[PATCH 4/8] drm/bridge: it66121: Add a helper function to get the next bridge

[Sui Jingfeng]

From: Sui Jingfeng <suijingf...@loongson.cn>

Group the code lines(which with the same functional) into one dedicated
function, which reduce the weight of it66121_probe() function. Just trivial
cleanuo, no functional change.

Signed-off-by: Sui Jingfeng <suijingf...@loongson.cn>
---
 drivers/gpu/drm/bridge/ite-it66121.c | 53 ++++++++++++++++++----------
 1 file changed, 34 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it66121.c 
b/drivers/gpu/drm/bridge/ite-it66121.c
index 0f78737adc83..7e473beefc79 100644
--- a/drivers/gpu/drm/bridge/ite-it66121.c
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -340,6 +340,37 @@ static int it66121_of_read_bus_width(struct device *dev, 
u32 *bus_width)
        return 0;
 }
 
+static int it66121_of_get_next_bridge(struct device *dev,
+                                     struct drm_bridge **next_bridge)
+{
+       struct device_node *np;
+       struct drm_bridge *bridge;
+
+       np = of_graph_get_remote_node(dev->of_node, 1, -1);
+       if (!np) {
+               dev_err(dev, "The endpoint is unconnected\n");
+               return -EINVAL;
+       }
+
+       if (!of_device_is_available(np)) {
+               of_node_put(np);
+               dev_err(dev, "The remote device is disabled\n");
+               return -ENODEV;
+       }
+
+       bridge = of_drm_find_bridge(np);
+       of_node_put(np);
+
+       if (!bridge) {
+               dev_dbg(dev, "Next bridge not found, deferring probe\n");
+               return -EPROBE_DEFER;
+       }
+
+       *next_bridge = bridge;
+
+       return 0;
+}
+
 static const struct regmap_range_cfg it66121_regmap_banks[] = {
        {
                .name = "it66121",
@@ -1531,7 +1562,6 @@ static const char * const it66121_supplies[] = {
 static int it66121_probe(struct i2c_client *client)
 {
        u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
-       struct device_node *ep;
        int ret;
        struct it66121_ctx *ctx;
        struct device *dev = &client->dev;
@@ -1553,24 +1583,9 @@ static int it66121_probe(struct i2c_client *client)
        if (ret)
                return ret;
 
-       ep = of_graph_get_remote_node(dev->of_node, 1, -1);
-       if (!ep) {
-               dev_err(dev, "The endpoint is unconnected\n");
-               return -EINVAL;
-       }
-
-       if (!of_device_is_available(ep)) {
-               of_node_put(ep);
-               dev_err(dev, "The remote device is disabled\n");
-               return -ENODEV;
-       }
-
-       ctx->next_bridge = of_drm_find_bridge(ep);
-       of_node_put(ep);
-       if (!ctx->next_bridge) {
-               dev_dbg(dev, "Next bridge not found, deferring probe\n");
-               return -EPROBE_DEFER;
-       }
+       ret = it66121_of_get_next_bridge(dev, &ctx->next_bridge);
+       if (ret)
+               return ret;
 
        i2c_set_clientdata(client, ctx);
        mutex_init(&ctx->lock);
-- 
2.34.1