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Commit | Line | Data |
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0996517c HV |
1 | /* |
2 | V4L2 controls framework implementation. | |
3 | ||
4 | Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include <linux/ctype.h> | |
2b80163c | 22 | #include <linux/slab.h> |
0996517c HV |
23 | #include <media/v4l2-ioctl.h> |
24 | #include <media/v4l2-device.h> | |
25 | #include <media/v4l2-ctrls.h> | |
6e239399 | 26 | #include <media/v4l2-event.h> |
0996517c HV |
27 | #include <media/v4l2-dev.h> |
28 | ||
ddac5c10 HV |
29 | #define has_op(master, op) \ |
30 | (master->ops && master->ops->op) | |
54c911eb | 31 | #define call_op(master, op) \ |
ddac5c10 | 32 | (has_op(master, op) ? master->ops->op(master) : 0) |
54c911eb | 33 | |
0996517c | 34 | /* Internal temporary helper struct, one for each v4l2_ext_control */ |
eb5b16ef HV |
35 | struct v4l2_ctrl_helper { |
36 | /* Pointer to the control reference of the master control */ | |
37 | struct v4l2_ctrl_ref *mref; | |
0996517c HV |
38 | /* The control corresponding to the v4l2_ext_control ID field. */ |
39 | struct v4l2_ctrl *ctrl; | |
eb5b16ef HV |
40 | /* v4l2_ext_control index of the next control belonging to the |
41 | same cluster, or 0 if there isn't any. */ | |
42 | u32 next; | |
0996517c HV |
43 | }; |
44 | ||
72d877ca HV |
45 | /* Small helper function to determine if the autocluster is set to manual |
46 | mode. In that case the is_volatile flag should be ignored. */ | |
47 | static bool is_cur_manual(const struct v4l2_ctrl *master) | |
48 | { | |
49 | return master->is_auto && master->cur.val == master->manual_mode_value; | |
50 | } | |
51 | ||
52 | /* Same as above, but this checks the against the new value instead of the | |
53 | current value. */ | |
54 | static bool is_new_manual(const struct v4l2_ctrl *master) | |
55 | { | |
56 | return master->is_auto && master->val == master->manual_mode_value; | |
57 | } | |
58 | ||
0996517c HV |
59 | /* Returns NULL or a character pointer array containing the menu for |
60 | the given control ID. The pointer array ends with a NULL pointer. | |
61 | An empty string signifies a menu entry that is invalid. This allows | |
62 | drivers to disable certain options if it is not supported. */ | |
513521ea | 63 | const char * const *v4l2_ctrl_get_menu(u32 id) |
0996517c | 64 | { |
513521ea | 65 | static const char * const mpeg_audio_sampling_freq[] = { |
0996517c HV |
66 | "44.1 kHz", |
67 | "48 kHz", | |
68 | "32 kHz", | |
69 | NULL | |
70 | }; | |
513521ea | 71 | static const char * const mpeg_audio_encoding[] = { |
0996517c HV |
72 | "MPEG-1/2 Layer I", |
73 | "MPEG-1/2 Layer II", | |
74 | "MPEG-1/2 Layer III", | |
75 | "MPEG-2/4 AAC", | |
76 | "AC-3", | |
77 | NULL | |
78 | }; | |
513521ea | 79 | static const char * const mpeg_audio_l1_bitrate[] = { |
0996517c HV |
80 | "32 kbps", |
81 | "64 kbps", | |
82 | "96 kbps", | |
83 | "128 kbps", | |
84 | "160 kbps", | |
85 | "192 kbps", | |
86 | "224 kbps", | |
87 | "256 kbps", | |
88 | "288 kbps", | |
89 | "320 kbps", | |
90 | "352 kbps", | |
91 | "384 kbps", | |
92 | "416 kbps", | |
93 | "448 kbps", | |
94 | NULL | |
95 | }; | |
513521ea | 96 | static const char * const mpeg_audio_l2_bitrate[] = { |
0996517c HV |
97 | "32 kbps", |
98 | "48 kbps", | |
99 | "56 kbps", | |
100 | "64 kbps", | |
101 | "80 kbps", | |
102 | "96 kbps", | |
103 | "112 kbps", | |
104 | "128 kbps", | |
105 | "160 kbps", | |
106 | "192 kbps", | |
107 | "224 kbps", | |
108 | "256 kbps", | |
109 | "320 kbps", | |
110 | "384 kbps", | |
111 | NULL | |
112 | }; | |
513521ea | 113 | static const char * const mpeg_audio_l3_bitrate[] = { |
0996517c HV |
114 | "32 kbps", |
115 | "40 kbps", | |
116 | "48 kbps", | |
117 | "56 kbps", | |
118 | "64 kbps", | |
119 | "80 kbps", | |
120 | "96 kbps", | |
121 | "112 kbps", | |
122 | "128 kbps", | |
123 | "160 kbps", | |
124 | "192 kbps", | |
125 | "224 kbps", | |
126 | "256 kbps", | |
127 | "320 kbps", | |
128 | NULL | |
129 | }; | |
513521ea | 130 | static const char * const mpeg_audio_ac3_bitrate[] = { |
0996517c HV |
131 | "32 kbps", |
132 | "40 kbps", | |
133 | "48 kbps", | |
134 | "56 kbps", | |
135 | "64 kbps", | |
136 | "80 kbps", | |
137 | "96 kbps", | |
138 | "112 kbps", | |
139 | "128 kbps", | |
140 | "160 kbps", | |
141 | "192 kbps", | |
142 | "224 kbps", | |
143 | "256 kbps", | |
144 | "320 kbps", | |
145 | "384 kbps", | |
146 | "448 kbps", | |
147 | "512 kbps", | |
148 | "576 kbps", | |
149 | "640 kbps", | |
150 | NULL | |
151 | }; | |
513521ea | 152 | static const char * const mpeg_audio_mode[] = { |
0996517c HV |
153 | "Stereo", |
154 | "Joint Stereo", | |
155 | "Dual", | |
156 | "Mono", | |
157 | NULL | |
158 | }; | |
513521ea | 159 | static const char * const mpeg_audio_mode_extension[] = { |
0996517c HV |
160 | "Bound 4", |
161 | "Bound 8", | |
162 | "Bound 12", | |
163 | "Bound 16", | |
164 | NULL | |
165 | }; | |
513521ea | 166 | static const char * const mpeg_audio_emphasis[] = { |
0996517c HV |
167 | "No Emphasis", |
168 | "50/15 us", | |
169 | "CCITT J17", | |
170 | NULL | |
171 | }; | |
513521ea | 172 | static const char * const mpeg_audio_crc[] = { |
0996517c HV |
173 | "No CRC", |
174 | "16-bit CRC", | |
175 | NULL | |
176 | }; | |
513521ea | 177 | static const char * const mpeg_video_encoding[] = { |
0996517c HV |
178 | "MPEG-1", |
179 | "MPEG-2", | |
180 | "MPEG-4 AVC", | |
181 | NULL | |
182 | }; | |
513521ea | 183 | static const char * const mpeg_video_aspect[] = { |
0996517c HV |
184 | "1x1", |
185 | "4x3", | |
186 | "16x9", | |
187 | "2.21x1", | |
188 | NULL | |
189 | }; | |
513521ea | 190 | static const char * const mpeg_video_bitrate_mode[] = { |
0996517c HV |
191 | "Variable Bitrate", |
192 | "Constant Bitrate", | |
193 | NULL | |
194 | }; | |
513521ea | 195 | static const char * const mpeg_stream_type[] = { |
0996517c HV |
196 | "MPEG-2 Program Stream", |
197 | "MPEG-2 Transport Stream", | |
198 | "MPEG-1 System Stream", | |
199 | "MPEG-2 DVD-compatible Stream", | |
200 | "MPEG-1 VCD-compatible Stream", | |
201 | "MPEG-2 SVCD-compatible Stream", | |
202 | NULL | |
203 | }; | |
513521ea | 204 | static const char * const mpeg_stream_vbi_fmt[] = { |
0996517c | 205 | "No VBI", |
064f5096 | 206 | "Private Packet, IVTV Format", |
0996517c HV |
207 | NULL |
208 | }; | |
513521ea | 209 | static const char * const camera_power_line_frequency[] = { |
0996517c HV |
210 | "Disabled", |
211 | "50 Hz", | |
212 | "60 Hz", | |
213 | NULL | |
214 | }; | |
513521ea | 215 | static const char * const camera_exposure_auto[] = { |
0996517c HV |
216 | "Auto Mode", |
217 | "Manual Mode", | |
218 | "Shutter Priority Mode", | |
219 | "Aperture Priority Mode", | |
220 | NULL | |
221 | }; | |
513521ea | 222 | static const char * const colorfx[] = { |
0996517c HV |
223 | "None", |
224 | "Black & White", | |
225 | "Sepia", | |
226 | "Negative", | |
227 | "Emboss", | |
228 | "Sketch", | |
064f5096 KD |
229 | "Sky Blue", |
230 | "Grass Green", | |
231 | "Skin Whiten", | |
0996517c HV |
232 | "Vivid", |
233 | NULL | |
234 | }; | |
513521ea | 235 | static const char * const tune_preemphasis[] = { |
064f5096 | 236 | "No Preemphasis", |
0996517c HV |
237 | "50 useconds", |
238 | "75 useconds", | |
239 | NULL, | |
240 | }; | |
064f5096 KD |
241 | static const char * const header_mode[] = { |
242 | "Separate Buffer", | |
243 | "Joined With 1st Frame", | |
244 | NULL, | |
245 | }; | |
246 | static const char * const multi_slice[] = { | |
247 | "Single", | |
248 | "Max Macroblocks", | |
249 | "Max Bytes", | |
250 | NULL, | |
251 | }; | |
252 | static const char * const entropy_mode[] = { | |
253 | "CAVLC", | |
254 | "CABAC", | |
255 | NULL, | |
256 | }; | |
257 | static const char * const mpeg_h264_level[] = { | |
258 | "1", | |
259 | "1b", | |
260 | "1.1", | |
261 | "1.2", | |
262 | "1.3", | |
263 | "2", | |
264 | "2.1", | |
265 | "2.2", | |
266 | "3", | |
267 | "3.1", | |
268 | "3.2", | |
269 | "4", | |
270 | "4.1", | |
271 | "4.2", | |
272 | "5", | |
273 | "5.1", | |
274 | NULL, | |
275 | }; | |
276 | static const char * const h264_loop_filter[] = { | |
277 | "Enabled", | |
278 | "Disabled", | |
279 | "Disabled at Slice Boundary", | |
280 | NULL, | |
281 | }; | |
282 | static const char * const h264_profile[] = { | |
283 | "Baseline", | |
284 | "Constrained Baseline", | |
285 | "Main", | |
286 | "Extended", | |
287 | "High", | |
288 | "High 10", | |
289 | "High 422", | |
290 | "High 444 Predictive", | |
291 | "High 10 Intra", | |
292 | "High 422 Intra", | |
293 | "High 444 Intra", | |
294 | "CAVLC 444 Intra", | |
295 | "Scalable Baseline", | |
296 | "Scalable High", | |
297 | "Scalable High Intra", | |
298 | "Multiview High", | |
299 | NULL, | |
300 | }; | |
301 | static const char * const vui_sar_idc[] = { | |
302 | "Unspecified", | |
303 | "1:1", | |
304 | "12:11", | |
305 | "10:11", | |
306 | "16:11", | |
307 | "40:33", | |
308 | "24:11", | |
309 | "20:11", | |
310 | "32:11", | |
311 | "80:33", | |
312 | "18:11", | |
313 | "15:11", | |
314 | "64:33", | |
315 | "160:99", | |
316 | "4:3", | |
317 | "3:2", | |
318 | "2:1", | |
319 | "Extended SAR", | |
320 | NULL, | |
321 | }; | |
322 | static const char * const mpeg_mpeg4_level[] = { | |
323 | "0", | |
324 | "0b", | |
325 | "1", | |
326 | "2", | |
327 | "3", | |
328 | "3b", | |
329 | "4", | |
330 | "5", | |
331 | NULL, | |
332 | }; | |
333 | static const char * const mpeg4_profile[] = { | |
334 | "Simple", | |
335 | "Adcanved Simple", | |
336 | "Core", | |
337 | "Simple Scalable", | |
338 | "Advanced Coding Efficency", | |
339 | NULL, | |
340 | }; | |
341 | ||
0b159acd SA |
342 | static const char * const flash_led_mode[] = { |
343 | "Off", | |
344 | "Flash", | |
345 | "Torch", | |
346 | NULL, | |
347 | }; | |
348 | static const char * const flash_strobe_source[] = { | |
349 | "Software", | |
350 | "External", | |
351 | NULL, | |
352 | }; | |
0996517c HV |
353 | |
354 | switch (id) { | |
355 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: | |
356 | return mpeg_audio_sampling_freq; | |
357 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
358 | return mpeg_audio_encoding; | |
359 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: | |
360 | return mpeg_audio_l1_bitrate; | |
361 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: | |
362 | return mpeg_audio_l2_bitrate; | |
363 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: | |
364 | return mpeg_audio_l3_bitrate; | |
365 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: | |
366 | return mpeg_audio_ac3_bitrate; | |
367 | case V4L2_CID_MPEG_AUDIO_MODE: | |
368 | return mpeg_audio_mode; | |
369 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: | |
370 | return mpeg_audio_mode_extension; | |
371 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: | |
372 | return mpeg_audio_emphasis; | |
373 | case V4L2_CID_MPEG_AUDIO_CRC: | |
374 | return mpeg_audio_crc; | |
375 | case V4L2_CID_MPEG_VIDEO_ENCODING: | |
376 | return mpeg_video_encoding; | |
377 | case V4L2_CID_MPEG_VIDEO_ASPECT: | |
378 | return mpeg_video_aspect; | |
379 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
380 | return mpeg_video_bitrate_mode; | |
381 | case V4L2_CID_MPEG_STREAM_TYPE: | |
382 | return mpeg_stream_type; | |
383 | case V4L2_CID_MPEG_STREAM_VBI_FMT: | |
384 | return mpeg_stream_vbi_fmt; | |
