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Merge tag 'vfio-v4.6-rc1' of git://github.com/awilliam/linux-vfio
[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 };
45cc29af
HV		 465 static const char * const dv_it_content_type[] = {
466 "Graphics",
467 "Photo",
468 "Cinema",
469 "Game",
470 "No IT Content",
471 NULL,
472 };
a77b4fc0
HV		 473 static const char * const detect_md_mode[] = {
474 "Disabled",
475 "Global",
476 "Threshold Grid",
477 "Region Grid",
478 NULL,
479 };
977ebec7 480
c7361ae1 481
0996517c
HV		 482 switch (id) {
483 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
484 return mpeg_audio_sampling_freq;
485 case V4L2_CID_MPEG_AUDIO_ENCODING:
486 return mpeg_audio_encoding;
487 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
488 return mpeg_audio_l1_bitrate;
489 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
490 return mpeg_audio_l2_bitrate;
491 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
492 return mpeg_audio_l3_bitrate;
493 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
494 return mpeg_audio_ac3_bitrate;
495 case V4L2_CID_MPEG_AUDIO_MODE:
496 return mpeg_audio_mode;
497 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
498 return mpeg_audio_mode_extension;
499 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
500 return mpeg_audio_emphasis;
501 case V4L2_CID_MPEG_AUDIO_CRC:
502 return mpeg_audio_crc;
24c19a21
HV		 503 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
504 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
505 return mpeg_audio_dec_playback;
0996517c
HV		 506 case V4L2_CID_MPEG_VIDEO_ENCODING:
507 return mpeg_video_encoding;
508 case V4L2_CID_MPEG_VIDEO_ASPECT:
509 return mpeg_video_aspect;
510 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
511 return mpeg_video_bitrate_mode;
512 case V4L2_CID_MPEG_STREAM_TYPE:
513 return mpeg_stream_type;
514 case V4L2_CID_MPEG_STREAM_VBI_FMT:
515 return mpeg_stream_vbi_fmt;
516 case V4L2_CID_POWER_LINE_FREQUENCY:
517 return camera_power_line_frequency;
518 case V4L2_CID_EXPOSURE_AUTO:
519 return camera_exposure_auto;
cf072139
SN		 520 case V4L2_CID_EXPOSURE_METERING:
521 return camera_exposure_metering;
2272ab65
SN		 522 case V4L2_CID_AUTO_FOCUS_RANGE:
523 return camera_auto_focus_range;
0996517c
HV		 524 case V4L2_CID_COLORFX:
525 return colorfx;
e40a0573
SN		 526 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
527 return auto_n_preset_white_balance;
7f84ad8b
SN		 528 case V4L2_CID_ISO_SENSITIVITY_AUTO:
529 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 530 case V4L2_CID_SCENE_MODE:
531 return scene_mode;
0996517c 532 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 533 return tune_emphasis;
534 case V4L2_CID_TUNE_DEEMPHASIS:
535 return tune_emphasis;
0b159acd
SA		 536 case V4L2_CID_FLASH_LED_MODE:
537 return flash_led_mode;
538 case V4L2_CID_FLASH_STROBE_SOURCE:
539 return flash_strobe_source;
064f5096
KD		 540 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
541 return header_mode;
542 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
543 return multi_slice;
544 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
545 return entropy_mode;
546 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
547 return mpeg_h264_level;
548 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
549 return h264_loop_filter;
550 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
551 return h264_profile;
552 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
553 return vui_sar_idc;
2e81dde9
AK		 554 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
555 return h264_fp_arrangement_type;
556 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
557 return h264_fmo_map_type;
064f5096
KD		 558 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
559 return mpeg_mpeg4_level;
560 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
561 return mpeg4_profile;
bc9028e1
AK		 562 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
563 return vpx_golden_frame_sel;
c7361ae1
SN		 564 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
565 return jpeg_chroma_subsampling;
977ebec7
HV		 566 case V4L2_CID_DV_TX_MODE:
567 return dv_tx_mode;
568 case V4L2_CID_DV_TX_RGB_RANGE:
569 case V4L2_CID_DV_RX_RGB_RANGE:
570 return dv_rgb_range;
45cc29af
HV		 571 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
572 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
573 return dv_it_content_type;
a77b4fc0
HV		 574 case V4L2_CID_DETECT_MD_MODE:
575 return detect_md_mode;
c7361ae1 576
0996517c
HV		 577 default:
578 return NULL;
579 }
580}
581EXPORT_SYMBOL(v4l2_ctrl_get_menu);
582
bc9028e1 583#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 584/*
585 * Returns NULL or an s64 type array containing the menu for given
586 * control ID. The total number of the menu items is returned in @len.
587 */
4eed9b33 588const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 589{
4eed9b33 590 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 591 1, 2, 4, 8,
592 };
593
4eed9b33 594 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 595 1, 2, 3,
596 };
597
d1e9b7c1 598 switch (id) {
bc9028e1
AK		 599 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
600 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
601 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
602 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 603 default:
604 *len = 0;
605 return NULL;
2028c71d 606 }
d1e9b7c1
SN		 607}
608EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
609
0996517c
HV		 610/* Return the control name. */
611const char *v4l2_ctrl_get_name(u32 id)
612{
613 switch (id) {
614 /* USER controls */
59253f29 615 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 616 case V4L2_CID_USER_CLASS: return "User Controls";
617 case V4L2_CID_BRIGHTNESS: return "Brightness";
618 case V4L2_CID_CONTRAST: return "Contrast";
619 case V4L2_CID_SATURATION: return "Saturation";
620 case V4L2_CID_HUE: return "Hue";
621 case V4L2_CID_AUDIO_VOLUME: return "Volume";
622 case V4L2_CID_AUDIO_BALANCE: return "Balance";
623 case V4L2_CID_AUDIO_BASS: return "Bass";
624 case V4L2_CID_AUDIO_TREBLE: return "Treble";
625 case V4L2_CID_AUDIO_MUTE: return "Mute";
626 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 627 case V4L2_CID_BLACK_LEVEL: return "Black Level";
628 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
629 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
630 case V4L2_CID_RED_BALANCE: return "Red Balance";
631 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
632 case V4L2_CID_GAMMA: return "Gamma";
633 case V4L2_CID_EXPOSURE: return "Exposure";
634 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
635 case V4L2_CID_GAIN: return "Gain";
636 case V4L2_CID_HFLIP: return "Horizontal Flip";
637 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 638 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
639 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
640 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
641 case V4L2_CID_SHARPNESS: return "Sharpness";
642 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
643 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 644 case V4L2_CID_COLOR_KILLER: return "Color Killer";
645 case V4L2_CID_COLORFX: return "Color Effects";
646 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
647 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
648 case V4L2_CID_ROTATE: return "Rotate";
649 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 650 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 651 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
652 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 653 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
654 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 655 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 656 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 657
bc9028e1
AK		 658 /* Codec controls */
659 /* The MPEG controls are applicable to all codec controls
660 * and the 'MPEG' part of the define is historical */
6c8d6111 661 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 662 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 663 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
664 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
665 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
666 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
667 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 668 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
669 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
670 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 671 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 672 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
673 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
674 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
675 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
676 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 677 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 678 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
679 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
680 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
681 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
682 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 683 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
684 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 685 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
686 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
687 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
688 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
689 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
690 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
691 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
692 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
693 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 694 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 695 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 696 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 697 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
698 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 699 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 700 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
701 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
702 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 703 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 704 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 705 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
706 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 707 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
708 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
709 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 710 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
711 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 712 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
713 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
714 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
715 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 716 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
717 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 718 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
719 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
720 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
721 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
722 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
723 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
724 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
725 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
726 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 727 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
728 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
729 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
730 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
731 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
732 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
733 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
734 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
735 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
736 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
737 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
738 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
739 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
740 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
741 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
742 return "H264 Set QP Value for HC Layers";
064f5096 743 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 744 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
745 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 746 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
747 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
748 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
749 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
750 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 751 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
752 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
753 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 754 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 755 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
756 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 757 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 758 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
759 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 760 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
cedc1210 761 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
0996517c 762
bc9028e1
AK		 763 /* VPX controls */
764 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
765 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
766 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
767 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
768 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
769 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
770 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 771 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
772 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
773 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
774 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 775 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 776
0996517c 777 /* CAMERA controls */
59253f29 778 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 779 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
780 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
781 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
782 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
783 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
784 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
785 case V4L2_CID_PAN_RESET: return "Pan, Reset";
786 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
787 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
788 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
789 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
790 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 791 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 792 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
793 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
794 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
795 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 796 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
797 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 798 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 799 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 800 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 801 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 802 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
803 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 804 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 805 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 806 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 807 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
808 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
809 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
810 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 811 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
812 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 813
59253f29
HV		 814 /* FM Radio Modulator controls */
815 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 816 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
817 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
818 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
819 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
820 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
821 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 822 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
823 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
824 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
825 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
826 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
827 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
828 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
829 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
830 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 831 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
832 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
833 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 834 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 835 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
836 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
837 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
838 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
839 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
840 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
841 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 842 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 843 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
844 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
845
0b159acd 846 /* Flash controls */
59253f29 847 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 848 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
849 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
850 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 851 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 852 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
853 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
854 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
855 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
856 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
857 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 858 case V4L2_CID_FLASH_FAULT: return "Faults";
859 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 860 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 861
c7361ae1 862 /* JPEG encoder controls */
59253f29 863 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 864 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
865 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
866 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
867 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
868 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
869
8c9d236e 870 /* Image source controls */
59253f29 871 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 872 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
873 case V4L2_CID_VBLANK: return "Vertical Blanking";
874 case V4L2_CID_HBLANK: return "Horizontal Blanking";
875 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 876 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
877 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
878 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
