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[media] cec-gpio: don't generate spurious HPD events
[mirror_ubuntu-focal-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>
758d90e1 22#include <linux/mm.h>
2b80163c 23#include <linux/slab.h>
35a24636 24#include <linux/export.h>
0996517c
HV		 25#include <media/v4l2-ioctl.h>
26#include <media/v4l2-device.h>
27#include <media/v4l2-ctrls.h>
6e239399 28#include <media/v4l2-event.h>
0996517c
HV		 29#include <media/v4l2-dev.h>
30
ddac5c10
HV		 31#define has_op(master, op) \
32 (master->ops && master->ops->op)
54c911eb 33#define call_op(master, op) \
ddac5c10 34 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 35
0996517c 36/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 37struct v4l2_ctrl_helper {
38 /* Pointer to the control reference of the master control */
39 struct v4l2_ctrl_ref *mref;
0996517c
HV		 40 /* The control corresponding to the v4l2_ext_control ID field. */
41 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 42 /* v4l2_ext_control index of the next control belonging to the
43 same cluster, or 0 if there isn't any. */
44 u32 next;
0996517c
HV		 45};
46
72d877ca 47/* Small helper function to determine if the autocluster is set to manual
88365105 48 mode. */
72d877ca
HV		 49static bool is_cur_manual(const struct v4l2_ctrl *master)
50{
51 return master->is_auto && master->cur.val == master->manual_mode_value;
52}
53
54/* Same as above, but this checks the against the new value instead of the
55 current value. */
56static bool is_new_manual(const struct v4l2_ctrl *master)
57{
58 return master->is_auto && master->val == master->manual_mode_value;
59}
60
0996517c
HV		 61/* Returns NULL or a character pointer array containing the menu for
62 the given control ID. The pointer array ends with a NULL pointer.
63 An empty string signifies a menu entry that is invalid. This allows
64 drivers to disable certain options if it is not supported. */
513521ea 65const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 66{
513521ea 67 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 68 "44.1 kHz",
69 "48 kHz",
70 "32 kHz",
71 NULL
72 };
513521ea 73 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 74 "MPEG-1/2 Layer I",
75 "MPEG-1/2 Layer II",
76 "MPEG-1/2 Layer III",
77 "MPEG-2/4 AAC",
78 "AC-3",
79 NULL
80 };
513521ea 81 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 82 "32 kbps",
83 "64 kbps",
84 "96 kbps",
85 "128 kbps",
86 "160 kbps",
87 "192 kbps",
88 "224 kbps",
89 "256 kbps",
90 "288 kbps",
91 "320 kbps",
92 "352 kbps",
93 "384 kbps",
94 "416 kbps",
95 "448 kbps",
96 NULL
97 };
513521ea 98 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 99 "32 kbps",
100 "48 kbps",
101 "56 kbps",
102 "64 kbps",
103 "80 kbps",
104 "96 kbps",
105 "112 kbps",
106 "128 kbps",
107 "160 kbps",
108 "192 kbps",
109 "224 kbps",
110 "256 kbps",
111 "320 kbps",
112 "384 kbps",
113 NULL
114 };
513521ea 115 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 116 "32 kbps",
117 "40 kbps",
118 "48 kbps",
119 "56 kbps",
120 "64 kbps",
121 "80 kbps",
122 "96 kbps",
123 "112 kbps",
124 "128 kbps",
125 "160 kbps",
126 "192 kbps",
127 "224 kbps",
128 "256 kbps",
129 "320 kbps",
130 NULL
131 };
513521ea 132 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 133 "32 kbps",
134 "40 kbps",
135 "48 kbps",
136 "56 kbps",
137 "64 kbps",
138 "80 kbps",
139 "96 kbps",
140 "112 kbps",
141 "128 kbps",
142 "160 kbps",
143 "192 kbps",
144 "224 kbps",
145 "256 kbps",
146 "320 kbps",
147 "384 kbps",
148 "448 kbps",
149 "512 kbps",
150 "576 kbps",
151 "640 kbps",
152 NULL
153 };
513521ea 154 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 155 "Stereo",
156 "Joint Stereo",
157 "Dual",
158 "Mono",
159 NULL
160 };
513521ea 161 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 162 "Bound 4",
163 "Bound 8",
164 "Bound 12",
165 "Bound 16",
166 NULL
167 };
513521ea 168 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 169 "No Emphasis",
170 "50/15 us",
171 "CCITT J17",
172 NULL
173 };
513521ea 174 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 175 "No CRC",
176 "16-bit CRC",
177 NULL
178 };
24c19a21
HV		 179 static const char * const mpeg_audio_dec_playback[] = {
180 "Auto",
181 "Stereo",
182 "Left",
183 "Right",
184 "Mono",
185 "Swapped Stereo",
186 NULL
187 };
513521ea 188 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 189 "MPEG-1",
190 "MPEG-2",
191 "MPEG-4 AVC",
192 NULL
193 };
513521ea 194 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 195 "1x1",
196 "4x3",
197 "16x9",
198 "2.21x1",
199 NULL
200 };
513521ea 201 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 202 "Variable Bitrate",
203 "Constant Bitrate",
204 NULL
205 };
513521ea 206 static const char * const mpeg_stream_type[] = {
0996517c
HV		 207 "MPEG-2 Program Stream",
208 "MPEG-2 Transport Stream",
209 "MPEG-1 System Stream",
210 "MPEG-2 DVD-compatible Stream",
211 "MPEG-1 VCD-compatible Stream",
212 "MPEG-2 SVCD-compatible Stream",
213 NULL
214 };
513521ea 215 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 216 "No VBI",
064f5096 217 "Private Packet, IVTV Format",
0996517c
HV		 218 NULL
219 };
513521ea 220 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 221 "Disabled",
222 "50 Hz",
223 "60 Hz",
d26a6635 224 "Auto",
0996517c
HV		 225 NULL
226 };
513521ea 227 static const char * const camera_exposure_auto[] = {
0996517c
HV		 228 "Auto Mode",
229 "Manual Mode",
230 "Shutter Priority Mode",
231 "Aperture Priority Mode",
232 NULL
233 };
cf072139
SN		 234 static const char * const camera_exposure_metering[] = {
235 "Average",
236 "Center Weighted",
237 "Spot",
fc39f46b 238 "Matrix",
cf072139
SN		 239 NULL
240 };
2272ab65
SN		 241 static const char * const camera_auto_focus_range[] = {
242 "Auto",
243 "Normal",
244 "Macro",
245 "Infinity",
246 NULL
247 };
513521ea 248 static const char * const colorfx[] = {
0996517c
HV		 249 "None",
250 "Black & White",
251 "Sepia",
252 "Negative",
253 "Emboss",
254 "Sketch",
064f5096
KD		 255 "Sky Blue",
256 "Grass Green",
257 "Skin Whiten",
0996517c 258 "Vivid",
6491d1ad
SN		 259 "Aqua",
260 "Art Freeze",
261 "Silhouette",
262 "Solarization",
263 "Antique",
264 "Set Cb/Cr",
0996517c
HV		 265 NULL
266 };
e40a0573
SN		 267 static const char * const auto_n_preset_white_balance[] = {
268 "Manual",
269 "Auto",
270 "Incandescent",
271 "Fluorescent",
272 "Fluorescent H",
273 "Horizon",
274 "Daylight",
275 "Flash",
276 "Cloudy",
277 "Shade",
278 NULL,
279 };
7f84ad8b
SN		 280 static const char * const camera_iso_sensitivity_auto[] = {
281 "Manual",
282 "Auto",
283 NULL
284 };
0bf6b7dc
SN		 285 static const char * const scene_mode[] = {
286 "None",
287 "Backlight",
288 "Beach/Snow",
289 "Candle Light",
290 "Dusk/Dawn",
291 "Fall Colors",
292 "Fireworks",
293 "Landscape",
294 "Night",
295 "Party/Indoor",
296 "Portrait",
297 "Sports",
298 "Sunset",
299 "Text",
300 NULL
301 };
aec330a8
AS		 302 static const char * const tune_emphasis[] = {
303 "None",
f769c260
HV		 304 "50 Microseconds",
305 "75 Microseconds",
0996517c
HV		 306 NULL,
307 };
064f5096
KD		 308 static const char * const header_mode[] = {
309 "Separate Buffer",
310 "Joined With 1st Frame",
311 NULL,
312 };
313 static const char * const multi_slice[] = {
314 "Single",
315 "Max Macroblocks",
316 "Max Bytes",
317 NULL,
318 };
319 static const char * const entropy_mode[] = {
320 "CAVLC",
321 "CABAC",
322 NULL,
323 };
324 static const char * const mpeg_h264_level[] = {
325 "1",
326 "1b",
327 "1.1",
328 "1.2",
329 "1.3",
330 "2",
331 "2.1",
332 "2.2",
333 "3",
334 "3.1",
335 "3.2",
336 "4",
337 "4.1",
338 "4.2",
339 "5",
340 "5.1",
341 NULL,
342 };
343 static const char * const h264_loop_filter[] = {
344 "Enabled",
345 "Disabled",
346 "Disabled at Slice Boundary",
347 NULL,
348 };
349 static const char * const h264_profile[] = {
350 "Baseline",
351 "Constrained Baseline",
352 "Main",
353 "Extended",
354 "High",
355 "High 10",
356 "High 422",
357 "High 444 Predictive",
358 "High 10 Intra",
359 "High 422 Intra",
360 "High 444 Intra",
361 "CAVLC 444 Intra",
362 "Scalable Baseline",
363 "Scalable High",
364 "Scalable High Intra",
15d6e91a 365 "Stereo High",
064f5096
KD		 366 "Multiview High",
367 NULL,
368 };
369 static const char * const vui_sar_idc[] = {
370 "Unspecified",
371 "1:1",
372 "12:11",
373 "10:11",
374 "16:11",
375 "40:33",
376 "24:11",
377 "20:11",
378 "32:11",
379 "80:33",
380 "18:11",
381 "15:11",
382 "64:33",
383 "160:99",
384 "4:3",
385 "3:2",
386 "2:1",
387 "Extended SAR",
388 NULL,
389 };
2e81dde9
AK		 390 static const char * const h264_fp_arrangement_type[] = {
391 "Checkerboard",
392 "Column",
393 "Row",
394 "Side by Side",
395 "Top Bottom",
396 "Temporal",
397 NULL,
398 };
399 static const char * const h264_fmo_map_type[] = {
400 "Interleaved Slices",
401 "Scattered Slices",
402 "Foreground with Leftover",
403 "Box Out",
404 "Raster Scan",
405 "Wipe Scan",
406 "Explicit",
407 NULL,
408 };
064f5096
KD		 409 static const char * const mpeg_mpeg4_level[] = {
410 "0",
411 "0b",
412 "1",
413 "2",
414 "3",
415 "3b",
416 "4",
417 "5",
418 NULL,
419 };
420 static const char * const mpeg4_profile[] = {
421 "Simple",
f769c260 422 "Advanced Simple",
064f5096
KD		 423 "Core",
424 "Simple Scalable",
39c1cb2b 425 "Advanced Coding Efficiency",
064f5096
KD		 426 NULL,
427 };
428
bc9028e1
AK		 429 static const char * const vpx_golden_frame_sel[] = {
430 "Use Previous Frame",
431 "Use Previous Specific Frame",
432 NULL,
433 };
434
0b159acd
SA		 435 static const char * const flash_led_mode[] = {
436 "Off",
437 "Flash",
438 "Torch",
439 NULL,
440 };
441 static const char * const flash_strobe_source[] = {
442 "Software",
443 "External",
444 NULL,
445 };
0996517c 446
c7361ae1
SN		 447 static const char * const jpeg_chroma_subsampling[] = {
448 "4:4:4",
449 "4:2:2",
450 "4:2:0",
451 "4:1:1",
452 "4:1:0",
453 "Gray",
454 NULL,
455 };
977ebec7
HV		 456 static const char * const dv_tx_mode[] = {
457 "DVI-D",
458 "HDMI",
459 NULL,
460 };
461 static const char * const dv_rgb_range[] = {
462 "Automatic",
f098268b
HV		 463 "RGB Limited Range (16-235)",
464 "RGB Full Range (0-255)",
977ebec7
HV		 465 NULL,
466 };
45cc29af
HV		 467 static const char * const dv_it_content_type[] = {
468 "Graphics",
469 "Photo",
470 "Cinema",
471 "Game",
472 "No IT Content",
473 NULL,
474 };
a77b4fc0
HV		 475 static const char * const detect_md_mode[] = {
476 "Disabled",
477 "Global",
478 "Threshold Grid",
479 "Region Grid",
480 NULL,
481 };
977ebec7 482
c7361ae1 483
0996517c
HV		 484 switch (id) {
485 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
486 return mpeg_audio_sampling_freq;
487 case V4L2_CID_MPEG_AUDIO_ENCODING:
488 return mpeg_audio_encoding;
489 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
490 return mpeg_audio_l1_bitrate;
491 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
492 return mpeg_audio_l2_bitrate;
493 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
494 return mpeg_audio_l3_bitrate;
495 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
496 return mpeg_audio_ac3_bitrate;
497 case V4L2_CID_MPEG_AUDIO_MODE:
498 return mpeg_audio_mode;
499 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
500 return mpeg_audio_mode_extension;
501 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
502 return mpeg_audio_emphasis;
503 case V4L2_CID_MPEG_AUDIO_CRC:
504 return mpeg_audio_crc;
24c19a21
HV		 505 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
506 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
507 return mpeg_audio_dec_playback;
0996517c
HV		 508 case V4L2_CID_MPEG_VIDEO_ENCODING:
509 return mpeg_video_encoding;
510 case V4L2_CID_MPEG_VIDEO_ASPECT:
511 return mpeg_video_aspect;
512 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
513 return mpeg_video_bitrate_mode;
514 case V4L2_CID_MPEG_STREAM_TYPE:
515 return mpeg_stream_type;
516 case V4L2_CID_MPEG_STREAM_VBI_FMT:
517 return mpeg_stream_vbi_fmt;
518 case V4L2_CID_POWER_LINE_FREQUENCY:
519 return camera_power_line_frequency;
520 case V4L2_CID_EXPOSURE_AUTO:
521 return camera_exposure_auto;
cf072139
SN		 522 case V4L2_CID_EXPOSURE_METERING:
523 return camera_exposure_metering;
2272ab65
SN		 524 case V4L2_CID_AUTO_FOCUS_RANGE:
525 return camera_auto_focus_range;
0996517c
HV		 526 case V4L2_CID_COLORFX:
527 return colorfx;
e40a0573
SN		 528 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
529 return auto_n_preset_white_balance;
7f84ad8b
SN		 530 case V4L2_CID_ISO_SENSITIVITY_AUTO:
531 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 532 case V4L2_CID_SCENE_MODE:
533 return scene_mode;
0996517c 534 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 535 return tune_emphasis;
536 case V4L2_CID_TUNE_DEEMPHASIS:
537 return tune_emphasis;
0b159acd
SA		 538 case V4L2_CID_FLASH_LED_MODE:
539 return flash_led_mode;
540 case V4L2_CID_FLASH_STROBE_SOURCE:
541 return flash_strobe_source;
064f5096
KD		 542 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
543 return header_mode;
544 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
545 return multi_slice;
546 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
547 return entropy_mode;
548 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
549 return mpeg_h264_level;
550 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
551 return h264_loop_filter;
552 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
553 return h264_profile;
554 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
555 return vui_sar_idc;
2e81dde9
AK		 556 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
557 return h264_fp_arrangement_type;
558 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
559 return h264_fmo_map_type;
064f5096
KD		 560 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
561 return mpeg_mpeg4_level;
562 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
563 return mpeg4_profile;
bc9028e1
AK		 564 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
565 return vpx_golden_frame_sel;
c7361ae1
SN		 566 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
567 return jpeg_chroma_subsampling;
977ebec7
HV		 568 case V4L2_CID_DV_TX_MODE:
569 return dv_tx_mode;
570 case V4L2_CID_DV_TX_RGB_RANGE:
571 case V4L2_CID_DV_RX_RGB_RANGE:
572 return dv_rgb_range;
45cc29af
HV		 573 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
574 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
575 return dv_it_content_type;
a77b4fc0
HV		 576 case V4L2_CID_DETECT_MD_MODE:
577 return detect_md_mode;
c7361ae1 578
0996517c
HV		 579 default:
580 return NULL;
581 }
582}
583EXPORT_SYMBOL(v4l2_ctrl_get_menu);
584
bc9028e1 585#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 586/*
587 * Returns NULL or an s64 type array containing the menu for given
588 * control ID. The total number of the menu items is returned in @len.
