drm/mediatek: mtk_hdmi: Move CEC device parsing in new function

Move the CEC device parsing logic to a new function called
mtk_hdmi_get_cec_dev(), and move the parsing action to the end
of mtk_hdmi_dt_parse_pdata(), allowing to remove gotos in this
function, reducing code size and improving readability.

Reviewed-by: CK Hu <[email protected]>
Signed-off-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -1357,14 +1357,10 @@ static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
 	.edid_read = mtk_hdmi_bridge_edid_read,
 };
 
-static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
-				   struct platform_device *pdev)
+static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
 {
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct device_node *cec_np, *remote, *i2c_np;
 	struct platform_device *cec_pdev;
-	struct regmap *regmap;
+	struct device_node *cec_np;
 	int ret;
 
 	ret = mtk_hdmi_get_all_clk(hdmi, np);
@@ -1384,62 +1380,66 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 		return -EPROBE_DEFER;
 	}
 	of_node_put(cec_np);
-	hdmi->cec_dev = &cec_pdev->dev;
 
 	/*
 	 * The mediatek,syscon-hdmi property contains a phandle link to the
 	 * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
 	 * registers it contains.
 	 */
-	regmap = syscon_regmap_lookup_by_phandle_args(np, "mediatek,syscon-hdmi",
-						      1, &hdmi->sys_offset);
-	if (IS_ERR(regmap)) {
-		ret = dev_err_probe(dev, PTR_ERR(regmap),
-				    "Failed to get system configuration registers\n");
-		goto put_device;
-	}
-	hdmi->sys_regmap = regmap;
+	hdmi->sys_regmap = syscon_regmap_lookup_by_phandle_args(np, "mediatek,syscon-hdmi",
+								1, &hdmi->sys_offset);
+	if (IS_ERR(hdmi->sys_regmap))
+		return dev_err_probe(dev, PTR_ERR(hdmi->sys_regmap),
+				     "Failed to get system configuration registers\n");
+
+	hdmi->cec_dev = &cec_pdev->dev;
+	return 0;
+}
+
+static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
+				   struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *remote, *i2c_np;
+	int ret;
+
+	ret = mtk_hdmi_get_all_clk(hdmi, np);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get clocks\n");
 
 	hdmi->regs = device_node_to_regmap(dev->of_node);
-	if (IS_ERR(hdmi->regs)) {
-		ret = PTR_ERR(hdmi->regs);
-		goto put_device;
-	}
+	if (IS_ERR(hdmi->regs))
+		return PTR_ERR(hdmi->regs);
 
 	remote = of_graph_get_remote_node(np, 1, 0);
-	if (!remote) {
-		ret = -EINVAL;
-		goto put_device;
-	}
+	if (!remote)
+		return -EINVAL;
 
 	if (!of_device_is_compatible(remote, "hdmi-connector")) {
 		hdmi->next_bridge = of_drm_find_bridge(remote);
 		if (!hdmi->next_bridge) {
 			dev_err(dev, "Waiting for external bridge\n");
 			of_node_put(remote);
-			ret = -EPROBE_DEFER;
-			goto put_device;
+			return -EPROBE_DEFER;
 		}
 	}
 
 	i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
 	of_node_put(remote);
-	if (!i2c_np) {
-		ret = dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
-		goto put_device;
-	}
+	if (!i2c_np)
+		return dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
 
 	hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
 	of_node_put(i2c_np);
-	if (!hdmi->ddc_adpt) {
-		ret = dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
-		goto put_device;
-	}
+	if (!hdmi->ddc_adpt)
+		return dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
+
+	ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
+	if (ret)
+		return ret;
 
 	return 0;
-put_device:
-	put_device(hdmi->cec_dev);
-	return ret;
 }
 
 /*