385 | case V4L2_CID_POWER_LINE_FREQUENCY: | |
386 | return camera_power_line_frequency; | |
387 | case V4L2_CID_EXPOSURE_AUTO: | |
388 | return camera_exposure_auto; | |
389 | case V4L2_CID_COLORFX: | |
390 | return colorfx; | |
391 | case V4L2_CID_TUNE_PREEMPHASIS: | |
392 | return tune_preemphasis; | |
0b159acd SA |
393 | case V4L2_CID_FLASH_LED_MODE: |
394 | return flash_led_mode; | |
395 | case V4L2_CID_FLASH_STROBE_SOURCE: | |
396 | return flash_strobe_source; | |
064f5096 KD |
397 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: |
398 | return header_mode; | |
399 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: | |
400 | return multi_slice; | |
401 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: | |
402 | return entropy_mode; | |
403 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: | |
404 | return mpeg_h264_level; | |
405 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: | |
406 | return h264_loop_filter; | |
407 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: | |
408 | return h264_profile; | |
409 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: | |
410 | return vui_sar_idc; | |
411 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: | |
412 | return mpeg_mpeg4_level; | |
413 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: | |
414 | return mpeg4_profile; | |
0996517c HV |
415 | default: |
416 | return NULL; | |
417 | } | |
418 | } | |
419 | EXPORT_SYMBOL(v4l2_ctrl_get_menu); | |
420 | ||
421 | /* Return the control name. */ | |
422 | const char *v4l2_ctrl_get_name(u32 id) | |
423 | { | |
424 | switch (id) { | |
425 | /* USER controls */ | |
6c8d6111 | 426 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
6dd5aff3 MCC |
427 | case V4L2_CID_USER_CLASS: return "User Controls"; |
428 | case V4L2_CID_BRIGHTNESS: return "Brightness"; | |
429 | case V4L2_CID_CONTRAST: return "Contrast"; | |
430 | case V4L2_CID_SATURATION: return "Saturation"; | |
431 | case V4L2_CID_HUE: return "Hue"; | |
432 | case V4L2_CID_AUDIO_VOLUME: return "Volume"; | |
433 | case V4L2_CID_AUDIO_BALANCE: return "Balance"; | |
434 | case V4L2_CID_AUDIO_BASS: return "Bass"; | |
435 | case V4L2_CID_AUDIO_TREBLE: return "Treble"; | |
436 | case V4L2_CID_AUDIO_MUTE: return "Mute"; | |
437 | case V4L2_CID_AUDIO_LOUDNESS: return "Loudness"; | |
0996517c HV |
438 | case V4L2_CID_BLACK_LEVEL: return "Black Level"; |
439 | case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic"; | |
440 | case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance"; | |
441 | case V4L2_CID_RED_BALANCE: return "Red Balance"; | |
442 | case V4L2_CID_BLUE_BALANCE: return "Blue Balance"; | |
443 | case V4L2_CID_GAMMA: return "Gamma"; | |
444 | case V4L2_CID_EXPOSURE: return "Exposure"; | |
445 | case V4L2_CID_AUTOGAIN: return "Gain, Automatic"; | |
446 | case V4L2_CID_GAIN: return "Gain"; | |
447 | case V4L2_CID_HFLIP: return "Horizontal Flip"; | |
448 | case V4L2_CID_VFLIP: return "Vertical Flip"; | |
449 | case V4L2_CID_HCENTER: return "Horizontal Center"; | |
450 | case V4L2_CID_VCENTER: return "Vertical Center"; | |
451 | case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency"; | |
452 | case V4L2_CID_HUE_AUTO: return "Hue, Automatic"; | |
453 | case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature"; | |
454 | case V4L2_CID_SHARPNESS: return "Sharpness"; | |
455 | case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation"; | |
456 | case V4L2_CID_CHROMA_AGC: return "Chroma AGC"; | |
0996517c HV |
457 | case V4L2_CID_COLOR_KILLER: return "Color Killer"; |
458 | case V4L2_CID_COLORFX: return "Color Effects"; | |
459 | case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic"; | |
460 | case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter"; | |
461 | case V4L2_CID_ROTATE: return "Rotate"; | |
462 | case V4L2_CID_BG_COLOR: return "Background Color"; | |
6c8d6111 | 463 | case V4L2_CID_CHROMA_GAIN: return "Chroma Gain"; |
008d35f2 JFM |
464 | case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1"; |
465 | case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2"; | |
064f5096 KD |
466 | case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Minimum Number of Capture Buffers"; |
467 | case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Minimum Number of Output Buffers"; | |
0996517c HV |
468 | |
469 | /* MPEG controls */ | |
6c8d6111 | 470 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
6dd5aff3 MCC |
471 | case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls"; |
472 | case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type"; | |
473 | case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID"; | |
474 | case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID"; | |
475 | case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID"; | |
476 | case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID"; | |
6c8d6111 HV |
477 | case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID"; |
478 | case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID"; | |
479 | case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format"; | |
0996517c | 480 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency"; |
6dd5aff3 MCC |
481 | case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding"; |
482 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate"; | |
483 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate"; | |
484 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate"; | |
485 | case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode"; | |
0996517c | 486 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension"; |
6dd5aff3 MCC |
487 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis"; |
488 | case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC"; | |
489 | case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute"; | |
490 | case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate"; | |
491 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate"; | |
492 | case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding"; | |
493 | case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect"; | |
494 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames"; | |
495 | case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size"; | |
496 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure"; | |
497 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown"; | |
498 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode"; | |
499 | case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate"; | |
500 | case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate"; | |
0996517c | 501 | case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation"; |
6dd5aff3 | 502 | case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute"; |
0996517c | 503 | case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV"; |
064f5096 KD |
504 | case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface"; |
505 | case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable"; | |
506 | case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "The Number of Intra Refresh MBs"; | |
507 | case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable"; | |
508 | case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control"; | |
509 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode"; | |
510 | case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "The Max Number of Reference Picture"; | |
511 | case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value"; | |
512 | case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P frame QP Value"; | |
513 | case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B frame QP Value"; | |
514 | case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value"; | |
515 | case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value"; | |
516 | case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value"; | |
517 | case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P frame QP Value"; | |
518 | case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B frame QP Value"; | |
519 | case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value"; | |
520 | case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value"; | |
521 | case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable"; | |
522 | case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size"; | |
523 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entorpy Mode"; | |
524 | case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I Period"; | |
525 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level"; | |
526 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset"; | |
527 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset"; | |
528 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode"; | |
529 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile"; | |
530 | case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR"; | |
531 | case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR"; | |
532 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable"; | |
533 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC"; | |
534 | case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value"; | |
535 | case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P frame QP Value"; | |
536 | case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B frame QP Value"; | |
537 | case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value"; | |
538 | case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value"; | |
539 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level"; | |
540 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile"; | |
541 | case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable"; | |
542 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "The Maximum Bytes Per Slice"; | |
543 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "The Number of MB in a Slice"; | |
544 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "The Slice Partitioning Method"; | |
545 | case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size"; | |
0996517c HV |
546 | |
547 | /* CAMERA controls */ | |
6c8d6111 | 548 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
0996517c HV |
549 | case V4L2_CID_CAMERA_CLASS: return "Camera Controls"; |
550 | case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure"; | |
551 | case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute"; | |
552 | case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate"; | |
553 | case V4L2_CID_PAN_RELATIVE: return "Pan, Relative"; | |
554 | case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative"; | |
555 | case V4L2_CID_PAN_RESET: return "Pan, Reset"; | |
556 | case V4L2_CID_TILT_RESET: return "Tilt, Reset"; | |
557 | case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute"; | |
558 | case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute"; | |
559 | case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute"; | |
560 | case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative"; | |
561 | case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic"; | |
0996517c HV |
562 | case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute"; |
563 | case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative"; | |