589 */
4eed9b33 590const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 591{
4eed9b33 592 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 593 1, 2, 4, 8,
594 };
595
4eed9b33 596 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 597 1, 2, 3,
598 };
599
d1e9b7c1 600 switch (id) {
bc9028e1
AK		 601 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
602 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
603 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
604 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 605 default:
606 *len = 0;
607 return NULL;
2028c71d 608 }
d1e9b7c1
SN		 609}
610EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
611
0996517c
HV		 612/* Return the control name. */
613const char *v4l2_ctrl_get_name(u32 id)
614{
615 switch (id) {
616 /* USER controls */
59253f29 617 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 618 case V4L2_CID_USER_CLASS: return "User Controls";
619 case V4L2_CID_BRIGHTNESS: return "Brightness";
620 case V4L2_CID_CONTRAST: return "Contrast";
621 case V4L2_CID_SATURATION: return "Saturation";
622 case V4L2_CID_HUE: return "Hue";
623 case V4L2_CID_AUDIO_VOLUME: return "Volume";
624 case V4L2_CID_AUDIO_BALANCE: return "Balance";
625 case V4L2_CID_AUDIO_BASS: return "Bass";
626 case V4L2_CID_AUDIO_TREBLE: return "Treble";
627 case V4L2_CID_AUDIO_MUTE: return "Mute";
628 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 629 case V4L2_CID_BLACK_LEVEL: return "Black Level";
630 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
631 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
632 case V4L2_CID_RED_BALANCE: return "Red Balance";
633 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
634 case V4L2_CID_GAMMA: return "Gamma";
635 case V4L2_CID_EXPOSURE: return "Exposure";
636 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
637 case V4L2_CID_GAIN: return "Gain";
638 case V4L2_CID_HFLIP: return "Horizontal Flip";
639 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 640 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
641 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
642 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
643 case V4L2_CID_SHARPNESS: return "Sharpness";
644 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
645 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 646 case V4L2_CID_COLOR_KILLER: return "Color Killer";
647 case V4L2_CID_COLORFX: return "Color Effects";
648 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
649 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
650 case V4L2_CID_ROTATE: return "Rotate";
651 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 652 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 653 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
654 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 655 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
656 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 657 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 658 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 659
bc9028e1
AK		 660 /* Codec controls */
661 /* The MPEG controls are applicable to all codec controls
662 * and the 'MPEG' part of the define is historical */
6c8d6111 663 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 664 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 665 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
666 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
667 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
668 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
669 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 670 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
671 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
672 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 673 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 674 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
675 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
676 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
677 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
678 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 679 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 680 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
681 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
682 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
683 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
684 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 685 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
686 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 687 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
688 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
689 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
690 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
691 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
692 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
693 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
694 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
695 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 696 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 697 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 698 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 699 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
700 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 701 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 702 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
703 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
704 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 705 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 706 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 707 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
708 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 709 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
710 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
711 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 712 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
713 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 714 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
715 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
716 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
717 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 718 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
719 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 720 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
721 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
722 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
723 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
724 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
725 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
726 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
727 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
728 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 729 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
730 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
731 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
732 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
733 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
734 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
735 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
736 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
737 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
738 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
739 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
740 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
741 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
742 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
743 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
744 return "H264 Set QP Value for HC Layers";
064f5096 745 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 746 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
747 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 748 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
749 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
750 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
751 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
752 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 753 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
754 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
755 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 756 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 757 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
758 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 759 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 760 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
761 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 762 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
cedc1210 763 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
0996517c 764
bc9028e1
AK		 765 /* VPX controls */
766 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
767 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
768 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
769 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
770 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
771 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
772 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 773 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
774 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
775 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
776 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 777 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 778
0996517c 779 /* CAMERA controls */
59253f29 780 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 781 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
782 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
783 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
784 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
785 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
786 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
787 case V4L2_CID_PAN_RESET: return "Pan, Reset";
788 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
789 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
790 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
791 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
792 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 793 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 794 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
795 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
796 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
797 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 798 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
799 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 800 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 801 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 802 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 803 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 804 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
805 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 806 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 807 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 808 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 809 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
810 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
811 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
812 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 813 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
814 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 815
59253f29
HV		 816 /* FM Radio Modulator controls */
817 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 818 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
819 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
820 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
821 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
822 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
823 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 824 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
825 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
826 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
827 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
828 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
829 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
830 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
831 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
832 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 833 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
834 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
835 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 836 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 837 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
838 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
839 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
840 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
841 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
842 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
843 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 844 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 845 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
846 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
847
0b159acd 848 /* Flash controls */
59253f29 849 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 850 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
851 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
852 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 853 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 854 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
855 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
856 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
857 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
858 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
859 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 860 case V4L2_CID_FLASH_FAULT: return "Faults";
861 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 862 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 863
c7361ae1 864 /* JPEG encoder controls */
59253f29 865 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 866 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
867 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
868 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
869 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
870 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
871
8c9d236e 872 /* Image source controls */
59253f29 873 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 874 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
875 case V4L2_CID_VBLANK: return "Vertical Blanking";
876 case V4L2_CID_HBLANK: return "Horizontal Blanking";
877 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 878 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
879 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
880 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
881 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 882
c643ee13 883 /* Image processing controls */
59253f29 884 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 885 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
886 case V4L2_CID_LINK_FREQ: return "Link Frequency";
887 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 888 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
446e4125 889 case V4L2_CID_DEINTERLACING_MODE: return "Deinterlacing Mode";
e72cb0e7 890 case V4L2_CID_DIGITAL_GAIN: return "Digital Gain";
c643ee13 891
977ebec7 892 /* DV controls */
59253f29 893 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 894 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
895 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
896 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
897 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
898 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
899 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
45cc29af 900 case V4L2_CID_DV_TX_IT_CONTENT_TYPE: return "Tx IT Content Type";
977ebec7
HV		 901 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
902 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
45cc29af 903 case V4L2_CID_DV_RX_IT_CONTENT_TYPE: return "Rx IT Content Type";
977ebec7 904
aec330a8
AS		 905 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
906 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
907 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad 908 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
41018cb8 909 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
80807fad
AP		 910 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
911 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
912 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
913 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
914 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
915 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 916 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
917 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 918 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 919 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
920 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
921 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
922 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
923 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
924 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 925
926 /* Detection controls */
927 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
928 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
929 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
930 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
931 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
932 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 933 default:
934 return NULL;
935 }
936}
937EXPORT_SYMBOL(v4l2_ctrl_get_name);
938
939void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 940 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 941{
942 *name = v4l2_ctrl_get_name(id);
943 *flags = 0;
944
945 switch (id) {
