The patch adds the initial connector parsing code, so we can move from a
driver specific parsing code to a generic one. Currently only the
generic fields and the analog-connector specific fields are parsed. Parsing
the other connector specific fields can be added by a simple callbacks.
Signed-off-by: Marco Felsch <m.fel...@pengutronix.de>
---
drivers/media/v4l2-core/v4l2-fwnode.c | 113 ++++++++++++++++++++++++++
include/media/v4l2-fwnode.h | 16 ++++
2 files changed, 129 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c
b/drivers/media/v4l2-core/v4l2-fwnode.c
index 9bfedd7596a1..56f581e00197 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -592,6 +592,119 @@ void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link)
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_put_link);
+static const struct v4l2_fwnode_connector_conv {
+ enum v4l2_connector_type type;
+ const char *name;
+} connectors[] = {
+ {
+ .type = V4L2_CON_COMPOSITE,
+ .name = "composite-video-connector",
+ }, {
+ .type = V4L2_CON_SVIDEO,
+ .name = "svideo-connector",
+ }, {
+ .type = V4L2_CON_VGA,
+ .name = "vga-connector",
+ }, {
+ .type = V4L2_CON_DVI,
+ .name = "dvi-connector",
+ }, {
+ .type = V4L2_CON_HDMI,
+ .name = "hdmi-connector"
+ }
+};
+
+static enum v4l2_connector_type
+v4l2_fwnode_string_to_connector_type(const char *con_str)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(connectors); i++)
+ if (!strcmp(con_str, connectors[i].name))
+ return connectors[i].type;
+
+ /* no valid connector found */
+ return V4L2_CON_UNKNOWN;
+}
+
+static int
+v4l2_fwnode_connector_parse_analog(struct fwnode_handle *fwnode,
+ struct v4l2_fwnode_connector *vc)
+{
+ u32 tvnorms;
+ int ret;
+
+ ret = fwnode_property_read_u32(fwnode, "tvnorms", &tvnorms);
+
+ /* set it to V4L2_STD_ALL in case of not specified tvnorms */
+ vc->connector.analog.supported_tvnorms = ret ? V4L2_STD_ALL : tvnorms;
+ return 0;
+}
+
+int v4l2_fwnode_parse_connector(struct fwnode_handle *__fwnode,
+ struct v4l2_fwnode_connector *connector)
+{
+ struct fwnode_handle *fwnode;
+ struct fwnode_endpoint __ep;
+ const char *c_type_str, *label;
+ int ret;
+
+ memset(connector, 0, sizeof(*connector));
+
+ fwnode = fwnode_graph_get_remote_port_parent(__fwnode);
+
+ /* 1st parse all common properties */
+ /* connector-type is stored within the compatible string */
+ ret = fwnode_property_read_string(fwnode, "compatible", &c_type_str);
+ if (ret)
+ return -EINVAL;
+
+ connector->type = v4l2_fwnode_string_to_connector_type(c_type_str);
+
+ fwnode_graph_parse_endpoint(__fwnode, &__ep);
+ connector->remote_port = __ep.port;
+ connector->remote_id = __ep.id;
+
+ ret = fwnode_property_read_string(fwnode, "label", &label);
+ if (!ret) {
+ /* ensure label doesn't exceed V4L2_CONNECTOR_MAX_LABEL size */
+ strlcpy(connector->label, label, V4L2_CONNECTOR_MAX_LABEL);
+ } else {
+ /*
+ * labels are optional, if no one is given create one:
+ * <connector-type-string>@port<endpoint_port>/ep<endpoint_id>
+ */
+ snprintf(connector->label, V4L2_CONNECTOR_MAX_LABEL,
+ "%s@port%u/ep%u", c_type_str, connector->remote_port,
+ connector->remote_id);
+ }
+
+ /* now parse the connector specific properties */
+ switch (connector->type) {
+ /* fall through */
+ case V4L2_CON_COMPOSITE:
+ case V4L2_CON_SVIDEO:
+ ret = v4l2_fwnode_connector_parse_analog(fwnode, connector);
+ break;
+ /* fall through */
+ case V4L2_CON_VGA:
+ case V4L2_CON_DVI:
+ case V4L2_CON_HDMI:
+ pr_warn("Connector specific parsing is currently not supported
for %s\n",
+ c_type_str);
+ ret = 0;
+ break;
+ /* fall through */
+ case V4L2_CON_UNKNOWN:
+ default:
+ pr_err("Unknown connector type\n");
+ ret = -EINVAL;
+ };
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_parse_connector);
+
static int
v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev,
struct v4l2_async_notifier *notifier,
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index cf87e819800f..c00cb346b5eb 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -269,6 +269,22 @@ int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
*/
void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
+/**
+ * v4l2_fwnode_parse_connector() - parse the connector on endpoint
+ * @fwnode: pointer to the endpoint's fwnode handle where the connector is
+ * connected to.
+ * @connector: pointer to the V4L2 fwnode connector data structure
+ *
+ * Fill the connector data structure with the connector type, label and the
+ * endpoint id and port where the connector belongs to. If no label is present
+ * a unique one will be created. Labels with more than 40 characters are cut.
+ *
+ * Return: %0 on success or a negative error code on failure:
+ * %-EINVAL on parsing failure
+ */
+int v4l2_fwnode_parse_connector(struct fwnode_handle *fwnode,
+ struct v4l2_fwnode_connector *connector);
+
/**
* typedef parse_endpoint_func - Driver's callback function to be called on
* each V4L2 fwnode endpoint.
--
2.20.1
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