl, -EINVAL);
2136 return NULL;
2137 }
0176077a 2138 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2139 0, max, mask, def, NULL, 0,
d9a25471 2140 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2141}
2142EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2143
117a711a
LP		 2144/* Helper function for standard menu controls with driver defined menu */
2145struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2146 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2147 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2148{
2149 enum v4l2_ctrl_type type;
2150 const char *name;
2151 u32 flags;
0ba2aeb6
HV		 2152 u64 step;
2153 s64 min;
2154 s64 max = _max;
2155 s64 def = _def;
117a711a
LP		 2156
2157 /* v4l2_ctrl_new_std_menu_items() should only be called for
2158 * standard controls without a standard menu.
2159 */
2160 if (v4l2_ctrl_get_menu(id)) {
2161 handler_set_err(hdl, -EINVAL);
2162 return NULL;
2163 }
2164
2165 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2166 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2167 handler_set_err(hdl, -EINVAL);
2168 return NULL;
2169 }
0176077a 2170 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2171 0, max, mask, def, NULL, 0,
2172 flags, qmenu, NULL, NULL);
117a711a
LP		 2173
2174}
2175EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2176
515f3287
SN		 2177/* Helper function for standard integer menu controls */
2178struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2179 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2180 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2181{
2182 const char *name;
2183 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2184 s64 min;
2185 u64 step;
2186 s64 max = _max;
2187 s64 def = _def;
515f3287
SN		 2188 u32 flags;
2189
2190 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2191 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2192 handler_set_err(hdl, -EINVAL);
2193 return NULL;
2194 }
0176077a 2195 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2196 0, max, 0, def, NULL, 0,
d9a25471 2197 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2198}
2199EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2200
0996517c
HV		 2201/* Add a control from another handler to this handler */
2202struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
2203 struct v4l2_ctrl *ctrl)
2204{
2205 if (hdl == NULL || hdl->error)
2206 return NULL;
2207 if (ctrl == NULL) {
2208 handler_set_err(hdl, -EINVAL);
2209 return NULL;
2210 }
2211 if (ctrl->handler == hdl)
2212 return ctrl;
2213 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
2214}
2215EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
2216
2217/* Add the controls from another handler to our own. */
2218int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2219 struct v4l2_ctrl_handler *add,
2220 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2221{
072e6602 2222 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2223 int ret = 0;
2224
2225 /* Do nothing if either handler is NULL or if they are the same */
2226 if (!hdl || !add || hdl == add)
2227 return 0;
2228 if (hdl->error)
2229 return hdl->error;
77e7c4e6 2230 mutex_lock(add->lock);
072e6602
HV		 2231 list_for_each_entry(ref, &add->ctrl_refs, node) {
2232 struct v4l2_ctrl *ctrl = ref->ctrl;
2233
0996517c
HV		 2234 /* Skip handler-private controls. */
2235 if (ctrl->is_private)
2236 continue;
6e239399
HV		 2237 /* And control classes */
2238 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2239 continue;
34a6b7d0
HV		 2240 /* Filter any unwanted controls */
2241 if (filter && !filter(ctrl))
2242 continue;
0996517c
HV		 2243 ret = handler_new_ref(hdl, ctrl);
2244 if (ret)
2245 break;
2246 }
77e7c4e6 2247 mutex_unlock(add->lock);
0996517c
HV		 2248 return ret;
2249}
2250EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2251
34a6b7d0
HV		 2252bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2253{
2254 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
2255 return true;
3963d4fb
HV		 2256 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
2257 return true;
34a6b7d0
HV		 2258 switch (ctrl->id) {
2259 case V4L2_CID_AUDIO_MUTE:
2260 case V4L2_CID_AUDIO_VOLUME:
2261 case V4L2_CID_AUDIO_BALANCE:
2262 case V4L2_CID_AUDIO_BASS:
2263 case V4L2_CID_AUDIO_TREBLE:
2264 case V4L2_CID_AUDIO_LOUDNESS:
2265 return true;
2266 default:
2267 break;
2268 }
2269 return false;
2270}
2271EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2272
0996517c
HV		 2273/* Cluster controls */
2274void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2275{
5626b8c7 2276 bool has_volatiles = false;
0996517c
HV		 2277 int i;
2278
2279 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2280 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2281 return;
0996517c
HV		 2282
2283 for (i = 0; i < ncontrols; i++) {
2284 if (controls[i]) {
2285 controls[i]->cluster = controls;
2286 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2287 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2288 has_volatiles = true;
0996517c
HV		 2289 }
2290 }
5626b8c7 2291 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2292}
2293EXPORT_SYMBOL(v4l2_ctrl_cluster);
2294
72d877ca
HV		 2295void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2296 u8 manual_val, bool set_volatile)
2297{
2298 struct v4l2_ctrl *master = controls[0];
5626b8c7 2299 u32 flag = 0;
72d877ca
HV		 2300 int i;
2301
2302 v4l2_ctrl_cluster(ncontrols, controls);
2303 WARN_ON(ncontrols <= 1);
82a7c049 2304 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2305 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2306 master->is_auto = true;
5626b8c7 2307 master->has_volatiles = set_volatile;
72d877ca
HV		 2308 master->manual_mode_value = manual_val;
2309 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2310
2311 if (!is_cur_manual(master))
2312 flag = V4L2_CTRL_FLAG_INACTIVE |
2313 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2314
2315 for (i = 1; i < ncontrols; i++)
88365105 2316 if (controls[i])
72d877ca 2317 controls[i]->flags |= flag;
72d877ca
HV		 2318}
2319EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2320
0996517c
HV		 2321/* Activate/deactivate a control. */
2322void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2323{
6e239399
HV		 2324 /* invert since the actual flag is called 'inactive' */
2325 bool inactive = !active;
2326 bool old;
2327
0996517c
HV		 2328 if (ctrl == NULL)
2329 return;
2330
6e239399 2331 if (inactive)
0996517c 2332 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2333 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2334 else
2335 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2336 old = test_and_clear_bit(4, &ctrl->flags);
2337 if (old != inactive)
2338 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2339}
2340EXPORT_SYMBOL(v4l2_ctrl_activate);
2341
2342/* Grab/ungrab a control.