946 case V4L2_CID_AUDIO_MUTE:
947 case V4L2_CID_AUDIO_LOUDNESS:
948 case V4L2_CID_AUTO_WHITE_BALANCE:
949 case V4L2_CID_AUTOGAIN:
950 case V4L2_CID_HFLIP:
951 case V4L2_CID_VFLIP:
952 case V4L2_CID_HUE_AUTO:
953 case V4L2_CID_CHROMA_AGC:
954 case V4L2_CID_COLOR_KILLER:
a2f8b84f 955 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 956 case V4L2_CID_MPEG_AUDIO_MUTE:
957 case V4L2_CID_MPEG_VIDEO_MUTE:
958 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
959 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
960 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
961 case V4L2_CID_FOCUS_AUTO:
962 case V4L2_CID_PRIVACY:
963 case V4L2_CID_AUDIO_LIMITER_ENABLED:
964 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
965 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 966 case V4L2_CID_ILLUMINATORS_1:
967 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 968 case V4L2_CID_FLASH_STROBE_STATUS:
969 case V4L2_CID_FLASH_CHARGE:
970 case V4L2_CID_FLASH_READY:
064f5096
KD		 971 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
972 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
973 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
974 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
975 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
976 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
977 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 978 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 979 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 980 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 981 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 982 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
983 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
984 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 985 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 986 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 987 case V4L2_CID_RDS_TX_MONO_STEREO:
988 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
989 case V4L2_CID_RDS_TX_COMPRESSED:
990 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
991 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
992 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
993 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
994 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 995 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
996 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
997 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 998 *type = V4L2_CTRL_TYPE_BOOLEAN;
999 *min = 0;
1000 *max = *step = 1;
1001 break;
c0e681f5
HV		 1002 case V4L2_CID_ROTATE:
1003 *type = V4L2_CTRL_TYPE_INTEGER;
1004 *flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
1005 break;
bf0bedd3
AG		 1006 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
1007 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
1008 *type = V4L2_CTRL_TYPE_INTEGER;
1009 break;
cedc1210 1010 case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
0996517c
HV		 1011 case V4L2_CID_PAN_RESET:
1012 case V4L2_CID_TILT_RESET:
0b159acd
SA		 1013 case V4L2_CID_FLASH_STROBE:
1014 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 1015 case V4L2_CID_AUTO_FOCUS_START:
1016 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 1017 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RRD		 1018 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1019 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1020 *min = *max = *step = *def = 0;
1021 break;
1022 case V4L2_CID_POWER_LINE_FREQUENCY:
1023 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1024 case V4L2_CID_MPEG_AUDIO_ENCODING:
1025 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1026 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1027 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1028 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1029 case V4L2_CID_MPEG_AUDIO_MODE:
1030 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1031 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1032 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1033 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1034 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1035 case V4L2_CID_MPEG_VIDEO_ENCODING:
1036 case V4L2_CID_MPEG_VIDEO_ASPECT:
1037 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1038 case V4L2_CID_MPEG_STREAM_TYPE:
1039 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1040 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1041 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1042 case V4L2_CID_COLORFX:
e40a0573 1043 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1044 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1045 case V4L2_CID_FLASH_LED_MODE:
1046 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1047 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1048 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1049 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1050 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1051 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1052 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1053 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1054 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1055 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1056 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1057 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1058 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1059 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1060 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1061 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1062 case V4L2_CID_DV_TX_MODE:
1063 case V4L2_CID_DV_TX_RGB_RANGE:
45cc29af 1064 case V4L2_CID_DV_TX_IT_CONTENT_TYPE:
977ebec7 1065 case V4L2_CID_DV_RX_RGB_RANGE:
45cc29af 1066 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
5ebef0fb 1067 case V4L2_CID_TEST_PATTERN:
446e4125 1068 case V4L2_CID_DEINTERLACING_MODE:
aec330a8 1069 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1070 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
a77b4fc0 1071 case V4L2_CID_DETECT_MD_MODE:
0996517c
HV		 1072 *type = V4L2_CTRL_TYPE_MENU;
1073 break;
c643ee13
SA		 1074 case V4L2_CID_LINK_FREQ:
1075 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1076 break;
0996517c
HV		 1077 case V4L2_CID_RDS_TX_PS_NAME:
1078 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1079 case V4L2_CID_RDS_RX_PS_NAME:
1080 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1081 *type = V4L2_CTRL_TYPE_STRING;
1082 break;
7f84ad8b 1083 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1084 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1085 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1086 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1087 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1088 break;
0996517c
HV		 1089 case V4L2_CID_USER_CLASS:
1090 case V4L2_CID_CAMERA_CLASS:
1091 case V4L2_CID_MPEG_CLASS:
1092 case V4L2_CID_FM_TX_CLASS:
0b159acd 1093 case V4L2_CID_FLASH_CLASS:
c7361ae1 1094 case V4L2_CID_JPEG_CLASS:
8c9d236e 1095 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1096 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1097 case V4L2_CID_DV_CLASS:
aec330a8 1098 case V4L2_CID_FM_RX_CLASS:
80807fad 1099 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1100 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1101 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1102 /* You can neither read not write these */
1103 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1104 *min = *max = *step = *def = 0;
1105 break;
1106 case V4L2_CID_BG_COLOR:
1107 *type = V4L2_CTRL_TYPE_INTEGER;
1108 *step = 1;
1109 *min = 0;
1110 /* Max is calculated as RGB888 that is 2^24 */
1111 *max = 0xFFFFFF;
1112 break;
0b159acd 1113 case V4L2_CID_FLASH_FAULT:
c7361ae1 1114 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1115 case V4L2_CID_3A_LOCK:
2272ab65 1116 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1117 case V4L2_CID_DV_TX_HOTPLUG:
1118 case V4L2_CID_DV_TX_RXSENSE:
1119 case V4L2_CID_DV_TX_EDID_PRESENT:
1120 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1121 *type = V4L2_CTRL_TYPE_BITMASK;
1122 break;
064f5096
KD		 1123 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1124 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1125 *type = V4L2_CTRL_TYPE_INTEGER;
1126 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1127 break;
24c19a21 1128 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1129 *type = V4L2_CTRL_TYPE_INTEGER64;
1130 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1131 *min = *def = 0;
1132 *max = 0x1ffffffffLL;
1133 *step = 1;
1134 break;
1135 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1136 *type = V4L2_CTRL_TYPE_INTEGER64;
1137 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1138 *min = *def = 0;
1139 *max = 0x7fffffffffffffffLL;
1140 *step = 1;
1141 break;
c643ee13 1142 case V4L2_CID_PIXEL_RATE:
24c19a21 1143 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1144 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1145 break;
a77b4fc0
HV		 1146 case V4L2_CID_DETECT_MD_REGION_GRID:
1147 *type = V4L2_CTRL_TYPE_U8;
1148 break;
1149 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1150 *type = V4L2_CTRL_TYPE_U16;
1151 break;
811c5081
HV		 1152 case V4L2_CID_RDS_TX_ALT_FREQS:
1153 *type = V4L2_CTRL_TYPE_U32;
1154 break;
0996517c
HV		 1155 default:
1156 *type = V4L2_CTRL_TYPE_INTEGER;
1157 break;
1158 }
1159 switch (id) {
1160 case V4L2_CID_MPEG_AUDIO_ENCODING:
1161 case V4L2_CID_MPEG_AUDIO_MODE:
1162 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1163 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1164 case V4L2_CID_MPEG_STREAM_TYPE:
1165 *flags |= V4L2_CTRL_FLAG_UPDATE;
1166 break;
1167 case V4L2_CID_AUDIO_VOLUME:
1168 case V4L2_CID_AUDIO_BALANCE:
1169 case V4L2_CID_AUDIO_BASS:
1170 case V4L2_CID_AUDIO_TREBLE:
1171 case V4L2_CID_BRIGHTNESS:
1172 case V4L2_CID_CONTRAST:
1173 case V4L2_CID_SATURATION:
1174 case V4L2_CID_HUE:
1175 case V4L2_CID_RED_BALANCE:
1176 case V4L2_CID_BLUE_BALANCE:
1177 case V4L2_CID_GAMMA:
1178 case V4L2_CID_SHARPNESS:
1179 case V4L2_CID_CHROMA_GAIN:
1180 case V4L2_CID_RDS_TX_DEVIATION:
1181 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1182 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1183 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1184 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1185 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1186 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1187 case V4L2_CID_PILOT_TONE_DEVIATION:
1188 case V4L2_CID_PILOT_TONE_FREQUENCY:
1189 case V4L2_CID_TUNE_POWER_LEVEL:
1190 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
41018cb8 1191 case V4L2_CID_RF_TUNER_RF_GAIN:
80807fad
AP		 1192 case V4L2_CID_RF_TUNER_LNA_GAIN:
1193 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1194 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1195 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1196 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1197 *flags |= V4L2_CTRL_FLAG_SLIDER;
1198 break;
1199 case V4L2_CID_PAN_RELATIVE:
1200 case V4L2_CID_TILT_RELATIVE:
1201 case V4L2_CID_FOCUS_RELATIVE:
1202 case V4L2_CID_IRIS_RELATIVE:
1203 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RRD		 1204 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1205 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1206 break;
0b159acd 1207 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1208 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1209 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1210 case V4L2_CID_DV_TX_HOTPLUG:
1211 case V4L2_CID_DV_TX_RXSENSE:
1212 case V4L2_CID_DV_TX_EDID_PRESENT:
1213 case V4L2_CID_DV_RX_POWER_PRESENT:
45cc29af 1214 case V4L2_CID_DV_RX_IT_CONTENT_TYPE:
9570a148
HV		 1215 case V4L2_CID_RDS_RX_PTY:
1216 case V4L2_CID_RDS_RX_PS_NAME:
1217 case V4L2_CID_RDS_RX_RADIO_TEXT:
1218 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1219 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1220 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1221 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1222 break;
9aa4357e
AP		 1223 case V4L2_CID_RF_TUNER_PLL_LOCK:
1224 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1225 break;
0996517c
HV		 1226 }
1227}
1228EXPORT_SYMBOL(v4l2_ctrl_fill);
1229
6e239399
HV		 1230static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1231{
1232 memset(ev->reserved, 0, sizeof(ev->reserved));
1233 ev->type = V4L2_EVENT_CTRL;
1234 ev->id = ctrl->id;
1235 ev->u.ctrl.changes = changes;
1236 ev->u.ctrl.type = ctrl->type;
1237 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1238 if (ctrl->is_ptr)
6e239399
HV		 1239 ev->u.ctrl.value64 = 0;
1240 else
2a9ec373 1241 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1242 ev->u.ctrl.minimum = ctrl->minimum;
1243 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1244 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1245 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1246 ev->u.ctrl.step = 1;
1247 else
1248 ev->u.ctrl.step = ctrl->step;
1249 ev->u.ctrl.default_value = ctrl->default_value;
1250}
1251
1252static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1253{
1254 struct v4l2_event ev;
77068d36 1255 struct v4l2_subscribed_event *sev;
6e239399 1256
77068d36 1257 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1258 return;
6e239399
HV		 1259 fill_event(&ev, ctrl, changes);
1260
77068d36 1261 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1262 if (sev->fh != fh ||
1263 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1264 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1265}
1266
998e7659 1267static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1268 union v4l2_ctrl_ptr ptr1,
1269 union v4l2_ctrl_ptr ptr2)
1270{
1271 switch (ctrl->type) {
1272 case V4L2_CTRL_TYPE_BUTTON:
1273 return false;
1274 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1275 idx *= ctrl->elem_size;
0176077a 1276 /* strings are always 0-terminated */
265c7f8a 1277 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1278 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1279 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1280 case V4L2_CTRL_TYPE_U8:
1281 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1282 case V4L2_CTRL_TYPE_U16:
1283 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1284 case V4L2_CTRL_TYPE_U32:
1285 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1286 default:
265c7f8a
HV		 1287 if (ctrl->is_int)
1288 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1289 idx *= ctrl->elem_size;
1290 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1291 }
1292}
1293
998e7659 1294static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1295 union v4l2_ctrl_ptr ptr)
1296{
1297 switch (ctrl->type) {
1298 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1299 idx *= ctrl->elem_size;
1300 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1301 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1302 break;
1303 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1304 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1305 break;
1306 case V4L2_CTRL_TYPE_INTEGER:
1307 case V4L2_CTRL_TYPE_INTEGER_MENU:
1308 case V4L2_CTRL_TYPE_MENU:
1309 case V4L2_CTRL_TYPE_BITMASK:
1310 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1311 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1312 break;
dda4a4d5
HV		 1313 case V4L2_CTRL_TYPE_U8:
1314 ptr.p_u8[idx] = ctrl->default_value;
1315 break;
1316 case V4L2_CTRL_TYPE_U16:
1317 ptr.p_u16[idx] = ctrl->default_value;
1318 break;
811c5081
HV		 1319 case V4L2_CTRL_TYPE_U32:
1320 ptr.p_u32[idx] = ctrl->default_value;
1321 break;
0176077a 1322 default:
302ab7ce
HV		 1323 idx *= ctrl->elem_size;
1324 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1325 break;
1326 }
1327}
1328
1329static void std_log(const struct v4l2_ctrl *ctrl)
1330{
1331 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1332
998e7659
HV		 1333 if (ctrl->is_array) {
1334 unsigned i;
1335
1336 for (i = 0; i < ctrl->nr_of_dims; i++)
1337 pr_cont("[%u]", ctrl->dims[i]);
1338 pr_cont(" ");
1339 }
1340
0176077a
HV		 1341 switch (ctrl->type) {
1342 case V4L2_CTRL_TYPE_INTEGER:
1343 pr_cont("%d", *ptr.p_s32);
1344 break;
1345 case V4L2_CTRL_TYPE_BOOLEAN:
1346 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1347 break;
1348 case V4L2_CTRL_TYPE_MENU:
1349 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1350 break;
1351 case V4L2_CTRL_TYPE_INTEGER_MENU:
1352 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1353 break;
1354 case V4L2_CTRL_TYPE_BITMASK:
1355 pr_cont("0x%08x", *ptr.p_s32);
1356 break;
1357 case V4L2_CTRL_TYPE_INTEGER64:
1358 pr_cont("%lld", *ptr.p_s64);
1359 break;
1360 case V4L2_CTRL_TYPE_STRING:
1361 pr_cont("%s", ptr.p_char);
1362 break;
dda4a4d5
HV		 1363 case V4L2_CTRL_TYPE_U8:
1364 pr_cont("%u", (unsigned)*ptr.p_u8);
1365 break;
1366 case V4L2_CTRL_TYPE_U16:
1367 pr_cont("%u", (unsigned)*ptr.p_u16);
1368 break;
811c5081
HV		 1369 case V4L2_CTRL_TYPE_U32:
1370 pr_cont("%u", (unsigned)*ptr.p_u32);
1371 break;
0176077a
HV		 1372 default:
1373 pr_cont("unknown type %d", ctrl->type);
1374 break;
1375 }
1376}
1377
958c7c7e
HV		 1378/*
1379 * Round towards the closest legal value. Be careful when we are
1380 * close to the maximum range of the control type to prevent
1381 * wrap-arounds.
1382 */
0176077a
HV		 1383#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1384({ \
1385 offset_type offset; \
958c7c7e 1386 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1387 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1388 val = (ctrl)->maximum; \
1389 else \
9c9cb1fa 1390 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1391 val = clamp_t(typeof(val), val, \
1392 (ctrl)->minimum, (ctrl)->maximum); \
1393 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1394 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1395 val = (ctrl)->minimum + offset; \
1396 0; \
1397})
1398
1399/* Validate a new control */
998e7659 1400static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1401 union v4l2_ctrl_ptr ptr)
1402{
1403 size_t len;
0d5e8c43
HV		 1404 u64 offset;
1405 s64 val;
0176077a
HV		 1406
1407 switch (ctrl->type) {
1408 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1409 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1410 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1411 /*
1412 * We can't use the ROUND_TO_RANGE define here due to
1413 * the u64 divide that needs special care.
