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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2a1fcdf0 HV |
2 | /* |
3 | V4L2 device support header. | |
4 | ||
5 | Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> | |
6 | ||
2a1fcdf0 HV |
7 | */ |
8 | ||
9 | #ifndef _V4L2_DEVICE_H | |
10 | #define _V4L2_DEVICE_H | |
11 | ||
95db3a60 | 12 | #include <media/media-device.h> |
2a1fcdf0 | 13 | #include <media/v4l2-subdev.h> |
0f62fd6a | 14 | #include <media/v4l2-dev.h> |
2a1fcdf0 | 15 | |
1351a58c | 16 | #define V4L2_DEVICE_NAME_SIZE (20 + 16) |
2a1fcdf0 | 17 | |
0996517c HV |
18 | struct v4l2_ctrl_handler; |
19 | ||
575f9308 MCC |
20 | /** |
21 | * struct v4l2_device - main struct to for V4L2 device drivers | |
22 | * | |
23 | * @dev: pointer to struct device. | |
acd14c18 | 24 | * @mdev: pointer to struct media_device, may be NULL. |
575f9308 MCC |
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 | |
d651ff91 | 29 | * @notify: notify operation called by some sub-devices. |
65d7aba0 | 30 | * @ctrl_handler: The control handler. May be %NULL. |
575f9308 MCC |
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 | * | |
65d7aba0 MCC |
44 | * #) @dev->driver_data points to this struct. |
45 | * #) @dev might be %NULL if there is no parent device | |
575f9308 | 46 | */ |
2a1fcdf0 | 47 | struct v4l2_device { |
2a1fcdf0 | 48 | struct device *dev; |
95db3a60 | 49 | struct media_device *mdev; |
2a1fcdf0 | 50 | struct list_head subdevs; |
2a1fcdf0 | 51 | spinlock_t lock; |
2a1fcdf0 | 52 | char name[V4L2_DEVICE_NAME_SIZE]; |
98ec6339 HV |
53 | void (*notify)(struct v4l2_subdev *sd, |
54 | unsigned int notification, void *arg); | |
0996517c | 55 | struct v4l2_ctrl_handler *ctrl_handler; |
0f62fd6a | 56 | struct v4l2_prio_state prio; |
bedf8bcf | 57 | struct kref ref; |
bedf8bcf | 58 | void (*release)(struct v4l2_device *v4l2_dev); |
2a1fcdf0 HV |
59 | }; |
60 | ||
575f9308 MCC |
61 | /** |
62 | * v4l2_device_get - gets a V4L2 device reference | |
63 | * | |
65d7aba0 | 64 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
65 | * |
66 | * This is an ancillary routine meant to increment the usage for the | |
65d7aba0 | 67 | * struct &v4l2_device pointed by @v4l2_dev. |
575f9308 | 68 | */ |
bedf8bcf HV |
69 | static inline void v4l2_device_get(struct v4l2_device *v4l2_dev) |
70 | { | |
71 | kref_get(&v4l2_dev->ref); | |
72 | } | |
73 | ||
575f9308 MCC |
74 | /** |
75 | * v4l2_device_put - putss a V4L2 device reference | |
76 | * | |
65d7aba0 | 77 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
78 | * |
79 | * This is an ancillary routine meant to decrement the usage for the | |
65d7aba0 | 80 | * struct &v4l2_device pointed by @v4l2_dev. |
575f9308 | 81 | */ |
bedf8bcf HV |
82 | int v4l2_device_put(struct v4l2_device *v4l2_dev); |
83 | ||
575f9308 | 84 | /** |
65d7aba0 MCC |
85 | * v4l2_device_register - Initialize v4l2_dev and make @dev->driver_data |
86 | * point to @v4l2_dev. | |
575f9308 | 87 | * |
65d7aba0 MCC |
88 | * @dev: pointer to struct &device |
89 | * @v4l2_dev: pointer to struct &v4l2_device | |
575f9308 MCC |
90 | * |
91 | * .. note:: | |
65d7aba0 MCC |
92 | * @dev may be %NULL in rare cases (ISA devices). |
93 | * In such case the caller must fill in the @v4l2_dev->name field | |
575f9308 MCC |
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 | |
65d7aba0 | 101 | * name field of struct &v4l2_device |
575f9308 | 102 | * |
65d7aba0 | 103 | * @v4l2_dev: pointer to struct &v4l2_device |
575f9308 MCC |
104 | * @basename: base name for the device name |
105 | * @instance: pointer to a static atomic_t var with the instance usage for | |
65d7aba0 | 106 | * the device driver. |
575f9308 | 107 | * |
65d7aba0 | 108 | * v4l2_device_set_name() initializes the name field of struct &v4l2_device |
575f9308 MCC |
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 | * | |
65d7aba0 | 120 | * instance = v4l2_device_set_name(&\ v4l2_dev, "foo", &\ drv_instance); |
575f9308 MCC |
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 | */ | |
102e7813 | 126 | int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename, |
575f9308 MCC |
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. | |