2343 Typically used when streaming starts and you want to grab controls,
2344 preventing the user from changing them.
2345
2346 Just call this and the framework will block any attempts to change
2347 these controls. */
2348void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2349{
6e239399
HV		 2350 bool old;
2351
0996517c
HV		 2352 if (ctrl == NULL)
2353 return;
2354
6e239399 2355 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2356 if (grabbed)
2357 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2358 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2359 else
2360 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2361 old = test_and_clear_bit(1, &ctrl->flags);
2362 if (old != grabbed)
2363 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2364 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2365}
2366EXPORT_SYMBOL(v4l2_ctrl_grab);
2367
2368/* Log the control name and value */
2369static void log_ctrl(const struct v4l2_ctrl *ctrl,
2370 const char *prefix, const char *colon)
2371{
0996517c
HV		 2372 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2373 return;
2374 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2375 return;
2376
7eafbce9 2377 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2378
0176077a
HV		 2379 ctrl->type_ops->log(ctrl);
2380
88365105
HV		 2381 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2382 V4L2_CTRL_FLAG_GRABBED |
2383 V4L2_CTRL_FLAG_VOLATILE)) {
2384 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2385 pr_cont(" inactive");
88365105 2386 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2387 pr_cont(" grabbed");
88365105 2388 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2389 pr_cont(" volatile");
88365105 2390 }
7eafbce9 2391 pr_cont("\n");
0996517c
HV		 2392}
2393
2394/* Log all controls owned by the handler */
2395void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2396 const char *prefix)
2397{
2398 struct v4l2_ctrl *ctrl;
2399 const char *colon = "";
2400 int len;
2401
2402 if (hdl == NULL)
2403 return;
2404 if (prefix == NULL)
2405 prefix = "";
2406 len = strlen(prefix);
2407 if (len && prefix[len - 1] != ' ')
2408 colon = ": ";
77e7c4e6 2409 mutex_lock(hdl->lock);
0996517c
HV		 2410 list_for_each_entry(ctrl, &hdl->ctrls, node)
2411 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2412 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2413 mutex_unlock(hdl->lock);
0996517c
HV		 2414}
2415EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2416
ffa9b9f0
SN		 2417int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2418{
2419 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2420 return 0;
2421}
2422EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2423
0996517c
HV		 2424/* Call s_ctrl for all controls owned by the handler */
2425int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2426{
2427 struct v4l2_ctrl *ctrl;
2428 int ret = 0;
2429
2430 if (hdl == NULL)
2431 return 0;
77e7c4e6 2432 mutex_lock(hdl->lock);
0996517c
HV		 2433 list_for_each_entry(ctrl, &hdl->ctrls, node)
2434 ctrl->done = false;
2435
2436 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2437 struct v4l2_ctrl *master = ctrl->cluster[0];
2438 int i;
2439
2440 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2441 /* Skip button controls and read-only controls. */
2442 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2443 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2444 continue;
2445
2a863793
HV		 2446 for (i = 0; i < master->ncontrols; i++) {
2447 if (master->cluster[i]) {
2448 cur_to_new(master->cluster[i]);
2449 master->cluster[i]->is_new = 1;
71c6c4c9 2450 master->cluster[i]->done = true;
2a863793
HV		 2451 }
2452 }
54c911eb 2453 ret = call_op(master, s_ctrl);
0996517c
HV		 2454 if (ret)
2455 break;
0996517c 2456 }
77e7c4e6 2457 mutex_unlock(hdl->lock);
0996517c
HV		 2458 return ret;
2459}
2460EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2461
d9a25471
HV		 2462/* Implement VIDIOC_QUERY_EXT_CTRL */
2463int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2464{
d9a25471 2465 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2466 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2467 struct v4l2_ctrl_ref *ref;
2468 struct v4l2_ctrl *ctrl;
2469
2470 if (hdl == NULL)
2471 return -EINVAL;
2472
77e7c4e6 2473 mutex_lock(hdl->lock);
0996517c
HV		 2474
2475 /* Try to find it */
2476 ref = find_ref(hdl, id);
2477
d9a25471
HV		 2478 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2479 bool is_compound;
2480 /* Match any control that is not hidden */
2481 unsigned mask = 1;
2482 bool match = false;
2483
2484 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2485 /* Match any hidden control */
2486 match = true;
2487 } else if ((qc->id & next_flags) == next_flags) {
2488 /* Match any control, compound or not */
2489 mask = 0;
2490 }
2491
0996517c
HV		 2492 /* Find the next control with ID > qc->id */
2493
2494 /* Did we reach the end of the control list? */
2495 if (id >= node2id(hdl->ctrl_refs.prev)) {
2496 ref = NULL; /* Yes, so there is no next control */
2497 } else if (ref) {
2498 /* We found a control with the given ID, so just get
