[PARTIAL PATCH 1/3] ASoC: simple-card: dynamically allocate the DAI link and properties

[PARTIAL PATCH 1/3] ASoC: simple-card: dynamically allocate the DAI link and properties

[Jean-Francois Moine]

The DAI link array and the properties (fmt, sysclk slots) are
hard-coded for a single CPU / CODEC link.

This patch dynamically allocates the DAI link array and the
properties with the aim of supporting many DAI links.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
---
 sound/soc/generic/simple-card.c | 42 ++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 15 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 2ee8ed5..1e865c5 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -20,9 +20,11 @@
 
 struct simple_card_data {
 	struct snd_soc_card snd_card;
-	struct asoc_simple_dai cpu_dai;
-	struct asoc_simple_dai codec_dai;
-	struct snd_soc_dai_link snd_link;
+	struct simple_dai_props {
+		struct asoc_simple_dai cpu_dai;
+		struct asoc_simple_dai codec_dai;
+	} *dai_props;
+	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
 };
 
 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
@@ -70,11 +72,11 @@ static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 	struct snd_soc_dai *cpu = rtd->cpu_dai;
 	int ret;
 
-	ret = __asoc_simple_card_dai_init(codec, &priv->codec_dai);
+	ret = __asoc_simple_card_dai_init(codec, &priv->dai_props->codec_dai);
 	if (ret < 0)
 		return ret;
 
-	ret = __asoc_simple_card_dai_init(cpu, &priv->cpu_dai);
+	ret = __asoc_simple_card_dai_init(cpu, &priv->dai_props->cpu_dai);
 	if (ret < 0)
 		return ret;
 
@@ -151,8 +153,8 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 				     struct device *dev)
 {
 	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
-	struct asoc_simple_dai *codec_dai = &priv->codec_dai;
-	struct asoc_simple_dai *cpu_dai = &priv->cpu_dai;
+	struct asoc_simple_dai *codec_dai = &priv->dai_props->codec_dai;
+	struct asoc_simple_dai *cpu_dai = &priv->dai_props->cpu_dai;
 	struct device_node *np;
 	char *name;
 	unsigned int daifmt;
@@ -284,7 +286,10 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	/* allocate the private data and the DAI link array */
+	priv = devm_kzalloc(dev,
+			sizeof(*priv) + sizeof(*dai_link),
+			GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
@@ -293,10 +298,17 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	 */
 	priv->snd_card.owner = THIS_MODULE;
 	priv->snd_card.dev = dev;
-	dai_link = &priv->snd_link;
+	dai_link = priv->dai_link;
 	priv->snd_card.dai_link = dai_link;
 	priv->snd_card.num_links = 1;
 
+	/* get room for the other properties */
+	priv->dai_props = devm_kzalloc(dev,
+			sizeof(*priv->dai_props),
+			GFP_KERNEL);
+	if (!priv->dai_props)
+		return -ENOMEM;
+
 	if (np && of_device_is_available(np)) {
 
 		ret = asoc_simple_card_parse_of(np, priv, dev);
@@ -330,13 +342,13 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 		dai_link->codec_name	= cinfo->codec;
 		dai_link->cpu_dai_name	= cinfo->cpu_dai.name;
 		dai_link->codec_dai_name = cinfo->codec_dai.name;
-		memcpy(&priv->cpu_dai, &cinfo->cpu_dai,
-						sizeof(priv->cpu_dai));
-		memcpy(&priv->codec_dai, &cinfo->codec_dai,
-						sizeof(priv->codec_dai));
+		memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
+					sizeof(priv->dai_props->cpu_dai));
+		memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
+					sizeof(priv->dai_props->codec_dai));
 
-		priv->cpu_dai.fmt	|= cinfo->daifmt;
-		priv->codec_dai.fmt	|= cinfo->daifmt;
+		priv->dai_props->cpu_dai.fmt	|= cinfo->daifmt;
+		priv->dai_props->codec_dai.fmt	|= cinfo->daifmt;
 	}
 
 	/*
-- 
1.9.1

[PARTIAL PATCH 2/3] ASoC: simple-card: Add DT documentation for multi-DAI links

[Jean-Francois Moine]

Many couples of CPU/CODEC DAI links may be described in the DT
thanks to 'simple-audio-card,dai-link' containers.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
---
 .../devicetree/bindings/sound/simple-card.txt      | 42 +++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index 881914b1..131aa2a 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -23,6 +23,11 @@ Optional properties:
 
 Required subnodes:
 
+- simple-audio-card,dai-link		: container for the CPU and CODEC sub-nodes
+					  This container may be omitted when the
+					  card has only one DAI link.
+					  See the examples.
+
 - simple-audio-card,cpu			: CPU   sub-node
 - simple-audio-card,codec		: CODEC sub-node
 
@@ -49,7 +54,7 @@ Note:
    CPU and CODEC sides as we need to keep the settings identical for both ends
    of the link.
 