65d7aba0 | 135 | * Since the parent disappears, this ensures that @v4l2_dev doesn't have |
575f9308 MCC |
136 | * an invalid parent pointer. |
137 | * | |
65d7aba0 | 138 | * .. note:: This function sets @v4l2_dev->dev to NULL. |
575f9308 | 139 | */ |
ae6cfaac | 140 | void v4l2_device_disconnect(struct v4l2_device *v4l2_dev); |
102e7813 | 141 | |
575f9308 MCC |
142 | /** |
143 | * v4l2_device_unregister - Unregister all sub-devices and any other | |
65d7aba0 | 144 | * resources related to @v4l2_dev. |
575f9308 MCC |
145 | * |
146 | * @v4l2_dev: pointer to struct v4l2_device | |
147 | */ | |
2a1fcdf0 HV |
148 | void v4l2_device_unregister(struct v4l2_device *v4l2_dev); |
149 | ||
575f9308 MCC |
150 | /** |
151 | * v4l2_device_register_subdev - Registers a subdev with a v4l2 device. | |
152 | * | |
65d7aba0 | 153 | * @v4l2_dev: pointer to struct &v4l2_device |
d651ff91 | 154 | * @sd: pointer to &struct v4l2_subdev |
575f9308 MCC |
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 | */ | |
3a63e449 | 161 | int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev, |
575f9308 MCC |
162 | struct v4l2_subdev *sd); |
163 | ||
164 | /** | |
165 | * v4l2_device_unregister_subdev - Unregisters a subdev with a v4l2 device. | |
166 | * | |
d651ff91 | 167 | * @sd: pointer to &struct v4l2_subdev |
575f9308 MCC |
168 | * |
169 | * .. note :: | |
170 | * | |
171 | * Can also be called if the subdev wasn't registered. In such | |
172 | * case, it will do nothing. | |
173 | */ | |
2a1fcdf0 HV |
174 | void v4l2_device_unregister_subdev(struct v4l2_subdev *sd); |
175 | ||
575f9308 MCC |
176 | /** |
177 | * v4l2_device_register_subdev_nodes - Registers device nodes for all subdevs | |
178 | * of the v4l2 device that are marked with | |
65d7aba0 | 179 | * the %V4L2_SUBDEV_FL_HAS_DEVNODE flag. |
575f9308 MCC |
180 | * |
181 | * @v4l2_dev: pointer to struct v4l2_device | |
2096a5dc LP |
182 | */ |
183 | int __must_check | |
184 | v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev); | |
185 | ||
575f9308 MCC |
186 | /** |
187 | * v4l2_subdev_notify - Sends a notification to v4l2_device. | |
188 | * | |
d651ff91 | 189 | * @sd: pointer to &struct v4l2_subdev |
575f9308 | 190 | * @notification: type of notification. Please notice that the notification |
65d7aba0 | 191 | * type is driver-specific. |
575f9308 MCC |
192 | * @arg: arguments for the notification. Those are specific to each |
193 | * notification type. | |
194 | */ | |
ba76a6e6 HV |
195 | static inline void v4l2_subdev_notify(struct v4l2_subdev *sd, |
196 | unsigned int notification, void *arg) | |
197 | { | |
198 | if (sd && sd->v4l2_dev && sd->v4l2_dev->notify) | |
199 | sd->v4l2_dev->notify(sd, notification, arg); | |
200 | } | |
201 | ||
93a9d900 HV |
202 | /** |
203 | * v4l2_device_supports_requests - Test if requests are supported. | |
204 | * | |
205 | * @v4l2_dev: pointer to struct v4l2_device | |
206 | */ | |
207 | static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev) | |
208 | { | |
209 | return v4l2_dev->mdev && v4l2_dev->mdev->ops && | |
210 | v4l2_dev->mdev->ops->req_queue; | |
211 | } | |
212 | ||
d651ff91 MCC |
213 | /* Helper macros to iterate over all subdevs. */ |
214 | ||
215 | /** | |
216 | * v4l2_device_for_each_subdev - Helper macro that interates over all | |
217 | * sub-devices of a given &v4l2_device. | |
218 | * | |
219 | * @sd: pointer that will be filled by the macro with all | |
220 | * &struct v4l2_subdev pointer used as an iterator by the loop. | |
221 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
222 | * | |
223 | * This macro iterates over all sub-devices owned by the @v4l2_dev device. | |
224 | * It acts as a for loop iterator and executes the next statement with | |
225 | * the @sd variable pointing to each sub-device in turn. | |
226 | */ | |
3a63e449 HV |
227 | #define v4l2_device_for_each_subdev(sd, v4l2_dev) \ |
228 | list_for_each_entry(sd, &(v4l2_dev)->subdevs, list) | |
2a1fcdf0 | 229 | |
d651ff91 MCC |
230 | /** |
231 | * __v4l2_device_call_subdevs_p - Calls the specified operation for | |
232 | * all subdevs matching the condition. | |
233 | * | |
234 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
235 | * @sd: pointer that will be filled by the macro with all | |
