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media: v4l2-async: Add v4l2_async_notifier_add_fwnode_remote_subdev

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v4l2_async_notifier_add_fwnode_remote_subdev is a convenience function for
parsing information on V4L2 fwnode subdevs.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Sakari Ailus 2019-02-28 08:25:28 -05:00 committed by Mauro Carvalho Chehab
parent 016413d967
commit 820342aca0
2 changed files with 48 additions and 0 deletions
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23
drivers/media/v4l2-core/v4l2-async.c
View File

@ -606,6 +606,29 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_subdev);
int
v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif,
struct fwnode_handle *endpoint,
struct v4l2_async_subdev *asd)
{
struct fwnode_handle *remote;
int ret;
remote = fwnode_graph_get_remote_port_parent(endpoint);
if (!remote)
return -ENOTCONN;
asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
asd->match.fwnode = remote;
ret = v4l2_async_notifier_add_subdev(notif, asd);
if (ret)
fwnode_handle_put(remote);
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_remote_subdev);
struct v4l2_async_subdev *
v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
int adapter_id, unsigned short address,

25
include/media/v4l2-async.h
View File

@ -181,6 +181,31 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
struct fwnode_handle *fwnode,
unsigned int asd_struct_size);
/**
* v4l2_async_notifier_add_fwnode_remote_subdev - Allocate and add a fwnode
* remote async subdev to the
* notifier's master asd_list.
*
* @notif: pointer to &struct v4l2_async_notifier
* @endpoint: local endpoint pointing to the remote sub-device to be matched
* @asd: Async sub-device struct allocated by the caller. The &struct
* v4l2_async_subdev shall be the first member of the driver's async
* sub-device struct, i.e. both begin at the same memory address.
*
* Gets the remote endpoint of a given local endpoint, set it up for fwnode
* matching and adds the async sub-device to the notifier's @asd_list. The
* function also gets a reference of the fwnode which is released later at
* notifier cleanup time.
*
* This is just like @v4l2_async_notifier_add_fwnode_subdev, but with the
* exception that the fwnode refers to a local endpoint, not the remote one, and
* the function relies on the caller to allocate the async sub-device struct.
*/
int
v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif,
struct fwnode_handle *endpoint,
struct v4l2_async_subdev *asd);
/**
* v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
* subdev to the notifier's master asd_list.