[alsa-devel] [PATCH RFC v3 0/4] ASoC: Add Multi CPU DAI support

[alsa-devel] [PATCH RFC v3 0/4] ASoC: Add Multi CPU DAI support

[Bard liao]

As discussed in [1], ASoC core supports multi codec DAIs
on a DAI link. However it does not do so for CPU DAIs.

So, add support for multi CPU DAIs on a DAI Link by adding
multi CPU DAI in Card instantiation, suspend and resume
functions, PCM ops, stream handling functions and DAPM.

[1]: https://www.spinics.net/lists/alsa-devel/msg71369.html

changes in v3:
 - Return error if the function doesn't support multi cpu instead of
   just showing a warning message.
 - Revert changes for FE dai and compress device since we don't support
   multi cpu for FE dai and compress device yet.

Bard liao (1):
  ASoC: return error if the function is not support multi cpu yet.

Shreyas NC (3):
  ASoC: Add initial support for multiple CPU DAIs
  ASoC: Add multiple CPU DAI support for PCM ops
  ASoC: Add multiple CPU DAI support in DAPM

 include/sound/soc.h                   |  15 +
 sound/soc/soc-compress.c              |   5 +-
 sound/soc/soc-core.c                  | 205 +++++-----
 sound/soc/soc-dapm.c                  | 131 ++++---
 sound/soc/soc-generic-dmaengine-pcm.c |  18 +
 sound/soc/soc-pcm.c                   | 539 +++++++++++++++++---------
 6 files changed, 591 insertions(+), 322 deletions(-)

-- 
2.17.1

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[alsa-devel] [PATCH RFC v3 1/4] ASoC: Add initial support for multiple CPU DAIs

[Bard liao]

From: Shreyas NC <shreyas.nc@intel.com>

ASoC core supports multiple codec DAIs but supports only a CPU DAI.
To support multiple cpu DAIs, add cpu_dai and num_cpu_dai in
snd_soc_dai_link and snd_soc_pcm_runtime structures similar to
support for codec_dai. This is intended as a preparatory patch to
eventually support the unification of the Codec and CPU DAI.

Inline with multiple codec DAI approach, add support to allocate,
init, bind and probe multiple cpu_dai on init if driver specifies
that. Also add support to loop over multiple cpu_dai during
suspend and resume.

This is intended as a preparatory patch to eventually unify the CPU
and Codec DAI into DAI components.

Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 include/sound/soc.h  |  15 ++++
 sound/soc/soc-core.c | 205 ++++++++++++++++++++++++-------------------
 2 files changed, 129 insertions(+), 91 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index f0e4f36f83bf..4163f5e06126 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -855,6 +855,11 @@ struct snd_soc_dai_link {
 	     ((platform) = &link->platforms[i]);			\
 	     (i)++)
 
+#define for_each_link_cpus(link, i, cpu)				\
+	for ((i) = 0;							\
+	     ((i) < link->num_cpus) && ((cpu) = &link->cpus[i]);	\
+	     (i)++)
+
 /*
  * Sample 1 : Single CPU/Codec/Platform
  *
@@ -1132,6 +1137,9 @@ struct snd_soc_pcm_runtime {
 	struct snd_soc_dai **codec_dais;
 	unsigned int num_codecs;
 
+	struct snd_soc_dai **cpu_dais;
+	unsigned int num_cpus;
+
 	struct delayed_work delayed_work;
 	void (*close_delayed_work_func)(struct snd_soc_pcm_runtime *rtd);
 #ifdef CONFIG_DEBUG_FS
@@ -1159,6 +1167,13 @@ struct snd_soc_pcm_runtime {
 #define for_each_rtd_codec_dai_rollback(rtd, i, dai)		\
 	for (; ((--i) >= 0) && ((dai) = rtd->codec_dais[i]);)
 
+#define for_each_rtd_cpu_dai(rtd, i, dai)\
+	for ((i) = 0;						       \
+	     ((i) < rtd->num_cpus) && ((dai) = rtd->cpu_dais[i]); \
+	     (i)++)
+#define for_each_rtd_cpu_dai_rollback(rtd, i, dai)		\
+	for (; ((--i) >= 0) && ((dai) = rtd->cpu_dais[i]);)
+
 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd);
 
 /* mixer control */
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index acf6f141fd2d..ac3d1650c913 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -483,6 +483,14 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
 	if (!rtd->codec_dais)
 		goto free_rtd;
 
+	/*
+	 * for rtd->cpu_dais
+	 */
+	rtd->cpu_dais = devm_kcalloc(dev, dai_link->num_cpus,
+				     sizeof(struct snd_soc_dai *),
+				     GFP_KERNEL);
+	if (!rtd->cpu_dais)
+		goto free_rtd;
 	/*
 	 * rtd remaining settings
 	 */
@@ -559,13 +567,15 @@ int snd_soc_suspend(struct device *dev)
 		card->suspend_pre(card);
 
 	for_each_card_rtds(card, rtd) {
-		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *cpu_dai;
 
 		if (rtd->dai_link->ignore_suspend)
 			continue;
 
-		if (!cpu_dai->driver->bus_control)
-			snd_soc_dai_suspend(cpu_dai);
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (!cpu_dai->driver->bus_control)
+				snd_soc_dai_suspend(cpu_dai);
+		}
 	}
 
 	/* close any waiting streams */
@@ -640,13 +650,14 @@ int snd_soc_suspend(struct device *dev)
 	}
 
 	for_each_card_rtds(card, rtd) {
-		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *cpu_dai;
 
 		if (rtd->dai_link->ignore_suspend)
 			continue;
 
-		if (cpu_dai->driver->bus_control)
-			snd_soc_dai_suspend(cpu_dai);
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			if (cpu_dai->driver->bus_control)
+				snd_soc_dai_suspend(cpu_dai);
 	}
 
 	if (card->suspend_post)
@@ -684,13 +695,15 @@ static void soc_resume_deferred(struct work_struct *work)
 
 	/* resume control bus DAIs */
 	for_each_card_rtds(card, rtd) {
-		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *cpu_dai;
 
 		if (rtd->dai_link->ignore_suspend)
 			continue;
 
-		if (cpu_dai->driver->bus_control)
-			snd_soc_dai_resume(cpu_dai);
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->driver->bus_control)
+				snd_soc_dai_resume(cpu_dai);
+		}
 	}
 
 	for_each_card_components(card, component) {
@@ -727,13 +740,15 @@ static void soc_resume_deferred(struct work_struct *work)
 	}
 
 	for_each_card_rtds(card, rtd) {
-		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *cpu_dai;
 
 		if (rtd->dai_link->ignore_suspend)
 			continue;
 
-		if (!cpu_dai->driver->bus_control)
-			snd_soc_dai_resume(cpu_dai);
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (!cpu_dai->driver->bus_control)
+				snd_soc_dai_resume(cpu_dai);
+		}
 	}
 
 	if (card->resume_post)
@@ -773,9 +788,11 @@ int snd_soc_resume(struct device *dev)
 	 * due to I/O costs and anti-pop so handle them out of line.
 	 */
 	for_each_card_rtds(card, rtd) {
-		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *cpu_dai;
+		int i;
 
-		bus_control |= cpu_dai->driver->bus_control;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			bus_control |= cpu_dai->driver->bus_control;
 	}
 	if (bus_control) {
 		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
@@ -900,7 +917,7 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 				     struct snd_soc_dai_link *link)
 {
 	int i;
-	struct snd_soc_dai_link_component *codec, *platform;
+	struct snd_soc_dai_link_component *cpu, *codec, *platform;
 
 	for_each_link_codecs(link, i, codec) {
 		/*
@@ -949,44 +966,38 @@ static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 			return -EPROBE_DEFER;
 	}
 
-	/* FIXME */
-	if (link->num_cpus > 1) {
-		dev_err(card->dev,
-			"ASoC: multi cpu is not yet supported %s\n",
-			link->name);
-		return -EINVAL;
-	}
-
-	/*
-	 * CPU device may be specified by either name or OF node, but
-	 * can be left unspecified, and will be matched based on DAI
-	 * name alone..
-	 */
-	if (link->cpus->name && link->cpus->of_node) {
-		dev_err(card->dev,
-			"ASoC: Neither/both cpu name/of_node are set for %s\n",
-			link->name);
-		return -EINVAL;
-	}
+	for_each_link_cpus(link, i, cpu) {
+		/*
+		 * CPU device may be specified by either name or OF node, but
+		 * can be left unspecified, and will be matched based on DAI
+		 * name alone..
+		 */
+		if (cpu->name && cpu->of_node) {
+			dev_err(card->dev,
+				"ASoC: Neither/both cpu name/of_node are set for %s\n",
+				link->name);
+			return -EINVAL;
+		}
 