1414 */
1415 val = ptr.p_s64[idx];
9c9cb1fa 1416 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1417 val = ctrl->maximum;
1418 else
9c9cb1fa 1419 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1420 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1421 offset = val - ctrl->minimum;
1422 do_div(offset, ctrl->step);
1423 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1424 return 0;
dda4a4d5
HV		 1425 case V4L2_CTRL_TYPE_U8:
1426 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1427 case V4L2_CTRL_TYPE_U16:
1428 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1429 case V4L2_CTRL_TYPE_U32:
1430 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1431
1432 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1433 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1434 return 0;
1435
1436 case V4L2_CTRL_TYPE_MENU:
1437 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1438 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1439 return -ERANGE;
265c7f8a 1440 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1441 return -EINVAL;
1442 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1443 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1444 return -EINVAL;
1445 return 0;
1446
1447 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1448 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1449 return 0;
1450
1451 case V4L2_CTRL_TYPE_BUTTON:
1452 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1453 ptr.p_s32[idx] = 0;
0176077a
HV		 1454 return 0;
1455
1456 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1457 idx *= ctrl->elem_size;
1458 len = strlen(ptr.p_char + idx);
0176077a
HV		 1459 if (len < ctrl->minimum)
1460 return -ERANGE;
0d5e8c43 1461 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1462 return -ERANGE;
1463 return 0;
1464
1465 default:
1466 return -EINVAL;
1467 }
1468}
1469
1470static const struct v4l2_ctrl_type_ops std_type_ops = {
1471 .equal = std_equal,
1472 .init = std_init,
1473 .log = std_log,
1474 .validate = std_validate,
1475};
1476
000e4f9a
HV		 1477/* Helper function: copy the given control value back to the caller */
1478static int ptr_to_user(struct v4l2_ext_control *c,
1479 struct v4l2_ctrl *ctrl,
1480 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1481{
1482 u32 len;
1483
d9a25471 1484 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1485 return copy_to_user(c->ptr, ptr.p, c->size) ?
1486 -EFAULT : 0;
d9a25471 1487
0996517c
HV		 1488 switch (ctrl->type) {
1489 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1490 len = strlen(ptr.p_char);
0996517c 1491 if (c->size < len + 1) {
c336f75e 1492 c->size = ctrl->elem_size;
0996517c
HV		 1493 return -ENOSPC;
1494 }
000e4f9a 1495 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1496 -EFAULT : 0;
0996517c 1497 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1498 c->value64 = *ptr.p_s64;
0996517c
HV		 1499 break;
1500 default:
000e4f9a 1501 c->value = *ptr.p_s32;
0996517c
HV		 1502 break;
1503 }
1504 return 0;
1505}
1506
000e4f9a
HV		 1507/* Helper function: copy the current control value back to the caller */
1508static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1509 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1510{
1511 return ptr_to_user(c, ctrl, ctrl->p_cur);
1512}
1513
1514/* Helper function: copy the new control value back to the caller */
1515static int new_to_user(struct v4l2_ext_control *c,
1516 struct v4l2_ctrl *ctrl)
1517{
1518 return ptr_to_user(c, ctrl, ctrl->p_new);
1519}
1520
953eae5d
RRD		 1521/* Helper function: copy the initial control value back to the caller */
1522static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1523{
1524 int idx;
1525
1526 for (idx = 0; idx < ctrl->elems; idx++)
1527 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1528
1529 return ptr_to_user(c, ctrl, ctrl->p_new);
1530}
1531
000e4f9a
HV		 1532/* Helper function: copy the caller-provider value to the given control value */
1533static int user_to_ptr(struct v4l2_ext_control *c,
1534 struct v4l2_ctrl *ctrl,
1535 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1536{
1537 int ret;
1538 u32 size;
1539
2a863793 1540 ctrl->is_new = 1;
302ab7ce
HV		 1541 if (ctrl->is_ptr && !ctrl->is_string) {
1542 unsigned idx;
1543
40265bbe 1544 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1545 if (ret || !ctrl->is_array)
1546 return ret;
1547 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1548 ctrl->type_ops->init(ctrl, idx, ptr);
1549 return 0;
1550 }
d9a25471 1551
0996517c
HV		 1552 switch (ctrl->type) {
1553 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1554 *ptr.p_s64 = c->value64;
0996517c
HV		 1555 break;
1556 case V4L2_CTRL_TYPE_STRING:
1557 size = c->size;
1558 if (size == 0)
1559 return -ERANGE;
1560 if (size > ctrl->maximum + 1)
1561 size = ctrl->maximum + 1;
40265bbe 1562 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1563 if (!ret) {
000e4f9a 1564 char last = ptr.p_char[size - 1];
0996517c 1565
000e4f9a 1566 ptr.p_char[size - 1] = 0;
0996517c
HV		 1567 /* If the string was longer than ctrl->maximum,
1568 then return an error. */
000e4f9a 1569 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1570 return -ERANGE;
1571 }
40265bbe 1572 return ret;
0996517c 1573 default:
000e4f9a 1574 *ptr.p_s32 = c->value;
0996517c
HV		 1575 break;
1576 }
1577 return 0;
1578}
1579
000e4f9a
HV		 1580/* Helper function: copy the caller-provider value as the new control value */
1581static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1582 struct v4l2_ctrl *ctrl)
1583{
000e4f9a
HV		 1584 return user_to_ptr(c, ctrl, ctrl->p_new);
1585}
d9a25471 1586
000e4f9a
HV		 1587/* Copy the one value to another. */
1588static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1589 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1590{
1591 if (ctrl == NULL)
1592 return;
302ab7ce 1593 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1594}
1595
1596/* Copy the new value to the current value. */
2ccbe779 1597static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1598{
000e4f9a 1599 bool changed;
6e239399 1600
0996517c
HV		 1601 if (ctrl == NULL)
1602 return;
9ea1b7a4
HV		 1603
1604 /* has_changed is set by cluster_changed */
1605 changed = ctrl->has_changed;
1606 if (changed)
1607 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1608
2ccbe779
SN		 1609 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1610 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1611 ctrl->flags &=
1612 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1613 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1614 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1615 if (ctrl->cluster[0]->has_volatiles)
1616 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1617 }
1249a3a8 1618 fh = NULL;
72d877ca 1619 }
2ccbe779 1620 if (changed || ch_flags) {
639884a6
HV		 1621 /* If a control was changed that was not one of the controls
1622 modified by the application, then send the event to all. */
1623 if (!ctrl->is_new)
1624 fh = NULL;
6e239399 1625 send_event(fh, ctrl,
2ccbe779 1626 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1627 if (ctrl->call_notify && changed && ctrl->handler->notify)
1628 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1629 }
0996517c
HV		 1630}
1631
1632/* Copy the current value to the new value */
1633static void cur_to_new(struct v4l2_ctrl *ctrl)
1634{
1635 if (ctrl == NULL)
1636 return;
000e4f9a 1637 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1638}
1639
1640/* Return non-zero if one or more of the controls in the cluster has a new
1641 value that differs from the current value. */
1642static int cluster_changed(struct v4l2_ctrl *master)
1643{
9ea1b7a4 1644 bool changed = false;
302ab7ce 1645 unsigned idx;
0996517c
HV		 1646 int i;
1647
9ea1b7a4 1648 for (i = 0; i < master->ncontrols; i++) {
0996517c 1649 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1650 bool ctrl_changed = false;
0996517c
HV		 1651
1652 if (ctrl == NULL)
1653 continue;
45f014c5
RRD		 1654
1655 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1656 changed = ctrl_changed = true;
1657
b08d8d26
RRD		 1658 /*
1659 * Set has_changed to false to avoid generating
1660 * the event V4L2_EVENT_CTRL_CH_VALUE
1661 */
1662 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1663 ctrl->has_changed = false;
1664 continue;
1665 }
1666
302ab7ce
HV		 1667 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1668 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1669 ctrl->p_cur, ctrl->p_new);
302ab7ce 1670 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1671 changed |= ctrl->has_changed;
0996517c 1672 }
9ea1b7a4 1673 return changed;
0996517c
HV		 1674}
1675
2ccbe779
SN		 1676/* Control range checking */
1677static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1678 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1679{
1680 switch (type) {
1681 case V4L2_CTRL_TYPE_BOOLEAN:
1682 if (step != 1 || max > 1 || min < 0)
1683 return -ERANGE;
1684 /* fall through */
dda4a4d5
HV		 1685 case V4L2_CTRL_TYPE_U8:
1686 case V4L2_CTRL_TYPE_U16:
811c5081 1687 case V4L2_CTRL_TYPE_U32:
2ccbe779 1688 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1689 case V4L2_CTRL_TYPE_INTEGER64:
1690 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1691 return -ERANGE;
1692 return 0;
1693 case V4L2_CTRL_TYPE_BITMASK:
1694 if (step || min || !max || (def & ~max))
1695 return -ERANGE;
1696 return 0;
1697 case V4L2_CTRL_TYPE_MENU:
1698 case V4L2_CTRL_TYPE_INTEGER_MENU:
1699 if (min > max || def < min || def > max)
1700 return -ERANGE;
1701 /* Note: step == menu_skip_mask for menu controls.
1702 So here we check if the default value is masked out. */
1703 if (step && ((1 << def) & step))
1704 return -EINVAL;
1705 return 0;
1706 case V4L2_CTRL_TYPE_STRING:
1707 if (min > max || min < 0 || step < 1 || def)
1708 return -ERANGE;
1709 return 0;
1710 default:
1711 return 0;
1712 }
1713}
1714
03d5285b 1715/* Validate a new control */
7a7f1ab3 1716static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1717{
302ab7ce
HV		 1718 unsigned idx;
1719 int err = 0;
1720
7a7f1ab3
HV		 1721 for (idx = 0; !err && idx < ctrl->elems; idx++)
1722 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1723 return err;
0996517c
HV		 1724}
1725
1726static inline u32 node2id(struct list_head *node)
1727{
1728 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1729}
1730
1731/* Set the handler's error code if it wasn't set earlier already */
1732static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1733{
1734 if (hdl->error == 0)
1735 hdl->error = err;
1736 return err;
1737}
1738
1739/* Initialize the handler */
6cd247ef
AW		 1740int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1741 unsigned nr_of_controls_hint,
1742 struct lock_class_key *key, const char *name)
0996517c 1743{
48e3e36a 1744 mutex_init(&hdl->_lock);
77e7c4e6 1745 hdl->lock = &hdl->_lock;
6cd247ef 1746 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1747 INIT_LIST_HEAD(&hdl->ctrls);
1748 INIT_LIST_HEAD(&hdl->ctrl_refs);
1749 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
758d90e1
TF		 1750 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
1751 sizeof(hdl->buckets[0]),
1752 GFP_KERNEL | __GFP_ZERO);
0996517c
HV		 1753 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1754 return hdl->error;
1755}
6cd247ef 1756EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1757
1758/* Free all controls and control refs */
1759void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1760{
1761 struct v4l2_ctrl_ref *ref, *next_ref;
1762 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1763 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1764
1765 if (hdl == NULL || hdl->buckets == NULL)
1766 return;
1767
77e7c4e6 1768 mutex_lock(hdl->lock);
0996517c
HV		 1769 /* Free all nodes */
1770 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1771 list_del(&ref->node);
1772 kfree(ref);
1773 }
1774 /* Free all controls owned by the handler */
1775 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1776 list_del(&ctrl->node);
77068d36
HV		 1777 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1778 list_del(&sev->node);
758d90e1 1779 kvfree(ctrl);
0996517c 1780 }
758d90e1 1781 kvfree(hdl->buckets);
0996517c
HV		 1782 hdl->buckets = NULL;
1783 hdl->cached = NULL;
1784 hdl->error = 0;
77e7c4e6 1785 mutex_unlock(hdl->lock);
48e3e36a 1786 mutex_destroy(&hdl->_lock);
0996517c
HV		 1787}
1788EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1789
1790/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1791 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1792 with applications that do not use the NEXT_CTRL flag.
