mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-11 21:14:07 +08:00
b064945517
Some identifiers have different names between their prototypes and the kernel-doc markup. Seome seems to be due to cut-and-paste related issues. Others need to be fixed, as kernel-doc markups should use this format: identifier - description Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> # IPU3 and V4L2 Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
569 lines
18 KiB
C
569 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
V4L2 device support header.
|
|
|
|
Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
|
|
|
|
*/
|
|
|
|
#ifndef _V4L2_DEVICE_H
|
|
#define _V4L2_DEVICE_H
|
|
|
|
#include <media/media-device.h>
|
|
#include <media/v4l2-subdev.h>
|
|
#include <media/v4l2-dev.h>
|
|
|
|
#define V4L2_DEVICE_NAME_SIZE (20 + 16)
|
|
|
|
struct v4l2_ctrl_handler;
|
|
|
|
/**
|
|
* struct v4l2_device - main struct to for V4L2 device drivers
|
|
*
|
|
* @dev: pointer to struct device.
|
|
* @mdev: pointer to struct media_device, may be NULL.
|
|
* @subdevs: used to keep track of the registered subdevs
|
|
* @lock: lock this struct; can be used by the driver as well
|
|
* if this struct is embedded into a larger struct.
|
|
* @name: unique device name, by default the driver name + bus ID
|
|
* @notify: notify operation called by some sub-devices.
|
|
* @ctrl_handler: The control handler. May be %NULL.
|
|
* @prio: Device's priority state
|
|
* @ref: Keep track of the references to this struct.
|
|
* @release: Release function that is called when the ref count
|
|
* goes to 0.
|
|
*
|
|
* Each instance of a V4L2 device should create the v4l2_device struct,
|
|
* either stand-alone or embedded in a larger struct.
|
|
*
|
|
* It allows easy access to sub-devices (see v4l2-subdev.h) and provides
|
|
* basic V4L2 device-level support.
|
|
*
|
|
* .. note::
|
|
*
|
|
* #) @dev->driver_data points to this struct.
|
|
* #) @dev might be %NULL if there is no parent device
|
|
*/
|
|
struct v4l2_device {
|
|
struct device *dev;
|
|
struct media_device *mdev;
|
|
struct list_head subdevs;
|
|
spinlock_t lock;
|
|
char name[V4L2_DEVICE_NAME_SIZE];
|
|
void (*notify)(struct v4l2_subdev *sd,
|
|
unsigned int notification, void *arg);
|
|
struct v4l2_ctrl_handler *ctrl_handler;
|
|
struct v4l2_prio_state prio;
|
|
struct kref ref;
|
|
void (*release)(struct v4l2_device *v4l2_dev);
|
|
};
|
|
|
|
/**
|
|
* v4l2_device_get - gets a V4L2 device reference
|
|
*
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
*
|
|
* This is an ancillary routine meant to increment the usage for the
|
|
* struct &v4l2_device pointed by @v4l2_dev.
|
|
*/
|
|
static inline void v4l2_device_get(struct v4l2_device *v4l2_dev)
|
|
{
|
|
kref_get(&v4l2_dev->ref);
|
|
}
|
|
|
|
/**
|
|
* v4l2_device_put - puts a V4L2 device reference
|
|
*
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
*
|
|
* This is an ancillary routine meant to decrement the usage for the
|
|
* struct &v4l2_device pointed by @v4l2_dev.
|
|
*/
|
|
int v4l2_device_put(struct v4l2_device *v4l2_dev);
|
|
|
|
/**
|
|
* v4l2_device_register - Initialize v4l2_dev and make @dev->driver_data
|
|
* point to @v4l2_dev.
|
|
*
|
|
* @dev: pointer to struct &device
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
*
|
|
* .. note::
|
|
* @dev may be %NULL in rare cases (ISA devices).
|
|
* In such case the caller must fill in the @v4l2_dev->name field
|
|
* before calling this function.
|
|
*/
|
|
int __must_check v4l2_device_register(struct device *dev,
|
|
struct v4l2_device *v4l2_dev);
|
|
|
|
/**
|
|
* v4l2_device_set_name - Optional function to initialize the
|
|
* name field of struct &v4l2_device
|
|
*
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
* @basename: base name for the device name
|
|
* @instance: pointer to a static atomic_t var with the instance usage for
|
|
* the device driver.
|
|
*
|
|
* v4l2_device_set_name() initializes the name field of struct &v4l2_device
|
|
* using the driver name and a driver-global atomic_t instance.
