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2a1fcdf0 HV |
1 | /* |
2 | V4L2 device support header. | |
3 | ||
4 | Copyright (C) 2008 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 | #ifndef _V4L2_DEVICE_H | |
22 | #define _V4L2_DEVICE_H | |
23 | ||
95db3a60 | 24 | #include <media/media-device.h> |
2a1fcdf0 | 25 | #include <media/v4l2-subdev.h> |
0f62fd6a | 26 | #include <media/v4l2-dev.h> |
2a1fcdf0 | 27 | |
1351a58c | 28 | #define V4L2_DEVICE_NAME_SIZE (20 + 16) |
2a1fcdf0 | 29 | |
0996517c HV |
30 | struct v4l2_ctrl_handler; |
31 | ||
575f9308 MCC |
32 | /** |
33 | * struct v4l2_device - main struct to for V4L2 device drivers | |
34 | * | |
35 | * @dev: pointer to struct device. | |
36 | * @mdev: pointer to struct media_device | |
37 | * @subdevs: used to keep track of the registered subdevs | |
38 | * @lock: lock this struct; can be used by the driver as well | |
39 | * if this struct is embedded into a larger struct. | |
40 | * @name: unique device name, by default the driver name + bus ID | |
d651ff91 | 41 | * @notify: notify operation called by some sub-devices. |
65d7aba0 | 42 | * @ctrl_handler: The control handler. May be %NULL. |
575f9308 MCC |
43 | * @prio: Device's priority state |
44 | * @ref: Keep track of the references to this struct. | |
45 | * @release: Release function that is called when the ref count | |
46 | * goes to 0. | |
47 | * | |
48 | * Each instance of a V4L2 device should create the v4l2_device struct, | |
49 | * either stand-alone or embedded in a larger struct. | |
50 | * | |
51 | * It allows easy access to sub-devices (see v4l2-subdev.h) and provides | |
52 | * basic V4L2 device-level support. | |
53 | * | |
54 | * .. note:: | |
55 | * | |
65d7aba0 MCC |
56 | * #) @dev->driver_data points to this struct. |
57 | * #) @dev might be %NULL if there is no parent device | |
575f9308 | 58 | */ |
2a1fcdf0 | 59 | struct v4l2_device { |
2a1fcdf0 | 60 | struct device *dev; |
95db3a60 LP |
61 | #if defined(CONFIG_MEDIA_CONTROLLER) |
62 | struct media_device *mdev; | |
63 | #endif | |
2a1fcdf0 | 64 | struct list_head subdevs; |
2a1fcdf0 | 65 | spinlock_t lock; |
2a1fcdf0 | 66 | char name[V4L2_DEVICE_NAME_SIZE]; |
98ec6339 HV |
67 | void (*notify)(struct v4l2_subdev *sd, |
68 | unsigned int notification, void *arg); | |
0996517c | 69 | struct v4l2_ctrl_handler *ctrl_handler; |
0f62fd6a | 70 | struct v4l2_prio_state prio; |
bedf8bcf | 71 | struct kref ref; |
bedf8bcf | 72 | void (*release)(struct v4l2_device *v4l2_dev); |
2a1fcdf0 HV |
73 | }; |
74 | ||
575f9308 MCC |
75 | /** |
76 | * v4l2_device_get - gets a V4L2 device reference | |
77 | * | |
65d7aba0 | 78 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
79 | * |
80 | * This is an ancillary routine meant to increment the usage for the | |
65d7aba0 | 81 | * struct &v4l2_device pointed by @v4l2_dev. |
575f9308 | 82 | */ |
bedf8bcf HV |
83 | static inline void v4l2_device_get(struct v4l2_device *v4l2_dev) |
84 | { | |
85 | kref_get(&v4l2_dev->ref); | |
86 | } | |
87 | ||
575f9308 MCC |
88 | /** |
89 | * v4l2_device_put - putss a V4L2 device reference | |
90 | * | |
65d7aba0 | 91 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
92 | * |
93 | * This is an ancillary routine meant to decrement the usage for the | |
65d7aba0 | 94 | * struct &v4l2_device pointed by @v4l2_dev. |
575f9308 | 95 | */ |
bedf8bcf HV |
96 | int v4l2_device_put(struct v4l2_device *v4l2_dev); |
97 | ||
575f9308 | 98 | /** |
65d7aba0 MCC |
99 | * v4l2_device_register - Initialize v4l2_dev and make @dev->driver_data |
100 | * point to @v4l2_dev. | |
575f9308 | 101 | * |
65d7aba0 MCC |
102 | * @dev: pointer to struct &device |
103 | * @v4l2_dev: pointer to struct &v4l2_device | |
575f9308 MCC |
