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media: v4l2: Documentation of HEVC compressed format
[linux-block.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
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
RR		 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
RR		 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
9cac9d2f
RR		 1230static u32 user_flags(const struct v4l2_ctrl *ctrl)
1231{
1232 u32 flags = ctrl->flags;
1233
1234 if (ctrl->is_ptr)
1235 flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
1236
1237 return flags;
1238}
1239
6e239399
HV		 1240static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1241{
1242 memset(ev->reserved, 0, sizeof(ev->reserved));
1243 ev->type = V4L2_EVENT_CTRL;
1244 ev->id = ctrl->id;
1245 ev->u.ctrl.changes = changes;
1246 ev->u.ctrl.type = ctrl->type;
9cac9d2f 1247 ev->u.ctrl.flags = user_flags(ctrl);
d9a25471 1248 if (ctrl->is_ptr)
6e239399
HV		 1249 ev->u.ctrl.value64 = 0;
1250 else
2a9ec373 1251 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1252 ev->u.ctrl.minimum = ctrl->minimum;
1253 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1254 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1255 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1256 ev->u.ctrl.step = 1;
1257 else
1258 ev->u.ctrl.step = ctrl->step;
1259 ev->u.ctrl.default_value = ctrl->default_value;
1260}
1261
1262static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1263{
1264 struct v4l2_event ev;
77068d36 1265 struct v4l2_subscribed_event *sev;
6e239399 1266
77068d36 1267 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1268 return;
6e239399
HV		 1269 fill_event(&ev, ctrl, changes);
1270
77068d36 1271 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1272 if (sev->fh != fh ||
1273 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1274 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1275}
1276
998e7659 1277static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1278 union v4l2_ctrl_ptr ptr1,
1279 union v4l2_ctrl_ptr ptr2)
1280{
1281 switch (ctrl->type) {
1282 case V4L2_CTRL_TYPE_BUTTON:
1283 return false;
1284 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1285 idx *= ctrl->elem_size;
0176077a 1286 /* strings are always 0-terminated */
265c7f8a 1287 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1288 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1289 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1290 case V4L2_CTRL_TYPE_U8:
1291 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1292 case V4L2_CTRL_TYPE_U16:
1293 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1294 case V4L2_CTRL_TYPE_U32:
1295 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1296 default:
265c7f8a
HV		 1297 if (ctrl->is_int)
1298 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1299 idx *= ctrl->elem_size;
1300 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1301 }
1302}
1303
998e7659 1304static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1305 union v4l2_ctrl_ptr ptr)
1306{
1307 switch (ctrl->type) {
1308 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1309 idx *= ctrl->elem_size;
1310 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1311 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1312 break;
1313 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1314 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1315 break;
1316 case V4L2_CTRL_TYPE_INTEGER:
1317 case V4L2_CTRL_TYPE_INTEGER_MENU:
1318 case V4L2_CTRL_TYPE_MENU:
1319 case V4L2_CTRL_TYPE_BITMASK:
1320 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1321 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1322 break;
dda4a4d5
HV		 1323 case V4L2_CTRL_TYPE_U8:
1324 ptr.p_u8[idx] = ctrl->default_value;
1325 break;
1326 case V4L2_CTRL_TYPE_U16:
1327 ptr.p_u16[idx] = ctrl->default_value;
1328 break;
811c5081
HV		 1329 case V4L2_CTRL_TYPE_U32:
1330 ptr.p_u32[idx] = ctrl->default_value;
1331 break;
0176077a 1332 default:
302ab7ce
HV		 1333 idx *= ctrl->elem_size;
1334 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1335 break;
1336 }
1337}
1338
1339static void std_log(const struct v4l2_ctrl *ctrl)
1340{
1341 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1342
998e7659
HV		 1343 if (ctrl->is_array) {
1344 unsigned i;
1345
1346 for (i = 0; i < ctrl->nr_of_dims; i++)
1347 pr_cont("[%u]", ctrl->dims[i]);
1348 pr_cont(" ");
1349 }
1350
0176077a
HV		 1351 switch (ctrl->type) {
1352 case V4L2_CTRL_TYPE_INTEGER:
1353 pr_cont("%d", *ptr.p_s32);
1354 break;
1355 case V4L2_CTRL_TYPE_BOOLEAN:
1356 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1357 break;
1358 case V4L2_CTRL_TYPE_MENU:
1359 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1360 break;
1361 case V4L2_CTRL_TYPE_INTEGER_MENU:
1362 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1363 break;
1364 case V4L2_CTRL_TYPE_BITMASK:
1365 pr_cont("0x%08x", *ptr.p_s32);
1366 break;
1367 case V4L2_CTRL_TYPE_INTEGER64:
1368 pr_cont("%lld", *ptr.p_s64);
1369 break;
1370 case V4L2_CTRL_TYPE_STRING:
1371 pr_cont("%s", ptr.p_char);
1372 break;
dda4a4d5
HV		 1373 case V4L2_CTRL_TYPE_U8:
1374 pr_cont("%u", (unsigned)*ptr.p_u8);
1375 break;
1376 case V4L2_CTRL_TYPE_U16:
1377 pr_cont("%u", (unsigned)*ptr.p_u16);
1378 break;
811c5081
HV		 1379 case V4L2_CTRL_TYPE_U32:
1380 pr_cont("%u", (unsigned)*ptr.p_u32);
1381 break;
0176077a
HV		 1382 default:
1383 pr_cont("unknown type %d", ctrl->type);
1384 break;
1385 }
1386}
1387
958c7c7e
HV		 1388/*
1389 * Round towards the closest legal value. Be careful when we are
1390 * close to the maximum range of the control type to prevent
1391 * wrap-arounds.
1392 */
0176077a
HV		 1393#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1394({ \
1395 offset_type offset; \
958c7c7e 1396 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1397 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1398 val = (ctrl)->maximum; \
1399 else \
9c9cb1fa 1400 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1401 val = clamp_t(typeof(val), val, \
1402 (ctrl)->minimum, (ctrl)->maximum); \
1403 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1404 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1405 val = (ctrl)->minimum + offset; \
1406 0; \
1407})
1408
1409/* Validate a new control */
998e7659 1410static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1411 union v4l2_ctrl_ptr ptr)
1412{
1413 size_t len;
0d5e8c43
HV		 1414 u64 offset;
1415 s64 val;
0176077a
HV		 1416
1417 switch (ctrl->type) {
1418 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1419 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1420 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1421 /*
1422 * We can't use the ROUND_TO_RANGE define here due to
1423 * the u64 divide that needs special care.
1424 */
1425 val = ptr.p_s64[idx];
9c9cb1fa 1426 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1427 val = ctrl->maximum;
1428 else
9c9cb1fa 1429 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1430 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1431 offset = val - ctrl->minimum;
1432 do_div(offset, ctrl->step);
1433 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1434 return 0;
dda4a4d5
HV		 1435 case V4L2_CTRL_TYPE_U8:
1436 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1437 case V4L2_CTRL_TYPE_U16:
1438 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1439 case V4L2_CTRL_TYPE_U32:
1440 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1441
1442 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1443 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1444 return 0;
1445
1446 case V4L2_CTRL_TYPE_MENU:
1447 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1448 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1449 return -ERANGE;
265c7f8a 1450 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1451 return -EINVAL;
1452 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1453 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1454 return -EINVAL;
1455 return 0;
1456
1457 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1458 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1459 return 0;
1460
1461 case V4L2_CTRL_TYPE_BUTTON:
1462 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1463 ptr.p_s32[idx] = 0;
0176077a
HV		 1464 return 0;
1465
1466 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1467 idx *= ctrl->elem_size;
1468 len = strlen(ptr.p_char + idx);
0176077a
HV		 1469 if (len < ctrl->minimum)
1470 return -ERANGE;
0d5e8c43 1471 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1472 return -ERANGE;
1473 return 0;
1474
1475 default:
1476 return -EINVAL;
1477 }
1478}
1479
1480static const struct v4l2_ctrl_type_ops std_type_ops = {
1481 .equal = std_equal,
1482 .init = std_init,
1483 .log = std_log,
1484 .validate = std_validate,
1485};
1486
000e4f9a
HV		 1487/* Helper function: copy the given control value back to the caller */
1488static int ptr_to_user(struct v4l2_ext_control *c,
1489 struct v4l2_ctrl *ctrl,
1490 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1491{
1492 u32 len;
1493
d9a25471 1494 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1495 return copy_to_user(c->ptr, ptr.p, c->size) ?