-Example:
+Example 1 - single DAI link:
 
 sound {
 	compatible = "simple-audio-card";
@@ -94,3 +99,38 @@ sh_fsi2: sh_fsi2@ec230000 {
 	interrupt-parent = <&gic>;
 	interrupts = <0 146 0x4>;
 };
+
+Example 2 - many DAI links:
+
+sound {
+	compatible = "simple-audio-card";
+	simple-audio-card,name = "Cubox Audio";
+	simple-audio-card,format = "i2s";
+
+	simple-audio-card,dai-link@0 {		/* I2S - HDMI */
+		simple-audio-card,cpu {
+			sound-dai = <&audio1 0>;
+		};
+		simple-audio-card,codec {
+			sound-dai = <&tda998x 0>;
+		};
+	};
+
+	simple-audio-card,dai-link@1 {		/* S/PDIF - HDMI */
+		simple-audio-card,cpu {
+			sound-dai = <&audio1 1>;
+		};
+		simple-audio-card,codec {
+			sound-dai = <&tda998x 1>;
+		};
+	};
+
+	simple-audio-card,dai-link@2 {		/* S/PDIF - S/PDIF */
+		simple-audio-card,cpu {
+			sound-dai = <&audio1 1>;
+		};
+		simple-audio-card,codec {
+			sound-dai = <&spdif_codec>;
+		};
+	};
+};
-- 
1.9.1

[PARTIAL PATCH 3/3] ASoC: simple-card: Handle many DAI links

[Jean-Francois Moine]

Some simple audio cards may have many DAI links.
This patch extends the simple-card driver for handling such cards.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
---
 sound/soc/generic/simple-card.c | 190 +++++++++++++++++++++++++---------------
 1 file changed, 121 insertions(+), 69 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 1e865c5..21f1ccb 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -70,13 +70,16 @@ static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 				snd_soc_card_get_drvdata(rtd->card);
 	struct snd_soc_dai *codec = rtd->codec_dai;
 	struct snd_soc_dai *cpu = rtd->cpu_dai;
-	int ret;
+	struct simple_dai_props *dai_props;
+	int num, ret;
 
-	ret = __asoc_simple_card_dai_init(codec, &priv->dai_props->codec_dai);
+	num = rtd - rtd->card->rtd;
+	dai_props = &priv->dai_props[num];
+	ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
 	if (ret < 0)
 		return ret;
 
-	ret = __asoc_simple_card_dai_init(cpu, &priv->dai_props->cpu_dai);
+	ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
 	if (ret < 0)
 		return ret;
 
@@ -148,13 +151,47 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
 	return 0;
 }
 
+static int simple_card_cpu_codec_of(struct device_node *node,
+				int daifmt,
+				struct snd_soc_dai_link *dai_link,
+				struct simple_dai_props *dai_props)
+{
+	struct device_node *np;
+	int ret;
+
+	/* CPU sub-node */
+	ret = -EINVAL;
+	np = of_get_child_by_name(node, "simple-audio-card,cpu");
+	if (np) {
+		ret = asoc_simple_card_sub_parse_of(np, daifmt,
+						&dai_props->cpu_dai,
+						&dai_link->cpu_of_node,
+						&dai_link->cpu_dai_name);
+		of_node_put(np);
+	}
+	if (ret < 0)
+		return ret;
+
+	/* CODEC sub-node */
+	ret = -EINVAL;
+	np = of_get_child_by_name(node, "simple-audio-card,codec");
+	if (np) {
+		ret = asoc_simple_card_sub_parse_of(np, daifmt,
+						&dai_props->codec_dai,
+						&dai_link->codec_of_node,
+						&dai_link->codec_dai_name);
+		of_node_put(np);
+	}
+	return ret;
+}
+
 static int asoc_simple_card_parse_of(struct device_node *node,
 				     struct simple_card_data *priv,
-				     struct device *dev)
+				     struct device *dev,
+				     int multi)
 {
 	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
-	struct asoc_simple_dai *codec_dai = &priv->dai_props->codec_dai;
-	struct asoc_simple_dai *cpu_dai = &priv->dai_props->cpu_dai;
+	struct simple_dai_props *dai_props = priv->dai_props;
 	struct device_node *np;
 	char *name;
 	unsigned int daifmt;
@@ -183,78 +220,71 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 			return ret;
 	}
 