564 | case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous"; | |
565 | case V4L2_CID_PRIVACY: return "Privacy"; | |
6c8d6111 HV |
566 | case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute"; |
567 | case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative"; | |
0996517c HV |
568 | |
569 | /* FM Radio Modulator control */ | |
6c8d6111 | 570 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
0996517c HV |
571 | case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls"; |
572 | case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation"; | |
573 | case V4L2_CID_RDS_TX_PI: return "RDS Program ID"; | |
574 | case V4L2_CID_RDS_TX_PTY: return "RDS Program Type"; | |
575 | case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name"; | |
576 | case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text"; | |
577 | case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled"; | |
578 | case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time"; | |
579 | case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation"; | |
580 | case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Feature Enabled"; | |
581 | case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain"; | |
582 | case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold"; | |
583 | case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time"; | |
584 | case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time"; | |
585 | case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled"; | |
586 | case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation"; | |
587 | case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency"; | |
588 | case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-emphasis settings"; | |
589 | case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level"; | |
590 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor"; | |
591 | ||
0b159acd SA |
592 | /* Flash controls */ |
593 | case V4L2_CID_FLASH_CLASS: return "Flash controls"; | |
594 | case V4L2_CID_FLASH_LED_MODE: return "LED mode"; | |
595 | case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe source"; | |
596 | case V4L2_CID_FLASH_STROBE: return "Strobe"; | |
597 | case V4L2_CID_FLASH_STROBE_STOP: return "Stop strobe"; | |
598 | case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe status"; | |
599 | case V4L2_CID_FLASH_TIMEOUT: return "Strobe timeout"; | |
600 | case V4L2_CID_FLASH_INTENSITY: return "Intensity, flash mode"; | |
601 | case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, torch mode"; | |
602 | case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, indicator"; | |
603 | case V4L2_CID_FLASH_FAULT: return "Faults"; | |
604 | case V4L2_CID_FLASH_CHARGE: return "Charge"; | |
605 | case V4L2_CID_FLASH_READY: return "Ready to strobe"; | |
606 | ||
0996517c HV |
607 | default: |
608 | return NULL; | |
609 | } | |
610 | } | |
611 | EXPORT_SYMBOL(v4l2_ctrl_get_name); | |
612 | ||
613 | void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type, | |
614 | s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags) | |
615 | { | |
616 | *name = v4l2_ctrl_get_name(id); | |
617 | *flags = 0; | |
618 | ||
619 | switch (id) { | |
620 | case V4L2_CID_AUDIO_MUTE: | |
621 | case V4L2_CID_AUDIO_LOUDNESS: | |
622 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
623 | case V4L2_CID_AUTOGAIN: | |
624 | case V4L2_CID_HFLIP: | |
625 | case V4L2_CID_VFLIP: | |
626 | case V4L2_CID_HUE_AUTO: | |
627 | case V4L2_CID_CHROMA_AGC: | |
628 | case V4L2_CID_COLOR_KILLER: | |
629 | case V4L2_CID_MPEG_AUDIO_MUTE: | |
630 | case V4L2_CID_MPEG_VIDEO_MUTE: | |
631 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: | |
632 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: | |
633 | case V4L2_CID_EXPOSURE_AUTO_PRIORITY: | |
634 | case V4L2_CID_FOCUS_AUTO: | |
635 | case V4L2_CID_PRIVACY: | |
636 | case V4L2_CID_AUDIO_LIMITER_ENABLED: | |
637 | case V4L2_CID_AUDIO_COMPRESSION_ENABLED: | |
638 | case V4L2_CID_PILOT_TONE_ENABLED: | |
008d35f2 JFM |
639 | case V4L2_CID_ILLUMINATORS_1: |
640 | case V4L2_CID_ILLUMINATORS_2: | |
0b159acd SA |
641 | case V4L2_CID_FLASH_STROBE_STATUS: |
642 | case V4L2_CID_FLASH_CHARGE: | |
643 | case V4L2_CID_FLASH_READY: | |
064f5096 KD |
644 | case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: |
645 | case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: | |
646 | case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: | |
647 | case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: | |
648 | case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: | |
649 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: | |
650 | case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: | |
0996517c HV |
651 | *type = V4L2_CTRL_TYPE_BOOLEAN; |
652 | *min = 0; | |
653 | *max = *step = 1; | |
654 | break; | |
655 | case V4L2_CID_PAN_RESET: | |
656 | case V4L2_CID_TILT_RESET: | |
0b159acd SA |
657 | case V4L2_CID_FLASH_STROBE: |
658 | case V4L2_CID_FLASH_STROBE_STOP: | |
0996517c HV |
659 | *type = V4L2_CTRL_TYPE_BUTTON; |
660 | *flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
661 | *min = *max = *step = *def = 0; | |
662 | break; | |
663 | case V4L2_CID_POWER_LINE_FREQUENCY: | |
664 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: | |
665 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
666 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: | |
667 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: | |
668 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: | |
669 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: | |
670 | case V4L2_CID_MPEG_AUDIO_MODE: | |
671 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: | |
672 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: | |
673 | case V4L2_CID_MPEG_AUDIO_CRC: | |
674 | case V4L2_CID_MPEG_VIDEO_ENCODING: | |
675 | case V4L2_CID_MPEG_VIDEO_ASPECT: | |
676 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
677 | case V4L2_CID_MPEG_STREAM_TYPE: | |
678 | case V4L2_CID_MPEG_STREAM_VBI_FMT: | |
679 | case V4L2_CID_EXPOSURE_AUTO: | |
680 | case V4L2_CID_COLORFX: | |
681 | case V4L2_CID_TUNE_PREEMPHASIS: | |
0b159acd SA |
682 | case V4L2_CID_FLASH_LED_MODE: |
683 | case V4L2_CID_FLASH_STROBE_SOURCE: | |
064f5096 KD |
684 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: |
685 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: | |
686 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: | |
687 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: | |
688 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: | |
689 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: | |
690 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: | |
691 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: | |
692 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: | |
0996517c HV |
693 | *type = V4L2_CTRL_TYPE_MENU; |
694 | break; | |
695 | case V4L2_CID_RDS_TX_PS_NAME: | |
696 | case V4L2_CID_RDS_TX_RADIO_TEXT: | |
697 | *type = V4L2_CTRL_TYPE_STRING; | |
698 | break; | |
699 | case V4L2_CID_USER_CLASS: | |
700 | case V4L2_CID_CAMERA_CLASS: | |
701 | case V4L2_CID_MPEG_CLASS: | |
702 | case V4L2_CID_FM_TX_CLASS: | |
0b159acd | 703 | case V4L2_CID_FLASH_CLASS: |
0996517c HV |
704 | *type = V4L2_CTRL_TYPE_CTRL_CLASS; |
705 | /* You can neither read not write these */ | |
706 | *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY; | |
707 | *min = *max = *step = *def = 0; | |
708 | break; | |
709 | case V4L2_CID_BG_COLOR: | |
710 | *type = V4L2_CTRL_TYPE_INTEGER; | |
711 | *step = 1; | |
712 | *min = 0; | |
713 | /* Max is calculated as RGB888 that is 2^24 */ | |
714 | *max = 0xFFFFFF; | |
715 | break; | |
0b159acd SA |
716 | case V4L2_CID_FLASH_FAULT: |
717 | *type = V4L2_CTRL_TYPE_BITMASK; | |
718 | break; | |
064f5096 KD |
719 | case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: |
720 | case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: | |
721 | *type = V4L2_CTRL_TYPE_INTEGER; | |
722 | *flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
723 | break; | |
0996517c HV |
724 | default: |
725 | *type = V4L2_CTRL_TYPE_INTEGER; | |
726 | break; | |
727 | } | |
728 | switch (id) { | |
729 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
730 | case V4L2_CID_MPEG_AUDIO_MODE: | |
731 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
732 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: | |
733 | case V4L2_CID_MPEG_STREAM_TYPE: | |
734 | *flags |= V4L2_CTRL_FLAG_UPDATE; | |
735 | break; | |
736 | case V4L2_CID_AUDIO_VOLUME: | |
737 | case V4L2_CID_AUDIO_BALANCE: | |
738 | case V4L2_CID_AUDIO_BASS: | |
739 | case V4L2_CID_AUDIO_TREBLE: | |
740 | case V4L2_CID_BRIGHTNESS: | |
741 | case V4L2_CID_CONTRAST: | |
742 | case V4L2_CID_SATURATION: | |
743 | case V4L2_CID_HUE: | |
744 | case V4L2_CID_RED_BALANCE: | |
745 | case V4L2_CID_BLUE_BALANCE: | |
746 | case V4L2_CID_GAMMA: | |
747 | case V4L2_CID_SHARPNESS: | |
748 | case V4L2_CID_CHROMA_GAIN: | |
749 | case V4L2_CID_RDS_TX_DEVIATION: | |
750 | case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: | |
751 | case V4L2_CID_AUDIO_LIMITER_DEVIATION: | |
752 | case V4L2_CID_AUDIO_COMPRESSION_GAIN: | |
753 | case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: | |
754 | case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: | |
755 | case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: | |
756 | case V4L2_CID_PILOT_TONE_DEVIATION: | |
757 | case V4L2_CID_PILOT_TONE_FREQUENCY: | |
758 | case V4L2_CID_TUNE_POWER_LEVEL: | |
759 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: | |
760 | *flags |= V4L2_CTRL_FLAG_SLIDER; | |
761 | break; | |
762 | case V4L2_CID_PAN_RELATIVE: | |
763 | case V4L2_CID_TILT_RELATIVE: | |
764 | case V4L2_CID_FOCUS_RELATIVE: | |
765 | case V4L2_CID_IRIS_RELATIVE: | |
766 | case V4L2_CID_ZOOM_RELATIVE: | |
767 | *flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
768 | break; | |
0b159acd SA |
769 | case V4L2_CID_FLASH_STROBE_STATUS: |
770 | case V4L2_CID_FLASH_READY: | |
771 | *flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
772 | break; | |
0996517c HV |
773 | } |
774 | } | |
775 | EXPORT_SYMBOL(v4l2_ctrl_fill); | |
776 | ||
777 | /* Helper function to determine whether the control type is compatible with | |
778 | VIDIOC_G/S_CTRL. */ | |
779 | static bool type_is_int(const struct v4l2_ctrl *ctrl) | |
780 | { | |
781 | switch (ctrl->type) { | |
782 | case V4L2_CTRL_TYPE_INTEGER64: | |
783 | case V4L2_CTRL_TYPE_STRING: | |
784 | /* Nope, these need v4l2_ext_control */ | |
785 | return false; | |
786 | default: | |
787 | return true; | |
788 | } | |
789 | } | |
790 | ||
6e239399 HV |
791 | static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes) |
792 | { | |
793 | memset(ev->reserved, 0, sizeof(ev->reserved)); | |
794 | ev->type = V4L2_EVENT_CTRL; | |
795 | ev->id = ctrl->id; | |
796 | ev->u.ctrl.changes = changes; | |
797 | ev->u.ctrl.type = ctrl->type; | |
798 | ev->u.ctrl.flags = ctrl->flags; | |
799 | if (ctrl->type == V4L2_CTRL_TYPE_STRING) | |
800 | ev->u.ctrl.value64 = 0; | |
801 | else | |
802 | ev->u.ctrl.value64 = ctrl->cur.val64; | |
803 | ev->u.ctrl.minimum = ctrl->minimum; | |
804 | ev->u.ctrl.maximum = ctrl->maximum; | |
805 | if (ctrl->type == V4L2_CTRL_TYPE_MENU) | |
806 | ev->u.ctrl.step = 1; | |
807 | else | |