|
|
*
|
|
* This function will increment the instance counter and returns the
|
|
* instance value used in the name.
|
|
*
|
|
* Example:
|
|
*
|
|
* static atomic_t drv_instance = ATOMIC_INIT(0);
|
|
*
|
|
* ...
|
|
*
|
|
* instance = v4l2_device_set_name(&\ v4l2_dev, "foo", &\ drv_instance);
|
|
*
|
|
* The first time this is called the name field will be set to foo0 and
|
|
* this function returns 0. If the name ends with a digit (e.g. cx18),
|
|
* then the name will be set to cx18-0 since cx180 would look really odd.
|
|
*/
|
|
int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
|
|
atomic_t *instance);
|
|
|
|
/**
|
|
* v4l2_device_disconnect - Change V4L2 device state to disconnected.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
*
|
|
* Should be called when the USB parent disconnects.
|
|
* Since the parent disappears, this ensures that @v4l2_dev doesn't have
|
|
* an invalid parent pointer.
|
|
*
|
|
* .. note:: This function sets @v4l2_dev->dev to NULL.
|
|
*/
|
|
void v4l2_device_disconnect(struct v4l2_device *v4l2_dev);
|
|
|
|
/**
|
|
* v4l2_device_unregister - Unregister all sub-devices and any other
|
|
* resources related to @v4l2_dev.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
*/
|
|
void v4l2_device_unregister(struct v4l2_device *v4l2_dev);
|
|
|
|
/**
|
|
* v4l2_device_register_subdev - Registers a subdev with a v4l2 device.
|
|
*
|
|
* @v4l2_dev: pointer to struct &v4l2_device
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*
|
|
* While registered, the subdev module is marked as in-use.
|
|
*
|
|
* An error is returned if the module is no longer loaded on any attempts
|
|
* to register it.
|
|
*/
|
|
int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
|
|
struct v4l2_subdev *sd);
|
|
|
|
/**
|
|
* v4l2_device_unregister_subdev - Unregisters a subdev with a v4l2 device.
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*
|
|
* .. note ::
|
|
*
|
|
* Can also be called if the subdev wasn't registered. In such
|
|
* case, it will do nothing.
|
|
*/
|
|
void v4l2_device_unregister_subdev(struct v4l2_subdev *sd);
|
|
|
|
/**
|
|
* __v4l2_device_register_subdev_nodes - Registers device nodes for
|
|
* all subdevs of the v4l2 device that are marked with the
|
|
* %V4L2_SUBDEV_FL_HAS_DEVNODE flag.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
* @read_only: subdevices read-only flag. True to register the subdevices
|
|
* device nodes in read-only mode, false to allow full access to the
|
|
* subdevice userspace API.
|
|
*/
|
|
int __must_check
|
|
__v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev,
|
|
bool read_only);
|
|
|
|
/**
|
|
* v4l2_device_register_subdev_nodes - Registers subdevices device nodes with
|
|
* unrestricted access to the subdevice userspace operations
|
|
*
|
|
* Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
|
|
* for more details.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
*/
|
|
static inline int __must_check
|
|
v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
|
|
{
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
return __v4l2_device_register_subdev_nodes(v4l2_dev, false);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* v4l2_device_register_ro_subdev_nodes - Registers subdevices device nodes
|
|
* in read-only mode
|
|
*
|
|
* Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
|
|
* for more details.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
*/
|
|
static inline int __must_check
|
|
v4l2_device_register_ro_subdev_nodes(struct v4l2_device *v4l2_dev)
|
|
{
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
return __v4l2_device_register_subdev_nodes(v4l2_dev, true);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* v4l2_subdev_notify - Sends a notification to v4l2_device.
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @notification: type of notification. Please notice that the notification
|
|
* type is driver-specific.
|
|
* @arg: arguments for the notification. Those are specific to each
|
|
* notification type.
|
|
*/
|
|
static inline void v4l2_subdev_notify(struct v4l2_subdev *sd,
|
|
unsigned int notification, void *arg)
|
|
{
|
|
if (sd && sd->v4l2_dev && sd->v4l2_dev->notify)
|
|
sd->v4l2_dev->notify(sd, notification, arg);
|
|
}
|
|
|
|
/**
|
|
* v4l2_device_supports_requests - Test if requests are supported.
|
|
*
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
*/
|
|
static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
|
|
{
|
|
return v4l2_dev->mdev && v4l2_dev->mdev->ops &&
|
|
v4l2_dev->mdev->ops->req_queue;
|
|
}
|
|
|
|
/* Helper macros to iterate over all subdevs. */
|
|
|
|
/**
|
|
* v4l2_device_for_each_subdev - Helper macro that interates over all
|
|
* sub-devices of a given &v4l2_device.
|
|
*
|
|
* @sd: pointer that will be filled by the macro with all
|
|
* &struct v4l2_subdev pointer used as an iterator by the loop.