1496 -EFAULT : 0;
d9a25471 1497
0996517c
HV		 1498 switch (ctrl->type) {
1499 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1500 len = strlen(ptr.p_char);
0996517c 1501 if (c->size < len + 1) {
c336f75e 1502 c->size = ctrl->elem_size;
0996517c
HV		 1503 return -ENOSPC;
1504 }
000e4f9a 1505 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1506 -EFAULT : 0;
0996517c 1507 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1508 c->value64 = *ptr.p_s64;
0996517c
HV		 1509 break;
1510 default:
000e4f9a 1511 c->value = *ptr.p_s32;
0996517c
HV		 1512 break;
1513 }
1514 return 0;
1515}
1516
000e4f9a
HV		 1517/* Helper function: copy the current control value back to the caller */
1518static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1519 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1520{
1521 return ptr_to_user(c, ctrl, ctrl->p_cur);
1522}
1523
1524/* Helper function: copy the new control value back to the caller */
1525static int new_to_user(struct v4l2_ext_control *c,
1526 struct v4l2_ctrl *ctrl)
1527{
1528 return ptr_to_user(c, ctrl, ctrl->p_new);
1529}
1530
953eae5d
RR		 1531/* Helper function: copy the initial control value back to the caller */
1532static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1533{
1534 int idx;
1535
1536 for (idx = 0; idx < ctrl->elems; idx++)
1537 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1538
1539 return ptr_to_user(c, ctrl, ctrl->p_new);
1540}
1541
000e4f9a
HV		 1542/* Helper function: copy the caller-provider value to the given control value */
1543static int user_to_ptr(struct v4l2_ext_control *c,
1544 struct v4l2_ctrl *ctrl,
1545 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1546{
1547 int ret;
1548 u32 size;
1549
2a863793 1550 ctrl->is_new = 1;
302ab7ce
HV		 1551 if (ctrl->is_ptr && !ctrl->is_string) {
1552 unsigned idx;
1553
40265bbe 1554 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1555 if (ret || !ctrl->is_array)
1556 return ret;
1557 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1558 ctrl->type_ops->init(ctrl, idx, ptr);
1559 return 0;
1560 }
d9a25471 1561
0996517c
HV		 1562 switch (ctrl->type) {
1563 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1564 *ptr.p_s64 = c->value64;
0996517c
HV		 1565 break;
1566 case V4L2_CTRL_TYPE_STRING:
1567 size = c->size;
1568 if (size == 0)
1569 return -ERANGE;
1570 if (size > ctrl->maximum + 1)
1571 size = ctrl->maximum + 1;
40265bbe 1572 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1573 if (!ret) {
000e4f9a 1574 char last = ptr.p_char[size - 1];
0996517c 1575
000e4f9a 1576 ptr.p_char[size - 1] = 0;
0996517c
HV		 1577 /* If the string was longer than ctrl->maximum,
1578 then return an error. */
000e4f9a 1579 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1580 return -ERANGE;
1581 }
40265bbe 1582 return ret;
0996517c 1583 default:
000e4f9a 1584 *ptr.p_s32 = c->value;
0996517c
HV		 1585 break;
1586 }
1587 return 0;
1588}
1589
000e4f9a
HV		 1590/* Helper function: copy the caller-provider value as the new control value */
1591static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1592 struct v4l2_ctrl *ctrl)
1593{
000e4f9a
HV		 1594 return user_to_ptr(c, ctrl, ctrl->p_new);
1595}
d9a25471 1596
000e4f9a
HV		 1597/* Copy the one value to another. */
1598static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1599 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1600{
1601 if (ctrl == NULL)
1602 return;
302ab7ce 1603 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1604}
1605
1606/* Copy the new value to the current value. */
2ccbe779 1607static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1608{
000e4f9a 1609 bool changed;
6e239399 1610
0996517c
HV		 1611 if (ctrl == NULL)
1612 return;
9ea1b7a4
HV		 1613
1614 /* has_changed is set by cluster_changed */
1615 changed = ctrl->has_changed;
1616 if (changed)
1617 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1618
2ccbe779
SN		 1619 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1620 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1621 ctrl->flags &=
1622 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1623 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1624 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1625 if (ctrl->cluster[0]->has_volatiles)
1626 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1627 }
1249a3a8 1628 fh = NULL;
72d877ca 1629 }
2ccbe779 1630 if (changed || ch_flags) {
639884a6
HV		 1631 /* If a control was changed that was not one of the controls
1632 modified by the application, then send the event to all. */
1633 if (!ctrl->is_new)
1634 fh = NULL;
6e239399 1635 send_event(fh, ctrl,
2ccbe779 1636 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1637 if (ctrl->call_notify && changed && ctrl->handler->notify)
1638 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1639 }
0996517c
HV		 1640}
1641
1642/* Copy the current value to the new value */
1643static void cur_to_new(struct v4l2_ctrl *ctrl)
1644{
1645 if (ctrl == NULL)
1646 return;
000e4f9a 1647 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1648}
1649
1650/* Return non-zero if one or more of the controls in the cluster has a new
1651 value that differs from the current value. */
1652static int cluster_changed(struct v4l2_ctrl *master)
1653{
9ea1b7a4 1654 bool changed = false;
302ab7ce 1655 unsigned idx;
0996517c
HV		 1656 int i;
1657
9ea1b7a4 1658 for (i = 0; i < master->ncontrols; i++) {
0996517c 1659 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1660 bool ctrl_changed = false;
0996517c
HV		 1661
1662 if (ctrl == NULL)
1663 continue;
45f014c5
RR		 1664
1665 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1666 changed = ctrl_changed = true;
1667
b08d8d26
RR		 1668 /*
1669 * Set has_changed to false to avoid generating
1670 * the event V4L2_EVENT_CTRL_CH_VALUE
1671 */
1672 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1673 ctrl->has_changed = false;
1674 continue;
1675 }
1676
302ab7ce
HV		 1677 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1678 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1679 ctrl->p_cur, ctrl->p_new);
302ab7ce 1680 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1681 changed |= ctrl->has_changed;
0996517c 1682 }
9ea1b7a4 1683 return changed;
0996517c
HV		 1684}
1685
2ccbe779
SN		 1686/* Control range checking */
1687static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1688 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1689{
1690 switch (type) {
1691 case V4L2_CTRL_TYPE_BOOLEAN:
1692 if (step != 1 || max > 1 || min < 0)
1693 return -ERANGE;
1694 /* fall through */
dda4a4d5
HV		 1695 case V4L2_CTRL_TYPE_U8:
1696 case V4L2_CTRL_TYPE_U16:
811c5081 1697 case V4L2_CTRL_TYPE_U32:
2ccbe779 1698 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1699 case V4L2_CTRL_TYPE_INTEGER64:
1700 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1701 return -ERANGE;
1702 return 0;
1703 case V4L2_CTRL_TYPE_BITMASK:
1704 if (step || min || !max || (def & ~max))
1705 return -ERANGE;
1706 return 0;
1707 case V4L2_CTRL_TYPE_MENU:
1708 case V4L2_CTRL_TYPE_INTEGER_MENU:
1709 if (min > max || def < min || def > max)
1710 return -ERANGE;
1711 /* Note: step == menu_skip_mask for menu controls.
1712 So here we check if the default value is masked out. */
1713 if (step && ((1 << def) & step))
1714 return -EINVAL;
1715 return 0;
1716 case V4L2_CTRL_TYPE_STRING:
1717 if (min > max || min < 0 || step < 1 || def)
1718 return -ERANGE;
1719 return 0;
1720 default:
1721 return 0;
1722 }
1723}
1724
03d5285b 1725/* Validate a new control */
7a7f1ab3 1726static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1727{
302ab7ce
HV		 1728 unsigned idx;
1729 int err = 0;
1730
7a7f1ab3
HV		 1731 for (idx = 0; !err && idx < ctrl->elems; idx++)
1732 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1733 return err;
0996517c
HV		 1734}
1735
1736static inline u32 node2id(struct list_head *node)
1737{
1738 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1739}
1740
1741/* Set the handler's error code if it wasn't set earlier already */
1742static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1743{
1744 if (hdl->error == 0)
1745 hdl->error = err;
1746 return err;
1747}
1748
1749/* Initialize the handler */
6cd247ef
AW		 1750int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1751 unsigned nr_of_controls_hint,
1752 struct lock_class_key *key, const char *name)
0996517c 1753{
48e3e36a 1754 mutex_init(&hdl->_lock);
77e7c4e6 1755 hdl->lock = &hdl->_lock;
6cd247ef 1756 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1757 INIT_LIST_HEAD(&hdl->ctrls);
1758 INIT_LIST_HEAD(&hdl->ctrl_refs);
1759 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
758d90e1
TF		 1760 hdl->buckets = kvmalloc_array(hdl->nr_of_buckets,
1761 sizeof(hdl->buckets[0]),
1762 GFP_KERNEL | __GFP_ZERO);
0996517c
HV		 1763 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1764 return hdl->error;
1765}
6cd247ef 1766EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1767
1768/* Free all controls and control refs */
1769void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1770{
1771 struct v4l2_ctrl_ref *ref, *next_ref;
1772 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1773 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1774
1775 if (hdl == NULL || hdl->buckets == NULL)
1776 return;
1777
77e7c4e6 1778 mutex_lock(hdl->lock);
0996517c
HV		 1779 /* Free all nodes */
1780 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1781 list_del(&ref->node);
1782 kfree(ref);
1783 }
1784 /* Free all controls owned by the handler */
1785 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1786 list_del(&ctrl->node);
77068d36
HV		 1787 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1788 list_del(&sev->node);
758d90e1 1789 kvfree(ctrl);
0996517c 1790 }
758d90e1 1791 kvfree(hdl->buckets);
0996517c
HV		 1792 hdl->buckets = NULL;
1793 hdl->cached = NULL;
1794 hdl->error = 0;
77e7c4e6 1795 mutex_unlock(hdl->lock);
48e3e36a 1796 mutex_destroy(&hdl->_lock);
0996517c
HV		 1797}
1798EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1799
1800/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1801 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1802 with applications that do not use the NEXT_CTRL flag.