1793
1794 We just find the n-th private user control. It's O(N), but that should not
1795 be an issue in this particular case. */
1796static struct v4l2_ctrl_ref *find_private_ref(
1797 struct v4l2_ctrl_handler *hdl, u32 id)
1798{
1799 struct v4l2_ctrl_ref *ref;
1800
1801 id -= V4L2_CID_PRIVATE_BASE;
1802 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1803 /* Search for private user controls that are compatible with
1804 VIDIOC_G/S_CTRL. */
0f8017be 1805 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 1806 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1807 if (!ref->ctrl->is_int)
0996517c
HV		 1808 continue;
1809 if (id == 0)
1810 return ref;
1811 id--;
1812 }
1813 }
1814 return NULL;
1815}
1816
1817/* Find a control with the given ID. */
1818static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1819{
1820 struct v4l2_ctrl_ref *ref;
1821 int bucket;
1822
1823 id &= V4L2_CTRL_ID_MASK;
1824
1825 /* Old-style private controls need special handling */
1826 if (id >= V4L2_CID_PRIVATE_BASE)
1827 return find_private_ref(hdl, id);
1828 bucket = id % hdl->nr_of_buckets;
1829
1830 /* Simple optimization: cache the last control found */
1831 if (hdl->cached && hdl->cached->ctrl->id == id)
1832 return hdl->cached;
1833
1834 /* Not in cache, search the hash */
1835 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1836 while (ref && ref->ctrl->id != id)
1837 ref = ref->next;
1838
1839 if (ref)
1840 hdl->cached = ref; /* cache it! */
1841 return ref;
1842}
1843
1844/* Find a control with the given ID. Take the handler's lock first. */
1845static struct v4l2_ctrl_ref *find_ref_lock(
1846 struct v4l2_ctrl_handler *hdl, u32 id)
1847{
1848 struct v4l2_ctrl_ref *ref = NULL;
1849
1850 if (hdl) {
77e7c4e6 1851 mutex_lock(hdl->lock);
0996517c 1852 ref = find_ref(hdl, id);
77e7c4e6 1853 mutex_unlock(hdl->lock);
0996517c
HV		 1854 }
1855 return ref;
1856}
1857
1858/* Find a control with the given ID. */
1859struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1860{
1861 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1862
1863 return ref ? ref->ctrl : NULL;
1864}
1865EXPORT_SYMBOL(v4l2_ctrl_find);
1866
1867/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1868static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1869 struct v4l2_ctrl *ctrl)
1870{
1871 struct v4l2_ctrl_ref *ref;
1872 struct v4l2_ctrl_ref *new_ref;
1873 u32 id = ctrl->id;
0f8017be 1874 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c
HV		 1875 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1876
d9a25471
HV		 1877 /*
1878 * Automatically add the control class if it is not yet present and
1879 * the new control is not a compound control.
1880 */
1881 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1882 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1883 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1884 return hdl->error;
1885
1886 if (hdl->error)
1887 return hdl->error;
1888
1889 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1890 if (!new_ref)
1891 return handler_set_err(hdl, -ENOMEM);
1892 new_ref->ctrl = ctrl;
1893 if (ctrl->handler == hdl) {
1894 /* By default each control starts in a cluster of its own.
1895 new_ref->ctrl is basically a cluster array with one
1896 element, so that's perfect to use as the cluster pointer.
1897 But only do this for the handler that owns the control. */
1898 ctrl->cluster = &new_ref->ctrl;
1899 ctrl->ncontrols = 1;
1900 }
1901
1902 INIT_LIST_HEAD(&new_ref->node);
1903
77e7c4e6 1904 mutex_lock(hdl->lock);
0996517c
HV		 1905
1906 /* Add immediately at the end of the list if the list is empty, or if
1907 the last element in the list has a lower ID.
1908 This ensures that when elements are added in ascending order the
1909 insertion is an O(1) operation. */
1910 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1911 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1912 goto insert_in_hash;
1913 }
1914
1915 /* Find insert position in sorted list */
1916 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1917 if (ref->ctrl->id < id)
1918 continue;
1919 /* Don't add duplicates */
1920 if (ref->ctrl->id == id) {
1921 kfree(new_ref);
1922 goto unlock;
1923 }
1924 list_add(&new_ref->node, ref->node.prev);
1925 break;
1926 }
1927
1928insert_in_hash:
1929 /* Insert the control node in the hash */
1930 new_ref->next = hdl->buckets[bucket];
1931 hdl->buckets[bucket] = new_ref;
1932
1933unlock:
77e7c4e6 1934 mutex_unlock(hdl->lock);
0996517c
HV		 1935 return 0;
1936}
1937
1938/* Add a new control */
1939static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1940 const struct v4l2_ctrl_ops *ops,
0176077a 1941 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1942 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1943 s64 min, s64 max, u64 step, s64 def,
20d88eef 1944 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1945 u32 flags, const char * const *qmenu,
1946 const s64 *qmenu_int, void *priv)
0996517c
HV		 1947{
1948 struct v4l2_ctrl *ctrl;
d9a25471 1949 unsigned sz_extra;
20d88eef
HV		 1950 unsigned nr_of_dims = 0;
1951 unsigned elems = 1;
998e7659
HV		 1952 bool is_array;
1953 unsigned tot_ctrl_size;
302ab7ce 1954 unsigned idx;
d9a25471 1955 void *data;
2ccbe779 1956 int err;
0996517c
HV		 1957
1958 if (hdl->error)
1959 return NULL;
1960
20d88eef
HV		 1961 while (dims && dims[nr_of_dims]) {
1962 elems *= dims[nr_of_dims];
1963 nr_of_dims++;
1964 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1965 break;
1966 }
998e7659 1967 is_array = nr_of_dims > 0;
20d88eef 1968
dda4a4d5
HV		 1969 /* Prefill elem_size for all types handled by std_type_ops */
1970 switch (type) {
1971 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1972 elem_size = sizeof(s64);
dda4a4d5
HV		 1973 break;
1974 case V4L2_CTRL_TYPE_STRING:
d9a25471 1975 elem_size = max + 1;
dda4a4d5
HV		 1976 break;
1977 case V4L2_CTRL_TYPE_U8:
1978 elem_size = sizeof(u8);
1979 break;
1980 case V4L2_CTRL_TYPE_U16:
1981 elem_size = sizeof(u16);
1982 break;
811c5081
HV		 1983 case V4L2_CTRL_TYPE_U32:
1984 elem_size = sizeof(u32);
1985 break;
dda4a4d5
HV		 1986 default:
1987 if (type < V4L2_CTRL_COMPOUND_TYPES)
1988 elem_size = sizeof(s32);
1989 break;
1990 }
998e7659 1991 tot_ctrl_size = elem_size * elems;
d9a25471 1992
0996517c 1993 /* Sanity checks */
998e7659
HV		 1994 if (id == 0 || name == NULL || !elem_size ||
1995 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1996 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1997 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1998 handler_set_err(hdl, -ERANGE);
1999 return NULL;
2000 }
2ccbe779
SN		 2001 err = check_range(type, min, max, step, def);
2002 if (err) {
2003 handler_set_err(hdl, err);
02ac0480
HV		 2004 return NULL;
2005 }
fa4d7096
HV		 2006 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
2007 handler_set_err(hdl, -ERANGE);
2008 return NULL;
2009 }
998e7659
HV		 2010 if (is_array &&
2011 (type == V4L2_CTRL_TYPE_BUTTON ||
2012 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2013 handler_set_err(hdl, -EINVAL);
2014 return NULL;
2015 }
0996517c 2016
d9a25471 2017 sz_extra = 0;
0996517c 2018 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RRD		 2019 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2020 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 2021 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2022 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 2023 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2024 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 2025 type >= V4L2_CTRL_COMPOUND_TYPES ||
2026 is_array)
2027 sz_extra += 2 * tot_ctrl_size;
0996517c 2028
758d90e1 2029 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
0996517c
HV		 2030 if (ctrl == NULL) {
2031 handler_set_err(hdl, -ENOMEM);
2032 return NULL;
2033 }
2034
2035 INIT_LIST_HEAD(&ctrl->node);
77068d36 2036 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2037 ctrl->handler = hdl;
2038 ctrl->ops = ops;
0176077a 2039 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2040 ctrl->id = id;
2041 ctrl->name = name;
2042 ctrl->type = type;
2043 ctrl->flags = flags;
2044 ctrl->minimum = min;
2045 ctrl->maximum = max;
2046 ctrl->step = step;
d9a25471 2047 ctrl->default_value = def;
998e7659
HV		 2048 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2049 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2050 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2051 ctrl->is_array = is_array;
20d88eef
HV		 2052 ctrl->elems = elems;
2053 ctrl->nr_of_dims = nr_of_dims;
2054 if (nr_of_dims)
2055 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2056 ctrl->elem_size = elem_size;
ce580fe5
SA		 2057 if (type == V4L2_CTRL_TYPE_MENU)
2058 ctrl->qmenu = qmenu;
2059 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2060 ctrl->qmenu_int = qmenu_int;
0996517c 2061 ctrl->priv = priv;
d9a25471 2062 ctrl->cur.val = ctrl->val = def;
2a9ec373 2063 data = &ctrl[1];
d9a25471 2064
2a9ec373
HV		 2065 if (!ctrl->is_int) {
2066 ctrl->p_new.p = data;
998e7659 2067 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2068 } else {
2069 ctrl->p_new.p = &ctrl->val;
2070 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2071 }
302ab7ce
HV		 2072 for (idx = 0; idx < elems; idx++) {
2073 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2074 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2075 }
0176077a 2076
0996517c 2077 if (handler_new_ref(hdl, ctrl)) {
758d90e1 2078 kvfree(ctrl);
0996517c
HV		 2079 return NULL;
2080 }
77e7c4e6 2081 mutex_lock(hdl->lock);
0996517c 2082 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2083 mutex_unlock(hdl->lock);
0996517c
HV		 2084 return ctrl;
2085}
2086
2087struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2088 const struct v4l2_ctrl_config *cfg, void *priv)
2089{
2090 bool is_menu;
2091 struct v4l2_ctrl *ctrl;
2092 const char *name = cfg->name;
513521ea 2093 const char * const *qmenu = cfg->qmenu;
ce580fe5 2094 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2095 enum v4l2_ctrl_type type = cfg->type;
2096 u32 flags = cfg->flags;
0ba2aeb6
HV		 2097 s64 min = cfg->min;
2098 s64 max = cfg->max;
2099 u64 step = cfg->step;
2100 s64 def = cfg->def;
0996517c
HV		 2101
2102 if (name == NULL)
2103 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2104 &def, &flags);
2105
ce580fe5
SA		 2106 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2107 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2108 if (is_menu)
2109 WARN_ON(step);
2110 else
2111 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2112 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2113 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2114 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2115 qmenu_int == NULL) {
2116 handler_set_err(hdl, -EINVAL);
2117 return NULL;
2118 }
0996517c 2119
0176077a 2120 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2121 type, min, max,
20d88eef
HV		 2122 is_menu ? cfg->menu_skip_mask : step, def,
2123 cfg->dims, cfg->elem_size,
d9a25471 2124 flags, qmenu, qmenu_int, priv);
88365105 2125 if (ctrl)
0996517c 2126 ctrl->is_private = cfg->is_private;
0996517c
HV		 2127 return ctrl;
2128}
2129EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2130
2131/* Helper function for standard non-menu controls */
2132struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2133 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2134 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2135{
2136 const char *name;
2137 enum v4l2_ctrl_type type;
2138 u32 flags;
2139
2140 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2141 if (type == V4L2_CTRL_TYPE_MENU ||
2142 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2143 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2144 handler_set_err(hdl, -EINVAL);
2145 return NULL;
2146 }
0176077a 2147 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2148 min, max, step, def, NULL, 0,
d9a25471 2149 flags, NULL, NULL, NULL);
0996517c
HV		 2150}
2151EXPORT_SYMBOL(v4l2_ctrl_new_std);
2152
2153/* Helper function for standard menu controls */
2154struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2155 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2156 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2157{
d1e9b7c1
SN		 2158 const char * const *qmenu = NULL;
2159 const s64 *qmenu_int = NULL;
fbbb29a6 2160 unsigned int qmenu_int_len = 0;
0996517c
HV		 2161 const char *name;
2162 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2163 s64 min;
2164 s64 max = _max;
2165 s64 def = _def;
2166 u64 step;
0996517c
HV		 2167 u32 flags;
2168
2169 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2170
2171 if (type == V4L2_CTRL_TYPE_MENU)
2172 qmenu = v4l2_ctrl_get_menu(id);
2173 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2174 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2175
2176 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2177 handler_set_err(hdl, -EINVAL);
2178 return NULL;
2179 }
0176077a 2180 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2181 0, max, mask, def, NULL, 0,
d9a25471 2182 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2183}
2184EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2185
117a711a
LP		 2186/* Helper function for standard menu controls with driver defined menu */
2187struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2188 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2189 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2190{
2191 enum v4l2_ctrl_type type;
2192 const char *name;
2193 u32 flags;
0ba2aeb6
HV		 2194 u64 step;
2195 s64 min;
2196 s64 max = _max;
2197 s64 def = _def;
117a711a
LP		 2198
2199 /* v4l2_ctrl_new_std_menu_items() should only be called for
2200 * standard controls without a standard menu.
