In order to properly identify connectors (in particular, DisplayPort
connectors wrapped into USB-C) allow bridge drivers to specify the value
to be used for connector's PATH property.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/drm_bridge_connector.c | 12 ++++++++++++
include/drm/drm_bridge.h | 7 +++++++
2 files changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index bf73960c2c2a..008d730e1c2f 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -331,6 +331,7 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
struct drm_connector *connector;
struct i2c_adapter *ddc = NULL;
struct drm_bridge *bridge, *panel_bridge = NULL;
+ const char *path = NULL;
int connector_type;
int ret;
@@ -377,6 +378,9 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
connector->fwnode = fwnode_handle_get(of_fwnode_handle(bridge->of_node));
#endif
+ if (bridge->path)
+ path = bridge->path;
+
if (bridge->ddc)
ddc = bridge->ddc;
@@ -405,6 +409,14 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
connector->polled = DRM_CONNECTOR_POLL_CONNECT
| DRM_CONNECTOR_POLL_DISCONNECT;
+ if (path) {
+ drm_object_attach_property(&connector->base,
+ drm->mode_config.path_property,
+ 0);
+
+ drm_connector_set_path_property(connector, path);
+ }
+
if (panel_bridge)
drm_panel_bridge_set_orientation(connector, panel_bridge);
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index c339fc85fd07..98e9d76474f4 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -753,6 +753,13 @@ struct drm_bridge {
* before the peripheral.
*/
bool pre_enable_prev_first;
+ /**
+ * @path: the 'path' of the bridge. For bridges at the end of this
+ * chain this is used to set the 'PATH' property of the connector.
+ * This string is not freed manually, so one either should use a static
+ * string here or a devres-allocated one.
+ */
+ const char *path;
/**
* @ddc: Associated I2C adapter for DDC access, if any.
*/
--
2.39.2
