ASoC: soc-component: add snd_soc_component_close()

Current ALSA SoC is directly using component->driver->ops->xxx,
thus, it is deep nested, and makes code difficult to read,
and is not good for encapsulation.
This patch adds new snd_soc_component_close() and use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87ef2d5rnr.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-component.h

@@ -341,5 +341,7 @@ int snd_soc_component_force_enable_pin_unlocked(
 /* component driver ops */
 int snd_soc_component_open(struct snd_soc_component *component,
 			   struct snd_pcm_substream *substream);
+int snd_soc_component_close(struct snd_soc_component *component,
+			    struct snd_pcm_substream *substream);
 
 #endif /* __SOC_COMPONENT_H */

sound/soc/soc-component.c

@@ -295,3 +295,13 @@ int snd_soc_component_open(struct snd_soc_component *component,
 
 	return 0;
 }
+
+int snd_soc_component_close(struct snd_soc_component *component,
+			    struct snd_pcm_substream *substream)
+{
+	if (component->driver->ops &&
+	    component->driver->ops->close)
+		return component->driver->ops->close(substream);
+
+	return 0;
+}

sound/soc/soc-pcm.c

@@ -465,6 +465,7 @@ static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_component *component;
+	int ret = 0;
 
 	for_each_rtdcom(rtd, rtdcom) {
 		component = rtdcom->component;
@@ -472,14 +473,11 @@ static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 		if (component == last)
 			break;
 
-		if (component->driver->ops &&
-		    component->driver->ops->close)
-			component->driver->ops->close(substream);
-
+		ret |= snd_soc_component_close(component, substream);
 		snd_soc_component_module_put_when_close(component);
 	}
 
-	return 0;
+	return ret;
 }
 
 /*