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[media] vivid: add support to set CVT, GTF timings
[mirror_ubuntu-artful-kernel.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
2b80163c 22#include <linux/slab.h>
35a24636 23#include <linux/export.h>
0996517c
HV		 24#include <media/v4l2-ioctl.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ctrls.h>
6e239399 27#include <media/v4l2-event.h>
0996517c
HV		 28#include <media/v4l2-dev.h>
29
ddac5c10
HV		 30#define has_op(master, op) \
31 (master->ops && master->ops->op)
54c911eb 32#define call_op(master, op) \
ddac5c10 33 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 34
0996517c 35/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 36struct v4l2_ctrl_helper {
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref *mref;
0996517c
HV		 39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
43 u32 next;
0996517c
HV		 44};
45
72d877ca 46/* Small helper function to determine if the autocluster is set to manual
88365105 47 mode. */
72d877ca
HV		 48static bool is_cur_manual(const struct v4l2_ctrl *master)
49{
50 return master->is_auto && master->cur.val == master->manual_mode_value;
51}
52
53/* Same as above, but this checks the against the new value instead of the
54 current value. */
55static bool is_new_manual(const struct v4l2_ctrl *master)
56{
57 return master->is_auto && master->val == master->manual_mode_value;
58}
59
0996517c
HV		 60/* Returns NULL or a character pointer array containing the menu for
61 the given control ID. The pointer array ends with a NULL pointer.
62 An empty string signifies a menu entry that is invalid. This allows
63 drivers to disable certain options if it is not supported. */
513521ea 64const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 65{
513521ea 66 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 67 "44.1 kHz",
68 "48 kHz",
69 "32 kHz",
70 NULL
71 };
513521ea 72 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 73 "MPEG-1/2 Layer I",
74 "MPEG-1/2 Layer II",
75 "MPEG-1/2 Layer III",
76 "MPEG-2/4 AAC",
77 "AC-3",
78 NULL
79 };
513521ea 80 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 81 "32 kbps",
82 "64 kbps",
83 "96 kbps",
84 "128 kbps",
85 "160 kbps",
86 "192 kbps",
87 "224 kbps",
88 "256 kbps",
89 "288 kbps",
90 "320 kbps",
91 "352 kbps",
92 "384 kbps",
93 "416 kbps",
94 "448 kbps",
95 NULL
96 };
513521ea 97 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 98 "32 kbps",
99 "48 kbps",
100 "56 kbps",
101 "64 kbps",
102 "80 kbps",
103 "96 kbps",
104 "112 kbps",
105 "128 kbps",
106 "160 kbps",
107 "192 kbps",
108 "224 kbps",
109 "256 kbps",
110 "320 kbps",
111 "384 kbps",
112 NULL
113 };
513521ea 114 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 115 "32 kbps",
116 "40 kbps",
117 "48 kbps",
118 "56 kbps",
119 "64 kbps",
120 "80 kbps",
121 "96 kbps",
122 "112 kbps",
123 "128 kbps",
124 "160 kbps",
125 "192 kbps",
126 "224 kbps",
127 "256 kbps",
128 "320 kbps",
129 NULL
130 };
513521ea 131 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 132 "32 kbps",
133 "40 kbps",
134 "48 kbps",
135 "56 kbps",
136 "64 kbps",
137 "80 kbps",
138 "96 kbps",
139 "112 kbps",
140 "128 kbps",
141 "160 kbps",
142 "192 kbps",
143 "224 kbps",
144 "256 kbps",
145 "320 kbps",
146 "384 kbps",
147 "448 kbps",
148 "512 kbps",
149 "576 kbps",
150 "640 kbps",
151 NULL
152 };
513521ea 153 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 154 "Stereo",
155 "Joint Stereo",
156 "Dual",
157 "Mono",
158 NULL
159 };
513521ea 160 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 161 "Bound 4",
162 "Bound 8",
163 "Bound 12",
164 "Bound 16",
165 NULL
166 };
513521ea 167 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 168 "No Emphasis",
169 "50/15 us",
170 "CCITT J17",
171 NULL
172 };
513521ea 173 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 174 "No CRC",
175 "16-bit CRC",
176 NULL
177 };
24c19a21
HV		 178 static const char * const mpeg_audio_dec_playback[] = {
179 "Auto",
180 "Stereo",
181 "Left",
182 "Right",
183 "Mono",
184 "Swapped Stereo",
185 NULL
186 };
513521ea 187 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 188 "MPEG-1",
189 "MPEG-2",
190 "MPEG-4 AVC",
191 NULL
192 };
513521ea 193 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 194 "1x1",
195 "4x3",
196 "16x9",
197 "2.21x1",
198 NULL
199 };
513521ea 200 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 201 "Variable Bitrate",
202 "Constant Bitrate",
203 NULL
204 };
513521ea 205 static const char * const mpeg_stream_type[] = {
0996517c
HV		 206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
212 NULL
213 };
513521ea 214 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 215 "No VBI",
064f5096 216 "Private Packet, IVTV Format",
0996517c
HV		 217 NULL
218 };
513521ea 219 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 220 "Disabled",
221 "50 Hz",
222 "60 Hz",
d26a6635 223 "Auto",
0996517c
HV		 224 NULL
225 };
513521ea 226 static const char * const camera_exposure_auto[] = {
0996517c
HV		 227 "Auto Mode",
228 "Manual Mode",
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
231 NULL
232 };
cf072139
SN		 233 static const char * const camera_exposure_metering[] = {
234 "Average",
235 "Center Weighted",
236 "Spot",
fc39f46b 237 "Matrix",
cf072139
SN		 238 NULL
239 };
2272ab65
SN		 240 static const char * const camera_auto_focus_range[] = {
241 "Auto",
242 "Normal",
243 "Macro",
244 "Infinity",
245 NULL
246 };
513521ea 247 static const char * const colorfx[] = {
0996517c
HV		 248 "None",
249 "Black & White",
250 "Sepia",
251 "Negative",
252 "Emboss",
253 "Sketch",
064f5096
KD		 254 "Sky Blue",
255 "Grass Green",
256 "Skin Whiten",
0996517c 257 "Vivid",
6491d1ad
SN		 258 "Aqua",
259 "Art Freeze",
260 "Silhouette",
261 "Solarization",
262 "Antique",
263 "Set Cb/Cr",
0996517c
HV		 264 NULL
265 };
e40a0573
SN		 266 static const char * const auto_n_preset_white_balance[] = {
267 "Manual",
268 "Auto",
269 "Incandescent",
270 "Fluorescent",
271 "Fluorescent H",
272 "Horizon",
273 "Daylight",
274 "Flash",
275 "Cloudy",
276 "Shade",
277 NULL,
278 };
7f84ad8b
SN		 279 static const char * const camera_iso_sensitivity_auto[] = {
280 "Manual",
281 "Auto",
282 NULL
283 };
0bf6b7dc
SN		 284 static const char * const scene_mode[] = {
285 "None",
286 "Backlight",
287 "Beach/Snow",
288 "Candle Light",
289 "Dusk/Dawn",
290 "Fall Colors",
291 "Fireworks",
292 "Landscape",
293 "Night",
294 "Party/Indoor",
295 "Portrait",
296 "Sports",
297 "Sunset",
298 "Text",
299 NULL
300 };
aec330a8
AS		 301 static const char * const tune_emphasis[] = {
302 "None",
f769c260
HV		 303 "50 Microseconds",
304 "75 Microseconds",
0996517c
HV		 305 NULL,
306 };
064f5096
KD		 307 static const char * const header_mode[] = {
308 "Separate Buffer",
309 "Joined With 1st Frame",
310 NULL,
311 };
312 static const char * const multi_slice[] = {
313 "Single",
314 "Max Macroblocks",
315 "Max Bytes",
316 NULL,
317 };
318 static const char * const entropy_mode[] = {
319 "CAVLC",
320 "CABAC",
321 NULL,
322 };
323 static const char * const mpeg_h264_level[] = {
324 "1",
325 "1b",
326 "1.1",
327 "1.2",
328 "1.3",
329 "2",
330 "2.1",
331 "2.2",
332 "3",
333 "3.1",
334 "3.2",
335 "4",
336 "4.1",
337 "4.2",
338 "5",
339 "5.1",
340 NULL,
341 };
342 static const char * const h264_loop_filter[] = {
343 "Enabled",
344 "Disabled",
345 "Disabled at Slice Boundary",
346 NULL,
347 };
348 static const char * const h264_profile[] = {
349 "Baseline",
350 "Constrained Baseline",
351 "Main",
352 "Extended",
353 "High",
354 "High 10",
355 "High 422",
356 "High 444 Predictive",
357 "High 10 Intra",
358 "High 422 Intra",
359 "High 444 Intra",
360 "CAVLC 444 Intra",
361 "Scalable Baseline",
362 "Scalable High",
363 "Scalable High Intra",
364 "Multiview High",
365 NULL,
366 };
367 static const char * const vui_sar_idc[] = {
368 "Unspecified",
369 "1:1",
370 "12:11",
371 "10:11",
372 "16:11",
373 "40:33",
374 "24:11",
375 "20:11",
376 "32:11",
377 "80:33",
378 "18:11",
379 "15:11",
380 "64:33",
381 "160:99",
382 "4:3",
383 "3:2",
384 "2:1",
385 "Extended SAR",
386 NULL,
387 };
2e81dde9
AK		 388 static const char * const h264_fp_arrangement_type[] = {
389 "Checkerboard",
390 "Column",
391 "Row",
392 "Side by Side",
393 "Top Bottom",
394 "Temporal",
395 NULL,
396 };
397 static const char * const h264_fmo_map_type[] = {
398 "Interleaved Slices",
399 "Scattered Slices",
400 "Foreground with Leftover",
401 "Box Out",
402 "Raster Scan",
403 "Wipe Scan",
404 "Explicit",
405 NULL,
406 };
064f5096
KD		 407 static const char * const mpeg_mpeg4_level[] = {
408 "0",
409 "0b",
410 "1",
411 "2",
412 "3",
413 "3b",
414 "4",
415 "5",
416 NULL,
417 };
418 static const char * const mpeg4_profile[] = {
419 "Simple",
f769c260 420 "Advanced Simple",
064f5096
KD		 421 "Core",
422 "Simple Scalable",
39c1cb2b 423 "Advanced Coding Efficiency",
064f5096
KD		 424 NULL,
425 };
426
bc9028e1
AK		 427 static const char * const vpx_golden_frame_sel[] = {
428 "Use Previous Frame",
429 "Use Previous Specific Frame",
430 NULL,
431 };
432
0b159acd
SA		 433 static const char * const flash_led_mode[] = {
434 "Off",
435 "Flash",
436 "Torch",
437 NULL,
438 };
439 static const char * const flash_strobe_source[] = {
440 "Software",
441 "External",
442 NULL,
443 };
0996517c 444
c7361ae1
SN		 445 static const char * const jpeg_chroma_subsampling[] = {
446 "4:4:4",
447 "4:2:2",
448 "4:2:0",
449 "4:1:1",
450 "4:1:0",
451 "Gray",
452 NULL,
453 };
977ebec7
HV		 454 static const char * const dv_tx_mode[] = {
455 "DVI-D",
456 "HDMI",
457 NULL,
458 };
459 static const char * const dv_rgb_range[] = {
460 "Automatic",
461 "RGB limited range (16-235)",
462 "RGB full range (0-255)",
463 NULL,
464 };
a77b4fc0
HV		 465 static const char * const detect_md_mode[] = {
466 "Disabled",
467 "Global",
468 "Threshold Grid",
469 "Region Grid",
470 NULL,
471 };
977ebec7 472
c7361ae1 473
0996517c
HV		 474 switch (id) {
475 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
476 return mpeg_audio_sampling_freq;
477 case V4L2_CID_MPEG_AUDIO_ENCODING:
478 return mpeg_audio_encoding;
479 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
480 return mpeg_audio_l1_bitrate;
481 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
482 return mpeg_audio_l2_bitrate;
483 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
484 return mpeg_audio_l3_bitrate;
485 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
486 return mpeg_audio_ac3_bitrate;
487 case V4L2_CID_MPEG_AUDIO_MODE:
488 return mpeg_audio_mode;
489 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
490 return mpeg_audio_mode_extension;
491 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
492 return mpeg_audio_emphasis;
493 case V4L2_CID_MPEG_AUDIO_CRC:
494 return mpeg_audio_crc;
24c19a21
HV		 495 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
496 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
497 return mpeg_audio_dec_playback;
0996517c
HV		 498 case V4L2_CID_MPEG_VIDEO_ENCODING:
499 return mpeg_video_encoding;
500 case V4L2_CID_MPEG_VIDEO_ASPECT:
501 return mpeg_video_aspect;
502 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
503 return mpeg_video_bitrate_mode;
504 case V4L2_CID_MPEG_STREAM_TYPE:
505 return mpeg_stream_type;
506 case V4L2_CID_MPEG_STREAM_VBI_FMT:
507 return mpeg_stream_vbi_fmt;
508 case V4L2_CID_POWER_LINE_FREQUENCY:
509 return camera_power_line_frequency;
510 case V4L2_CID_EXPOSURE_AUTO:
511 return camera_exposure_auto;
cf072139
SN		 512 case V4L2_CID_EXPOSURE_METERING:
513 return camera_exposure_metering;
2272ab65
SN		 514 case V4L2_CID_AUTO_FOCUS_RANGE:
515 return camera_auto_focus_range;
0996517c
HV		 516 case V4L2_CID_COLORFX:
517 return colorfx;
e40a0573
SN		 518 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
519 return auto_n_preset_white_balance;
7f84ad8b
SN		 520 case V4L2_CID_ISO_SENSITIVITY_AUTO:
521 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 522 case V4L2_CID_SCENE_MODE:
523 return scene_mode;
0996517c 524 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 525 return tune_emphasis;
526 case V4L2_CID_TUNE_DEEMPHASIS:
527 return tune_emphasis;
0b159acd
SA		 528 case V4L2_CID_FLASH_LED_MODE:
529 return flash_led_mode;
530 case V4L2_CID_FLASH_STROBE_SOURCE:
531 return flash_strobe_source;
064f5096
KD		 532 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
533 return header_mode;
534 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
535 return multi_slice;
536 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
537 return entropy_mode;
538 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
539 return mpeg_h264_level;
540 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
541 return h264_loop_filter;
542 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
543 return h264_profile;
544 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
545 return vui_sar_idc;
2e81dde9
AK		 546 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
547 return h264_fp_arrangement_type;
548 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
549 return h264_fmo_map_type;
064f5096
KD		 550 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
551 return mpeg_mpeg4_level;
552 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
553 return mpeg4_profile;
bc9028e1
AK		 554 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
555 return vpx_golden_frame_sel;
c7361ae1
SN		 556 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
557 return jpeg_chroma_subsampling;
977ebec7
HV		 558 case V4L2_CID_DV_TX_MODE:
559 return dv_tx_mode;
560 case V4L2_CID_DV_TX_RGB_RANGE:
561 case V4L2_CID_DV_RX_RGB_RANGE:
562 return dv_rgb_range;
a77b4fc0
HV		 563 case V4L2_CID_DETECT_MD_MODE:
564 return detect_md_mode;
c7361ae1 565
0996517c
HV		 566 default:
567 return NULL;
568 }
569}
570EXPORT_SYMBOL(v4l2_ctrl_get_menu);
571
bc9028e1 572#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 573/*
574 * Returns NULL or an s64 type array containing the menu for given
575 * control ID. The total number of the menu items is returned in @len.