1803
1804 We just find the n-th private user control. It's O(N), but that should not
1805 be an issue in this particular case. */
1806static struct v4l2_ctrl_ref *find_private_ref(
1807 struct v4l2_ctrl_handler *hdl, u32 id)
1808{
1809 struct v4l2_ctrl_ref *ref;
1810
1811 id -= V4L2_CID_PRIVATE_BASE;
1812 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1813 /* Search for private user controls that are compatible with
1814 VIDIOC_G/S_CTRL. */
0f8017be 1815 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 1816 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1817 if (!ref->ctrl->is_int)
0996517c
HV		 1818 continue;
1819 if (id == 0)
1820 return ref;
1821 id--;
1822 }
1823 }
1824 return NULL;
1825}
1826
1827/* Find a control with the given ID. */
1828static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1829{
1830 struct v4l2_ctrl_ref *ref;
1831 int bucket;
1832
1833 id &= V4L2_CTRL_ID_MASK;
1834
1835 /* Old-style private controls need special handling */
1836 if (id >= V4L2_CID_PRIVATE_BASE)
1837 return find_private_ref(hdl, id);
1838 bucket = id % hdl->nr_of_buckets;
1839
1840 /* Simple optimization: cache the last control found */
1841 if (hdl->cached && hdl->cached->ctrl->id == id)
1842 return hdl->cached;
1843
1844 /* Not in cache, search the hash */
1845 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1846 while (ref && ref->ctrl->id != id)
1847 ref = ref->next;
1848
1849 if (ref)
1850 hdl->cached = ref; /* cache it! */
1851 return ref;
1852}
1853
1854/* Find a control with the given ID. Take the handler's lock first. */
1855static struct v4l2_ctrl_ref *find_ref_lock(
1856 struct v4l2_ctrl_handler *hdl, u32 id)
1857{
1858 struct v4l2_ctrl_ref *ref = NULL;
1859
1860 if (hdl) {
77e7c4e6 1861 mutex_lock(hdl->lock);
0996517c 1862 ref = find_ref(hdl, id);
77e7c4e6 1863 mutex_unlock(hdl->lock);
0996517c
HV		 1864 }
1865 return ref;
1866}
1867
1868/* Find a control with the given ID. */
1869struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1870{
1871 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1872
1873 return ref ? ref->ctrl : NULL;
1874}
1875EXPORT_SYMBOL(v4l2_ctrl_find);
1876
1877/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1878static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1879 struct v4l2_ctrl *ctrl)
1880{
1881 struct v4l2_ctrl_ref *ref;
1882 struct v4l2_ctrl_ref *new_ref;
1883 u32 id = ctrl->id;
0f8017be 1884 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c
HV		 1885 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1886
d9a25471
HV		 1887 /*
1888 * Automatically add the control class if it is not yet present and
1889 * the new control is not a compound control.
1890 */
1891 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1892 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1893 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1894 return hdl->error;
1895
1896 if (hdl->error)
1897 return hdl->error;
1898
1899 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1900 if (!new_ref)
1901 return handler_set_err(hdl, -ENOMEM);
1902 new_ref->ctrl = ctrl;
1903 if (ctrl->handler == hdl) {
1904 /* By default each control starts in a cluster of its own.
1905 new_ref->ctrl is basically a cluster array with one
1906 element, so that's perfect to use as the cluster pointer.
1907 But only do this for the handler that owns the control. */
1908 ctrl->cluster = &new_ref->ctrl;
1909 ctrl->ncontrols = 1;
1910 }
1911
1912 INIT_LIST_HEAD(&new_ref->node);
1913
77e7c4e6 1914 mutex_lock(hdl->lock);
0996517c
HV		 1915
1916 /* Add immediately at the end of the list if the list is empty, or if
1917 the last element in the list has a lower ID.
1918 This ensures that when elements are added in ascending order the
1919 insertion is an O(1) operation. */
1920 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1921 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1922 goto insert_in_hash;
1923 }
1924
1925 /* Find insert position in sorted list */
1926 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1927 if (ref->ctrl->id < id)
1928 continue;
1929 /* Don't add duplicates */
1930 if (ref->ctrl->id == id) {
1931 kfree(new_ref);
1932 goto unlock;
1933 }
1934 list_add(&new_ref->node, ref->node.prev);
1935 break;
1936 }
1937
1938insert_in_hash:
1939 /* Insert the control node in the hash */
1940 new_ref->next = hdl->buckets[bucket];
1941 hdl->buckets[bucket] = new_ref;
1942
1943unlock:
77e7c4e6 1944 mutex_unlock(hdl->lock);
0996517c
HV		 1945 return 0;
1946}
1947
1948/* Add a new control */
1949static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1950 const struct v4l2_ctrl_ops *ops,
0176077a 1951 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1952 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1953 s64 min, s64 max, u64 step, s64 def,
20d88eef 1954 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1955 u32 flags, const char * const *qmenu,
1956 const s64 *qmenu_int, void *priv)
0996517c
HV		 1957{
1958 struct v4l2_ctrl *ctrl;
d9a25471 1959 unsigned sz_extra;
20d88eef
HV		 1960 unsigned nr_of_dims = 0;
1961 unsigned elems = 1;
998e7659
HV		 1962 bool is_array;
1963 unsigned tot_ctrl_size;
302ab7ce 1964 unsigned idx;
d9a25471 1965 void *data;
2ccbe779 1966 int err;
0996517c
HV		 1967
1968 if (hdl->error)
1969 return NULL;
1970
20d88eef
HV		 1971 while (dims && dims[nr_of_dims]) {
1972 elems *= dims[nr_of_dims];
1973 nr_of_dims++;
1974 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1975 break;
1976 }
998e7659 1977 is_array = nr_of_dims > 0;
20d88eef 1978
dda4a4d5
HV		 1979 /* Prefill elem_size for all types handled by std_type_ops */
1980 switch (type) {
1981 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1982 elem_size = sizeof(s64);
dda4a4d5
HV		 1983 break;
1984 case V4L2_CTRL_TYPE_STRING:
d9a25471 1985 elem_size = max + 1;
dda4a4d5
HV		 1986 break;
1987 case V4L2_CTRL_TYPE_U8:
1988 elem_size = sizeof(u8);
1989 break;
1990 case V4L2_CTRL_TYPE_U16:
1991 elem_size = sizeof(u16);
1992 break;
811c5081
HV		 1993 case V4L2_CTRL_TYPE_U32:
1994 elem_size = sizeof(u32);
1995 break;
dda4a4d5
HV		 1996 default:
1997 if (type < V4L2_CTRL_COMPOUND_TYPES)
1998 elem_size = sizeof(s32);
1999 break;
2000 }
998e7659 2001 tot_ctrl_size = elem_size * elems;
d9a25471 2002
0996517c 2003 /* Sanity checks */
998e7659
HV		 2004 if (id == 0 || name == NULL || !elem_size ||
2005 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 2006 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 2007 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 2008 handler_set_err(hdl, -ERANGE);
2009 return NULL;
2010 }
2ccbe779
SN		 2011 err = check_range(type, min, max, step, def);
2012 if (err) {
2013 handler_set_err(hdl, err);
02ac0480
HV		 2014 return NULL;
2015 }
998e7659
HV		 2016 if (is_array &&
2017 (type == V4L2_CTRL_TYPE_BUTTON ||
2018 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
2019 handler_set_err(hdl, -EINVAL);
2020 return NULL;
2021 }
0996517c 2022
d9a25471 2023 sz_extra = 0;
0996517c 2024 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 2025 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
2026 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 2027 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
2028 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 2029 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
2030 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 2031 type >= V4L2_CTRL_COMPOUND_TYPES ||
2032 is_array)
2033 sz_extra += 2 * tot_ctrl_size;
0996517c 2034
758d90e1 2035 ctrl = kvzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
0996517c
HV		 2036 if (ctrl == NULL) {
2037 handler_set_err(hdl, -ENOMEM);
2038 return NULL;
2039 }
2040
2041 INIT_LIST_HEAD(&ctrl->node);
77068d36 2042 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2043 ctrl->handler = hdl;
2044 ctrl->ops = ops;
0176077a 2045 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2046 ctrl->id = id;
2047 ctrl->name = name;
2048 ctrl->type = type;
2049 ctrl->flags = flags;
2050 ctrl->minimum = min;
2051 ctrl->maximum = max;
2052 ctrl->step = step;
d9a25471 2053 ctrl->default_value = def;
998e7659
HV		 2054 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2055 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2056 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2057 ctrl->is_array = is_array;
20d88eef
HV		 2058 ctrl->elems = elems;
2059 ctrl->nr_of_dims = nr_of_dims;
2060 if (nr_of_dims)
2061 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2062 ctrl->elem_size = elem_size;
ce580fe5
SA		 2063 if (type == V4L2_CTRL_TYPE_MENU)
2064 ctrl->qmenu = qmenu;
2065 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2066 ctrl->qmenu_int = qmenu_int;
0996517c 2067 ctrl->priv = priv;
d9a25471 2068 ctrl->cur.val = ctrl->val = def;
2a9ec373 2069 data = &ctrl[1];
d9a25471 2070
2a9ec373
HV		 2071 if (!ctrl->is_int) {
2072 ctrl->p_new.p = data;
998e7659 2073 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2074 } else {
2075 ctrl->p_new.p = &ctrl->val;
2076 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2077 }
302ab7ce
HV		 2078 for (idx = 0; idx < elems; idx++) {
2079 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2080 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2081 }
0176077a 2082
0996517c 2083 if (handler_new_ref(hdl, ctrl)) {
758d90e1 2084 kvfree(ctrl);
0996517c
HV		 2085 return NULL;
2086 }
77e7c4e6 2087 mutex_lock(hdl->lock);
0996517c 2088 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2089 mutex_unlock(hdl->lock);
0996517c
HV		 2090 return ctrl;
2091}
2092
2093struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2094 const struct v4l2_ctrl_config *cfg, void *priv)
