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1 : : /* SPDX-License-Identifier: GPL-2.0-or-later */
2 : : /*
3 : : V4L2 device support header.
4 : :
5 : : Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
6 : :
7 : : */
8 : :
9 : : #ifndef _V4L2_DEVICE_H
10 : : #define _V4L2_DEVICE_H
11 : :
12 : : #include <media/media-device.h>
13 : : #include <media/v4l2-subdev.h>
14 : : #include <media/v4l2-dev.h>
15 : :
16 : : #define V4L2_DEVICE_NAME_SIZE (20 + 16)
17 : :
18 : : struct v4l2_ctrl_handler;
19 : :
20 : : /**
21 : : * struct v4l2_device - main struct to for V4L2 device drivers
22 : : *
23 : : * @dev: pointer to struct device.
24 : : * @mdev: pointer to struct media_device, may be NULL.
25 : : * @subdevs: used to keep track of the registered subdevs
26 : : * @lock: lock this struct; can be used by the driver as well
27 : : * if this struct is embedded into a larger struct.
28 : : * @name: unique device name, by default the driver name + bus ID
29 : : * @notify: notify operation called by some sub-devices.
30 : : * @ctrl_handler: The control handler. May be %NULL.
31 : : * @prio: Device's priority state
32 : : * @ref: Keep track of the references to this struct.
33 : : * @release: Release function that is called when the ref count
34 : : * goes to 0.
35 : : *
36 : : * Each instance of a V4L2 device should create the v4l2_device struct,
37 : : * either stand-alone or embedded in a larger struct.
38 : : *
39 : : * It allows easy access to sub-devices (see v4l2-subdev.h) and provides
40 : : * basic V4L2 device-level support.
41 : : *
42 : : * .. note::
43 : : *
44 : : * #) @dev->driver_data points to this struct.
45 : : * #) @dev might be %NULL if there is no parent device
46 : : */
47 : : struct v4l2_device {
48 : : struct device *dev;
49 : : struct media_device *mdev;
50 : : struct list_head subdevs;
51 : : spinlock_t lock;
52 : : char name[V4L2_DEVICE_NAME_SIZE];
53 : : void (*notify)(struct v4l2_subdev *sd,
54 : : unsigned int notification, void *arg);
55 : : struct v4l2_ctrl_handler *ctrl_handler;
56 : : struct v4l2_prio_state prio;
57 : : struct kref ref;
58 : : void (*release)(struct v4l2_device *v4l2_dev);
59 : : };
60 : :
61 : : /**
62 : : * v4l2_device_get - gets a V4L2 device reference
63 : : *
64 : : * @v4l2_dev: pointer to struct &v4l2_device
65 : : *
66 : : * This is an ancillary routine meant to increment the usage for the
67 : : * struct &v4l2_device pointed by @v4l2_dev.
68 : : */
69 : : static inline void v4l2_device_get(struct v4l2_device *v4l2_dev)
70 : : {
71 : : kref_get(&v4l2_dev->ref);
72 : : }
73 : :
74 : : /**
75 : : * v4l2_device_put - putss a V4L2 device reference
76 : : *
77 : : * @v4l2_dev: pointer to struct &v4l2_device
78 : : *
79 : : * This is an ancillary routine meant to decrement the usage for the
80 : : * struct &v4l2_device pointed by @v4l2_dev.
81 : : */
82 : : int v4l2_device_put(struct v4l2_device *v4l2_dev);
83 : :
84 : : /**
85 : : * v4l2_device_register - Initialize v4l2_dev and make @dev->driver_data
86 : : * point to @v4l2_dev.
87 : : *
88 : : * @dev: pointer to struct &device
89 : : * @v4l2_dev: pointer to struct &v4l2_device
90 : : *
91 : : * .. note::
92 : : * @dev may be %NULL in rare cases (ISA devices).
93 : : * In such case the caller must fill in the @v4l2_dev->name field
94 : : * before calling this function.
95 : : */
96 : : int __must_check v4l2_device_register(struct device *dev,
97 : : struct v4l2_device *v4l2_dev);
98 : :
99 : : /**
100 : : * v4l2_device_set_name - Optional function to initialize the
101 : : * name field of struct &v4l2_device
102 : : *
103 : : * @v4l2_dev: pointer to struct &v4l2_device
104 : : * @basename: base name for the device name
105 : : * @instance: pointer to a static atomic_t var with the instance usage for
106 : : * the device driver.