104 | * |
105 | * .. note:: | |
65d7aba0 MCC |
106 | * @dev may be %NULL in rare cases (ISA devices). |
107 | * In such case the caller must fill in the @v4l2_dev->name field | |
575f9308 MCC |
108 | * before calling this function. |
109 | */ | |
110 | int __must_check v4l2_device_register(struct device *dev, | |
111 | struct v4l2_device *v4l2_dev); | |
112 | ||
113 | /** | |
114 | * v4l2_device_set_name - Optional function to initialize the | |
65d7aba0 | 115 | * name field of struct &v4l2_device |
575f9308 | 116 | * |
65d7aba0 | 117 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
118 | * @basename: base name for the device name |
119 | * @instance: pointer to a static atomic_t var with the instance usage for | |
65d7aba0 | 120 | * the device driver. |
575f9308 | 121 | * |
65d7aba0 | 122 | * v4l2_device_set_name() initializes the name field of struct &v4l2_device |
575f9308 MCC |
123 | * using the driver name and a driver-global atomic_t instance. |
124 | * | |
125 | * This function will increment the instance counter and returns the | |
126 | * instance value used in the name. | |
127 | * | |
128 | * Example: | |
129 | * | |
130 | * static atomic_t drv_instance = ATOMIC_INIT(0); | |
131 | * | |
132 | * ... | |
133 | * | |
65d7aba0 | 134 | * instance = v4l2_device_set_name(&\ v4l2_dev, "foo", &\ drv_instance); |
575f9308 MCC |
135 | * |
136 | * The first time this is called the name field will be set to foo0 and | |
137 | * this function returns 0. If the name ends with a digit (e.g. cx18), | |
138 | * then the name will be set to cx18-0 since cx180 would look really odd. | |
139 | */ | |
102e7813 | 140 | int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename, |
575f9308 MCC |
141 | atomic_t *instance); |
142 | ||
143 | /** | |
144 | * v4l2_device_disconnect - Change V4L2 device state to disconnected. | |
145 | * | |
146 | * @v4l2_dev: pointer to struct v4l2_device | |
147 | * | |
148 | * Should be called when the USB parent disconnects. | |
65d7aba0 | 149 | * Since the parent disappears, this ensures that @v4l2_dev doesn't have |
575f9308 MCC |
150 | * an invalid parent pointer. |
151 | * | |
65d7aba0 | 152 | * .. note:: This function sets @v4l2_dev->dev to NULL. |
575f9308 | 153 | */ |
ae6cfaac | 154 | void v4l2_device_disconnect(struct v4l2_device *v4l2_dev); |
102e7813 | 155 | |
575f9308 MCC |
156 | /** |
157 | * v4l2_device_unregister - Unregister all sub-devices and any other | |
65d7aba0 | 158 | * resources related to @v4l2_dev. |
575f9308 MCC |
159 | * |
160 | * @v4l2_dev: pointer to struct v4l2_device | |
161 | */ | |
2a1fcdf0 HV |
162 | void v4l2_device_unregister(struct v4l2_device *v4l2_dev); |
163 | ||
575f9308 MCC |
164 | /** |
165 | * v4l2_device_register_subdev - Registers a subdev with a v4l2 device. | |
166 | * | |
65d7aba0 | 167 | * @v4l2_dev: pointer to struct &v4l2_device |
d651ff91 | 168 | * @sd: pointer to &struct v4l2_subdev |
575f9308 MCC |
169 | * |
170 | * While registered, the subdev module is marked as in-use. | |
171 | * | |
172 | * An error is returned if the module is no longer loaded on any attempts | |
173 | * to register it. | |
174 | */ | |
3a63e449 | 175 | int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev, |
575f9308 MCC |
176 | struct v4l2_subdev *sd); |
177 | ||
178 | /** | |
179 | * v4l2_device_unregister_subdev - Unregisters a subdev with a v4l2 device. | |
180 | * | |
d651ff91 | 181 | * @sd: pointer to &struct v4l2_subdev |
575f9308 MCC |
182 | * |
183 | * .. note :: | |
184 | * | |
185 | * Can also be called if the subdev wasn't registered. In such | |
186 | * case, it will do nothing. | |
187 | */ | |
2a1fcdf0 HV |
188 | void v4l2_device_unregister_subdev(struct v4l2_subdev *sd); |