808 | ev->u.ctrl.step = ctrl->step; | |
809 | ev->u.ctrl.default_value = ctrl->default_value; | |
810 | } | |
811 | ||
812 | static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes) | |
813 | { | |
814 | struct v4l2_event ev; | |
77068d36 | 815 | struct v4l2_subscribed_event *sev; |
6e239399 | 816 | |
77068d36 | 817 | if (list_empty(&ctrl->ev_subs)) |
3f66f0ed | 818 | return; |
6e239399 HV |
819 | fill_event(&ev, ctrl, changes); |
820 | ||
77068d36 | 821 | list_for_each_entry(sev, &ctrl->ev_subs, node) |
60c07322 HV |
822 | if (sev->fh && (sev->fh != fh || |
823 | (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))) | |
77068d36 | 824 | v4l2_event_queue_fh(sev->fh, &ev); |
6e239399 HV |
825 | } |
826 | ||
0996517c HV |
827 | /* Helper function: copy the current control value back to the caller */ |
828 | static int cur_to_user(struct v4l2_ext_control *c, | |
829 | struct v4l2_ctrl *ctrl) | |
830 | { | |
831 | u32 len; | |
832 | ||
833 | switch (ctrl->type) { | |
834 | case V4L2_CTRL_TYPE_STRING: | |
835 | len = strlen(ctrl->cur.string); | |
836 | if (c->size < len + 1) { | |
837 | c->size = len + 1; | |
838 | return -ENOSPC; | |
839 | } | |
840 | return copy_to_user(c->string, ctrl->cur.string, | |
841 | len + 1) ? -EFAULT : 0; | |
842 | case V4L2_CTRL_TYPE_INTEGER64: | |
843 | c->value64 = ctrl->cur.val64; | |
844 | break; | |
845 | default: | |
846 | c->value = ctrl->cur.val; | |
847 | break; | |
848 | } | |
849 | return 0; | |
850 | } | |
851 | ||
852 | /* Helper function: copy the caller-provider value as the new control value */ | |
853 | static int user_to_new(struct v4l2_ext_control *c, | |
854 | struct v4l2_ctrl *ctrl) | |
855 | { | |
856 | int ret; | |
857 | u32 size; | |
858 | ||
2a863793 | 859 | ctrl->is_new = 1; |
0996517c HV |
860 | switch (ctrl->type) { |
861 | case V4L2_CTRL_TYPE_INTEGER64: | |
862 | ctrl->val64 = c->value64; | |
863 | break; | |
864 | case V4L2_CTRL_TYPE_STRING: | |
865 | size = c->size; | |
866 | if (size == 0) | |
867 | return -ERANGE; | |
868 | if (size > ctrl->maximum + 1) | |
869 | size = ctrl->maximum + 1; | |
870 | ret = copy_from_user(ctrl->string, c->string, size); | |
871 | if (!ret) { | |
872 | char last = ctrl->string[size - 1]; | |
873 | ||
874 | ctrl->string[size - 1] = 0; | |
875 | /* If the string was longer than ctrl->maximum, | |
876 | then return an error. */ | |
877 | if (strlen(ctrl->string) == ctrl->maximum && last) | |
878 | return -ERANGE; | |
879 | } | |
880 | return ret ? -EFAULT : 0; | |
881 | default: | |
882 | ctrl->val = c->value; | |
883 | break; | |
884 | } | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /* Helper function: copy the new control value back to the caller */ | |
889 | static int new_to_user(struct v4l2_ext_control *c, | |
890 | struct v4l2_ctrl *ctrl) | |
891 | { | |
892 | u32 len; | |
893 | ||
894 | switch (ctrl->type) { | |
895 | case V4L2_CTRL_TYPE_STRING: | |
896 | len = strlen(ctrl->string); | |
897 | if (c->size < len + 1) { | |
898 | c->size = ctrl->maximum + 1; | |
899 | return -ENOSPC; | |
900 | } | |
901 | return copy_to_user(c->string, ctrl->string, | |
902 | len + 1) ? -EFAULT : 0; | |
903 | case V4L2_CTRL_TYPE_INTEGER64: | |
904 | c->value64 = ctrl->val64; | |
905 | break; | |
906 | default: | |
907 | c->value = ctrl->val; | |
908 | break; | |
909 | } | |
910 | return 0; | |
911 | } | |
912 | ||
913 | /* Copy the new value to the current value. */ | |
ab892bac HV |
914 | static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, |
915 | bool update_inactive) | |
0996517c | 916 | { |
6e239399 HV |
917 | bool changed = false; |
918 | ||
0996517c HV |
919 | if (ctrl == NULL) |
920 | return; | |
921 | switch (ctrl->type) { | |
6e239399 HV |
922 | case V4L2_CTRL_TYPE_BUTTON: |
923 | changed = true; | |
924 | break; | |
0996517c HV |
925 | case V4L2_CTRL_TYPE_STRING: |
926 | /* strings are always 0-terminated */ | |
6e239399 | 927 | changed = strcmp(ctrl->string, ctrl->cur.string); |
0996517c HV |
928 | strcpy(ctrl->cur.string, ctrl->string); |
929 | break; | |
930 | case V4L2_CTRL_TYPE_INTEGER64: | |
6e239399 | 931 | changed = ctrl->val64 != ctrl->cur.val64; |
0996517c HV |
932 | ctrl->cur.val64 = ctrl->val64; |
933 | break; | |
934 | default: | |
6e239399 | 935 | changed = ctrl->val != ctrl->cur.val; |
0996517c HV |
936 | ctrl->cur.val = ctrl->val; |
937 | break; | |
938 | } | |
72d877ca HV |
939 | if (update_inactive) { |
940 | ctrl->flags &= ~V4L2_CTRL_FLAG_INACTIVE; | |
941 | if (!is_cur_manual(ctrl->cluster[0])) | |
942 | ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
943 | } | |
639884a6 HV |
944 | if (changed || update_inactive) { |
945 | /* If a control was changed that was not one of the controls | |
946 | modified by the application, then send the event to all. */ | |
947 | if (!ctrl->is_new) | |
948 | fh = NULL; | |
6e239399 HV |
949 | send_event(fh, ctrl, |
950 | (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | | |
951 | (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); | |
639884a6 | 952 | } |
0996517c HV |
953 | } |
954 | ||
955 | /* Copy the current value to the new value */ | |
956 | static void cur_to_new(struct v4l2_ctrl *ctrl) | |
957 | { | |
958 | if (ctrl == NULL) | |
959 | return; | |
960 | switch (ctrl->type) { | |
961 | case V4L2_CTRL_TYPE_STRING: | |
962 | /* strings are always 0-terminated */ | |
963 | strcpy(ctrl->string, ctrl->cur.string); | |
964 | break; | |
965 | case V4L2_CTRL_TYPE_INTEGER64: | |
966 | ctrl->val64 = ctrl->cur.val64; | |
967 | break; | |
968 | default: | |
969 | ctrl->val = ctrl->cur.val; | |
970 | break; | |
971 | } | |
972 | } | |
973 | ||
974 | /* Return non-zero if one or more of the controls in the cluster has a new | |
975 | value that differs from the current value. */ | |
976 | static int cluster_changed(struct v4l2_ctrl *master) | |
977 | { | |
978 | int diff = 0; | |
979 | int i; | |
980 | ||
981 | for (i = 0; !diff && i < master->ncontrols; i++) { | |
982 | struct v4l2_ctrl *ctrl = master->cluster[i]; | |
983 | ||
984 | if (ctrl == NULL) | |
985 | continue; | |
986 | switch (ctrl->type) { | |
987 | case V4L2_CTRL_TYPE_BUTTON: | |
988 | /* Button controls are always 'different' */ | |
989 | return 1; | |
990 | case V4L2_CTRL_TYPE_STRING: | |
991 | /* strings are always 0-terminated */ | |
992 | diff = strcmp(ctrl->string, ctrl->cur.string); | |
993 | break; | |
994 | case V4L2_CTRL_TYPE_INTEGER64: | |
995 | diff = ctrl->val64 != ctrl->cur.val64; | |
996 | break; | |
997 | default: | |
998 | diff = ctrl->val != ctrl->cur.val; | |
999 | break; | |
1000 | } | |
1001 | } | |
1002 | return diff; | |
1003 | } | |
1004 | ||
eb5b16ef HV |
1005 | /* Validate integer-type control */ |
1006 | static int validate_new_int(const struct v4l2_ctrl *ctrl, s32 *pval) | |
0996517c | 1007 | { |
eb5b16ef | 1008 | s32 val = *pval; |
0996517c | 1009 | u32 offset; |
0996517c HV |
1010 | |
1011 | switch (ctrl->type) { | |
1012 | case V4L2_CTRL_TYPE_INTEGER: | |
1013 | /* Round towards the closest legal value */ | |
1014 | val += ctrl->step / 2; | |
1015 | if (val < ctrl->minimum) | |
1016 | val = ctrl->minimum; | |
1017 | if (val > ctrl->maximum) | |
1018 | val = ctrl->maximum; | |
1019 | offset = val - ctrl->minimum; | |
1020 | offset = ctrl->step * (offset / ctrl->step); | |
1021 | val = ctrl->minimum + offset; | |
eb5b16ef | 1022 | *pval = val; |
0996517c HV |
1023 | return 0; |
1024 | ||
1025 | case V4L2_CTRL_TYPE_BOOLEAN: | |
eb5b16ef | 1026 | *pval = !!val; |
0996517c HV |
1027 | return 0; |
1028 | ||
1029 | case V4L2_CTRL_TYPE_MENU: | |
1030 | if (val < ctrl->minimum || val > ctrl->maximum) | |
1031 | return -ERANGE; | |
1032 | if (ctrl->qmenu[val][0] == '\0' || | |
1033 | (ctrl->menu_skip_mask & (1 << val))) | |
1034 | return -EINVAL; | |
1035 | return 0; | |
1036 | ||
fa4d7096 HV |
1037 | case V4L2_CTRL_TYPE_BITMASK: |
1038 | *pval &= ctrl->maximum; | |
1039 | return 0; | |
1040 | ||
0996517c HV |
1041 | case V4L2_CTRL_TYPE_BUTTON: |
1042 | case V4L2_CTRL_TYPE_CTRL_CLASS: | |
eb5b16ef | 1043 | *pval = 0; |
0996517c HV |
1044 | return 0; |
1045 | ||
eb5b16ef HV |
1046 | default: |
1047 | return -EINVAL; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | /* Validate a new control */ | |
1052 | static int validate_new(const struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c) | |
1053 | { | |
1054 | char *s = c->string; | |
1055 | size_t len; | |
1056 | ||
1057 | switch (ctrl->type) { | |
1058 | case V4L2_CTRL_TYPE_INTEGER: | |
1059 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1060 | case V4L2_CTRL_TYPE_MENU: | |
fa4d7096 | 1061 | case V4L2_CTRL_TYPE_BITMASK: |
eb5b16ef HV |
1062 | case V4L2_CTRL_TYPE_BUTTON: |
1063 | case V4L2_CTRL_TYPE_CTRL_CLASS: | |
1064 | return validate_new_int(ctrl, &c->value); | |
1065 | ||
0996517c HV |
1066 | case V4L2_CTRL_TYPE_INTEGER64: |
1067 | return 0; | |
1068 | ||
1069 | case V4L2_CTRL_TYPE_STRING: | |
1070 | len = strlen(s); | |
1071 | if (len < ctrl->minimum) | |
1072 | return -ERANGE; | |
1073 | if ((len - ctrl->minimum) % ctrl->step) | |
1074 | return -ERANGE; | |
1075 | return 0; | |
1076 | ||
1077 | default: | |
1078 | return -EINVAL; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | static inline u32 node2id(struct list_head *node) | |
1083 | { | |
1084 | return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id; | |
1085 | } | |
1086 | ||
1087 | /* Set the handler's error code if it wasn't set earlier already */ | |
1088 | static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err) | |
1089 | { | |
1090 | if (hdl->error == 0) | |
1091 | hdl->error = err; | |
1092 | return err; | |
1093 | } | |
1094 | ||
1095 | /* Initialize the handler */ | |
1096 | int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl, | |
1097 | unsigned nr_of_controls_hint) | |
1098 | { | |
1099 | mutex_init(&hdl->lock); | |
1100 | INIT_LIST_HEAD(&hdl->ctrls); | |
1101 | INIT_LIST_HEAD(&hdl->ctrl_refs); | |
1102 | hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8; | |
1103 | hdl->buckets = kzalloc(sizeof(hdl->buckets[0]) * hdl->nr_of_buckets, | |
1104 | GFP_KERNEL); | |
1105 | hdl->error = hdl->buckets ? 0 : -ENOMEM; | |
1106 | return hdl->error; | |
1107 | } | |
1108 | EXPORT_SYMBOL(v4l2_ctrl_handler_init); | |
1109 | ||
1110 | /* Free all controls and control refs */ | |
1111 | void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl) | |
1112 | { | |
1113 | struct v4l2_ctrl_ref *ref, *next_ref; | |
1114 | struct v4l2_ctrl *ctrl, *next_ctrl; | |
77068d36 | 1115 | struct v4l2_subscribed_event *sev, *next_sev; |
0996517c HV |
1116 | |
1117 | if (hdl == NULL || hdl->buckets == NULL) | |
1118 | return; | |
1119 | ||
1120 | mutex_lock(&hdl->lock); | |
1121 | /* Free all nodes */ | |
1122 | list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) { | |
1123 | list_del(&ref->node); | |
1124 | kfree(ref); | |
1125 | } | |
1126 | /* Free all controls owned by the handler */ | |
1127 | list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) { | |
1128 | list_del(&ctrl->node); | |
77068d36 HV |
1129 | list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node) |
1130 | list_del(&sev->node); | |
0996517c HV |
1131 | kfree(ctrl); |
1132 | } | |
1133 | kfree(hdl->buckets); | |
1134 | hdl->buckets = NULL; | |
1135 | hdl->cached = NULL; | |
1136 | hdl->error = 0; | |
1137 | mutex_unlock(&hdl->lock); | |