-	/*
-	 * Defer card registration if cpu dai component is not added to
-	 * component list.
-	 */
-	if ((link->cpus->of_node || link->cpus->name) &&
-	    !soc_find_component(link->cpus))
-		return -EPROBE_DEFER;
+		/*
+		 * Defer card registration if cpu dai component is not added to
+		 * component list.
+		 */
+		if ((cpu->of_node || cpu->name) &&
+		    !soc_find_component(cpu))
+			return -EPROBE_DEFER;
 
-	/*
-	 * At least one of CPU DAI name or CPU device name/node must be
-	 * specified
-	 */
-	if (!link->cpus->dai_name &&
-	    !(link->cpus->name || link->cpus->of_node)) {
-		dev_err(card->dev,
-			"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
-			link->name);
-		return -EINVAL;
+		/*
+		 * At least one of CPU DAI name or CPU device name/node must be
+		 * specified
+		 */
+		if (!cpu->dai_name &&
+		    !(cpu->name || cpu->of_node)) {
+			dev_err(card->dev,
+				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
+				link->name);
+			return -EINVAL;
+		}
 	}
 
 	return 0;
@@ -1029,7 +1040,7 @@ int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
 			    struct snd_soc_dai_link *dai_link)
 {
 	struct snd_soc_pcm_runtime *rtd;
-	struct snd_soc_dai_link_component *codec, *platform;
+	struct snd_soc_dai_link_component *codec, *platform, *cpu;
 	struct snd_soc_component *component;
 	int i, ret;
 
@@ -1054,14 +1065,19 @@ int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
 	if (!rtd)
 		return -ENOMEM;
 
-	/* FIXME: we need multi CPU support in the future */
-	rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
-	if (!rtd->cpu_dai) {
-		dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
-			 dai_link->cpus->dai_name);
-		goto _err_defer;
+	rtd->num_cpus = dai_link->num_cpus;
+	for_each_link_cpus(dai_link, i, cpu) {
+		rtd->cpu_dais[i] = snd_soc_find_dai(cpu);
+		if (!rtd->cpu_dais[i]) {
+			dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
+				 cpu->dai_name);
+			goto _err_defer;
+		}
+		snd_soc_rtd_add_component(rtd, rtd->cpu_dais[i]->component);
 	}
-	snd_soc_rtd_add_component(rtd, rtd->cpu_dai->component);
+
+	/* Single cpu links expect cpu and cpu_dai in runtime data */
+	rtd->cpu_dai = rtd->cpu_dais[0];
 
 	/* Find CODEC from registered CODECs */
 	rtd->num_codecs = dai_link->num_codecs;
@@ -1181,7 +1197,8 @@ static int soc_init_pcm_runtime(struct snd_soc_card *card,
 			dai_link->stream_name, ret);
 		return ret;
 	}
-	ret = soc_dai_pcm_new(&cpu_dai, 1, rtd);
+	ret = soc_dai_pcm_new(rtd->cpu_dais,
+			      rtd->num_cpus, rtd);
 	if (ret < 0)
 		return ret;
 	ret = soc_dai_pcm_new(rtd->codec_dais,
@@ -1373,6 +1390,7 @@ static void soc_remove_link_dais(struct snd_soc_card *card)
 {
 	int i;
 	struct snd_soc_dai *codec_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_pcm_runtime *rtd;
 	int order;
 
@@ -1382,14 +1400,15 @@ static void soc_remove_link_dais(struct snd_soc_card *card)
 			for_each_rtd_codec_dai(rtd, i, codec_dai)
 				soc_remove_dai(codec_dai, order);
 
-			soc_remove_dai(rtd->cpu_dai, order);
+			for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+				soc_remove_dai(cpu_dai, order);
 		}
 	}
 }
 
 static int soc_probe_link_dais(struct snd_soc_card *card)
 {
-	struct snd_soc_dai *codec_dai;
+	struct snd_soc_dai *codec_dai, *cpu_dai;
 	struct snd_soc_pcm_runtime *rtd;
 	int i, order, ret;
 
@@ -1400,9 +1419,12 @@ static int soc_probe_link_dais(struct snd_soc_card *card)
 				"ASoC: probe %s dai link %d late %d\n",
 				card->name, rtd->num, order);
 
-			ret = soc_probe_dai(rtd->cpu_dai, order);
-			if (ret)
-				return ret;
+			/* probe the CPU DAI */
+			for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+				ret = soc_probe_dai(cpu_dai, order);
+				if (ret)
+					return ret;
+			}
 
 			/* probe the CODEC DAI */
 			for_each_rtd_codec_dai(rtd, i, codec_dai) {
@@ -1534,8 +1556,9 @@ static void soc_remove_aux_devices(struct snd_soc_card *card)
 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
 	unsigned int dai_fmt)
 {
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
+	unsigned int inv_dai_fmt;
 	unsigned int i;
 	int ret;
 
@@ -1552,33 +1575,33 @@ int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
 	 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
 	 * the component which has non_legacy_dai_naming is Codec
 	 */
-	if (cpu_dai->component->driver->non_legacy_dai_naming) {
-		unsigned int inv_dai_fmt;
-
-		inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
-		switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
-		case SND_SOC_DAIFMT_CBM_CFM:
-			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
-			break;
-		case SND_SOC_DAIFMT_CBM_CFS:
-			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
-			break;
-		case SND_SOC_DAIFMT_CBS_CFM:
-			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
-			break;
-		case SND_SOC_DAIFMT_CBS_CFS:
-			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
-			break;
-		}
-
-		dai_fmt = inv_dai_fmt;
+	inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
+	switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+		inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+		break;
 	}
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		unsigned int fmt = dai_fmt;
 
-	ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
-	if (ret != 0 && ret != -ENOTSUPP) {
-		dev_warn(cpu_dai->dev,
-			 "ASoC: Failed to set DAI format: %d\n", ret);
-		return ret;
+		if (cpu_dai->component->driver->non_legacy_dai_naming)
+			fmt = inv_dai_fmt;
+
+		ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
+		if (ret != 0 && ret != -ENOTSUPP) {
+			dev_warn(cpu_dai->dev,
+				 "ASoC: Failed to set DAI format: %d\n", ret);
+			return ret;
+		}
 	}
 
 	return 0;
-- 
2.17.1

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[alsa-devel] [PATCH RFC v3 2/4] ASoC: Add multiple CPU DAI support for PCM ops

[Bard liao]

From: Shreyas NC <shreyas.nc@intel.com>

Add support in PCM operations to invoke multiple cpu dais as we do
for multiple codec dais. Also the symmetry calculations are updated to
reflect multiple cpu dais.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 sound/soc/soc-pcm.c | 521 +++++++++++++++++++++++++++++---------------
 1 file changed, 348 insertions(+), 173 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 74d340d1c9f7..ae1017637e86 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -40,24 +40,28 @@
  */
 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
 {
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i;
 
 	lockdep_assert_held(&rtd->card->pcm_mutex);
 
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		cpu_dai->playback_active++;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			cpu_dai->playback_active++;
 		for_each_rtd_codec_dai(rtd, i, codec_dai)
 			codec_dai->playback_active++;
 	} else {
-		cpu_dai->capture_active++;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			cpu_dai->capture_active++;
 		for_each_rtd_codec_dai(rtd, i, codec_dai)
 			codec_dai->capture_active++;
 	}
 
-	cpu_dai->active++;
-	cpu_dai->component->active++;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		cpu_dai->active++;
+		cpu_dai->component->active++;
+	}
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		codec_dai->active++;
 		codec_dai->component->active++;
@@ -76,24 +80,28 @@ void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  */
 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
 {
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i;
 
 	lockdep_assert_held(&rtd->card->pcm_mutex);
 
 	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		cpu_dai->playback_active--;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			cpu_dai->playback_active--;
 		for_each_rtd_codec_dai(rtd, i, codec_dai)
 			codec_dai->playback_active--;
 	} else {
-		cpu_dai->capture_active--;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+			cpu_dai->capture_active--;
 		for_each_rtd_codec_dai(rtd, i, codec_dai)
 			codec_dai->capture_active--;
 	}
 
-	cpu_dai->active--;
-	cpu_dai->component->active--;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		cpu_dai->active--;
+		cpu_dai->component->active--;
+	}
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		codec_dai->component->active--;
 		codec_dai->active--;
@@ -233,7 +241,7 @@ static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	unsigned int rate, channels, sample_bits, symmetry, i;
 
@@ -242,40 +250,60 @@ static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 	sample_bits = snd_pcm_format_physical_width(params_format(params));
 