879 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 880
c643ee13 881 /* Image processing controls */
59253f29 882 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 883 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
884 case V4L2_CID_LINK_FREQ: return "Link Frequency";
885 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 886 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 887
977ebec7 888 /* DV controls */
59253f29 889 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 890 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
891 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
892 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
893 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
894 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
895 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
45cc29af 896 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
977ebec7
HV		 897 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
898 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
45cc29af 899 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
977ebec7 900
aec330a8
AS		 901 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
902 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
903 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad 904 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
41018cb8 905 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
80807fad
AP		 906 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
907 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
908 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
909 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
910 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
911 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 912 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
913 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 914 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 915 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
916 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
917 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
918 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
919 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
920 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 921
922 /* Detection controls */
923 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
924 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
925 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
926 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
927 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
928 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 929 default:
930 return NULL;
931 }
932}
933EXPORT_SYMBOL(v4l2_ctrl_get_name);
934
935void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 936 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 937{
938 *name = v4l2_ctrl_get_name(id);
939 *flags = 0;
940
941 switch (id) {
942 case V4L2_CID_AUDIO_MUTE:
943 case V4L2_CID_AUDIO_LOUDNESS:
944 case V4L2_CID_AUTO_WHITE_BALANCE:
945 case V4L2_CID_AUTOGAIN:
946 case V4L2_CID_HFLIP:
947 case V4L2_CID_VFLIP:
948 case V4L2_CID_HUE_AUTO:
949 case V4L2_CID_CHROMA_AGC:
950 case V4L2_CID_COLOR_KILLER:
a2f8b84f 951 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 952 case V4L2_CID_MPEG_AUDIO_MUTE:
953 case V4L2_CID_MPEG_VIDEO_MUTE:
954 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
955 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
956 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
957 case V4L2_CID_FOCUS_AUTO:
958 case V4L2_CID_PRIVACY:
959 case V4L2_CID_AUDIO_LIMITER_ENABLED:
960 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
961 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 962 case V4L2_CID_ILLUMINATORS_1:
963 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 964 case V4L2_CID_FLASH_STROBE_STATUS:
965 case V4L2_CID_FLASH_CHARGE:
966 case V4L2_CID_FLASH_READY:
064f5096
KD		 967 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
968 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
969 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
970 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
971 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
972 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
973 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 974 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 975 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 976 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 977 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 978 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
979 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
980 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 981 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 982 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 983 case V4L2_CID_RDS_TX_MONO_STEREO:
984 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
985 case V4L2_CID_RDS_TX_COMPRESSED:
986 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
987 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
988 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
989 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
990 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 991 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
992 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
993 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 994 *type = V4L2_CTRL_TYPE_BOOLEAN;
995 *min = 0;
996 *max = *step = 1;
997 break;
bf0bedd3
AG		 998 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
999 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1000 *type = V4L2_CTRL_TYPE_INTEGER;
1001 break;
cedc1210 1002 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
0996517c
HV		 1003 case V4L2_CID_PAN_RESET:
1004 case V4L2_CID_TILT_RESET:
0b159acd
SA		 1005 case V4L2_CID_FLASH_STROBE:
1006 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 1007 case V4L2_CID_AUTO_FOCUS_START:
1008 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 1009 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RR		 1010 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1011 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1012 *min = *max = *step = *def = 0;
1013 break;
1014 case V4L2_CID_POWER_LINE_FREQUENCY:
1015 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1016 case V4L2_CID_MPEG_AUDIO_ENCODING:
1017 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1018 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1019 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1020 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1021 case V4L2_CID_MPEG_AUDIO_MODE:
1022 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1023 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1024 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1025 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1026 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1027 case V4L2_CID_MPEG_VIDEO_ENCODING:
1028 case V4L2_CID_MPEG_VIDEO_ASPECT:
1029 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1030 case V4L2_CID_MPEG_STREAM_TYPE:
1031 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1032 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1033 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1034 case V4L2_CID_COLORFX:
e40a0573 1035 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1036 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1037 case V4L2_CID_FLASH_LED_MODE:
1038 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1039 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1040 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1041 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1042 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1043 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1044 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1045 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1046 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1047 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1048 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1049 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1050 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1051 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1052 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1053 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1054 case V4L2_CID_DV_TX_MODE:
1055 case V4L2_CID_DV_TX_RGB_RANGE:
45cc29af 1056 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
977ebec7 1057 case V4L2_CID_DV_RX_RGB_RANGE:
45cc29af 1058 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
5ebef0fb 1059 case V4L2_CID_TEST_PATTERN:
aec330a8 1060 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1061 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
a77b4fc0 1062 case V4L2_CID_DETECT_MD_MODE:
0996517c
HV		 1063 *type = V4L2_CTRL_TYPE_MENU;
1064 break;
c643ee13
SA		 1065 case V4L2_CID_LINK_FREQ:
1066 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1067 break;
0996517c
HV		 1068 case V4L2_CID_RDS_TX_PS_NAME:
1069 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1070 case V4L2_CID_RDS_RX_PS_NAME:
1071 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1072 *type = V4L2_CTRL_TYPE_STRING;
1073 break;
7f84ad8b 1074 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1075 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1076 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1077 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1078 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1079 break;
0996517c
HV		 1080 case V4L2_CID_USER_CLASS:
1081 case V4L2_CID_CAMERA_CLASS:
1082 case V4L2_CID_MPEG_CLASS:
1083 case V4L2_CID_FM_TX_CLASS:
0b159acd 1084 case V4L2_CID_FLASH_CLASS:
c7361ae1 1085 case V4L2_CID_JPEG_CLASS:
8c9d236e 1086 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1087 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1088 case V4L2_CID_DV_CLASS:
aec330a8 1089 case V4L2_CID_FM_RX_CLASS:
80807fad 1090 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1091 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1092 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1093 /* You can neither read not write these */
1094 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1095 *min = *max = *step = *def = 0;
1096 break;
1097 case V4L2_CID_BG_COLOR:
1098 *type = V4L2_CTRL_TYPE_INTEGER;
1099 *step = 1;
1100 *min = 0;
1101 /* Max is calculated as RGB888 that is 2^24 */
1102 *max = 0xFFFFFF;
1103 break;
0b159acd 1104 case V4L2_CID_FLASH_FAULT:
c7361ae1 1105 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1106 case V4L2_CID_3A_LOCK:
2272ab65 1107 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1108 case V4L2_CID_DV_TX_HOTPLUG:
1109 case V4L2_CID_DV_TX_RXSENSE:
1110 case V4L2_CID_DV_TX_EDID_PRESENT:
1111 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1112 *type = V4L2_CTRL_TYPE_BITMASK;
1113 break;
064f5096
KD		 1114 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1115 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1116 *type = V4L2_CTRL_TYPE_INTEGER;
1117 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1118 break;
24c19a21 1119 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1120 *type = V4L2_CTRL_TYPE_INTEGER64;
1121 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1122 *min = *def = 0;
1123 *max = 0x1ffffffffLL;
1124 *step = 1;
1125 break;
1126 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1127 *type = V4L2_CTRL_TYPE_INTEGER64;
1128 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1129 *min = *def = 0;
1130 *max = 0x7fffffffffffffffLL;
1131 *step = 1;
1132 break;
c643ee13 1133 case V4L2_CID_PIXEL_RATE:
24c19a21 1134 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1135 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1136 break;
a77b4fc0
HV		 1137 case V4L2_CID_DETECT_MD_REGION_GRID:
1138 *type = V4L2_CTRL_TYPE_U8;
1139 break;
1140 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1141 *type = V4L2_CTRL_TYPE_U16;
1142 break;
811c5081
HV		 1143 case V4L2_CID_RDS_TX_ALT_FREQS:
1144 *type = V4L2_CTRL_TYPE_U32;
1145 break;
0996517c
HV		 1146 default:
1147 *type = V4L2_CTRL_TYPE_INTEGER;
1148 break;
1149 }
1150 switch (id) {
1151 case V4L2_CID_MPEG_AUDIO_ENCODING:
1152 case V4L2_CID_MPEG_AUDIO_MODE:
1153 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1154 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1155 case V4L2_CID_MPEG_STREAM_TYPE:
1156 *flags |= V4L2_CTRL_FLAG_UPDATE;
1157 break;
1158 case V4L2_CID_AUDIO_VOLUME:
1159 case V4L2_CID_AUDIO_BALANCE:
1160 case V4L2_CID_AUDIO_BASS:
1161 case V4L2_CID_AUDIO_TREBLE:
1162 case V4L2_CID_BRIGHTNESS:
1163 case V4L2_CID_CONTRAST:
1164 case V4L2_CID_SATURATION:
1165 case V4L2_CID_HUE:
1166 case V4L2_CID_RED_BALANCE:
1167 case V4L2_CID_BLUE_BALANCE:
1168 case V4L2_CID_GAMMA:
1169 case V4L2_CID_SHARPNESS:
1170 case V4L2_CID_CHROMA_GAIN:
1171 case V4L2_CID_RDS_TX_DEVIATION:
1172 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1173 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1174 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1175 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1176 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1177 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1178 case V4L2_CID_PILOT_TONE_DEVIATION:
1179 case V4L2_CID_PILOT_TONE_FREQUENCY:
1180 case V4L2_CID_TUNE_POWER_LEVEL:
1181 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
41018cb8 1182 case V4L2_CID_RF_TUNER_RF_GAIN:
80807fad
AP		 1183 case V4L2_CID_RF_TUNER_LNA_GAIN:
1184 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1185 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1186 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1187 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1188 *flags |= V4L2_CTRL_FLAG_SLIDER;
1189 break;
1190 case V4L2_CID_PAN_RELATIVE:
1191 case V4L2_CID_TILT_RELATIVE:
1192 case V4L2_CID_FOCUS_RELATIVE:
1193 case V4L2_CID_IRIS_RELATIVE:
1194 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RR		 1195 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1196 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1197 break;
0b159acd 1198 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1199 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1200 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1201 case V4L2_CID_DV_TX_HOTPLUG:
1202 case V4L2_CID_DV_TX_RXSENSE:
1203 case V4L2_CID_DV_TX_EDID_PRESENT:
1204 case V4L2_CID_DV_RX_POWER_PRESENT:
45cc29af 1205 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
9570a148
HV		 1206 case V4L2_CID_RDS_RX_PTY:
1207 case V4L2_CID_RDS_RX_PS_NAME:
1208 case V4L2_CID_RDS_RX_RADIO_TEXT:
1209 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1210 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1211 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1212 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1213 break;
9aa4357e
AP		 1214 case V4L2_CID_RF_TUNER_PLL_LOCK:
1215 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1216 break;
0996517c
HV		 1217 }
1218}
1219EXPORT_SYMBOL(v4l2_ctrl_fill);
1220
6e239399
HV		 1221static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1222{
1223 memset(ev->reserved, 0, sizeof(ev->reserved));
1224 ev->type = V4L2_EVENT_CTRL;
1225 ev->id = ctrl->id;
1226 ev->u.ctrl.changes = changes;
1227 ev->u.ctrl.type = ctrl->type;
1228 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1229 if (ctrl->is_ptr)
6e239399
HV		 1230 ev->u.ctrl.value64 = 0;
1231 else
2a9ec373 1232 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1233 ev->u.ctrl.minimum = ctrl->minimum;
1234 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1235 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1236 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1237 ev->u.ctrl.step = 1;
1238 else
1239 ev->u.ctrl.step = ctrl->step;
1240 ev->u.ctrl.default_value = ctrl->default_value;
1241}
1242
1243static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1244{
1245 struct v4l2_event ev;
77068d36 1246 struct v4l2_subscribed_event *sev;
6e239399 1247
77068d36 1248 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1249 return;
6e239399
HV		 1250 fill_event(&ev, ctrl, changes);
1251
77068d36 1252 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1253 if (sev->fh != fh ||
1254 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1255 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1256}
1257
998e7659 1258static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1259 union v4l2_ctrl_ptr ptr1,
1260 union v4l2_ctrl_ptr ptr2)
1261{
1262 switch (ctrl->type) {
1263 case V4L2_CTRL_TYPE_BUTTON:
1264 return false;
1265 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1266 idx *= ctrl->elem_size;
0176077a 1267 /* strings are always 0-terminated */
265c7f8a 1268 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1269 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1270 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1271 case V4L2_CTRL_TYPE_U8:
1272 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1273 case V4L2_CTRL_TYPE_U16:
1274 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1275 case V4L2_CTRL_TYPE_U32:
1276 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1277 default:
265c7f8a
HV		 1278 if (ctrl->is_int)
1279 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1280 idx *= ctrl->elem_size;
1281 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1282 }
1283}
1284
998e7659 1285static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1286 union v4l2_ctrl_ptr ptr)
1287{
1288 switch (ctrl->type) {
1289 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1290 idx *= ctrl->elem_size;
1291 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1292 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1293 break;
1294 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1295 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1296 break;
1297 case V4L2_CTRL_TYPE_INTEGER:
1298 case V4L2_CTRL_TYPE_INTEGER_MENU:
1299 case V4L2_CTRL_TYPE_MENU:
1300 case V4L2_CTRL_TYPE_BITMASK:
1301 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1302 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1303 break;
dda4a4d5
HV		 1304 case V4L2_CTRL_TYPE_U8:
1305 ptr.p_u8[idx] = ctrl->default_value;
1306 break;
1307 case V4L2_CTRL_TYPE_U16:
1308 ptr.p_u16[idx] = ctrl->default_value;
1309 break;
811c5081
HV		 1310 case V4L2_CTRL_TYPE_U32:
1311 ptr.p_u32[idx] = ctrl->default_value;
1312 break;
0176077a 1313 default:
302ab7ce
HV		 1314 idx *= ctrl->elem_size;
1315 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1316 break;
1317 }
1318}
1319
1320static void std_log(const struct v4l2_ctrl *ctrl)
1321{
1322 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1323
998e7659
HV		 1324 if (ctrl->is_array) {
1325 unsigned i;
1326
1327 for (i = 0; i < ctrl->nr_of_dims; i++)
1328 pr_cont("[%u]", ctrl->dims[i]);
1329 pr_cont(" ");
1330 }
1331
0176077a
HV		 1332 switch (ctrl->type) {
1333 case V4L2_CTRL_TYPE_INTEGER:
1334 pr_cont("%d", *ptr.p_s32);
1335 break;
1336 case V4L2_CTRL_TYPE_BOOLEAN:
1337 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1338 break;
1339 case V4L2_CTRL_TYPE_MENU:
1340 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1341 break;
1342 case V4L2_CTRL_TYPE_INTEGER_MENU:
1343 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1344 break;
1345 case V4L2_CTRL_TYPE_BITMASK:
1346 pr_cont("0x%08x", *ptr.p_s32);
1347 break;
1348 case V4L2_CTRL_TYPE_INTEGER64:
1349 pr_cont("%lld", *ptr.p_s64);
1350 break;
1351 case V4L2_CTRL_TYPE_STRING:
1352 pr_cont("%s", ptr.p_char);
1353 break;
dda4a4d5
HV		 1354 case V4L2_CTRL_TYPE_U8:
1355 pr_cont("%u", (unsigned)*ptr.p_u8);
1356 break;
1357 case V4L2_CTRL_TYPE_U16:
1358 pr_cont("%u", (unsigned)*ptr.p_u16);
1359 break;
811c5081
HV		 1360 case V4L2_CTRL_TYPE_U32:
1361 pr_cont("%u", (unsigned)*ptr.p_u32);
1362 break;
0176077a
HV		 1363 default:
1364 pr_cont("unknown type %d", ctrl->type);
1365 break;
1366 }
1367}
1368
958c7c7e
HV		 1369/*
1370 * Round towards the closest legal value. Be careful when we are
1371 * close to the maximum range of the control type to prevent
1372 * wrap-arounds.