107 : : *
108 : : * v4l2_device_set_name() initializes the name field of struct &v4l2_device
109 : : * using the driver name and a driver-global atomic_t instance.
110 : : *
111 : : * This function will increment the instance counter and returns the
112 : : * instance value used in the name.
113 : : *
114 : : * Example:
115 : : *
116 : : * static atomic_t drv_instance = ATOMIC_INIT(0);
117 : : *
118 : : * ...
119 : : *
120 : : * instance = v4l2_device_set_name(&\ v4l2_dev, "foo", &\ drv_instance);
121 : : *
122 : : * The first time this is called the name field will be set to foo0 and
123 : : * this function returns 0. If the name ends with a digit (e.g. cx18),
124 : : * then the name will be set to cx18-0 since cx180 would look really odd.
125 : : */
126 : : int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
127 : : atomic_t *instance);
128 : :
129 : : /**
130 : : * v4l2_device_disconnect - Change V4L2 device state to disconnected.
131 : : *
132 : : * @v4l2_dev: pointer to struct v4l2_device
133 : : *
134 : : * Should be called when the USB parent disconnects.
135 : : * Since the parent disappears, this ensures that @v4l2_dev doesn't have
136 : : * an invalid parent pointer.
137 : : *
138 : : * .. note:: This function sets @v4l2_dev->dev to NULL.
139 : : */
140 : : void v4l2_device_disconnect(struct v4l2_device *v4l2_dev);
141 : :
142 : : /**
143 : : * v4l2_device_unregister - Unregister all sub-devices and any other
144 : : * resources related to @v4l2_dev.
145 : : *
146 : : * @v4l2_dev: pointer to struct v4l2_device
147 : : */
148 : : void v4l2_device_unregister(struct v4l2_device *v4l2_dev);
149 : :
150 : : /**
151 : : * v4l2_device_register_subdev - Registers a subdev with a v4l2 device.
152 : : *
153 : : * @v4l2_dev: pointer to struct &v4l2_device
154 : : * @sd: pointer to &struct v4l2_subdev
155 : : *
156 : : * While registered, the subdev module is marked as in-use.
157 : : *
158 : : * An error is returned if the module is no longer loaded on any attempts
159 : : * to register it.
160 : : */
161 : : int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
162 : : struct v4l2_subdev *sd);
163 : :
164 : : /**
165 : : * v4l2_device_unregister_subdev - Unregisters a subdev with a v4l2 device.
166 : : *
167 : : * @sd: pointer to &struct v4l2_subdev
168 : : *
169 : : * .. note ::
170 : : *
171 : : * Can also be called if the subdev wasn't registered. In such
172 : : * case, it will do nothing.
173 : : */
174 : : void v4l2_device_unregister_subdev(struct v4l2_subdev *sd);
175 : :
176 : : /**
177 : : * __v4l2_device_register_ro_subdev_nodes - Registers device nodes for
178 : : * all subdevs of the v4l2 device that are marked with the
179 : : * %V4L2_SUBDEV_FL_HAS_DEVNODE flag.
180 : : *
181 : : * @v4l2_dev: pointer to struct v4l2_device
182 : : * @read_only: subdevices read-only flag. True to register the subdevices
183 : : * device nodes in read-only mode, false to allow full access to the
184 : : * subdevice userspace API.
185 : : */
186 : : int __must_check
187 : : __v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev,
188 : : bool read_only);
189 : :
190 : : /**
191 : : * v4l2_device_register_subdev_nodes - Registers subdevices device nodes with
192 : : * unrestricted access to the subdevice userspace operations
193 : : *
194 : : * Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
195 : : * for more details.
196 : : *
197 : : * @v4l2_dev: pointer to struct v4l2_device
198 : : */
199 : : static inline int __must_check
200 : : v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
201 : : {
202 : : #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
203 : : return __v4l2_device_register_subdev_nodes(v4l2_dev, false);
204 : : #else
205 : : return 0;
206 : : #endif
207 : : }
208 : :
209 : : /**
210 : : * v4l2_device_register_ro_subdev_nodes - Registers subdevices device nodes
211 : : * in read-only mode
212 : : *
213 : : * Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
214 : : * for more details.