 	/* reject unmatched parameters when applying symmetry */
-	symmetry = cpu_dai->driver->symmetric_rates ||
-		rtd->dai_link->symmetric_rates;
+	symmetry = rtd->dai_link->symmetric_rates;
+
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		symmetry |= cpu_dai->driver->symmetric_rates;
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		symmetry |= codec_dai->driver->symmetric_rates;
 
-	if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
-		dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
-				cpu_dai->rate, rate);
-		return -EINVAL;
+	if (symmetry) {
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->rate && cpu_dai->rate != rate) {
+				dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
+					cpu_dai->rate, rate);
+				return -EINVAL;
+			}
+		}
 	}
 
-	symmetry = cpu_dai->driver->symmetric_channels ||
-		rtd->dai_link->symmetric_channels;
+	symmetry = rtd->dai_link->symmetric_channels;
+
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		symmetry |= cpu_dai->driver->symmetric_channels;
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		symmetry |= codec_dai->driver->symmetric_channels;
 
-	if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
-		dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
-				cpu_dai->channels, channels);
-		return -EINVAL;
+	if (symmetry) {
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->channels &&
+			    cpu_dai->channels != channels) {
+				dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
+					cpu_dai->channels, channels);
+				return -EINVAL;
+			}
+		}
 	}
 
-	symmetry = cpu_dai->driver->symmetric_samplebits ||
-		rtd->dai_link->symmetric_samplebits;
+	symmetry = rtd->dai_link->symmetric_samplebits;
+
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		symmetry |= cpu_dai->driver->symmetric_samplebits;
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		symmetry |= codec_dai->driver->symmetric_samplebits;
 
-	if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
-		dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
-				cpu_dai->sample_bits, sample_bits);
-		return -EINVAL;
+	if (symmetry) {
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->sample_bits &&
+			    cpu_dai->sample_bits != sample_bits) {
+				dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
+					cpu_dai->sample_bits, sample_bits);
+				return -EINVAL;
+			}
+		}
 	}
 
 	return 0;
@@ -284,14 +312,20 @@ static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 	struct snd_soc_dai_link *link = rtd->dai_link;
 	struct snd_soc_dai *codec_dai;
+	struct snd_soc_dai *cpu_dai;
 	unsigned int symmetry, i;
 
-	symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
-		cpu_driver->symmetric_channels || link->symmetric_channels ||
-		cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
+	symmetry = link->symmetric_rates ||
+		link->symmetric_channels ||
+		link->symmetric_samplebits;
+
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		symmetry = symmetry ||
+			cpu_dai->driver->symmetric_rates ||
+			cpu_dai->driver->symmetric_channels ||
+			cpu_dai->driver->symmetric_samplebits;
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		symmetry = symmetry ||
@@ -319,10 +353,10 @@ static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i;
-	unsigned int bits = 0, cpu_bits;
+	unsigned int bits = 0, cpu_bits = 0;
 
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		for_each_rtd_codec_dai(rtd, i, codec_dai) {
@@ -332,7 +366,14 @@ static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 			}
 			bits = max(codec_dai->driver->playback.sig_bits, bits);
 		}
-		cpu_bits = cpu_dai->driver->playback.sig_bits;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->driver->playback.sig_bits == 0) {
+				cpu_bits = 0;
+				break;
+			}
+			cpu_bits = max(cpu_dai->driver->playback.sig_bits,
+				       bits);
+		}
 	} else {
 		for_each_rtd_codec_dai(rtd, i, codec_dai) {
 			if (codec_dai->driver->capture.sig_bits == 0) {
@@ -341,7 +382,13 @@ static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 			}
 			bits = max(codec_dai->driver->capture.sig_bits, bits);
 		}
-		cpu_bits = cpu_dai->driver->capture.sig_bits;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->driver->capture.sig_bits == 0) {
+				cpu_bits = 0;
+				break;
+			}
+			cpu_bits = max(cpu_dai->driver->capture.sig_bits, bits);
+		}
 	}
 
 	soc_pcm_set_msb(substream, bits);
@@ -354,22 +401,40 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 	struct snd_pcm_hardware *hw = &runtime->hw;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai;
-	struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
+	struct snd_soc_dai *cpu_dai;
+	struct snd_soc_dai_driver *cpu_dai_drv;
 	struct snd_soc_dai_driver *codec_dai_drv;
 	struct snd_soc_pcm_stream *codec_stream;
 	struct snd_soc_pcm_stream *cpu_stream;
 	unsigned int chan_min = 0, chan_max = UINT_MAX;
+	unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
 	unsigned int rate_min = 0, rate_max = UINT_MAX;
-	unsigned int rates = UINT_MAX;
+	unsigned int cpu_rate_min = 0, cpu_rate_max = UINT_MAX;
+	unsigned int rates = UINT_MAX, cpu_rates = UINT_MAX;
 	u64 formats = ULLONG_MAX;
 	int i;
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		cpu_stream = &cpu_dai_drv->playback;
-	else
-		cpu_stream = &cpu_dai_drv->capture;
+	/* first calculate min/max only for CPUs in the DAI link */
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		if (!snd_soc_dai_stream_valid(cpu_dai,
+					      substream->stream))
+			continue;
+
+		cpu_dai_drv = cpu_dai->driver;
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			cpu_stream = &cpu_dai_drv->playback;
+		else
+			cpu_stream = &cpu_dai_drv->capture;
+		cpu_chan_min = max(cpu_chan_min, cpu_stream->channels_min);
+		cpu_chan_max = min(cpu_chan_max, cpu_stream->channels_max);
+		cpu_rate_min = max(cpu_rate_min, cpu_stream->rate_min);
+		cpu_rate_max = min_not_zero(cpu_rate_max, cpu_stream->rate_max);
+		formats &= cpu_stream->formats;
+		cpu_rates = snd_pcm_rate_mask_intersect(cpu_stream->rates,
+							cpu_rates);
+	}
 
-	/* first calculate min/max only for CODECs in the DAI link */
+	/* second calculate min/max only for CODECs in the DAI link */
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 
 		/*
@@ -400,27 +465,28 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 
 	/*
 	 * chan min/max cannot be enforced if there are multiple CODEC DAIs
-	 * connected to a single CPU DAI, use CPU DAI's directly and let
+	 * connected to CPU DAI(s), use CPU DAI's directly and let
 	 * channel allocation be fixed up later
 	 */
 	if (rtd->num_codecs > 1) {
-		chan_min = cpu_stream->channels_min;
-		chan_max = cpu_stream->channels_max;
+		chan_min = cpu_chan_min;
+		chan_max = cpu_chan_max;
 	}
 
-	hw->channels_min = max(chan_min, cpu_stream->channels_min);
-	hw->channels_max = min(chan_max, cpu_stream->channels_max);
+	/* finally find a intersection between CODECs and CPUs */
+	hw->channels_min = max(chan_min, cpu_chan_min);
+	hw->channels_max = min(chan_max, cpu_chan_max);
 	if (hw->formats)
-		hw->formats &= formats & cpu_stream->formats;
+		hw->formats &= formats;
 	else
-		hw->formats = formats & cpu_stream->formats;
-	hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
+		hw->formats = formats;
+	hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_rates);
 
 	snd_pcm_limit_hw_rates(runtime);
 
-	hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
+	hw->rate_min = max(hw->rate_min, cpu_rate_min);
 	hw->rate_min = max(hw->rate_min, rate_min);
-	hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
+	hw->rate_max = min_not_zero(hw->rate_max, cpu_rate_max);
 	hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 }
 
@@ -482,9 +548,10 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	const char *codec_dai_name = "multicodec";
+	const char *cpu_dai_name = "multicpu";
 	int i, ret = 0;
 
 	for_each_rtd_components(rtd, i, component)
@@ -496,11 +563,13 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 
 	/* startup the audio subsystem */
-	ret = snd_soc_dai_startup(cpu_dai, substream);
-	if (ret < 0) {
-		dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
-			cpu_dai->name, ret);
-		goto out;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_startup(cpu_dai, substream);
+		if (ret < 0) {
+			dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
+				cpu_dai->name, ret);
+			goto interface_err;
+		}
 	}
 
 	ret = soc_pcm_components_open(substream, &component);
@@ -541,34 +610,39 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	if (rtd->num_codecs == 1)
 		codec_dai_name = rtd->codec_dai->name;
 