d9a25471
HV		 2499 the next valid one in the list. */
2500 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2501 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2502 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2503 if (id < ref->ctrl->id &&
2504 (is_compound & mask) == match)
2505 break;
2506 }
2507 if (&ref->node == &hdl->ctrl_refs)
2508 ref = NULL;
0996517c
HV		 2509 } else {
2510 /* No control with the given ID exists, so start
2511 searching for the next largest ID. We know there
2512 is one, otherwise the first 'if' above would have
2513 been true. */
d9a25471 2514 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2515 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2516 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2517 if (id < ref->ctrl->id &&
2518 (is_compound & mask) == match)
0996517c 2519 break;
d9a25471
HV		 2520 }
2521 if (&ref->node == &hdl->ctrl_refs)
2522 ref = NULL;
0996517c
HV		 2523 }
2524 }
77e7c4e6 2525 mutex_unlock(hdl->lock);
d9a25471 2526
0996517c
HV		 2527 if (!ref)
2528 return -EINVAL;
2529
2530 ctrl = ref->ctrl;
2531 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2532 if (id >= V4L2_CID_PRIVATE_BASE)
2533 qc->id = id;
2534 else
2535 qc->id = ctrl->id;
0996517c 2536 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2537 qc->flags = ctrl->flags;
2538 qc->type = ctrl->type;
2539 if (ctrl->is_ptr)
2540 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2541 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2542 qc->elems = ctrl->elems;
2543 qc->nr_of_dims = ctrl->nr_of_dims;
2544 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2545 qc->minimum = ctrl->minimum;
2546 qc->maximum = ctrl->maximum;
2547 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2548 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2549 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2550 qc->step = 1;
2551 else
2552 qc->step = ctrl->step;
d9a25471
HV		 2553 return 0;
2554}
2555EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2556
2557/* Implement VIDIOC_QUERYCTRL */
2558int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2559{
2560 struct v4l2_query_ext_ctrl qec = { qc->id };
2561 int rc;
2562
2563 rc = v4l2_query_ext_ctrl(hdl, &qec);
2564 if (rc)
2565 return rc;
2566
2567 qc->id = qec.id;
2568 qc->type = qec.type;
2569 qc->flags = qec.flags;
2570 strlcpy(qc->name, qec.name, sizeof(qc->name));
2571 switch (qc->type) {
2572 case V4L2_CTRL_TYPE_INTEGER:
2573 case V4L2_CTRL_TYPE_BOOLEAN:
2574 case V4L2_CTRL_TYPE_MENU:
2575 case V4L2_CTRL_TYPE_INTEGER_MENU:
2576 case V4L2_CTRL_TYPE_STRING:
2577 case V4L2_CTRL_TYPE_BITMASK:
2578 qc->minimum = qec.minimum;
2579 qc->maximum = qec.maximum;
2580 qc->step = qec.step;
2581 qc->default_value = qec.default_value;
2582 break;
2583 default:
2584 qc->minimum = 0;
2585 qc->maximum = 0;
2586 qc->step = 0;
2587 qc->default_value = 0;
2588 break;
2589 }
0996517c
HV		 2590 return 0;
2591}
2592EXPORT_SYMBOL(v4l2_queryctrl);
2593
2594int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2595{
d9a25471 2596 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2597 return -EINVAL;
0996517c
HV		 2598 return v4l2_queryctrl(sd->ctrl_handler, qc);
2599}
2600EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2601
2602/* Implement VIDIOC_QUERYMENU */
2603int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2604{
2605 struct v4l2_ctrl *ctrl;
2606 u32 i = qm->index;
2607
2608 ctrl = v4l2_ctrl_find(hdl, qm->id);
2609 if (!ctrl)
2610 return -EINVAL;
2611
2612 qm->reserved = 0;
2613 /* Sanity checks */
ce580fe5
SA		 2614 switch (ctrl->type) {
2615 case V4L2_CTRL_TYPE_MENU:
2616 if (ctrl->qmenu == NULL)
2617 return -EINVAL;
2618 break;
2619 case V4L2_CTRL_TYPE_INTEGER_MENU:
2620 if (ctrl->qmenu_int == NULL)
2621 return -EINVAL;
2622 break;
2623 default:
2624 return -EINVAL;
2625 }
2626
2627 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2628 return -EINVAL;
ce580fe5 2629
0996517c
HV		 2630 /* Use mask to see if this menu item should be skipped */
2631 if (ctrl->menu_skip_mask & (1 << i))
2632 return -EINVAL;
2633 /* Empty menu items should also be skipped */
ce580fe5
SA		 2634 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2635 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2636 return -EINVAL;
2637 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2638 } else {
2639 qm->value = ctrl->qmenu_int[i];
2640 }
0996517c
HV		 2641 return 0;
2642}
2643EXPORT_SYMBOL(v4l2_querymenu);
2644
2645int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2646{
2647 return v4l2_querymenu(sd->ctrl_handler, qm);
2648}
2649EXPORT_SYMBOL(v4l2_subdev_querymenu);
2650
2651
2652
2653/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2654
2655 It is not a fully atomic operation, just best-effort only. After all, if
2656 multiple controls have to be set through multiple i2c writes (for example)
2657 then some initial writes may succeed while others fail. Thus leaving the
2658 system in an inconsistent state. The question is how much effort you are
2659 willing to spend on trying to make something atomic that really isn't.
