media: device property: Call fwnode_graph_get_endpoint_by_id() for fwnode->secondary

This function is used to find fwnode endpoints against a device. In
some instances those endpoints are software nodes which are children of
fwnode->secondary. Add support to fwnode_graph_get_endpoint_by_id() to
find those endpoints by recursively calling itself passing the ptr to
fwnode->secondary in the event no endpoint is found for the primary.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 0bf5260..1421e95 100644 (file)
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1215,7 +1215,14 @@ fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode,
                best_ep_id = fwnode_ep.id;
        }
 
-       return best_ep;
+       if (best_ep)
+               return best_ep;
+
+       if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary))
+               return fwnode_graph_get_endpoint_by_id(fwnode->secondary, port,
+                                                      endpoint, flags);
+
+       return NULL;
 }
 EXPORT_SYMBOL_GPL(fwnode_graph_get_endpoint_by_id);