2095{
2096 bool is_menu;
2097 struct v4l2_ctrl *ctrl;
2098 const char *name = cfg->name;
513521ea 2099 const char * const *qmenu = cfg->qmenu;
ce580fe5 2100 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2101 enum v4l2_ctrl_type type = cfg->type;
2102 u32 flags = cfg->flags;
0ba2aeb6
HV		 2103 s64 min = cfg->min;
2104 s64 max = cfg->max;
2105 u64 step = cfg->step;
2106 s64 def = cfg->def;
0996517c
HV		 2107
2108 if (name == NULL)
2109 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2110 &def, &flags);
2111
ce580fe5
SA		 2112 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2113 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2114 if (is_menu)
2115 WARN_ON(step);
2116 else
2117 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2118 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2119 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2120 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2121 qmenu_int == NULL) {
2122 handler_set_err(hdl, -EINVAL);
2123 return NULL;
2124 }
0996517c 2125
0176077a 2126 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2127 type, min, max,
20d88eef
HV		 2128 is_menu ? cfg->menu_skip_mask : step, def,
2129 cfg->dims, cfg->elem_size,
d9a25471 2130 flags, qmenu, qmenu_int, priv);
88365105 2131 if (ctrl)
0996517c 2132 ctrl->is_private = cfg->is_private;
0996517c
HV		 2133 return ctrl;
2134}
2135EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2136
2137/* Helper function for standard non-menu controls */
2138struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2139 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2140 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2141{
2142 const char *name;
2143 enum v4l2_ctrl_type type;
2144 u32 flags;
2145
2146 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2147 if (type == V4L2_CTRL_TYPE_MENU ||
2148 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2149 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2150 handler_set_err(hdl, -EINVAL);
2151 return NULL;
2152 }
0176077a 2153 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2154 min, max, step, def, NULL, 0,
d9a25471 2155 flags, NULL, NULL, NULL);
0996517c
HV		 2156}
2157EXPORT_SYMBOL(v4l2_ctrl_new_std);
2158
2159/* Helper function for standard menu controls */
2160struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2161 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2162 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2163{
d1e9b7c1
SN		 2164 const char * const *qmenu = NULL;
2165 const s64 *qmenu_int = NULL;
fbbb29a6 2166 unsigned int qmenu_int_len = 0;
0996517c
HV		 2167 const char *name;
2168 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2169 s64 min;
2170 s64 max = _max;
2171 s64 def = _def;
2172 u64 step;
0996517c
HV		 2173 u32 flags;
2174
2175 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2176
2177 if (type == V4L2_CTRL_TYPE_MENU)
2178 qmenu = v4l2_ctrl_get_menu(id);
2179 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2180 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2181
2182 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2183 handler_set_err(hdl, -EINVAL);
2184 return NULL;
2185 }
0176077a 2186 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2187 0, max, mask, def, NULL, 0,
d9a25471 2188 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2189}
2190EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2191
117a711a
LP		 2192/* Helper function for standard menu controls with driver defined menu */
2193struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2194 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2195 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2196{
2197 enum v4l2_ctrl_type type;
2198 const char *name;
2199 u32 flags;
0ba2aeb6
HV		 2200 u64 step;
2201 s64 min;
2202 s64 max = _max;
2203 s64 def = _def;
117a711a
LP		 2204
2205 /* v4l2_ctrl_new_std_menu_items() should only be called for
2206 * standard controls without a standard menu.
2207 */
2208 if (v4l2_ctrl_get_menu(id)) {
2209 handler_set_err(hdl, -EINVAL);
2210 return NULL;
2211 }
2212
2213 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2214 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2215 handler_set_err(hdl, -EINVAL);
2216 return NULL;
2217 }
0176077a 2218 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2219 0, max, mask, def, NULL, 0,
2220 flags, qmenu, NULL, NULL);
117a711a
LP		 2221
2222}
2223EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2224
515f3287
SN		 2225/* Helper function for standard integer menu controls */
2226struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2227 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2228 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2229{
2230 const char *name;
2231 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2232 s64 min;
2233 u64 step;
2234 s64 max = _max;
2235 s64 def = _def;
515f3287
SN		 2236 u32 flags;
2237
2238 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2239 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2240 handler_set_err(hdl, -EINVAL);
2241 return NULL;
2242 }
0176077a 2243 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2244 0, max, 0, def, NULL, 0,
d9a25471 2245 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2246}
2247EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2248
0996517c
HV		 2249/* Add the controls from another handler to our own. */
2250int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2251 struct v4l2_ctrl_handler *add,
2252 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2253{
072e6602 2254 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2255 int ret = 0;
2256
2257 /* Do nothing if either handler is NULL or if they are the same */
2258 if (!hdl || !add || hdl == add)
2259 return 0;
2260 if (hdl->error)
2261 return hdl->error;
77e7c4e6 2262 mutex_lock(add->lock);
072e6602
HV		 2263 list_for_each_entry(ref, &add->ctrl_refs, node) {
2264 struct v4l2_ctrl *ctrl = ref->ctrl;
2265
0996517c
HV		 2266 /* Skip handler-private controls. */
2267 if (ctrl->is_private)
2268 continue;
6e239399
HV		 2269 /* And control classes */
2270 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2271 continue;
34a6b7d0
HV		 2272 /* Filter any unwanted controls */
2273 if (filter && !filter(ctrl))
2274 continue;
0996517c
HV		 2275 ret = handler_new_ref(hdl, ctrl);
2276 if (ret)
2277 break;
2278 }
77e7c4e6 2279 mutex_unlock(add->lock);
0996517c
HV		 2280 return ret;
2281}
2282EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2283
34a6b7d0
HV		 2284bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2285{
0f8017be 2286 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2287 return true;
0f8017be 2288 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2289 return true;
34a6b7d0
HV		 2290 switch (ctrl->id) {
2291 case V4L2_CID_AUDIO_MUTE:
2292 case V4L2_CID_AUDIO_VOLUME:
2293 case V4L2_CID_AUDIO_BALANCE:
2294 case V4L2_CID_AUDIO_BASS:
2295 case V4L2_CID_AUDIO_TREBLE:
2296 case V4L2_CID_AUDIO_LOUDNESS:
2297 return true;
2298 default:
2299 break;
2300 }
2301 return false;
2302}
2303EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2304
0996517c
HV		 2305/* Cluster controls */
2306void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2307{
5626b8c7 2308 bool has_volatiles = false;
0996517c
HV		 2309 int i;
2310
2311 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2312 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2313 return;
0996517c
HV		 2314
2315 for (i = 0; i < ncontrols; i++) {
2316 if (controls[i]) {
2317 controls[i]->cluster = controls;
2318 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2319 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2320 has_volatiles = true;
0996517c
HV		 2321 }
2322 }
5626b8c7 2323 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2324}
2325EXPORT_SYMBOL(v4l2_ctrl_cluster);
2326
72d877ca
HV		 2327void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2328 u8 manual_val, bool set_volatile)
2329{
2330 struct v4l2_ctrl *master = controls[0];
5626b8c7 2331 u32 flag = 0;
72d877ca
HV		 2332 int i;
2333
2334 v4l2_ctrl_cluster(ncontrols, controls);
2335 WARN_ON(ncontrols <= 1);
82a7c049 2336 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2337 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2338 master->is_auto = true;
5626b8c7 2339 master->has_volatiles = set_volatile;
72d877ca
HV		 2340 master->manual_mode_value = manual_val;
2341 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2342
2343 if (!is_cur_manual(master))
2344 flag = V4L2_CTRL_FLAG_INACTIVE |
2345 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2346
2347 for (i = 1; i < ncontrols; i++)
88365105 2348 if (controls[i])
72d877ca 2349 controls[i]->flags |= flag;
72d877ca
HV		 2350}
2351EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2352
0996517c
HV		 2353/* Activate/deactivate a control. */
2354void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2355{
6e239399
HV		 2356 /* invert since the actual flag is called 'inactive' */
2357 bool inactive = !active;
2358 bool old;
2359
0996517c
HV		 2360 if (ctrl == NULL)
2361 return;
2362
6e239399 2363 if (inactive)
0996517c 2364 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2365 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2366 else
2367 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2368 old = test_and_clear_bit(4, &ctrl->flags);
2369 if (old != inactive)
2370 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2371}
2372EXPORT_SYMBOL(v4l2_ctrl_activate);
2373
2374/* Grab/ungrab a control.