215 : : *
216 : : * @v4l2_dev: pointer to struct v4l2_device
217 : : */
218 : : static inline int __must_check
219 : : v4l2_device_register_ro_subdev_nodes(struct v4l2_device *v4l2_dev)
220 : : {
221 : : #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
222 : : return __v4l2_device_register_subdev_nodes(v4l2_dev, true);
223 : : #else
224 : : return 0;
225 : : #endif
226 : : }
227 : :
228 : : /**
229 : : * v4l2_subdev_notify - Sends a notification to v4l2_device.
230 : : *
231 : : * @sd: pointer to &struct v4l2_subdev
232 : : * @notification: type of notification. Please notice that the notification
233 : : * type is driver-specific.
234 : : * @arg: arguments for the notification. Those are specific to each
235 : : * notification type.
236 : : */
237 : : static inline void v4l2_subdev_notify(struct v4l2_subdev *sd,
238 : : unsigned int notification, void *arg)
239 : : {
240 [ # # # # : 0 : if (sd && sd->v4l2_dev && sd->v4l2_dev->notify)
# # ]
241 : 0 : sd->v4l2_dev->notify(sd, notification, arg);
242 : : }
243 : :
244 : : /**
245 : : * v4l2_device_supports_requests - Test if requests are supported.
246 : : *
247 : : * @v4l2_dev: pointer to struct v4l2_device
248 : : */
249 : : static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
250 : : {
251 [ + + - + : 2895 : return v4l2_dev->mdev && v4l2_dev->mdev->ops &&
# # ]
252 : 0 : v4l2_dev->mdev->ops->req_queue;
253 : : }
254 : :
255 : : /* Helper macros to iterate over all subdevs. */
256 : :
257 : : /**
258 : : * v4l2_device_for_each_subdev - Helper macro that interates over all
259 : : * sub-devices of a given &v4l2_device.
260 : : *
261 : : * @sd: pointer that will be filled by the macro with all
262 : : * &struct v4l2_subdev pointer used as an iterator by the loop.
263 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
264 : : *
265 : : * This macro iterates over all sub-devices owned by the @v4l2_dev device.
266 : : * It acts as a for loop iterator and executes the next statement with
267 : : * the @sd variable pointing to each sub-device in turn.
268 : : */
269 : : #define v4l2_device_for_each_subdev(sd, v4l2_dev) \
270 : : list_for_each_entry(sd, &(v4l2_dev)->subdevs, list)
271 : :
272 : : /**
273 : : * __v4l2_device_call_subdevs_p - Calls the specified operation for
274 : : * all subdevs matching the condition.
275 : : *
276 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
277 : : * @sd: pointer that will be filled by the macro with all
278 : : * &struct v4l2_subdev pointer used as an iterator by the loop.
279 : : * @cond: condition to be match
280 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
281 : : * Each element there groups a set of operations functions.
282 : : * @f: operation function that will be called if @cond matches.
283 : : * The operation functions are defined in groups, according to
284 : : * each element at &struct v4l2_subdev_ops.
285 : : * @args...: arguments for @f.
286 : : *
287 : : * Ignore any errors.
288 : : *
289 : : * Note: subdevs cannot be added or deleted while walking
290 : : * the subdevs list.
291 : : */
292 : : #define __v4l2_device_call_subdevs_p(v4l2_dev, sd, cond, o, f, args...) \
293 : : do { \
294 : : list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) \
295 : : if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
296 : : (sd)->ops->o->f((sd) , ##args); \
297 : : } while (0)
298 : :
299 : : /**
300 : : * __v4l2_device_call_subdevs - Calls the specified operation for
301 : : * all subdevs matching the condition.
302 : : *
303 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
304 : : * @cond: condition to be match
305 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
306 : : * Each element there groups a set of operations functions.
307 : : * @f: operation function that will be called if @cond matches.
308 : : * The operation functions are defined in groups, according to
309 : : * each element at &struct v4l2_subdev_ops.
310 : : * @args...: arguments for @f.
311 : : *
312 : : * Ignore any errors.
313 : : *
314 : : * Note: subdevs cannot be added or deleted while walking
315 : : * the subdevs list.
316 : : */
317 : : #define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \
318 : : do { \
319 : : struct v4l2_subdev *__sd; \
320 : : \
321 : : __v4l2_device_call_subdevs_p(v4l2_dev, __sd, cond, o, \
322 : : f , ##args); \
323 : : } while (0)
324 : :
325 : : /**
326 : : * __v4l2_device_call_subdevs_until_err_p - Calls the specified operation for
327 : : * all subdevs matching the condition.
328 : : *
329 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
330 : : * @sd: pointer that will be filled by the macro with all
331 : : * &struct v4l2_subdev sub-devices associated with @v4l2_dev.