-	/* CPU sub-node */
-	ret = -EINVAL;
-	np = of_get_child_by_name(node, "simple-audio-card,cpu");
-	if (np) {
-		ret = asoc_simple_card_sub_parse_of(np, daifmt,
-						  cpu_dai,
-						  &dai_link->cpu_of_node,
-						  &dai_link->cpu_dai_name);
-		of_node_put(np);
-	}
-	if (ret < 0)
-		return ret;
+	/* loop on the DAI links */
+	np = NULL;
+	for (;;) {
+		if (multi) {
+			np = of_get_next_child(node, np);
+			if (!np)
+				break;
+		}
 
-	/* CODEC sub-node */
-	ret = -EINVAL;
-	np = of_get_child_by_name(node, "simple-audio-card,codec");
-	if (np) {
-		ret = asoc_simple_card_sub_parse_of(np, daifmt,
-						  codec_dai,
-						  &dai_link->codec_of_node,
-						  &dai_link->codec_dai_name);
-		of_node_put(np);
-	}
-	if (ret < 0)
-		return ret;
+		ret = simple_card_cpu_codec_of(multi ? np : node,
+					daifmt, dai_link, dai_props);
+		if (ret < 0)
+			goto err;
 
-	/*
-	 * overwrite cpu_dai->fmt as its DAIFMT_MASTER bit is based on CODEC
-	 * while the other bits should be identical unless buggy SW/HW design.
-	 */
-	cpu_dai->fmt = codec_dai->fmt;
+		/*
+		 * overwrite cpu_dai->fmt as its DAIFMT_MASTER bit is based on CODEC
+		 * while the other bits should be identical unless buggy SW/HW design.
+		 */
+		dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt;
+
+		if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
+			ret = -EINVAL;
+			goto err;
+		}
+
+		/* simple-card assumes platform == cpu */
+		dai_link->platform_of_node = dai_link->cpu_of_node;
 
-	if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name)
-		return -EINVAL;
+		name = devm_kzalloc(dev,
+				    strlen(dai_link->cpu_dai_name)   +
+				    strlen(dai_link->codec_dai_name) + 2,
+				    GFP_KERNEL);
+		sprintf(name, "%s-%s", dai_link->cpu_dai_name,
+					dai_link->codec_dai_name);
+		dai_link->name = dai_link->stream_name = name;
+
+		if (!multi)
+			break;
+
+		dai_link++;
+		dai_props++;
+	}
 
 	/* card name is created from CPU/CODEC dai name */
-	name = devm_kzalloc(dev,
-			    strlen(dai_link->cpu_dai_name)   +
-			    strlen(dai_link->codec_dai_name) + 2,
-			    GFP_KERNEL);
-	sprintf(name, "%s-%s", dai_link->cpu_dai_name,
-				dai_link->codec_dai_name);
+	dai_link = priv->snd_card.dai_link;
 	if (!priv->snd_card.name)
-		priv->snd_card.name = name;
-	dai_link->name = dai_link->stream_name = name;
-
-	/* simple-card assumes platform == cpu */
-	dai_link->platform_of_node = dai_link->cpu_of_node;
+		priv->snd_card.name = dai_link->name;
 
-	dev_dbg(dev, "card-name : %s\n", name);
+	dev_dbg(dev, "card-name : %s\n", priv->snd_card.name);
 	dev_dbg(dev, "platform : %04x\n", daifmt);
+	dai_props = priv->dai_props;
 	dev_dbg(dev, "cpu : %s / %04x / %d\n",
 		dai_link->cpu_dai_name,
-		cpu_dai->fmt,
-		cpu_dai->sysclk);
+		dai_props->cpu_dai.fmt,
+		dai_props->cpu_dai.sysclk);
 	dev_dbg(dev, "codec : %s / %04x / %d\n",
 		dai_link->codec_dai_name,
-		codec_dai->fmt,
-		codec_dai->sysclk);
-
-	/*
-	 * soc_bind_dai_link() will check cpu name
-	 * after of_node matching if dai_link has cpu_dai_name.
-	 * but, it will never match if name was created by fmt_single_name()
-	 * remove cpu_dai_name to escape name matching.
-	 * see
-	 *	fmt_single_name()
-	 *	fmt_multiple_name()
-	 */
-	dai_link->cpu_dai_name = NULL;
+		dai_props->codec_dai.fmt,
+		dai_props->codec_dai.sysclk);
 
 	return 0;
+
+err:
+	of_node_put(np);
+	return ret;
 }
 
 /* update the reference count of the devices nodes at end of probe */
@@ -284,11 +314,20 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	struct snd_soc_dai_link *dai_link;
 	struct device_node *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
-	int ret;
+	int num_links, multi, ret;
+
+	/* get the number of DAI links */
+	if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
+		num_links = of_get_child_count(np);
+		multi = 1;
+	} else {
+		num_links = 1;
+		multi = 0;
+	}
 