576 */
4eed9b33 577const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 578{
4eed9b33 579 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 580 1, 2, 4, 8,
581 };
582
4eed9b33 583 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 584 1, 2, 3,
585 };
586
d1e9b7c1 587 switch (id) {
bc9028e1
AK		 588 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
589 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
590 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
591 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 592 default:
593 *len = 0;
594 return NULL;
2028c71d 595 }
d1e9b7c1
SN		 596}
597EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
598
0996517c
HV		 599/* Return the control name. */
600const char *v4l2_ctrl_get_name(u32 id)
601{
602 switch (id) {
603 /* USER controls */
59253f29 604 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 605 case V4L2_CID_USER_CLASS: return "User Controls";
606 case V4L2_CID_BRIGHTNESS: return "Brightness";
607 case V4L2_CID_CONTRAST: return "Contrast";
608 case V4L2_CID_SATURATION: return "Saturation";
609 case V4L2_CID_HUE: return "Hue";
610 case V4L2_CID_AUDIO_VOLUME: return "Volume";
611 case V4L2_CID_AUDIO_BALANCE: return "Balance";
612 case V4L2_CID_AUDIO_BASS: return "Bass";
613 case V4L2_CID_AUDIO_TREBLE: return "Treble";
614 case V4L2_CID_AUDIO_MUTE: return "Mute";
615 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 616 case V4L2_CID_BLACK_LEVEL: return "Black Level";
617 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
618 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
619 case V4L2_CID_RED_BALANCE: return "Red Balance";
620 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
621 case V4L2_CID_GAMMA: return "Gamma";
622 case V4L2_CID_EXPOSURE: return "Exposure";
623 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
624 case V4L2_CID_GAIN: return "Gain";
625 case V4L2_CID_HFLIP: return "Horizontal Flip";
626 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 627 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
628 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
629 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
630 case V4L2_CID_SHARPNESS: return "Sharpness";
631 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
632 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 633 case V4L2_CID_COLOR_KILLER: return "Color Killer";
634 case V4L2_CID_COLORFX: return "Color Effects";
635 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
636 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
637 case V4L2_CID_ROTATE: return "Rotate";
638 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 639 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 640 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
641 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 642 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
643 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 644 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 645 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 646
bc9028e1
AK		 647 /* Codec controls */
648 /* The MPEG controls are applicable to all codec controls
649 * and the 'MPEG' part of the define is historical */
6c8d6111 650 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 651 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 652 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
653 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
654 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
655 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
656 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 657 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
658 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
659 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 660 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 661 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
662 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
663 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
664 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
665 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 666 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 667 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
668 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
669 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
670 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
671 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 672 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
673 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 674 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
675 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
676 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
677 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
678 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
679 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
680 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
681 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
682 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 683 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 684 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 685 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 686 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
687 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 688 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 689 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
690 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
691 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 692 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 693 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 694 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
695 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 696 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
697 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
698 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 699 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
700 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 701 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
702 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
703 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
704 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 705 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
706 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 707 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
708 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
709 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
710 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
711 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
712 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
713 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
714 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
715 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 716 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
717 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
718 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
719 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
720 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
721 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
722 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
723 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
724 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
725 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
726 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
727 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
728 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
729 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
730 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
731 return "H264 Set QP Value for HC Layers";
064f5096 732 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 733 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
734 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 735 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
736 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
737 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
738 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
739 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 740 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
741 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
742 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 743 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 744 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
745 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 746 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 747 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
748 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 749 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
0996517c 750
bc9028e1
AK		 751 /* VPX controls */
752 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
753 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
754 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
755 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
756 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
757 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
758 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 759 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
760 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
761 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
762 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 763 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 764
0996517c 765 /* CAMERA controls */
59253f29 766 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 767 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
768 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
769 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
770 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
771 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
772 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
773 case V4L2_CID_PAN_RESET: return "Pan, Reset";
774 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
775 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
776 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
777 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
778 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 779 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 780 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
781 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
782 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
783 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 784 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
785 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 786 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 787 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 788 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 789 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 790 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
791 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 792 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 793 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 794 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 795 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
796 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
797 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
798 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 799 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
800 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 801
59253f29
HV		 802 /* FM Radio Modulator controls */
803 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 804 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
805 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
806 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
807 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
808 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
809 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 810 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
811 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
812 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
813 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
814 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
815 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
816 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
817 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
818 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 819 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
820 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
821 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 822 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 823 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
824 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
825 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
826 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
827 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
828 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
829 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 830 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 831 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
832 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
833
0b159acd 834 /* Flash controls */
59253f29 835 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 836 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
837 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
838 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 839 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 840 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
841 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
842 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
843 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
844 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
845 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 846 case V4L2_CID_FLASH_FAULT: return "Faults";
847 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 848 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 849
c7361ae1 850 /* JPEG encoder controls */
59253f29 851 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 852 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
853 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
854 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
855 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
856 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
857
8c9d236e 858 /* Image source controls */
59253f29 859 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 860 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
861 case V4L2_CID_VBLANK: return "Vertical Blanking";
862 case V4L2_CID_HBLANK: return "Horizontal Blanking";
863 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 864 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
865 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
866 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
867 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 868
c643ee13 869 /* Image processing controls */
59253f29 870 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 871 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
872 case V4L2_CID_LINK_FREQ: return "Link Frequency";
873 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 874 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 875
977ebec7 876 /* DV controls */
59253f29 877 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 878 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
879 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
880 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
881 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
882 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
883 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
884 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
885 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
886
aec330a8
AS		 887 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
888 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
889 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad
AP		 890 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
891 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
892 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
893 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
894 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
895 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
896 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 897 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
898 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 899 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 900 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
901 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
902 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
903 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
904 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
905 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 906
907 /* Detection controls */
908 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
909 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
910 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
911 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
912 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
913 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 914 default:
915 return NULL;
916 }
917}
918EXPORT_SYMBOL(v4l2_ctrl_get_name);
919
920void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 921 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 922{
923 *name = v4l2_ctrl_get_name(id);
924 *flags = 0;
925
926 switch (id) {
927 case V4L2_CID_AUDIO_MUTE:
928 case V4L2_CID_AUDIO_LOUDNESS:
929 case V4L2_CID_AUTO_WHITE_BALANCE:
930 case V4L2_CID_AUTOGAIN:
931 case V4L2_CID_HFLIP:
932 case V4L2_CID_VFLIP:
933 case V4L2_CID_HUE_AUTO:
934 case V4L2_CID_CHROMA_AGC:
935 case V4L2_CID_COLOR_KILLER:
a2f8b84f 936 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 937 case V4L2_CID_MPEG_AUDIO_MUTE:
938 case V4L2_CID_MPEG_VIDEO_MUTE:
939 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
940 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
941 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
942 case V4L2_CID_FOCUS_AUTO:
943 case V4L2_CID_PRIVACY:
944 case V4L2_CID_AUDIO_LIMITER_ENABLED:
945 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
946 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 947 case V4L2_CID_ILLUMINATORS_1:
948 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 949 case V4L2_CID_FLASH_STROBE_STATUS:
950 case V4L2_CID_FLASH_CHARGE:
951 case V4L2_CID_FLASH_READY:
064f5096
KD		 952 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
953 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