2660
2661 From the point of view of an application the main requirement is that
2662 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2663 error should be returned without actually affecting any controls.
2664
2665 If all the values are correct, then it is acceptable to just give up
2666 in case of low-level errors.
2667
2668 It is important though that the application can tell when only a partial
2669 configuration was done. The way we do that is through the error_idx field
2670 of struct v4l2_ext_controls: if that is equal to the count field then no
2671 controls were affected. Otherwise all controls before that index were
2672 successful in performing their 'get' or 'set' operation, the control at
2673 the given index failed, and you don't know what happened with the controls
2674 after the failed one. Since if they were part of a control cluster they
2675 could have been successfully processed (if a cluster member was encountered
2676 at index < error_idx), they could have failed (if a cluster member was at
2677 error_idx), or they may not have been processed yet (if the first cluster
2678 member appeared after error_idx).
2679
2680 It is all fairly theoretical, though. In practice all you can do is to
2681 bail out. If error_idx == count, then it is an application bug. If
2682 error_idx < count then it is only an application bug if the error code was
2683 EBUSY. That usually means that something started streaming just when you
2684 tried to set the controls. In all other cases it is a driver/hardware
2685 problem and all you can do is to retry or bail out.
2686
2687 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2688 never modifies controls the error_idx is just set to whatever control
2689 has an invalid value.
2690 */
2691
2692/* Prepare for the extended g/s/try functions.
2693 Find the controls in the control array and do some basic checks. */
2694static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2695 struct v4l2_ext_controls *cs,
d9a25471
HV		 2696 struct v4l2_ctrl_helper *helpers,
2697 bool get)
0996517c 2698{
eb5b16ef
HV		 2699 struct v4l2_ctrl_helper *h;
2700 bool have_clusters = false;
0996517c
HV		 2701 u32 i;
2702
eb5b16ef 2703 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2704 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2705 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2706 struct v4l2_ctrl *ctrl;
2707 u32 id = c->id & V4L2_CTRL_ID_MASK;
2708
37cd3b73 2709 cs->error_idx = i;
0996517c
HV		 2710
2711 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2712 return -EINVAL;
2713
2714 /* Old-style private controls are not allowed for
2715 extended controls */
2716 if (id >= V4L2_CID_PRIVATE_BASE)
2717 return -EINVAL;
eb5b16ef
HV		 2718 ref = find_ref_lock(hdl, id);
2719 if (ref == NULL)
0996517c 2720 return -EINVAL;
eb5b16ef 2721 ctrl = ref->ctrl;
0996517c
HV		 2722 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2723 return -EINVAL;
2724
eb5b16ef
HV		 2725 if (ctrl->cluster[0]->ncontrols > 1)
2726 have_clusters = true;
2727 if (ctrl->cluster[0] != ctrl)
2728 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2729 if (ctrl->is_ptr && !ctrl->is_string) {
2730 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2731
2732 if (c->size < tot_size) {
2733 if (get) {
2734 c->size = tot_size;
2735 return -ENOSPC;
2736 }
2737 return -EFAULT;
d9a25471 2738 }
302ab7ce 2739 c->size = tot_size;
d9a25471 2740 }
eb5b16ef
HV		 2741 /* Store the ref to the master control of the cluster */
2742 h->mref = ref;
2743 h->ctrl = ctrl;
2744 /* Initially set next to 0, meaning that there is no other
2745 control in this helper array belonging to the same
2746 cluster */
2747 h->next = 0;
0996517c 2748 }
0996517c 2749
eb5b16ef
HV		 2750 /* We are done if there were no controls that belong to a multi-
2751 control cluster. */
2752 if (!have_clusters)
2753 return 0;
0996517c 2754
eb5b16ef
HV		 2755 /* The code below figures out in O(n) time which controls in the list
2756 belong to the same cluster. */
0996517c 2757
eb5b16ef 2758 /* This has to be done with the handler lock taken. */
77e7c4e6 2759 mutex_lock(hdl->lock);
0996517c 2760
eb5b16ef
HV		 2761 /* First zero the helper field in the master control references */
2762 for (i = 0; i < cs->count; i++)
c082266f 2763 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2764 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2765 struct v4l2_ctrl_ref *mref = h->mref;
2766
2767 /* If the mref->helper is set, then it points to an earlier
2768 helper that belongs to the same cluster. */
2769 if (mref->helper) {
2770 /* Set the next field of mref->helper to the current
2771 index: this means that that earlier helper now
2772 points to the next helper in the same cluster. */
2773 mref->helper->next = i;
2774 /* mref should be set only for the first helper in the
2775 cluster, clear the others. */
2776 h->mref = NULL;
2777 }
2778 /* Point the mref helper to the current helper struct. */
2779 mref->helper = h;
0996517c 2780 }
77e7c4e6 2781 mutex_unlock(hdl->lock);
eb5b16ef 2782 return 0;
0996517c
HV		 2783}
2784
2785/* Handles the corner case where cs->count == 0. It checks whether the
2786 specified control class exists. If that class ID is 0, then it checks
2787 whether there are any controls at all. */
