@@ -2523,6 +2523,33 @@ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode)
return found;
}
+/**
+ * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector
+ * @connector: connector to report the event on
+ *
+ * On some hardware a hotplug event notification may come from outside the display
+ * driver / device. An example of this is some USB Type-C setups where the hardware
+ * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD
+ * status bit to the GPU's DP HPD pin.
+ *
+ * This function can be used to report these out-of-band events after obtaining
+ * a drm_connector reference through calling drm_connector_find_by_fwnode().
+ */
+void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode)
+{
+ struct drm_connector *connector;
+
+ connector = drm_connector_find_by_fwnode(connector_fwnode);
+ if (IS_ERR(connector))
+ return;
+
+ if (connector->funcs->oob_hotplug_event)
+ connector->funcs->oob_hotplug_event(connector);
+
+ drm_connector_put(connector);
+}
+EXPORT_SYMBOL(drm_connector_oob_hotplug_event);
+
/**
* DOC: Tile group
@@ -1079,6 +1079,14 @@ struct drm_connector_funcs {
*/
void (*atomic_print_state)(struct drm_printer *p,
const struct drm_connector_state *state);
+
+ /**
+ * @oob_hotplug_event:
+ *
+ * This will get called when a hotplug-event for a drm-connector
+ * has been received from a source outside the display driver / device.
+ */
+ void (*oob_hotplug_event)(struct drm_connector *connector);
};
/**
@@ -1661,6 +1669,7 @@ drm_connector_is_unregistered(struct drm_connector *connector)
DRM_CONNECTOR_UNREGISTERED;
}
+void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode);
const char *drm_get_connector_type_name(unsigned int connector_type);
const char *drm_get_connector_status_name(enum drm_connector_status status);
const char *drm_get_subpixel_order_name(enum subpixel_order order);
Add a new drm_connector_oob_hotplug_event() function and oob_hotplug_event drm_connector_funcs member. On some hardware a hotplug event notification may come from outside the display driver / device. An example of this is some USB Type-C setups where the hardware muxes the DisplayPort data and aux-lines but does not pass the altmode HPD status bit to the GPU's DP HPD pin. In cases like this the new drm_connector_oob_hotplug_event() function can be used to report these out-of-band events. Changes in v2: - Make drm_connector_oob_hotplug_event() take a fwnode as argument and have it call drm_connector_find_by_fwnode() internally. This allows making drm_connector_find_by_fwnode() a drm-internal function and avoids code outside the drm subsystem potentially holding on the a drm_connector reference for a longer period. Changes in v3: - Drop the data argument to the drm_connector_oob_hotplug_event function since it is not used atm. This can be re-added later when a use for it actually arises. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/gpu/drm/drm_connector.c | 27 +++++++++++++++++++++++++++ include/drm/drm_connector.h | 9 +++++++++ 2 files changed, 36 insertions(+)