954 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
955 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
956 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
957 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
958 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 959 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 960 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 961 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 962 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 963 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
964 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
965 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 966 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 967 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 968 case V4L2_CID_RDS_TX_MONO_STEREO:
969 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
970 case V4L2_CID_RDS_TX_COMPRESSED:
971 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
972 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
973 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
974 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
975 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 976 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
977 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
978 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 979 *type = V4L2_CTRL_TYPE_BOOLEAN;
980 *min = 0;
981 *max = *step = 1;
982 break;
bf0bedd3
AG		 983 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
984 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
985 *type = V4L2_CTRL_TYPE_INTEGER;
986 break;
0996517c
HV		 987 case V4L2_CID_PAN_RESET:
988 case V4L2_CID_TILT_RESET:
0b159acd
SA		 989 case V4L2_CID_FLASH_STROBE:
990 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 991 case V4L2_CID_AUTO_FOCUS_START:
992 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c
HV		 993 *type = V4L2_CTRL_TYPE_BUTTON;
994 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
995 *min = *max = *step = *def = 0;
996 break;
997 case V4L2_CID_POWER_LINE_FREQUENCY:
998 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
999 case V4L2_CID_MPEG_AUDIO_ENCODING:
1000 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1001 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1002 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1003 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1004 case V4L2_CID_MPEG_AUDIO_MODE:
1005 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1006 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1007 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1008 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1009 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1010 case V4L2_CID_MPEG_VIDEO_ENCODING:
1011 case V4L2_CID_MPEG_VIDEO_ASPECT:
1012 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1013 case V4L2_CID_MPEG_STREAM_TYPE:
1014 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1015 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1016 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1017 case V4L2_CID_COLORFX:
e40a0573 1018 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1019 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1020 case V4L2_CID_FLASH_LED_MODE:
1021 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1022 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1023 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1024 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1025 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1026 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1027 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1028 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1029 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1030 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1031 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1032 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1033 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1034 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1035 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1036 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1037 case V4L2_CID_DV_TX_MODE:
1038 case V4L2_CID_DV_TX_RGB_RANGE:
1039 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 1040 case V4L2_CID_TEST_PATTERN:
aec330a8 1041 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1042 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
a77b4fc0 1043 case V4L2_CID_DETECT_MD_MODE:
0996517c
HV		 1044 *type = V4L2_CTRL_TYPE_MENU;
1045 break;
c643ee13
SA		 1046 case V4L2_CID_LINK_FREQ:
1047 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1048 break;
0996517c
HV		 1049 case V4L2_CID_RDS_TX_PS_NAME:
1050 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1051 case V4L2_CID_RDS_RX_PS_NAME:
1052 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1053 *type = V4L2_CTRL_TYPE_STRING;
1054 break;
7f84ad8b 1055 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1056 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1057 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1058 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1059 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1060 break;
0996517c
HV		 1061 case V4L2_CID_USER_CLASS:
1062 case V4L2_CID_CAMERA_CLASS:
1063 case V4L2_CID_MPEG_CLASS:
1064 case V4L2_CID_FM_TX_CLASS:
0b159acd 1065 case V4L2_CID_FLASH_CLASS:
c7361ae1 1066 case V4L2_CID_JPEG_CLASS:
8c9d236e 1067 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1068 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1069 case V4L2_CID_DV_CLASS:
aec330a8 1070 case V4L2_CID_FM_RX_CLASS:
80807fad 1071 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1072 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1073 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1074 /* You can neither read not write these */
1075 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1076 *min = *max = *step = *def = 0;
1077 break;
1078 case V4L2_CID_BG_COLOR:
1079 *type = V4L2_CTRL_TYPE_INTEGER;
1080 *step = 1;
1081 *min = 0;
1082 /* Max is calculated as RGB888 that is 2^24 */
1083 *max = 0xFFFFFF;
1084 break;
0b159acd 1085 case V4L2_CID_FLASH_FAULT:
c7361ae1 1086 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1087 case V4L2_CID_3A_LOCK:
2272ab65 1088 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1089 case V4L2_CID_DV_TX_HOTPLUG:
1090 case V4L2_CID_DV_TX_RXSENSE:
1091 case V4L2_CID_DV_TX_EDID_PRESENT:
1092 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1093 *type = V4L2_CTRL_TYPE_BITMASK;
1094 break;
064f5096
KD		 1095 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1096 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1097 *type = V4L2_CTRL_TYPE_INTEGER;
1098 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1099 break;
24c19a21 1100 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1101 *type = V4L2_CTRL_TYPE_INTEGER64;
1102 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1103 *min = *def = 0;
1104 *max = 0x1ffffffffLL;
1105 *step = 1;
1106 break;
1107 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1108 *type = V4L2_CTRL_TYPE_INTEGER64;
1109 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1110 *min = *def = 0;
1111 *max = 0x7fffffffffffffffLL;
1112 *step = 1;
1113 break;
c643ee13 1114 case V4L2_CID_PIXEL_RATE:
24c19a21 1115 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1116 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1117 break;
a77b4fc0
HV		 1118 case V4L2_CID_DETECT_MD_REGION_GRID:
1119 *type = V4L2_CTRL_TYPE_U8;
1120 break;
1121 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1122 *type = V4L2_CTRL_TYPE_U16;
1123 break;
811c5081
HV		 1124 case V4L2_CID_RDS_TX_ALT_FREQS:
1125 *type = V4L2_CTRL_TYPE_U32;
1126 break;
0996517c
HV		 1127 default:
1128 *type = V4L2_CTRL_TYPE_INTEGER;
1129 break;
1130 }
1131 switch (id) {
1132 case V4L2_CID_MPEG_AUDIO_ENCODING:
1133 case V4L2_CID_MPEG_AUDIO_MODE:
1134 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1135 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1136 case V4L2_CID_MPEG_STREAM_TYPE:
1137 *flags |= V4L2_CTRL_FLAG_UPDATE;
1138 break;
1139 case V4L2_CID_AUDIO_VOLUME:
1140 case V4L2_CID_AUDIO_BALANCE:
1141 case V4L2_CID_AUDIO_BASS:
1142 case V4L2_CID_AUDIO_TREBLE:
1143 case V4L2_CID_BRIGHTNESS:
1144 case V4L2_CID_CONTRAST:
1145 case V4L2_CID_SATURATION:
1146 case V4L2_CID_HUE:
1147 case V4L2_CID_RED_BALANCE:
1148 case V4L2_CID_BLUE_BALANCE:
1149 case V4L2_CID_GAMMA:
1150 case V4L2_CID_SHARPNESS:
1151 case V4L2_CID_CHROMA_GAIN:
1152 case V4L2_CID_RDS_TX_DEVIATION:
1153 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1154 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1155 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1156 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1157 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1158 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1159 case V4L2_CID_PILOT_TONE_DEVIATION:
1160 case V4L2_CID_PILOT_TONE_FREQUENCY:
1161 case V4L2_CID_TUNE_POWER_LEVEL:
1162 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
80807fad
AP		 1163 case V4L2_CID_RF_TUNER_LNA_GAIN:
1164 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1165 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1166 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1167 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1168 *flags |= V4L2_CTRL_FLAG_SLIDER;
1169 break;
1170 case V4L2_CID_PAN_RELATIVE:
1171 case V4L2_CID_TILT_RELATIVE:
1172 case V4L2_CID_FOCUS_RELATIVE:
1173 case V4L2_CID_IRIS_RELATIVE:
1174 case V4L2_CID_ZOOM_RELATIVE:
1175 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1176 break;
0b159acd 1177 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1178 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1179 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1180 case V4L2_CID_DV_TX_HOTPLUG:
1181 case V4L2_CID_DV_TX_RXSENSE:
1182 case V4L2_CID_DV_TX_EDID_PRESENT:
1183 case V4L2_CID_DV_RX_POWER_PRESENT:
9570a148
HV		 1184 case V4L2_CID_RDS_RX_PTY:
1185 case V4L2_CID_RDS_RX_PS_NAME:
1186 case V4L2_CID_RDS_RX_RADIO_TEXT:
1187 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1188 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1189 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1190 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1191 break;
9aa4357e
AP		 1192 case V4L2_CID_RF_TUNER_PLL_LOCK:
1193 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1194 break;
0996517c
HV		 1195 }
1196}
1197EXPORT_SYMBOL(v4l2_ctrl_fill);
1198
6e239399
HV		 1199static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1200{
1201 memset(ev->reserved, 0, sizeof(ev->reserved));
1202 ev->type = V4L2_EVENT_CTRL;
1203 ev->id = ctrl->id;
1204 ev->u.ctrl.changes = changes;
1205 ev->u.ctrl.type = ctrl->type;
1206 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1207 if (ctrl->is_ptr)
6e239399
HV		 1208 ev->u.ctrl.value64 = 0;
1209 else
2a9ec373 1210 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1211 ev->u.ctrl.minimum = ctrl->minimum;
1212 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1213 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1214 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1215 ev->u.ctrl.step = 1;
1216 else
1217 ev->u.ctrl.step = ctrl->step;
1218 ev->u.ctrl.default_value = ctrl->default_value;
1219}
1220
1221static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1222{
1223 struct v4l2_event ev;
77068d36 1224 struct v4l2_subscribed_event *sev;
6e239399 1225
77068d36 1226 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1227 return;
6e239399
HV		 1228 fill_event(&ev, ctrl, changes);
1229
77068d36 1230 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1231 if (sev->fh != fh ||
1232 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1233 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1234}
1235
998e7659 1236static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1237 union v4l2_ctrl_ptr ptr1,
1238 union v4l2_ctrl_ptr ptr2)
1239{
1240 switch (ctrl->type) {
1241 case V4L2_CTRL_TYPE_BUTTON:
1242 return false;
1243 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1244 idx *= ctrl->elem_size;
0176077a 1245 /* strings are always 0-terminated */
265c7f8a 1246 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1247 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1248 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1249 case V4L2_CTRL_TYPE_U8:
1250 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1251 case V4L2_CTRL_TYPE_U16:
1252 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1253 case V4L2_CTRL_TYPE_U32:
1254 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1255 default:
265c7f8a
HV		 1256 if (ctrl->is_int)
1257 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1258 idx *= ctrl->elem_size;
1259 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1260 }
1261}
1262
998e7659 1263static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1264 union v4l2_ctrl_ptr ptr)
1265{
1266 switch (ctrl->type) {
1267 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1268 idx *= ctrl->elem_size;
1269 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1270 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1271 break;
1272 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1273 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1274 break;
1275 case V4L2_CTRL_TYPE_INTEGER:
1276 case V4L2_CTRL_TYPE_INTEGER_MENU:
1277 case V4L2_CTRL_TYPE_MENU:
1278 case V4L2_CTRL_TYPE_BITMASK:
1279 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1280 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1281 break;
dda4a4d5
HV		 1282 case V4L2_CTRL_TYPE_U8:
1283 ptr.p_u8[idx] = ctrl->default_value;
1284 break;
1285 case V4L2_CTRL_TYPE_U16:
1286 ptr.p_u16[idx] = ctrl->default_value;
1287 break;
811c5081
HV		 1288 case V4L2_CTRL_TYPE_U32:
1289 ptr.p_u32[idx] = ctrl->default_value;
1290 break;
0176077a 1291 default:
302ab7ce
HV		 1292 idx *= ctrl->elem_size;
1293 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1294 break;
1295 }
1296}
1297
1298static void std_log(const struct v4l2_ctrl *ctrl)
1299{
1300 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1301
998e7659
HV		 1302 if (ctrl->is_array) {
1303 unsigned i;
1304
1305 for (i = 0; i < ctrl->nr_of_dims; i++)
1306 pr_cont("[%u]", ctrl->dims[i]);
1307 pr_cont(" ");
1308 }
1309
0176077a
HV		 1310 switch (ctrl->type) {
1311 case V4L2_CTRL_TYPE_INTEGER:
1312 pr_cont("%d", *ptr.p_s32);
1313 break;
1314 case V4L2_CTRL_TYPE_BOOLEAN:
1315 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1316 break;
1317 case V4L2_CTRL_TYPE_MENU:
1318 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1319 break;
1320 case V4L2_CTRL_TYPE_INTEGER_MENU:
1321 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1322 break;
1323 case V4L2_CTRL_TYPE_BITMASK:
1324 pr_cont("0x%08x", *ptr.p_s32);
1325 break;
1326 case V4L2_CTRL_TYPE_INTEGER64:
1327 pr_cont("%lld", *ptr.p_s64);
1328 break;
1329 case V4L2_CTRL_TYPE_STRING:
1330 pr_cont("%s", ptr.p_char);
1331 break;
dda4a4d5
HV		 1332 case V4L2_CTRL_TYPE_U8:
1333 pr_cont("%u", (unsigned)*ptr.p_u8);
1334 break;
1335 case V4L2_CTRL_TYPE_U16:
1336 pr_cont("%u", (unsigned)*ptr.p_u16);
1337 break;
811c5081
HV		 1338 case V4L2_CTRL_TYPE_U32:
1339 pr_cont("%u", (unsigned)*ptr.p_u32);
1340 break;
0176077a
HV		 1341 default:
1342 pr_cont("unknown type %d", ctrl->type);
1343 break;
1344 }
1345}
1346
958c7c7e
HV		 1347/*
1348 * Round towards the closest legal value. Be careful when we are
1349 * close to the maximum range of the control type to prevent
1350 * wrap-arounds.
1351 */
0176077a
HV		 1352#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1353({ \
1354 offset_type offset; \
958c7c7e 1355 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1356 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1357 val = (ctrl)->maximum; \
1358 else \
9c9cb1fa 1359 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1360 val = clamp_t(typeof(val), val, \
1361 (ctrl)->minimum, (ctrl)->maximum); \
1362 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1363 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1364 val = (ctrl)->minimum + offset; \
1365 0; \
1366})
1367
1368/* Validate a new control */
998e7659 1369static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1370 union v4l2_ctrl_ptr ptr)
1371{
1372 size_t len;
0d5e8c43
HV		 1373 u64 offset;
1374 s64 val;
0176077a
HV		 1375
1376 switch (ctrl->type) {
1377 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1378 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1379 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1380 /*
1381 * We can't use the ROUND_TO_RANGE define here due to
1382 * the u64 divide that needs special care.
1383 */
1384 val = ptr.p_s64[idx];
9c9cb1fa 1385 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1386 val = ctrl->maximum;
1387 else
9c9cb1fa 1388 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1389 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1390 offset = val - ctrl->minimum;
1391 do_div(offset, ctrl->step);
1392 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1393 return 0;
dda4a4d5
HV		 1394 case V4L2_CTRL_TYPE_U8:
1395 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1396 case V4L2_CTRL_TYPE_U16:
1397 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1398 case V4L2_CTRL_TYPE_U32:
1399 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1400
1401 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1402 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1403 return 0;
1404
1405 case V4L2_CTRL_TYPE_MENU:
1406 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1407 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1408 return -ERANGE;
265c7f8a 1409 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1410 return -EINVAL;
1411 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1412 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1413 return -EINVAL;
1414 return 0;
1415
1416 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1417 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1418 return 0;
1419
1420 case V4L2_CTRL_TYPE_BUTTON:
1421 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1422 ptr.p_s32[idx] = 0;
0176077a
HV		 1423 return 0;
1424
1425 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1426 idx *= ctrl->elem_size;
1427 len = strlen(ptr.p_char + idx);
0176077a
HV		 1428 if (len < ctrl->minimum)
1429 return -ERANGE;
0d5e8c43 1430 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1431 return -ERANGE;
1432 return 0;
1433
1434 default:
1435 return -EINVAL;
1436 }
1437}
1438
1439static const struct v4l2_ctrl_type_ops std_type_ops = {
1440 .equal = std_equal,
1441 .init = std_init,
1442 .log = std_log,
1443 .validate = std_validate,
1444};
1445
000e4f9a
HV		 1446/* Helper function: copy the given control value back to the caller */
1447static int ptr_to_user(struct v4l2_ext_control *c,
1448 struct v4l2_ctrl *ctrl,
1449 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1450{
1451 u32 len;
1452
d9a25471 1453 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1454 return copy_to_user(c->ptr, ptr.p, c->size) ?