 	/* allocate the private data and the DAI link array */
 	priv = devm_kzalloc(dev,
-			sizeof(*priv) + sizeof(*dai_link),
+			sizeof(*priv) + sizeof(*dai_link) * num_links,
 			GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
@@ -300,23 +339,36 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	priv->snd_card.dev = dev;
 	dai_link = priv->dai_link;
 	priv->snd_card.dai_link = dai_link;
-	priv->snd_card.num_links = 1;
+	priv->snd_card.num_links = num_links;
 
 	/* get room for the other properties */
 	priv->dai_props = devm_kzalloc(dev,
-			sizeof(*priv->dai_props),
+			sizeof(*priv->dai_props) * num_links,
 			GFP_KERNEL);
 	if (!priv->dai_props)
 		return -ENOMEM;
 
 	if (np && of_device_is_available(np)) {
 
-		ret = asoc_simple_card_parse_of(np, priv, dev);
+		ret = asoc_simple_card_parse_of(np, priv, dev, multi);
 		if (ret < 0) {
 			if (ret != -EPROBE_DEFER)
 				dev_err(dev, "parse error %d\n", ret);
 			goto err;
 		}
+
+		/*
+		 * soc_bind_dai_link() will check cpu name
+		 * after of_node matching if dai_link has cpu_dai_name.
+		 * but, it will never match if name was created by fmt_single_name()
+		 * remove cpu_dai_name to escape name matching.
+		 * see
+		 *	fmt_single_name()
+		 *	fmt_multiple_name()
+		 */
+		if (num_links == 1)
+			dai_link->cpu_dai_name = NULL;
+
 	} else {
 		struct asoc_simple_card_info *cinfo;
 
-- 
1.9.1

[PARTIAL PATCH 0/3] ASoC: simple-card: multi DAI links extension

[Jean-Francois Moine]

This patch series extends the simple card driver to handle
many DAI links as this exists in the Cubox audio subsystem.

** this is a partial patch **

Jyri, is this OK as a base for you?

- partial patch
	- remove 'simple-card: Simplify code'
		which is applied (Mark Brown)
	- add a DAI link container in the DT

- v3
	- remove 'Fix the reference count of device nodes'
		which is applied (Mark Brown)
	- new patch 'Simplify code'
	- dynamically allocate and use properties for all DAI links
		(Jyri Sarha and Li Xiubo)
- v2
	- change subject/comment about device node reference count
		(Mark Brown)
	- use a null size array instead of an implicit area for the DAI links
		(Li Xiubo)
	- update the reference count of the device node at end of probe

Jean-Francois Moine (3):
  ASoC: simple-card: dynamically allocate the DAI link and properties
  ASoC: simple-card: Add DT documentation for multi-DAI links
  ASoC: simple-card: Handle many DAI links

 .../devicetree/bindings/sound/simple-card.txt      |  42 +++-
 sound/soc/generic/simple-card.c                    | 220 +++++++++++++--------
 2 files changed, 183 insertions(+), 79 deletions(-)

-- 
1.9.1

Re: [PARTIAL PATCH 0/3] ASoC: simple-card: multi DAI links extension

[Jyri Sarha]

On 03/20/2014 12:55 PM, Jean-Francois Moine wrote:
> This patch series extends the simple card driver to handle
> many DAI links as this exists in the Cubox audio subsystem.
>
> ** this is a partial patch **
>
> Jyri, is this OK as a base for you?
>

Yes, thanks! This looks like good step forward.

I think I can continue from here.


Best regards,
Jyri

Re: [PARTIAL PATCH 0/3] ASoC: simple-card: multi DAI links extension

[Mark Brown]

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On Thu, Mar 20, 2014 at 11:55:25AM +0100, Jean-Francois Moine wrote:
> This patch series extends the simple card driver to handle
> many DAI links as this exists in the Cubox audio subsystem.

Applied all, thanks.

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