189 | ||
575f9308 MCC |
190 | /** |
191 | * v4l2_device_register_subdev_nodes - Registers device nodes for all subdevs | |
192 | * of the v4l2 device that are marked with | |
65d7aba0 | 193 | * the %V4L2_SUBDEV_FL_HAS_DEVNODE flag. |
575f9308 MCC |
194 | * |
195 | * @v4l2_dev: pointer to struct v4l2_device | |
2096a5dc LP |
196 | */ |
197 | int __must_check | |
198 | v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev); | |
199 | ||
575f9308 MCC |
200 | /** |
201 | * v4l2_subdev_notify - Sends a notification to v4l2_device. | |
202 | * | |
d651ff91 | 203 | * @sd: pointer to &struct v4l2_subdev |
575f9308 | 204 | * @notification: type of notification. Please notice that the notification |
65d7aba0 | 205 | * type is driver-specific. |
575f9308 MCC |
206 | * @arg: arguments for the notification. Those are specific to each |
207 | * notification type. | |
208 | */ | |
ba76a6e6 HV |
209 | static inline void v4l2_subdev_notify(struct v4l2_subdev *sd, |
210 | unsigned int notification, void *arg) | |
211 | { | |
212 | if (sd && sd->v4l2_dev && sd->v4l2_dev->notify) | |
213 | sd->v4l2_dev->notify(sd, notification, arg); | |
214 | } | |
215 | ||
d651ff91 MCC |
216 | /* Helper macros to iterate over all subdevs. */ |
217 | ||
218 | /** | |
219 | * v4l2_device_for_each_subdev - Helper macro that interates over all | |
220 | * sub-devices of a given &v4l2_device. | |
221 | * | |
222 | * @sd: pointer that will be filled by the macro with all | |
223 | * &struct v4l2_subdev pointer used as an iterator by the loop. | |
224 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
225 | * | |
226 | * This macro iterates over all sub-devices owned by the @v4l2_dev device. | |
227 | * It acts as a for loop iterator and executes the next statement with | |
228 | * the @sd variable pointing to each sub-device in turn. | |
229 | */ | |
3a63e449 HV |
230 | #define v4l2_device_for_each_subdev(sd, v4l2_dev) \ |
231 | list_for_each_entry(sd, &(v4l2_dev)->subdevs, list) | |
2a1fcdf0 | 232 | |
d651ff91 MCC |
233 | /** |
234 | * __v4l2_device_call_subdevs_p - Calls the specified operation for | |
235 | * all subdevs matching the condition. | |
236 | * | |
237 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
238 | * @sd: pointer that will be filled by the macro with all | |
239 | * &struct v4l2_subdev pointer used as an iterator by the loop. | |
240 | * @cond: condition to be match | |
241 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
242 | * Each element there groups a set of operations functions. | |
243 | * @f: operation function that will be called if @cond matches. | |
244 | * The operation functions are defined in groups, according to | |
245 | * each element at &struct v4l2_subdev_ops. | |
246 | * @args...: arguments for @f. | |
247 | * | |
248 | * Ignore any errors. | |
249 | * | |
250 | * Note: subdevs cannot be added or deleted while walking | |
251 | * the subdevs list. | |
252 | */ | |
6c2d4dd1 | 253 | #define __v4l2_device_call_subdevs_p(v4l2_dev, sd, cond, o, f, args...) \ |
65d7aba0 | 254 | do { \ |
6c2d4dd1 GL |
255 | list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) \ |
256 | if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \ | |
257 | (sd)->ops->o->f((sd) , ##args); \ | |
258 | } while (0) | |
259 | ||
d651ff91 MCC |
260 | /** |
261 | * __v4l2_device_call_subdevs - Calls the specified operation for | |
262 | * all subdevs matching the condition. | |
263 | * | |
264 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
265 | * @cond: condition to be match | |
266 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
267 | * Each element there groups a set of operations functions. | |
268 | * @f: operation function that will be called if @cond matches. | |