1138 | } | |
1139 | EXPORT_SYMBOL(v4l2_ctrl_handler_free); | |
1140 | ||
1141 | /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer | |
1142 | be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing | |
1143 | with applications that do not use the NEXT_CTRL flag. | |
1144 | ||
1145 | We just find the n-th private user control. It's O(N), but that should not | |
1146 | be an issue in this particular case. */ | |
1147 | static struct v4l2_ctrl_ref *find_private_ref( | |
1148 | struct v4l2_ctrl_handler *hdl, u32 id) | |
1149 | { | |
1150 | struct v4l2_ctrl_ref *ref; | |
1151 | ||
1152 | id -= V4L2_CID_PRIVATE_BASE; | |
1153 | list_for_each_entry(ref, &hdl->ctrl_refs, node) { | |
1154 | /* Search for private user controls that are compatible with | |
1155 | VIDIOC_G/S_CTRL. */ | |
1156 | if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER && | |
1157 | V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) { | |
1158 | if (!type_is_int(ref->ctrl)) | |
1159 | continue; | |
1160 | if (id == 0) | |
1161 | return ref; | |
1162 | id--; | |
1163 | } | |
1164 | } | |
1165 | return NULL; | |
1166 | } | |
1167 | ||
1168 | /* Find a control with the given ID. */ | |
1169 | static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id) | |
1170 | { | |
1171 | struct v4l2_ctrl_ref *ref; | |
1172 | int bucket; | |
1173 | ||
1174 | id &= V4L2_CTRL_ID_MASK; | |
1175 | ||
1176 | /* Old-style private controls need special handling */ | |
1177 | if (id >= V4L2_CID_PRIVATE_BASE) | |
1178 | return find_private_ref(hdl, id); | |
1179 | bucket = id % hdl->nr_of_buckets; | |
1180 | ||
1181 | /* Simple optimization: cache the last control found */ | |
1182 | if (hdl->cached && hdl->cached->ctrl->id == id) | |
1183 | return hdl->cached; | |
1184 | ||
1185 | /* Not in cache, search the hash */ | |
1186 | ref = hdl->buckets ? hdl->buckets[bucket] : NULL; | |
1187 | while (ref && ref->ctrl->id != id) | |
1188 | ref = ref->next; | |
1189 | ||
1190 | if (ref) | |
1191 | hdl->cached = ref; /* cache it! */ | |
1192 | return ref; | |
1193 | } | |
1194 | ||
1195 | /* Find a control with the given ID. Take the handler's lock first. */ | |
1196 | static struct v4l2_ctrl_ref *find_ref_lock( | |
1197 | struct v4l2_ctrl_handler *hdl, u32 id) | |
1198 | { | |
1199 | struct v4l2_ctrl_ref *ref = NULL; | |
1200 | ||
1201 | if (hdl) { | |
1202 | mutex_lock(&hdl->lock); | |
1203 | ref = find_ref(hdl, id); | |
1204 | mutex_unlock(&hdl->lock); | |
1205 | } | |
1206 | return ref; | |
1207 | } | |
1208 | ||
1209 | /* Find a control with the given ID. */ | |
1210 | struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) | |
1211 | { | |
1212 | struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); | |
1213 | ||
1214 | return ref ? ref->ctrl : NULL; | |
1215 | } | |
1216 | EXPORT_SYMBOL(v4l2_ctrl_find); | |
1217 | ||
1218 | /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */ | |
1219 | static int handler_new_ref(struct v4l2_ctrl_handler *hdl, | |
1220 | struct v4l2_ctrl *ctrl) | |
1221 | { | |
1222 | struct v4l2_ctrl_ref *ref; | |
1223 | struct v4l2_ctrl_ref *new_ref; | |
1224 | u32 id = ctrl->id; | |
1225 | u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1; | |
1226 | int bucket = id % hdl->nr_of_buckets; /* which bucket to use */ | |
1227 | ||
1228 | /* Automatically add the control class if it is not yet present. */ | |
1229 | if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL) | |
1230 | if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0)) | |
1231 | return hdl->error; | |
1232 | ||
1233 | if (hdl->error) | |
1234 | return hdl->error; | |
1235 | ||
1236 | new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL); | |
1237 | if (!new_ref) | |
1238 | return handler_set_err(hdl, -ENOMEM); | |
1239 | new_ref->ctrl = ctrl; | |
1240 | if (ctrl->handler == hdl) { | |
1241 | /* By default each control starts in a cluster of its own. | |
1242 | new_ref->ctrl is basically a cluster array with one | |
1243 | element, so that's perfect to use as the cluster pointer. | |
1244 | But only do this for the handler that owns the control. */ | |
1245 | ctrl->cluster = &new_ref->ctrl; | |
1246 | ctrl->ncontrols = 1; | |
1247 | } | |
1248 | ||
1249 | INIT_LIST_HEAD(&new_ref->node); | |
1250 | ||
1251 | mutex_lock(&hdl->lock); | |
1252 | ||
1253 | /* Add immediately at the end of the list if the list is empty, or if | |
1254 | the last element in the list has a lower ID. | |
1255 | This ensures that when elements are added in ascending order the | |
1256 | insertion is an O(1) operation. */ | |
1257 | if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) { | |
1258 | list_add_tail(&new_ref->node, &hdl->ctrl_refs); | |
1259 | goto insert_in_hash; | |
1260 | } | |
1261 | ||
1262 | /* Find insert position in sorted list */ | |
1263 | list_for_each_entry(ref, &hdl->ctrl_refs, node) { | |
1264 | if (ref->ctrl->id < id) | |
1265 | continue; | |
1266 | /* Don't add duplicates */ | |
1267 | if (ref->ctrl->id == id) { | |
1268 | kfree(new_ref); | |
1269 | goto unlock; | |
1270 | } | |
1271 | list_add(&new_ref->node, ref->node.prev); | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | insert_in_hash: | |
1276 | /* Insert the control node in the hash */ | |
1277 | new_ref->next = hdl->buckets[bucket]; | |
1278 | hdl->buckets[bucket] = new_ref; | |
1279 | ||
1280 | unlock: | |
1281 | mutex_unlock(&hdl->lock); | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | /* Add a new control */ | |
1286 | static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, | |
1287 | const struct v4l2_ctrl_ops *ops, | |
1288 | u32 id, const char *name, enum v4l2_ctrl_type type, | |
1289 | s32 min, s32 max, u32 step, s32 def, | |
513521ea | 1290 | u32 flags, const char * const *qmenu, void *priv) |
0996517c HV |
1291 | { |
1292 | struct v4l2_ctrl *ctrl; | |
1293 | unsigned sz_extra = 0; | |
1294 | ||
1295 | if (hdl->error) | |
1296 | return NULL; | |
1297 | ||
1298 | /* Sanity checks */ | |
1299 | if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE || | |
0996517c | 1300 | (type == V4L2_CTRL_TYPE_INTEGER && step == 0) || |
fa4d7096 | 1301 | (type == V4L2_CTRL_TYPE_BITMASK && max == 0) || |
0996517c HV |
1302 | (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) || |
1303 | (type == V4L2_CTRL_TYPE_STRING && max == 0)) { | |
1304 | handler_set_err(hdl, -ERANGE); | |
1305 | return NULL; | |
1306 | } | |
fa4d7096 HV |
1307 | if (type != V4L2_CTRL_TYPE_BITMASK && max < min) { |
1308 | handler_set_err(hdl, -ERANGE); | |
1309 | return NULL; | |
1310 | } | |
02ac0480 HV |
1311 | if ((type == V4L2_CTRL_TYPE_INTEGER || |
1312 | type == V4L2_CTRL_TYPE_MENU || | |
1313 | type == V4L2_CTRL_TYPE_BOOLEAN) && | |
1314 | (def < min || def > max)) { | |
1315 | handler_set_err(hdl, -ERANGE); | |
1316 | return NULL; | |
1317 | } | |
fa4d7096 HV |
1318 | if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) { |
1319 | handler_set_err(hdl, -ERANGE); | |
1320 | return NULL; | |
1321 | } | |
0996517c HV |
1322 | |
1323 | if (type == V4L2_CTRL_TYPE_BUTTON) | |
1324 | flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
1325 | else if (type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1326 | flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
1327 | else if (type == V4L2_CTRL_TYPE_STRING) | |
1328 | sz_extra += 2 * (max + 1); | |
1329 | ||
1330 | ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL); | |
1331 | if (ctrl == NULL) { | |
1332 | handler_set_err(hdl, -ENOMEM); | |
1333 | return NULL; | |
1334 | } | |
1335 | ||
1336 | INIT_LIST_HEAD(&ctrl->node); | |
77068d36 | 1337 | INIT_LIST_HEAD(&ctrl->ev_subs); |
0996517c HV |
1338 | ctrl->handler = hdl; |
1339 | ctrl->ops = ops; | |
1340 | ctrl->id = id; | |
1341 | ctrl->name = name; | |
1342 | ctrl->type = type; | |
1343 | ctrl->flags = flags; | |
1344 | ctrl->minimum = min; | |
1345 | ctrl->maximum = max; | |
1346 | ctrl->step = step; | |
1347 | ctrl->qmenu = qmenu; | |
1348 | ctrl->priv = priv; | |
1349 | ctrl->cur.val = ctrl->val = ctrl->default_value = def; | |
1350 | ||
1351 | if (ctrl->type == V4L2_CTRL_TYPE_STRING) { | |
1352 | ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1); | |
1353 | ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1); | |
1354 | if (ctrl->minimum) | |
1355 | memset(ctrl->cur.string, ' ', ctrl->minimum); | |
1356 | } | |
1357 | if (handler_new_ref(hdl, ctrl)) { | |
1358 | kfree(ctrl); | |
1359 | return NULL; | |
1360 | } | |
1361 | mutex_lock(&hdl->lock); | |
1362 | list_add_tail(&ctrl->node, &hdl->ctrls); | |
1363 | mutex_unlock(&hdl->lock); | |
1364 | return ctrl; | |
1365 | } | |
1366 | ||
1367 | struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl, | |
1368 | const struct v4l2_ctrl_config *cfg, void *priv) | |
1369 | { | |
1370 | bool is_menu; | |
1371 | struct v4l2_ctrl *ctrl; | |
1372 | const char *name = cfg->name; | |
513521ea | 1373 | const char * const *qmenu = cfg->qmenu; |
0996517c HV |
1374 | enum v4l2_ctrl_type type = cfg->type; |
1375 | u32 flags = cfg->flags; | |
1376 | s32 min = cfg->min; | |
1377 | s32 max = cfg->max; | |
1378 | u32 step = cfg->step; | |
1379 | s32 def = cfg->def; | |
1380 | ||
1381 | if (name == NULL) | |
1382 | v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step, | |
1383 | &def, &flags); | |
1384 | ||
1385 | is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU); | |
1386 | if (is_menu) | |
1387 | WARN_ON(step); | |
1388 | else | |
1389 | WARN_ON(cfg->menu_skip_mask); | |
1390 | if (is_menu && qmenu == NULL) | |
1391 | qmenu = v4l2_ctrl_get_menu(cfg->id); | |
1392 | ||
1393 | ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name, | |
1394 | type, min, max, | |
1395 | is_menu ? cfg->menu_skip_mask : step, | |
1396 | def, flags, qmenu, priv); | |
1397 | if (ctrl) { | |
1398 | ctrl->is_private = cfg->is_private; | |
1399 | ctrl->is_volatile = cfg->is_volatile; | |
1400 | } | |
1401 | return ctrl; | |
1402 | } | |
1403 | EXPORT_SYMBOL(v4l2_ctrl_new_custom); | |
1404 | ||
1405 | /* Helper function for standard non-menu controls */ | |
1406 | struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl, | |
1407 | const struct v4l2_ctrl_ops *ops, | |
1408 | u32 id, s32 min, s32 max, u32 step, s32 def) | |
1409 | { | |
1410 | const char *name; | |
1411 | enum v4l2_ctrl_type type; | |
1412 | u32 flags; | |
1413 | ||
1414 | v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); | |
1415 | if (type == V4L2_CTRL_TYPE_MENU) { | |
1416 | handler_set_err(hdl, -EINVAL); | |
1417 | return NULL; | |
1418 | } | |
1419 | return v4l2_ctrl_new(hdl, ops, id, name, type, | |
1420 | min, max, step, def, flags, NULL, NULL); | |
1421 | } | |
1422 | EXPORT_SYMBOL(v4l2_ctrl_new_std); | |
1423 | ||
1424 | /* Helper function for standard menu controls */ | |
1425 | struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl, | |
1426 | const struct v4l2_ctrl_ops *ops, | |
1427 | u32 id, s32 max, s32 mask, s32 def) | |
1428 | { | |
513521ea | 1429 | const char * const *qmenu = v4l2_ctrl_get_menu(id); |
0996517c HV |
1430 | const char *name; |
1431 | enum v4l2_ctrl_type type; | |
1432 | s32 min; | |
1433 | s32 step; | |
1434 | u32 flags; | |
1435 | ||
1436 | v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); | |
1437 | if (type != V4L2_CTRL_TYPE_MENU) { | |
1438 | handler_set_err(hdl, -EINVAL); | |
1439 | return NULL; | |
