diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2011-01-08 10:15:53 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-01-19 13:45:31 (GMT) |
| commit | 45f6f84af3ae9db19f39bc5d0976d626b0ef626e (patch) | |
| tree | f3ef2f5bb782f5d7180c5cc2a8ab58fd855a4ccf /include/media | |
| parent | 3c7c9370fb645f4713e0fbbe69425d8db9b47a13 (diff) | |
| download | linux-45f6f84af3ae9db19f39bc5d0976d626b0ef626e.tar.xz | |
[media] v4l2-subdev: add (un)register internal ops
Some subdevs need to call into the board code after they are registered
and have a valid struct v4l2_device pointer. The s_config op was abused
for this, but now that it is removed we need a cleaner way of solving this.
So this patch adds a struct with internal ops that the v4l2 core can call.
Currently only two ops exist: register and unregister. Subdevs can implement
these to call the board code and pass it the v4l2_device pointer, which the
board code can then use to get access to the struct that embeds the
v4l2_device.
It is expected that in the future open and close ops will also be added.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-subdev.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 42fbe46..daf1e57 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -411,6 +411,21 @@ struct v4l2_subdev_ops { const struct v4l2_subdev_sensor_ops *sensor; }; +/* + * Internal ops. Never call this from drivers, only the v4l2 framework can call + * these ops. + * + * registered: called when this subdev is registered. When called the v4l2_dev + * field is set to the correct v4l2_device. + * + * unregistered: called when this subdev is unregistered. When called the + * v4l2_dev field is still set to the correct v4l2_device. + */ +struct v4l2_subdev_internal_ops { + int (*registered)(struct v4l2_subdev *sd); + void (*unregistered)(struct v4l2_subdev *sd); +}; + #define V4L2_SUBDEV_NAME_SIZE 32 /* Set this flag if this subdev is a i2c device. */ @@ -427,6 +442,8 @@ struct v4l2_subdev { u32 flags; struct v4l2_device *v4l2_dev; const struct v4l2_subdev_ops *ops; + /* Never call these internal ops from within a driver! */ + const struct v4l2_subdev_internal_ops *internal_ops; /* The control handler of this subdev. May be NULL. */ struct v4l2_ctrl_handler *ctrl_handler; /* name must be unique */ |