332 : : * @cond: condition to be match
333 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
334 : : * Each element there groups a set of operations functions.
335 : : * @f: operation function that will be called if @cond matches.
336 : : * The operation functions are defined in groups, according to
337 : : * each element at &struct v4l2_subdev_ops.
338 : : * @args...: arguments for @f.
339 : : *
340 : : * Return:
341 : : *
342 : : * If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
343 : : * for any subdevice, then abort and return with that error code, zero
344 : : * otherwise.
345 : : *
346 : : * Note: subdevs cannot be added or deleted while walking
347 : : * the subdevs list.
348 : : */
349 : : #define __v4l2_device_call_subdevs_until_err_p(v4l2_dev, sd, cond, o, f, args...) \
350 : : ({ \
351 : : long __err = 0; \
352 : : \
353 : : list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) { \
354 : : if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
355 : : __err = (sd)->ops->o->f((sd) , ##args); \
356 : : if (__err && __err != -ENOIOCTLCMD) \
357 : : break; \
358 : : } \
359 : : (__err == -ENOIOCTLCMD) ? 0 : __err; \
360 : : })
361 : :
362 : : /**
363 : : * __v4l2_device_call_subdevs_until_err - Calls the specified operation for
364 : : * all subdevs matching the condition.
365 : : *
366 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
367 : : * @cond: condition to be match
368 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
369 : : * Each element there groups a set of operations functions.
370 : : * @f: operation function that will be called if @cond matches.
371 : : * The operation functions are defined in groups, according to
372 : : * each element at &struct v4l2_subdev_ops.
373 : : * @args...: arguments for @f.
374 : : *
375 : : * Return:
376 : : *
377 : : * If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
378 : : * for any subdevice, then abort and return with that error code,
379 : : * zero otherwise.
380 : : *
381 : : * Note: subdevs cannot be added or deleted while walking
382 : : * the subdevs list.
383 : : */
384 : : #define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \
385 : : ({ \
386 : : struct v4l2_subdev *__sd; \
387 : : __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, cond, o, \
388 : : f , ##args); \
389 : : })
390 : :
391 : : /**
392 : : * v4l2_device_call_all - Calls the specified operation for
393 : : * all subdevs matching the &v4l2_subdev.grp_id, as assigned
394 : : * by the bridge driver.
395 : : *
396 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
397 : : * @grpid: &struct v4l2_subdev->grp_id group ID to match.
398 : : * Use 0 to match them all.
399 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
400 : : * Each element there groups a set of operations functions.
401 : : * @f: operation function that will be called if @cond matches.
402 : : * The operation functions are defined in groups, according to
403 : : * each element at &struct v4l2_subdev_ops.
404 : : * @args...: arguments for @f.
405 : : *
406 : : * Ignore any errors.
407 : : *
408 : : * Note: subdevs cannot be added or deleted while walking
409 : : * the subdevs list.
410 : : */
411 : : #define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \
412 : : do { \
413 : : struct v4l2_subdev *__sd; \
414 : : \
415 : : __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
416 : : (grpid) == 0 || __sd->grp_id == (grpid), o, f , \
417 : : ##args); \
418 : : } while (0)
419 : :
420 : : /**
421 : : * v4l2_device_call_until_err - Calls the specified operation for
422 : : * all subdevs matching the &v4l2_subdev.grp_id, as assigned
423 : : * by the bridge driver, until an error occurs.
424 : : *
425 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
426 : : * @grpid: &struct v4l2_subdev->grp_id group ID to match.
427 : : * Use 0 to match them all.
428 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
429 : : * Each element there groups a set of operations functions.
430 : : * @f: operation function that will be called if @cond matches.
431 : : * The operation functions are defined in groups, according to
432 : : * each element at &struct v4l2_subdev_ops.
433 : : * @args...: arguments for @f.
434 : : *
435 : : * Return:
436 : : *
437 : : * If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
438 : : * for any subdevice, then abort and return with that error code,
439 : : * zero otherwise.
440 : : *
441 : : * Note: subdevs cannot be added or deleted while walking
442 : : * the subdevs list.
443 : : */
444 : : #define v4l2_device_call_until_err(v4l2_dev, grpid, o, f, args...) \
445 : : ({ \
446 : : struct v4l2_subdev *__sd; \
447 : : __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
448 : : (grpid) == 0 || __sd->grp_id == (grpid), o, f , \
449 : : ##args); \
450 : : })
451 : :
452 : : /**
453 : : * v4l2_device_mask_call_all - Calls the specified operation for
454 : : * all subdevices where a group ID matches a specified bitmask.