1440 | } | |
1441 | return v4l2_ctrl_new(hdl, ops, id, name, type, | |
1442 | 0, max, mask, def, flags, qmenu, NULL); | |
1443 | } | |
1444 | EXPORT_SYMBOL(v4l2_ctrl_new_std_menu); | |
1445 | ||
1446 | /* Add a control from another handler to this handler */ | |
1447 | struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl, | |
1448 | struct v4l2_ctrl *ctrl) | |
1449 | { | |
1450 | if (hdl == NULL || hdl->error) | |
1451 | return NULL; | |
1452 | if (ctrl == NULL) { | |
1453 | handler_set_err(hdl, -EINVAL); | |
1454 | return NULL; | |
1455 | } | |
1456 | if (ctrl->handler == hdl) | |
1457 | return ctrl; | |
1458 | return handler_new_ref(hdl, ctrl) ? NULL : ctrl; | |
1459 | } | |
1460 | EXPORT_SYMBOL(v4l2_ctrl_add_ctrl); | |
1461 | ||
1462 | /* Add the controls from another handler to our own. */ | |
1463 | int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, | |
1464 | struct v4l2_ctrl_handler *add) | |
1465 | { | |
1466 | struct v4l2_ctrl *ctrl; | |
1467 | int ret = 0; | |
1468 | ||
1469 | /* Do nothing if either handler is NULL or if they are the same */ | |
1470 | if (!hdl || !add || hdl == add) | |
1471 | return 0; | |
1472 | if (hdl->error) | |
1473 | return hdl->error; | |
1474 | mutex_lock(&add->lock); | |
1475 | list_for_each_entry(ctrl, &add->ctrls, node) { | |
1476 | /* Skip handler-private controls. */ | |
1477 | if (ctrl->is_private) | |
1478 | continue; | |
6e239399 HV |
1479 | /* And control classes */ |
1480 | if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1481 | continue; | |
0996517c HV |
1482 | ret = handler_new_ref(hdl, ctrl); |
1483 | if (ret) | |
1484 | break; | |
1485 | } | |
1486 | mutex_unlock(&add->lock); | |
1487 | return ret; | |
1488 | } | |
1489 | EXPORT_SYMBOL(v4l2_ctrl_add_handler); | |
1490 | ||
1491 | /* Cluster controls */ | |
1492 | void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls) | |
1493 | { | |
1494 | int i; | |
1495 | ||
1496 | /* The first control is the master control and it must not be NULL */ | |
72d877ca | 1497 | BUG_ON(ncontrols == 0 || controls[0] == NULL); |
0996517c HV |
1498 | |
1499 | for (i = 0; i < ncontrols; i++) { | |
1500 | if (controls[i]) { | |
1501 | controls[i]->cluster = controls; | |
1502 | controls[i]->ncontrols = ncontrols; | |
1503 | } | |
1504 | } | |
1505 | } | |
1506 | EXPORT_SYMBOL(v4l2_ctrl_cluster); | |
1507 | ||
72d877ca HV |
1508 | void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls, |
1509 | u8 manual_val, bool set_volatile) | |
1510 | { | |
1511 | struct v4l2_ctrl *master = controls[0]; | |
1512 | u32 flag; | |
1513 | int i; | |
1514 | ||
1515 | v4l2_ctrl_cluster(ncontrols, controls); | |
1516 | WARN_ON(ncontrols <= 1); | |
82a7c049 | 1517 | WARN_ON(manual_val < master->minimum || manual_val > master->maximum); |
72d877ca HV |
1518 | master->is_auto = true; |
1519 | master->manual_mode_value = manual_val; | |
1520 | master->flags |= V4L2_CTRL_FLAG_UPDATE; | |
1521 | flag = is_cur_manual(master) ? 0 : V4L2_CTRL_FLAG_INACTIVE; | |
1522 | ||
1523 | for (i = 1; i < ncontrols; i++) | |
1524 | if (controls[i]) { | |
1525 | controls[i]->is_volatile = set_volatile; | |
1526 | controls[i]->flags |= flag; | |
1527 | } | |
1528 | } | |
1529 | EXPORT_SYMBOL(v4l2_ctrl_auto_cluster); | |
1530 | ||
0996517c HV |
1531 | /* Activate/deactivate a control. */ |
1532 | void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active) | |
1533 | { | |
6e239399 HV |
1534 | /* invert since the actual flag is called 'inactive' */ |
1535 | bool inactive = !active; | |
1536 | bool old; | |
1537 | ||
0996517c HV |
1538 | if (ctrl == NULL) |
1539 | return; | |
1540 | ||
6e239399 | 1541 | if (inactive) |
0996517c | 1542 | /* set V4L2_CTRL_FLAG_INACTIVE */ |
6e239399 | 1543 | old = test_and_set_bit(4, &ctrl->flags); |
0996517c HV |
1544 | else |
1545 | /* clear V4L2_CTRL_FLAG_INACTIVE */ | |
6e239399 HV |
1546 | old = test_and_clear_bit(4, &ctrl->flags); |
1547 | if (old != inactive) | |
1548 | send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); | |
0996517c HV |
1549 | } |
1550 | EXPORT_SYMBOL(v4l2_ctrl_activate); | |
1551 | ||
1552 | /* Grab/ungrab a control. | |
1553 | Typically used when streaming starts and you want to grab controls, | |
1554 | preventing the user from changing them. | |
1555 | ||
1556 | Just call this and the framework will block any attempts to change | |
1557 | these controls. */ | |
1558 | void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed) | |
1559 | { | |
6e239399 HV |
1560 | bool old; |
1561 | ||
0996517c HV |
1562 | if (ctrl == NULL) |
1563 | return; | |
1564 | ||
6e239399 | 1565 | v4l2_ctrl_lock(ctrl); |
0996517c HV |
1566 | if (grabbed) |
1567 | /* set V4L2_CTRL_FLAG_GRABBED */ | |
6e239399 | 1568 | old = test_and_set_bit(1, &ctrl->flags); |
0996517c HV |
1569 | else |
1570 | /* clear V4L2_CTRL_FLAG_GRABBED */ | |
6e239399 HV |
1571 | old = test_and_clear_bit(1, &ctrl->flags); |
1572 | if (old != grabbed) | |
1573 | send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); | |
1574 | v4l2_ctrl_unlock(ctrl); | |
0996517c HV |
1575 | } |
1576 | EXPORT_SYMBOL(v4l2_ctrl_grab); | |
1577 | ||
1578 | /* Log the control name and value */ | |
1579 | static void log_ctrl(const struct v4l2_ctrl *ctrl, | |
1580 | const char *prefix, const char *colon) | |
1581 | { | |
1582 | int fl_inact = ctrl->flags & V4L2_CTRL_FLAG_INACTIVE; | |
1583 | int fl_grabbed = ctrl->flags & V4L2_CTRL_FLAG_GRABBED; | |
1584 | ||
1585 | if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY)) | |
1586 | return; | |
1587 | if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1588 | return; | |
1589 | ||
1590 | printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name); | |
1591 | ||
1592 | switch (ctrl->type) { | |
1593 | case V4L2_CTRL_TYPE_INTEGER: | |
1594 | printk(KERN_CONT "%d", ctrl->cur.val); | |
1595 | break; | |
1596 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1597 | printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false"); | |
1598 | break; | |
1599 | case V4L2_CTRL_TYPE_MENU: | |
1600 | printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]); | |
1601 | break; | |
fa4d7096 HV |
1602 | case V4L2_CTRL_TYPE_BITMASK: |
1603 | printk(KERN_CONT "0x%08x", ctrl->cur.val); | |
1604 | break; | |
0996517c HV |
1605 | case V4L2_CTRL_TYPE_INTEGER64: |
1606 | printk(KERN_CONT "%lld", ctrl->cur.val64); | |
1607 | break; | |
1608 | case V4L2_CTRL_TYPE_STRING: | |
1609 | printk(KERN_CONT "%s", ctrl->cur.string); | |
1610 | break; | |
1611 | default: | |
1612 | printk(KERN_CONT "unknown type %d", ctrl->type); | |
1613 | break; | |
1614 | } | |
1615 | if (fl_inact && fl_grabbed) | |
1616 | printk(KERN_CONT " (inactive, grabbed)\n"); | |
1617 | else if (fl_inact) | |
1618 | printk(KERN_CONT " (inactive)\n"); | |
1619 | else if (fl_grabbed) | |
1620 | printk(KERN_CONT " (grabbed)\n"); | |
1621 | else | |
1622 | printk(KERN_CONT "\n"); | |
1623 | } | |
1624 | ||
1625 | /* Log all controls owned by the handler */ | |
1626 | void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, | |
1627 | const char *prefix) | |
1628 | { | |
1629 | struct v4l2_ctrl *ctrl; | |
1630 | const char *colon = ""; | |
1631 | int len; | |
1632 | ||
1633 | if (hdl == NULL) | |
1634 | return; | |
1635 | if (prefix == NULL) | |
1636 | prefix = ""; | |
1637 | len = strlen(prefix); | |
1638 | if (len && prefix[len - 1] != ' ') | |
1639 | colon = ": "; | |
1640 | mutex_lock(&hdl->lock); | |
1641 | list_for_each_entry(ctrl, &hdl->ctrls, node) | |
1642 | if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) | |
1643 | log_ctrl(ctrl, prefix, colon); | |
1644 | mutex_unlock(&hdl->lock); | |
1645 | } | |
1646 | EXPORT_SYMBOL(v4l2_ctrl_handler_log_status); | |
1647 | ||
1648 | /* Call s_ctrl for all controls owned by the handler */ | |
1649 | int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) | |
1650 | { | |
1651 | struct v4l2_ctrl *ctrl; | |
1652 | int ret = 0; | |
1653 | ||
1654 | if (hdl == NULL) | |
1655 | return 0; | |
1656 | mutex_lock(&hdl->lock); | |
1657 | list_for_each_entry(ctrl, &hdl->ctrls, node) | |
1658 | ctrl->done = false; | |
1659 | ||
1660 | list_for_each_entry(ctrl, &hdl->ctrls, node) { | |
1661 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
1662 | int i; | |
1663 | ||
1664 | /* Skip if this control was already handled by a cluster. */ | |
71c6c4c9 HV |
1665 | /* Skip button controls and read-only controls. */ |
1666 | if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON || | |
1667 | (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)) | |
0996517c HV |
1668 | continue; |
1669 | ||
2a863793 HV |
1670 | for (i = 0; i < master->ncontrols; i++) { |
1671 | if (master->cluster[i]) { | |
1672 | cur_to_new(master->cluster[i]); | |
1673 | master->cluster[i]->is_new = 1; | |
71c6c4c9 | 1674 | master->cluster[i]->done = true; |
2a863793 HV |
1675 | } |
1676 | } | |
54c911eb | 1677 | ret = call_op(master, s_ctrl); |
0996517c HV |
1678 | if (ret) |
1679 | break; | |
0996517c HV |
1680 | } |
1681 | mutex_unlock(&hdl->lock); | |
1682 | return ret; | |
1683 | } | |
1684 | EXPORT_SYMBOL(v4l2_ctrl_handler_setup); | |
1685 | ||
1686 | /* Implement VIDIOC_QUERYCTRL */ | |
1687 | int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc) | |
1688 | { | |
1689 | u32 id = qc->id & V4L2_CTRL_ID_MASK; | |
1690 | struct v4l2_ctrl_ref *ref; | |
1691 | struct v4l2_ctrl *ctrl; | |
1692 | ||
1693 | if (hdl == NULL) | |
1694 | return -EINVAL; | |
1695 | ||
1696 | mutex_lock(&hdl->lock); | |
1697 | ||
1698 | /* Try to find it */ | |
1699 | ref = find_ref(hdl, id); | |
1700 | ||
1701 | if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) { | |
1702 | /* Find the next control with ID > qc->id */ | |
1703 | ||
1704 | /* Did we reach the end of the control list? */ | |
1705 | if (id >= node2id(hdl->ctrl_refs.prev)) { | |
1706 | ref = NULL; /* Yes, so there is no next control */ | |
1707 | } else if (ref) { | |
1708 | /* We found a control with the given ID, so just get | |
1709 | the next one in the list. */ | |
1710 | ref = list_entry(ref->node.next, typeof(*ref), node); | |
1711 | } else { | |
1712 | /* No control with the given ID exists, so start | |
1713 | searching for the next largest ID. We know there | |
1714 | is one, otherwise the first 'if' above would have | |
1715 | been true. */ | |
1716 | list_for_each_entry(ref, &hdl->ctrl_refs, node) | |
1717 | if (id < ref->ctrl->id) | |
1718 | break; | |
1719 | } | |
1720 | } | |
1721 | mutex_unlock(&hdl->lock); | |
1722 | if (!ref) | |
1723 | return -EINVAL; | |
1724 | ||
1725 | ctrl = ref->ctrl; | |
1726 | memset(qc, 0, sizeof(*qc)); | |
829fb2dc HV |
1727 | if (id >= V4L2_CID_PRIVATE_BASE) |
1728 | qc->id = id; | |
1729 | else | |
1730 | qc->id = ctrl->id; | |
0996517c HV |
1731 | strlcpy(qc->name, ctrl->name, sizeof(qc->name)); |
1732 | qc->minimum = ctrl->minimum; | |
1733 | qc->maximum = ctrl->maximum; | |
1734 | qc->default_value = ctrl->default_value; | |
eac9aa00 | 1735 | if (ctrl->type == V4L2_CTRL_TYPE_MENU) |
0996517c HV |
1736 | qc->step = 1; |
1737 | else | |
1738 | qc->step = ctrl->step; | |
1739 | qc->flags = ctrl->flags; | |
1740 | qc->type = ctrl->type; | |
1741 | return 0; | |
1742 | } | |
1743 | EXPORT_SYMBOL(v4l2_queryctrl); | |
1744 | ||
1745 | int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) | |
1746 | { | |
87a0c94c HV |