1373 */
0176077a
HV		 1374#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1375({ \
1376 offset_type offset; \
958c7c7e 1377 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1378 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1379 val = (ctrl)->maximum; \
1380 else \
9c9cb1fa 1381 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1382 val = clamp_t(typeof(val), val, \
1383 (ctrl)->minimum, (ctrl)->maximum); \
1384 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1385 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1386 val = (ctrl)->minimum + offset; \
1387 0; \
1388})
1389
1390/* Validate a new control */
998e7659 1391static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1392 union v4l2_ctrl_ptr ptr)
1393{
1394 size_t len;
0d5e8c43
HV		 1395 u64 offset;
1396 s64 val;
0176077a
HV		 1397
1398 switch (ctrl->type) {
1399 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1400 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1401 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1402 /*
1403 * We can't use the ROUND_TO_RANGE define here due to
1404 * the u64 divide that needs special care.
1405 */
1406 val = ptr.p_s64[idx];
9c9cb1fa 1407 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1408 val = ctrl->maximum;
1409 else
9c9cb1fa 1410 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1411 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1412 offset = val - ctrl->minimum;
1413 do_div(offset, ctrl->step);
1414 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1415 return 0;
dda4a4d5
HV		 1416 case V4L2_CTRL_TYPE_U8:
1417 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1418 case V4L2_CTRL_TYPE_U16:
1419 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1420 case V4L2_CTRL_TYPE_U32:
1421 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1422
1423 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1424 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1425 return 0;
1426
1427 case V4L2_CTRL_TYPE_MENU:
1428 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1429 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1430 return -ERANGE;
265c7f8a 1431 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1432 return -EINVAL;
1433 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1434 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1435 return -EINVAL;
1436 return 0;
1437
1438 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1439 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1440 return 0;
1441
1442 case V4L2_CTRL_TYPE_BUTTON:
1443 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1444 ptr.p_s32[idx] = 0;
0176077a
HV		 1445 return 0;
1446
1447 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1448 idx *= ctrl->elem_size;
1449 len = strlen(ptr.p_char + idx);
0176077a
HV		 1450 if (len < ctrl->minimum)
1451 return -ERANGE;
0d5e8c43 1452 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1453 return -ERANGE;
1454 return 0;
1455
1456 default:
1457 return -EINVAL;
1458 }
1459}
1460
1461static const struct v4l2_ctrl_type_ops std_type_ops = {
1462 .equal = std_equal,
1463 .init = std_init,
1464 .log = std_log,
1465 .validate = std_validate,
1466};
1467
000e4f9a
HV		 1468/* Helper function: copy the given control value back to the caller */
1469static int ptr_to_user(struct v4l2_ext_control *c,
1470 struct v4l2_ctrl *ctrl,
1471 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1472{
1473 u32 len;
1474
d9a25471 1475 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1476 return copy_to_user(c->ptr, ptr.p, c->size) ?
1477 -EFAULT : 0;
d9a25471 1478
0996517c
HV		 1479 switch (ctrl->type) {
1480 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1481 len = strlen(ptr.p_char);
0996517c 1482 if (c->size < len + 1) {
c336f75e 1483 c->size = ctrl->elem_size;
0996517c
HV		 1484 return -ENOSPC;
1485 }
000e4f9a 1486 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1487 -EFAULT : 0;
0996517c 1488 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1489 c->value64 = *ptr.p_s64;
0996517c
HV		 1490 break;
1491 default:
000e4f9a 1492 c->value = *ptr.p_s32;
0996517c
HV		 1493 break;
1494 }
1495 return 0;
1496}
1497
000e4f9a
HV		 1498/* Helper function: copy the current control value back to the caller */
1499static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1500 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1501{
1502 return ptr_to_user(c, ctrl, ctrl->p_cur);
1503}
1504
1505/* Helper function: copy the new control value back to the caller */
1506static int new_to_user(struct v4l2_ext_control *c,
1507 struct v4l2_ctrl *ctrl)
1508{
1509 return ptr_to_user(c, ctrl, ctrl->p_new);
1510}
1511
953eae5d
RR		 1512/* Helper function: copy the initial control value back to the caller */
1513static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1514{
1515 int idx;
1516
1517 for (idx = 0; idx < ctrl->elems; idx++)
1518 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1519
1520 return ptr_to_user(c, ctrl, ctrl->p_new);
1521}
1522
000e4f9a
HV		 1523/* Helper function: copy the caller-provider value to the given control value */
1524static int user_to_ptr(struct v4l2_ext_control *c,
1525 struct v4l2_ctrl *ctrl,
1526 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1527{
1528 int ret;
1529 u32 size;
1530
2a863793 1531 ctrl->is_new = 1;
302ab7ce
HV		 1532 if (ctrl->is_ptr && !ctrl->is_string) {
1533 unsigned idx;
1534
40265bbe 1535 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1536 if (ret || !ctrl->is_array)
1537 return ret;
1538 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1539 ctrl->type_ops->init(ctrl, idx, ptr);
1540 return 0;
1541 }
d9a25471 1542
0996517c
HV		 1543 switch (ctrl->type) {
1544 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1545 *ptr.p_s64 = c->value64;
0996517c
HV		 1546 break;
1547 case V4L2_CTRL_TYPE_STRING:
1548 size = c->size;
1549 if (size == 0)
1550 return -ERANGE;
1551 if (size > ctrl->maximum + 1)
1552 size = ctrl->maximum + 1;
40265bbe 1553 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1554 if (!ret) {
000e4f9a 1555 char last = ptr.p_char[size - 1];
0996517c 1556
000e4f9a 1557 ptr.p_char[size - 1] = 0;
0996517c
HV		 1558 /* If the string was longer than ctrl->maximum,
1559 then return an error. */
000e4f9a 1560 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1561 return -ERANGE;
1562 }
40265bbe 1563 return ret;
0996517c 1564 default:
000e4f9a 1565 *ptr.p_s32 = c->value;
0996517c
HV		 1566 break;
1567 }
1568 return 0;
1569}
1570
000e4f9a
HV		 1571/* Helper function: copy the caller-provider value as the new control value */
1572static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1573 struct v4l2_ctrl *ctrl)
1574{
000e4f9a
HV		 1575 return user_to_ptr(c, ctrl, ctrl->p_new);
1576}
d9a25471 1577
000e4f9a
HV		 1578/* Copy the one value to another. */
1579static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1580 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1581{
1582 if (ctrl == NULL)
1583 return;
302ab7ce 1584 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1585}
1586
1587/* Copy the new value to the current value. */
2ccbe779 1588static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1589{
000e4f9a 1590 bool changed;
6e239399 1591
0996517c
HV		 1592 if (ctrl == NULL)
1593 return;
9ea1b7a4
HV		 1594
1595 /* has_changed is set by cluster_changed */
1596 changed = ctrl->has_changed;
1597 if (changed)
1598 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1599
2ccbe779
SN		 1600 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1601 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1602 ctrl->flags &=
1603 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1604 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1605 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1606 if (ctrl->cluster[0]->has_volatiles)
1607 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1608 }
1249a3a8 1609 fh = NULL;
72d877ca 1610 }
2ccbe779 1611 if (changed || ch_flags) {
639884a6
HV		 1612 /* If a control was changed that was not one of the controls
1613 modified by the application, then send the event to all. */
1614 if (!ctrl->is_new)
1615 fh = NULL;
6e239399 1616 send_event(fh, ctrl,
2ccbe779 1617 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1618 if (ctrl->call_notify && changed && ctrl->handler->notify)
1619 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1620 }
0996517c
HV		 1621}
1622
1623/* Copy the current value to the new value */
1624static void cur_to_new(struct v4l2_ctrl *ctrl)
1625{
1626 if (ctrl == NULL)
1627 return;
000e4f9a 1628 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1629}
1630
1631/* Return non-zero if one or more of the controls in the cluster has a new
1632 value that differs from the current value. */
1633static int cluster_changed(struct v4l2_ctrl *master)
1634{
9ea1b7a4 1635 bool changed = false;
302ab7ce 1636 unsigned idx;
0996517c
HV		 1637 int i;
1638
9ea1b7a4 1639 for (i = 0; i < master->ncontrols; i++) {
0996517c 1640 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1641 bool ctrl_changed = false;
0996517c
HV		 1642
1643 if (ctrl == NULL)
1644 continue;
45f014c5
RR		 1645
1646 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1647 changed = ctrl_changed = true;
1648
b08d8d26
RR		 1649 /*
1650 * Set has_changed to false to avoid generating
1651 * the event V4L2_EVENT_CTRL_CH_VALUE
1652 */
1653 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1654 ctrl->has_changed = false;
1655 continue;
1656 }
1657
302ab7ce
HV		 1658 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1659 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1660 ctrl->p_cur, ctrl->p_new);
302ab7ce 1661 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1662 changed |= ctrl->has_changed;
0996517c 1663 }
9ea1b7a4 1664 return changed;
0996517c
HV		 1665}
1666
2ccbe779
SN		 1667/* Control range checking */
1668static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1669 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1670{
1671 switch (type) {
1672 case V4L2_CTRL_TYPE_BOOLEAN:
1673 if (step != 1 || max > 1 || min < 0)
1674 return -ERANGE;
1675 /* fall through */
dda4a4d5
HV		 1676 case V4L2_CTRL_TYPE_U8:
1677 case V4L2_CTRL_TYPE_U16:
811c5081 1678 case V4L2_CTRL_TYPE_U32:
2ccbe779 1679 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1680 case V4L2_CTRL_TYPE_INTEGER64:
1681 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1682 return -ERANGE;
1683 return 0;
1684 case V4L2_CTRL_TYPE_BITMASK:
1685 if (step || min || !max || (def & ~max))
1686 return -ERANGE;
1687 return 0;
1688 case V4L2_CTRL_TYPE_MENU:
1689 case V4L2_CTRL_TYPE_INTEGER_MENU:
1690 if (min > max || def < min || def > max)
1691 return -ERANGE;
1692 /* Note: step == menu_skip_mask for menu controls.