+	if (rtd->num_cpus == 1)
+		cpu_dai_name = rtd->cpu_dai->name;
+
 	if (soc_pcm_has_symmetry(substream))
 		runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 
 	ret = -EINVAL;
 	if (!runtime->hw.rates) {
 		printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
-			codec_dai_name, cpu_dai->name);
+			codec_dai_name, cpu_dai_name);
 		goto config_err;
 	}
 	if (!runtime->hw.formats) {
 		printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
-			codec_dai_name, cpu_dai->name);
+			codec_dai_name, cpu_dai_name);
 		goto config_err;
 	}
 	if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 	    runtime->hw.channels_min > runtime->hw.channels_max) {
 		printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
-				codec_dai_name, cpu_dai->name);
+				codec_dai_name, cpu_dai_name);
 		goto config_err;
 	}
 
 	soc_pcm_apply_msb(substream);
 
 	/* Symmetry only applies if we've already got an active stream. */
-	if (cpu_dai->active) {
-		ret = soc_pcm_apply_symmetry(substream, cpu_dai);
-		if (ret != 0)
-			goto config_err;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		if (cpu_dai->active) {
+			ret = soc_pcm_apply_symmetry(substream, cpu_dai);
+			if (ret != 0)
+				goto config_err;
+		}
 	}
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
@@ -580,7 +654,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	}
 
 	pr_debug("ASoC: %s <-> %s info:\n",
-			codec_dai_name, cpu_dai->name);
+		 codec_dai_name, cpu_dai_name);
 	pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 	pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 		 runtime->hw.channels_max);
@@ -608,8 +682,12 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 component_err:
 	soc_pcm_components_close(substream, component);
 
-	snd_soc_dai_shutdown(cpu_dai, substream);
-out:
+	i = rtd->num_cpus;
+
+interface_err:
+	for_each_rtd_cpu_dai_rollback(rtd, i, cpu_dai)
+		snd_soc_dai_shutdown(cpu_dai, substream);
+
 	mutex_unlock(&rtd->card->pcm_mutex);
 
 	for_each_rtd_components(rtd, i, component) {
@@ -643,7 +721,7 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i;
 
@@ -652,17 +730,21 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
 	snd_soc_runtime_deactivate(rtd, substream->stream);
 
 	/* clear the corresponding DAIs rate when inactive */
-	if (!cpu_dai->active)
-		cpu_dai->rate = 0;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		if (!cpu_dai->active)
+			cpu_dai->rate = 0;
+	}
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		if (!codec_dai->active)
 			codec_dai->rate = 0;
 	}
 
-	snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 
-	snd_soc_dai_shutdown(cpu_dai, substream);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		snd_soc_dai_shutdown(cpu_dai, substream);
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		snd_soc_dai_shutdown(codec_dai, substream);
@@ -697,7 +779,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret = 0;
 
@@ -731,11 +813,13 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 		}
 	}
 
-	ret = snd_soc_dai_prepare(cpu_dai, substream);
-	if (ret < 0) {
-		dev_err(cpu_dai->dev,
-			"ASoC: cpu DAI prepare error: %d\n", ret);
-		goto out;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_prepare(cpu_dai, substream);
+		if (ret < 0) {
+			dev_err(cpu_dai->dev,
+				"ASoC: cpu DAI prepare error: %d\n", ret);
+			goto out;
+		}
 	}
 
 	/* cancel any delayed stream shutdown that is pending */
@@ -751,7 +835,8 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		snd_soc_dai_digital_mute(codec_dai, 0,
 					 substream->stream);
-	snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 
 out:
 	mutex_unlock(&rtd->card->pcm_mutex);
@@ -796,7 +881,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret = 0;
 
@@ -862,17 +947,19 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 		snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 	}
 
-	ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
-	if (ret < 0)
-		goto interface_err;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
+		if (ret < 0)
+			goto interface_err;
 
-	/* store the parameters for each DAIs */
-	cpu_dai->rate = params_rate(params);
-	cpu_dai->channels = params_channels(params);
-	cpu_dai->sample_bits =
-		snd_pcm_format_physical_width(params_format(params));
+		/* store the parameters for each DAI */
+		cpu_dai->rate = params_rate(params);
+		cpu_dai->channels = params_channels(params);
+		cpu_dai->sample_bits =
+			snd_pcm_format_physical_width(params_format(params));
 
-	snd_soc_dapm_update_dai(substream, params, cpu_dai);
+		snd_soc_dapm_update_dai(substream, params, cpu_dai);
+	}
 
 	for_each_rtd_components(rtd, i, component) {
 		ret = snd_soc_component_hw_params(component, substream, params);
@@ -892,10 +979,17 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 component_err:
 	soc_pcm_components_hw_free(substream, component);
 
-	snd_soc_dai_hw_free(cpu_dai, substream);
-	cpu_dai->rate = 0;
+	i = rtd->num_cpus;
 
 interface_err:
+	for_each_rtd_cpu_dai_rollback(rtd, i, cpu_dai) {
+		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
+			continue;
+
+		snd_soc_dai_hw_free(cpu_dai, substream);
+		cpu_dai->rate = 0;
+	}
+
 	i = rtd->num_codecs;
 
 codec_err:
@@ -920,20 +1014,23 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	int i;
 
 	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 
-	/* clear the corresponding DAIs parameters when going to be inactive */
-	if (cpu_dai->active == 1) {
-		cpu_dai->rate = 0;
-		cpu_dai->channels = 0;
-		cpu_dai->sample_bits = 0;
+	/* clear all CPU DAIs parameters when inactive */
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		if (cpu_dai->active == 1) {
+			cpu_dai->rate = 0;
+			cpu_dai->channels = 0;
+			cpu_dai->sample_bits = 0;
+		}
 	}
 
+	/* clear all CODEC DAIs parameters when inactive */
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		if (codec_dai->active == 1) {
 			codec_dai->rate = 0;
@@ -965,7 +1062,12 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 		snd_soc_dai_hw_free(codec_dai, substream);
 	}
 
-	snd_soc_dai_hw_free(cpu_dai, substream);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
+			continue;
+
+		snd_soc_dai_hw_free(cpu_dai, substream);
+	}
 
 	mutex_unlock(&rtd->card->pcm_mutex);
 	return 0;
@@ -975,7 +1077,7 @@ static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret;
 
@@ -991,9 +1093,11 @@ static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
 			return ret;
 	}
 
-	ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
-	if (ret < 0)
-		return ret;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
+		if (ret < 0)
+			return ret;
+	}
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
@@ -1008,7 +1112,7 @@ static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_component *component;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret;
 
@@ -1018,9 +1122,11 @@ static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
 			return ret;
 	}
 
-	ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
-	if (ret < 0)
-		return ret;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
+		if (ret < 0)
+			return ret;
+	}
 
 	for_each_rtd_components(rtd, i, component) {
 		ret = snd_soc_component_trigger(component, substream, cmd);
@@ -1063,7 +1169,7 @@ static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
 				   int cmd)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	int i, ret;
 
@@ -1073,9 +1179,11 @@ static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
 			return ret;
 	}
 
-	ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
-	if (ret < 0)
-		return ret;
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
+		if (ret < 0)
+			return ret;
+	}
 
 	return 0;
 }
@@ -1087,12 +1195,13 @@ static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *cpu_dai;
 	struct snd_soc_dai *codec_dai;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	snd_pcm_uframes_t offset = 0;
 	snd_pcm_sframes_t delay = 0;
 	snd_pcm_sframes_t codec_delay = 0;
+	snd_pcm_sframes_t cpu_delay = 0;
 	int i;
 
 	/* clearing the previous total delay */
@@ -1103,7 +1212,11 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 	/* base delay if assigned in pointer callback */
 	delay = runtime->delay;
 
-	delay += snd_soc_dai_delay(cpu_dai, substream);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		cpu_delay = max(cpu_delay,
+				snd_soc_dai_delay(cpu_dai, substream));
+	}
+	delay += cpu_delay;
 
 	for_each_rtd_codec_dai(rtd, i, codec_dai) {
 		codec_delay = max(codec_delay,
@@ -1229,6 +1342,7 @@ static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
 {
 	struct snd_soc_pcm_runtime *be;
 	struct snd_soc_dai *dai;
+	struct snd_soc_dai *cpu_dai;
 	int i;
 
 	dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
@@ -1239,12 +1353,15 @@ static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
 			if (!be->dai_link->no_pcm)
 				continue;
 
-			dev_dbg(card->dev, "ASoC: try BE : %s\n",
-				be->cpu_dai->playback_widget ?
-				be->cpu_dai->playback_widget->name : "(not set)");
+			for_each_rtd_cpu_dai(be, i, cpu_dai) {
+				dev_dbg(card->dev, "ASoC: try BE : %s\n",
+					cpu_dai->playback_widget ?
+					cpu_dai->playback_widget->name :
+					"(not set)");
 
