[PATCH v4 3/8] v4l2-async: Add v4l2_async_notifier_add_fwnode_remote_subdev

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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@xxxxxxxxxxxxxxx>
---
 drivers/media/v4l2-core/v4l2-async.c | 23 +++++++++++++++++++++++
 include/media/v4l2-async.h           | 25 +++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 27d7ed3d5177..ac686125354a 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -609,6 +609,29 @@ 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,
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index b9141ffa188a..bee49ec80652 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -185,6 +185,31 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
 				      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.
  *
-- 
2.11.0




[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]

  Powered by Linux