From 98ec633972a70cf71d71bc8762804f0af4792d08 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 8 Mar 2009 17:02:10 -0300 Subject: V4L/DVB (11021): v4l2-device: add a notify callback. Add a notify callback to v4l2_device to let sub-devices notify their parent of special events. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- include/media/v4l2-device.h | 3 +++ include/media/v4l2-subdev.h | 5 +++++ 2 files changed, 8 insertions(+) (limited to 'include') diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index 5d7146dc2913..3d8e96f6ceb3 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h @@ -44,6 +44,9 @@ 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. diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 05b69652e6c4..1b97a2c33a73 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -191,4 +191,9 @@ static inline void v4l2_subdev_init(struct v4l2_subdev *sd, (!(sd) ? -ENODEV : (((sd) && (sd)->ops->o && (sd)->ops->o->f) ? \ (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD)) +/* Send a notification to v4l2_device. */ +#define v4l2_subdev_notify(sd, notification, arg) \ + ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \ + (sd)->v4l2_dev->notify((sd), (notification), (arg))) + #endif -- cgit v1.2.3