1747 | if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) |
1748 | return -EINVAL; | |
0996517c HV |
1749 | return v4l2_queryctrl(sd->ctrl_handler, qc); |
1750 | } | |
1751 | EXPORT_SYMBOL(v4l2_subdev_queryctrl); | |
1752 | ||
1753 | /* Implement VIDIOC_QUERYMENU */ | |
1754 | int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm) | |
1755 | { | |
1756 | struct v4l2_ctrl *ctrl; | |
1757 | u32 i = qm->index; | |
1758 | ||
1759 | ctrl = v4l2_ctrl_find(hdl, qm->id); | |
1760 | if (!ctrl) | |
1761 | return -EINVAL; | |
1762 | ||
1763 | qm->reserved = 0; | |
1764 | /* Sanity checks */ | |
1765 | if (ctrl->qmenu == NULL || | |
1766 | i < ctrl->minimum || i > ctrl->maximum) | |
1767 | return -EINVAL; | |
1768 | /* Use mask to see if this menu item should be skipped */ | |
1769 | if (ctrl->menu_skip_mask & (1 << i)) | |
1770 | return -EINVAL; | |
1771 | /* Empty menu items should also be skipped */ | |
1772 | if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0') | |
1773 | return -EINVAL; | |
1774 | strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name)); | |
1775 | return 0; | |
1776 | } | |
1777 | EXPORT_SYMBOL(v4l2_querymenu); | |
1778 | ||
1779 | int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm) | |
1780 | { | |
1781 | return v4l2_querymenu(sd->ctrl_handler, qm); | |
1782 | } | |
1783 | EXPORT_SYMBOL(v4l2_subdev_querymenu); | |
1784 | ||
1785 | ||
1786 | ||
1787 | /* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS: | |
1788 | ||
1789 | It is not a fully atomic operation, just best-effort only. After all, if | |
1790 | multiple controls have to be set through multiple i2c writes (for example) | |
1791 | then some initial writes may succeed while others fail. Thus leaving the | |
1792 | system in an inconsistent state. The question is how much effort you are | |
1793 | willing to spend on trying to make something atomic that really isn't. | |
1794 | ||
1795 | From the point of view of an application the main requirement is that | |
1796 | when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an | |
1797 | error should be returned without actually affecting any controls. | |
1798 | ||
1799 | If all the values are correct, then it is acceptable to just give up | |
1800 | in case of low-level errors. | |
1801 | ||
1802 | It is important though that the application can tell when only a partial | |
1803 | configuration was done. The way we do that is through the error_idx field | |
1804 | of struct v4l2_ext_controls: if that is equal to the count field then no | |
1805 | controls were affected. Otherwise all controls before that index were | |
1806 | successful in performing their 'get' or 'set' operation, the control at | |
1807 | the given index failed, and you don't know what happened with the controls | |
1808 | after the failed one. Since if they were part of a control cluster they | |
1809 | could have been successfully processed (if a cluster member was encountered | |
1810 | at index < error_idx), they could have failed (if a cluster member was at | |
1811 | error_idx), or they may not have been processed yet (if the first cluster | |
1812 | member appeared after error_idx). | |
1813 | ||
1814 | It is all fairly theoretical, though. In practice all you can do is to | |
1815 | bail out. If error_idx == count, then it is an application bug. If | |
1816 | error_idx < count then it is only an application bug if the error code was | |
1817 | EBUSY. That usually means that something started streaming just when you | |
1818 | tried to set the controls. In all other cases it is a driver/hardware | |
1819 | problem and all you can do is to retry or bail out. | |
1820 | ||
1821 | Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that | |
1822 | never modifies controls the error_idx is just set to whatever control | |
1823 | has an invalid value. | |
1824 | */ | |
1825 | ||
1826 | /* Prepare for the extended g/s/try functions. | |
1827 | Find the controls in the control array and do some basic checks. */ | |
1828 | static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl, | |
1829 | struct v4l2_ext_controls *cs, | |
eb5b16ef | 1830 | struct v4l2_ctrl_helper *helpers) |
0996517c | 1831 | { |
eb5b16ef HV |
1832 | struct v4l2_ctrl_helper *h; |
1833 | bool have_clusters = false; | |
0996517c HV |
1834 | u32 i; |
1835 | ||
eb5b16ef | 1836 | for (i = 0, h = helpers; i < cs->count; i++, h++) { |
0996517c | 1837 | struct v4l2_ext_control *c = &cs->controls[i]; |
eb5b16ef | 1838 | struct v4l2_ctrl_ref *ref; |
0996517c HV |
1839 | struct v4l2_ctrl *ctrl; |
1840 | u32 id = c->id & V4L2_CTRL_ID_MASK; | |
1841 | ||
37cd3b73 | 1842 | cs->error_idx = i; |
0996517c HV |
1843 | |
1844 | if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class) | |
1845 | return -EINVAL; | |
1846 | ||
1847 | /* Old-style private controls are not allowed for | |
1848 | extended controls */ | |
1849 | if (id >= V4L2_CID_PRIVATE_BASE) | |
1850 | return -EINVAL; | |
eb5b16ef HV |
1851 | ref = find_ref_lock(hdl, id); |
1852 | if (ref == NULL) | |
0996517c | 1853 | return -EINVAL; |
eb5b16ef | 1854 | ctrl = ref->ctrl; |
0996517c HV |
1855 | if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) |
1856 | return -EINVAL; | |
1857 | ||
eb5b16ef HV |
1858 | if (ctrl->cluster[0]->ncontrols > 1) |
1859 | have_clusters = true; | |
1860 | if (ctrl->cluster[0] != ctrl) | |
1861 | ref = find_ref_lock(hdl, ctrl->cluster[0]->id); | |
1862 | /* Store the ref to the master control of the cluster */ | |
1863 | h->mref = ref; | |
1864 | h->ctrl = ctrl; | |
1865 | /* Initially set next to 0, meaning that there is no other | |
1866 | control in this helper array belonging to the same | |
1867 | cluster */ | |
1868 | h->next = 0; | |
0996517c | 1869 | } |
0996517c | 1870 | |
eb5b16ef HV |
1871 | /* We are done if there were no controls that belong to a multi- |
1872 | control cluster. */ | |
1873 | if (!have_clusters) | |
1874 | return 0; | |
0996517c | 1875 | |
eb5b16ef HV |
1876 | /* The code below figures out in O(n) time which controls in the list |
1877 | belong to the same cluster. */ | |
0996517c | 1878 | |
eb5b16ef HV |
1879 | /* This has to be done with the handler lock taken. */ |
1880 | mutex_lock(&hdl->lock); | |
0996517c | 1881 | |
eb5b16ef HV |
1882 | /* First zero the helper field in the master control references */ |
1883 | for (i = 0; i < cs->count; i++) | |
1884 | helpers[i].mref->helper = 0; | |
1885 | for (i = 0, h = helpers; i < cs->count; i++, h++) { | |
1886 | struct v4l2_ctrl_ref *mref = h->mref; | |
1887 | ||
1888 | /* If the mref->helper is set, then it points to an earlier | |
1889 | helper that belongs to the same cluster. */ | |
1890 | if (mref->helper) { | |
1891 | /* Set the next field of mref->helper to the current | |
1892 | index: this means that that earlier helper now | |
1893 | points to the next helper in the same cluster. */ | |
1894 | mref->helper->next = i; | |
1895 | /* mref should be set only for the first helper in the | |
1896 | cluster, clear the others. */ | |
1897 | h->mref = NULL; | |
1898 | } | |
1899 | /* Point the mref helper to the current helper struct. */ | |
1900 | mref->helper = h; | |
0996517c | 1901 | } |
eb5b16ef HV |
1902 | mutex_unlock(&hdl->lock); |
1903 | return 0; | |
0996517c HV |
1904 | } |
1905 | ||
1906 | /* Handles the corner case where cs->count == 0. It checks whether the | |
1907 | specified control class exists. If that class ID is 0, then it checks | |
1908 | whether there are any controls at all. */ | |
1909 | static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class) | |
1910 | { | |
1911 | if (ctrl_class == 0) | |
1912 | return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0; | |
1913 | return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL; | |
1914 | } | |
1915 | ||
1916 | ||
1917 | ||
1918 | /* Get extended controls. Allocates the helpers array if needed. */ | |
1919 | int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs) | |
1920 | { | |
eb5b16ef HV |
1921 | struct v4l2_ctrl_helper helper[4]; |
1922 | struct v4l2_ctrl_helper *helpers = helper; | |
0996517c | 1923 | int ret; |
ddac5c10 | 1924 | int i, j; |
0996517c HV |
1925 | |
1926 | cs->error_idx = cs->count; | |
1927 | cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class); | |
1928 | ||
1929 | if (hdl == NULL) | |
1930 | return -EINVAL; | |
1931 | ||
1932 | if (cs->count == 0) | |
1933 | return class_check(hdl, cs->ctrl_class); | |
1934 | ||
1935 | if (cs->count > ARRAY_SIZE(helper)) { | |
1936 | helpers = kmalloc(sizeof(helper[0]) * cs->count, GFP_KERNEL); | |
1937 | if (helpers == NULL) | |
1938 | return -ENOMEM; | |
1939 | } | |
1940 | ||
37cd3b73 HV |
1941 | ret = prepare_ext_ctrls(hdl, cs, helpers); |
1942 | cs->error_idx = cs->count; | |
0996517c HV |
1943 | |
1944 | for (i = 0; !ret && i < cs->count; i++) | |
1945 | if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) | |
1946 | ret = -EACCES; | |
1947 | ||
1948 | for (i = 0; !ret && i < cs->count; i++) { | |
eb5b16ef HV |
1949 | int (*ctrl_to_user)(struct v4l2_ext_control *c, |
1950 | struct v4l2_ctrl *ctrl) = cur_to_user; | |
1951 | struct v4l2_ctrl *master; | |
0996517c | 1952 | |
eb5b16ef | 1953 | if (helpers[i].mref == NULL) |
0996517c HV |
1954 | continue; |
1955 | ||
eb5b16ef | 1956 | master = helpers[i].mref->ctrl; |
0996517c HV |
1957 | cs->error_idx = i; |
1958 | ||
1959 | v4l2_ctrl_lock(master); | |
ddac5c10 HV |
1960 | |
1961 | /* g_volatile_ctrl will update the new control values */ | |
eb5b16ef | 1962 | if (has_op(master, g_volatile_ctrl) && !is_cur_manual(master)) { |
ddac5c10 HV |
1963 | for (j = 0; j < master->ncontrols; j++) |
1964 | cur_to_new(master->cluster[j]); | |
54c911eb | 1965 | ret = call_op(master, g_volatile_ctrl); |
eb5b16ef | 1966 | ctrl_to_user = new_to_user; |
ddac5c10 HV |
1967 | } |
1968 | /* If OK, then copy the current (for non-volatile controls) | |
1969 | or the new (for volatile controls) control values to the | |
1970 | caller */ | |
eb5b16ef HV |
1971 | if (!ret) { |
1972 | u32 idx = i; | |
1973 | ||
1974 | do { | |
1975 | ret = ctrl_to_user(cs->controls + idx, | |
1976 | helpers[idx].ctrl); | |
1977 | idx = helpers[idx].next; | |
1978 | } while (!ret && idx); | |
1979 | } | |
0996517c | 1980 | v4l2_ctrl_unlock(master); |
0996517c HV |
1981 | } |
1982 | ||
1983 | if (cs->count > ARRAY_SIZE(helper)) | |
1984 | kfree(helpers); | |
1985 | return ret; | |
1986 | } | |
1987 | EXPORT_SYMBOL(v4l2_g_ext_ctrls); | |
1988 | ||
1989 | int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
1990 | { | |
1991 | return v4l2_g_ext_ctrls(sd->ctrl_handler, cs); | |
1992 | } | |
1993 | EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls); | |
1994 | ||
1995 | /* Helper function to get a single control */ | |
1996 | static int get_ctrl(struct v4l2_ctrl *ctrl, s32 *val) | |
1997 | { | |
1998 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
1999 | int ret = 0; | |
ddac5c10 | 2000 | int i; |
0996517c HV |
2001 | |
2002 | if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) | |
2003 | return -EACCES; | |
2004 | ||
2005 | v4l2_ctrl_lock(master); | |
2006 | /* g_volatile_ctrl will update the current control values */ | |
72d877ca | 2007 | if (ctrl->is_volatile && !is_cur_manual(master)) { |
ddac5c10 HV |
2008 | for (i = 0; i < master->ncontrols; i++) |
2009 | cur_to_new(master->cluster[i]); | |
