drm/exynos: mic: add a bridge at probe

This patch moves drm_bridge_add call into probe.

It doesn't need to call drm_bridge_add call every time
bind callback is called.

Changelog v2
- moved drm_bridge_remove call into remove callback.
- corrected description.
Suggested-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_mic.c

@@ -340,16 +340,10 @@ static int exynos_mic_bind(struct device *dev, struct device *master,
 			   void *data)
 {
 	struct exynos_mic *mic = dev_get_drvdata(dev);
-	int ret;
 
-	mic->bridge.funcs = &mic_bridge_funcs;
-	mic->bridge.of_node = dev->of_node;
 	mic->bridge.driver_private = mic;
-	ret = drm_bridge_add(&mic->bridge);
-	if (ret)
-		DRM_ERROR("mic: Failed to add MIC to the global bridge list\n");
 
-	return ret;
+	return 0;
 }
 
 static void exynos_mic_unbind(struct device *dev, struct device *master,
@@ -365,8 +359,6 @@ static void exynos_mic_unbind(struct device *dev, struct device *master,
 
 already_disabled:
 	mutex_unlock(&mic_mutex);
-
-	drm_bridge_remove(&mic->bridge);
 }
 
 static const struct component_ops exynos_mic_component_ops = {
@@ -461,6 +453,15 @@ static int exynos_mic_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, mic);
 
+	mic->bridge.funcs = &mic_bridge_funcs;
+	mic->bridge.of_node = dev->of_node;
+
+	ret = drm_bridge_add(&mic->bridge);
+	if (ret) {
+		DRM_ERROR("mic: Failed to add MIC to the global bridge list\n");
+		return ret;
+	}
+
 	pm_runtime_enable(dev);
 
 	ret = component_add(dev, &exynos_mic_component_ops);
@@ -479,8 +480,13 @@ static int exynos_mic_probe(struct platform_device *pdev)
 
 static int exynos_mic_remove(struct platform_device *pdev)
 {
+	struct exynos_mic *mic = platform_get_drvdata(pdev);
+
 	component_del(&pdev->dev, &exynos_mic_component_ops);
 	pm_runtime_disable(&pdev->dev);
+
+	drm_bridge_remove(&mic->bridge);
+
 	return 0;
 }