ASoC: soc-component: add snd_soc_pcm_component_pcm_new()

Current ALSA SoC is directly using component->driver->xxx,
thus, the code nested deeply, and it makes code difficult to read,
and is not good for encapsulation.

We want to implement component related function at soc-component.c,
but, some of them need to care whole snd_soc_pcm_runtime (= rtd)
connected component.

Let's call component related function which need to care with
for_each_rtdcom() loop as snd_soc_pcm_component_xxx().
This patch adds new snd_soc_pcm_component_pcm() and use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87lfwl4czy.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-component.h

@@ -381,5 +381,6 @@ struct page *snd_soc_pcm_component_page(struct snd_pcm_substream *substream,
 					unsigned long offset);
 int snd_soc_pcm_component_mmap(struct snd_pcm_substream *substream,
 			       struct vm_area_struct *vma);
+int snd_soc_pcm_component_new(struct snd_pcm *pcm);
 
 #endif /* __SOC_COMPONENT_H */

sound/soc/soc-component.c

@@ -525,3 +525,23 @@ int snd_soc_pcm_component_mmap(struct snd_pcm_substream *substream,
 
 	return -EINVAL;
 }
+
+int snd_soc_pcm_component_new(struct snd_pcm *pcm)
+{
+	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_component *component;
+	int ret;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (component->driver->pcm_new) {
+			ret = component->driver->pcm_new(rtd);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	return 0;
+}

sound/soc/soc-pcm.c

@@ -2823,7 +2823,6 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 {
 	struct snd_soc_dai *codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_pcm *pcm;
 	char new_name[64];
@@ -2956,19 +2955,10 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 	if (capture)
 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
 
-	for_each_rtdcom(rtd, rtdcom) {
-		component = rtdcom->component;
-
-		if (!component->driver->pcm_new)
-			continue;
-
-		ret = component->driver->pcm_new(rtd);
-		if (ret < 0) {
-			dev_err(component->dev,
-				"ASoC: pcm constructor failed: %d\n",
-				ret);
-			return ret;
-		}
+	ret = snd_soc_pcm_component_new(pcm);
+	if (ret < 0) {
+		dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
+		return ret;
 	}
 
 	pcm->private_free = soc_pcm_private_free;