236 | * &struct v4l2_subdev pointer used as an iterator by the loop. | |
237 | * @cond: condition to be match | |
238 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
239 | * Each element there groups a set of operations functions. | |
240 | * @f: operation function that will be called if @cond matches. | |
241 | * The operation functions are defined in groups, according to | |
242 | * each element at &struct v4l2_subdev_ops. | |
243 | * @args...: arguments for @f. | |
244 | * | |
245 | * Ignore any errors. | |
246 | * | |
247 | * Note: subdevs cannot be added or deleted while walking | |
248 | * the subdevs list. | |
249 | */ | |
6c2d4dd1 | 250 | #define __v4l2_device_call_subdevs_p(v4l2_dev, sd, cond, o, f, args...) \ |
65d7aba0 | 251 | do { \ |
6c2d4dd1 GL |
252 | list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) \ |
253 | if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \ | |
254 | (sd)->ops->o->f((sd) , ##args); \ | |
255 | } while (0) | |
256 | ||
d651ff91 MCC |
257 | /** |
258 | * __v4l2_device_call_subdevs - Calls the specified operation for | |
259 | * all subdevs matching the condition. | |
260 | * | |
261 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
262 | * @cond: condition to be match | |
263 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
264 | * Each element there groups a set of operations functions. | |
265 | * @f: operation function that will be called if @cond matches. | |
266 | * The operation functions are defined in groups, according to | |
267 | * each element at &struct v4l2_subdev_ops. | |
268 | * @args...: arguments for @f. | |
269 | * | |
270 | * Ignore any errors. | |
271 | * | |
272 | * Note: subdevs cannot be added or deleted while walking | |
273 | * the subdevs list. | |
274 | */ | |
6c2d4dd1 GL |
275 | #define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \ |
276 | do { \ | |
277 | struct v4l2_subdev *__sd; \ | |
2a1fcdf0 | 278 | \ |
6c2d4dd1 GL |
279 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, cond, o, \ |
280 | f , ##args); \ | |
2a1fcdf0 HV |
281 | } while (0) |
282 | ||
d651ff91 MCC |
283 | /** |
284 | * __v4l2_device_call_subdevs_until_err_p - Calls the specified operation for | |
285 | * all subdevs matching the condition. | |
286 | * | |
287 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
288 | * @sd: pointer that will be filled by the macro with all | |
289 | * &struct v4l2_subdev sub-devices associated with @v4l2_dev. | |
290 | * @cond: condition to be match | |
291 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
292 | * Each element there groups a set of operations functions. | |
293 | * @f: operation function that will be called if @cond matches. | |
294 | * The operation functions are defined in groups, according to | |
295 | * each element at &struct v4l2_subdev_ops. | |
296 | * @args...: arguments for @f. | |
297 | * | |
298 | * Return: | |
299 | * | |
300 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
301 | * for any subdevice, then abort and return with that error code, zero | |
302 | * otherwise. | |
303 | * | |
304 | * Note: subdevs cannot be added or deleted while walking | |
305 | * the subdevs list. | |
306 | */ | |
6c2d4dd1 | 307 | #define __v4l2_device_call_subdevs_until_err_p(v4l2_dev, sd, cond, o, f, args...) \ |
65d7aba0 | 308 | ({ \ |
6c2d4dd1 | 309 | long __err = 0; \ |
2a1fcdf0 | 310 | \ |
6c2d4dd1 GL |
311 | list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) { \ |
312 | if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \ | |
313 | __err = (sd)->ops->o->f((sd) , ##args); \ | |
314 | if (__err && __err != -ENOIOCTLCMD) \ | |
65d7aba0 MCC |
315 | break; \ |
316 | } \ | |
6c2d4dd1 GL |
317 | (__err == -ENOIOCTLCMD) ? 0 : __err; \ |
318 | }) | |
319 | ||
d651ff91 MCC |
320 | /** |
321 | * __v4l2_device_call_subdevs_until_err - Calls the specified operation for | |
322 | * all subdevs matching the condition. | |
323 | * | |
324 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
325 | * @cond: condition to be match | |
326 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
327 | * Each element there groups a set of operations functions. | |
328 | * @f: operation function that will be called if @cond matches. | |