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
*
|
|
* This macro iterates over all sub-devices owned by the @v4l2_dev device.
|
|
* It acts as a for loop iterator and executes the next statement with
|
|
* the @sd variable pointing to each sub-device in turn.
|
|
*/
|
|
#define v4l2_device_for_each_subdev(sd, v4l2_dev) \
|
|
list_for_each_entry(sd, &(v4l2_dev)->subdevs, list)
|
|
|
|
/**
|
|
* __v4l2_device_call_subdevs_p - Calls the specified operation for
|
|
* all subdevs matching the condition.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @sd: pointer that will be filled by the macro with all
|
|
* &struct v4l2_subdev pointer used as an iterator by the loop.
|
|
* @cond: condition to be match
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Ignore any errors.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define __v4l2_device_call_subdevs_p(v4l2_dev, sd, cond, o, f, args...) \
|
|
do { \
|
|
list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) \
|
|
if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
|
|
(sd)->ops->o->f((sd) , ##args); \
|
|
} while (0)
|
|
|
|
/**
|
|
* __v4l2_device_call_subdevs - Calls the specified operation for
|
|
* all subdevs matching the condition.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @cond: condition to be match
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Ignore any errors.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define __v4l2_device_call_subdevs(v4l2_dev, cond, o, f, args...) \
|
|
do { \
|
|
struct v4l2_subdev *__sd; \
|
|
\
|
|
__v4l2_device_call_subdevs_p(v4l2_dev, __sd, cond, o, \
|
|
f , ##args); \
|
|
} while (0)
|
|
|
|
/**
|
|
* __v4l2_device_call_subdevs_until_err_p - Calls the specified operation for
|
|
* all subdevs matching the condition.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @sd: pointer that will be filled by the macro with all
|
|
* &struct v4l2_subdev sub-devices associated with @v4l2_dev.
|
|
* @cond: condition to be match
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Return:
|
|
*
|
|
* If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
|
|
* for any subdevice, then abort and return with that error code, zero
|
|
* otherwise.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define __v4l2_device_call_subdevs_until_err_p(v4l2_dev, sd, cond, o, f, args...) \
|
|
({ \
|
|
long __err = 0; \
|
|
\
|
|
list_for_each_entry((sd), &(v4l2_dev)->subdevs, list) { \
|
|
if ((cond) && (sd)->ops->o && (sd)->ops->o->f) \
|
|
__err = (sd)->ops->o->f((sd) , ##args); \
|
|
if (__err && __err != -ENOIOCTLCMD) \
|
|
break; \
|
|
} \
|
|
(__err == -ENOIOCTLCMD) ? 0 : __err; \
|
|
})
|
|
|
|
/**
|
|
* __v4l2_device_call_subdevs_until_err - Calls the specified operation for
|
|
* all subdevs matching the condition.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @cond: condition to be match
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Return:
|
|
*
|
|
* If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
|
|
* for any subdevice, then abort and return with that error code,
|
|
* zero otherwise.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define __v4l2_device_call_subdevs_until_err(v4l2_dev, cond, o, f, args...) \
|
|
({ \
|
|
struct v4l2_subdev *__sd; \
|
|
__v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, cond, o, \
|
|
f , ##args); \
|
|
})
|
|
|
|
/**
|
|
* v4l2_device_call_all - Calls the specified operation for
|
|
* all subdevs matching the &v4l2_subdev.grp_id, as assigned
|
|
* by the bridge driver.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpid: &struct v4l2_subdev->grp_id group ID to match.
|
|
* Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Ignore any errors.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define v4l2_device_call_all(v4l2_dev, grpid, o, f, args...) \
|
|
do { \
|
|
struct v4l2_subdev *__sd; \
|
|
\
|
|
__v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
|
|
(grpid) == 0 || __sd->grp_id == (grpid), o, f , \
|
|
##args); \
|
|
} while (0)
|
|
|
|
/**
|
|
* v4l2_device_call_until_err - Calls the specified operation for
|
|
* all subdevs matching the &v4l2_subdev.grp_id, as assigned
|
|
* by the bridge driver, until an error occurs.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpid: &struct v4l2_subdev->grp_id group ID to match.