2788static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2789{
2790 if (ctrl_class == 0)
2791 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2792 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2793}
2794
2795
2796
2797/* Get extended controls. Allocates the helpers array if needed. */
2798int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2799{
eb5b16ef
HV		 2800 struct v4l2_ctrl_helper helper[4];
2801 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2802 int ret;
ddac5c10 2803 int i, j;
0996517c
HV		 2804
2805 cs->error_idx = cs->count;
2806 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2807
2808 if (hdl == NULL)
2809 return -EINVAL;
2810
2811 if (cs->count == 0)
2812 return class_check(hdl, cs->ctrl_class);
2813
2814 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2815 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2816 GFP_KERNEL);
0996517c
HV		 2817 if (helpers == NULL)
2818 return -ENOMEM;
2819 }
2820
d9a25471 2821 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2822 cs->error_idx = cs->count;
0996517c
HV		 2823
2824 for (i = 0; !ret && i < cs->count; i++)
2825 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2826 ret = -EACCES;
2827
2828 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2829 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2830 struct v4l2_ctrl *ctrl) = cur_to_user;
2831 struct v4l2_ctrl *master;
0996517c 2832
eb5b16ef 2833 if (helpers[i].mref == NULL)
0996517c
HV		 2834 continue;
2835
eb5b16ef 2836 master = helpers[i].mref->ctrl;
0996517c
HV		 2837 cs->error_idx = i;
2838
2839 v4l2_ctrl_lock(master);
ddac5c10
HV		 2840
2841 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2842 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2843 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2844 for (j = 0; j < master->ncontrols; j++)
2845 cur_to_new(master->cluster[j]);
54c911eb 2846 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2847 ctrl_to_user = new_to_user;
ddac5c10
HV		 2848 }
2849 /* If OK, then copy the current (for non-volatile controls)
2850 or the new (for volatile controls) control values to the
2851 caller */
eb5b16ef
HV		 2852 if (!ret) {
2853 u32 idx = i;
2854
2855 do {
2856 ret = ctrl_to_user(cs->controls + idx,
2857 helpers[idx].ctrl);
2858 idx = helpers[idx].next;
2859 } while (!ret && idx);
2860 }
0996517c 2861 v4l2_ctrl_unlock(master);
0996517c
HV		 2862 }
2863
2864 if (cs->count > ARRAY_SIZE(helper))
2865 kfree(helpers);
2866 return ret;
2867}
2868EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2869
2870int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2871{
2872 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2873}
2874EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2875
2876/* Helper function to get a single control */
03d5285b 2877static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2878{
2879 struct v4l2_ctrl *master = ctrl->cluster[0];
2880 int ret = 0;
ddac5c10 2881 int i;
0996517c 2882
d9a25471 2883 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2884 * cur_to_user() calls below would need to be modified not to access
2885 * userspace memory when called from get_ctrl().
2886 */
d9a25471 2887 if (!ctrl->is_int)
03d5285b
LP		 2888 return -EINVAL;
2889
0996517c
HV		 2890 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2891 return -EACCES;
2892
2893 v4l2_ctrl_lock(master);
2894 /* g_volatile_ctrl will update the current control values */
5626b8c7 2895 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2896 for (i = 0; i < master->ncontrols; i++)
2897 cur_to_new(master->cluster[i]);
54c911eb 2898 ret = call_op(master, g_volatile_ctrl);
03d5285b 2899 new_to_user(c, ctrl);
ddac5c10 2900 } else {
03d5285b 2901 cur_to_user(c, ctrl);
ddac5c10 2902 }
0996517c
HV		 2903 v4l2_ctrl_unlock(master);
2904 return ret;
2905}
2906
2907int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2908{
2909 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2910 struct v4l2_ext_control c;
2911 int ret;
0996517c 2912
d9a25471 2913 if (ctrl == NULL || !ctrl->is_int)
0996517c 2914 return -EINVAL;
03d5285b
LP		 2915 ret = get_ctrl(ctrl, &c);
2916 control->value = c.value;
2917 return ret;
0996517c
HV		 2918}
2919EXPORT_SYMBOL(v4l2_g_ctrl);
2920
2921int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2922{
2923 return v4l2_g_ctrl(sd->ctrl_handler, control);
2924}
2925EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2926
2927s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2928{
03d5285b 2929 struct v4l2_ext_control c;
0996517c
HV		 2930
2931 /* It's a driver bug if this happens. */
d9a25471 2932 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2933 c.value = 0;
2934 get_ctrl(ctrl, &c);
2935 return c.value;
0996517c
HV		 2936}
2937EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2938
03d5285b
LP		 2939s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2940{
2941 struct v4l2_ext_control c;
2942
2943 /* It's a driver bug if this happens. */
998e7659 2944 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
03d5285b
LP		 2945 c.value = 0;
2946 get_ctrl(ctrl, &c);
2947 return c.value;
2948}
2949EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2950
0996517c
HV		 2951
2952/* Core function that calls try/s_ctrl and ensures that the new value is
2953 copied to the current value on a set.