2201 */
2202 if (v4l2_ctrl_get_menu(id)) {
2203 handler_set_err(hdl, -EINVAL);
2204 return NULL;
2205 }
2206
2207 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2208 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2209 handler_set_err(hdl, -EINVAL);
2210 return NULL;
2211 }
0176077a 2212 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2213 0, max, mask, def, NULL, 0,
2214 flags, qmenu, NULL, NULL);
117a711a
LP		 2215
2216}
2217EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2218
515f3287
SN		 2219/* Helper function for standard integer menu controls */
2220struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2221 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2222 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2223{
2224 const char *name;
2225 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2226 s64 min;
2227 u64 step;
2228 s64 max = _max;
2229 s64 def = _def;
515f3287
SN		 2230 u32 flags;
2231
2232 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2233 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2234 handler_set_err(hdl, -EINVAL);
2235 return NULL;
2236 }
0176077a 2237 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2238 0, max, 0, def, NULL, 0,
d9a25471 2239 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2240}
2241EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2242
0996517c
HV		 2243/* Add the controls from another handler to our own. */
2244int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2245 struct v4l2_ctrl_handler *add,
2246 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2247{
072e6602 2248 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2249 int ret = 0;
2250
2251 /* Do nothing if either handler is NULL or if they are the same */
2252 if (!hdl || !add || hdl == add)
2253 return 0;
2254 if (hdl->error)
2255 return hdl->error;
77e7c4e6 2256 mutex_lock(add->lock);
072e6602
HV		 2257 list_for_each_entry(ref, &add->ctrl_refs, node) {
2258 struct v4l2_ctrl *ctrl = ref->ctrl;
2259
0996517c
HV		 2260 /* Skip handler-private controls. */
2261 if (ctrl->is_private)
2262 continue;
6e239399
HV		 2263 /* And control classes */
2264 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2265 continue;
34a6b7d0
HV		 2266 /* Filter any unwanted controls */
2267 if (filter && !filter(ctrl))
2268 continue;
0996517c
HV		 2269 ret = handler_new_ref(hdl, ctrl);
2270 if (ret)
2271 break;
2272 }
77e7c4e6 2273 mutex_unlock(add->lock);
0996517c
HV		 2274 return ret;
2275}
2276EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2277
34a6b7d0
HV		 2278bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2279{
0f8017be 2280 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2281 return true;
0f8017be 2282 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2283 return true;
34a6b7d0
HV		 2284 switch (ctrl->id) {
2285 case V4L2_CID_AUDIO_MUTE:
2286 case V4L2_CID_AUDIO_VOLUME:
2287 case V4L2_CID_AUDIO_BALANCE:
2288 case V4L2_CID_AUDIO_BASS:
2289 case V4L2_CID_AUDIO_TREBLE:
2290 case V4L2_CID_AUDIO_LOUDNESS:
2291 return true;
2292 default:
2293 break;
2294 }
2295 return false;
2296}
2297EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2298
0996517c
HV		 2299/* Cluster controls */
2300void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2301{
5626b8c7 2302 bool has_volatiles = false;
0996517c
HV		 2303 int i;
2304
2305 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2306 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2307 return;
0996517c
HV		 2308
2309 for (i = 0; i < ncontrols; i++) {
2310 if (controls[i]) {
2311 controls[i]->cluster = controls;
2312 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2313 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2314 has_volatiles = true;
0996517c
HV		 2315 }
2316 }
5626b8c7 2317 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2318}
2319EXPORT_SYMBOL(v4l2_ctrl_cluster);
2320
72d877ca
HV		 2321void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2322 u8 manual_val, bool set_volatile)
2323{
2324 struct v4l2_ctrl *master = controls[0];
5626b8c7 2325 u32 flag = 0;
72d877ca
HV		 2326 int i;
2327
2328 v4l2_ctrl_cluster(ncontrols, controls);
2329 WARN_ON(ncontrols <= 1);
82a7c049 2330 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2331 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2332 master->is_auto = true;
5626b8c7 2333 master->has_volatiles = set_volatile;
72d877ca
HV		 2334 master->manual_mode_value = manual_val;
2335 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2336
2337 if (!is_cur_manual(master))
2338 flag = V4L2_CTRL_FLAG_INACTIVE |
2339 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2340
2341 for (i = 1; i < ncontrols; i++)
88365105 2342 if (controls[i])
72d877ca 2343 controls[i]->flags |= flag;
72d877ca
HV		 2344}
2345EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2346
0996517c
HV		 2347/* Activate/deactivate a control. */
2348void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2349{
6e239399
HV		 2350 /* invert since the actual flag is called 'inactive' */
2351 bool inactive = !active;
2352 bool old;
2353
0996517c
HV		 2354 if (ctrl == NULL)
2355 return;
2356
6e239399 2357 if (inactive)
0996517c 2358 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2359 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2360 else
2361 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2362 old = test_and_clear_bit(4, &ctrl->flags);
2363 if (old != inactive)
2364 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2365}
2366EXPORT_SYMBOL(v4l2_ctrl_activate);
2367
2368/* Grab/ungrab a control.
2369 Typically used when streaming starts and you want to grab controls,
2370 preventing the user from changing them.
2371
2372 Just call this and the framework will block any attempts to change
2373 these controls. */
2374void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2375{
6e239399
HV		 2376 bool old;
2377
0996517c
HV		 2378 if (ctrl == NULL)
2379 return;
2380
6e239399 2381 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2382 if (grabbed)
2383 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2384 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2385 else
2386 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2387 old = test_and_clear_bit(1, &ctrl->flags);
2388 if (old != grabbed)
2389 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2390 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2391}
2392EXPORT_SYMBOL(v4l2_ctrl_grab);
2393
2394/* Log the control name and value */
2395static void log_ctrl(const struct v4l2_ctrl *ctrl,
2396 const char *prefix, const char *colon)
2397{
0996517c
HV		 2398 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2399 return;
2400 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2401 return;
2402
7eafbce9 2403 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2404
0176077a
HV		 2405 ctrl->type_ops->log(ctrl);
2406
88365105
HV		 2407 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2408 V4L2_CTRL_FLAG_GRABBED |
2409 V4L2_CTRL_FLAG_VOLATILE)) {
2410 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2411 pr_cont(" inactive");
88365105 2412 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2413 pr_cont(" grabbed");
88365105 2414 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2415 pr_cont(" volatile");
88365105 2416 }
7eafbce9 2417 pr_cont("\n");
0996517c
HV		 2418}
2419
2420/* Log all controls owned by the handler */
2421void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2422 const char *prefix)
2423{
2424 struct v4l2_ctrl *ctrl;
2425 const char *colon = "";
2426 int len;
2427
2428 if (hdl == NULL)
2429 return;
2430 if (prefix == NULL)
2431 prefix = "";
2432 len = strlen(prefix);
2433 if (len && prefix[len - 1] != ' ')
2434 colon = ": ";
77e7c4e6 2435 mutex_lock(hdl->lock);
0996517c
HV		 2436 list_for_each_entry(ctrl, &hdl->ctrls, node)
2437 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2438 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2439 mutex_unlock(hdl->lock);
0996517c
HV		 2440}
2441EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2442
ffa9b9f0
SN		 2443int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2444{
2445 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2446 return 0;
2447}
2448EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2449
0996517c 2450/* Call s_ctrl for all controls owned by the handler */
cc0140e2 2451int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
0996517c
HV		 2452{
2453 struct v4l2_ctrl *ctrl;
2454 int ret = 0;
2455
2456 if (hdl == NULL)
2457 return 0;
cc0140e2
SA		 2458
2459 lockdep_assert_held(hdl->lock);
2460
0996517c
HV		 2461 list_for_each_entry(ctrl, &hdl->ctrls, node)
2462 ctrl->done = false;
2463
2464 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2465 struct v4l2_ctrl *master = ctrl->cluster[0];
2466 int i;
2467
2468 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2469 /* Skip button controls and read-only controls. */
2470 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2471 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2472 continue;
2473
2a863793
HV		 2474 for (i = 0; i < master->ncontrols; i++) {
2475 if (master->cluster[i]) {
2476 cur_to_new(master->cluster[i]);
2477 master->cluster[i]->is_new = 1;
71c6c4c9 2478 master->cluster[i]->done = true;
2a863793
HV		 2479 }
2480 }
54c911eb 2481 ret = call_op(master, s_ctrl);
0996517c
HV		 2482 if (ret)
2483 break;
0996517c 2484 }
cc0140e2
SA		 2485
2486 return ret;
2487}
2488EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
2489
2490int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2491{
2492 int ret;
2493
2494 if (hdl == NULL)
2495 return 0;
2496
2497 mutex_lock(hdl->lock);
2498 ret = __v4l2_ctrl_handler_setup(hdl);
77e7c4e6 2499 mutex_unlock(hdl->lock);
cc0140e2 2500
0996517c
HV		 2501 return ret;
2502}
2503EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2504
d9a25471
HV		 2505/* Implement VIDIOC_QUERY_EXT_CTRL */
2506int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2507{
d9a25471 2508 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2509 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2510 struct v4l2_ctrl_ref *ref;
2511 struct v4l2_ctrl *ctrl;
2512
2513 if (hdl == NULL)
2514 return -EINVAL;
2515
77e7c4e6 2516 mutex_lock(hdl->lock);
0996517c
HV		 2517
2518 /* Try to find it */
2519 ref = find_ref(hdl, id);
2520
d9a25471
HV		 2521 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2522 bool is_compound;
2523 /* Match any control that is not hidden */
2524 unsigned mask = 1;
2525 bool match = false;
2526
2527 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2528 /* Match any hidden control */
2529 match = true;
2530 } else if ((qc->id & next_flags) == next_flags) {
2531 /* Match any control, compound or not */
2532 mask = 0;
2533 }
2534
0996517c
HV		 2535 /* Find the next control with ID > qc->id */
2536
2537 /* Did we reach the end of the control list? */
2538 if (id >= node2id(hdl->ctrl_refs.prev)) {
2539 ref = NULL; /* Yes, so there is no next control */
2540 } else if (ref) {
2541 /* We found a control with the given ID, so just get
d9a25471
HV		 2542 the next valid one in the list. */
2543 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2544 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2545 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2546 if (id < ref->ctrl->id &&
2547 (is_compound & mask) == match)
2548 break;
2549 }
2550 if (&ref->node == &hdl->ctrl_refs)
2551 ref = NULL;
0996517c
HV		 2552 } else {
2553 /* No control with the given ID exists, so start
2554 searching for the next largest ID. We know there
2555 is one, otherwise the first 'if' above would have
2556 been true. */
d9a25471 2557 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2558 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2559 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2560 if (id < ref->ctrl->id &&
2561 (is_compound & mask) == match)
0996517c 2562 break;
d9a25471
HV		 2563 }
2564 if (&ref->node == &hdl->ctrl_refs)
2565 ref = NULL;
0996517c
HV		 2566 }
2567 }
77e7c4e6 2568 mutex_unlock(hdl->lock);
d9a25471 2569
0996517c
HV		 2570 if (!ref)
2571 return -EINVAL;
2572
2573 ctrl = ref->ctrl;
2574 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2575 if (id >= V4L2_CID_PRIVATE_BASE)
2576 qc->id = id;
2577 else
2578 qc->id = ctrl->id;
0996517c 2579 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2580 qc->flags = ctrl->flags;
2581 qc->type = ctrl->type;
2582 if (ctrl->is_ptr)
2583 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2584 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2585 qc->elems = ctrl->elems;
2586 qc->nr_of_dims = ctrl->nr_of_dims;
2587 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2588 qc->minimum = ctrl->minimum;
2589 qc->maximum = ctrl->maximum;
2590 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2591 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2592 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2593 qc->step = 1;
2594 else
2595 qc->step = ctrl->step;
d9a25471
HV		 2596 return 0;
2597}
2598EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2599
2600/* Implement VIDIOC_QUERYCTRL */
2601int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2602{
2603 struct v4l2_query_ext_ctrl qec = { qc->id };
2604 int rc;
2605
2606 rc = v4l2_query_ext_ctrl(hdl, &qec);
2607 if (rc)
2608 return rc;
2609
2610 qc->id = qec.id;
2611 qc->type = qec.type;
2612 qc->flags = qec.flags;
2613 strlcpy(qc->name, qec.name, sizeof(qc->name));
2614 switch (qc->type) {
2615 case V4L2_CTRL_TYPE_INTEGER:
2616 case V4L2_CTRL_TYPE_BOOLEAN:
2617 case V4L2_CTRL_TYPE_MENU:
2618 case V4L2_CTRL_TYPE_INTEGER_MENU:
2619 case V4L2_CTRL_TYPE_STRING:
2620 case V4L2_CTRL_TYPE_BITMASK:
2621 qc->minimum = qec.minimum;
2622 qc->maximum = qec.maximum;
2623 qc->step = qec.step;
2624 qc->default_value = qec.default_value;
2625 break;
2626 default:
2627 qc->minimum = 0;
2628 qc->maximum = 0;
2629 qc->step = 0;
2630 qc->default_value = 0;
2631 break;
2632 }
0996517c
HV		 2633 return 0;
2634}
2635EXPORT_SYMBOL(v4l2_queryctrl);
2636
0996517c
HV		 2637/* Implement VIDIOC_QUERYMENU */
2638int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2639{
2640 struct v4l2_ctrl *ctrl;
2641 u32 i = qm->index;
2642
2643 ctrl = v4l2_ctrl_find(hdl, qm->id);
2644 if (!ctrl)
2645 return -EINVAL;
2646
2647 qm->reserved = 0;
2648 /* Sanity checks */
ce580fe5
SA		 2649 switch (ctrl->type) {
2650 case V4L2_CTRL_TYPE_MENU:
2651 if (ctrl->qmenu == NULL)
2652 return -EINVAL;
2653 break;
2654 case V4L2_CTRL_TYPE_INTEGER_MENU:
2655 if (ctrl->qmenu_int == NULL)
2656 return -EINVAL;
2657 break;
2658 default:
2659 return -EINVAL;
2660 }
2661
2662 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2663 return -EINVAL;
ce580fe5 2664
0996517c
HV		 2665 /* Use mask to see if this menu item should be skipped */
2666 if (ctrl->menu_skip_mask & (1 << i))
2667 return -EINVAL;
2668 /* Empty menu items should also be skipped */
ce580fe5
SA		 2669 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2670 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2671 return -EINVAL;
2672 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2673 } else {
2674 qm->value = ctrl->qmenu_int[i];
2675 }
0996517c
HV		 2676 return 0;
2677}
2678EXPORT_SYMBOL(v4l2_querymenu);
2679
0996517c
HV		 2680
2681/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2682
2683 It is not a fully atomic operation, just best-effort only. After all, if
2684 multiple controls have to be set through multiple i2c writes (for example)
2685 then some initial writes may succeed while others fail. Thus leaving the
2686 system in an inconsistent state. The question is how much effort you are
2687 willing to spend on trying to make something atomic that really isn't.