1455 -EFAULT : 0;
d9a25471 1456
0996517c
HV		 1457 switch (ctrl->type) {
1458 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1459 len = strlen(ptr.p_char);
0996517c 1460 if (c->size < len + 1) {
c336f75e 1461 c->size = ctrl->elem_size;
0996517c
HV		 1462 return -ENOSPC;
1463 }
000e4f9a 1464 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1465 -EFAULT : 0;
0996517c 1466 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1467 c->value64 = *ptr.p_s64;
0996517c
HV		 1468 break;
1469 default:
000e4f9a 1470 c->value = *ptr.p_s32;
0996517c
HV		 1471 break;
1472 }
1473 return 0;
1474}
1475
000e4f9a
HV		 1476/* Helper function: copy the current control value back to the caller */
1477static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1478 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1479{
1480 return ptr_to_user(c, ctrl, ctrl->p_cur);
1481}
1482
1483/* Helper function: copy the new control value back to the caller */
1484static int new_to_user(struct v4l2_ext_control *c,
1485 struct v4l2_ctrl *ctrl)
1486{
1487 return ptr_to_user(c, ctrl, ctrl->p_new);
1488}
1489
1490/* Helper function: copy the caller-provider value to the given control value */
1491static int user_to_ptr(struct v4l2_ext_control *c,
1492 struct v4l2_ctrl *ctrl,
1493 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1494{
1495 int ret;
1496 u32 size;
1497
2a863793 1498 ctrl->is_new = 1;
302ab7ce
HV		 1499 if (ctrl->is_ptr && !ctrl->is_string) {
1500 unsigned idx;
1501
40265bbe 1502 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1503 if (ret || !ctrl->is_array)
1504 return ret;
1505 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1506 ctrl->type_ops->init(ctrl, idx, ptr);
1507 return 0;
1508 }
d9a25471 1509
0996517c
HV		 1510 switch (ctrl->type) {
1511 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1512 *ptr.p_s64 = c->value64;
0996517c
HV		 1513 break;
1514 case V4L2_CTRL_TYPE_STRING:
1515 size = c->size;
1516 if (size == 0)
1517 return -ERANGE;
1518 if (size > ctrl->maximum + 1)
1519 size = ctrl->maximum + 1;
40265bbe 1520 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1521 if (!ret) {
000e4f9a 1522 char last = ptr.p_char[size - 1];
0996517c 1523
000e4f9a 1524 ptr.p_char[size - 1] = 0;
0996517c
HV		 1525 /* If the string was longer than ctrl->maximum,
1526 then return an error. */
000e4f9a 1527 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1528 return -ERANGE;
1529 }
40265bbe 1530 return ret;
0996517c 1531 default:
000e4f9a 1532 *ptr.p_s32 = c->value;
0996517c
HV		 1533 break;
1534 }
1535 return 0;
1536}
1537
000e4f9a
HV		 1538/* Helper function: copy the caller-provider value as the new control value */
1539static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1540 struct v4l2_ctrl *ctrl)
1541{
000e4f9a
HV		 1542 return user_to_ptr(c, ctrl, ctrl->p_new);
1543}
d9a25471 1544
000e4f9a
HV		 1545/* Copy the one value to another. */
1546static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1547 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1548{
1549 if (ctrl == NULL)
1550 return;
302ab7ce 1551 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1552}
1553
1554/* Copy the new value to the current value. */
2ccbe779 1555static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1556{
000e4f9a 1557 bool changed;
6e239399 1558
0996517c
HV		 1559 if (ctrl == NULL)
1560 return;
9ea1b7a4
HV		 1561
1562 /* has_changed is set by cluster_changed */
1563 changed = ctrl->has_changed;
1564 if (changed)
1565 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1566
2ccbe779
SN		 1567 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1568 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1569 ctrl->flags &=
1570 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1571 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1572 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1573 if (ctrl->cluster[0]->has_volatiles)
1574 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1575 }
1249a3a8 1576 fh = NULL;
72d877ca 1577 }
2ccbe779 1578 if (changed || ch_flags) {
639884a6
HV		 1579 /* If a control was changed that was not one of the controls
1580 modified by the application, then send the event to all. */
1581 if (!ctrl->is_new)
1582 fh = NULL;
6e239399 1583 send_event(fh, ctrl,
2ccbe779 1584 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1585 if (ctrl->call_notify && changed && ctrl->handler->notify)
1586 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1587 }
0996517c
HV		 1588}
1589
1590/* Copy the current value to the new value */
1591static void cur_to_new(struct v4l2_ctrl *ctrl)
1592{
1593 if (ctrl == NULL)
1594 return;
000e4f9a 1595 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1596}
1597
1598/* Return non-zero if one or more of the controls in the cluster has a new
1599 value that differs from the current value. */
1600static int cluster_changed(struct v4l2_ctrl *master)
1601{
9ea1b7a4 1602 bool changed = false;
302ab7ce 1603 unsigned idx;
0996517c
HV		 1604 int i;
1605
9ea1b7a4 1606 for (i = 0; i < master->ncontrols; i++) {
0996517c 1607 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1608 bool ctrl_changed = false;
0996517c
HV		 1609
1610 if (ctrl == NULL)
1611 continue;
302ab7ce
HV		 1612 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1613 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1614 ctrl->p_cur, ctrl->p_new);
302ab7ce 1615 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1616 changed |= ctrl->has_changed;
0996517c 1617 }
9ea1b7a4 1618 return changed;
0996517c
HV		 1619}
1620
2ccbe779
SN		 1621/* Control range checking */
1622static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1623 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1624{
1625 switch (type) {
1626 case V4L2_CTRL_TYPE_BOOLEAN:
1627 if (step != 1 || max > 1 || min < 0)
1628 return -ERANGE;
1629 /* fall through */
dda4a4d5
HV		 1630 case V4L2_CTRL_TYPE_U8:
1631 case V4L2_CTRL_TYPE_U16:
811c5081 1632 case V4L2_CTRL_TYPE_U32:
2ccbe779 1633 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1634 case V4L2_CTRL_TYPE_INTEGER64:
1635 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1636 return -ERANGE;
1637 return 0;
1638 case V4L2_CTRL_TYPE_BITMASK:
1639 if (step || min || !max || (def & ~max))
1640 return -ERANGE;
1641 return 0;
1642 case V4L2_CTRL_TYPE_MENU:
1643 case V4L2_CTRL_TYPE_INTEGER_MENU:
1644 if (min > max || def < min || def > max)
1645 return -ERANGE;
1646 /* Note: step == menu_skip_mask for menu controls.
1647 So here we check if the default value is masked out. */
1648 if (step && ((1 << def) & step))
1649 return -EINVAL;
1650 return 0;
1651 case V4L2_CTRL_TYPE_STRING:
1652 if (min > max || min < 0 || step < 1 || def)
1653 return -ERANGE;
1654 return 0;
1655 default:
1656 return 0;
1657 }
1658}
1659
03d5285b 1660/* Validate a new control */
7a7f1ab3 1661static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1662{
302ab7ce
HV		 1663 unsigned idx;
1664 int err = 0;
1665
1666 if (!ctrl->is_ptr) {
1667 switch (ctrl->type) {
1668 case V4L2_CTRL_TYPE_INTEGER:
1669 case V4L2_CTRL_TYPE_INTEGER_MENU:
1670 case V4L2_CTRL_TYPE_MENU:
1671 case V4L2_CTRL_TYPE_BITMASK:
1672 case V4L2_CTRL_TYPE_BOOLEAN:
1673 case V4L2_CTRL_TYPE_BUTTON:
1674 case V4L2_CTRL_TYPE_CTRL_CLASS:
302ab7ce 1675 case V4L2_CTRL_TYPE_INTEGER64:
7a7f1ab3 1676 return ctrl->type_ops->validate(ctrl, 0, p_new);
302ab7ce
HV		 1677 default:
1678 break;
1679 }
0996517c 1680 }
7a7f1ab3
HV		 1681 for (idx = 0; !err && idx < ctrl->elems; idx++)
1682 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1683 return err;
0996517c
HV		 1684}
1685
1686static inline u32 node2id(struct list_head *node)
1687{
1688 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1689}
1690
1691/* Set the handler's error code if it wasn't set earlier already */
1692static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1693{
1694 if (hdl->error == 0)
1695 hdl->error = err;
1696 return err;
1697}
1698
1699/* Initialize the handler */
6cd247ef
AW		 1700int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1701 unsigned nr_of_controls_hint,
1702 struct lock_class_key *key, const char *name)
0996517c 1703{
77e7c4e6
SA		 1704 hdl->lock = &hdl->_lock;
1705 mutex_init(hdl->lock);
6cd247ef 1706 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1707 INIT_LIST_HEAD(&hdl->ctrls);
1708 INIT_LIST_HEAD(&hdl->ctrl_refs);
1709 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1710 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1711 GFP_KERNEL);
0996517c
HV		 1712 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1713 return hdl->error;
1714}
6cd247ef 1715EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1716
1717/* Free all controls and control refs */
1718void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1719{
1720 struct v4l2_ctrl_ref *ref, *next_ref;
1721 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1722 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1723
1724 if (hdl == NULL || hdl->buckets == NULL)
1725 return;
1726
77e7c4e6 1727 mutex_lock(hdl->lock);
0996517c
HV		 1728 /* Free all nodes */
1729 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1730 list_del(&ref->node);
1731 kfree(ref);
1732 }
1733 /* Free all controls owned by the handler */
1734 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1735 list_del(&ctrl->node);
77068d36
HV		 1736 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1737 list_del(&sev->node);
0996517c
HV		 1738 kfree(ctrl);
1739 }
1740 kfree(hdl->buckets);
1741 hdl->buckets = NULL;
1742 hdl->cached = NULL;
1743 hdl->error = 0;
77e7c4e6 1744 mutex_unlock(hdl->lock);
0996517c
HV		 1745}
1746EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1747
1748/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1749 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1750 with applications that do not use the NEXT_CTRL flag.
1751
1752 We just find the n-th private user control. It's O(N), but that should not
1753 be an issue in this particular case. */
1754static struct v4l2_ctrl_ref *find_private_ref(
1755 struct v4l2_ctrl_handler *hdl, u32 id)
1756{
1757 struct v4l2_ctrl_ref *ref;
1758
1759 id -= V4L2_CID_PRIVATE_BASE;
1760 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1761 /* Search for private user controls that are compatible with
1762 VIDIOC_G/S_CTRL. */
1763 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1764 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1765 if (!ref->ctrl->is_int)
0996517c
HV		 1766 continue;
1767 if (id == 0)
1768 return ref;
1769 id--;
1770 }
1771 }
1772 return NULL;
1773}
1774
1775/* Find a control with the given ID. */
1776static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1777{
1778 struct v4l2_ctrl_ref *ref;
1779 int bucket;
1780
1781 id &= V4L2_CTRL_ID_MASK;
1782
1783 /* Old-style private controls need special handling */
1784 if (id >= V4L2_CID_PRIVATE_BASE)
1785 return find_private_ref(hdl, id);
1786 bucket = id % hdl->nr_of_buckets;
1787
1788 /* Simple optimization: cache the last control found */
1789 if (hdl->cached && hdl->cached->ctrl->id == id)
1790 return hdl->cached;
1791
1792 /* Not in cache, search the hash */
1793 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1794 while (ref && ref->ctrl->id != id)
1795 ref = ref->next;
1796
1797 if (ref)
1798 hdl->cached = ref; /* cache it! */
1799 return ref;
1800}
1801
1802/* Find a control with the given ID. Take the handler's lock first. */
1803static struct v4l2_ctrl_ref *find_ref_lock(
1804 struct v4l2_ctrl_handler *hdl, u32 id)
1805{
1806 struct v4l2_ctrl_ref *ref = NULL;
1807
1808 if (hdl) {
77e7c4e6 1809 mutex_lock(hdl->lock);
0996517c 1810 ref = find_ref(hdl, id);
77e7c4e6 1811 mutex_unlock(hdl->lock);
0996517c
HV		 1812 }
1813 return ref;
1814}
1815
1816/* Find a control with the given ID. */
1817struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1818{
1819 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1820
1821 return ref ? ref->ctrl : NULL;
1822}
1823EXPORT_SYMBOL(v4l2_ctrl_find);
1824
1825/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1826static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1827 struct v4l2_ctrl *ctrl)
1828{
1829 struct v4l2_ctrl_ref *ref;
1830 struct v4l2_ctrl_ref *new_ref;
1831 u32 id = ctrl->id;
1832 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1833 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1834
d9a25471
HV		 1835 /*
1836 * Automatically add the control class if it is not yet present and
1837 * the new control is not a compound control.