269 | * The operation functions are defined in groups, according to | |
270 | * each element at &struct v4l2_subdev_ops. | |
271 | * @args...: arguments for @f. | |
272 | * | |
273 | * Ignore any errors. | |
274 | * | |
275 | * Note: subdevs cannot be added or deleted while walking | |
276 | * the subdevs list. | |
277 | */ | |
6c2d4dd1 GL |
278 | #define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \ |
279 | do { \ | |
280 | struct v4l2_subdev *__sd; \ | |
2a1fcdf0 | 281 | \ |
6c2d4dd1 GL |
282 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, cond, o, \ |
283 | f , ##args); \ | |
2a1fcdf0 HV |
284 | } while (0) |
285 | ||
d651ff91 MCC |
286 | /** |
287 | * __v4l2_device_call_subdevs_until_err_p - Calls the specified operation for | |
288 | * all subdevs matching the condition. | |
289 | * | |
290 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
291 | * @sd: pointer that will be filled by the macro with all | |
292 | * &struct v4l2_subdev sub-devices associated with @v4l2_dev. | |
293 | * @cond: condition to be match | |
294 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
295 | * Each element there groups a set of operations functions. | |
296 | * @f: operation function that will be called if @cond matches. | |
297 | * The operation functions are defined in groups, according to | |
298 | * each element at &struct v4l2_subdev_ops. | |
299 | * @args...: arguments for @f. | |
300 | * | |
301 | * Return: | |
302 | * | |
303 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
304 | * for any subdevice, then abort and return with that error code, zero | |
305 | * otherwise. | |
306 | * | |
307 | * Note: subdevs cannot be added or deleted while walking | |
308 | * the subdevs list. | |
309 | */ | |
6c2d4dd1 | 310 | #define __v4l2_device_call_subdevs_until_err_p(v4l2_dev, sd, cond, o, f, args...) \ |
65d7aba0 | 311 | ({ \ |
6c2d4dd1 | 312 | long __err = 0; \ |
2a1fcdf0 | 313 | \ |
6c2d4dd1 GL |
314 | list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) { \ |
315 | if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \ | |
316 | __err = (sd)->ops->o->f((sd) , ##args); \ | |
317 | if (__err && __err != -ENOIOCTLCMD) \ | |
65d7aba0 MCC |
318 | break; \ |
319 | } \ | |
6c2d4dd1 GL |
320 | (__err == -ENOIOCTLCMD) ? 0 : __err; \ |
321 | }) | |
322 | ||
d651ff91 MCC |
323 | /** |
324 | * __v4l2_device_call_subdevs_until_err - Calls the specified operation for | |
325 | * all subdevs matching the condition. | |
326 | * | |
327 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
328 | * @cond: condition to be match | |
329 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
330 | * Each element there groups a set of operations functions. | |
331 | * @f: operation function that will be called if @cond matches. | |
332 | * The operation functions are defined in groups, according to | |
333 | * each element at &struct v4l2_subdev_ops. | |
334 | * @args...: arguments for @f. | |
335 | * | |
336 | * Return: | |
337 | * | |
338 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
339 | * for any subdevice, then abort and return with that error code, | |
340 | * zero otherwise. | |
341 | * | |
342 | * Note: subdevs cannot be added or deleted while walking | |
343 | * the subdevs list. | |
344 | */ | |
6c2d4dd1 GL |
345 | #define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \ |
346 | ({ \ | |
347 | struct v4l2_subdev *__sd; \ | |
348 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, cond, o, \ | |
c6c73544 | 349 | f , ##args); \ |
2a1fcdf0 HV |
350 | }) |
351 | ||
d651ff91 MCC |
352 | /** |
353 | * v4l2_device_call_all - Calls the specified operation for | |
354 | * all subdevs matching the &v4l2_subdev.grp_id, as assigned | |