-			if (be->cpu_dai->playback_widget == widget)
-				return be;
+				if (cpu_dai->playback_widget == widget)
+					return be;
+			}
 
 			for_each_rtd_codec_dai(be, i, dai) {
 				if (dai->playback_widget == widget)
@@ -1258,12 +1375,15 @@ static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
 			if (!be->dai_link->no_pcm)
 				continue;
 
-			dev_dbg(card->dev, "ASoC: try BE %s\n",
-				be->cpu_dai->capture_widget ?
-				be->cpu_dai->capture_widget->name : "(not set)");
+			for_each_rtd_cpu_dai(be, i, cpu_dai) {
+				dev_dbg(card->dev, "ASoC: try BE %s\n",
+					cpu_dai->capture_widget ?
+					cpu_dai->capture_widget->name :
+					"(not set)");
 
-			if (be->cpu_dai->capture_widget == widget)
-				return be;
+				if (cpu_dai->capture_widget == widget)
+					return be;
+			}
 
 			for_each_rtd_codec_dai(be, i, dai) {
 				if (dai->capture_widget == widget)
@@ -1313,8 +1433,10 @@ static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
 			if (!rtd->dai_link->no_pcm)
 				continue;
 
-			if (rtd->cpu_dai->playback_widget == widget)
-				return true;
+			for_each_rtd_cpu_dai(rtd, i, dai) {
+				if (dai->playback_widget == widget)
+					return true;
+			}
 
 			for_each_rtd_codec_dai(rtd, i, dai) {
 				if (dai->playback_widget == widget)
@@ -1326,8 +1448,10 @@ static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
 			if (!rtd->dai_link->no_pcm)
 				continue;
 
-			if (rtd->cpu_dai->capture_widget == widget)
-				return true;
+			for_each_rtd_cpu_dai(rtd, i, dai) {
+				if (dai->capture_widget == widget)
+					return true;
+			}
 
 			for_each_rtd_codec_dai(rtd, i, dai) {
 				if (dai->capture_widget == widget)
@@ -1370,10 +1494,18 @@ static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
 		unsigned int i;
 
 		/* is there a valid CPU DAI widget for this BE */
-		widget = dai_get_widget(dpcm->be->cpu_dai, stream);
+		do_prune = 1;
+		for_each_rtd_cpu_dai(dpcm->be, i, dai) {
+			widget = dai_get_widget(dai, stream);
 
-		/* prune the BE if it's no longer in our active list */
-		if (widget && widget_in_list(list, widget))
+			/*
+			 * The BE is pruned only if none of the cpu_dai
+			 * widgets are in the active list.
+			 */
+			if (widget && widget_in_list(list, widget))
+				do_prune = 0;
+		}
+		if (!do_prune)
 			continue;
 
 		/* is there a valid CODEC DAI widget for this BE */
@@ -1672,18 +1804,32 @@ static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
 
 	for_each_dpcm_be(fe, stream, dpcm) {
 		struct snd_soc_pcm_runtime *be = dpcm->be;
-		struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
+		struct snd_soc_dai_driver *cpu_dai_drv;
 		struct snd_soc_dai_driver *codec_dai_drv;
 		struct snd_soc_pcm_stream *codec_stream;
 		struct snd_soc_pcm_stream *cpu_stream;
+		struct snd_soc_dai *dai;
+		int i;
 
-		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
-			cpu_stream = &cpu_dai_drv->playback;
-		else
-			cpu_stream = &cpu_dai_drv->capture;
+		for_each_rtd_cpu_dai(be, i, dai) {
+			/*
+			 * Skip CPUs which don't support the current stream
+			 * type. See soc_pcm_init_runtime_hw() for more details
+			 */
+			if (!snd_soc_dai_stream_valid(dai, stream))
+				continue;
 
-		*channels_min = max(*channels_min, cpu_stream->channels_min);
-		*channels_max = min(*channels_max, cpu_stream->channels_max);
+			cpu_dai_drv =  dai->driver;
+			if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+				cpu_stream = &cpu_dai_drv->playback;
+			else
+				cpu_stream = &cpu_dai_drv->capture;
+
+			*channels_min = max(*channels_min,
+					    cpu_stream->channels_min);
+			*channels_max = min(*channels_max,
+					    cpu_stream->channels_max);
+		}
 
 		/*
 		 * chan min/max cannot be enforced if there are multiple CODEC
@@ -1724,21 +1870,33 @@ static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
 
 	for_each_dpcm_be(fe, stream, dpcm) {
 		struct snd_soc_pcm_runtime *be = dpcm->be;
-		struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
+		struct snd_soc_dai_driver *cpu_dai_drv;
 		struct snd_soc_dai_driver *codec_dai_drv;
 		struct snd_soc_pcm_stream *codec_stream;
 		struct snd_soc_pcm_stream *cpu_stream;
 		struct snd_soc_dai *dai;
 		int i;
 
-		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
-			cpu_stream = &cpu_dai_drv->playback;
-		else
-			cpu_stream = &cpu_dai_drv->capture;
+		for_each_rtd_cpu_dai(be, i, dai) {
+			/*
+			 * Skip CPUs which don't support the current stream
+			 * type. See soc_pcm_init_runtime_hw() for more details
+			 */
+			if (!snd_soc_dai_stream_valid(dai, stream))
+				continue;
 
-		*rate_min = max(*rate_min, cpu_stream->rate_min);
-		*rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
-		*rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
+			cpu_dai_drv =  dai->driver;
+			if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+				cpu_stream = &cpu_dai_drv->playback;
+			else
+				cpu_stream = &cpu_dai_drv->capture;
+
+			*rate_min = max(*rate_min, cpu_stream->rate_min);
+			*rate_max = min_not_zero(*rate_max,
+						 cpu_stream->rate_max);
+			*rates = snd_pcm_rate_mask_intersect(*rates,
+						cpu_stream->rates);
+		}
 
 		for_each_rtd_codec_dai(be, i, dai) {
 			/*
@@ -1767,13 +1925,17 @@ static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
+	struct snd_soc_dai *cpu_dai;
+	struct snd_soc_dai_driver *cpu_dai_drv;
+	int i;
 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
-	else
-		dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+		cpu_dai_drv = cpu_dai->driver;
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
+		else
+			dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
+	}
 
 	dpcm_runtime_merge_format(substream, &runtime->hw.formats);
 	dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
@@ -1831,6 +1993,7 @@ static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
 			snd_soc_dpcm_get_substream(be, stream);
 		struct snd_soc_pcm_runtime *rtd;
 		struct snd_soc_dai *codec_dai;
+		struct snd_soc_dai *cpu_dai;
 		int i;
 
 		/* A backend may not have the requested substream */
@@ -1845,11 +2008,13 @@ static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
 			be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 
 		/* Symmetry only applies if we've got an active stream. */
-		if (rtd->cpu_dai->active) {
-			err = soc_pcm_apply_symmetry(fe_substream,
-						     rtd->cpu_dai);
-			if (err < 0)
-				return err;
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (cpu_dai->active) {
+				err = soc_pcm_apply_symmetry(fe_substream,
+							     cpu_dai);
+				if (err < 0)
+					return err;
+			}
 		}
 
 		for_each_rtd_codec_dai(rtd, i, codec_dai) {
@@ -2836,7 +3001,7 @@ static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
 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_dai *cpu_dai;
 	struct snd_soc_component *component;
 	struct snd_pcm *pcm;
 	char new_name[64];
@@ -2847,23 +3012,33 @@ 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 {
+		int stream_playback;
+		int stream_capture;
 		/* 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;
+		if (rtd->dai_link->params) {
+			stream_playback = SNDRV_PCM_STREAM_CAPTURE;
+			stream_capture  = SNDRV_PCM_STREAM_PLAYBACK;
+		} else {
+			stream_playback = SNDRV_PCM_STREAM_PLAYBACK;
+			stream_capture  = SNDRV_PCM_STREAM_CAPTURE;
+		}
 
-		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))
-				playback = 1;
-			if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
-			    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
-				capture = 1;
+		playback = 1;
+		capture = 1;
+
+		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
+			if (!snd_soc_dai_stream_valid(cpu_dai, stream_playback))
+				playback = 0;
+			if (!snd_soc_dai_stream_valid(cpu_dai, stream_capture))
+				capture = 0;
 		}
 
-		capture = capture && cpu_capture->channels_min;
-		playback = playback && cpu_playback->channels_min;
+		for_each_rtd_codec_dai(rtd, i, codec_dai) {
+			if (!snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
+				playback = 0;
+			if (!snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE))
+				capture = 0;
+		}
 	}
 
 	if (rtd->dai_link->playback_only) {
@@ -2977,7 +3152,7 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 out:
 	dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
 		 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
-		 cpu_dai->name);
+		 (rtd->num_cpus > 1) ? "multicpu" : rtd->cpu_dai->name);
 	return ret;
 }
 
-- 
2.17.1

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[alsa-devel] [PATCH RFC v3 3/4] ASoC: Add multiple CPU DAI support in DAPM

[Bard liao]

From: Shreyas NC <shreyas.nc@intel.com>

DAPM handles DAIs during soc_dapm_stream_event() and during addition
and creation of DAI widgets i.e., dapm_add_valid_dai_widget() and
dapm_connect_dai_link_widgets().