1838 */
1839 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1840 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1841 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1842 return hdl->error;
1843
1844 if (hdl->error)
1845 return hdl->error;
1846
1847 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1848 if (!new_ref)
1849 return handler_set_err(hdl, -ENOMEM);
1850 new_ref->ctrl = ctrl;
1851 if (ctrl->handler == hdl) {
1852 /* By default each control starts in a cluster of its own.
1853 new_ref->ctrl is basically a cluster array with one
1854 element, so that's perfect to use as the cluster pointer.
1855 But only do this for the handler that owns the control. */
1856 ctrl->cluster = &new_ref->ctrl;
1857 ctrl->ncontrols = 1;
1858 }
1859
1860 INIT_LIST_HEAD(&new_ref->node);
1861
77e7c4e6 1862 mutex_lock(hdl->lock);
0996517c
HV		 1863
1864 /* Add immediately at the end of the list if the list is empty, or if
1865 the last element in the list has a lower ID.
1866 This ensures that when elements are added in ascending order the
1867 insertion is an O(1) operation. */
1868 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1869 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1870 goto insert_in_hash;
1871 }
1872
1873 /* Find insert position in sorted list */
1874 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1875 if (ref->ctrl->id < id)
1876 continue;
1877 /* Don't add duplicates */
1878 if (ref->ctrl->id == id) {
1879 kfree(new_ref);
1880 goto unlock;
1881 }
1882 list_add(&new_ref->node, ref->node.prev);
1883 break;
1884 }
1885
1886insert_in_hash:
1887 /* Insert the control node in the hash */
1888 new_ref->next = hdl->buckets[bucket];
1889 hdl->buckets[bucket] = new_ref;
1890
1891unlock:
77e7c4e6 1892 mutex_unlock(hdl->lock);
0996517c
HV		 1893 return 0;
1894}
1895
1896/* Add a new control */
1897static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1898 const struct v4l2_ctrl_ops *ops,
0176077a 1899 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1900 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1901 s64 min, s64 max, u64 step, s64 def,
20d88eef 1902 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1903 u32 flags, const char * const *qmenu,
1904 const s64 *qmenu_int, void *priv)
0996517c
HV		 1905{
1906 struct v4l2_ctrl *ctrl;
d9a25471 1907 unsigned sz_extra;
20d88eef
HV		 1908 unsigned nr_of_dims = 0;
1909 unsigned elems = 1;
998e7659
HV		 1910 bool is_array;
1911 unsigned tot_ctrl_size;
302ab7ce 1912 unsigned idx;
d9a25471 1913 void *data;
2ccbe779 1914 int err;
0996517c
HV		 1915
1916 if (hdl->error)
1917 return NULL;
1918
20d88eef
HV		 1919 while (dims && dims[nr_of_dims]) {
1920 elems *= dims[nr_of_dims];
1921 nr_of_dims++;
1922 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1923 break;
1924 }
998e7659 1925 is_array = nr_of_dims > 0;
20d88eef 1926
dda4a4d5
HV		 1927 /* Prefill elem_size for all types handled by std_type_ops */
1928 switch (type) {
1929 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1930 elem_size = sizeof(s64);
dda4a4d5
HV		 1931 break;
1932 case V4L2_CTRL_TYPE_STRING:
d9a25471 1933 elem_size = max + 1;
dda4a4d5
HV		 1934 break;
1935 case V4L2_CTRL_TYPE_U8:
1936 elem_size = sizeof(u8);
1937 break;
1938 case V4L2_CTRL_TYPE_U16:
1939 elem_size = sizeof(u16);
1940 break;
811c5081
HV		 1941 case V4L2_CTRL_TYPE_U32:
1942 elem_size = sizeof(u32);
1943 break;
dda4a4d5
HV		 1944 default:
1945 if (type < V4L2_CTRL_COMPOUND_TYPES)
1946 elem_size = sizeof(s32);
1947 break;
1948 }
998e7659 1949 tot_ctrl_size = elem_size * elems;
d9a25471 1950
0996517c 1951 /* Sanity checks */
998e7659
HV		 1952 if (id == 0 || name == NULL || !elem_size ||
1953 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1954 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1955 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1956 handler_set_err(hdl, -ERANGE);
1957 return NULL;
1958 }
2ccbe779
SN		 1959 err = check_range(type, min, max, step, def);
1960 if (err) {
1961 handler_set_err(hdl, err);
02ac0480
HV		 1962 return NULL;
1963 }
fa4d7096
HV		 1964 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1965 handler_set_err(hdl, -ERANGE);
1966 return NULL;
1967 }
998e7659
HV		 1968 if (is_array &&
1969 (type == V4L2_CTRL_TYPE_BUTTON ||
1970 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
1971 handler_set_err(hdl, -EINVAL);
1972 return NULL;
1973 }
0996517c 1974
d9a25471 1975 sz_extra = 0;
0996517c
HV		 1976 if (type == V4L2_CTRL_TYPE_BUTTON)
1977 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1978 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1979 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 1980 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
1981 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 1982 type >= V4L2_CTRL_COMPOUND_TYPES ||
1983 is_array)
1984 sz_extra += 2 * tot_ctrl_size;
0996517c
HV		 1985
1986 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1987 if (ctrl == NULL) {
1988 handler_set_err(hdl, -ENOMEM);
1989 return NULL;
1990 }
1991
1992 INIT_LIST_HEAD(&ctrl->node);
77068d36 1993 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1994 ctrl->handler = hdl;
1995 ctrl->ops = ops;
0176077a 1996 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 1997 ctrl->id = id;
1998 ctrl->name = name;
1999 ctrl->type = type;
2000 ctrl->flags = flags;
2001 ctrl->minimum = min;
2002 ctrl->maximum = max;
2003 ctrl->step = step;
d9a25471 2004 ctrl->default_value = def;
998e7659
HV		 2005 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2006 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2007 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2008 ctrl->is_array = is_array;
20d88eef
HV		 2009 ctrl->elems = elems;
2010 ctrl->nr_of_dims = nr_of_dims;
2011 if (nr_of_dims)
2012 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2013 ctrl->elem_size = elem_size;
ce580fe5
SA		 2014 if (type == V4L2_CTRL_TYPE_MENU)
2015 ctrl->qmenu = qmenu;
2016 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2017 ctrl->qmenu_int = qmenu_int;
0996517c 2018 ctrl->priv = priv;
d9a25471 2019 ctrl->cur.val = ctrl->val = def;
2a9ec373 2020 data = &ctrl[1];
d9a25471 2021
2a9ec373
HV		 2022 if (!ctrl->is_int) {
2023 ctrl->p_new.p = data;
998e7659 2024 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2025 } else {
2026 ctrl->p_new.p = &ctrl->val;
2027 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2028 }
302ab7ce
HV		 2029 for (idx = 0; idx < elems; idx++) {
2030 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2031 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2032 }
0176077a 2033
0996517c
HV		 2034 if (handler_new_ref(hdl, ctrl)) {
2035 kfree(ctrl);
2036 return NULL;
2037 }
77e7c4e6 2038 mutex_lock(hdl->lock);
0996517c 2039 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2040 mutex_unlock(hdl->lock);
0996517c
HV		 2041 return ctrl;
2042}
2043
2044struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2045 const struct v4l2_ctrl_config *cfg, void *priv)
2046{
2047 bool is_menu;
2048 struct v4l2_ctrl *ctrl;
2049 const char *name = cfg->name;
513521ea 2050 const char * const *qmenu = cfg->qmenu;
ce580fe5 2051 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2052 enum v4l2_ctrl_type type = cfg->type;
2053 u32 flags = cfg->flags;
0ba2aeb6
HV		 2054 s64 min = cfg->min;
2055 s64 max = cfg->max;
2056 u64 step = cfg->step;
2057 s64 def = cfg->def;
0996517c
HV		 2058
2059 if (name == NULL)
2060 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2061 &def, &flags);
2062
ce580fe5
SA		 2063 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2064 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2065 if (is_menu)
2066 WARN_ON(step);
2067 else
2068 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2069 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2070 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2071 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2072 qmenu_int == NULL) {
2073 handler_set_err(hdl, -EINVAL);
2074 return NULL;
2075 }
0996517c 2076
0176077a 2077 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2078 type, min, max,
20d88eef
HV		 2079 is_menu ? cfg->menu_skip_mask : step, def,
2080 cfg->dims, cfg->elem_size,
d9a25471 2081 flags, qmenu, qmenu_int, priv);
88365105 2082 if (ctrl)
0996517c 2083 ctrl->is_private = cfg->is_private;
0996517c
HV		 2084 return ctrl;
2085}
2086EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2087
2088/* Helper function for standard non-menu controls */
2089struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2090 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2091 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2092{
2093 const char *name;
2094 enum v4l2_ctrl_type type;
2095 u32 flags;
2096
2097 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2098 if (type == V4L2_CTRL_TYPE_MENU ||
2099 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2100 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2101 handler_set_err(hdl, -EINVAL);
2102 return NULL;
2103 }
0176077a 2104 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2105 min, max, step, def, NULL, 0,
d9a25471 2106 flags, NULL, NULL, NULL);
0996517c
HV		 2107}
2108EXPORT_SYMBOL(v4l2_ctrl_new_std);
2109
2110/* Helper function for standard menu controls */
2111struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2112 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2113 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2114{
d1e9b7c1
SN		 2115 const char * const *qmenu = NULL;
2116 const s64 *qmenu_int = NULL;
fbbb29a6 2117 unsigned int qmenu_int_len = 0;
0996517c
HV		 2118 const char *name;
2119 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2120 s64 min;
2121 s64 max = _max;
2122 s64 def = _def;
2123 u64 step;
0996517c
HV		 2124 u32 flags;
2125
2126 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2127
2128 if (type == V4L2_CTRL_TYPE_MENU)
2129 qmenu = v4l2_ctrl_get_menu(id);
2130 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2131 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2132
2133 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2134 handler_set_err(hdl, -EINVAL);
2135 return NULL;
2136 }
0176077a 2137 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2138 0, max, mask, def, NULL, 0,
d9a25471 2139 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2140}
2141EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2142
117a711a
LP		 2143/* Helper function for standard menu controls with driver defined menu */
2144struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2145 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2146 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2147{
2148 enum v4l2_ctrl_type type;
2149 const char *name;
2150 u32 flags;
0ba2aeb6
HV		 2151 u64 step;
2152 s64 min;
2153 s64 max = _max;
2154 s64 def = _def;
117a711a
LP		 2155
2156 /* v4l2_ctrl_new_std_menu_items() should only be called for
2157 * standard controls without a standard menu.