355 | * by the bridge driver. | |
356 | * | |
357 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
358 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
359 | * Use 0 to match them all. | |
360 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
361 | * Each element there groups a set of operations functions. | |
362 | * @f: operation function that will be called if @cond matches. | |
363 | * The operation functions are defined in groups, according to | |
364 | * each element at &struct v4l2_subdev_ops. | |
365 | * @args...: arguments for @f. | |
366 | * | |
367 | * Ignore any errors. | |
368 | * | |
369 | * Note: subdevs cannot be added or deleted while walking | |
370 | * the subdevs list. | |
371 | */ | |
6c2d4dd1 GL |
372 | #define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \ |
373 | do { \ | |
374 | struct v4l2_subdev *__sd; \ | |
375 | \ | |
376 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \ | |
377 | !(grpid) || __sd->grp_id == (grpid), o, f , \ | |
378 | ##args); \ | |
379 | } while (0) | |
2a1fcdf0 | 380 | |
d651ff91 MCC |
381 | /** |
382 | * v4l2_device_call_until_err - Calls the specified operation for | |
383 | * all subdevs matching the &v4l2_subdev.grp_id, as assigned | |
384 | * by the bridge driver, until an error occurs. | |
385 | * | |
386 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
387 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
388 | * Use 0 to match them all. | |
389 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
390 | * Each element there groups a set of operations functions. | |
391 | * @f: operation function that will be called if @cond matches. | |
392 | * The operation functions are defined in groups, according to | |
393 | * each element at &struct v4l2_subdev_ops. | |
394 | * @args...: arguments for @f. | |
395 | * | |
396 | * Return: | |
397 | * | |
398 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
399 | * for any subdevice, then abort and return with that error code, | |
400 | * zero otherwise. | |
401 | * | |
402 | * Note: subdevs cannot be added or deleted while walking | |
403 | * the subdevs list. | |
404 | */ | |
65d7aba0 | 405 | #define v4l2_device_call_until_err(v4l2_dev, grpid, o, f, args...) \ |
6c2d4dd1 GL |
406 | ({ \ |
407 | struct v4l2_subdev *__sd; \ | |
408 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \ | |
409 | !(grpid) || __sd->grp_id == (grpid), o, f , \ | |
410 | ##args); \ | |
411 | }) | |
2a1fcdf0 | 412 | |
d651ff91 MCC |
413 | /** |
414 | * v4l2_device_mask_call_all - Calls the specified operation for | |
415 | * all subdevices where a group ID matches a specified bitmask. | |
416 | * | |
417 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
418 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
419 | * group ID to be matched. Use 0 to match them all. | |
420 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
421 | * Each element there groups a set of operations functions. | |
422 | * @f: operation function that will be called if @cond matches. | |
423 | * The operation functions are defined in groups, according to | |
424 | * each element at &struct v4l2_subdev_ops. | |
425 | * @args...: arguments for @f. | |
426 | * | |
427 | * Ignore any errors. | |
428 | * | |
429 | * Note: subdevs cannot be added or deleted while walking | |
430 | * the subdevs list. | |
96655553 HV |
431 | */ |
432 | #define v4l2_device_mask_call_all(v4l2_dev, grpmsk, o, f, args...) \ | |
433 | do { \ | |
434 | struct v4l2_subdev *__sd; \ | |
435 | \ | |
436 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \ | |
437 | !(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \ | |
438 | ##args); \ | |
439 | } while (0) | |
