2 files changed, 44 insertions, 33 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 06697b2d96b1..da11e44b01aa 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -447,16 +447,6 @@ static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
 		flush_delayed_work(&rtd->delayed_work);
 }
 
-static void codec2codec_close_delayed_work(struct work_struct *work)
-{
-	/*
-	 * Currently nothing to do for c2c links
-	 * Since c2c links are internal nodes in the DAPM graph and
-	 * don't interface with the outside world or application layer
-	 * we don't have to do any special handling on close.
-	 */
-}
-
 #ifdef CONFIG_PM_SLEEP
 /* powers down audio subsystem for suspend */
 int snd_soc_suspend(struct device *dev)
@@ -1555,27 +1545,19 @@ static int soc_probe_link_dais(struct snd_soc_card *card,
 		return ret;
 	}
 
-	if (!dai_link->params) {
-		/* create the pcm */
-		ret = soc_new_pcm(rtd, num);
-		if (ret < 0) {
-			dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
-				dai_link->stream_name, ret);
-			return ret;
-		}
-		ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
-		if (ret < 0)
-			return ret;
-		ret = soc_link_dai_pcm_new(rtd->codec_dais,
-					   rtd->num_codecs, rtd);
-		if (ret < 0)
-			return ret;
-	} else {
-		INIT_DELAYED_WORK(&rtd->delayed_work,
-				  codec2codec_close_delayed_work);
+	/* create the pcm */
+	ret = soc_new_pcm(rtd, num);
+	if (ret < 0) {
+		dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
+			dai_link->stream_name, ret);
+		return ret;
 	}
-
-	return 0;
+	ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
+	if (ret < 0)
+		return ret;
+	ret = soc_link_dai_pcm_new(rtd->codec_dais,
+				   rtd->num_codecs, rtd);
+	return ret;
 }
 
 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index fabeac164a6c..30264bc592f6 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -678,6 +678,16 @@ static void close_delayed_work(struct work_struct *work)
 	mutex_unlock(&rtd->pcm_mutex);
 }
 
+static void codec2codec_close_delayed_work(struct work_struct *work)
+{
+	/*
+	 * Currently nothing to do for c2c links
+	 * Since c2c links are internal nodes in the DAPM graph and
+	 * don't interface with the outside world or application layer
+	 * we don't have to do any special handling on close.
+	 */
+}
+
 /*
  * Called by ALSA when a PCM substream is closed. Private data can be
  * freed here. The cpu DAI, codec DAI, machine and components are also
@@ -3011,6 +3021,12 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 		playback = rtd->dai_link->dpcm_playback;
 		capture = rtd->dai_link->dpcm_capture;
 	} else {
+		/* Adapt stream for codec2codec links */
+		struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
+			&cpu_dai->driver->playback : &cpu_dai->driver->capture;
+		struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
+			&cpu_dai->driver->capture : &cpu_dai->driver->playback;
+
 		for_each_rtd_codec_dai(rtd, i, codec_dai) {
 			if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
 			    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
@@ -3019,6 +3035,9 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 			    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
 				capture = 1;
 		}
+
+		capture = capture && cpu_capture->channels_min;
+		playback = playback && cpu_playback->channels_min;
 	}
 
 	if (rtd->dai_link->playback_only) {
@@ -3032,7 +3051,13 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 	}
 
 	/* create the PCM */
-	if (rtd->dai_link->no_pcm) {
+	if (rtd->dai_link->params) {
+		snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
+			 rtd->dai_link->stream_name);
+
+		ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
+					   playback, capture, &pcm);
+	} else if (rtd->dai_link->no_pcm) {
 		snprintf(new_name, sizeof(new_name), "(%s)",
 			rtd->dai_link->stream_name);
 
@@ -3059,13 +3084,17 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 	dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
 
 	/* DAPM dai link stream work */
-	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
+	if (rtd->dai_link->params)
+		INIT_DELAYED_WORK(&rtd->delayed_work,
+				  codec2codec_close_delayed_work);
+	else
+		INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 
 	pcm->nonatomic = rtd->dai_link->nonatomic;
 	rtd->pcm = pcm;
 	pcm->private_data = rtd;
 
-	if (rtd->dai_link->no_pcm) {
+	if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
 		if (playback)
 			pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
 		if (capture)