2158 */
2159 if (v4l2_ctrl_get_menu(id)) {
2160 handler_set_err(hdl, -EINVAL);
2161 return NULL;
2162 }
2163
2164 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2165 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2166 handler_set_err(hdl, -EINVAL);
2167 return NULL;
2168 }
0176077a 2169 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2170 0, max, mask, def, NULL, 0,
2171 flags, qmenu, NULL, NULL);
117a711a
LP		 2172
2173}
2174EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2175
515f3287
SN		 2176/* Helper function for standard integer menu controls */
2177struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2178 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2179 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2180{
2181 const char *name;
2182 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2183 s64 min;
2184 u64 step;
2185 s64 max = _max;
2186 s64 def = _def;
515f3287
SN		 2187 u32 flags;
2188
2189 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2190 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2191 handler_set_err(hdl, -EINVAL);
2192 return NULL;
2193 }
0176077a 2194 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2195 0, max, 0, def, NULL, 0,
d9a25471 2196 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2197}
2198EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2199
0996517c
HV		 2200/* Add a control from another handler to this handler */
2201struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
2202 struct v4l2_ctrl *ctrl)
2203{
2204 if (hdl == NULL || hdl->error)
2205 return NULL;
2206 if (ctrl == NULL) {
2207 handler_set_err(hdl, -EINVAL);
2208 return NULL;
2209 }
2210 if (ctrl->handler == hdl)
2211 return ctrl;
2212 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
2213}
2214EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
2215
2216/* Add the controls from another handler to our own. */
2217int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2218 struct v4l2_ctrl_handler *add,
2219 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2220{
072e6602 2221 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2222 int ret = 0;
2223
2224 /* Do nothing if either handler is NULL or if they are the same */
2225 if (!hdl || !add || hdl == add)
2226 return 0;
2227 if (hdl->error)
2228 return hdl->error;
77e7c4e6 2229 mutex_lock(add->lock);
072e6602
HV		 2230 list_for_each_entry(ref, &add->ctrl_refs, node) {
2231 struct v4l2_ctrl *ctrl = ref->ctrl;
2232
0996517c
HV		 2233 /* Skip handler-private controls. */
2234 if (ctrl->is_private)
2235 continue;
6e239399
HV		 2236 /* And control classes */
2237 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2238 continue;
34a6b7d0
HV		 2239 /* Filter any unwanted controls */
2240 if (filter && !filter(ctrl))
2241 continue;
0996517c
HV		 2242 ret = handler_new_ref(hdl, ctrl);
2243 if (ret)
2244 break;
2245 }
77e7c4e6 2246 mutex_unlock(add->lock);
0996517c
HV		 2247 return ret;
2248}
2249EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2250
34a6b7d0
HV		 2251bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2252{
2253 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
2254 return true;
3963d4fb
HV		 2255 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
2256 return true;
34a6b7d0
HV		 2257 switch (ctrl->id) {
2258 case V4L2_CID_AUDIO_MUTE:
2259 case V4L2_CID_AUDIO_VOLUME:
2260 case V4L2_CID_AUDIO_BALANCE:
2261 case V4L2_CID_AUDIO_BASS:
2262 case V4L2_CID_AUDIO_TREBLE:
2263 case V4L2_CID_AUDIO_LOUDNESS:
2264 return true;
2265 default:
2266 break;
2267 }
2268 return false;
2269}
2270EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2271
0996517c
HV		 2272/* Cluster controls */
2273void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2274{
5626b8c7 2275 bool has_volatiles = false;
0996517c
HV		 2276 int i;
2277
2278 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2279 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2280 return;
0996517c
HV		 2281
2282 for (i = 0; i < ncontrols; i++) {
2283 if (controls[i]) {
2284 controls[i]->cluster = controls;
2285 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2286 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2287 has_volatiles = true;
0996517c
HV		 2288 }
2289 }
5626b8c7 2290 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2291}
2292EXPORT_SYMBOL(v4l2_ctrl_cluster);
2293
72d877ca
HV		 2294void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2295 u8 manual_val, bool set_volatile)
2296{
2297 struct v4l2_ctrl *master = controls[0];
5626b8c7 2298 u32 flag = 0;
72d877ca
HV		 2299 int i;
2300
2301 v4l2_ctrl_cluster(ncontrols, controls);
2302 WARN_ON(ncontrols <= 1);
82a7c049 2303 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2304 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2305 master->is_auto = true;
5626b8c7 2306 master->has_volatiles = set_volatile;
72d877ca
HV		 2307 master->manual_mode_value = manual_val;
2308 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2309
2310 if (!is_cur_manual(master))
2311 flag = V4L2_CTRL_FLAG_INACTIVE |
2312 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2313
2314 for (i = 1; i < ncontrols; i++)
88365105 2315 if (controls[i])
72d877ca 2316 controls[i]->flags |= flag;
72d877ca
HV		 2317}
2318EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2319
0996517c
HV		 2320/* Activate/deactivate a control. */
2321void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2322{
6e239399
HV		 2323 /* invert since the actual flag is called 'inactive' */
2324 bool inactive = !active;
2325 bool old;
2326
0996517c
HV		 2327 if (ctrl == NULL)
2328 return;
2329
6e239399 2330 if (inactive)
0996517c 2331 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2332 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2333 else
2334 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2335 old = test_and_clear_bit(4, &ctrl->flags);
2336 if (old != inactive)
2337 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2338}
2339EXPORT_SYMBOL(v4l2_ctrl_activate);
2340
2341/* Grab/ungrab a control.
2342 Typically used when streaming starts and you want to grab controls,
2343 preventing the user from changing them.
2344
2345 Just call this and the framework will block any attempts to change
2346 these controls. */
2347void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2348{
6e239399
HV		 2349 bool old;
2350
0996517c
HV		 2351 if (ctrl == NULL)
2352 return;
2353
6e239399 2354 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2355 if (grabbed)
2356 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2357 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2358 else
2359 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2360 old = test_and_clear_bit(1, &ctrl->flags);
2361 if (old != grabbed)
2362 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2363 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2364}
2365EXPORT_SYMBOL(v4l2_ctrl_grab);
2366
2367/* Log the control name and value */
2368static void log_ctrl(const struct v4l2_ctrl *ctrl,
2369 const char *prefix, const char *colon)
2370{
0996517c
HV		 2371 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2372 return;
2373 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2374 return;
2375
7eafbce9 2376 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2377
0176077a
HV		 2378 ctrl->type_ops->log(ctrl);
2379
88365105
HV		 2380 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2381 V4L2_CTRL_FLAG_GRABBED |
2382 V4L2_CTRL_FLAG_VOLATILE)) {
2383 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2384 pr_cont(" inactive");
88365105 2385 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2386 pr_cont(" grabbed");
88365105 2387 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2388 pr_cont(" volatile");
88365105 2389 }
7eafbce9 2390 pr_cont("\n");
0996517c
HV		 2391}
2392
2393/* Log all controls owned by the handler */
2394void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2395 const char *prefix)
2396{
2397 struct v4l2_ctrl *ctrl;
2398 const char *colon = "";
2399 int len;
2400
2401 if (hdl == NULL)
2402 return;
2403 if (prefix == NULL)
2404 prefix = "";
2405 len = strlen(prefix);
2406 if (len && prefix[len - 1] != ' ')
2407 colon = ": ";
77e7c4e6 2408 mutex_lock(hdl->lock);
0996517c
HV		 2409 list_for_each_entry(ctrl, &hdl->ctrls, node)
2410 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2411 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2412 mutex_unlock(hdl->lock);
0996517c
HV		 2413}
2414EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2415
ffa9b9f0
SN		 2416int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2417{
2418 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2419 return 0;
2420}
2421EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2422
0996517c
HV		 2423/* Call s_ctrl for all controls owned by the handler */
2424int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2425{
2426 struct v4l2_ctrl *ctrl;
2427 int ret = 0;
2428
2429 if (hdl == NULL)
2430 return 0;
77e7c4e6 2431 mutex_lock(hdl->lock);
0996517c
HV		 2432 list_for_each_entry(ctrl, &hdl->ctrls, node)
2433 ctrl->done = false;
2434
2435 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2436 struct v4l2_ctrl *master = ctrl->cluster[0];
2437 int i;
2438
2439 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2440 /* Skip button controls and read-only controls. */
2441 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2442 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2443 continue;
2444
2a863793
HV		 2445 for (i = 0; i < master->ncontrols; i++) {
2446 if (master->cluster[i]) {
2447 cur_to_new(master->cluster[i]);
2448 master->cluster[i]->is_new = 1;
71c6c4c9 2449 master->cluster[i]->done = true;
2a863793
HV		 2450 }
2451 }
54c911eb 2452 ret = call_op(master, s_ctrl);
0996517c
HV		 2453 if (ret)
2454 break;
0996517c 2455 }
77e7c4e6 2456 mutex_unlock(hdl->lock);
0996517c
HV		 2457 return ret;
2458}
2459EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2460
d9a25471
HV		 2461/* Implement VIDIOC_QUERY_EXT_CTRL */
2462int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2463{
d9a25471 2464 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2465 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2466 struct v4l2_ctrl_ref *ref;
2467 struct v4l2_ctrl *ctrl;
2468
2469 if (hdl == NULL)
2470 return -EINVAL;
2471
77e7c4e6 2472 mutex_lock(hdl->lock);
0996517c
HV		 2473
2474 /* Try to find it */
2475 ref = find_ref(hdl, id);
2476
d9a25471
HV		 2477 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2478 bool is_compound;
2479 /* Match any control that is not hidden */
2480 unsigned mask = 1;
2481 bool match = false;
2482
2483 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2484 /* Match any hidden control */
2485 match = true;
2486 } else if ((qc->id & next_flags) == next_flags) {
2487 /* Match any control, compound or not */
2488 mask = 0;
2489 }
2490
0996517c
HV		 2491 /* Find the next control with ID > qc->id */
2492
2493 /* Did we reach the end of the control list? */
2494 if (id >= node2id(hdl->ctrl_refs.prev)) {
2495 ref = NULL; /* Yes, so there is no next control */
2496 } else if (ref) {
2497 /* We found a control with the given ID, so just get
d9a25471
HV		 2498 the next valid one in the list. */
2499 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
2500 is_compound =
2501 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2502 if (id < ref->ctrl->id &&
2503 (is_compound & mask) == match)
2504 break;
2505 }
2506 if (&ref->node == &hdl->ctrl_refs)
2507 ref = NULL;
0996517c
HV		 2508 } else {
2509 /* No control with the given ID exists, so start
2510 searching for the next largest ID. We know there
2511 is one, otherwise the first 'if' above would have
2512 been true. */
d9a25471
HV		 2513 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2514 is_compound =
2515 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2516 if (id < ref->ctrl->id &&
2517 (is_compound & mask) == match)
0996517c 2518 break;
d9a25471
HV		 2519 }
2520 if (&ref->node == &hdl->ctrl_refs)
2521 ref = NULL;
0996517c
HV		 2522 }
2523 }
77e7c4e6 2524 mutex_unlock(hdl->lock);
d9a25471 2525
0996517c
HV		 2526 if (!ref)
2527 return -EINVAL;
2528
2529 ctrl = ref->ctrl;
2530 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2531 if (id >= V4L2_CID_PRIVATE_BASE)
2532 qc->id = id;
2533 else
2534 qc->id = ctrl->id;
0996517c 2535 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2536 qc->flags = ctrl->flags;
2537 qc->type = ctrl->type;
2538 if (ctrl->is_ptr)
2539 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2540 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2541 qc->elems = ctrl->elems;
2542 qc->nr_of_dims = ctrl->nr_of_dims;
2543 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2544 qc->minimum = ctrl->minimum;
2545 qc->maximum = ctrl->maximum;
2546 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2547 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2548 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2549 qc->step = 1;
2550 else
2551 qc->step = ctrl->step;
d9a25471
HV		 2552 return 0;
2553}
2554EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2555
2556/* Implement VIDIOC_QUERYCTRL */
2557int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2558{
2559 struct v4l2_query_ext_ctrl qec = { qc->id };
2560 int rc;
2561
2562 rc = v4l2_query_ext_ctrl(hdl, &qec);
2563 if (rc)
2564 return rc;
2565
2566 qc->id = qec.id;
2567 qc->type = qec.type;
2568 qc->flags = qec.flags;
2569 strlcpy(qc->name, qec.name, sizeof(qc->name));
2570 switch (qc->type) {
2571 case V4L2_CTRL_TYPE_INTEGER:
2572 case V4L2_CTRL_TYPE_BOOLEAN:
2573 case V4L2_CTRL_TYPE_MENU:
2574 case V4L2_CTRL_TYPE_INTEGER_MENU:
2575 case V4L2_CTRL_TYPE_STRING:
2576 case V4L2_CTRL_TYPE_BITMASK:
2577 qc->minimum = qec.minimum;
2578 qc->maximum = qec.maximum;
2579 qc->step = qec.step;
2580 qc->default_value = qec.default_value;
2581 break;
2582 default:
2583 qc->minimum = 0;
2584 qc->maximum = 0;
2585 qc->step = 0;
2586 qc->default_value = 0;
2587 break;
2588 }
0996517c
HV		 2589 return 0;
2590}
2591EXPORT_SYMBOL(v4l2_queryctrl);
2592
2593int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2594{
d9a25471 2595 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2596 return -EINVAL;
0996517c
HV		 2597 return v4l2_queryctrl(sd->ctrl_handler, qc);
2598}
2599EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2600
2601/* Implement VIDIOC_QUERYMENU */
2602int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2603{
2604 struct v4l2_ctrl *ctrl;
2605 u32 i = qm->index;
2606
2607 ctrl = v4l2_ctrl_find(hdl, qm->id);
2608 if (!ctrl)
2609 return -EINVAL;
2610
2611 qm->reserved = 0;
2612 /* Sanity checks */
ce580fe5
SA		 2613 switch (ctrl->type) {
2614 case V4L2_CTRL_TYPE_MENU:
2615 if (ctrl->qmenu == NULL)
2616 return -EINVAL;
2617 break;
2618 case V4L2_CTRL_TYPE_INTEGER_MENU:
2619 if (ctrl->qmenu_int == NULL)
2620 return -EINVAL;
2621 break;
2622 default:
2623 return -EINVAL;
2624 }
2625
2626 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2627 return -EINVAL;
ce580fe5 2628
0996517c
HV		 2629 /* Use mask to see if this menu item should be skipped */
2630 if (ctrl->menu_skip_mask & (1 << i))
2631 return -EINVAL;
2632 /* Empty menu items should also be skipped */
ce580fe5
SA		 2633 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2634 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2635 return -EINVAL;
2636 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2637 } else {
2638 qm->value = ctrl->qmenu_int[i];
2639 }
0996517c
HV		 2640 return 0;
2641}
2642EXPORT_SYMBOL(v4l2_querymenu);
2643
2644int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2645{
2646 return v4l2_querymenu(sd->ctrl_handler, qm);
2647}
2648EXPORT_SYMBOL(v4l2_subdev_querymenu);
2649
2650
2651
2652/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2653
2654 It is not a fully atomic operation, just best-effort only. After all, if
2655 multiple controls have to be set through multiple i2c writes (for example)
2656 then some initial writes may succeed while others fail. Thus leaving the
2657 system in an inconsistent state. The question is how much effort you are
2658 willing to spend on trying to make something atomic that really isn't.
