From 9ca4653121329595443df4e7a458154e8f745edf Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Thu, 17 Aug 2017 11:28:21 -0400 Subject: media: v4l: fwnode: Support generic parsing of graph endpoints in a device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add two functions for parsing devices graph endpoints: v4l2_async_notifier_parse_fwnode_endpoints and v4l2_async_notifier_parse_fwnode_endpoints_by_port. The former iterates over all endpoints whereas the latter only iterates over the endpoints in a given port. The former is mostly useful for existing drivers that currently implement the iteration over all the endpoints themselves whereas the latter is especially intended for devices with both sinks and sources: async sub-devices for external devices connected to the device's sources will have already been set up, or the external sub-devices are part of the master device. Depends-on: ("device property: preserve usecount for node passed to of_fwnode_graph_get_port_parent()") Signed-off-by: Sakari Ailus Acked-by: Hans Verkuil Acked-by: Niklas Söderlund Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/v4l2-async.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'drivers/media/v4l2-core/v4l2-async.c') diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 8b84fea50c2a..46aebfc75e43 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -22,6 +22,7 @@ #include #include +#include #include static bool match_i2c(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd) @@ -237,6 +238,36 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier) } EXPORT_SYMBOL(v4l2_async_notifier_unregister); +void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier) +{ + unsigned int i; + + if (!notifier->max_subdevs) + return; + + for (i = 0; i < notifier->num_subdevs; i++) { + struct v4l2_async_subdev *asd = notifier->subdevs[i]; + + switch (asd->match_type) { + case V4L2_ASYNC_MATCH_FWNODE: + fwnode_handle_put(asd->match.fwnode.fwnode); + break; + default: + WARN_ON_ONCE(true); + break; + } + + kfree(asd); + } + + notifier->max_subdevs = 0; + notifier->num_subdevs = 0; + + kvfree(notifier->subdevs); + notifier->subdevs = NULL; +} +EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup); + int v4l2_async_register_subdev(struct v4l2_subdev *sd) { struct v4l2_async_notifier *notifier; -- cgit v1.2.3