[PATCH v7 02/13] media: v4l2-fwnode: add v4l2_fwnode_connector

[Marco Felsch <m.felsch@pengutronix.de>]

Currently every driver needs to parse the connector endpoints by it self.
This is the initial work to make this generic. A generic connector has
common members and connector specific members. The common members are:
  - type
  - label (optional)
  - links
  - nr_of_links

The specific members are stored within a union, since only one of them
can be available at the time. Since this is the initial support the
patch adds only the analog-connector specific ones.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
[1] https://patchwork.kernel.org/cover/10794703/

v7:
- fix spelling issues
- constify label
- support variable label size
- replace single remote_port/id members by links member of variable
  size
- squash v4l2-connector into v4l2-fwnode

@Jacopo: I dropped your r b tag because I changed the port/id logic.

v6:
- fix some spelling and style issues
- rm unnecessary comments
- drop vga and dvi connector
- fix misspelt connector

v2-v4:
- nothing since the patch was squashed from series [1] into this
  series.
---
 include/media/v4l2-fwnode.h | 45 +++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index f6a7bcd13197..e39c198882fc 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -123,6 +123,51 @@ struct v4l2_fwnode_link {
 	unsigned int remote_port;
 };
 
+/**
+ * enum v4l2_connector_type - connector type
+ * @V4L2_CON_UNKNOWN:   unknown connector type, no V4L2 connector configuration
+ * @V4L2_CON_COMPOSITE: analog composite connector
+ * @V4L2_CON_SVIDEO:    analog svideo connector
+ * @V4L2_CON_HDMI:      digital hdmi connector
+ */
+enum v4l2_connector_type {
+	V4L2_CON_UNKNOWN,
+	V4L2_CON_COMPOSITE,
+	V4L2_CON_SVIDEO,
+	V4L2_CON_HDMI,
+};
+
+/**
+ * struct v4l2_fwnode_connector_analog - analog connector data structure
+ * @supported_tvnorms: tv norms this connector supports, set to V4L2_STD_ALL
+ *                     if no restrictions are specified.
+ */
+struct v4l2_fwnode_connector_analog {
+	v4l2_std_id supported_tvnorms;
+};
+
+/**
+ * struct v4l2_fwnode_connector - the connector data structure
+ * @label: optional connector label
+ * @type: connector type
+ * @links: list of &struct v4l2_fwnode_link links the connector is connected to
+ * @nr_of_links: total number of links
+ * @connector: connector configuration
+ * @connector.analog: analog connector configuration
+ *                    &struct v4l2_fwnode_connector_analog
+ */
+struct v4l2_fwnode_connector {
+	const char *label;
+	enum v4l2_connector_type type;
+	struct v4l2_fwnode_link *links;
+	unsigned int nr_of_links;
+
+	union {
+		struct v4l2_fwnode_connector_analog analog;
+		/* future connectors */
+	} connector;
+};
+
 /**
  * v4l2_fwnode_endpoint_parse() - parse all fwnode node properties
  * @fwnode: pointer to the endpoint's fwnode handle
-- 
2.20.1