ASoC: soc-dai: add snd_soc_dai_delay()

Current ALSA SoC is directly using dai->driver->ops->xxx,
thus, it has deep nested bracket, and it makes code unreadable.
This patch adds new snd_soc_dai_delay() and use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87o91mhn3i.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dai.h

@@ -160,6 +160,8 @@ int snd_soc_dai_trigger(struct snd_soc_dai *dai,
 			struct snd_pcm_substream *substream, int cmd);
 int snd_soc_dai_bespoke_trigger(struct snd_soc_dai *dai,
 			struct snd_pcm_substream *substream, int cmd);
+snd_pcm_sframes_t snd_soc_dai_delay(struct snd_soc_dai *dai,
+				    struct snd_pcm_substream *substream);
 
 struct snd_soc_dai_ops {
 	/*

sound/soc/soc-dai.c

@@ -342,3 +342,14 @@ int snd_soc_dai_bespoke_trigger(struct snd_soc_dai *dai,
 
 	return ret;
 }
+
+snd_pcm_sframes_t snd_soc_dai_delay(struct snd_soc_dai *dai,
+				    struct snd_pcm_substream *substream)
+{
+	int delay = 0;
+
+	if (dai->driver->ops->delay)
+		delay = dai->driver->ops->delay(substream, dai);
+
+	return delay;
+}

sound/soc/soc-pcm.c

@@ -1169,14 +1169,11 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 	/* base delay if assigned in pointer callback */
 	delay = runtime->delay;
 
-	if (cpu_dai->driver->ops->delay)
-		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
+	delay += snd_soc_dai_delay(cpu_dai, substream);
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
-		if (codec_dai->driver->ops->delay)
-			codec_delay = max(codec_delay,
-					codec_dai->driver->ops->delay(substream,
-								    codec_dai));
+		codec_delay = max(codec_delay,
+				  snd_soc_dai_delay(codec_dai, substream));
 	}
 	delay += codec_delay;