1693 So here we check if the default value is masked out. */
1694 if (step && ((1 << def) & step))
1695 return -EINVAL;
1696 return 0;
1697 case V4L2_CTRL_TYPE_STRING:
1698 if (min > max || min < 0 || step < 1 || def)
1699 return -ERANGE;
1700 return 0;
1701 default:
1702 return 0;
1703 }
1704}
1705
03d5285b 1706/* Validate a new control */
7a7f1ab3 1707static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1708{
302ab7ce
HV		 1709 unsigned idx;
1710 int err = 0;
1711
7a7f1ab3
HV		 1712 for (idx = 0; !err && idx < ctrl->elems; idx++)
1713 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1714 return err;
0996517c
HV		 1715}
1716
1717static inline u32 node2id(struct list_head *node)
1718{
1719 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1720}
1721
1722/* Set the handler's error code if it wasn't set earlier already */
1723static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1724{
1725 if (hdl->error == 0)
1726 hdl->error = err;
1727 return err;
1728}
1729
1730/* Initialize the handler */
6cd247ef
AW		 1731int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1732 unsigned nr_of_controls_hint,
1733 struct lock_class_key *key, const char *name)
0996517c 1734{
77e7c4e6
SA		 1735 hdl->lock = &hdl->_lock;
1736 mutex_init(hdl->lock);
6cd247ef 1737 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1738 INIT_LIST_HEAD(&hdl->ctrls);
1739 INIT_LIST_HEAD(&hdl->ctrl_refs);
1740 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1741 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1742 GFP_KERNEL);
0996517c
HV		 1743 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1744 return hdl->error;
1745}
6cd247ef 1746EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1747
1748/* Free all controls and control refs */
1749void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1750{
1751 struct v4l2_ctrl_ref *ref, *next_ref;
1752 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1753 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1754
1755 if (hdl == NULL || hdl->buckets == NULL)
1756 return;
1757
77e7c4e6 1758 mutex_lock(hdl->lock);
0996517c
HV		 1759 /* Free all nodes */
1760 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1761 list_del(&ref->node);
1762 kfree(ref);
1763 }
1764 /* Free all controls owned by the handler */
1765 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1766 list_del(&ctrl->node);
77068d36
HV		 1767 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1768 list_del(&sev->node);
0996517c
HV		 1769 kfree(ctrl);
1770 }
1771 kfree(hdl->buckets);
1772 hdl->buckets = NULL;
1773 hdl->cached = NULL;
1774 hdl->error = 0;
77e7c4e6 1775 mutex_unlock(hdl->lock);
0996517c
HV		 1776}
1777EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1778
1779/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1780 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1781 with applications that do not use the NEXT_CTRL flag.
1782
1783 We just find the n-th private user control. It's O(N), but that should not
1784 be an issue in this particular case. */
1785static struct v4l2_ctrl_ref *find_private_ref(
1786 struct v4l2_ctrl_handler *hdl, u32 id)
1787{
1788 struct v4l2_ctrl_ref *ref;
1789
1790 id -= V4L2_CID_PRIVATE_BASE;
1791 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1792 /* Search for private user controls that are compatible with
1793 VIDIOC_G/S_CTRL. */
0f8017be 1794 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 1795 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1796 if (!ref->ctrl->is_int)
0996517c
HV		 1797 continue;
1798 if (id == 0)
1799 return ref;
1800 id--;
1801 }
1802 }
1803 return NULL;
1804}
1805
1806/* Find a control with the given ID. */
1807static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1808{
1809 struct v4l2_ctrl_ref *ref;
1810 int bucket;
1811
1812 id &= V4L2_CTRL_ID_MASK;
1813
1814 /* Old-style private controls need special handling */
1815 if (id >= V4L2_CID_PRIVATE_BASE)
1816 return find_private_ref(hdl, id);
1817 bucket = id % hdl->nr_of_buckets;
1818
1819 /* Simple optimization: cache the last control found */
1820 if (hdl->cached && hdl->cached->ctrl->id == id)
1821 return hdl->cached;
1822
1823 /* Not in cache, search the hash */
1824 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1825 while (ref && ref->ctrl->id != id)
1826 ref = ref->next;
1827
1828 if (ref)
1829 hdl->cached = ref; /* cache it! */
1830 return ref;
1831}
1832
1833/* Find a control with the given ID. Take the handler's lock first. */
1834static struct v4l2_ctrl_ref *find_ref_lock(
1835 struct v4l2_ctrl_handler *hdl, u32 id)
1836{
1837 struct v4l2_ctrl_ref *ref = NULL;
1838
1839 if (hdl) {
77e7c4e6 1840 mutex_lock(hdl->lock);
0996517c 1841 ref = find_ref(hdl, id);
77e7c4e6 1842 mutex_unlock(hdl->lock);
0996517c
HV		 1843 }
1844 return ref;
1845}
1846
1847/* Find a control with the given ID. */
1848struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1849{
1850 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1851
1852 return ref ? ref->ctrl : NULL;
1853}
1854EXPORT_SYMBOL(v4l2_ctrl_find);
1855
1856/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1857static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1858 struct v4l2_ctrl *ctrl)
1859{
1860 struct v4l2_ctrl_ref *ref;
1861 struct v4l2_ctrl_ref *new_ref;
1862 u32 id = ctrl->id;
0f8017be 1863 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c
HV		 1864 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1865
d9a25471
HV		 1866 /*
1867 * Automatically add the control class if it is not yet present and
1868 * the new control is not a compound control.
1869 */
1870 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1871 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1872 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1873 return hdl->error;
1874
1875 if (hdl->error)
1876 return hdl->error;
1877
1878 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1879 if (!new_ref)
1880 return handler_set_err(hdl, -ENOMEM);
1881 new_ref->ctrl = ctrl;
1882 if (ctrl->handler == hdl) {
1883 /* By default each control starts in a cluster of its own.
1884 new_ref->ctrl is basically a cluster array with one
1885 element, so that's perfect to use as the cluster pointer.
1886 But only do this for the handler that owns the control. */
1887 ctrl->cluster = &new_ref->ctrl;
1888 ctrl->ncontrols = 1;
1889 }
1890
1891 INIT_LIST_HEAD(&new_ref->node);
1892
77e7c4e6 1893 mutex_lock(hdl->lock);
0996517c
HV		 1894
1895 /* Add immediately at the end of the list if the list is empty, or if
1896 the last element in the list has a lower ID.
1897 This ensures that when elements are added in ascending order the
1898 insertion is an O(1) operation. */
1899 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1900 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1901 goto insert_in_hash;
1902 }
1903
1904 /* Find insert position in sorted list */
1905 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1906 if (ref->ctrl->id < id)
1907 continue;
1908 /* Don't add duplicates */
1909 if (ref->ctrl->id == id) {
1910 kfree(new_ref);
1911 goto unlock;
1912 }
1913 list_add(&new_ref->node, ref->node.prev);
1914 break;
1915 }
1916
1917insert_in_hash:
1918 /* Insert the control node in the hash */
1919 new_ref->next = hdl->buckets[bucket];
1920 hdl->buckets[bucket] = new_ref;
1921
1922unlock:
77e7c4e6 1923 mutex_unlock(hdl->lock);
0996517c
HV		 1924 return 0;
1925}
1926
1927/* Add a new control */
1928static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1929 const struct v4l2_ctrl_ops *ops,
0176077a 1930 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1931 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1932 s64 min, s64 max, u64 step, s64 def,
20d88eef 1933 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1934 u32 flags, const char * const *qmenu,
1935 const s64 *qmenu_int, void *priv)
0996517c
HV		 1936{
1937 struct v4l2_ctrl *ctrl;
d9a25471 1938 unsigned sz_extra;
20d88eef
HV		 1939 unsigned nr_of_dims = 0;
1940 unsigned elems = 1;
998e7659
HV		 1941 bool is_array;
1942 unsigned tot_ctrl_size;
302ab7ce 1943 unsigned idx;
d9a25471 1944 void *data;
2ccbe779 1945 int err;
0996517c
HV		 1946
1947 if (hdl->error)
1948 return NULL;
1949
20d88eef
HV		 1950 while (dims && dims[nr_of_dims]) {
1951 elems *= dims[nr_of_dims];
1952 nr_of_dims++;
1953 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1954 break;
1955 }
998e7659 1956 is_array = nr_of_dims > 0;
20d88eef 1957
dda4a4d5
HV		 1958 /* Prefill elem_size for all types handled by std_type_ops */
1959 switch (type) {
1960 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1961 elem_size = sizeof(s64);
dda4a4d5
HV		 1962 break;
1963 case V4L2_CTRL_TYPE_STRING:
d9a25471 1964 elem_size = max + 1;
dda4a4d5
HV		 1965 break;
1966 case V4L2_CTRL_TYPE_U8:
1967 elem_size = sizeof(u8);
1968 break;
1969 case V4L2_CTRL_TYPE_U16:
1970 elem_size = sizeof(u16);
1971 break;
811c5081
HV		 1972 case V4L2_CTRL_TYPE_U32:
1973 elem_size = sizeof(u32);
1974 break;
dda4a4d5
HV		 1975 default:
1976 if (type < V4L2_CTRL_COMPOUND_TYPES)
1977 elem_size = sizeof(s32);
1978 break;
1979 }
998e7659 1980 tot_ctrl_size = elem_size * elems;
d9a25471 1981
0996517c 1982 /* Sanity checks */
998e7659
HV		 1983 if (id == 0 || name == NULL || !elem_size ||
1984 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1985 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1986 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1987 handler_set_err(hdl, -ERANGE);
1988 return NULL;
1989 }
2ccbe779
SN		 1990 err = check_range(type, min, max, step, def);
1991 if (err) {
1992 handler_set_err(hdl, err);
02ac0480
HV		 1993 return NULL;
1994 }
fa4d7096
HV		 1995 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1996 handler_set_err(hdl, -ERANGE);
1997 return NULL;
1998 }
998e7659
HV		 1999 if (is_array &&
2000 (type == V4L2_CTRL_TYPE_BUTTON ||
2001 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2002 handler_set_err(hdl, -EINVAL);
2003 return NULL;
2004 }
0996517c 2005
d9a25471 2006 sz_extra = 0;
0996517c 2007 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 2008 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2009 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 2010 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2011 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 2012 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2013 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 2014 type >= V4L2_CTRL_COMPOUND_TYPES ||
2015 is_array)
2016 sz_extra += 2 * tot_ctrl_size;
0996517c
HV		 2017
2018 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
2019 if (ctrl == NULL) {
2020 handler_set_err(hdl, -ENOMEM);
2021 return NULL;
2022 }
2023
2024 INIT_LIST_HEAD(&ctrl->node);
77068d36 2025 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2026 ctrl->handler = hdl;
2027 ctrl->ops = ops;
0176077a 2028 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2029 ctrl->id = id;
2030 ctrl->name = name;
2031 ctrl->type = type;
2032 ctrl->flags = flags;
2033 ctrl->minimum = min;
2034 ctrl->maximum = max;
2035 ctrl->step = step;
d9a25471 2036 ctrl->default_value = def;
998e7659