440 | ||
d651ff91 MCC |
441 | /** |
442 | * v4l2_device_mask_call_until_err - Calls the specified operation for | |
443 | * all subdevices where a group ID matches a specified bitmask. | |
444 | * | |
445 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
446 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
447 | * group ID to be matched. Use 0 to match them all. | |
448 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
449 | * Each element there groups a set of operations functions. | |
450 | * @f: operation function that will be called if @cond matches. | |
451 | * The operation functions are defined in groups, according to | |
452 | * each element at &struct v4l2_subdev_ops. | |
453 | * @args...: arguments for @f. | |
454 | * | |
455 | * Return: | |
456 | * | |
457 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
458 | * for any subdevice, then abort and return with that error code, | |
459 | * zero otherwise. | |
460 | * | |
461 | * Note: subdevs cannot be added or deleted while walking | |
462 | * the subdevs list. | |
96655553 HV |
463 | */ |
464 | #define v4l2_device_mask_call_until_err(v4l2_dev, grpmsk, o, f, args...) \ | |
465 | ({ \ | |
466 | struct v4l2_subdev *__sd; \ | |
467 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \ | |
468 | !(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \ | |
469 | ##args); \ | |
470 | }) | |
471 | ||
d651ff91 MCC |
472 | |
473 | /** | |
474 | * v4l2_device_has_op - checks if any subdev with matching grpid has a | |
475 | * given ops. | |
476 | * | |
477 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
478 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
479 | * Use 0 to match them all. | |
480 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
481 | * Each element there groups a set of operations functions. | |
482 | * @f: operation function that will be called if @cond matches. | |
483 | * The operation functions are defined in groups, according to | |
484 | * each element at &struct v4l2_subdev_ops. | |
96655553 HV |
485 | */ |
486 | #define v4l2_device_has_op(v4l2_dev, grpid, o, f) \ | |
487 | ({ \ | |
488 | struct v4l2_subdev *__sd; \ | |
489 | bool __result = false; \ | |
490 | list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \ | |
491 | if ((grpid) && __sd->grp_id != (grpid)) \ | |
492 | continue; \ | |
493 | if (v4l2_subdev_has_op(__sd, o, f)) { \ | |
494 | __result = true; \ | |
495 | break; \ | |
496 | } \ | |
497 | } \ | |
498 | __result; \ | |
499 | }) | |
500 | ||
d651ff91 MCC |
501 | /** |
502 | * v4l2_device_mask_has_op - checks if any subdev with matching group | |
503 | * mask has a given ops. | |
504 | * | |
505 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
506 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
507 | * group ID to be matched. Use 0 to match them all. | |
508 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
509 | * Each element there groups a set of operations functions. | |
510 | * @f: operation function that will be called if @cond matches. | |
511 | * The operation functions are defined in groups, according to | |
512 | * each element at &struct v4l2_subdev_ops. | |
96655553 HV |
513 | */ |
514 | #define v4l2_device_mask_has_op(v4l2_dev, grpmsk, o, f) \ | |
2180f92d HV |
515 | ({ \ |
516 | struct v4l2_subdev *__sd; \ | |
517 | bool __result = false; \ | |
518 | list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \ | |
96655553 HV |
519 | if ((grpmsk) && !(__sd->grp_id & (grpmsk))) \ |
520 | continue; \ | |
2180f92d HV |
521 | if (v4l2_subdev_has_op(__sd, o, f)) { \ |
522 | __result = true; \ | |
523 | break; \ | |
524 | } \ | |
525 | } \ | |
526 | __result; \ | |
527 | }) | |
528 | ||
2a1fcdf0 | 529 | #endif |