2375 Typically used when streaming starts and you want to grab controls,
2376 preventing the user from changing them.
2377
2378 Just call this and the framework will block any attempts to change
2379 these controls. */
2380void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2381{
6e239399
HV		 2382 bool old;
2383
0996517c
HV		 2384 if (ctrl == NULL)
2385 return;
2386
6e239399 2387 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2388 if (grabbed)
2389 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2390 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2391 else
2392 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2393 old = test_and_clear_bit(1, &ctrl->flags);
2394 if (old != grabbed)
2395 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2396 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2397}
2398EXPORT_SYMBOL(v4l2_ctrl_grab);
2399
2400/* Log the control name and value */
2401static void log_ctrl(const struct v4l2_ctrl *ctrl,
2402 const char *prefix, const char *colon)
2403{
0996517c
HV		 2404 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2405 return;
2406 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2407 return;
2408
7eafbce9 2409 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2410
0176077a
HV		 2411 ctrl->type_ops->log(ctrl);
2412
88365105
HV		 2413 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2414 V4L2_CTRL_FLAG_GRABBED |
2415 V4L2_CTRL_FLAG_VOLATILE)) {
2416 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2417 pr_cont(" inactive");
88365105 2418 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2419 pr_cont(" grabbed");
88365105 2420 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2421 pr_cont(" volatile");
88365105 2422 }
7eafbce9 2423 pr_cont("\n");
0996517c
HV		 2424}
2425
2426/* Log all controls owned by the handler */
2427void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2428 const char *prefix)
2429{
2430 struct v4l2_ctrl *ctrl;
2431 const char *colon = "";
2432 int len;
2433
2434 if (hdl == NULL)
2435 return;
2436 if (prefix == NULL)
2437 prefix = "";
2438 len = strlen(prefix);
2439 if (len && prefix[len - 1] != ' ')
2440 colon = ": ";
77e7c4e6 2441 mutex_lock(hdl->lock);
0996517c
HV		 2442 list_for_each_entry(ctrl, &hdl->ctrls, node)
2443 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2444 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2445 mutex_unlock(hdl->lock);
0996517c
HV		 2446}
2447EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2448
ffa9b9f0
SN		 2449int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2450{
2451 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2452 return 0;
2453}
2454EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2455
0996517c 2456/* Call s_ctrl for all controls owned by the handler */
cc0140e2 2457int __v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
0996517c
HV		 2458{
2459 struct v4l2_ctrl *ctrl;
2460 int ret = 0;
2461
2462 if (hdl == NULL)
2463 return 0;
cc0140e2
SA		 2464
2465 lockdep_assert_held(hdl->lock);
2466
0996517c
HV		 2467 list_for_each_entry(ctrl, &hdl->ctrls, node)
2468 ctrl->done = false;
2469
2470 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2471 struct v4l2_ctrl *master = ctrl->cluster[0];
2472 int i;
2473
2474 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2475 /* Skip button controls and read-only controls. */
2476 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2477 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2478 continue;
2479
2a863793
HV		 2480 for (i = 0; i < master->ncontrols; i++) {
2481 if (master->cluster[i]) {
2482 cur_to_new(master->cluster[i]);
2483 master->cluster[i]->is_new = 1;
71c6c4c9 2484 master->cluster[i]->done = true;
2a863793
HV		 2485 }
2486 }
54c911eb 2487 ret = call_op(master, s_ctrl);
0996517c
HV		 2488 if (ret)
2489 break;
0996517c 2490 }
cc0140e2
SA		 2491
2492 return ret;
2493}
2494EXPORT_SYMBOL_GPL(__v4l2_ctrl_handler_setup);
2495
2496int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2497{
2498 int ret;
2499
2500 if (hdl == NULL)
2501 return 0;
2502
2503 mutex_lock(hdl->lock);
2504 ret = __v4l2_ctrl_handler_setup(hdl);
77e7c4e6 2505 mutex_unlock(hdl->lock);
cc0140e2 2506
0996517c
HV		 2507 return ret;
2508}
2509EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2510
d9a25471
HV		 2511/* Implement VIDIOC_QUERY_EXT_CTRL */
2512int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2513{
d9a25471 2514 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2515 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2516 struct v4l2_ctrl_ref *ref;
2517 struct v4l2_ctrl *ctrl;
2518
2519 if (hdl == NULL)
2520 return -EINVAL;
2521
77e7c4e6 2522 mutex_lock(hdl->lock);
0996517c
HV		 2523
2524 /* Try to find it */
2525 ref = find_ref(hdl, id);
2526
d9a25471
HV		 2527 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2528 bool is_compound;
2529 /* Match any control that is not hidden */
2530 unsigned mask = 1;
2531 bool match = false;
2532
2533 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2534 /* Match any hidden control */
2535 match = true;
2536 } else if ((qc->id & next_flags) == next_flags) {
2537 /* Match any control, compound or not */
2538 mask = 0;
2539 }
2540
0996517c
HV		 2541 /* Find the next control with ID > qc->id */
2542
2543 /* Did we reach the end of the control list? */
2544 if (id >= node2id(hdl->ctrl_refs.prev)) {
2545 ref = NULL; /* Yes, so there is no next control */
2546 } else if (ref) {
2547 /* We found a control with the given ID, so just get
d9a25471
HV		 2548 the next valid one in the list. */
2549 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2550 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2551 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2552 if (id < ref->ctrl->id &&
2553 (is_compound & mask) == match)
2554 break;
2555 }
2556 if (&ref->node == &hdl->ctrl_refs)
2557 ref = NULL;
0996517c
HV		 2558 } else {
2559 /* No control with the given ID exists, so start
2560 searching for the next largest ID. We know there
2561 is one, otherwise the first 'if' above would have
2562 been true. */
d9a25471 2563 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2564 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2565 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2566 if (id < ref->ctrl->id &&
2567 (is_compound & mask) == match)
0996517c 2568 break;
d9a25471
HV		 2569 }
2570 if (&ref->node == &hdl->ctrl_refs)
2571 ref = NULL;
0996517c
HV		 2572 }
2573 }
77e7c4e6 2574 mutex_unlock(hdl->lock);
d9a25471 2575
0996517c
HV		 2576 if (!ref)
2577 return -EINVAL;
2578
2579 ctrl = ref->ctrl;
2580 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2581 if (id >= V4L2_CID_PRIVATE_BASE)
2582 qc->id = id;
2583 else
2584 qc->id = ctrl->id;
0996517c 2585 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
9cac9d2f 2586 qc->flags = user_flags(ctrl);
d9a25471 2587 qc->type = ctrl->type;
d9a25471 2588 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2589 qc->elems = ctrl->elems;
2590 qc->nr_of_dims = ctrl->nr_of_dims;
2591 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2592 qc->minimum = ctrl->minimum;
2593 qc->maximum = ctrl->maximum;
2594 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2595 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2596 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2597 qc->step = 1;
2598 else
2599 qc->step = ctrl->step;
d9a25471
HV		 2600 return 0;
2601}
2602EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2603
2604/* Implement VIDIOC_QUERYCTRL */
2605int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2606{
2607 struct v4l2_query_ext_ctrl qec = { qc->id };
2608 int rc;
2609
2610 rc = v4l2_query_ext_ctrl(hdl, &qec);
2611 if (rc)
2612 return rc;
2613
2614 qc->id = qec.id;
2615 qc->type = qec.type;
2616 qc->flags = qec.flags;
2617 strlcpy(qc->name, qec.name, sizeof(qc->name));
2618 switch (qc->type) {
2619 case V4L2_CTRL_TYPE_INTEGER:
2620 case V4L2_CTRL_TYPE_BOOLEAN:
2621 case V4L2_CTRL_TYPE_MENU:
2622 case V4L2_CTRL_TYPE_INTEGER_MENU:
2623 case V4L2_CTRL_TYPE_STRING:
2624 case V4L2_CTRL_TYPE_BITMASK:
2625 qc->minimum = qec.minimum;
2626 qc->maximum = qec.maximum;
2627 qc->step = qec.step;
2628 qc->default_value = qec.default_value;
2629 break;
2630 default:
2631 qc->minimum = 0;
2632 qc->maximum = 0;
2633 qc->step = 0;
2634 qc->default_value = 0;
2635 break;
2636 }
0996517c
HV		 2637 return 0;
2638}
2639EXPORT_SYMBOL(v4l2_queryctrl);
2640
0996517c
HV		 2641/* Implement VIDIOC_QUERYMENU */
2642int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2643{
2644 struct v4l2_ctrl *ctrl;
2645 u32 i = qm->index;
2646
2647 ctrl = v4l2_ctrl_find(hdl, qm->id);
2648 if (!ctrl)
2649 return -EINVAL;
2650
2651 qm->reserved = 0;
2652 /* Sanity checks */
ce580fe5
SA		 2653 switch (ctrl->type) {
2654 case V4L2_CTRL_TYPE_MENU:
2655 if (ctrl->qmenu == NULL)
2656 return -EINVAL;
2657 break;
2658 case V4L2_CTRL_TYPE_INTEGER_MENU:
2659 if (ctrl->qmenu_int == NULL)
2660 return -EINVAL;
2661 break;
2662 default:
2663 return -EINVAL;
2664 }
2665
2666 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2667 return -EINVAL;
ce580fe5 2668
0996517c
HV		 2669 /* Use mask to see if this menu item should be skipped */
2670 if (ctrl->menu_skip_mask & (1 << i))
2671 return -EINVAL;
2672 /* Empty menu items should also be skipped */
ce580fe5
SA		 2673 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2674 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2675 return -EINVAL;
2676 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2677 } else {
2678 qm->value = ctrl->qmenu_int[i];
2679 }
0996517c
HV		 2680 return 0;
2681}
2682EXPORT_SYMBOL(v4l2_querymenu);
2683
0996517c
HV		 2684
2685/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2686
2687 It is not a fully atomic operation, just best-effort only. After all, if
2688 multiple controls have to be set through multiple i2c writes (for example)
2689 then some initial writes may succeed while others fail. Thus leaving the
2690 system in an inconsistent state. The question is how much effort you are
2691 willing to spend on trying to make something atomic that really isn't.