2954 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2955static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2956 bool set, u32 ch_flags)
0996517c 2957{
72d877ca 2958 bool update_flag;
eb5b16ef 2959 int ret;
0996517c
HV		 2960 int i;
2961
2962 /* Go through the cluster and either validate the new value or
2963 (if no new value was set), copy the current value to the new
2964 value, ensuring a consistent view for the control ops when
2965 called. */
eb5b16ef 2966 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2967 struct v4l2_ctrl *ctrl = master->cluster[i];
2968
2969 if (ctrl == NULL)
2970 continue;
2971
eb5b16ef
HV		 2972 if (!ctrl->is_new) {
2973 cur_to_new(ctrl);
0996517c
HV		 2974 continue;
2975 }
eb5b16ef
HV		 2976 /* Check again: it may have changed since the
2977 previous check in try_or_set_ext_ctrls(). */
2978 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2979 return -EBUSY;
0996517c
HV		 2980 }
2981
eb5b16ef 2982 ret = call_op(master, try_ctrl);
0996517c
HV		 2983
2984 /* Don't set if there is no change */
72d877ca
HV		 2985 if (ret || !set || !cluster_changed(master))
2986 return ret;
2987 ret = call_op(master, s_ctrl);
72d877ca
HV		 2988 if (ret)
2989 return ret;
2990
eb5b16ef 2991 /* If OK, then make the new values permanent. */
72d877ca
HV		 2992 update_flag = is_cur_manual(master) != is_new_manual(master);
2993 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 2994 new_to_cur(fh, master->cluster[i], ch_flags |
2995 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 2996 return 0;
0996517c
HV		 2997}
2998
e6402585
HV		 2999/* Validate controls. */
3000static int validate_ctrls(struct v4l2_ext_controls *cs,
3001 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3002{
e6402585 3003 unsigned i;
0996517c
HV		 3004 int ret = 0;
3005
eb5b16ef 3006 cs->error_idx = cs->count;
0996517c
HV		 3007 for (i = 0; i < cs->count; i++) {
3008 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3009 union v4l2_ctrl_ptr p_new;
0996517c 3010
e6402585 3011 cs->error_idx = i;
0996517c
HV		 3012
3013 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3014 return -EACCES;
3015 /* This test is also done in try_set_control_cluster() which
3016 is called in atomic context, so that has the final say,
3017 but it makes sense to do an up-front check as well. Once
3018 an error occurs in try_set_control_cluster() some other
3019 controls may have been set already and we want to do a
3020 best-effort to avoid that. */
3021 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3022 return -EBUSY;
7a7f1ab3
HV		 3023 /*
3024 * Skip validation for now if the payload needs to be copied
3025 * from userspace into kernelspace. We'll validate those later.
3026 */
3027 if (ctrl->is_ptr)
3028 continue;
3029 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3030 p_new.p_s64 = &cs->controls[i].value64;
3031 else
3032 p_new.p_s32 = &cs->controls[i].value;
3033 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3034 if (ret)
3035 return ret;
0996517c 3036 }
e6402585
HV		 3037 return 0;
3038}
3039
5626b8c7
HV		 3040/* Obtain the current volatile values of an autocluster and mark them
3041 as new. */
3042static void update_from_auto_cluster(struct v4l2_ctrl *master)
3043{
3044 int i;
3045
3046 for (i = 0; i < master->ncontrols; i++)
3047 cur_to_new(master->cluster[i]);
3048 if (!call_op(master, g_volatile_ctrl))
3049 for (i = 1; i < master->ncontrols; i++)
3050 if (master->cluster[i])
3051 master->cluster[i]->is_new = 1;
3052}
3053
e6402585
HV		 3054/* Try or try-and-set controls */
3055static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3056 struct v4l2_ext_controls *cs,
3057 bool set)
3058{
3059 struct v4l2_ctrl_helper helper[4];
3060 struct v4l2_ctrl_helper *helpers = helper;
3061 unsigned i, j;
3062 int ret;
3063
3064 cs->error_idx = cs->count;
3065 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
3066
3067 if (hdl == NULL)
3068 return -EINVAL;
3069
3070 if (cs->count == 0)
3071 return class_check(hdl, cs->ctrl_class);
0996517c 3072
e6402585 3073 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 3074 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
3075 GFP_KERNEL);
e6402585
HV		 3076 if (!helpers)
3077 return -ENOMEM;
3078 }
d9a25471 3079 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3080 if (!ret)
3081 ret = validate_ctrls(cs, helpers, set);
3082 if (ret && set)
3083 cs->error_idx = cs->count;
0996517c 3084 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3085 struct v4l2_ctrl *master;
3086 u32 idx = i;
0996517c 3087
eb5b16ef 3088 if (helpers[i].mref == NULL)
0996517c
HV		 3089 continue;
3090
37cd3b73 3091 cs->error_idx = i;
eb5b16ef
HV		 3092 master = helpers[i].mref->ctrl;
3093 v4l2_ctrl_lock(master);
0996517c 3094
2a863793 3095 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3096 for (j = 0; j < master->ncontrols; j++)
3097 if (master->cluster[j])
2a863793 3098 master->cluster[j]->is_new = 0;
0996517c 3099
5626b8c7
HV		 3100 /* For volatile autoclusters that are currently in auto mode
3101 we need to discover if it will be set to manual mode.