2688
2689 From the point of view of an application the main requirement is that
2690 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2691 error should be returned without actually affecting any controls.
2692
2693 If all the values are correct, then it is acceptable to just give up
2694 in case of low-level errors.
2695
2696 It is important though that the application can tell when only a partial
2697 configuration was done. The way we do that is through the error_idx field
2698 of struct v4l2_ext_controls: if that is equal to the count field then no
2699 controls were affected. Otherwise all controls before that index were
2700 successful in performing their 'get' or 'set' operation, the control at
2701 the given index failed, and you don't know what happened with the controls
2702 after the failed one. Since if they were part of a control cluster they
2703 could have been successfully processed (if a cluster member was encountered
2704 at index < error_idx), they could have failed (if a cluster member was at
2705 error_idx), or they may not have been processed yet (if the first cluster
2706 member appeared after error_idx).
2707
2708 It is all fairly theoretical, though. In practice all you can do is to
2709 bail out. If error_idx == count, then it is an application bug. If
2710 error_idx < count then it is only an application bug if the error code was
2711 EBUSY. That usually means that something started streaming just when you
2712 tried to set the controls. In all other cases it is a driver/hardware
2713 problem and all you can do is to retry or bail out.
2714
2715 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2716 never modifies controls the error_idx is just set to whatever control
2717 has an invalid value.
2718 */
2719
2720/* Prepare for the extended g/s/try functions.
2721 Find the controls in the control array and do some basic checks. */
2722static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2723 struct v4l2_ext_controls *cs,
d9a25471
HV		 2724 struct v4l2_ctrl_helper *helpers,
2725 bool get)
0996517c 2726{
eb5b16ef
HV		 2727 struct v4l2_ctrl_helper *h;
2728 bool have_clusters = false;
0996517c
HV		 2729 u32 i;
2730
eb5b16ef 2731 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2732 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2733 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2734 struct v4l2_ctrl *ctrl;
2735 u32 id = c->id & V4L2_CTRL_ID_MASK;
2736
37cd3b73 2737 cs->error_idx = i;
0996517c 2738
953eae5d
RRD		 2739 if (cs->which &&
2740 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
2741 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 2742 return -EINVAL;
2743
2744 /* Old-style private controls are not allowed for
2745 extended controls */
2746 if (id >= V4L2_CID_PRIVATE_BASE)
2747 return -EINVAL;
eb5b16ef
HV		 2748 ref = find_ref_lock(hdl, id);
2749 if (ref == NULL)
0996517c 2750 return -EINVAL;
eb5b16ef 2751 ctrl = ref->ctrl;
0996517c
HV		 2752 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2753 return -EINVAL;
2754
eb5b16ef
HV		 2755 if (ctrl->cluster[0]->ncontrols > 1)
2756 have_clusters = true;
2757 if (ctrl->cluster[0] != ctrl)
2758 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2759 if (ctrl->is_ptr && !ctrl->is_string) {
2760 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2761
2762 if (c->size < tot_size) {
2763 if (get) {
2764 c->size = tot_size;
2765 return -ENOSPC;
2766 }
2767 return -EFAULT;
d9a25471 2768 }
302ab7ce 2769 c->size = tot_size;
d9a25471 2770 }
eb5b16ef
HV		 2771 /* Store the ref to the master control of the cluster */
2772 h->mref = ref;
2773 h->ctrl = ctrl;
2774 /* Initially set next to 0, meaning that there is no other
2775 control in this helper array belonging to the same
2776 cluster */
2777 h->next = 0;
0996517c 2778 }
0996517c 2779
eb5b16ef
HV		 2780 /* We are done if there were no controls that belong to a multi-
2781 control cluster. */
2782 if (!have_clusters)
2783 return 0;
0996517c 2784
eb5b16ef
HV		 2785 /* The code below figures out in O(n) time which controls in the list
2786 belong to the same cluster. */
0996517c 2787
eb5b16ef 2788 /* This has to be done with the handler lock taken. */
77e7c4e6 2789 mutex_lock(hdl->lock);
0996517c 2790
eb5b16ef
HV		 2791 /* First zero the helper field in the master control references */
2792 for (i = 0; i < cs->count; i++)
c082266f 2793 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2794 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2795 struct v4l2_ctrl_ref *mref = h->mref;
2796
2797 /* If the mref->helper is set, then it points to an earlier
2798 helper that belongs to the same cluster. */
2799 if (mref->helper) {
2800 /* Set the next field of mref->helper to the current
2801 index: this means that that earlier helper now
2802 points to the next helper in the same cluster. */
2803 mref->helper->next = i;
2804 /* mref should be set only for the first helper in the
2805 cluster, clear the others. */
2806 h->mref = NULL;
2807 }
2808 /* Point the mref helper to the current helper struct. */
2809 mref->helper = h;
0996517c 2810 }
77e7c4e6 2811 mutex_unlock(hdl->lock);
eb5b16ef 2812 return 0;
0996517c
HV		 2813}
2814
2815/* Handles the corner case where cs->count == 0. It checks whether the
2816 specified control class exists. If that class ID is 0, then it checks
2817 whether there are any controls at all. */
0f8017be 2818static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 2819{
953eae5d 2820 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL)
0996517c 2821 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
0f8017be 2822 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 2823}
2824
2825
2826
2827/* Get extended controls. Allocates the helpers array if needed. */
2828int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2829{
eb5b16ef
HV		 2830 struct v4l2_ctrl_helper helper[4];
2831 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2832 int ret;
ddac5c10 2833 int i, j;
953eae5d
RRD		 2834 bool def_value;
2835
2836 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 2837
2838 cs->error_idx = cs->count;
0f8017be 2839 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 2840
2841 if (hdl == NULL)
2842 return -EINVAL;
2843
2844 if (cs->count == 0)
0f8017be 2845 return class_check(hdl, cs->which);
0996517c
HV		 2846
2847 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 2848 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
2849 GFP_KERNEL);
0996517c
HV		 2850 if (helpers == NULL)
2851 return -ENOMEM;
2852 }
2853
d9a25471 2854 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2855 cs->error_idx = cs->count;
0996517c
HV		 2856
2857 for (i = 0; !ret && i < cs->count; i++)
2858 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2859 ret = -EACCES;
2860
2861 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 2862 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 2863 struct v4l2_ctrl *ctrl);
eb5b16ef 2864 struct v4l2_ctrl *master;
0996517c 2865
953eae5d
RRD		 2866 ctrl_to_user = def_value ? def_to_user : cur_to_user;
2867
eb5b16ef 2868 if (helpers[i].mref == NULL)
0996517c
HV		 2869 continue;
2870
eb5b16ef 2871 master = helpers[i].mref->ctrl;
0996517c
HV		 2872 cs->error_idx = i;
2873
2874 v4l2_ctrl_lock(master);
ddac5c10
HV		 2875
2876 /* g_volatile_ctrl will update the new control values */
953eae5d
RRD		 2877 if (!def_value &&
2878 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2879 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 2880 for (j = 0; j < master->ncontrols; j++)
2881 cur_to_new(master->cluster[j]);
54c911eb 2882 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2883 ctrl_to_user = new_to_user;
ddac5c10
HV		 2884 }
2885 /* If OK, then copy the current (for non-volatile controls)
2886 or the new (for volatile controls) control values to the
2887 caller */
eb5b16ef
HV		 2888 if (!ret) {
2889 u32 idx = i;
2890
2891 do {
2892 ret = ctrl_to_user(cs->controls + idx,
2893 helpers[idx].ctrl);
2894 idx = helpers[idx].next;
2895 } while (!ret && idx);
2896 }
0996517c 2897 v4l2_ctrl_unlock(master);
0996517c
HV		 2898 }
2899
2900 if (cs->count > ARRAY_SIZE(helper))
758d90e1 2901 kvfree(helpers);
0996517c
HV		 2902 return ret;
2903}
2904EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2905
0996517c 2906/* Helper function to get a single control */
03d5285b 2907static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2908{
2909 struct v4l2_ctrl *master = ctrl->cluster[0];
2910 int ret = 0;
ddac5c10 2911 int i;
0996517c 2912
d9a25471 2913 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2914 * cur_to_user() calls below would need to be modified not to access
2915 * userspace memory when called from get_ctrl().
2916 */
a8077734 2917 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 2918 return -EINVAL;
2919
0996517c
HV		 2920 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2921 return -EACCES;
2922
2923 v4l2_ctrl_lock(master);
2924 /* g_volatile_ctrl will update the current control values */
5626b8c7 2925 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2926 for (i = 0; i < master->ncontrols; i++)
2927 cur_to_new(master->cluster[i]);
54c911eb 2928 ret = call_op(master, g_volatile_ctrl);
03d5285b 2929 new_to_user(c, ctrl);
ddac5c10 2930 } else {
03d5285b 2931 cur_to_user(c, ctrl);
ddac5c10 2932 }
0996517c
HV		 2933 v4l2_ctrl_unlock(master);
2934 return ret;
2935}
2936
2937int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2938{
2939 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2940 struct v4l2_ext_control c;
2941 int ret;
0996517c 2942
d9a25471 2943 if (ctrl == NULL || !ctrl->is_int)
0996517c 2944 return -EINVAL;
03d5285b
LP		 2945 ret = get_ctrl(ctrl, &c);
2946 control->value = c.value;
2947 return ret;
0996517c
HV		 2948}
2949EXPORT_SYMBOL(v4l2_g_ctrl);
2950
0996517c
HV		 2951s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2952{
03d5285b 2953 struct v4l2_ext_control c;
0996517c
HV		 2954
2955 /* It's a driver bug if this happens. */
d9a25471 2956 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2957 c.value = 0;
2958 get_ctrl(ctrl, &c);
2959 return c.value;
0996517c
HV		 2960}
2961EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2962
03d5285b
LP		 2963s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2964{
2965 struct v4l2_ext_control c;
2966
2967 /* It's a driver bug if this happens. */
998e7659 2968 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 2969 c.value64 = 0;
03d5285b 2970 get_ctrl(ctrl, &c);
a8077734 2971 return c.value64;
03d5285b
LP		 2972}
2973EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2974
0996517c
HV		 2975
2976/* Core function that calls try/s_ctrl and ensures that the new value is
2977 copied to the current value on a set.
2978 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2979static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2980 bool set, u32 ch_flags)
0996517c 2981{
72d877ca 2982 bool update_flag;
eb5b16ef 2983 int ret;
0996517c
HV		 2984 int i;
2985
2986 /* Go through the cluster and either validate the new value or
2987 (if no new value was set), copy the current value to the new
2988 value, ensuring a consistent view for the control ops when
2989 called. */
eb5b16ef 2990 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2991 struct v4l2_ctrl *ctrl = master->cluster[i];
2992
2993 if (ctrl == NULL)
2994 continue;
2995
eb5b16ef
HV		 2996 if (!ctrl->is_new) {
2997 cur_to_new(ctrl);
0996517c
HV		 2998 continue;
2999 }
eb5b16ef
HV		 3000 /* Check again: it may have changed since the
3001 previous check in try_or_set_ext_ctrls(). */
3002 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3003 return -EBUSY;
0996517c
HV		 3004 }
3005
eb5b16ef 3006 ret = call_op(master, try_ctrl);
0996517c
HV		 3007
3008 /* Don't set if there is no change */
72d877ca
HV		 3009 if (ret || !set || !cluster_changed(master))
3010 return ret;
3011 ret = call_op(master, s_ctrl);
72d877ca
HV		 3012 if (ret)
3013 return ret;
3014
eb5b16ef 3015 /* If OK, then make the new values permanent. */
72d877ca
HV		 3016 update_flag = is_cur_manual(master) != is_new_manual(master);
3017 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 3018 new_to_cur(fh, master->cluster[i], ch_flags |
3019 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 3020 return 0;
0996517c
HV		 3021}
3022
e6402585
HV		 3023/* Validate controls. */
3024static int validate_ctrls(struct v4l2_ext_controls *cs,
3025 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3026{
e6402585 3027 unsigned i;
0996517c
HV		 3028 int ret = 0;
3029
eb5b16ef 3030 cs->error_idx = cs->count;
0996517c
HV		 3031 for (i = 0; i < cs->count; i++) {
3032 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3033 union v4l2_ctrl_ptr p_new;
0996517c 3034
e6402585 3035 cs->error_idx = i;
0996517c
HV		 3036
3037 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3038 return -EACCES;
3039 /* This test is also done in try_set_control_cluster() which
3040 is called in atomic context, so that has the final say,
3041 but it makes sense to do an up-front check as well. Once
3042 an error occurs in try_set_control_cluster() some other
3043 controls may have been set already and we want to do a
3044 best-effort to avoid that. */
3045 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3046 return -EBUSY;
7a7f1ab3
HV		 3047 /*
3048 * Skip validation for now if the payload needs to be copied
3049 * from userspace into kernelspace. We'll validate those later.