2692
2693 From the point of view of an application the main requirement is that
2694 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2695 error should be returned without actually affecting any controls.
2696
2697 If all the values are correct, then it is acceptable to just give up
2698 in case of low-level errors.
2699
2700 It is important though that the application can tell when only a partial
2701 configuration was done. The way we do that is through the error_idx field
2702 of struct v4l2_ext_controls: if that is equal to the count field then no
2703 controls were affected. Otherwise all controls before that index were
2704 successful in performing their 'get' or 'set' operation, the control at
2705 the given index failed, and you don't know what happened with the controls
2706 after the failed one. Since if they were part of a control cluster they
2707 could have been successfully processed (if a cluster member was encountered
2708 at index < error_idx), they could have failed (if a cluster member was at
2709 error_idx), or they may not have been processed yet (if the first cluster
2710 member appeared after error_idx).
2711
2712 It is all fairly theoretical, though. In practice all you can do is to
2713 bail out. If error_idx == count, then it is an application bug. If
2714 error_idx < count then it is only an application bug if the error code was
2715 EBUSY. That usually means that something started streaming just when you
2716 tried to set the controls. In all other cases it is a driver/hardware
2717 problem and all you can do is to retry or bail out.
2718
2719 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2720 never modifies controls the error_idx is just set to whatever control
2721 has an invalid value.
2722 */
2723
2724/* Prepare for the extended g/s/try functions.
2725 Find the controls in the control array and do some basic checks. */
2726static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2727 struct v4l2_ext_controls *cs,
d9a25471
HV		 2728 struct v4l2_ctrl_helper *helpers,
2729 bool get)
0996517c 2730{
eb5b16ef
HV		 2731 struct v4l2_ctrl_helper *h;
2732 bool have_clusters = false;
0996517c
HV		 2733 u32 i;
2734
eb5b16ef 2735 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2736 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2737 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2738 struct v4l2_ctrl *ctrl;
2739 u32 id = c->id & V4L2_CTRL_ID_MASK;
2740
37cd3b73 2741 cs->error_idx = i;
0996517c 2742
953eae5d
RR		 2743 if (cs->which &&
2744 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
2745 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 2746 return -EINVAL;
2747
2748 /* Old-style private controls are not allowed for
2749 extended controls */
2750 if (id >= V4L2_CID_PRIVATE_BASE)
2751 return -EINVAL;
eb5b16ef
HV		 2752 ref = find_ref_lock(hdl, id);
2753 if (ref == NULL)
0996517c 2754 return -EINVAL;
eb5b16ef 2755 ctrl = ref->ctrl;
0996517c
HV		 2756 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2757 return -EINVAL;
2758
eb5b16ef
HV		 2759 if (ctrl->cluster[0]->ncontrols > 1)
2760 have_clusters = true;
2761 if (ctrl->cluster[0] != ctrl)
2762 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2763 if (ctrl->is_ptr && !ctrl->is_string) {
2764 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2765
2766 if (c->size < tot_size) {
2767 if (get) {
2768 c->size = tot_size;
2769 return -ENOSPC;
2770 }
2771 return -EFAULT;
d9a25471 2772 }
302ab7ce 2773 c->size = tot_size;
d9a25471 2774 }
eb5b16ef
HV		 2775 /* Store the ref to the master control of the cluster */
2776 h->mref = ref;
2777 h->ctrl = ctrl;
2778 /* Initially set next to 0, meaning that there is no other
2779 control in this helper array belonging to the same
2780 cluster */
2781 h->next = 0;
0996517c 2782 }
0996517c 2783
eb5b16ef
HV		 2784 /* We are done if there were no controls that belong to a multi-
2785 control cluster. */
2786 if (!have_clusters)
2787 return 0;
0996517c 2788
eb5b16ef
HV		 2789 /* The code below figures out in O(n) time which controls in the list
2790 belong to the same cluster. */
0996517c 2791
eb5b16ef 2792 /* This has to be done with the handler lock taken. */
77e7c4e6 2793 mutex_lock(hdl->lock);
0996517c 2794
eb5b16ef
HV		 2795 /* First zero the helper field in the master control references */
2796 for (i = 0; i < cs->count; i++)
c082266f 2797 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2798 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2799 struct v4l2_ctrl_ref *mref = h->mref;
2800
2801 /* If the mref->helper is set, then it points to an earlier
2802 helper that belongs to the same cluster. */
2803 if (mref->helper) {
2804 /* Set the next field of mref->helper to the current
2805 index: this means that that earlier helper now
2806 points to the next helper in the same cluster. */
2807 mref->helper->next = i;
2808 /* mref should be set only for the first helper in the
2809 cluster, clear the others. */
2810 h->mref = NULL;
2811 }
2812 /* Point the mref helper to the current helper struct. */
2813 mref->helper = h;
0996517c 2814 }
77e7c4e6 2815 mutex_unlock(hdl->lock);
eb5b16ef 2816 return 0;
0996517c
HV		 2817}
2818
2819/* Handles the corner case where cs->count == 0. It checks whether the
2820 specified control class exists. If that class ID is 0, then it checks
2821 whether there are any controls at all. */
0f8017be 2822static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 2823{
953eae5d 2824 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL)
cecfe9b8 2825 return 0;
0f8017be 2826 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 2827}
2828
2829
2830
2831/* Get extended controls. Allocates the helpers array if needed. */
2832int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2833{
eb5b16ef
HV		 2834 struct v4l2_ctrl_helper helper[4];
2835 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2836 int ret;
ddac5c10 2837 int i, j;
953eae5d
RR		 2838 bool def_value;
2839
2840 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 2841
2842 cs->error_idx = cs->count;
0f8017be 2843 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 2844
2845 if (hdl == NULL)
2846 return -EINVAL;
2847
2848 if (cs->count == 0)
0f8017be 2849 return class_check(hdl, cs->which);
0996517c
HV		 2850
2851 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 2852 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
2853 GFP_KERNEL);
0996517c
HV		 2854 if (helpers == NULL)
2855 return -ENOMEM;
2856 }
2857
d9a25471 2858 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2859 cs->error_idx = cs->count;
0996517c
HV		 2860
2861 for (i = 0; !ret && i < cs->count; i++)
2862 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2863 ret = -EACCES;
2864
2865 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 2866 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 2867 struct v4l2_ctrl *ctrl);
eb5b16ef 2868 struct v4l2_ctrl *master;
0996517c 2869
953eae5d
RR		 2870 ctrl_to_user = def_value ? def_to_user : cur_to_user;
2871
eb5b16ef 2872 if (helpers[i].mref == NULL)
0996517c
HV		 2873 continue;
2874
eb5b16ef 2875 master = helpers[i].mref->ctrl;
0996517c
HV		 2876 cs->error_idx = i;
2877
2878 v4l2_ctrl_lock(master);
ddac5c10
HV		 2879
2880 /* g_volatile_ctrl will update the new control values */
953eae5d
RR		 2881 if (!def_value &&
2882 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2883 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 2884 for (j = 0; j < master->ncontrols; j++)
2885 cur_to_new(master->cluster[j]);
54c911eb 2886 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2887 ctrl_to_user = new_to_user;
ddac5c10
HV		 2888 }
2889 /* If OK, then copy the current (for non-volatile controls)
2890 or the new (for volatile controls) control values to the
2891 caller */
eb5b16ef
HV		 2892 if (!ret) {
2893 u32 idx = i;
2894
2895 do {
2896 ret = ctrl_to_user(cs->controls + idx,
2897 helpers[idx].ctrl);
2898 idx = helpers[idx].next;
2899 } while (!ret && idx);
2900 }
0996517c 2901 v4l2_ctrl_unlock(master);
0996517c
HV		 2902 }
2903
2904 if (cs->count > ARRAY_SIZE(helper))
758d90e1 2905 kvfree(helpers);
0996517c
HV		 2906 return ret;
2907}
2908EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2909
0996517c 2910/* Helper function to get a single control */
03d5285b 2911static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2912{
2913 struct v4l2_ctrl *master = ctrl->cluster[0];
2914 int ret = 0;
ddac5c10 2915 int i;
0996517c 2916
d9a25471 2917 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2918 * cur_to_user() calls below would need to be modified not to access
2919 * userspace memory when called from get_ctrl().