HV		 2037 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2038 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2039 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2040 ctrl->is_array = is_array;
20d88eef
HV		 2041 ctrl->elems = elems;
2042 ctrl->nr_of_dims = nr_of_dims;
2043 if (nr_of_dims)
2044 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2045 ctrl->elem_size = elem_size;
ce580fe5
SA		 2046 if (type == V4L2_CTRL_TYPE_MENU)
2047 ctrl->qmenu = qmenu;
2048 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2049 ctrl->qmenu_int = qmenu_int;
0996517c 2050 ctrl->priv = priv;
d9a25471 2051 ctrl->cur.val = ctrl->val = def;
2a9ec373 2052 data = &ctrl[1];
d9a25471 2053
2a9ec373
HV		 2054 if (!ctrl->is_int) {
2055 ctrl->p_new.p = data;
998e7659 2056 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2057 } else {
2058 ctrl->p_new.p = &ctrl->val;
2059 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2060 }
302ab7ce
HV		 2061 for (idx = 0; idx < elems; idx++) {
2062 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2063 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2064 }
0176077a 2065
0996517c
HV		 2066 if (handler_new_ref(hdl, ctrl)) {
2067 kfree(ctrl);
2068 return NULL;
2069 }
77e7c4e6 2070 mutex_lock(hdl->lock);
0996517c 2071 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2072 mutex_unlock(hdl->lock);
0996517c
HV		 2073 return ctrl;
2074}
2075
2076struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2077 const struct v4l2_ctrl_config *cfg, void *priv)
2078{
2079 bool is_menu;
2080 struct v4l2_ctrl *ctrl;
2081 const char *name = cfg->name;
513521ea 2082 const char * const *qmenu = cfg->qmenu;
ce580fe5 2083 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2084 enum v4l2_ctrl_type type = cfg->type;
2085 u32 flags = cfg->flags;
0ba2aeb6
HV		 2086 s64 min = cfg->min;
2087 s64 max = cfg->max;
2088 u64 step = cfg->step;
2089 s64 def = cfg->def;
0996517c
HV		 2090
2091 if (name == NULL)
2092 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2093 &def, &flags);
2094
ce580fe5
SA		 2095 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2096 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2097 if (is_menu)
2098 WARN_ON(step);
2099 else
2100 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2101 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2102 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2103 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2104 qmenu_int == NULL) {
2105 handler_set_err(hdl, -EINVAL);
2106 return NULL;
2107 }
0996517c 2108
0176077a 2109 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2110 type, min, max,
20d88eef
HV		 2111 is_menu ? cfg->menu_skip_mask : step, def,
2112 cfg->dims, cfg->elem_size,
d9a25471 2113 flags, qmenu, qmenu_int, priv);
88365105 2114 if (ctrl)
0996517c 2115 ctrl->is_private = cfg->is_private;
0996517c
HV		 2116 return ctrl;
2117}
2118EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2119
2120/* Helper function for standard non-menu controls */
2121struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2122 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2123 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2124{
2125 const char *name;
2126 enum v4l2_ctrl_type type;
2127 u32 flags;
2128
2129 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2130 if (type == V4L2_CTRL_TYPE_MENU ||
2131 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2132 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2133 handler_set_err(hdl, -EINVAL);
2134 return NULL;
2135 }
0176077a 2136 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2137 min, max, step, def, NULL, 0,
d9a25471 2138 flags, NULL, NULL, NULL);
0996517c
HV		 2139}
2140EXPORT_SYMBOL(v4l2_ctrl_new_std);
2141
2142/* Helper function for standard menu controls */
2143struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2144 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2145 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2146{
d1e9b7c1
SN		 2147 const char * const *qmenu = NULL;
2148 const s64 *qmenu_int = NULL;
fbbb29a6 2149 unsigned int qmenu_int_len = 0;
0996517c
HV		 2150 const char *name;
2151 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2152 s64 min;
2153 s64 max = _max;
2154 s64 def = _def;
2155 u64 step;
0996517c
HV		 2156 u32 flags;
2157
2158 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2159
2160 if (type == V4L2_CTRL_TYPE_MENU)
2161 qmenu = v4l2_ctrl_get_menu(id);
2162 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2163 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2164
2165 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2166 handler_set_err(hdl, -EINVAL);
2167 return NULL;
2168 }
0176077a 2169 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2170 0, max, mask, def, NULL, 0,
d9a25471 2171 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2172}
2173EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2174
117a711a
LP		 2175/* Helper function for standard menu controls with driver defined menu */
2176struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2177 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2178 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2179{
2180 enum v4l2_ctrl_type type;
2181 const char *name;
2182 u32 flags;
0ba2aeb6
HV		 2183 u64 step;
2184 s64 min;
2185 s64 max = _max;
2186 s64 def = _def;
117a711a
LP		 2187
2188 /* v4l2_ctrl_new_std_menu_items() should only be called for
2189 * standard controls without a standard menu.
2190 */
2191 if (v4l2_ctrl_get_menu(id)) {
2192 handler_set_err(hdl, -EINVAL);
2193 return NULL;
2194 }
2195
2196 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2197 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2198 handler_set_err(hdl, -EINVAL);
2199 return NULL;
2200 }
0176077a 2201 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2202 0, max, mask, def, NULL, 0,
2203 flags, qmenu, NULL, NULL);
117a711a
LP		 2204
2205}
2206EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2207
515f3287
SN		 2208/* Helper function for standard integer menu controls */
2209struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2210 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2211 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2212{
2213 const char *name;
2214 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2215 s64 min;
2216 u64 step;
2217 s64 max = _max;
2218 s64 def = _def;
515f3287
SN		 2219 u32 flags;
2220
2221 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2222 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2223 handler_set_err(hdl, -EINVAL);
2224 return NULL;
2225 }
0176077a 2226 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2227 0, max, 0, def, NULL, 0,
d9a25471 2228 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2229}
2230EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2231
0996517c
HV		 2232/* Add the controls from another handler to our own. */
2233int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2234 struct v4l2_ctrl_handler *add,
2235 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2236{
072e6602 2237 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2238 int ret = 0;
2239
2240 /* Do nothing if either handler is NULL or if they are the same */
2241 if (!hdl || !add || hdl == add)
2242 return 0;
2243 if (hdl->error)
2244 return hdl->error;
77e7c4e6 2245 mutex_lock(add->lock);
072e6602
HV		 2246 list_for_each_entry(ref, &add->ctrl_refs, node) {
2247 struct v4l2_ctrl *ctrl = ref->ctrl;
2248
0996517c
HV		 2249 /* Skip handler-private controls. */
2250 if (ctrl->is_private)
2251 continue;
6e239399
HV		 2252 /* And control classes */
2253 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2254 continue;
34a6b7d0
HV		 2255 /* Filter any unwanted controls */
2256 if (filter && !filter(ctrl))
2257 continue;
0996517c
HV		 2258 ret = handler_new_ref(hdl, ctrl);
2259 if (ret)
2260 break;
2261 }
77e7c4e6 2262 mutex_unlock(add->lock);
0996517c
HV		 2263 return ret;
2264}
2265EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2266
34a6b7d0
HV		 2267bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2268{
0f8017be 2269 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2270 return true;
0f8017be 2271 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2272 return true;
34a6b7d0
HV		 2273 switch (ctrl->id) {
2274 case V4L2_CID_AUDIO_MUTE:
2275 case V4L2_CID_AUDIO_VOLUME:
2276 case V4L2_CID_AUDIO_BALANCE:
2277 case V4L2_CID_AUDIO_BASS:
2278 case V4L2_CID_AUDIO_TREBLE:
2279 case V4L2_CID_AUDIO_LOUDNESS:
2280 return true;
2281 default:
2282 break;
2283 }
2284 return false;
2285}
2286EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2287
0996517c
HV		 2288/* Cluster controls */
2289void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2290{
5626b8c7 2291 bool has_volatiles = false;
0996517c
HV		 2292 int i;
2293
2294 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2295 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2296 return;
0996517c
HV		 2297
2298 for (i = 0; i < ncontrols; i++) {
2299 if (controls[i]) {
2300 controls[i]->cluster = controls;
2301 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2302 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2303 has_volatiles = true;
0996517c
HV		 2304 }
2305 }
5626b8c7 2306 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2307}
2308EXPORT_SYMBOL(v4l2_ctrl_cluster);
2309
72d877ca
HV		 2310void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2311 u8 manual_val, bool set_volatile)
2312{
2313 struct v4l2_ctrl *master = controls[0];
5626b8c7 2314 u32 flag = 0;
72d877ca
HV		 2315 int i;
2316
2317 v4l2_ctrl_cluster(ncontrols, controls);
2318 WARN_ON(ncontrols <= 1);
82a7c049 2319 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2320 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2321 master->is_auto = true;
5626b8c7 2322 master->has_volatiles = set_volatile;
72d877ca
HV		 2323 master->manual_mode_value = manual_val;
2324 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2325
2326 if (!is_cur_manual(master))
2327 flag = V4L2_CTRL_FLAG_INACTIVE |
2328 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2329
2330 for (i = 1; i < ncontrols; i++)
88365105 2331 if (controls[i])
72d877ca 2332 controls[i]->flags |= flag;
72d877ca
HV		 2333}
2334EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2335
0996517c
HV		 2336/* Activate/deactivate a control. */
2337void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2338{
6e239399
HV		 2339 /* invert since the actual flag is called 'inactive' */
2340 bool inactive = !active;
2341 bool old;
2342
0996517c
HV		 2343 if (ctrl == NULL)
2344 return;
2345
6e239399 2346 if (inactive)
0996517c 2347 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2348 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2349 else
2350 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2351 old = test_and_clear_bit(4, &ctrl->flags);
2352 if (old != inactive)
2353 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2354}
2355EXPORT_SYMBOL(v4l2_ctrl_activate);
2356
2357/* Grab/ungrab a control.
2358 Typically used when streaming starts and you want to grab controls,
2359 preventing the user from changing them.