Extend these functions to handle multiple cpu dai.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 sound/soc/soc-dapm.c | 131 +++++++++++++++++++++++++------------------
 1 file changed, 75 insertions(+), 56 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 442846f12cd4..7a0538b45faf 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -4274,16 +4274,15 @@ int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
 	return 0;
 }
 
-static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
-					  struct snd_soc_pcm_runtime *rtd)
+static void dapm_add_valid_dai_widget(struct snd_soc_card *card,
+				      struct snd_soc_pcm_runtime *rtd,
+				      struct snd_soc_dai *codec_dai,
+				      struct snd_soc_dai *cpu_dai)
 {
-	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	struct snd_soc_dai *codec_dai;
 	struct snd_soc_dapm_widget *playback = NULL, *capture = NULL;
 	struct snd_soc_dapm_widget *codec, *playback_cpu, *capture_cpu;
 	struct snd_pcm_substream *substream;
 	struct snd_pcm_str *streams = rtd->pcm->streams;
-	int i;
 
 	if (rtd->dai_link->params) {
 		playback_cpu = cpu_dai->capture_widget;
@@ -4295,64 +4294,82 @@ static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
 		capture_cpu = capture;
 	}
 
-	for_each_rtd_codec_dai(rtd, i, codec_dai) {
-		/* connect BE DAI playback if widgets are valid */
-		codec = codec_dai->playback_widget;
-
-		if (playback_cpu && codec) {
-			if (!playback) {
-				substream = streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
-				playback = snd_soc_dapm_new_dai(card, substream,
-								"playback");
-				if (IS_ERR(playback)) {
-					dev_err(rtd->dev,
-						"ASoC: Failed to create DAI %s: %ld\n",
-						codec_dai->name,
-						PTR_ERR(playback));
-					continue;
-				}
-
-				snd_soc_dapm_add_path(&card->dapm, playback_cpu,
-						      playback, NULL, NULL);
+	/* connect BE DAI playback if widgets are valid */
+	codec = codec_dai->playback_widget;
+
+	if (playback_cpu && codec) {
+		if (!playback) {
+			substream = streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+			playback = snd_soc_dapm_new_dai(card, substream,
+							"playback");
+			if (IS_ERR(playback)) {
+				dev_err(rtd->dev,
+					"ASoC: Failed to create DAI %s: %ld\n",
+					codec_dai->name,
+					PTR_ERR(playback));
+				return;
 			}
 
-			dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
-				cpu_dai->component->name, playback_cpu->name,
-				codec_dai->component->name, codec->name);
-
-			snd_soc_dapm_add_path(&card->dapm, playback, codec,
-					      NULL, NULL);
+			snd_soc_dapm_add_path(&card->dapm, playback_cpu,
+					      playback, NULL, NULL);
 		}
+
+		dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+			cpu_dai->component->name, playback_cpu->name,
+			codec_dai->component->name, codec->name);
+
+		snd_soc_dapm_add_path(&card->dapm, playback, codec,
+				      NULL, NULL);
 	}
 
-	for_each_rtd_codec_dai(rtd, i, codec_dai) {
-		/* connect BE DAI capture if widgets are valid */
-		codec = codec_dai->capture_widget;
-
-		if (codec && capture_cpu) {
-			if (!capture) {
-				substream = streams[SNDRV_PCM_STREAM_CAPTURE].substream;
-				capture = snd_soc_dapm_new_dai(card, substream,
-							       "capture");
-				if (IS_ERR(capture)) {
-					dev_err(rtd->dev,
-						"ASoC: Failed to create DAI %s: %ld\n",
-						codec_dai->name,
-						PTR_ERR(capture));
-					continue;
-				}
-
-				snd_soc_dapm_add_path(&card->dapm, capture,
-						      capture_cpu, NULL, NULL);
-			}
+	/* connect BE DAI capture if widgets are valid */
+	codec = codec_dai->capture_widget;
 
-			dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
-				codec_dai->component->name, codec->name,
-				cpu_dai->component->name, capture_cpu->name);
+	if (codec && capture_cpu) {
+		if (!capture) {
+			substream = streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+			capture = snd_soc_dapm_new_dai(card, substream,
+						       "capture");
+			if (IS_ERR(capture)) {
+				dev_err(rtd->dev,
+					"ASoC: Failed to create DAI %s: %ld\n",
+					codec_dai->name,
+					PTR_ERR(capture));
+				return;
+			}
 
-			snd_soc_dapm_add_path(&card->dapm, codec, capture,
-					      NULL, NULL);
+			snd_soc_dapm_add_path(&card->dapm, capture,
+					      capture_cpu, NULL, NULL);
 		}
+
+		dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+			codec_dai->component->name, codec->name,
+			cpu_dai->component->name, capture_cpu->name);
+
+		snd_soc_dapm_add_path(&card->dapm, codec, capture,
+				      NULL, NULL);
+	}
+}
+
+static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
+					  struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai *codec_dai;
+	int i;
+
+	if (rtd->num_cpus > 1) {
+		if (rtd->num_codecs == rtd->num_cpus)
+			for_each_rtd_codec_dai(rtd, i, codec_dai)
+				dapm_add_valid_dai_widget(card, rtd,
+							  codec_dai,
+							  rtd->cpu_dais[i]);
+		else
+			dev_err(card->dev,
+				"N cpus to M codecs link is not supported yet\n");
+	} else {
+		for_each_rtd_codec_dai(rtd, i, codec_dai)
+			dapm_add_valid_dai_widget(card, rtd,
+						  codec_dai, rtd->cpu_dais[0]);
 	}
 }
 
@@ -4417,9 +4434,11 @@ static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
 	int event)
 {
 	struct snd_soc_dai *codec_dai;
+	struct snd_soc_dai *cpu_dai;
 	int i;
 
-	soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
+	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
+		soc_dapm_dai_stream_event(cpu_dai, stream, event);
 	for_each_rtd_codec_dai(rtd, i, codec_dai)
 		soc_dapm_dai_stream_event(codec_dai, stream, event);
 
-- 
2.17.1

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[alsa-devel] [PATCH RFC v3 4/4] ASoC: return error if the function is not support multi cpu yet.

[Bard liao]

Multi cpu is not supported by all functions yet. Add an error message
and return.

Suggested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Bard liao <yung-chuan.liao@linux.intel.com>
---
 sound/soc/soc-compress.c              |  5 +++--
 sound/soc/soc-generic-dmaengine-pcm.c | 18 ++++++++++++++++++
 sound/soc/soc-pcm.c                   | 18 ++++++++++++++++++
 3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 223cd045719e..4bdef7f6d968 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -810,9 +810,10 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 	int playback = 0, capture = 0;
 	int i;
 
-	if (rtd->num_codecs > 1) {
+	if (rtd->num_cpus > 1 ||
+	    rtd->num_codecs) {
 		dev_err(rtd->card->dev,
-			"Compress ASoC: Multicodec not supported\n");
+			"Compress ASoC: Multi CPU/Codec not supported\n");
 		return -EINVAL;
 	}
 
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index df57ec47ad60..781752b67e90 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -62,6 +62,12 @@ int snd_dmaengine_pcm_prepare_slave_config(struct snd_pcm_substream *substream,
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	int ret;
 
+	if (rtd->num_cpus > 1) {
+		dev_err(rtd->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
 	ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
@@ -119,6 +125,12 @@ dmaengine_pcm_set_runtime_hwparams(struct snd_soc_component *component,
 	struct snd_pcm_hardware hw;
 	int ret;
 
+	if (rtd->num_cpus > 1) {
+		dev_err(rtd->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	if (pcm->config && pcm->config->pcm_hardware)
 		return snd_soc_set_runtime_hwparams(substream,
 				pcm->config->pcm_hardware);
@@ -183,6 +195,12 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
 	struct snd_dmaengine_dai_dma_data *dma_data;
 	dma_filter_fn fn = NULL;
 
+	if (rtd->num_cpus > 1) {
+		dev_err(rtd->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index ae1017637e86..1932115cf4ba 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1469,6 +1469,12 @@ int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
 	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
 	int paths;
 
+	if (fe->num_cpus > 1) {
+		dev_err(fe->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	/* get number of valid DAI paths and their widgets */
 	paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
 			dpcm_end_walk_at_be);
@@ -2808,6 +2814,12 @@ static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
 	struct snd_soc_dapm_widget_list *list;
 	int count, paths;
 
+	if (fe->num_cpus > 1) {
+		dev_err(fe->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	if (!fe->dai_link->dynamic)
 		return 0;
 
@@ -3364,6 +3376,12 @@ static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
 	ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
 	char *buf;
 
+	if (fe->num_cpus > 1) {
+		dev_err(fe->dev,
+			 "%s doesn't support Multi CPU yet\n", __func__);
+		return -EINVAL;
+	}
+
 	buf = kmalloc(out_count, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
-- 
2.17.1

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Re: [alsa-devel] [PATCH RFC v3 2/4] ASoC: Add multiple CPU DAI support for PCM ops

[Pierre-Louis Bossart]

I noticed a couple of code changes, we should probably do a code 
refactor first and add those changes, then add the multi-cpu support.

