drm/imx: imx-ldb: use of_graph_get_endpoint_by_regs helper

Instead of using of_graph_get_port_by_id() to get the port and then
of_get_child_by_name() to get the first endpoint, get to the endpoint
in a single step.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 18 insertions, 17 deletions

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index f506e8dd76cb..5f8f0bf45a62 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -558,7 +558,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
         for_each_child_of_node(np, child) {
                 struct imx_ldb_channel *channel;
                 struct device_node *ddc_node;
-                struct device_node *port;
+                struct device_node *ep;
 
                 ret = of_property_read_u32(child, "reg", &i);
                 if (ret || i < 0 || i > 1)
@@ -581,22 +581,23 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
                  * The output port is port@4 with an external 4-port mux or
                  * port@2 with the internal 2-port mux.
                  */
-                port = of_graph_get_port_by_id(child, imx_ldb->lvds_mux ? 4 : 2);
-                if (port) {
-                        struct device_node *endpoint, *remote;
-
-                        endpoint = of_get_child_by_name(port, "endpoint");
-                        if (endpoint) {
-                                remote = of_graph_get_remote_port_parent(endpoint);
-                                if (remote)
-                                        channel->panel = of_drm_find_panel(remote);
-                                else
-                                        return -EPROBE_DEFER;
-                                if (!channel->panel) {
-                                        dev_err(dev, "panel not found: %s\n",
-                                                remote->full_name);
-                                        return -EPROBE_DEFER;
-                                }
+                ep = of_graph_get_endpoint_by_regs(child,
+                                                   imx_ldb->lvds_mux ? 4 : 2,
+                                                   -1);
+                if (ep) {
+                        struct device_node *remote;
+
+                        remote = of_graph_get_remote_port_parent(ep);
+                        of_node_put(ep);
+                        if (remote)
+                                channel->panel = of_drm_find_panel(remote);
+                        else
+                                return -EPROBE_DEFER;
+                        of_node_put(remote);
+                        if (!channel->panel) {
+                                dev_err(dev, "panel not found: %s\n",
+                                        remote->full_name);
+                                return -EPROBE_DEFER;
                         }
                 }