2360
2361 Just call this and the framework will block any attempts to change
2362 these controls. */
2363void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2364{
6e239399
HV		 2365 bool old;
2366
0996517c
HV		 2367 if (ctrl == NULL)
2368 return;
2369
6e239399 2370 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2371 if (grabbed)
2372 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2373 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2374 else
2375 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2376 old = test_and_clear_bit(1, &ctrl->flags);
2377 if (old != grabbed)
2378 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2379 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2380}
2381EXPORT_SYMBOL(v4l2_ctrl_grab);
2382
2383/* Log the control name and value */
2384static void log_ctrl(const struct v4l2_ctrl *ctrl,
2385 const char *prefix, const char *colon)
2386{
0996517c
HV		 2387 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2388 return;
2389 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2390 return;
2391
7eafbce9 2392 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2393
0176077a
HV		 2394 ctrl->type_ops->log(ctrl);
2395
88365105
HV		 2396 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2397 V4L2_CTRL_FLAG_GRABBED |
2398 V4L2_CTRL_FLAG_VOLATILE)) {
2399 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2400 pr_cont(" inactive");
88365105 2401 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2402 pr_cont(" grabbed");
88365105 2403 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2404 pr_cont(" volatile");
88365105 2405 }
7eafbce9 2406 pr_cont("\n");
0996517c
HV		 2407}
2408
2409/* Log all controls owned by the handler */
2410void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2411 const char *prefix)
2412{
2413 struct v4l2_ctrl *ctrl;
2414 const char *colon = "";
2415 int len;
2416
2417 if (hdl == NULL)
2418 return;
2419 if (prefix == NULL)
2420 prefix = "";
2421 len = strlen(prefix);
2422 if (len && prefix[len - 1] != ' ')
2423 colon = ": ";
77e7c4e6 2424 mutex_lock(hdl->lock);
0996517c
HV		 2425 list_for_each_entry(ctrl, &hdl->ctrls, node)
2426 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2427 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2428 mutex_unlock(hdl->lock);
0996517c
HV		 2429}
2430EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2431
ffa9b9f0
SN		 2432int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2433{
2434 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2435 return 0;
2436}
2437EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2438
0996517c
HV		 2439/* Call s_ctrl for all controls owned by the handler */
2440int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2441{
2442 struct v4l2_ctrl *ctrl;
2443 int ret = 0;
2444
2445 if (hdl == NULL)
2446 return 0;
77e7c4e6 2447 mutex_lock(hdl->lock);
0996517c
HV		 2448 list_for_each_entry(ctrl, &hdl->ctrls, node)
2449 ctrl->done = false;
2450
2451 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2452 struct v4l2_ctrl *master = ctrl->cluster[0];
2453 int i;
2454
2455 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2456 /* Skip button controls and read-only controls. */
2457 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2458 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2459 continue;
2460
2a863793
HV		 2461 for (i = 0; i < master->ncontrols; i++) {
2462 if (master->cluster[i]) {
2463 cur_to_new(master->cluster[i]);
2464 master->cluster[i]->is_new = 1;
71c6c4c9 2465 master->cluster[i]->done = true;
2a863793
HV		 2466 }
2467 }
54c911eb 2468 ret = call_op(master, s_ctrl);
0996517c
HV		 2469 if (ret)
2470 break;
0996517c 2471 }
77e7c4e6 2472 mutex_unlock(hdl->lock);
0996517c
HV		 2473 return ret;
2474}
2475EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2476
d9a25471
HV		 2477/* Implement VIDIOC_QUERY_EXT_CTRL */
2478int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2479{
d9a25471 2480 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2481 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2482 struct v4l2_ctrl_ref *ref;
2483 struct v4l2_ctrl *ctrl;
2484
2485 if (hdl == NULL)
2486 return -EINVAL;
2487
77e7c4e6 2488 mutex_lock(hdl->lock);
0996517c
HV		 2489
2490 /* Try to find it */
2491 ref = find_ref(hdl, id);
2492
d9a25471
HV		 2493 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2494 bool is_compound;
2495 /* Match any control that is not hidden */
2496 unsigned mask = 1;
2497 bool match = false;
2498
2499 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2500 /* Match any hidden control */
2501 match = true;
2502 } else if ((qc->id & next_flags) == next_flags) {
2503 /* Match any control, compound or not */
2504 mask = 0;
2505 }
2506
0996517c
HV		 2507 /* Find the next control with ID > qc->id */
2508
2509 /* Did we reach the end of the control list? */
2510 if (id >= node2id(hdl->ctrl_refs.prev)) {
2511 ref = NULL; /* Yes, so there is no next control */
2512 } else if (ref) {
2513 /* We found a control with the given ID, so just get
d9a25471
HV		 2514 the next valid one in the list. */
2515 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2516 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2517 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2518 if (id < ref->ctrl->id &&
2519 (is_compound & mask) == match)
2520 break;
2521 }
2522 if (&ref->node == &hdl->ctrl_refs)
2523 ref = NULL;
0996517c
HV		 2524 } else {
2525 /* No control with the given ID exists, so start
2526 searching for the next largest ID. We know there
2527 is one, otherwise the first 'if' above would have
2528 been true. */
d9a25471 2529 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2530 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2531 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2532 if (id < ref->ctrl->id &&
2533 (is_compound & mask) == match)
0996517c 2534 break;
d9a25471
HV		 2535 }
2536 if (&ref->node == &hdl->ctrl_refs)
2537 ref = NULL;
0996517c
HV		 2538 }
2539 }
77e7c4e6 2540 mutex_unlock(hdl->lock);
d9a25471 2541
0996517c
HV		 2542 if (!ref)
2543 return -EINVAL;
2544
2545 ctrl = ref->ctrl;
2546 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2547 if (id >= V4L2_CID_PRIVATE_BASE)
2548 qc->id = id;
2549 else
2550 qc->id = ctrl->id;
0996517c 2551 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2552 qc->flags = ctrl->flags;
2553 qc->type = ctrl->type;
2554 if (ctrl->is_ptr)
2555 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2556 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2557 qc->elems = ctrl->elems;
2558 qc->nr_of_dims = ctrl->nr_of_dims;
2559 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2560 qc->minimum = ctrl->minimum;
2561 qc->maximum = ctrl->maximum;
2562 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2563 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2564 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2565 qc->step = 1;
2566 else
2567 qc->step = ctrl->step;
d9a25471
HV		 2568 return 0;
2569}
2570EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2571
2572/* Implement VIDIOC_QUERYCTRL */
2573int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2574{
2575 struct v4l2_query_ext_ctrl qec = { qc->id };
2576 int rc;
2577
2578 rc = v4l2_query_ext_ctrl(hdl, &qec);
2579 if (rc)
2580 return rc;
2581
2582 qc->id = qec.id;
2583 qc->type = qec.type;
2584 qc->flags = qec.flags;
2585 strlcpy(qc->name, qec.name, sizeof(qc->name));
2586 switch (qc->type) {
2587 case V4L2_CTRL_TYPE_INTEGER:
2588 case V4L2_CTRL_TYPE_BOOLEAN:
2589 case V4L2_CTRL_TYPE_MENU:
2590 case V4L2_CTRL_TYPE_INTEGER_MENU:
2591 case V4L2_CTRL_TYPE_STRING:
2592 case V4L2_CTRL_TYPE_BITMASK:
2593 qc->minimum = qec.minimum;
2594 qc->maximum = qec.maximum;
2595 qc->step = qec.step;
2596 qc->default_value = qec.default_value;
2597 break;
2598 default:
2599 qc->minimum = 0;
2600 qc->maximum = 0;
2601 qc->step = 0;
2602 qc->default_value = 0;
2603 break;
2604 }
0996517c
HV		 2605 return 0;
2606}
2607EXPORT_SYMBOL(v4l2_queryctrl);
2608
2609int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2610{
d9a25471 2611 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2612 return -EINVAL;
0996517c
HV		 2613 return v4l2_queryctrl(sd->ctrl_handler, qc);
2614}
2615EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2616
2617/* Implement VIDIOC_QUERYMENU */
2618int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2619{
2620 struct v4l2_ctrl *ctrl;
2621 u32 i = qm->index;
2622
2623 ctrl = v4l2_ctrl_find(hdl, qm->id);
2624 if (!ctrl)
2625 return -EINVAL;
2626
2627 qm->reserved = 0;
2628 /* Sanity checks */
ce580fe5
SA		 2629 switch (ctrl->type) {
2630 case V4L2_CTRL_TYPE_MENU:
2631 if (ctrl->qmenu == NULL)
2632 return -EINVAL;
2633 break;
2634 case V4L2_CTRL_TYPE_INTEGER_MENU:
2635 if (ctrl->qmenu_int == NULL)
2636 return -EINVAL;
2637 break;
2638 default:
2639 return -EINVAL;
2640 }
2641
2642 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2643 return -EINVAL;
ce580fe5 2644
0996517c
HV		 2645 /* Use mask to see if this menu item should be skipped */
2646 if (ctrl->menu_skip_mask & (1 << i))
2647 return -EINVAL;
2648 /* Empty menu items should also be skipped */
ce580fe5
SA		 2649 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2650 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2651 return -EINVAL;
2652 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2653 } else {
2654 qm->value = ctrl->qmenu_int[i];
2655 }
0996517c
HV		 2656 return 0;
2657}
2658EXPORT_SYMBOL(v4l2_querymenu);
2659
2660int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2661{
2662 return v4l2_querymenu(sd->ctrl_handler, qm);
2663}
2664EXPORT_SYMBOL(v4l2_subdev_querymenu);
2665
2666
2667
2668/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2669
2670 It is not a fully atomic operation, just best-effort only. After all, if
2671 multiple controls have to be set through multiple i2c writes (for example)
2672 then some initial writes may succeed while others fail. Thus leaving the
2673 system in an inconsistent state. The question is how much effort you are
2674 willing to spend on trying to make something atomic that really isn't.
2675
2676 From the point of view of an application the main requirement is that
2677 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2678 error should be returned without actually affecting any controls.
2679
2680 If all the values are correct, then it is acceptable to just give up
2681 in case of low-level errors.
2682
2683 It is important though that the application can tell when only a partial
2684 configuration was done. The way we do that is through the error_idx field
2685 of struct v4l2_ext_controls: if that is equal to the count field then no
2686 controls were affected. Otherwise all controls before that index were
2687 successful in performing their 'get' or 'set' operation, the control at
2688 the given index failed, and you don't know what happened with the controls
2689 after the failed one. Since if they were part of a control cluster they
2690 could have been successfully processed (if a cluster member was encountered
2691 at index < error_idx), they could have failed (if a cluster member was at
2692 error_idx), or they may not have been processed yet (if the first cluster
2693 member appeared after error_idx).
2694
2695 It is all fairly theoretical, though. In practice all you can do is to
2696 bail out. If error_idx == count, then it is an application bug. If
2697 error_idx < count then it is only an application bug if the error code was
2698 EBUSY. That usually means that something started streaming just when you
2699 tried to set the controls. In all other cases it is a driver/hardware
2700 problem and all you can do is to retry or bail out.
2701
2702 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2703 never modifies controls the error_idx is just set to whatever control
2704 has an invalid value.
2705 */
2706
2707/* Prepare for the extended g/s/try functions.