3050 */
3051 if (ctrl->is_ptr)
3052 continue;
3053 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3054 p_new.p_s64 = &cs->controls[i].value64;
3055 else
3056 p_new.p_s32 = &cs->controls[i].value;
3057 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3058 if (ret)
3059 return ret;
0996517c 3060 }
e6402585
HV		 3061 return 0;
3062}
3063
5626b8c7
HV		 3064/* Obtain the current volatile values of an autocluster and mark them
3065 as new. */
3066static void update_from_auto_cluster(struct v4l2_ctrl *master)
3067{
3068 int i;
3069
759b26a1 3070 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3071 cur_to_new(master->cluster[i]);
3072 if (!call_op(master, g_volatile_ctrl))
3073 for (i = 1; i < master->ncontrols; i++)
3074 if (master->cluster[i])
3075 master->cluster[i]->is_new = 1;
3076}
3077
e6402585
HV		 3078/* Try or try-and-set controls */
3079static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3080 struct v4l2_ext_controls *cs,
3081 bool set)
3082{
3083 struct v4l2_ctrl_helper helper[4];
3084 struct v4l2_ctrl_helper *helpers = helper;
3085 unsigned i, j;
3086 int ret;
3087
3088 cs->error_idx = cs->count;
953eae5d
RRD		 3089
3090 /* Default value cannot be changed */
3091 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3092 return -EINVAL;
3093
0f8017be 3094 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3095
3096 if (hdl == NULL)
3097 return -EINVAL;
3098
3099 if (cs->count == 0)
0f8017be 3100 return class_check(hdl, cs->which);
0996517c 3101
e6402585 3102 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3103 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3104 GFP_KERNEL);
e6402585
HV		 3105 if (!helpers)
3106 return -ENOMEM;
3107 }
d9a25471 3108 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3109 if (!ret)
3110 ret = validate_ctrls(cs, helpers, set);
3111 if (ret && set)
3112 cs->error_idx = cs->count;
0996517c 3113 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3114 struct v4l2_ctrl *master;
3115 u32 idx = i;
0996517c 3116
eb5b16ef 3117 if (helpers[i].mref == NULL)
0996517c
HV		 3118 continue;
3119
37cd3b73 3120 cs->error_idx = i;
eb5b16ef
HV		 3121 master = helpers[i].mref->ctrl;
3122 v4l2_ctrl_lock(master);
0996517c 3123
2a863793 3124 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3125 for (j = 0; j < master->ncontrols; j++)
3126 if (master->cluster[j])
2a863793 3127 master->cluster[j]->is_new = 0;
0996517c 3128
5626b8c7
HV		 3129 /* For volatile autoclusters that are currently in auto mode
3130 we need to discover if it will be set to manual mode.
3131 If so, then we have to copy the current volatile values
3132 first since those will become the new manual values (which
3133 may be overwritten by explicit new values from this set
3134 of controls). */
3135 if (master->is_auto && master->has_volatiles &&
3136 !is_cur_manual(master)) {
3137 /* Pick an initial non-manual value */
3138 s32 new_auto_val = master->manual_mode_value + 1;
3139 u32 tmp_idx = idx;
3140
3141 do {
3142 /* Check if the auto control is part of the
3143 list, and remember the new value. */
3144 if (helpers[tmp_idx].ctrl == master)
3145 new_auto_val = cs->controls[tmp_idx].value;
3146 tmp_idx = helpers[tmp_idx].next;
3147 } while (tmp_idx);
3148 /* If the new value == the manual value, then copy
3149 the current volatile values. */
3150 if (new_auto_val == master->manual_mode_value)
3151 update_from_auto_cluster(master);
3152 }
3153
0996517c 3154 /* Copy the new caller-supplied control values.
2a863793 3155 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3156 do {
7a7f1ab3
HV		 3157 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3158
3159 ret = user_to_new(cs->controls + idx, ctrl);
3160 if (!ret && ctrl->is_ptr)
3161 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3162 idx = helpers[idx].next;
3163 } while (!ret && idx);
0996517c
HV		 3164
3165 if (!ret)
2ccbe779 3166 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3167
3168 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3169 if (!ret) {
3170 idx = i;
3171 do {
adf41b9b 3172 ret = new_to_user(cs->controls + idx,
e6402585 3173 helpers[idx].ctrl);
eb5b16ef
HV		 3174 idx = helpers[idx].next;
3175 } while (!ret && idx);
3176 }
3177 v4l2_ctrl_unlock(master);
0996517c 3178 }
0996517c 3179
0996517c 3180 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3181 kvfree(helpers);
0996517c
HV		 3182 return ret;
3183}
3184
3185int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3186{
ab892bac 3187 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3188}
3189EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3190
ab892bac
HV		 3191int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3192 struct v4l2_ext_controls *cs)
0996517c 3193{
ab892bac 3194 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3195}
3196EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3197
0996517c 3198/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3199static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3200{
3201 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3202 int ret;
0996517c
HV		 3203 int i;
3204
2a863793 3205 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3206 for (i = 0; i < master->ncontrols; i++)
3207 if (master->cluster[i])
2a863793 3208 master->cluster[i]->is_new = 0;
0996517c 3209
7a7f1ab3
HV		 3210 ret = validate_new(ctrl, ctrl->p_new);
3211 if (ret)
3212 return ret;
5d0360a4 3213
5626b8c7
HV		 3214 /* For autoclusters with volatiles that are switched from auto to
3215 manual mode we have to update the current volatile values since
3216 those will become the initial manual values after such a switch. */
3217 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3218 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3219 update_from_auto_cluster(master);
03d5285b 3220
5d0360a4 3221 ctrl->is_new = 1;
2ccbe779
SN		 3222 return try_or_set_cluster(fh, master, true, ch_flags);
3223}
03d5285b 3224
2ccbe779
SN		 3225/* Helper function for VIDIOC_S_CTRL compatibility */
3226static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3227 struct v4l2_ext_control *c)
3228{
7a7f1ab3 3229 int ret;
2ccbe779 3230
7a7f1ab3
HV		 3231 v4l2_ctrl_lock(ctrl);
3232 user_to_new(c, ctrl);
3233 ret = set_ctrl(fh, ctrl, 0);
3234 if (!ret)
3235 cur_to_user(c, ctrl);
3236 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3237 return ret;
3238}
3239
ab892bac
HV		 3240int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3241 struct v4l2_control *control)
0996517c
HV		 3242{
3243 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3244 struct v4l2_ext_control c = { control->id };
03d5285b 3245 int ret;
0996517c 3246
d9a25471 3247 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3248 return -EINVAL;
3249
7ebbc39f
HV		 3250 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3251 return -EACCES;
3252
03d5285b 3253 c.value = control->value;
2ccbe779 3254 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3255 control->value = c.value;
3256 return ret;
0996517c
HV		 3257}
3258EXPORT_SYMBOL(v4l2_s_ctrl);
3259
0c4348ad 3260int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3261{
0c4348ad 3262 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3263
0996517c 3264 /* It's a driver bug if this happens. */
d9a25471 3265 WARN_ON(!ctrl->is_int);
5d0360a4 3266 ctrl->val = val;
7a7f1ab3 3267 return set_ctrl(NULL, ctrl, 0);
0996517c 3268}
0c4348ad 3269EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3270
0c4348ad 3271int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3272{
0c4348ad 3273 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3274
3275 /* It's a driver bug if this happens. */
998e7659 3276 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3277 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3278 return set_ctrl(NULL, ctrl, 0);
03d5285b 3279}
0c4348ad 3280EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3281
5d0360a4
HV		 3282int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3283{
3284 lockdep_assert_held(ctrl->handler->lock);
3285
3286 /* It's a driver bug if this happens. */
3287 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3288 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3289 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3290}
3291EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3292
8ac7a949
HV		 3293void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3294{
3295 if (ctrl == NULL)
3296 return;
3297 if (notify == NULL) {
3298 ctrl->call_notify = 0;
3299 return;
3300 }
3301 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3302 return;
3303 ctrl->handler->notify = notify;
3304 ctrl->handler->notify_priv = priv;
3305 ctrl->call_notify = 1;
3306}
3307EXPORT_SYMBOL(v4l2_ctrl_notify);
3308
5a573925 3309int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3310 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3311{
95ad7ff3
RRD		 3312 bool value_changed;
3313 bool range_changed = false;
302ab7ce 3314 int ret;
2ccbe779 3315
5a573925
SA		 3316 lockdep_assert_held(ctrl->handler->lock);
3317
2ccbe779
SN		 3318 switch (ctrl->type) {
3319 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3320 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3321 case V4L2_CTRL_TYPE_BOOLEAN:
3322 case V4L2_CTRL_TYPE_MENU:
3323 case V4L2_CTRL_TYPE_INTEGER_MENU:
3324 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3325 case V4L2_CTRL_TYPE_U8:
3326 case V4L2_CTRL_TYPE_U16:
811c5081 3327 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3328 if (ctrl->is_array)
3329 return -EINVAL;
3330 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3331 if (ret)
3332 return ret;
3333 break;
3334 default:
3335 return -EINVAL;
3336 }
95ad7ff3
RRD		 3337 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
3338 (ctrl->step != step) || ctrl->default_value != def) {
3339 range_changed = true;
3340 ctrl->minimum = min;
3341 ctrl->maximum = max;
3342 ctrl->step = step;
3343 ctrl->default_value = def;
3344 }
7a7f1ab3
HV		 3345 cur_to_new(ctrl);
3346 if (validate_new(ctrl, ctrl->p_new)) {
3347 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3348 *ctrl->p_new.p_s64 = def;
3349 else
3350 *ctrl->p_new.p_s32 = def;
3351 }
3352
3353 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 3354 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 3355 else
95ad7ff3
RRD		 3356 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3357 if (value_changed)
7a7f1ab3 3358 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 3359 else if (range_changed)
2ccbe779 3360 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3361 return ret;
3362}
5a573925 3363EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3364
6e6d76cd 3365static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3366{
3e366149
HG		 3367 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3368
3369 if (ctrl == NULL)
3370 return -EINVAL;
3371
6e239399 3372 v4l2_ctrl_lock(ctrl);
77068d36 3373 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3374 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3375 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3376 struct v4l2_event ev;
c12fcfd6 3377 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3378
c12fcfd6
HV		 3379 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3380 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3381 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3382 /* Mark the queue as active, allowing this initial
3383 event to be accepted. */
3384 sev->elems = elems;
77068d36 3385 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3386 }
3387 v4l2_ctrl_unlock(ctrl);
3e366149 3388 return 0;
6e239399 3389}
6e239399 3390
3e366149 3391static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3392{
3e366149
HG		 3393 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3394
814e92b8
HV		 3395 if (ctrl == NULL)
3396 return;
3397
6e239399 3398 v4l2_ctrl_lock(ctrl);
77068d36 3399 list_del(&sev->node);
6e239399
HV		 3400 v4l2_ctrl_unlock(ctrl);
3401}
3e366149
HG		 3402
3403void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3404{
3405 u32 old_changes = old->u.ctrl.changes;
3406
3407 old->u.ctrl = new->u.ctrl;
3408 old->u.ctrl.changes |= old_changes;
3409}
3410EXPORT_SYMBOL(v4l2_ctrl_replace);
3411
3412void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3413{
3414 new->u.ctrl.changes |= old->u.ctrl.changes;
3415}
3416EXPORT_SYMBOL(v4l2_ctrl_merge);
3417
3418const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3419 .add = v4l2_ctrl_add_event,
3420 .del = v4l2_ctrl_del_event,
3421 .replace = v4l2_ctrl_replace,
3422 .merge = v4l2_ctrl_merge,
3423};
3424EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3425
3426int v4l2_ctrl_log_status(struct file *file, void *fh)
3427{
3428 struct video_device *vfd = video_devdata(file);
3429 struct v4l2_fh *vfh = file->private_data;
3430
3431 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3432 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3433 vfd->v4l2_dev->name);
3434 return 0;
3435}
3436EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3437
3438int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3439 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3440{
3441 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3442 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3443 return -EINVAL;
3444}
3445EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3446
22fa4279
SN		 3447int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3448 struct v4l2_event_subscription *sub)
3449{
3450 if (!sd->ctrl_handler)
3451 return -EINVAL;
3452 return v4l2_ctrl_subscribe_event(fh, sub);
3453}
3454EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3455
a26243b0
HV		 3456unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3457{
3458 struct v4l2_fh *fh = file->private_data;
3459
3460 if (v4l2_event_pending(fh))
3461 return POLLPRI;
3462 poll_wait(file, &fh->wait, wait);
3463 return 0;
3464}
3465EXPORT_SYMBOL(v4l2_ctrl_poll);
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