libcamera: media_device: Add hwRevision method

Add a method 'hwRevision' to return the
info.hw_version reported by the driver.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/internal/media_device.h

@@ -41,6 +41,7 @@ public:
 	const std::string deviceNode() const { return deviceNode_; }
 	const std::string model() const { return model_; }
 	unsigned int version() const { return version_; }
+	unsigned int hwRevision() const { return hwRevision_; }
 
 	const std::vector<MediaEntity *> &entities() const { return entities_; }
 	MediaEntity *getEntityByName(const std::string &name) const;
@@ -79,6 +80,7 @@ private:
 	std::string deviceNode_;
 	std::string model_;
 	unsigned int version_;
+	unsigned int hwRevision_;
 
 	int fd_;
 	bool valid_;

src/libcamera/media_device.cpp

@@ -231,6 +231,7 @@ int MediaDevice::populate()
 	driver_ = info.driver;
 	model_ = info.model;
 	version_ = info.media_version;
+	hwRevision_ = info.hw_revision;
 
 	/*
 	 * Keep calling G_TOPOLOGY until the version number stays stable.
@@ -323,6 +324,15 @@ done:
  * \return The MediaDevice API version
  */
 
+/**
+ * \fn MediaDevice::hwRevision()
+ * \brief Retrieve the media device hardware revision
+ *
+ * The hardware revision is in a driver-specific format.
+ *
+ * \return The MediaDevice hardware revision
+ */
+
 /**
  * \fn MediaDevice::entities()
  * \brief Retrieve the list of entities in the media graph