> @@ -892,10 +979,17 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
>   component_err:
>   	soc_pcm_components_hw_free(substream, component);
>   
> -	snd_soc_dai_hw_free(cpu_dai, substream);
> -	cpu_dai->rate = 0;
> +	i = rtd->num_cpus;
>   
>   interface_err:
> +	for_each_rtd_cpu_dai_rollback(rtd, i, cpu_dai) {
> +		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
> +			continue;

maybe this check should be added to the existing code before adding 
multi-cpu support? it looks copy/pasted from the codec case, but is it a 
miss in the existing code?

> +
> +		snd_soc_dai_hw_free(cpu_dai, substream);
> +		cpu_dai->rate = 0;
> +	}
> +

[...]

> @@ -965,7 +1062,12 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
>   		snd_soc_dai_hw_free(codec_dai, substream);
>   	}
>   
> -	snd_soc_dai_hw_free(cpu_dai, substream);
> +	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
> +		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
> +			continue;
> +
> +		snd_soc_dai_hw_free(cpu_dai, substream);
> +	}

same here, the hw_free should be first made conditional on the stream 
being valid, before introducing multi-cpu-dai support?


> @@ -1672,18 +1804,32 @@ static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
>   
>   	for_each_dpcm_be(fe, stream, dpcm) {
>   		struct snd_soc_pcm_runtime *be = dpcm->be;
> -		struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
> +		struct snd_soc_dai_driver *cpu_dai_drv;
>   		struct snd_soc_dai_driver *codec_dai_drv;
>   		struct snd_soc_pcm_stream *codec_stream;
>   		struct snd_soc_pcm_stream *cpu_stream;
> +		struct snd_soc_dai *dai;
> +		int i;
>   
> -		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
> -			cpu_stream = &cpu_dai_drv->playback;
> -		else
> -			cpu_stream = &cpu_dai_drv->capture;
> +		for_each_rtd_cpu_dai(be, i, dai) {
> +			/*
> +			 * Skip CPUs which don't support the current stream
> +			 * type. See soc_pcm_init_runtime_hw() for more details
> +			 */
> +			if (!snd_soc_dai_stream_valid(dai, stream))
> +				continue;

and here as well, this is a new test that didn't exist before?


> @@ -2847,23 +3012,33 @@ 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 {
> +		int stream_playback;
> +		int stream_capture;
>   		/* 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;
> +		if (rtd->dai_link->params) {
> +			stream_playback = SNDRV_PCM_STREAM_CAPTURE;
> +			stream_capture  = SNDRV_PCM_STREAM_PLAYBACK;
> +		} else {
> +			stream_playback = SNDRV_PCM_STREAM_PLAYBACK;
> +			stream_capture  = SNDRV_PCM_STREAM_CAPTURE;
> +		}
>   
> -		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))

the logic for this entire block isn't easy to follow, maybe we should 
first move the cpu case out of the codec_dai loop and refactor the code 
before adding the multi-cpu case.

> -				playback = 1;
> -			if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
> -			    snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
> -				capture = 1;
> +		playback = 1;
> +		capture = 1;
> +
> +		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
> +			if (!snd_soc_dai_stream_valid(cpu_dai, stream_playback))
> +				playback = 0;
> +			if (!snd_soc_dai_stream_valid(cpu_dai, stream_capture))
> +				capture = 0;
>   		}
>   
> -		capture = capture && cpu_capture->channels_min;
> -		playback = playback && cpu_playback->channels_min;

channels_min is no longer used so it's somewhat confusing if the new 
code is iso-functionality?
I'd prefer a code refactor that we can double check, then add the 
cpu_dai loop.

> +		for_each_rtd_codec_dai(rtd, i, codec_dai) {
> +			if (!snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
> +				playback = 0;
> +			if (!snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE))
> +				capture = 0;
> +		}
>   	}
>   
>   	if (rtd->dai_link->playback_only) {
> @@ -2977,7 +3152,7 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
>   out:
>   	dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
>   		 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
> -		 cpu_dai->name);
> +		 (rtd->num_cpus > 1) ? "multicpu" : rtd->cpu_dai->name);
>   	return ret;
>   }
>   
> 
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Re: [alsa-devel] [PATCH RFC v3 3/4] ASoC: Add multiple CPU DAI support in DAPM

[Pierre-Louis Bossart]

On 1/16/20 2:26 PM, Bard liao wrote:
> From: Shreyas NC <shreyas.nc@intel.com>
> 
> DAPM handles DAIs during soc_dapm_stream_event() and during addition
> and creation of DAI widgets i.e., dapm_add_valid_dai_widget() and
> dapm_connect_dai_link_widgets().
> 
> Extend these functions to handle multiple cpu dai.
> 
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> Signed-off-by: Shreyas NC <shreyas.nc@intel.com>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
> ---
>   sound/soc/soc-dapm.c | 131 +++++++++++++++++++++++++------------------
>   1 file changed, 75 insertions(+), 56 deletions(-)
> 
> diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
> index 442846f12cd4..7a0538b45faf 100644
> --- a/sound/soc/soc-dapm.c
> +++ b/sound/soc/soc-dapm.c
> @@ -4274,16 +4274,15 @@ int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
>   	return 0;
>   }
>   
> -static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
> -					  struct snd_soc_pcm_runtime *rtd)
> +static void dapm_add_valid_dai_widget(struct snd_soc_card *card,
> +				      struct snd_soc_pcm_runtime *rtd,
> +				      struct snd_soc_dai *codec_dai,
> +				      struct snd_soc_dai *cpu_dai)

[...]

> +static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
> +					  struct snd_soc_pcm_runtime *rtd)
> +{
> +	struct snd_soc_dai *codec_dai;
> +	int i;
> +
> +	if (rtd->num_cpus > 1) {
> +		if (rtd->num_codecs == rtd->num_cpus)
> +			for_each_rtd_codec_dai(rtd, i, codec_dai)
> +				dapm_add_valid_dai_widget(card, rtd,
> +							  codec_dai,
> +							  rtd->cpu_dais[i]);
> +		else
> +			dev_err(card->dev,
> +				"N cpus to M codecs link is not supported yet\n");
> +	} else {
> +		for_each_rtd_codec_dai(rtd, i, codec_dai)
> +			dapm_add_valid_dai_widget(card, rtd,
> +						  codec_dai, rtd->cpu_dais[0]);


I would suggest introducing the new helper in an earlier patch, then the 
addition of the multi-cpu-dai case would be a lot easier to review - and 
make sure there's no regression.

This patch is difficult to double-check with too many unrelated code 
moves due to the new helper.

>   	}
>   }
>   
> @@ -4417,9 +4434,11 @@ static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
>   	int event)
>   {
>   	struct snd_soc_dai *codec_dai;
> +	struct snd_soc_dai *cpu_dai;
>   	int i;
>   
> -	soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
> +	for_each_rtd_cpu_dai(rtd, i, cpu_dai)
> +		soc_dapm_dai_stream_event(cpu_dai, stream, event);
>   	for_each_rtd_codec_dai(rtd, i, codec_dai)
>   		soc_dapm_dai_stream_event(codec_dai, stream, event);
>   
> 
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Re: [alsa-devel] [PATCH RFC v3 4/4] ASoC: return error if the function is not support multi cpu yet.