329 | * The operation functions are defined in groups, according to | |
330 | * each element at &struct v4l2_subdev_ops. | |
331 | * @args...: arguments for @f. | |
332 | * | |
333 | * Return: | |
334 | * | |
335 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
336 | * for any subdevice, then abort and return with that error code, | |
337 | * zero otherwise. | |
338 | * | |
339 | * Note: subdevs cannot be added or deleted while walking | |
340 | * the subdevs list. | |
341 | */ | |
6c2d4dd1 GL |
342 | #define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \ |
343 | ({ \ | |
344 | struct v4l2_subdev *__sd; \ | |
345 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, cond, o, \ | |
c6c73544 | 346 | f , ##args); \ |
2a1fcdf0 HV |
347 | }) |
348 | ||
d651ff91 MCC |
349 | /** |
350 | * v4l2_device_call_all - Calls the specified operation for | |
351 | * all subdevs matching the &v4l2_subdev.grp_id, as assigned | |
352 | * by the bridge driver. | |
353 | * | |
354 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
355 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
356 | * Use 0 to match them all. | |
357 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
358 | * Each element there groups a set of operations functions. | |
359 | * @f: operation function that will be called if @cond matches. | |
360 | * The operation functions are defined in groups, according to | |
361 | * each element at &struct v4l2_subdev_ops. | |
362 | * @args...: arguments for @f. | |
363 | * | |
364 | * Ignore any errors. | |
365 | * | |
366 | * Note: subdevs cannot be added or deleted while walking | |
367 | * the subdevs list. | |
368 | */ | |
6c2d4dd1 GL |
369 | #define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \ |
370 | do { \ | |
371 | struct v4l2_subdev *__sd; \ | |
372 | \ | |
373 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \ | |
374 | !(grpid) || __sd->grp_id == (grpid), o, f , \ | |
375 | ##args); \ | |
376 | } while (0) | |
2a1fcdf0 | 377 | |
d651ff91 MCC |
378 | /** |
379 | * v4l2_device_call_until_err - Calls the specified operation for | |
380 | * all subdevs matching the &v4l2_subdev.grp_id, as assigned | |
381 | * by the bridge driver, until an error occurs. | |
382 | * | |
383 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
384 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
385 | * Use 0 to match them all. | |
386 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
387 | * Each element there groups a set of operations functions. | |
388 | * @f: operation function that will be called if @cond matches. | |
389 | * The operation functions are defined in groups, according to | |
390 | * each element at &struct v4l2_subdev_ops. | |
391 | * @args...: arguments for @f. | |
392 | * | |
393 | * Return: | |
394 | * | |
395 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
396 | * for any subdevice, then abort and return with that error code, | |
397 | * zero otherwise. | |
398 | * | |
399 | * Note: subdevs cannot be added or deleted while walking | |
400 | * the subdevs list. | |
401 | */ | |
65d7aba0 | 402 | #define v4l2_device_call_until_err(v4l2_dev, grpid, o, f, args...) \ |
6c2d4dd1 GL |
403 | ({ \ |
404 | struct v4l2_subdev *__sd; \ | |
405 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \ | |
406 | !(grpid) || __sd->grp_id == (grpid), o, f , \ | |
407 | ##args); \ | |
408 | }) | |
2a1fcdf0 | 409 | |
d651ff91 MCC |
410 | /** |
411 | * v4l2_device_mask_call_all - Calls the specified operation for | |
412 | * all subdevices where a group ID matches a specified bitmask. | |
413 | * | |
414 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
415 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
416 | * group ID to be matched. Use 0 to match them all. | |
417 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
418 | * Each element there groups a set of operations functions. | |
419 | * @f: operation function that will be called if @cond matches. | |
420 | * The operation functions are defined in groups, according to | |
421 | * each element at &struct v4l2_subdev_ops. | |
422 | * @args...: arguments for @f. | |
423 | * | |
424 | * Ignore any errors. | |
425 | * | |