2708 Find the controls in the control array and do some basic checks. */
2709static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2710 struct v4l2_ext_controls *cs,
d9a25471
HV		 2711 struct v4l2_ctrl_helper *helpers,
2712 bool get)
0996517c 2713{
eb5b16ef
HV		 2714 struct v4l2_ctrl_helper *h;
2715 bool have_clusters = false;
0996517c
HV		 2716 u32 i;
2717
eb5b16ef 2718 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2719 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2720 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2721 struct v4l2_ctrl *ctrl;
2722 u32 id = c->id & V4L2_CTRL_ID_MASK;
2723
37cd3b73 2724 cs->error_idx = i;
0996517c 2725
953eae5d
RR		 2726 if (cs->which &&
2727 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
2728 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 2729 return -EINVAL;
2730
2731 /* Old-style private controls are not allowed for
2732 extended controls */
2733 if (id >= V4L2_CID_PRIVATE_BASE)
2734 return -EINVAL;
eb5b16ef
HV		 2735 ref = find_ref_lock(hdl, id);
2736 if (ref == NULL)
0996517c 2737 return -EINVAL;
eb5b16ef 2738 ctrl = ref->ctrl;
0996517c
HV		 2739 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2740 return -EINVAL;
2741
eb5b16ef
HV		 2742 if (ctrl->cluster[0]->ncontrols > 1)
2743 have_clusters = true;
2744 if (ctrl->cluster[0] != ctrl)
2745 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2746 if (ctrl->is_ptr && !ctrl->is_string) {
2747 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2748
2749 if (c->size < tot_size) {
2750 if (get) {
2751 c->size = tot_size;
2752 return -ENOSPC;
2753 }
2754 return -EFAULT;
d9a25471 2755 }
302ab7ce 2756 c->size = tot_size;
d9a25471 2757 }
eb5b16ef
HV		 2758 /* Store the ref to the master control of the cluster */
2759 h->mref = ref;
2760 h->ctrl = ctrl;
2761 /* Initially set next to 0, meaning that there is no other
2762 control in this helper array belonging to the same
2763 cluster */
2764 h->next = 0;
0996517c 2765 }
0996517c 2766
eb5b16ef
HV		 2767 /* We are done if there were no controls that belong to a multi-
2768 control cluster. */
2769 if (!have_clusters)
2770 return 0;
0996517c 2771
eb5b16ef
HV		 2772 /* The code below figures out in O(n) time which controls in the list
2773 belong to the same cluster. */
0996517c 2774
eb5b16ef 2775 /* This has to be done with the handler lock taken. */
77e7c4e6 2776 mutex_lock(hdl->lock);
0996517c 2777
eb5b16ef
HV		 2778 /* First zero the helper field in the master control references */
2779 for (i = 0; i < cs->count; i++)
c082266f 2780 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2781 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2782 struct v4l2_ctrl_ref *mref = h->mref;
2783
2784 /* If the mref->helper is set, then it points to an earlier
2785 helper that belongs to the same cluster. */
2786 if (mref->helper) {
2787 /* Set the next field of mref->helper to the current
2788 index: this means that that earlier helper now
2789 points to the next helper in the same cluster. */
2790 mref->helper->next = i;
2791 /* mref should be set only for the first helper in the
2792 cluster, clear the others. */
2793 h->mref = NULL;
2794 }
2795 /* Point the mref helper to the current helper struct. */
2796 mref->helper = h;
0996517c 2797 }
77e7c4e6 2798 mutex_unlock(hdl->lock);
eb5b16ef 2799 return 0;
0996517c
HV		 2800}
2801
2802/* Handles the corner case where cs->count == 0. It checks whether the
2803 specified control class exists. If that class ID is 0, then it checks
2804 whether there are any controls at all. */
0f8017be 2805static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 2806{
953eae5d 2807 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL)
0996517c 2808 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
0f8017be 2809 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 2810}
2811
2812
2813
2814/* Get extended controls. Allocates the helpers array if needed. */
2815int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2816{
eb5b16ef
HV		 2817 struct v4l2_ctrl_helper helper[4];
2818 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2819 int ret;
ddac5c10 2820 int i, j;
953eae5d
RR		 2821 bool def_value;
2822
2823 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 2824
2825 cs->error_idx = cs->count;
0f8017be 2826 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 2827
2828 if (hdl == NULL)
2829 return -EINVAL;
2830
2831 if (cs->count == 0)
0f8017be 2832 return class_check(hdl, cs->which);
0996517c
HV		 2833
2834 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2835 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2836 GFP_KERNEL);
0996517c
HV		 2837 if (helpers == NULL)
2838 return -ENOMEM;
2839 }
2840
d9a25471 2841 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2842 cs->error_idx = cs->count;
0996517c
HV		 2843
2844 for (i = 0; !ret && i < cs->count; i++)
2845 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2846 ret = -EACCES;
2847
2848 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 2849 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 2850 struct v4l2_ctrl *ctrl);
eb5b16ef 2851 struct v4l2_ctrl *master;
0996517c 2852
953eae5d
RR		 2853 ctrl_to_user = def_value ? def_to_user : cur_to_user;
2854
eb5b16ef 2855 if (helpers[i].mref == NULL)
0996517c
HV		 2856 continue;
2857
eb5b16ef 2858 master = helpers[i].mref->ctrl;
0996517c
HV		 2859 cs->error_idx = i;
2860
2861 v4l2_ctrl_lock(master);
ddac5c10
HV		 2862
2863 /* g_volatile_ctrl will update the new control values */
953eae5d
RR		 2864 if (!def_value &&
2865 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2866 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 2867 for (j = 0; j < master->ncontrols; j++)
2868 cur_to_new(master->cluster[j]);
54c911eb 2869 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2870 ctrl_to_user = new_to_user;
ddac5c10
HV		 2871 }
2872 /* If OK, then copy the current (for non-volatile controls)
2873 or the new (for volatile controls) control values to the
2874 caller */
eb5b16ef
HV		 2875 if (!ret) {
2876 u32 idx = i;
2877
2878 do {
2879 ret = ctrl_to_user(cs->controls + idx,
2880 helpers[idx].ctrl);
2881 idx = helpers[idx].next;
2882 } while (!ret && idx);
2883 }
0996517c 2884 v4l2_ctrl_unlock(master);
0996517c
HV		 2885 }
2886
2887 if (cs->count > ARRAY_SIZE(helper))
2888 kfree(helpers);
2889 return ret;
2890}
2891EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2892
2893int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2894{
2895 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2896}
2897EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2898
2899/* Helper function to get a single control */
03d5285b 2900static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2901{
2902 struct v4l2_ctrl *master = ctrl->cluster[0];
2903 int ret = 0;
ddac5c10 2904 int i;
0996517c 2905
d9a25471 2906 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2907 * cur_to_user() calls below would need to be modified not to access
2908 * userspace memory when called from get_ctrl().
2909 */
a8077734 2910 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 2911 return -EINVAL;
2912
0996517c
HV		 2913 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2914 return -EACCES;
2915
2916 v4l2_ctrl_lock(master);
2917 /* g_volatile_ctrl will update the current control values */
5626b8c7 2918 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2919 for (i = 0; i < master->ncontrols; i++)
2920 cur_to_new(master->cluster[i]);
54c911eb 2921 ret = call_op(master, g_volatile_ctrl);
03d5285b 2922 new_to_user(c, ctrl);
ddac5c10 2923 } else {
03d5285b 2924 cur_to_user(c, ctrl);
ddac5c10 2925 }
0996517c
HV		 2926 v4l2_ctrl_unlock(master);
2927 return ret;
2928}
2929
2930int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2931{
2932 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2933 struct v4l2_ext_control c;
2934 int ret;
0996517c 2935
d9a25471 2936 if (ctrl == NULL || !ctrl->is_int)
0996517c 2937 return -EINVAL;
03d5285b
LP		 2938 ret = get_ctrl(ctrl, &c);
2939 control->value = c.value;
2940 return ret;
0996517c
HV		 2941}
2942EXPORT_SYMBOL(v4l2_g_ctrl);
2943
2944int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2945{
2946 return v4l2_g_ctrl(sd->ctrl_handler, control);
2947}
2948EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2949
2950s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2951{
03d5285b 2952 struct v4l2_ext_control c;
0996517c
HV		 2953
2954 /* It's a driver bug if this happens. */
d9a25471 2955 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2956 c.value = 0;
2957 get_ctrl(ctrl, &c);
2958 return c.value;
0996517c
HV		 2959}
2960EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2961
03d5285b
LP		 2962s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2963{
2964 struct v4l2_ext_control c;
2965
2966 /* It's a driver bug if this happens. */
998e7659 2967 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 2968 c.value64 = 0;
03d5285b 2969 get_ctrl(ctrl, &c);
a8077734 2970 return c.value64;
03d5285b
LP		 2971}
2972EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2973
0996517c
HV		 2974
2975/* Core function that calls try/s_ctrl and ensures that the new value is
2976 copied to the current value on a set.
2977 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2978static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2979 bool set, u32 ch_flags)
0996517c 2980{
72d877ca 2981 bool update_flag;
eb5b16ef 2982 int ret;
0996517c
HV		 2983 int i;
2984
2985 /* Go through the cluster and either validate the new value or
2986 (if no new value was set), copy the current value to the new
2987 value, ensuring a consistent view for the control ops when
2988 called. */
eb5b16ef 2989 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2990 struct v4l2_ctrl *ctrl = master->cluster[i];
2991
2992 if (ctrl == NULL)
2993 continue;
2994
eb5b16ef
HV		 2995 if (!ctrl->is_new) {
2996 cur_to_new(ctrl);
0996517c
HV		 2997 continue;
2998 }
eb5b16ef
HV		 2999 /* Check again: it may have changed since the
3000 previous check in try_or_set_ext_ctrls(). */
3001 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3002 return -EBUSY;
0996517c
HV		 3003 }
3004
eb5b16ef 3005 ret = call_op(master, try_ctrl);
0996517c
HV		 3006
3007 /* Don't set if there is no change */
72d877ca
HV		 3008 if (ret || !set || !cluster_changed(master))
3009 return ret;
3010 ret = call_op(master, s_ctrl);
72d877ca
HV		 3011 if (ret)
3012 return ret;
3013
eb5b16ef 3014 /* If OK, then make the new values permanent. */
72d877ca
HV		 3015 update_flag = is_cur_manual(master) != is_new_manual(master);
3016 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 3017 new_to_cur(fh, master->cluster[i], ch_flags |
3018 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 3019 return 0;
0996517c
HV		 3020}
3021
e6402585
HV		 3022/* Validate controls. */
3023static int validate_ctrls(struct v4l2_ext_controls *cs,
3024 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3025{
e6402585 3026 unsigned i;
0996517c
HV		 3027 int ret = 0;
3028
eb5b16ef 3029 cs->error_idx = cs->count;
0996517c
HV		 3030 for (i = 0; i < cs->count; i++) {
3031 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3032 union v4l2_ctrl_ptr p_new;
0996517c 3033
e6402585 3034 cs->error_idx = i;
0996517c
HV		 3035
3036 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3037 return -EACCES;
3038 /* This test is also done in try_set_control_cluster() which
3039 is called in atomic context, so that has the final say,
3040 but it makes sense to do an up-front check as well. Once
3041 an error occurs in try_set_control_cluster() some other
3042 controls may have been set already and we want to do a
3043 best-effort to avoid that. */
3044 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3045 return -EBUSY;
7a7f1ab3
HV		 3046 /*
3047 * Skip validation for now if the payload needs to be copied
3048 * from userspace into kernelspace. We'll validate those later.
3049 */
3050 if (ctrl->is_ptr)
3051 continue;
3052 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3053 p_new.p_s64 = &cs->controls[i].value64;
3054 else
3055 p_new.p_s32 = &cs->controls[i].value;
3056 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3057 if (ret)
3058 return ret;
0996517c 3059 }
e6402585
HV		 3060 return 0;
3061}
3062
5626b8c7
HV		 3063/* Obtain the current volatile values of an autocluster and mark them
3064 as new. */
3065static void update_from_auto_cluster(struct v4l2_ctrl *master)
3066{
3067 int i;
3068
759b26a1 3069 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3070 cur_to_new(master->cluster[i]);
3071 if (!call_op(master, g_volatile_ctrl))
3072 for (i = 1; i < master->ncontrols; i++)
3073 if (master->cluster[i])
3074 master->cluster[i]->is_new = 1;
3075}
3076
e6402585
HV		 3077/* Try or try-and-set controls */
3078static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3079 struct v4l2_ext_controls *cs,
3080 bool set)
3081{
3082 struct v4l2_ctrl_helper helper[4];
3083 struct v4l2_ctrl_helper *helpers = helper;
3084 unsigned i, j;
3085 int ret;
3086
3087 cs->error_idx = cs->count;
953eae5d
RR		 3088
3089 /* Default value cannot be changed */
3090 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3091 return -EINVAL;
3092
0f8017be 3093 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3094
3095 if (hdl == NULL)
3096 return -EINVAL;
3097
3098 if (cs->count == 0)
0f8017be 3099 return class_check(hdl, cs->which);
0996517c 3100
e6402585 3101 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 3102 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
3103 GFP_KERNEL);
e6402585
HV		 3104 if (!helpers)
3105 return -ENOMEM;
3106 }
d9a25471 3107 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3108 if (!ret)
3109 ret = validate_ctrls(cs, helpers, set);
3110 if (ret && set)
3111 cs->error_idx = cs->count;
0996517c 3112 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3113 struct v4l2_ctrl *master;
3114 u32 idx = i;
0996517c 3115
eb5b16ef 3116 if (helpers[i].mref == NULL)
0996517c
HV		 3117 continue;
3118
37cd3b73 3119 cs->error_idx = i;
eb5b16ef
HV		 3120 master = helpers[i].mref->ctrl;
3121 v4l2_ctrl_lock(master);
0996517c 3122
2a863793 3123 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3124 for (j = 0; j < master->ncontrols; j++)
3125 if (master->cluster[j])
2a863793 3126 master->cluster[j]->is_new = 0;
0996517c 3127
5626b8c7
HV		 3128 /* For volatile autoclusters that are currently in auto mode
3129 we need to discover if it will be set to manual mode.