455 : : *
456 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
457 : : * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
458 : : * group ID to be matched. Use 0 to match them all.
459 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
460 : : * Each element there groups a set of operations functions.
461 : : * @f: operation function that will be called if @cond matches.
462 : : * The operation functions are defined in groups, according to
463 : : * each element at &struct v4l2_subdev_ops.
464 : : * @args...: arguments for @f.
465 : : *
466 : : * Ignore any errors.
467 : : *
468 : : * Note: subdevs cannot be added or deleted while walking
469 : : * the subdevs list.
470 : : */
471 : : #define v4l2_device_mask_call_all(v4l2_dev, grpmsk, o, f, args...) \
472 : : do { \
473 : : struct v4l2_subdev *__sd; \
474 : : \
475 : : __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
476 : : (grpmsk) == 0 || (__sd->grp_id & (grpmsk)), o, \
477 : : f , ##args); \
478 : : } while (0)
479 : :
480 : : /**
481 : : * v4l2_device_mask_call_until_err - Calls the specified operation for
482 : : * all subdevices where a group ID matches a specified bitmask.
483 : : *
484 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
485 : : * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
486 : : * group ID to be matched. Use 0 to match them all.
487 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
488 : : * Each element there groups a set of operations functions.
489 : : * @f: operation function that will be called if @cond matches.
490 : : * The operation functions are defined in groups, according to
491 : : * each element at &struct v4l2_subdev_ops.
492 : : * @args...: arguments for @f.
493 : : *
494 : : * Return:
495 : : *
496 : : * If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
497 : : * for any subdevice, then abort and return with that error code,
498 : : * zero otherwise.
499 : : *
500 : : * Note: subdevs cannot be added or deleted while walking
501 : : * the subdevs list.
502 : : */
503 : : #define v4l2_device_mask_call_until_err(v4l2_dev, grpmsk, o, f, args...) \
504 : : ({ \
505 : : struct v4l2_subdev *__sd; \
506 : : __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
507 : : (grpmsk) == 0 || (__sd->grp_id & (grpmsk)), o, \
508 : : f , ##args); \
509 : : })
510 : :
511 : :
512 : : /**
513 : : * v4l2_device_has_op - checks if any subdev with matching grpid has a
514 : : * given ops.
515 : : *
516 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
517 : : * @grpid: &struct v4l2_subdev->grp_id group ID to match.
518 : : * Use 0 to match them all.
519 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
520 : : * Each element there groups a set of operations functions.
521 : : * @f: operation function that will be called if @cond matches.
522 : : * The operation functions are defined in groups, according to
523 : : * each element at &struct v4l2_subdev_ops.
524 : : */
525 : : #define v4l2_device_has_op(v4l2_dev, grpid, o, f) \
526 : : ({ \
527 : : struct v4l2_subdev *__sd; \
528 : : bool __result = false; \
529 : : list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
530 : : if ((grpid) && __sd->grp_id != (grpid)) \
531 : : continue; \
532 : : if (v4l2_subdev_has_op(__sd, o, f)) { \
533 : : __result = true; \
534 : : break; \
535 : : } \
536 : : } \
537 : : __result; \
538 : : })
539 : :
540 : : /**
541 : : * v4l2_device_mask_has_op - checks if any subdev with matching group
542 : : * mask has a given ops.
543 : : *
544 : : * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
545 : : * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
546 : : * group ID to be matched. Use 0 to match them all.
547 : : * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
548 : : * Each element there groups a set of operations functions.
549 : : * @f: operation function that will be called if @cond matches.
550 : : * The operation functions are defined in groups, according to
551 : : * each element at &struct v4l2_subdev_ops.
552 : : */
553 : : #define v4l2_device_mask_has_op(v4l2_dev, grpmsk, o, f) \
554 : : ({ \
555 : : struct v4l2_subdev *__sd; \
556 : : bool __result = false; \
557 : : list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
558 : : if ((grpmsk) && !(__sd->grp_id & (grpmsk))) \
559 : : continue; \
560 : : if (v4l2_subdev_has_op(__sd, o, f)) { \
561 : : __result = true; \
562 : : break; \
563 : : } \
564 : : } \
565 : : __result; \
566 : : })
567 : :
568 : : #endif
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