2920 */
a8077734 2921 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 2922 return -EINVAL;
2923
0996517c
HV		 2924 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2925 return -EACCES;
2926
2927 v4l2_ctrl_lock(master);
2928 /* g_volatile_ctrl will update the current control values */
5626b8c7 2929 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2930 for (i = 0; i < master->ncontrols; i++)
2931 cur_to_new(master->cluster[i]);
54c911eb 2932 ret = call_op(master, g_volatile_ctrl);
03d5285b 2933 new_to_user(c, ctrl);
ddac5c10 2934 } else {
03d5285b 2935 cur_to_user(c, ctrl);
ddac5c10 2936 }
0996517c
HV		 2937 v4l2_ctrl_unlock(master);
2938 return ret;
2939}
2940
2941int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2942{
2943 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2944 struct v4l2_ext_control c;
2945 int ret;
0996517c 2946
d9a25471 2947 if (ctrl == NULL || !ctrl->is_int)
0996517c 2948 return -EINVAL;
03d5285b
LP		 2949 ret = get_ctrl(ctrl, &c);
2950 control->value = c.value;
2951 return ret;
0996517c
HV		 2952}
2953EXPORT_SYMBOL(v4l2_g_ctrl);
2954
0996517c
HV		 2955s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2956{
03d5285b 2957 struct v4l2_ext_control c;
0996517c
HV		 2958
2959 /* It's a driver bug if this happens. */
d9a25471 2960 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2961 c.value = 0;
2962 get_ctrl(ctrl, &c);
2963 return c.value;
0996517c
HV		 2964}
2965EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2966
03d5285b
LP		 2967s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2968{
2969 struct v4l2_ext_control c;
2970
2971 /* It's a driver bug if this happens. */
998e7659 2972 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 2973 c.value64 = 0;
03d5285b 2974 get_ctrl(ctrl, &c);
a8077734 2975 return c.value64;
03d5285b
LP		 2976}
2977EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2978
0996517c
HV		 2979
2980/* Core function that calls try/s_ctrl and ensures that the new value is
2981 copied to the current value on a set.
2982 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2983static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2984 bool set, u32 ch_flags)
0996517c 2985{
72d877ca 2986 bool update_flag;
eb5b16ef 2987 int ret;
0996517c
HV		 2988 int i;
2989
2990 /* Go through the cluster and either validate the new value or
2991 (if no new value was set), copy the current value to the new
2992 value, ensuring a consistent view for the control ops when
2993 called. */
eb5b16ef 2994 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2995 struct v4l2_ctrl *ctrl = master->cluster[i];
2996
2997 if (ctrl == NULL)
2998 continue;
2999
eb5b16ef
HV		 3000 if (!ctrl->is_new) {
3001 cur_to_new(ctrl);
0996517c
HV		 3002 continue;
3003 }
eb5b16ef
HV		 3004 /* Check again: it may have changed since the
3005 previous check in try_or_set_ext_ctrls(). */
3006 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3007 return -EBUSY;
0996517c
HV		 3008 }
3009
eb5b16ef 3010 ret = call_op(master, try_ctrl);
0996517c
HV		 3011
3012 /* Don't set if there is no change */
72d877ca
HV		 3013 if (ret || !set || !cluster_changed(master))
3014 return ret;
3015 ret = call_op(master, s_ctrl);
72d877ca
HV		 3016 if (ret)
3017 return ret;
3018
eb5b16ef 3019 /* If OK, then make the new values permanent. */
72d877ca
HV		 3020 update_flag = is_cur_manual(master) != is_new_manual(master);
3021 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 3022 new_to_cur(fh, master->cluster[i], ch_flags |
3023 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 3024 return 0;
0996517c
HV		 3025}
3026
e6402585
HV		 3027/* Validate controls. */
3028static int validate_ctrls(struct v4l2_ext_controls *cs,
3029 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3030{
e6402585 3031 unsigned i;
0996517c
HV		 3032 int ret = 0;
3033
eb5b16ef 3034 cs->error_idx = cs->count;
0996517c
HV		 3035 for (i = 0; i < cs->count; i++) {
3036 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3037 union v4l2_ctrl_ptr p_new;
0996517c 3038
e6402585 3039 cs->error_idx = i;
0996517c
HV		 3040
3041 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3042 return -EACCES;
3043 /* This test is also done in try_set_control_cluster() which
3044 is called in atomic context, so that has the final say,
3045 but it makes sense to do an up-front check as well. Once
3046 an error occurs in try_set_control_cluster() some other
3047 controls may have been set already and we want to do a
3048 best-effort to avoid that. */
3049 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3050 return -EBUSY;
7a7f1ab3
HV		 3051 /*
3052 * Skip validation for now if the payload needs to be copied
3053 * from userspace into kernelspace. We'll validate those later.
3054 */
3055 if (ctrl->is_ptr)
3056 continue;
3057 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3058 p_new.p_s64 = &cs->controls[i].value64;
3059 else
3060 p_new.p_s32 = &cs->controls[i].value;
3061 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3062 if (ret)
3063 return ret;
0996517c 3064 }
e6402585
HV		 3065 return 0;
3066}
3067
5626b8c7
HV		 3068/* Obtain the current volatile values of an autocluster and mark them
3069 as new. */
3070static void update_from_auto_cluster(struct v4l2_ctrl *master)
3071{
3072 int i;
3073
759b26a1 3074 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3075 cur_to_new(master->cluster[i]);
3076 if (!call_op(master, g_volatile_ctrl))
3077 for (i = 1; i < master->ncontrols; i++)
3078 if (master->cluster[i])
3079 master->cluster[i]->is_new = 1;
3080}
3081
e6402585
HV		 3082/* Try or try-and-set controls */
3083static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3084 struct v4l2_ext_controls *cs,
3085 bool set)
3086{
3087 struct v4l2_ctrl_helper helper[4];
3088 struct v4l2_ctrl_helper *helpers = helper;
3089 unsigned i, j;
3090 int ret;
3091
3092 cs->error_idx = cs->count;
953eae5d
RR		 3093
3094 /* Default value cannot be changed */
3095 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3096 return -EINVAL;
3097
0f8017be 3098 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3099
3100 if (hdl == NULL)
3101 return -EINVAL;
3102
3103 if (cs->count == 0)
0f8017be 3104 return class_check(hdl, cs->which);
0996517c 3105
e6402585 3106 if (cs->count > ARRAY_SIZE(helper)) {
758d90e1
TF		 3107 helpers = kvmalloc_array(cs->count, sizeof(helper[0]),
3108 GFP_KERNEL);
e6402585
HV		 3109 if (!helpers)
3110 return -ENOMEM;
3111 }
d9a25471 3112 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3113 if (!ret)
3114 ret = validate_ctrls(cs, helpers, set);
3115 if (ret && set)
3116 cs->error_idx = cs->count;
0996517c 3117 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3118 struct v4l2_ctrl *master;
3119 u32 idx = i;
0996517c 3120
eb5b16ef 3121 if (helpers[i].mref == NULL)
0996517c
HV		 3122 continue;
3123
37cd3b73 3124 cs->error_idx = i;
eb5b16ef
HV		 3125 master = helpers[i].mref->ctrl;
3126 v4l2_ctrl_lock(master);
0996517c 3127
2a863793 3128 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3129 for (j = 0; j < master->ncontrols; j++)
3130 if (master->cluster[j])
2a863793 3131 master->cluster[j]->is_new = 0;
0996517c 3132
5626b8c7
HV		 3133 /* For volatile autoclusters that are currently in auto mode
3134 we need to discover if it will be set to manual mode.
3135 If so, then we have to copy the current volatile values
3136 first since those will become the new manual values (which
3137 may be overwritten by explicit new values from this set
3138 of controls). */
3139 if (master->is_auto && master->has_volatiles &&
3140 !is_cur_manual(master)) {
3141 /* Pick an initial non-manual value */
3142 s32 new_auto_val = master->manual_mode_value + 1;
3143 u32 tmp_idx = idx;
3144
3145 do {
3146 /* Check if the auto control is part of the
3147 list, and remember the new value. */
3148 if (helpers[tmp_idx].ctrl == master)
3149 new_auto_val = cs->controls[tmp_idx].value;
3150 tmp_idx = helpers[tmp_idx].next;
3151 } while (tmp_idx);
3152 /* If the new value == the manual value, then copy
3153 the current volatile values. */
3154 if (new_auto_val == master->manual_mode_value)
3155 update_from_auto_cluster(master);
3156 }
3157
0996517c 3158 /* Copy the new caller-supplied control values.
