libcamera: media_object: Set devnode in MediaEntity

The MediaEntity::setDeviceNode() function was designed to set the device
node path associated with a MediaEntity. The function was there, but the
devnode_ member field was never actually set. Fix this.

While at there add a getter method for the devnode_ member as it will
soon be used.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/src/libcamera/include/media_object.h b/src/libcamera/include/media_object.h
index a10f7e13..fad55a06 100644
--- a/src/libcamera/include/media_object.h
+++ b/src/libcamera/include/media_object.h
@@ -85,6 +85,7 @@ class MediaEntity : public MediaObject
 public:
 	const std::string &name() const { return name_; }
 	unsigned int function() const { return function_; }
+	const std::string &devnode() const { return devnode_; }
 	unsigned int deviceMajor() const { return major_; }
 	unsigned int deviceMinor() const { return minor_; }
 
diff --git a/src/libcamera/media_object.cpp b/src/libcamera/media_object.cpp
index 530db71d..7d075384 100644
--- a/src/libcamera/media_object.cpp
+++ b/src/libcamera/media_object.cpp
@@ -264,6 +264,15 @@ void MediaPad::addLink(MediaLink *link)
  */
 
 /**
+ * \fn MediaEntity::devnode()
+ * \brief Retrieve the entity's device node path, if any
+ *
+ * \sa int setDeviceNode()
+ *
+ * \return The entity's device node path, or an empty string if it is not set
+ */
+
+/**
  * \fn MediaEntity::deviceMajor()
  * \brief Retrieve the major number of the interface associated with the entity
  * \return The interface major number, or 0 if the entity isn't associated with
@@ -330,6 +339,8 @@ int MediaEntity::setDeviceNode(const std::string &devnode)
 		return ret;
 	}
 
+	devnode_ = devnode;
+
 	return 0;
 }