54c911eb | 2010 | ret = call_op(master, g_volatile_ctrl); |
ddac5c10 HV |
2011 | *val = ctrl->val; |
2012 | } else { | |
2013 | *val = ctrl->cur.val; | |
2014 | } | |
0996517c HV |
2015 | v4l2_ctrl_unlock(master); |
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control) | |
2020 | { | |
2021 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); | |
2022 | ||
2023 | if (ctrl == NULL || !type_is_int(ctrl)) | |
2024 | return -EINVAL; | |
2025 | return get_ctrl(ctrl, &control->value); | |
2026 | } | |
2027 | EXPORT_SYMBOL(v4l2_g_ctrl); | |
2028 | ||
2029 | int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control) | |
2030 | { | |
2031 | return v4l2_g_ctrl(sd->ctrl_handler, control); | |
2032 | } | |
2033 | EXPORT_SYMBOL(v4l2_subdev_g_ctrl); | |
2034 | ||
2035 | s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl) | |
2036 | { | |
2037 | s32 val = 0; | |
2038 | ||
2039 | /* It's a driver bug if this happens. */ | |
2040 | WARN_ON(!type_is_int(ctrl)); | |
2041 | get_ctrl(ctrl, &val); | |
2042 | return val; | |
2043 | } | |
2044 | EXPORT_SYMBOL(v4l2_ctrl_g_ctrl); | |
2045 | ||
2046 | ||
2047 | /* Core function that calls try/s_ctrl and ensures that the new value is | |
2048 | copied to the current value on a set. | |
2049 | Must be called with ctrl->handler->lock held. */ | |
e6402585 HV |
2050 | static int try_or_set_cluster(struct v4l2_fh *fh, |
2051 | struct v4l2_ctrl *master, bool set) | |
0996517c | 2052 | { |
72d877ca | 2053 | bool update_flag; |
eb5b16ef | 2054 | int ret; |
0996517c HV |
2055 | int i; |
2056 | ||
2057 | /* Go through the cluster and either validate the new value or | |
2058 | (if no new value was set), copy the current value to the new | |
2059 | value, ensuring a consistent view for the control ops when | |
2060 | called. */ | |
eb5b16ef | 2061 | for (i = 0; i < master->ncontrols; i++) { |
0996517c HV |
2062 | struct v4l2_ctrl *ctrl = master->cluster[i]; |
2063 | ||
2064 | if (ctrl == NULL) | |
2065 | continue; | |
2066 | ||
eb5b16ef HV |
2067 | if (!ctrl->is_new) { |
2068 | cur_to_new(ctrl); | |
0996517c HV |
2069 | continue; |
2070 | } | |
eb5b16ef HV |
2071 | /* Check again: it may have changed since the |
2072 | previous check in try_or_set_ext_ctrls(). */ | |
2073 | if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) | |
2074 | return -EBUSY; | |
0996517c HV |
2075 | } |
2076 | ||
eb5b16ef | 2077 | ret = call_op(master, try_ctrl); |
0996517c HV |
2078 | |
2079 | /* Don't set if there is no change */ | |
72d877ca HV |
2080 | if (ret || !set || !cluster_changed(master)) |
2081 | return ret; | |
2082 | ret = call_op(master, s_ctrl); | |
72d877ca HV |
2083 | if (ret) |
2084 | return ret; | |
2085 | ||
eb5b16ef | 2086 | /* If OK, then make the new values permanent. */ |
72d877ca HV |
2087 | update_flag = is_cur_manual(master) != is_new_manual(master); |
2088 | for (i = 0; i < master->ncontrols; i++) | |
ab892bac | 2089 | new_to_cur(fh, master->cluster[i], update_flag && i > 0); |
72d877ca | 2090 | return 0; |
0996517c HV |
2091 | } |
2092 | ||
e6402585 HV |
2093 | /* Validate controls. */ |
2094 | static int validate_ctrls(struct v4l2_ext_controls *cs, | |
2095 | struct v4l2_ctrl_helper *helpers, bool set) | |
0996517c | 2096 | { |
e6402585 | 2097 | unsigned i; |
0996517c HV |
2098 | int ret = 0; |
2099 | ||
eb5b16ef | 2100 | cs->error_idx = cs->count; |
0996517c HV |
2101 | for (i = 0; i < cs->count; i++) { |
2102 | struct v4l2_ctrl *ctrl = helpers[i].ctrl; | |
2103 | ||
e6402585 | 2104 | cs->error_idx = i; |
0996517c HV |
2105 | |
2106 | if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) | |
2107 | return -EACCES; | |
2108 | /* This test is also done in try_set_control_cluster() which | |
2109 | is called in atomic context, so that has the final say, | |
2110 | but it makes sense to do an up-front check as well. Once | |
2111 | an error occurs in try_set_control_cluster() some other | |
2112 | controls may have been set already and we want to do a | |
2113 | best-effort to avoid that. */ | |
2114 | if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) | |
2115 | return -EBUSY; | |
eb5b16ef HV |
2116 | ret = validate_new(ctrl, &cs->controls[i]); |
2117 | if (ret) | |
2118 | return ret; | |
0996517c | 2119 | } |
e6402585 HV |
2120 | return 0; |
2121 | } | |
2122 | ||
2123 | /* Try or try-and-set controls */ | |
2124 | static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, | |
2125 | struct v4l2_ext_controls *cs, | |
2126 | bool set) | |
2127 | { | |
2128 | struct v4l2_ctrl_helper helper[4]; | |
2129 | struct v4l2_ctrl_helper *helpers = helper; | |
2130 | unsigned i, j; | |
2131 | int ret; | |
2132 | ||
2133 | cs->error_idx = cs->count; | |
2134 | cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class); | |
2135 | ||
2136 | if (hdl == NULL) | |
2137 | return -EINVAL; | |
2138 | ||
2139 | if (cs->count == 0) | |
2140 | return class_check(hdl, cs->ctrl_class); | |
0996517c | 2141 | |
e6402585 HV |
2142 | if (cs->count > ARRAY_SIZE(helper)) { |
2143 | helpers = kmalloc(sizeof(helper[0]) * cs->count, GFP_KERNEL); | |
2144 | if (!helpers) | |
2145 | return -ENOMEM; | |
2146 | } | |
2147 | ret = prepare_ext_ctrls(hdl, cs, helpers); | |
2148 | if (!ret) | |
2149 | ret = validate_ctrls(cs, helpers, set); | |
2150 | if (ret && set) | |
2151 | cs->error_idx = cs->count; | |
0996517c | 2152 | for (i = 0; !ret && i < cs->count; i++) { |
eb5b16ef HV |
2153 | struct v4l2_ctrl *master; |
2154 | u32 idx = i; | |
0996517c | 2155 | |
eb5b16ef | 2156 | if (helpers[i].mref == NULL) |
0996517c HV |
2157 | continue; |
2158 | ||
37cd3b73 | 2159 | cs->error_idx = i; |
eb5b16ef HV |
2160 | master = helpers[i].mref->ctrl; |
2161 | v4l2_ctrl_lock(master); | |
0996517c | 2162 | |
2a863793 | 2163 | /* Reset the 'is_new' flags of the cluster */ |
0996517c HV |
2164 | for (j = 0; j < master->ncontrols; j++) |
2165 | if (master->cluster[j]) | |
2a863793 | 2166 | master->cluster[j]->is_new = 0; |
0996517c HV |
2167 | |
2168 | /* Copy the new caller-supplied control values. | |
2a863793 | 2169 | user_to_new() sets 'is_new' to 1. */ |
eb5b16ef HV |
2170 | do { |
2171 | ret = user_to_new(cs->controls + idx, helpers[idx].ctrl); | |
2172 | idx = helpers[idx].next; | |
2173 | } while (!ret && idx); | |
0996517c HV |
2174 | |
2175 | if (!ret) | |
e6402585 | 2176 | ret = try_or_set_cluster(fh, master, set); |
0996517c HV |
2177 | |
2178 | /* Copy the new values back to userspace. */ | |
eb5b16ef HV |
2179 | if (!ret) { |
2180 | idx = i; | |
2181 | do { | |
adf41b9b | 2182 | ret = new_to_user(cs->controls + idx, |
e6402585 | 2183 | helpers[idx].ctrl); |
eb5b16ef HV |
2184 | idx = helpers[idx].next; |
2185 | } while (!ret && idx); | |
2186 | } | |
2187 | v4l2_ctrl_unlock(master); | |
0996517c | 2188 | } |
0996517c | 2189 | |
0996517c HV |
2190 | if (cs->count > ARRAY_SIZE(helper)) |
2191 | kfree(helpers); | |
2192 | return ret; | |
2193 | } | |
2194 | ||
2195 | int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs) | |
2196 | { | |
ab892bac | 2197 | return try_set_ext_ctrls(NULL, hdl, cs, false); |
0996517c HV |
2198 | } |
2199 | EXPORT_SYMBOL(v4l2_try_ext_ctrls); | |
2200 | ||
ab892bac HV |
2201 | int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, |
2202 | struct v4l2_ext_controls *cs) | |
0996517c | 2203 | { |
ab892bac | 2204 | return try_set_ext_ctrls(fh, hdl, cs, true); |
0996517c HV |
2205 | } |
2206 | EXPORT_SYMBOL(v4l2_s_ext_ctrls); | |
2207 | ||
2208 | int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
2209 | { | |
ab892bac | 2210 | return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false); |
0996517c HV |
2211 | } |
2212 | EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls); | |
2213 | ||
2214 | int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
2215 | { | |
ab892bac | 2216 | return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true); |
0996517c HV |
2217 | } |
2218 | EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls); | |
2219 | ||
2220 | /* Helper function for VIDIOC_S_CTRL compatibility */ | |
ab892bac | 2221 | static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, s32 *val) |
0996517c HV |
2222 | { |
2223 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
2224 | int ret; | |
2225 | int i; | |
2226 | ||
eb5b16ef HV |
2227 | ret = validate_new_int(ctrl, val); |
2228 | if (ret) | |
2229 | return ret; | |
2230 | ||
0996517c HV |
2231 | v4l2_ctrl_lock(ctrl); |
2232 | ||
2a863793 | 2233 | /* Reset the 'is_new' flags of the cluster */ |
0996517c HV |
2234 | for (i = 0; i < master->ncontrols; i++) |
2235 | if (master->cluster[i]) | |
2a863793 | 2236 | master->cluster[i]->is_new = 0; |
0996517c HV |
2237 | |
2238 | ctrl->val = *val; | |
2a863793 | 2239 | ctrl->is_new = 1; |
e6402585 | 2240 | ret = try_or_set_cluster(fh, master, true); |
0996517c HV |
2241 | *val = ctrl->cur.val; |
2242 | v4l2_ctrl_unlock(ctrl); | |
2243 | return ret; | |
2244 | } | |
2245 | ||
ab892bac HV |
2246 | int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, |
2247 | struct v4l2_control *control) | |
0996517c HV |
2248 | { |
2249 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); | |
2250 | ||
2251 | if (ctrl == NULL || !type_is_int(ctrl)) | |
2252 | return -EINVAL; | |
2253 | ||
7ebbc39f HV |
2254 | if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) |
2255 | return -EACCES; | |
2256 | ||
ab892bac | 2257 | return set_ctrl(fh, ctrl, &control->value); |
0996517c HV |
2258 | } |
2259 | EXPORT_SYMBOL(v4l2_s_ctrl); | |
2260 | ||
2261 | int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control) | |
2262 | { | |
ab892bac | 2263 | return v4l2_s_ctrl(NULL, sd->ctrl_handler, control); |
0996517c HV |
2264 | } |
2265 | EXPORT_SYMBOL(v4l2_subdev_s_ctrl); | |
2266 | ||
2267 | int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val) | |
2268 | { | |
2269 | /* It's a driver bug if this happens. */ | |
2270 | WARN_ON(!type_is_int(ctrl)); | |
ab892bac | 2271 | return set_ctrl(NULL, ctrl, &val); |
0996517c HV |
2272 | } |
2273 | EXPORT_SYMBOL(v4l2_ctrl_s_ctrl); | |
6e239399 | 2274 | |
77068d36 HV |
2275 | void v4l2_ctrl_add_event(struct v4l2_ctrl *ctrl, |
2276 | struct v4l2_subscribed_event *sev) | |
6e239399 | 2277 | { |
6e239399 | 2278 | v4l2_ctrl_lock(ctrl); |
77068d36 | 2279 | list_add_tail(&sev->node, &ctrl->ev_subs); |
6e239399 | 2280 | if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS && |
77068d36 | 2281 | (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) { |
6e239399 | 2282 | struct v4l2_event ev; |
c12fcfd6 | 2283 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; |
6e239399 | 2284 | |
c12fcfd6 HV |
2285 | if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)) |
2286 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
2287 | fill_event(&ev, ctrl, changes); | |
77068d36 | 2288 | v4l2_event_queue_fh(sev->fh, &ev); |
6e239399 HV |
2289 | } |
2290 | v4l2_ctrl_unlock(ctrl); | |
2291 | } | |
77068d36 | 2292 | EXPORT_SYMBOL(v4l2_ctrl_add_event); |
6e239399 | 2293 | |
77068d36 HV |
2294 | void v4l2_ctrl_del_event(struct v4l2_ctrl *ctrl, |
2295 | struct v4l2_subscribed_event *sev) | |
6e239399 | 2296 | { |
6e239399 | 2297 | v4l2_ctrl_lock(ctrl); |
77068d36 | 2298 | list_del(&sev->node); |
6e239399 HV |
2299 | v4l2_ctrl_unlock(ctrl); |
2300 | } | |
77068d36 | 2301 | EXPORT_SYMBOL(v4l2_ctrl_del_event); |