diff options
Diffstat (limited to 'linux/include/media/v4l2-device.h')
| -rw-r--r-- | linux/include/media/v4l2-device.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/linux/include/media/v4l2-device.h b/linux/include/media/v4l2-device.h index 5d7146dc2..0dd3e8e86 100644 --- a/linux/include/media/v4l2-device.h +++ b/linux/include/media/v4l2-device.h @@ -44,13 +44,20 @@ struct v4l2_device { spinlock_t lock; /* unique device name, by default the driver name + bus ID */ char name[V4L2_DEVICE_NAME_SIZE]; + /* notify callback called by some sub-devices. */ + void (*notify)(struct v4l2_subdev *sd, + unsigned int notification, void *arg); }; /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev. dev may be NULL in rare cases (ISA devices). In that case you 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); -/* Set v4l2_dev->dev->driver_data to NULL and unregister all sub-devices */ +/* Set v4l2_dev->dev to NULL. Call when the USB parent disconnects. + Since the parent disappears this ensures that v4l2_dev doesn't have an + invalid parent pointer. */ +void v4l2_device_disconnect(struct v4l2_device *v4l2_dev); +/* Unregister all sub-devices and any other resources related to v4l2_dev. */ void v4l2_device_unregister(struct v4l2_device *v4l2_dev); /* Register a subdev with a v4l2 device. While registered the subdev module |