426 | * Note: subdevs cannot be added or deleted while walking | |
427 | * the subdevs list. | |
96655553 HV |
428 | */ |
429 | #define v4l2_device_mask_call_all(v4l2_dev, grpmsk, o, f, args...) \ | |
430 | do { \ | |
431 | struct v4l2_subdev *__sd; \ | |
432 | \ | |
433 | __v4l2_device_call_subdevs_p(v4l2_dev, __sd, \ | |
434 | !(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \ | |
435 | ##args); \ | |
436 | } while (0) | |
437 | ||
d651ff91 MCC |
438 | /** |
439 | * v4l2_device_mask_call_until_err - Calls the specified operation for | |
440 | * all subdevices where a group ID matches a specified bitmask. | |
441 | * | |
442 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
443 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
444 | * group ID to be matched. Use 0 to match them all. | |
445 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
446 | * Each element there groups a set of operations functions. | |
447 | * @f: operation function that will be called if @cond matches. | |
448 | * The operation functions are defined in groups, according to | |
449 | * each element at &struct v4l2_subdev_ops. | |
450 | * @args...: arguments for @f. | |
451 | * | |
452 | * Return: | |
453 | * | |
454 | * If the operation returns an error other than 0 or ``-ENOIOCTLCMD`` | |
455 | * for any subdevice, then abort and return with that error code, | |
456 | * zero otherwise. | |
457 | * | |
458 | * Note: subdevs cannot be added or deleted while walking | |
459 | * the subdevs list. | |
96655553 HV |
460 | */ |
461 | #define v4l2_device_mask_call_until_err(v4l2_dev, grpmsk, o, f, args...) \ | |
462 | ({ \ | |
463 | struct v4l2_subdev *__sd; \ | |
464 | __v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \ | |
465 | !(grpmsk) || (__sd->grp_id & (grpmsk)), o, f , \ | |
466 | ##args); \ | |
467 | }) | |
468 | ||
d651ff91 MCC |
469 | |
470 | /** | |
471 | * v4l2_device_has_op - checks if any subdev with matching grpid has a | |
472 | * given ops. | |
473 | * | |
474 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
475 | * @grpid: &struct v4l2_subdev->grp_id group ID to match. | |
476 | * Use 0 to match them all. | |
477 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
478 | * Each element there groups a set of operations functions. | |
479 | * @f: operation function that will be called if @cond matches. | |
480 | * The operation functions are defined in groups, according to | |
481 | * each element at &struct v4l2_subdev_ops. | |
96655553 HV |
482 | */ |
483 | #define v4l2_device_has_op(v4l2_dev, grpid, o, f) \ | |
484 | ({ \ | |
485 | struct v4l2_subdev *__sd; \ | |
486 | bool __result = false; \ | |
487 | list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \ | |
488 | if ((grpid) && __sd->grp_id != (grpid)) \ | |
489 | continue; \ | |
490 | if (v4l2_subdev_has_op(__sd, o, f)) { \ | |
491 | __result = true; \ | |
492 | break; \ | |
493 | } \ | |
494 | } \ | |
495 | __result; \ | |
496 | }) | |
497 | ||
d651ff91 MCC |
498 | /** |
499 | * v4l2_device_mask_has_op - checks if any subdev with matching group | |
500 | * mask has a given ops. | |
501 | * | |
502 | * @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over. | |
503 | * @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id | |
504 | * group ID to be matched. Use 0 to match them all. | |
505 | * @o: name of the element at &struct v4l2_subdev_ops that contains @f. | |
506 | * Each element there groups a set of operations functions. | |
507 | * @f: operation function that will be called if @cond matches. | |
508 | * The operation functions are defined in groups, according to | |
509 | * each element at &struct v4l2_subdev_ops. | |
96655553 HV |
510 | */ |
511 | #define v4l2_device_mask_has_op(v4l2_dev, grpmsk, o, f) \ | |
2180f92d HV |
512 | ({ \ |
513 | struct v4l2_subdev *__sd; \ | |
514 | bool __result = false; \ | |
515 | list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \ | |
96655553 HV |
516 | if ((grpmsk) && !(__sd->grp_id & (grpmsk))) \ |
517 | continue; \ | |
2180f92d HV |
518 | if (v4l2_subdev_has_op(__sd, o, f)) { \ |
519 | __result = true; \ | |
520 | break; \ | |
521 | } \ | |
522 | } \ | |
523 | __result; \ | |
524 | }) | |
525 | ||
2a1fcdf0 | 526 | #endif |