[Pierre-Louis Bossart]

> @@ -810,9 +810,10 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
>   	int playback = 0, capture = 0;
>   	int i;
>   
> -	if (rtd->num_codecs > 1) {
> +	if (rtd->num_cpus > 1 ||
> +	    rtd->num_codecs) {

this should be num_codecs > 1?
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Re: [alsa-devel] [PATCH RFC v3 0/4] ASoC: Add Multi CPU DAI support

[Pierre-Louis Bossart]

On 1/16/20 2:26 PM, Bard liao wrote:
> As discussed in [1], ASoC core supports multi codec DAIs
> on a DAI link. However it does not do so for CPU DAIs.
> 
> So, add support for multi CPU DAIs on a DAI Link by adding
> multi CPU DAI in Card instantiation, suspend and resume
> functions, PCM ops, stream handling functions and DAPM.
> 
> [1]: https://www.spinics.net/lists/alsa-devel/msg71369.html
> 
> changes in v3:
>   - Return error if the function doesn't support multi cpu instead of
>     just showing a warning message.
>   - Revert changes for FE dai and compress device since we don't support
>     multi cpu for FE dai and compress device yet.

The code looks mostly good, except for an error in soc-compress (patch 4).

I would still suggest refactoring code first, adding the new checks or 
helpers first, to make sure we have the same functionality before adding 
the multi-cpu-dais, see specific points in the other emails.

Thanks Bard and Morimoto-san.

> 
> Bard liao (1):
>    ASoC: return error if the function is not support multi cpu yet.
> 
> Shreyas NC (3):
>    ASoC: Add initial support for multiple CPU DAIs
>    ASoC: Add multiple CPU DAI support for PCM ops
>    ASoC: Add multiple CPU DAI support in DAPM
> 
>   include/sound/soc.h                   |  15 +
>   sound/soc/soc-compress.c              |   5 +-
>   sound/soc/soc-core.c                  | 205 +++++-----
>   sound/soc/soc-dapm.c                  | 131 ++++---
>   sound/soc/soc-generic-dmaengine-pcm.c |  18 +
>   sound/soc/soc-pcm.c                   | 539 +++++++++++++++++---------
>   6 files changed, 591 insertions(+), 322 deletions(-)
> 
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Re: [alsa-devel] [PATCH RFC v3 2/4] ASoC: Add multiple CPU DAI support for PCM ops

[Liao, Bard]

> -----Original Message-----
> From: Pierre-Louis Bossart [mailto:pierre-louis.bossart@linux.intel.com]
> Sent: Friday, January 17, 2020 7:11 PM
> To: Bard liao <yung-chuan.liao@linux.intel.com>; broonie@kernel.org;
> tiwai@suse.de
> Cc: alsa-devel@alsa-project.org; liam.r.girdwood@linux.intel.com;
> kuninori.morimoto.gx@renesas.com; Liao, Bard <bard.liao@intel.com>
> Subject: Re: [alsa-devel] [PATCH RFC v3 2/4] ASoC: Add multiple CPU DAI
> support for PCM ops
> 
> I noticed a couple of code changes, we should probably do a code refactor first
> and add those changes, then add the multi-cpu support.
> 
> > @@ -892,10 +979,17 @@ static int soc_pcm_hw_params(struct
> snd_pcm_substream *substream,
> >   component_err:
> >   	soc_pcm_components_hw_free(substream, component);
> >
> > -	snd_soc_dai_hw_free(cpu_dai, substream);
> > -	cpu_dai->rate = 0;
> > +	i = rtd->num_cpus;
> >
> >   interface_err:
> > +	for_each_rtd_cpu_dai_rollback(rtd, i, cpu_dai) {
> > +		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
> > +			continue;
> 
> maybe this check should be added to the existing code before adding multi-cpu
> support? it looks copy/pasted from the codec case, but is it a miss in the existing
> code?

Thanks Pierre for the review. My point is that we don't test
snd_soc_dai_stream_valid in the existing code since we assume the cpu dai
will support the set of all codec dais. For example, the cpu dai will
support both playback and capture  if a dai link with one cpu and two codecs
dai which support playback and capture separated. However, we may have
two cpus dai which support different directions in multi cpu dai link case.

I do see I miss a snd_soc_dai_stream_valid() test above.

> 
> > +
> > +		snd_soc_dai_hw_free(cpu_dai, substream);
> > +		cpu_dai->rate = 0;
> > +	}
> > +
> 
> [...]
> 
> > @@ -965,7 +1062,12 @@ static int soc_pcm_hw_free(struct
> snd_pcm_substream *substream)
> >   		snd_soc_dai_hw_free(codec_dai, substream);
> >   	}
> >
> > -	snd_soc_dai_hw_free(cpu_dai, substream);
> > +	for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
> > +		if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
> > +			continue;
> > +
> > +		snd_soc_dai_hw_free(cpu_dai, substream);
> > +	}
> 
> same here, the hw_free should be first made conditional on the stream being
> valid, before introducing multi-cpu-dai support?

Or adding multi-cpu-dai support first then checking stream?
The reason is we don't need to test snd_soc_dai_stream_valid if we don't
support multi-cpu-dai

> 
> 
> > @@ -1672,18 +1804,32 @@ static void dpcm_runtime_merge_chan(struct
> snd_pcm_substream *substream,
> >
> >   	for_each_dpcm_be(fe, stream, dpcm) {
> >   		struct snd_soc_pcm_runtime *be = dpcm->be;
> > -		struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
> > +		struct snd_soc_dai_driver *cpu_dai_drv;
> >   		struct snd_soc_dai_driver *codec_dai_drv;
> >   		struct snd_soc_pcm_stream *codec_stream;
> >   		struct snd_soc_pcm_stream *cpu_stream;
> > +		struct snd_soc_dai *dai;
> > +		int i;
> >
> > -		if (stream == SNDRV_PCM_STREAM_PLAYBACK)
> > -			cpu_stream = &cpu_dai_drv->playback;
> > -		else
> > -			cpu_stream = &cpu_dai_drv->capture;
> > +		for_each_rtd_cpu_dai(be, i, dai) {
> > +			/*
> > +			 * Skip CPUs which don't support the current stream
> > +			 * type. See soc_pcm_init_runtime_hw() for more
> details
> > +			 */
> > +			if (!snd_soc_dai_stream_valid(dai, stream))
> > +				continue;
> 
> and here as well, this is a new test that didn't exist before?
> 
> 
> > @@ -2847,23 +3012,33 @@ 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 {
> > +		int stream_playback;
> > +		int stream_capture;
> >   		/* 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;
> > +		if (rtd->dai_link->params) {
> > +			stream_playback = SNDRV_PCM_STREAM_CAPTURE;
> > +			stream_capture  = SNDRV_PCM_STREAM_PLAYBACK;
> > +		} else {
> > +			stream_playback = SNDRV_PCM_STREAM_PLAYBACK;
> > +			stream_capture  = SNDRV_PCM_STREAM_CAPTURE;
> > +		}
> >
> > -		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))
> 
> the logic for this entire block isn't easy to follow, maybe we should
> first move the cpu case out of the codec_dai loop and refactor the code
> before adding the multi-cpu case.

I will try to split the patch.

> 
> > -				playback = 1;
> > -			if (snd_soc_dai_stream_valid(codec_dai,
> SNDRV_PCM_STREAM_CAPTURE) &&
> > -			    snd_soc_dai_stream_valid(cpu_dai,
> SNDRV_PCM_STREAM_CAPTURE))
> > -				capture = 1;
> > +		playback = 1;
> > +		capture = 1;
> > +
> > +		for_each_rtd_cpu_dai(rtd, i, cpu_dai) {
> > +			if (!snd_soc_dai_stream_valid(cpu_dai,
> stream_playback))
> > +				playback = 0;
> > +			if (!snd_soc_dai_stream_valid(cpu_dai,
> stream_capture))
> > +				capture = 0;
> >   		}
> >
> > -		capture = capture && cpu_capture->channels_min;
> > -		playback = playback && cpu_playback->channels_min;
> 
> channels_min is no longer used so it's somewhat confusing if the new
> code is iso-functionality?

channels_min is to check if the stream is valid. It is  replaced by
snd_soc_dai_stream_valid().

> I'd prefer a code refactor that we can double check, then add the
> cpu_dai loop.
> 
> > +		for_each_rtd_codec_dai(rtd, i, codec_dai) {
> > +			if (!snd_soc_dai_stream_valid(codec_dai,
> SNDRV_PCM_STREAM_PLAYBACK))
> > +				playback = 0;
> > +			if (!snd_soc_dai_stream_valid(codec_dai,
> SNDRV_PCM_STREAM_CAPTURE))
> > +				capture = 0;
> > +		}
> >   	}
> >
> >   	if (rtd->dai_link->playback_only) {
> > @@ -2977,7 +3152,7 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd,
> int num)
> >   out:
> >   	dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
> >   		 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
> > -		 cpu_dai->name);
> > +		 (rtd->num_cpus > 1) ? "multicpu" : rtd->cpu_dai->name);
> >   	return ret;
> >   }
> >
> >
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