2a863793 3159 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3160 do {
7a7f1ab3
HV		 3161 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3162
3163 ret = user_to_new(cs->controls + idx, ctrl);
3164 if (!ret && ctrl->is_ptr)
3165 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3166 idx = helpers[idx].next;
3167 } while (!ret && idx);
0996517c
HV		 3168
3169 if (!ret)
2ccbe779 3170 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3171
3172 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3173 if (!ret) {
3174 idx = i;
3175 do {
adf41b9b 3176 ret = new_to_user(cs->controls + idx,
e6402585 3177 helpers[idx].ctrl);
eb5b16ef
HV		 3178 idx = helpers[idx].next;
3179 } while (!ret && idx);
3180 }
3181 v4l2_ctrl_unlock(master);
0996517c 3182 }
0996517c 3183
0996517c 3184 if (cs->count > ARRAY_SIZE(helper))
758d90e1 3185 kvfree(helpers);
0996517c
HV		 3186 return ret;
3187}
3188
3189int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3190{
ab892bac 3191 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3192}
3193EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3194
ab892bac
HV		 3195int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3196 struct v4l2_ext_controls *cs)
0996517c 3197{
ab892bac 3198 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3199}
3200EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3201
0996517c 3202/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3203static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3204{
3205 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3206 int ret;
0996517c
HV		 3207 int i;
3208
2a863793 3209 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3210 for (i = 0; i < master->ncontrols; i++)
3211 if (master->cluster[i])
2a863793 3212 master->cluster[i]->is_new = 0;
0996517c 3213
7a7f1ab3
HV		 3214 ret = validate_new(ctrl, ctrl->p_new);
3215 if (ret)
3216 return ret;
5d0360a4 3217
5626b8c7
HV		 3218 /* For autoclusters with volatiles that are switched from auto to
3219 manual mode we have to update the current volatile values since
3220 those will become the initial manual values after such a switch. */
3221 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3222 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3223 update_from_auto_cluster(master);
03d5285b 3224
5d0360a4 3225 ctrl->is_new = 1;
2ccbe779
SN		 3226 return try_or_set_cluster(fh, master, true, ch_flags);
3227}
03d5285b 3228
2ccbe779
SN		 3229/* Helper function for VIDIOC_S_CTRL compatibility */
3230static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3231 struct v4l2_ext_control *c)
3232{
7a7f1ab3 3233 int ret;
2ccbe779 3234
7a7f1ab3
HV		 3235 v4l2_ctrl_lock(ctrl);
3236 user_to_new(c, ctrl);
3237 ret = set_ctrl(fh, ctrl, 0);
3238 if (!ret)
3239 cur_to_user(c, ctrl);
3240 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3241 return ret;
3242}
3243
ab892bac
HV		 3244int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3245 struct v4l2_control *control)
0996517c
HV		 3246{
3247 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3248 struct v4l2_ext_control c = { control->id };
03d5285b 3249 int ret;
0996517c 3250
d9a25471 3251 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3252 return -EINVAL;
3253
7ebbc39f
HV		 3254 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3255 return -EACCES;
3256
03d5285b 3257 c.value = control->value;
2ccbe779 3258 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3259 control->value = c.value;
3260 return ret;
0996517c
HV		 3261}
3262EXPORT_SYMBOL(v4l2_s_ctrl);
3263
0c4348ad 3264int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3265{
0c4348ad 3266 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3267
0996517c 3268 /* It's a driver bug if this happens. */
d9a25471 3269 WARN_ON(!ctrl->is_int);
5d0360a4 3270 ctrl->val = val;
7a7f1ab3 3271 return set_ctrl(NULL, ctrl, 0);
0996517c 3272}
0c4348ad 3273EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3274
0c4348ad 3275int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3276{
0c4348ad 3277 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3278
3279 /* It's a driver bug if this happens. */
998e7659 3280 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3281 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3282 return set_ctrl(NULL, ctrl, 0);
03d5285b 3283}
0c4348ad 3284EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3285
5d0360a4
HV		 3286int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3287{
3288 lockdep_assert_held(ctrl->handler->lock);
3289
3290 /* It's a driver bug if this happens. */
3291 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3292 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3293 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3294}
3295EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3296
8ac7a949
HV		 3297void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3298{
3299 if (ctrl == NULL)
3300 return;
3301 if (notify == NULL) {
3302 ctrl->call_notify = 0;
3303 return;
3304 }
3305 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3306 return;
3307 ctrl->handler->notify = notify;
3308 ctrl->handler->notify_priv = priv;
3309 ctrl->call_notify = 1;
3310}
3311EXPORT_SYMBOL(v4l2_ctrl_notify);
3312
5a573925 3313int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3314 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3315{
95ad7ff3
RR		 3316 bool value_changed;
3317 bool range_changed = false;
302ab7ce 3318 int ret;
2ccbe779 3319
5a573925
SA		 3320 lockdep_assert_held(ctrl->handler->lock);
3321
2ccbe779
SN		 3322 switch (ctrl->type) {
3323 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3324 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3325 case V4L2_CTRL_TYPE_BOOLEAN:
3326 case V4L2_CTRL_TYPE_MENU:
3327 case V4L2_CTRL_TYPE_INTEGER_MENU:
3328 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3329 case V4L2_CTRL_TYPE_U8:
3330 case V4L2_CTRL_TYPE_U16:
811c5081 3331 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3332 if (ctrl->is_array)
3333 return -EINVAL;
3334 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3335 if (ret)
3336 return ret;
3337 break;
3338 default:
3339 return -EINVAL;
3340 }
95ad7ff3
RR		 3341 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
3342 (ctrl->step != step) || ctrl->default_value != def) {
3343 range_changed = true;
3344 ctrl->minimum = min;
3345 ctrl->maximum = max;
3346 ctrl->step = step;
3347 ctrl->default_value = def;
3348 }
7a7f1ab3
HV		 3349 cur_to_new(ctrl);
3350 if (validate_new(ctrl, ctrl->p_new)) {
3351 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3352 *ctrl->p_new.p_s64 = def;
3353 else
3354 *ctrl->p_new.p_s32 = def;
3355 }
3356
3357 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 3358 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 3359 else
95ad7ff3
RR		 3360 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3361 if (value_changed)
7a7f1ab3 3362 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 3363 else if (range_changed)
2ccbe779 3364 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3365 return ret;
3366}
5a573925 3367EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3368
6e6d76cd 3369static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3370{
3e366149
HG		 3371 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3372
3373 if (ctrl == NULL)
3374 return -EINVAL;
3375
6e239399 3376 v4l2_ctrl_lock(ctrl);
77068d36 3377 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3378 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3379 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3380 struct v4l2_event ev;
c12fcfd6 3381 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3382
c12fcfd6
HV		 3383 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3384 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3385 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3386 /* Mark the queue as active, allowing this initial
3387 event to be accepted. */
3388 sev->elems = elems;
77068d36 3389 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3390 }
3391 v4l2_ctrl_unlock(ctrl);
3e366149 3392 return 0;
6e239399 3393}
6e239399 3394
3e366149 3395static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3396{
3e366149
HG		 3397 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3398
814e92b8
HV		 3399 if (ctrl == NULL)
3400 return;
3401
6e239399 3402 v4l2_ctrl_lock(ctrl);
77068d36 3403 list_del(&sev->node);
6e239399
HV		 3404 v4l2_ctrl_unlock(ctrl);
3405}
3e366149
HG		 3406
3407void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3408{
3409 u32 old_changes = old->u.ctrl.changes;
3410
3411 old->u.ctrl = new->u.ctrl;
3412 old->u.ctrl.changes |= old_changes;
3413}
3414EXPORT_SYMBOL(v4l2_ctrl_replace);
3415
3416void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3417{
3418 new->u.ctrl.changes |= old->u.ctrl.changes;
3419}
3420EXPORT_SYMBOL(v4l2_ctrl_merge);
3421
3422const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3423 .add = v4l2_ctrl_add_event,
3424 .del = v4l2_ctrl_del_event,
3425 .replace = v4l2_ctrl_replace,
3426 .merge = v4l2_ctrl_merge,
3427};
3428EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3429
3430int v4l2_ctrl_log_status(struct file *file, void *fh)
3431{
3432 struct video_device *vfd = video_devdata(file);
3433 struct v4l2_fh *vfh = file->private_data;
3434
3435 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3436 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3437 vfd->v4l2_dev->name);
3438 return 0;
3439}
3440EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3441
3442int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3443 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3444{
3445 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3446 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3447 return -EINVAL;
3448}
3449EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3450
22fa4279
SN		 3451int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3452 struct v4l2_event_subscription *sub)
3453{
3454 if (!sd->ctrl_handler)
3455 return -EINVAL;
3456 return v4l2_ctrl_subscribe_event(fh, sub);
3457}
3458EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3459
c23e0cb8 3460__poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
a26243b0
HV		 3461{
3462 struct v4l2_fh *fh = file->private_data;
3463
3464 if (v4l2_event_pending(fh))
a9a08845 3465 return EPOLLPRI;
a26243b0
HV		 3466 poll_wait(file, &fh->wait, wait);
3467 return 0;
3468}
3469EXPORT_SYMBOL(v4l2_ctrl_poll);
Linux 6.x block layer and io_uring tree(s)