[alsa-devel] [RFC 3/6] ASoC: core: add code to complete dai init after pcm creation

[Arnaud Pouliquen]

Some Controls defined in DAI need to be associated to PCM device (e.g. IEC60958).

This allows to perform post initialization in DAI after PCM device creation.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
---
 include/sound/soc-dai.h |  7 +++++++
 sound/soc/soc-core.c    | 14 ++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 964b7de..6969c83 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -205,6 +205,13 @@ struct snd_soc_dai_ops {
 	 */
 	snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
 		struct snd_soc_dai *);
+
+	/*
+	 * function called by soc_probe_link_dais to post initialize DAI
+	 * after pcm device creation.
+	 * As example, can be used to link a controls to the pcm device
+	 */
+	int (*pcm_new)(struct snd_soc_pcm_runtime *, struct snd_soc_dai *);
 };
 
 /*
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 790ee2b..50f3f82 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1587,6 +1587,7 @@ static int soc_probe_link_dais(struct snd_soc_card *card,
 {
 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	const struct snd_soc_dai_ops *ops;
 	int i, ret;
 
 	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
@@ -1662,6 +1663,19 @@ static int soc_probe_link_dais(struct snd_soc_card *card,
 		}
 	}
 
+	for (i = 0; i < rtd->num_codecs; i++) {
+		ops = rtd->codec_dais[i]->driver->ops;
+		if (ops->pcm_new)
+			ret = ops->pcm_new(rtd, rtd->codec_dais[i]);
+		if (ret)
+			return ret;
+	}
+	ops = cpu_dai->driver->ops;
+	if (ops->pcm_new)
+			ret = ops->pcm_new(rtd, rtd->codec_dais[i]);
+	if (ret)
+		return ret;
+
 	return 0;
 }
 
-- 
1.9.1