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[media] v4l: subdev: Events support

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Provide v4l2_subdevs with v4l2_event support. Subdev drivers only need very
little to support events.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: David Cohen <dacohen@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sakari Ailus
2010-03-03 12:49:38 -03:00
committed by Mauro Carvalho Chehab
parent ea8aa4349e
commit 02adb1cc76
3 changed files with 105 additions and 1 deletions
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10
include/media/v4l2-subdev.h
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@@ -37,6 +37,8 @@
struct v4l2_device;
struct v4l2_ctrl_handler;
struct v4l2_event_subscription;
struct v4l2_fh;
struct v4l2_subdev;
struct tuner_setup;
@@ -161,6 +163,10 @@ struct v4l2_subdev_core_ops {
int (*s_power)(struct v4l2_subdev *sd, int on);
int (*interrupt_service_routine)(struct v4l2_subdev *sd,
u32 status, bool *handled);
int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
};
/* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio.
@@ -437,6 +443,8 @@ struct v4l2_subdev_internal_ops {
#define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
/* Set this flag if this subdev needs a device node. */
#define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
/* Set this flag if this subdev generates events. */
#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
/* Each instance of a subdev driver should create this struct, either
stand-alone or embedded in a larger struct.
@@ -460,6 +468,8 @@ struct v4l2_subdev {
void *host_priv;
/* subdev device node */
struct video_device devnode;
/* number of events to be allocated on open */
unsigned int nevents;
};
#define vdev_to_v4l2_subdev(vdev) \