|
|
* Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Return:
|
|
*
|
|
* If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
|
|
* for any subdevice, then abort and return with that error code,
|
|
* zero otherwise.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define v4l2_device_call_until_err(v4l2_dev, grpid, o, f, args...) \
|
|
({ \
|
|
struct v4l2_subdev *__sd; \
|
|
__v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
|
|
(grpid) == 0 || __sd->grp_id == (grpid), o, f , \
|
|
##args); \
|
|
})
|
|
|
|
/**
|
|
* v4l2_device_mask_call_all - Calls the specified operation for
|
|
* all subdevices where a group ID matches a specified bitmask.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
|
|
* group ID to be matched. Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Ignore any errors.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define v4l2_device_mask_call_all(v4l2_dev, grpmsk, o, f, args...) \
|
|
do { \
|
|
struct v4l2_subdev *__sd; \
|
|
\
|
|
__v4l2_device_call_subdevs_p(v4l2_dev, __sd, \
|
|
(grpmsk) == 0 || (__sd->grp_id & (grpmsk)), o, \
|
|
f , ##args); \
|
|
} while (0)
|
|
|
|
/**
|
|
* v4l2_device_mask_call_until_err - Calls the specified operation for
|
|
* all subdevices where a group ID matches a specified bitmask.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
|
|
* group ID to be matched. Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
* @args: arguments for @f.
|
|
*
|
|
* Return:
|
|
*
|
|
* If the operation returns an error other than 0 or ``-ENOIOCTLCMD``
|
|
* for any subdevice, then abort and return with that error code,
|
|
* zero otherwise.
|
|
*
|
|
* Note: subdevs cannot be added or deleted while walking
|
|
* the subdevs list.
|
|
*/
|
|
#define v4l2_device_mask_call_until_err(v4l2_dev, grpmsk, o, f, args...) \
|
|
({ \
|
|
struct v4l2_subdev *__sd; \
|
|
__v4l2_device_call_subdevs_until_err_p(v4l2_dev, __sd, \
|
|
(grpmsk) == 0 || (__sd->grp_id & (grpmsk)), o, \
|
|
f , ##args); \
|
|
})
|
|
|
|
|
|
/**
|
|
* v4l2_device_has_op - checks if any subdev with matching grpid has a
|
|
* given ops.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpid: &struct v4l2_subdev->grp_id group ID to match.
|
|
* Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
*/
|
|
#define v4l2_device_has_op(v4l2_dev, grpid, o, f) \
|
|
({ \
|
|
struct v4l2_subdev *__sd; \
|
|
bool __result = false; \
|
|
list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
|
|
if ((grpid) && __sd->grp_id != (grpid)) \
|
|
continue; \
|
|
if (v4l2_subdev_has_op(__sd, o, f)) { \
|
|
__result = true; \
|
|
break; \
|
|
} \
|
|
} \
|
|
__result; \
|
|
})
|
|
|
|
/**
|
|
* v4l2_device_mask_has_op - checks if any subdev with matching group
|
|
* mask has a given ops.
|
|
*
|
|
* @v4l2_dev: &struct v4l2_device owning the sub-devices to iterate over.
|
|
* @grpmsk: bitmask to be checked against &struct v4l2_subdev->grp_id
|
|
* group ID to be matched. Use 0 to match them all.
|
|
* @o: name of the element at &struct v4l2_subdev_ops that contains @f.
|
|
* Each element there groups a set of operations functions.
|
|
* @f: operation function that will be called if @cond matches.
|
|
* The operation functions are defined in groups, according to
|
|
* each element at &struct v4l2_subdev_ops.
|
|
*/
|
|
#define v4l2_device_mask_has_op(v4l2_dev, grpmsk, o, f) \
|
|
({ \
|
|
struct v4l2_subdev *__sd; \
|
|
bool __result = false; \
|
|
list_for_each_entry(__sd, &(v4l2_dev)->subdevs, list) { \
|
|
if ((grpmsk) && !(__sd->grp_id & (grpmsk))) \
|
|
continue; \
|
|
if (v4l2_subdev_has_op(__sd, o, f)) { \
|
|
__result = true; \
|
|
break; \
|
|
} \
|
|
} \
|
|
__result; \
|
|
})
|
|
|
|
#endif
|