2659
2660 From the point of view of an application the main requirement is that
2661 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2662 error should be returned without actually affecting any controls.
2663
2664 If all the values are correct, then it is acceptable to just give up
2665 in case of low-level errors.
2666
2667 It is important though that the application can tell when only a partial
2668 configuration was done. The way we do that is through the error_idx field
2669 of struct v4l2_ext_controls: if that is equal to the count field then no
2670 controls were affected. Otherwise all controls before that index were
2671 successful in performing their 'get' or 'set' operation, the control at
2672 the given index failed, and you don't know what happened with the controls
2673 after the failed one. Since if they were part of a control cluster they
2674 could have been successfully processed (if a cluster member was encountered
2675 at index < error_idx), they could have failed (if a cluster member was at
2676 error_idx), or they may not have been processed yet (if the first cluster
2677 member appeared after error_idx).
2678
2679 It is all fairly theoretical, though. In practice all you can do is to
2680 bail out. If error_idx == count, then it is an application bug. If
2681 error_idx < count then it is only an application bug if the error code was
2682 EBUSY. That usually means that something started streaming just when you
2683 tried to set the controls. In all other cases it is a driver/hardware
2684 problem and all you can do is to retry or bail out.
2685
2686 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2687 never modifies controls the error_idx is just set to whatever control
2688 has an invalid value.
2689 */
2690
2691/* Prepare for the extended g/s/try functions.
2692 Find the controls in the control array and do some basic checks. */
2693static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2694 struct v4l2_ext_controls *cs,
d9a25471
HV		 2695 struct v4l2_ctrl_helper *helpers,
2696 bool get)
0996517c 2697{
eb5b16ef
HV		 2698 struct v4l2_ctrl_helper *h;
2699 bool have_clusters = false;
0996517c
HV		 2700 u32 i;
2701
eb5b16ef 2702 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2703 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2704 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2705 struct v4l2_ctrl *ctrl;
2706 u32 id = c->id & V4L2_CTRL_ID_MASK;
2707
37cd3b73 2708 cs->error_idx = i;
0996517c
HV		 2709
2710 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2711 return -EINVAL;
2712
2713 /* Old-style private controls are not allowed for
2714 extended controls */
2715 if (id >= V4L2_CID_PRIVATE_BASE)
2716 return -EINVAL;
eb5b16ef
HV		 2717 ref = find_ref_lock(hdl, id);
2718 if (ref == NULL)
0996517c 2719 return -EINVAL;
eb5b16ef 2720 ctrl = ref->ctrl;
0996517c
HV		 2721 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2722 return -EINVAL;
2723
eb5b16ef
HV		 2724 if (ctrl->cluster[0]->ncontrols > 1)
2725 have_clusters = true;
2726 if (ctrl->cluster[0] != ctrl)
2727 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2728 if (ctrl->is_ptr && !ctrl->is_string) {
2729 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2730
2731 if (c->size < tot_size) {
2732 if (get) {
2733 c->size = tot_size;
2734 return -ENOSPC;
2735 }
2736 return -EFAULT;
d9a25471 2737 }
302ab7ce 2738 c->size = tot_size;
d9a25471 2739 }
eb5b16ef
HV		 2740 /* Store the ref to the master control of the cluster */
2741 h->mref = ref;
2742 h->ctrl = ctrl;
2743 /* Initially set next to 0, meaning that there is no other
2744 control in this helper array belonging to the same
2745 cluster */
2746 h->next = 0;
0996517c 2747 }
0996517c 2748
eb5b16ef
HV		 2749 /* We are done if there were no controls that belong to a multi-
2750 control cluster. */
2751 if (!have_clusters)
2752 return 0;
0996517c 2753
eb5b16ef
HV		 2754 /* The code below figures out in O(n) time which controls in the list
2755 belong to the same cluster. */
0996517c 2756
eb5b16ef 2757 /* This has to be done with the handler lock taken. */
77e7c4e6 2758 mutex_lock(hdl->lock);
0996517c 2759
eb5b16ef
HV		 2760 /* First zero the helper field in the master control references */
2761 for (i = 0; i < cs->count; i++)
c082266f 2762 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2763 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2764 struct v4l2_ctrl_ref *mref = h->mref;
2765
2766 /* If the mref->helper is set, then it points to an earlier
2767 helper that belongs to the same cluster. */
2768 if (mref->helper) {
2769 /* Set the next field of mref->helper to the current
2770 index: this means that that earlier helper now
2771 points to the next helper in the same cluster. */
2772 mref->helper->next = i;
2773 /* mref should be set only for the first helper in the
2774 cluster, clear the others. */
2775 h->mref = NULL;
2776 }
2777 /* Point the mref helper to the current helper struct. */
2778 mref->helper = h;
0996517c 2779 }
77e7c4e6 2780 mutex_unlock(hdl->lock);
eb5b16ef 2781 return 0;
0996517c
HV		 2782}
2783
2784/* Handles the corner case where cs->count == 0. It checks whether the
2785 specified control class exists. If that class ID is 0, then it checks
2786 whether there are any controls at all. */
2787static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2788{
2789 if (ctrl_class == 0)
2790 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2791 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2792}
2793
2794
2795
2796/* Get extended controls. Allocates the helpers array if needed. */
2797int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2798{
eb5b16ef
HV		 2799 struct v4l2_ctrl_helper helper[4];
2800 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2801 int ret;
ddac5c10 2802 int i, j;
0996517c
HV		 2803
2804 cs->error_idx = cs->count;
2805 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2806
2807 if (hdl == NULL)
2808 return -EINVAL;
2809
2810 if (cs->count == 0)
2811 return class_check(hdl, cs->ctrl_class);
2812
2813 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2814 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2815 GFP_KERNEL);
0996517c
HV		 2816 if (helpers == NULL)
2817 return -ENOMEM;
2818 }
2819
d9a25471 2820 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2821 cs->error_idx = cs->count;
0996517c
HV		 2822
2823 for (i = 0; !ret && i < cs->count; i++)
2824 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2825 ret = -EACCES;
2826
2827 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2828 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2829 struct v4l2_ctrl *ctrl) = cur_to_user;
2830 struct v4l2_ctrl *master;
0996517c 2831
eb5b16ef 2832 if (helpers[i].mref == NULL)
0996517c
HV		 2833 continue;
2834
eb5b16ef 2835 master = helpers[i].mref->ctrl;
0996517c
HV		 2836 cs->error_idx = i;
2837
2838 v4l2_ctrl_lock(master);
ddac5c10
HV		 2839
2840 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2841 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2842 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2843 for (j = 0; j < master->ncontrols; j++)
2844 cur_to_new(master->cluster[j]);
54c911eb 2845 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2846 ctrl_to_user = new_to_user;
ddac5c10
HV		 2847 }
2848 /* If OK, then copy the current (for non-volatile controls)
2849 or the new (for volatile controls) control values to the
2850 caller */
eb5b16ef
HV		 2851 if (!ret) {
2852 u32 idx = i;
2853
2854 do {
2855 ret = ctrl_to_user(cs->controls + idx,
2856 helpers[idx].ctrl);
2857 idx = helpers[idx].next;
2858 } while (!ret && idx);
2859 }
0996517c 2860 v4l2_ctrl_unlock(master);
0996517c
HV		 2861 }
2862
2863 if (cs->count > ARRAY_SIZE(helper))
2864 kfree(helpers);
2865 return ret;
2866}
2867EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2868
2869int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2870{
2871 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2872}
2873EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2874
2875/* Helper function to get a single control */
03d5285b 2876static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2877{
2878 struct v4l2_ctrl *master = ctrl->cluster[0];
2879 int ret = 0;
ddac5c10 2880 int i;
0996517c 2881
d9a25471 2882 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2883 * cur_to_user() calls below would need to be modified not to access
2884 * userspace memory when called from get_ctrl().
2885 */
d9a25471 2886 if (!ctrl->is_int)
03d5285b
LP		 2887 return -EINVAL;
2888
0996517c
HV		 2889 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2890 return -EACCES;
2891
2892 v4l2_ctrl_lock(master);
2893 /* g_volatile_ctrl will update the current control values */
5626b8c7 2894 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2895 for (i = 0; i < master->ncontrols; i++)
2896 cur_to_new(master->cluster[i]);
54c911eb 2897 ret = call_op(master, g_volatile_ctrl);
03d5285b 2898 new_to_user(c, ctrl);
ddac5c10 2899 } else {
03d5285b 2900 cur_to_user(c, ctrl);
ddac5c10 2901 }
0996517c
HV		 2902 v4l2_ctrl_unlock(master);
2903 return ret;
2904}
2905
2906int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2907{
2908 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2909 struct v4l2_ext_control c;
2910 int ret;
0996517c 2911
d9a25471 2912 if (ctrl == NULL || !ctrl->is_int)
0996517c 2913 return -EINVAL;
03d5285b
LP		 2914 ret = get_ctrl(ctrl, &c);
2915 control->value = c.value;
2916 return ret;
0996517c
HV		 2917}
2918EXPORT_SYMBOL(v4l2_g_ctrl);
2919
2920int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2921{
2922 return v4l2_g_ctrl(sd->ctrl_handler, control);
2923}
2924EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2925
2926s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2927{
03d5285b 2928 struct v4l2_ext_control c;
0996517c
HV		 2929
2930 /* It's a driver bug if this happens. */
d9a25471 2931 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2932 c.value = 0;
2933 get_ctrl(ctrl, &c);
2934 return c.value;
0996517c
HV		 2935}
2936EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2937
03d5285b
LP		 2938s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2939{
2940 struct v4l2_ext_control c;
2941
2942 /* It's a driver bug if this happens. */
998e7659 2943 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
03d5285b
LP		 2944 c.value = 0;
2945 get_ctrl(ctrl, &c);
2946 return c.value;
2947}
2948EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2949
0996517c
HV		 2950
2951/* Core function that calls try/s_ctrl and ensures that the new value is
2952 copied to the current value on a set.
2953 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2954static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2955 bool set, u32 ch_flags)
0996517c 2956{
72d877ca 2957 bool update_flag;
eb5b16ef 2958 int ret;
0996517c
HV		 2959 int i;
2960
2961 /* Go through the cluster and either validate the new value or
2962 (if no new value was set), copy the current value to the new
2963 value, ensuring a consistent view for the control ops when
2964 called. */
eb5b16ef 2965 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2966 struct v4l2_ctrl *ctrl = master->cluster[i];
2967
2968 if (ctrl == NULL)
2969 continue;
2970
eb5b16ef
HV		 2971 if (!ctrl->is_new) {
2972 cur_to_new(ctrl);
0996517c
HV		 2973 continue;
2974 }
eb5b16ef
HV		 2975 /* Check again: it may have changed since the
2976 previous check in try_or_set_ext_ctrls(). */
2977 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2978 return -EBUSY;
0996517c
HV		 2979 }
2980
eb5b16ef 2981 ret = call_op(master, try_ctrl);
0996517c
HV		 2982
2983 /* Don't set if there is no change */
72d877ca
HV		 2984 if (ret || !set || !cluster_changed(master))
2985 return ret;
2986 ret = call_op(master, s_ctrl);
72d877ca
HV		 2987 if (ret)
2988 return ret;
2989
eb5b16ef 2990 /* If OK, then make the new values permanent. */
72d877ca
HV		 2991 update_flag = is_cur_manual(master) != is_new_manual(master);
2992 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 2993 new_to_cur(fh, master->cluster[i], ch_flags |
2994 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 2995 return 0;
0996517c
HV		 2996}
2997
e6402585
HV		 2998/* Validate controls. */
2999static int validate_ctrls(struct v4l2_ext_controls *cs,
3000 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3001{
e6402585 3002 unsigned i;
0996517c
HV		 3003 int ret = 0;
3004
eb5b16ef 3005 cs->error_idx = cs->count;
0996517c
HV		 3006 for (i = 0; i < cs->count; i++) {
3007 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3008 union v4l2_ctrl_ptr p_new;
0996517c 3009
e6402585 3010 cs->error_idx = i;
0996517c
HV		 3011
3012 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3013 return -EACCES;
3014 /* This test is also done in try_set_control_cluster() which
3015 is called in atomic context, so that has the final say,
3016 but it makes sense to do an up-front check as well. Once
3017 an error occurs in try_set_control_cluster() some other
3018 controls may have been set already and we want to do a
3019 best-effort to avoid that. */
3020 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3021 return -EBUSY;
7a7f1ab3
HV		 3022 /*
3023 * Skip validation for now if the payload needs to be copied
3024 * from userspace into kernelspace. We'll validate those later.
