[PATCH v3 3/3] v4l: fwnode: Support generic parsing of graph endpoints in a single port
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: 2017-08-18 11:23:17
Also in:
linux-media
Subsystem:
media input infrastructure (v4l/dvb), the rest, v4l2 async and fwnode frameworks · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds, Sakari Ailus
This is the preferred way to parse the endpoints. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- drivers/media/v4l2-core/v4l2-fwnode.c | 51 +++++++++++++++++++++++++++++++++++ include/media/v4l2-fwnode.h | 7 +++++ 2 files changed, 58 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index cb0fc4b4e3bf..961bcdf22d9a 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c@@ -508,6 +508,57 @@ int v4l2_fwnode_endpoints_parse( } EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoints_parse); +/** + * v4l2_fwnode_endpoint_parse - Parse V4L2 fwnode endpoints in a port node + * @dev: local struct device + * @notifier: async notifier related to @dev + * @port: port number + * @endpoint: endpoint number + * @asd_struct_size: size of the driver's async sub-device struct, including + * sizeof(struct v4l2_async_subdev) + * @parse_single: driver's callback function called on each V4L2 fwnode endpoint + * + * Parse all V4L2 fwnode endpoints related to a given port. This is + * the preferred interface over v4l2_fwnode_endpoints_parse() and + * should be used by new drivers. + */ +int v4l2_fwnode_endpoint_parse_port( + struct device *dev, struct v4l2_async_notifier *notifier, + unsigned int port, unsigned int endpoint, size_t asd_struct_size, + int (*parse_single)(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd)) +{ + struct fwnode_handle *fwnode; + struct v4l2_async_subdev *asd; + int ret; + + fwnode = fwnode_graph_get_remote_node(dev_fwnode(dev), port, endpoint); + if (!fwnode) + return -ENOENT; + + asd = devm_kzalloc(dev, asd_struct_size, GFP_KERNEL); + if (!asd) + return -ENOMEM; + + ret = notifier_realloc(dev, notifier, notifier->num_subdevs + 1); + if (ret) + goto out_free; + + ret = __v4l2_fwnode_endpoint_parse(dev, notifier, fwnode, asd, + parse_single); + if (ret) + goto out_free; + + return 0; + +out_free: + devm_kfree(dev, asd); + + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_parse_port); + MODULE_LICENSE("GPL"); MODULE_AUTHOR("Sakari Ailus <sakari.ailus@linux.intel.com>"); MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index c75a768d4ef7..5adf28e7b070 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h@@ -131,4 +131,11 @@ int v4l2_fwnode_endpoints_parse( struct v4l2_fwnode_endpoint *vep, struct v4l2_async_subdev *asd)); +int v4l2_fwnode_endpoint_parse_port( + struct device *dev, struct v4l2_async_notifier *notifier, + unsigned int port, unsigned int endpoint, size_t asd_struct_size, + int (*parse_single)(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd)); + #endif /* _V4L2_FWNODE_H */
--
2.11.0