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authorJacopo Mondi <jacopo@jmondi.org>2020-05-09 11:04:49 +0200
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-05-18 15:34:56 +0200
commit344897ef1d9b33e246b64e255d807ca6c053f349 (patch)
treedc2be999c92c119c38072b83888bab6c1832f941 /include/media
parent926645d43fd43622a2b056471a2cf41cc19cbf4c (diff)
media: v4l2-fwnode: Add helper to parse device properties
Add an helper function to parse common device properties in the same way as v4l2_fwnode_endpoint_parse() parses common endpoint properties. Parse the 'rotation' and 'orientation' properties from the firmware interface. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/v4l2-fwnode.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index fad7a6480bf9..c47b70636e42 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -109,6 +109,36 @@ struct v4l2_fwnode_endpoint {
};
/**
+ * V4L2_FWNODE_PROPERTY_UNSET - identify a non initialized property
+ *
+ * All properties in &struct v4l2_fwnode_device_properties are initialized
+ * to this value.
+ */
+#define V4L2_FWNODE_PROPERTY_UNSET (-1U)
+
+/**
+ * enum v4l2_fwnode_orientation - possible device orientation
+ * @V4L2_FWNODE_ORIENTATION_FRONT: device installed on the front side
+ * @V4L2_FWNODE_ORIENTATION_BACK: device installed on the back side
+ * @V4L2_FWNODE_ORIENTATION_EXTERNAL: device externally located
+ */
+enum v4l2_fwnode_orientation {
+ V4L2_FWNODE_ORIENTATION_FRONT,
+ V4L2_FWNODE_ORIENTATION_BACK,
+ V4L2_FWNODE_ORIENTATION_EXTERNAL
+};
+
+/**
+ * struct v4l2_fwnode_device_properties - fwnode device properties
+ * @orientation: device orientation. See &enum v4l2_fwnode_orientation
+ * @rotation: device rotation
+ */
+struct v4l2_fwnode_device_properties {
+ enum v4l2_fwnode_orientation orientation;
+ unsigned int rotation;
+};
+
+/**
* struct v4l2_fwnode_link - a link between two endpoints
* @local_node: pointer to device_node of this endpoint
* @local_port: identifier of the port this endpoint belongs to
@@ -354,6 +384,23 @@ int v4l2_fwnode_connector_add_link(struct fwnode_handle *fwnode,
struct v4l2_fwnode_connector *connector);
/**
+ * v4l2_fwnode_device_parse() - parse fwnode device properties
+ * @dev: pointer to &struct device
+ * @props: pointer to &struct v4l2_fwnode_device_properties where to store the
+ * parsed properties values
+ *
+ * This function parses and validates the V4L2 fwnode device properties from the
+ * firmware interface, and fills the @struct v4l2_fwnode_device_properties
+ * provided by the caller.
+ *
+ * Return:
+ * % 0 on success
+ * %-EINVAL if a parsed property value is not valid
+ */
+int v4l2_fwnode_device_parse(struct device *dev,
+ struct v4l2_fwnode_device_properties *props);
+
+/**
* typedef parse_endpoint_func - Driver's callback function to be called on
* each V4L2 fwnode endpoint.
*