3025 */
3026 if (ctrl->is_ptr)
3027 continue;
3028 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3029 p_new.p_s64 = &cs->controls[i].value64;
3030 else
3031 p_new.p_s32 = &cs->controls[i].value;
3032 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3033 if (ret)
3034 return ret;
0996517c 3035 }
e6402585
HV		 3036 return 0;
3037}
3038
5626b8c7
HV		 3039/* Obtain the current volatile values of an autocluster and mark them
3040 as new. */
3041static void update_from_auto_cluster(struct v4l2_ctrl *master)
3042{
3043 int i;
3044
3045 for (i = 0; i < master->ncontrols; i++)
3046 cur_to_new(master->cluster[i]);
3047 if (!call_op(master, g_volatile_ctrl))
3048 for (i = 1; i < master->ncontrols; i++)
3049 if (master->cluster[i])
3050 master->cluster[i]->is_new = 1;
3051}
3052
e6402585
HV		 3053/* Try or try-and-set controls */
3054static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3055 struct v4l2_ext_controls *cs,
3056 bool set)
3057{
3058 struct v4l2_ctrl_helper helper[4];
3059 struct v4l2_ctrl_helper *helpers = helper;
3060 unsigned i, j;
3061 int ret;
3062
3063 cs->error_idx = cs->count;
3064 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
3065
3066 if (hdl == NULL)
3067 return -EINVAL;
3068
3069 if (cs->count == 0)
3070 return class_check(hdl, cs->ctrl_class);
0996517c 3071
e6402585 3072 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 3073 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
3074 GFP_KERNEL);
e6402585
HV		 3075 if (!helpers)
3076 return -ENOMEM;
3077 }
d9a25471 3078 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3079 if (!ret)
3080 ret = validate_ctrls(cs, helpers, set);
3081 if (ret && set)
3082 cs->error_idx = cs->count;
0996517c 3083 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3084 struct v4l2_ctrl *master;
3085 u32 idx = i;
0996517c 3086
eb5b16ef 3087 if (helpers[i].mref == NULL)
0996517c
HV		 3088 continue;
3089
37cd3b73 3090 cs->error_idx = i;
eb5b16ef
HV		 3091 master = helpers[i].mref->ctrl;
3092 v4l2_ctrl_lock(master);
0996517c 3093
2a863793 3094 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3095 for (j = 0; j < master->ncontrols; j++)
3096 if (master->cluster[j])
2a863793 3097 master->cluster[j]->is_new = 0;
0996517c 3098
5626b8c7
HV		 3099 /* For volatile autoclusters that are currently in auto mode
3100 we need to discover if it will be set to manual mode.
3101 If so, then we have to copy the current volatile values
3102 first since those will become the new manual values (which
3103 may be overwritten by explicit new values from this set
3104 of controls). */
3105 if (master->is_auto && master->has_volatiles &&
3106 !is_cur_manual(master)) {
3107 /* Pick an initial non-manual value */
3108 s32 new_auto_val = master->manual_mode_value + 1;
3109 u32 tmp_idx = idx;
3110
3111 do {
3112 /* Check if the auto control is part of the
3113 list, and remember the new value. */
3114 if (helpers[tmp_idx].ctrl == master)
3115 new_auto_val = cs->controls[tmp_idx].value;
3116 tmp_idx = helpers[tmp_idx].next;
3117 } while (tmp_idx);
3118 /* If the new value == the manual value, then copy
3119 the current volatile values. */
3120 if (new_auto_val == master->manual_mode_value)
3121 update_from_auto_cluster(master);
3122 }
3123
0996517c 3124 /* Copy the new caller-supplied control values.
2a863793 3125 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3126 do {
7a7f1ab3
HV		 3127 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3128
3129 ret = user_to_new(cs->controls + idx, ctrl);
3130 if (!ret && ctrl->is_ptr)
3131 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3132 idx = helpers[idx].next;
3133 } while (!ret && idx);
0996517c
HV		 3134
3135 if (!ret)
2ccbe779 3136 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3137
3138 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3139 if (!ret) {
3140 idx = i;
3141 do {
adf41b9b 3142 ret = new_to_user(cs->controls + idx,
e6402585 3143 helpers[idx].ctrl);
eb5b16ef
HV		 3144 idx = helpers[idx].next;
3145 } while (!ret && idx);
3146 }
3147 v4l2_ctrl_unlock(master);
0996517c 3148 }
0996517c 3149
0996517c
HV		 3150 if (cs->count > ARRAY_SIZE(helper))
3151 kfree(helpers);
3152 return ret;
3153}
3154
3155int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3156{
ab892bac 3157 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3158}
3159EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3160
ab892bac
HV		 3161int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3162 struct v4l2_ext_controls *cs)
0996517c 3163{
ab892bac 3164 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3165}
3166EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3167
3168int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3169{
ab892bac 3170 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 3171}
3172EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
3173
3174int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3175{
ab892bac 3176 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 3177}
3178EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
3179
3180/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3181static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3182{
3183 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3184 int ret;
0996517c
HV		 3185 int i;
3186
2a863793 3187 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3188 for (i = 0; i < master->ncontrols; i++)
3189 if (master->cluster[i])
2a863793 3190 master->cluster[i]->is_new = 0;
0996517c 3191
7a7f1ab3
HV		 3192 ret = validate_new(ctrl, ctrl->p_new);
3193 if (ret)
3194 return ret;
5d0360a4 3195
5626b8c7
HV		 3196 /* For autoclusters with volatiles that are switched from auto to
3197 manual mode we have to update the current volatile values since
3198 those will become the initial manual values after such a switch. */
3199 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3200 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3201 update_from_auto_cluster(master);
03d5285b 3202
5d0360a4 3203 ctrl->is_new = 1;
2ccbe779
SN		 3204 return try_or_set_cluster(fh, master, true, ch_flags);
3205}
03d5285b 3206
2ccbe779
SN		 3207/* Helper function for VIDIOC_S_CTRL compatibility */
3208static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3209 struct v4l2_ext_control *c)
3210{
7a7f1ab3 3211 int ret;
2ccbe779 3212
7a7f1ab3
HV		 3213 v4l2_ctrl_lock(ctrl);
3214 user_to_new(c, ctrl);
3215 ret = set_ctrl(fh, ctrl, 0);
3216 if (!ret)
3217 cur_to_user(c, ctrl);
3218 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3219 return ret;
3220}
3221
ab892bac
HV		 3222int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3223 struct v4l2_control *control)
0996517c
HV		 3224{
3225 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3226 struct v4l2_ext_control c = { control->id };
03d5285b 3227 int ret;
0996517c 3228
d9a25471 3229 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3230 return -EINVAL;
3231
7ebbc39f
HV		 3232 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3233 return -EACCES;
3234
03d5285b 3235 c.value = control->value;
2ccbe779 3236 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3237 control->value = c.value;
3238 return ret;
0996517c
HV		 3239}
3240EXPORT_SYMBOL(v4l2_s_ctrl);
3241
3242int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3243{
ab892bac 3244 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3245}
3246EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3247
0c4348ad 3248int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3249{
0c4348ad 3250 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3251
0996517c 3252 /* It's a driver bug if this happens. */
d9a25471 3253 WARN_ON(!ctrl->is_int);
5d0360a4 3254 ctrl->val = val;
7a7f1ab3 3255 return set_ctrl(NULL, ctrl, 0);
0996517c 3256}
0c4348ad 3257EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3258
0c4348ad 3259int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3260{
0c4348ad 3261 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3262
3263 /* It's a driver bug if this happens. */
998e7659 3264 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3265 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3266 return set_ctrl(NULL, ctrl, 0);
03d5285b 3267}
0c4348ad 3268EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3269
5d0360a4
HV		 3270int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3271{
3272 lockdep_assert_held(ctrl->handler->lock);
3273
3274 /* It's a driver bug if this happens. */
3275 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3276 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3277 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3278}
3279EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3280
8ac7a949
HV		 3281void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3282{
3283 if (ctrl == NULL)
3284 return;
3285 if (notify == NULL) {
3286 ctrl->call_notify = 0;
3287 return;
3288 }
3289 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3290 return;
3291 ctrl->handler->notify = notify;
3292 ctrl->handler->notify_priv = priv;
3293 ctrl->call_notify = 1;
3294}
3295EXPORT_SYMBOL(v4l2_ctrl_notify);
3296
5a573925 3297int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3298 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3299{
7a7f1ab3 3300 bool changed;
302ab7ce 3301 int ret;
2ccbe779 3302
5a573925
SA		 3303 lockdep_assert_held(ctrl->handler->lock);
3304
2ccbe779
SN		 3305 switch (ctrl->type) {
3306 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3307 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3308 case V4L2_CTRL_TYPE_BOOLEAN:
3309 case V4L2_CTRL_TYPE_MENU:
3310 case V4L2_CTRL_TYPE_INTEGER_MENU:
3311 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3312 case V4L2_CTRL_TYPE_U8:
3313 case V4L2_CTRL_TYPE_U16:
811c5081 3314 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3315 if (ctrl->is_array)
3316 return -EINVAL;
3317 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3318 if (ret)
3319 return ret;
3320 break;
3321 default:
3322 return -EINVAL;
3323 }
2ccbe779
SN		 3324 ctrl->minimum = min;
3325 ctrl->maximum = max;
3326 ctrl->step = step;
3327 ctrl->default_value = def;
7a7f1ab3
HV		 3328 cur_to_new(ctrl);
3329 if (validate_new(ctrl, ctrl->p_new)) {
3330 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3331 *ctrl->p_new.p_s64 = def;
3332 else
3333 *ctrl->p_new.p_s32 = def;
3334 }
3335
3336 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3337 changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
3338 else
3339 changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3340 if (changed)
3341 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3342 else
3343 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3344 return ret;
3345}
5a573925 3346EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3347
6e6d76cd 3348static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3349{
3e366149
HG		 3350 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3351
3352 if (ctrl == NULL)
3353 return -EINVAL;
3354
6e239399 3355 v4l2_ctrl_lock(ctrl);
77068d36 3356 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3357 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3358 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3359 struct v4l2_event ev;
c12fcfd6 3360 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3361
c12fcfd6
HV		 3362 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3363 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3364 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3365 /* Mark the queue as active, allowing this initial
3366 event to be accepted. */
3367 sev->elems = elems;
77068d36 3368 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3369 }
3370 v4l2_ctrl_unlock(ctrl);
3e366149 3371 return 0;
6e239399 3372}
6e239399 3373
3e366149 3374static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3375{
3e366149
HG		 3376 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3377
6e239399 3378 v4l2_ctrl_lock(ctrl);
77068d36 3379 list_del(&sev->node);
6e239399
HV		 3380 v4l2_ctrl_unlock(ctrl);
3381}
3e366149
HG		 3382
3383void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3384{
3385 u32 old_changes = old->u.ctrl.changes;
3386
3387 old->u.ctrl = new->u.ctrl;
3388 old->u.ctrl.changes |= old_changes;
3389}
3390EXPORT_SYMBOL(v4l2_ctrl_replace);
3391
3392void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3393{
3394 new->u.ctrl.changes |= old->u.ctrl.changes;
3395}
3396EXPORT_SYMBOL(v4l2_ctrl_merge);
3397
3398const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3399 .add = v4l2_ctrl_add_event,
3400 .del = v4l2_ctrl_del_event,
3401 .replace = v4l2_ctrl_replace,
3402 .merge = v4l2_ctrl_merge,
3403};
3404EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3405
3406int v4l2_ctrl_log_status(struct file *file, void *fh)
3407{
3408 struct video_device *vfd = video_devdata(file);
3409 struct v4l2_fh *vfh = file->private_data;
3410
3411 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3412 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3413 vfd->v4l2_dev->name);
3414 return 0;
3415}
3416EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3417
3418int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3419 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3420{
3421 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3422 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3423 return -EINVAL;
3424}
3425EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3426
22fa4279
SN		 3427int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3428 struct v4l2_event_subscription *sub)
3429{
3430 if (!sd->ctrl_handler)
3431 return -EINVAL;
3432 return v4l2_ctrl_subscribe_event(fh, sub);
3433}
3434EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3435
a26243b0
HV		 3436unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3437{
3438 struct v4l2_fh *fh = file->private_data;
3439
3440 if (v4l2_event_pending(fh))
3441 return POLLPRI;
3442 poll_wait(file, &fh->wait, wait);
3443 return 0;
3444}
3445EXPORT_SYMBOL(v4l2_ctrl_poll);
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