3130 If so, then we have to copy the current volatile values
3131 first since those will become the new manual values (which
3132 may be overwritten by explicit new values from this set
3133 of controls). */
3134 if (master->is_auto && master->has_volatiles &&
3135 !is_cur_manual(master)) {
3136 /* Pick an initial non-manual value */
3137 s32 new_auto_val = master->manual_mode_value + 1;
3138 u32 tmp_idx = idx;
3139
3140 do {
3141 /* Check if the auto control is part of the
3142 list, and remember the new value. */
3143 if (helpers[tmp_idx].ctrl == master)
3144 new_auto_val = cs->controls[tmp_idx].value;
3145 tmp_idx = helpers[tmp_idx].next;
3146 } while (tmp_idx);
3147 /* If the new value == the manual value, then copy
3148 the current volatile values. */
3149 if (new_auto_val == master->manual_mode_value)
3150 update_from_auto_cluster(master);
3151 }
3152
0996517c 3153 /* Copy the new caller-supplied control values.
2a863793 3154 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3155 do {
7a7f1ab3
HV		 3156 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3157
3158 ret = user_to_new(cs->controls + idx, ctrl);
3159 if (!ret && ctrl->is_ptr)
3160 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3161 idx = helpers[idx].next;
3162 } while (!ret && idx);
0996517c
HV		 3163
3164 if (!ret)
2ccbe779 3165 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3166
3167 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3168 if (!ret) {
3169 idx = i;
3170 do {
adf41b9b 3171 ret = new_to_user(cs->controls + idx,
e6402585 3172 helpers[idx].ctrl);
eb5b16ef
HV		 3173 idx = helpers[idx].next;
3174 } while (!ret && idx);
3175 }
3176 v4l2_ctrl_unlock(master);
0996517c 3177 }
0996517c 3178
0996517c
HV		 3179 if (cs->count > ARRAY_SIZE(helper))
3180 kfree(helpers);
3181 return ret;
3182}
3183
3184int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3185{
ab892bac 3186 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3187}
3188EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3189
ab892bac
HV		 3190int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3191 struct v4l2_ext_controls *cs)
0996517c 3192{
ab892bac 3193 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3194}
3195EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3196
3197int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3198{
ab892bac 3199 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 3200}
3201EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
3202
3203int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3204{
ab892bac 3205 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 3206}
3207EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
3208
3209/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3210static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3211{
3212 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3213 int ret;
0996517c
HV		 3214 int i;
3215
2a863793 3216 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3217 for (i = 0; i < master->ncontrols; i++)
3218 if (master->cluster[i])
2a863793 3219 master->cluster[i]->is_new = 0;
0996517c 3220
7a7f1ab3
HV		 3221 ret = validate_new(ctrl, ctrl->p_new);
3222 if (ret)
3223 return ret;
5d0360a4 3224
5626b8c7
HV		 3225 /* For autoclusters with volatiles that are switched from auto to
3226 manual mode we have to update the current volatile values since
3227 those will become the initial manual values after such a switch. */
3228 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3229 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3230 update_from_auto_cluster(master);
03d5285b 3231
5d0360a4 3232 ctrl->is_new = 1;
2ccbe779
SN		 3233 return try_or_set_cluster(fh, master, true, ch_flags);
3234}
03d5285b 3235
2ccbe779
SN		 3236/* Helper function for VIDIOC_S_CTRL compatibility */
3237static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3238 struct v4l2_ext_control *c)
3239{
7a7f1ab3 3240 int ret;
2ccbe779 3241
7a7f1ab3
HV		 3242 v4l2_ctrl_lock(ctrl);
3243 user_to_new(c, ctrl);
3244 ret = set_ctrl(fh, ctrl, 0);
3245 if (!ret)
3246 cur_to_user(c, ctrl);
3247 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3248 return ret;
3249}
3250
ab892bac
HV		 3251int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3252 struct v4l2_control *control)
0996517c
HV		 3253{
3254 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3255 struct v4l2_ext_control c = { control->id };
03d5285b 3256 int ret;
0996517c 3257
d9a25471 3258 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3259 return -EINVAL;
3260
7ebbc39f
HV		 3261 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3262 return -EACCES;
3263
03d5285b 3264 c.value = control->value;
2ccbe779 3265 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3266 control->value = c.value;
3267 return ret;
0996517c
HV		 3268}
3269EXPORT_SYMBOL(v4l2_s_ctrl);
3270
3271int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3272{
ab892bac 3273 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3274}
3275EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3276
0c4348ad 3277int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3278{
0c4348ad 3279 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3280
0996517c 3281 /* It's a driver bug if this happens. */
d9a25471 3282 WARN_ON(!ctrl->is_int);
5d0360a4 3283 ctrl->val = val;
7a7f1ab3 3284 return set_ctrl(NULL, ctrl, 0);
0996517c 3285}
0c4348ad 3286EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3287
0c4348ad 3288int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3289{
0c4348ad 3290 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3291
3292 /* It's a driver bug if this happens. */
998e7659 3293 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3294 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3295 return set_ctrl(NULL, ctrl, 0);
03d5285b 3296}
0c4348ad 3297EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3298
5d0360a4
HV		 3299int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3300{
3301 lockdep_assert_held(ctrl->handler->lock);
3302
3303 /* It's a driver bug if this happens. */
3304 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3305 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3306 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3307}
3308EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3309
8ac7a949
HV		 3310void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3311{
3312 if (ctrl == NULL)
3313 return;
3314 if (notify == NULL) {
3315 ctrl->call_notify = 0;
3316 return;
3317 }
3318 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3319 return;
3320 ctrl->handler->notify = notify;
3321 ctrl->handler->notify_priv = priv;
3322 ctrl->call_notify = 1;
3323}
3324EXPORT_SYMBOL(v4l2_ctrl_notify);
3325
5a573925 3326int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3327 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3328{
95ad7ff3
RR		 3329 bool value_changed;
3330 bool range_changed = false;
302ab7ce 3331 int ret;
2ccbe779 3332
5a573925
SA		 3333 lockdep_assert_held(ctrl->handler->lock);
3334
2ccbe779
SN		 3335 switch (ctrl->type) {
3336 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3337 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3338 case V4L2_CTRL_TYPE_BOOLEAN:
3339 case V4L2_CTRL_TYPE_MENU:
3340 case V4L2_CTRL_TYPE_INTEGER_MENU:
3341 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3342 case V4L2_CTRL_TYPE_U8:
3343 case V4L2_CTRL_TYPE_U16:
811c5081 3344 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3345 if (ctrl->is_array)
3346 return -EINVAL;
3347 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3348 if (ret)
3349 return ret;
3350 break;
3351 default:
3352 return -EINVAL;
3353 }
95ad7ff3
RR		 3354 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
3355 (ctrl->step != step) || ctrl->default_value != def) {
3356 range_changed = true;
3357 ctrl->minimum = min;
3358 ctrl->maximum = max;
3359 ctrl->step = step;
3360 ctrl->default_value = def;
3361 }
7a7f1ab3
HV		 3362 cur_to_new(ctrl);
3363 if (validate_new(ctrl, ctrl->p_new)) {
3364 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3365 *ctrl->p_new.p_s64 = def;
3366 else
3367 *ctrl->p_new.p_s32 = def;
3368 }
3369
3370 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 3371 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 3372 else
95ad7ff3
RR		 3373 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3374 if (value_changed)
7a7f1ab3 3375 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 3376 else if (range_changed)
2ccbe779 3377 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3378 return ret;
3379}
5a573925 3380EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3381
6e6d76cd 3382static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3383{
3e366149
HG		 3384 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3385
3386 if (ctrl == NULL)
3387 return -EINVAL;
3388
6e239399 3389 v4l2_ctrl_lock(ctrl);
77068d36 3390 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3391 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3392 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3393 struct v4l2_event ev;
c12fcfd6 3394 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3395
c12fcfd6
HV		 3396 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3397 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3398 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3399 /* Mark the queue as active, allowing this initial
3400 event to be accepted. */
3401 sev->elems = elems;
77068d36 3402 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3403 }
3404 v4l2_ctrl_unlock(ctrl);
3e366149 3405 return 0;
6e239399 3406}
6e239399 3407
3e366149 3408static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3409{
3e366149
HG		 3410 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3411
6e239399 3412 v4l2_ctrl_lock(ctrl);
77068d36 3413 list_del(&sev->node);
6e239399
HV		 3414 v4l2_ctrl_unlock(ctrl);
3415}
3e366149
HG		 3416
3417void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3418{
3419 u32 old_changes = old->u.ctrl.changes;
3420
3421 old->u.ctrl = new->u.ctrl;
3422 old->u.ctrl.changes |= old_changes;
3423}
3424EXPORT_SYMBOL(v4l2_ctrl_replace);
3425
3426void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3427{
3428 new->u.ctrl.changes |= old->u.ctrl.changes;
3429}
3430EXPORT_SYMBOL(v4l2_ctrl_merge);
3431
3432const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3433 .add = v4l2_ctrl_add_event,
3434 .del = v4l2_ctrl_del_event,
3435 .replace = v4l2_ctrl_replace,
3436 .merge = v4l2_ctrl_merge,
3437};
3438EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3439
3440int v4l2_ctrl_log_status(struct file *file, void *fh)
3441{
3442 struct video_device *vfd = video_devdata(file);
3443 struct v4l2_fh *vfh = file->private_data;
3444
3445 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3446 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3447 vfd->v4l2_dev->name);
3448 return 0;
3449}
3450EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3451
3452int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3453 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3454{
3455 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3456 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3457 return -EINVAL;
3458}
3459EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3460
22fa4279
SN		 3461int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3462 struct v4l2_event_subscription *sub)
3463{
3464 if (!sd->ctrl_handler)
3465 return -EINVAL;
3466 return v4l2_ctrl_subscribe_event(fh, sub);
3467}
3468EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3469
a26243b0
HV		 3470unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3471{
3472 struct v4l2_fh *fh = file->private_data;
3473
3474 if (v4l2_event_pending(fh))
3475 return POLLPRI;
3476 poll_wait(file, &fh->wait, wait);
3477 return 0;
3478}
3479EXPORT_SYMBOL(v4l2_ctrl_poll);
Linux 6.x block layer and io_uring tree(s)