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| author |   Steve Longerbeam <slongerbeam@gmail.com> | 2018-09-29 15:54:09 -0400 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-10-04 15:34:24 -0400 |
| commit | 1634f0eded87d1f150e823fa56cd782ea0775eb2 (patch) | |
| tree | 3d275cbd636c85955440ac61be383a505c850ed0 /include/media | |
| parent | media: v4l2-fwnode: Switch to v4l2_async_notifier_add_subdev (diff) | |
| download | linux-dev-1634f0eded87d1f150e823fa56cd782ea0775eb2.tar.xz linux-dev-1634f0eded87d1f150e823fa56cd782ea0775eb2.zip | |
media: v4l2-fwnode: Add a convenience function for registering subdevs with notifiers
Adds v4l2_async_register_fwnode_subdev(), which is a convenience function
for parsing a sub-device's fwnode port endpoints for connected remote
sub-devices, registering a sub-device notifier, and then registering
the sub-device itself.
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-fwnode.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h index ea7a8b247e19..031ebb069dcb 100644 --- a/include/media/v4l2-fwnode.h +++ b/include/media/v4l2-fwnode.h @@ -23,6 +23,7 @@ #include <linux/types.h> #include <media/v4l2-mediabus.h> +#include <media/v4l2-subdev.h> struct fwnode_handle; struct v4l2_async_notifier; @@ -360,4 +361,41 @@ int v4l2_async_notifier_parse_fwnode_endpoints_by_port( int v4l2_async_notifier_parse_fwnode_sensor_common( struct device *dev, struct v4l2_async_notifier *notifier); +/** + * v4l2_async_register_fwnode_subdev - registers a sub-device to the + * asynchronous sub-device framework + * and parses fwnode endpoints + * + * @sd: pointer to struct &v4l2_subdev + * @asd_struct_size: size of the driver's async sub-device struct, including + * sizeof(struct v4l2_async_subdev). 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. + * @ports: array of port id's to parse for fwnode endpoints. If NULL, will + * parse all ports owned by the sub-device. + * @num_ports: number of ports in @ports array. Ignored if @ports is NULL. + * @parse_endpoint: Driver's callback function called on each V4L2 fwnode + * endpoint. Optional. + * + * This function is just like v4l2_async_register_subdev() with the + * exception that calling it will also allocate a notifier for the + * sub-device, parse the sub-device's firmware node endpoints using + * v4l2_async_notifier_parse_fwnode_endpoints() or + * v4l2_async_notifier_parse_fwnode_endpoints_by_port(), and + * registers the sub-device notifier. The sub-device is similarly + * unregistered by calling v4l2_async_unregister_subdev(). + * + * While registered, the subdev module is marked as in-use. + * + * An error is returned if the module is no longer loaded on any attempts + * to register it. + */ +int v4l2_async_register_fwnode_subdev( + struct v4l2_subdev *sd, size_t asd_struct_size, + unsigned int *ports, unsigned int num_ports, + int (*parse_endpoint)(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd)); + #endif /* _V4L2_FWNODE_H */ |