3102 If so, then we have to copy the current volatile values
3103 first since those will become the new manual values (which
3104 may be overwritten by explicit new values from this set
3105 of controls). */
3106 if (master->is_auto && master->has_volatiles &&
3107 !is_cur_manual(master)) {
3108 /* Pick an initial non-manual value */
3109 s32 new_auto_val = master->manual_mode_value + 1;
3110 u32 tmp_idx = idx;
3111
3112 do {
3113 /* Check if the auto control is part of the
3114 list, and remember the new value. */
3115 if (helpers[tmp_idx].ctrl == master)
3116 new_auto_val = cs->controls[tmp_idx].value;
3117 tmp_idx = helpers[tmp_idx].next;
3118 } while (tmp_idx);
3119 /* If the new value == the manual value, then copy
3120 the current volatile values. */
3121 if (new_auto_val == master->manual_mode_value)
3122 update_from_auto_cluster(master);
3123 }
3124
0996517c 3125 /* Copy the new caller-supplied control values.
2a863793 3126 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3127 do {
7a7f1ab3
HV		 3128 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3129
3130 ret = user_to_new(cs->controls + idx, ctrl);
3131 if (!ret && ctrl->is_ptr)
3132 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3133 idx = helpers[idx].next;
3134 } while (!ret && idx);
0996517c
HV		 3135
3136 if (!ret)
2ccbe779 3137 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3138
3139 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3140 if (!ret) {
3141 idx = i;
3142 do {
adf41b9b 3143 ret = new_to_user(cs->controls + idx,
e6402585 3144 helpers[idx].ctrl);
eb5b16ef
HV		 3145 idx = helpers[idx].next;
3146 } while (!ret && idx);
3147 }
3148 v4l2_ctrl_unlock(master);
0996517c 3149 }
0996517c 3150
0996517c
HV		 3151 if (cs->count > ARRAY_SIZE(helper))
3152 kfree(helpers);
3153 return ret;
3154}
3155
3156int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3157{
ab892bac 3158 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3159}
3160EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3161
ab892bac
HV		 3162int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3163 struct v4l2_ext_controls *cs)
0996517c 3164{
ab892bac 3165 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3166}
3167EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3168
3169int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3170{
ab892bac 3171 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 3172}
3173EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
3174
3175int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3176{
ab892bac 3177 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 3178}
3179EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
3180
3181/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3182static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3183{
3184 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3185 int ret;
0996517c
HV		 3186 int i;
3187
2a863793 3188 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3189 for (i = 0; i < master->ncontrols; i++)
3190 if (master->cluster[i])
2a863793 3191 master->cluster[i]->is_new = 0;
0996517c 3192
7a7f1ab3
HV		 3193 ret = validate_new(ctrl, ctrl->p_new);
3194 if (ret)
3195 return ret;
5d0360a4 3196
5626b8c7
HV		 3197 /* For autoclusters with volatiles that are switched from auto to
3198 manual mode we have to update the current volatile values since
3199 those will become the initial manual values after such a switch. */
3200 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3201 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3202 update_from_auto_cluster(master);
03d5285b 3203
5d0360a4 3204 ctrl->is_new = 1;
2ccbe779
SN		 3205 return try_or_set_cluster(fh, master, true, ch_flags);
3206}
03d5285b 3207
2ccbe779
SN		 3208/* Helper function for VIDIOC_S_CTRL compatibility */
3209static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3210 struct v4l2_ext_control *c)
3211{
7a7f1ab3 3212 int ret;
2ccbe779 3213
7a7f1ab3
HV		 3214 v4l2_ctrl_lock(ctrl);
3215 user_to_new(c, ctrl);
3216 ret = set_ctrl(fh, ctrl, 0);
3217 if (!ret)
3218 cur_to_user(c, ctrl);
3219 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3220 return ret;
3221}
3222
ab892bac
HV		 3223int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3224 struct v4l2_control *control)
0996517c
HV		 3225{
3226 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3227 struct v4l2_ext_control c = { control->id };
03d5285b 3228 int ret;
0996517c 3229
d9a25471 3230 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3231 return -EINVAL;
3232
7ebbc39f
HV		 3233 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3234 return -EACCES;
3235
03d5285b 3236 c.value = control->value;
2ccbe779 3237 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3238 control->value = c.value;
3239 return ret;
0996517c
HV		 3240}
3241EXPORT_SYMBOL(v4l2_s_ctrl);
3242
3243int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3244{
ab892bac 3245 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3246}
3247EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3248
0c4348ad 3249int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3250{
0c4348ad 3251 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3252
0996517c 3253 /* It's a driver bug if this happens. */
d9a25471 3254 WARN_ON(!ctrl->is_int);
5d0360a4 3255 ctrl->val = val;
7a7f1ab3 3256 return set_ctrl(NULL, ctrl, 0);
0996517c 3257}
0c4348ad 3258EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3259
0c4348ad 3260int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3261{
0c4348ad 3262 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3263
3264 /* It's a driver bug if this happens. */
998e7659 3265 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3266 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3267 return set_ctrl(NULL, ctrl, 0);
03d5285b 3268}
0c4348ad 3269EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3270
5d0360a4
HV		 3271int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3272{
3273 lockdep_assert_held(ctrl->handler->lock);
3274
3275 /* It's a driver bug if this happens. */
3276 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3277 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3278 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3279}
3280EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3281
8ac7a949
HV		 3282void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3283{
3284 if (ctrl == NULL)
3285 return;
3286 if (notify == NULL) {
3287 ctrl->call_notify = 0;
3288 return;
3289 }
3290 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3291 return;
3292 ctrl->handler->notify = notify;
3293 ctrl->handler->notify_priv = priv;
3294 ctrl->call_notify = 1;
3295}
3296EXPORT_SYMBOL(v4l2_ctrl_notify);
3297
5a573925 3298int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3299 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3300{
7a7f1ab3 3301 bool changed;
302ab7ce 3302 int ret;
2ccbe779 3303
5a573925
SA		 3304 lockdep_assert_held(ctrl->handler->lock);
3305
2ccbe779
SN		 3306 switch (ctrl->type) {
3307 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3308 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3309 case V4L2_CTRL_TYPE_BOOLEAN:
3310 case V4L2_CTRL_TYPE_MENU:
3311 case V4L2_CTRL_TYPE_INTEGER_MENU:
3312 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3313 case V4L2_CTRL_TYPE_U8:
3314 case V4L2_CTRL_TYPE_U16:
811c5081 3315 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3316 if (ctrl->is_array)
3317 return -EINVAL;
3318 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3319 if (ret)
3320 return ret;
3321 break;
3322 default:
3323 return -EINVAL;
3324 }
2ccbe779
SN		 3325 ctrl->minimum = min;
3326 ctrl->maximum = max;
3327 ctrl->step = step;
3328 ctrl->default_value = def;
7a7f1ab3
HV		 3329 cur_to_new(ctrl);
3330 if (validate_new(ctrl, ctrl->p_new)) {
3331 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3332 *ctrl->p_new.p_s64 = def;
3333 else
3334 *ctrl->p_new.p_s32 = def;
3335 }
3336
3337 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3338 changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
3339 else
3340 changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3341 if (changed)
3342 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3343 else
3344 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3345 return ret;
3346}
5a573925 3347EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3348
6e6d76cd 3349static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3350{
3e366149
HG		 3351 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3352
3353 if (ctrl == NULL)
3354 return -EINVAL;
3355
6e239399 3356 v4l2_ctrl_lock(ctrl);
77068d36 3357 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3358 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3359 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3360 struct v4l2_event ev;
c12fcfd6 3361 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3362
c12fcfd6
HV		 3363 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3364 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3365 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3366 /* Mark the queue as active, allowing this initial
3367 event to be accepted. */
3368 sev->elems = elems;
77068d36 3369 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3370 }
3371 v4l2_ctrl_unlock(ctrl);
3e366149 3372 return 0;
6e239399 3373}
6e239399 3374
3e366149 3375static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3376{
3e366149
HG		 3377 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3378
6e239399 3379 v4l2_ctrl_lock(ctrl);
77068d36 3380 list_del(&sev->node);
6e239399
HV		 3381 v4l2_ctrl_unlock(ctrl);
3382}
3e366149
HG		 3383
3384void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3385{
3386 u32 old_changes = old->u.ctrl.changes;
3387
3388 old->u.ctrl = new->u.ctrl;
3389 old->u.ctrl.changes |= old_changes;
3390}
3391EXPORT_SYMBOL(v4l2_ctrl_replace);
3392
3393void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3394{
3395 new->u.ctrl.changes |= old->u.ctrl.changes;
3396}
3397EXPORT_SYMBOL(v4l2_ctrl_merge);
3398
3399const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3400 .add = v4l2_ctrl_add_event,
3401 .del = v4l2_ctrl_del_event,
3402 .replace = v4l2_ctrl_replace,
3403 .merge = v4l2_ctrl_merge,
3404};
3405EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3406
3407int v4l2_ctrl_log_status(struct file *file, void *fh)
3408{
3409 struct video_device *vfd = video_devdata(file);
3410 struct v4l2_fh *vfh = file->private_data;
3411
3412 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3413 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3414 vfd->v4l2_dev->name);
3415 return 0;
3416}
3417EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3418
3419int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3420 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3421{
3422 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3423 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3424 return -EINVAL;
3425}
3426EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3427
22fa4279
SN		 3428int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3429 struct v4l2_event_subscription *sub)
3430{
3431 if (!sd->ctrl_handler)
3432 return -EINVAL;
3433 return v4l2_ctrl_subscribe_event(fh, sub);
3434}
3435EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3436
a26243b0
HV		 3437unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3438{
3439 struct v4l2_fh *fh = file->private_data;
3440
3441 if (v4l2_event_pending(fh))
3442 return POLLPRI;
3443 poll_wait(file, &fh->wait, wait);
3444 return 0;
3445}
3446EXPORT_SYMBOL(v4l2_ctrl_poll);
Linux 6.x block layer and io_uring tree(s)