[PATCH 0/8] ASoC: simple-card: DPCM support

[PATCH 0/8] ASoC: simple-card: DPCM support

[Kuninori Morimoto]

Hi Mark

These patches are DPCM support for simple-card,
and milestone is (*)

	* 1. simple DPCM support on DT
	  2. sampling rate convert support on DPCM
	  3. multi FE/BE support on DT
	  4. rsnd multi block IP use multi DPCM

1) - 4) are tidyup patches of simple-card
5) adds DPCM support on simple-card
6) tidyups asoc_simple_card_sub_parse_of() (based on 5)
7) is requred DPCM on Renesas R-Car driver
8) is DT support on dummy driver

5) and 8) are main patch for DPCM on simple-card.

I'm still not 100% understand about DPCM, but 8) patch was needed
to DPCM FE/BE route, but is it wrong solution ?

About 5) patch,
I know Lars-Peter pointed DT idea for DPCM via
     http://lxr.free-electrons.com/source/Documentation/devicetree/bindings/media/video-interfaces.txt
My 5) patch used this idea, but, not 100%.
Because DPCM can use multi FE-BE connection (?)
So, it is just pointing BE endpoint via "remote".

	/* FrontEnd */
	simple-audio-card,dai-link@0 {

		remote = <&endpoint>;

		cpu { ...  };
		codec { ... };
	};

	/* BackEnd */
	endpoint: simple-audio-card,dai-link@1 {

		cpu { ... };
		codec { ... };
	};

We can list many DAI in future ?

	remote = <&endpoint0, &endpoint1, &endpoint2>;


Kuninori Morimoto (8):
  1) ASoC: simple-card: use asoc_simple_xxx prefix
  2) ASoC: simple-card: remove dai_link->cpu_dai_name when DT
  3) ASoC: simple-card: dai_link->init should be cared when multi DAI
  4) ASoC: simple-card: use common for_each_child_of_node() for loop
  5) ASoC: simple-card: add DPCM support when DT case
  6) ASoC: simple-card: remove is_top_level_node from asoc_simple_card_sub_parse_of()
  7) ASoC: rsnd: add dai_link stream name
  8) ASoC: add snd-soc-dummy DT support

 .../devicetree/bindings/sound/simple-card.txt      |   35 +++++++++
 .../devicetree/bindings/sound/snd-soc-dummy        |   13 +++
 sound/soc/generic/simple-card.c                    |   83 +++++++++++++-------
 sound/soc/sh/rcar/core.c                           |    8 ++
 sound/soc/sh/rcar/rsnd.h                           |    1 +
 sound/soc/soc-utils.c                              |   12 ++-
 6 files changed, 120 insertions(+), 32 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/sound/snd-soc-dummy

-- 
1.7.9.5



Best regards
---
Kuninori Morimoto
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[PATCH 1/8] ASoC: simple-card: use asoc_simple_xxx prefix

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

simple-card driver is using asoc_simple_xxx() prefix.
simple_card_dai_link_of() should be
asoc_simple_card_dai_link_of().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/generic/simple-card.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 159e517f..f60c68d 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -163,11 +163,11 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
 	return 0;
 }
 
-static int simple_card_dai_link_of(struct device_node *node,
-				   struct device *dev,
-				   struct snd_soc_dai_link *dai_link,
-				   struct simple_dai_props *dai_props,
-				   bool is_top_level_node)
+static int asoc_simple_card_dai_link_of(struct device_node *node,
+					struct device *dev,
+					struct snd_soc_dai_link *dai_link,
+					struct simple_dai_props *dai_props,
+					bool is_top_level_node)
 {
 	struct device_node *np = NULL;
 	struct device_node *bitclkmaster = NULL;
@@ -337,16 +337,18 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 		int i;
 		for (i = 0; (np = of_get_next_child(node, np)); i++) {
 			dev_dbg(dev, "\tlink %d:\n", i);
-			ret = simple_card_dai_link_of(np, dev, dai_link + i,
-						      dai_props + i, false);
+			ret = asoc_simple_card_dai_link_of(np, dev,
+							   dai_link + i,
+							   dai_props + i,
+							   false);
 			if (ret < 0) {
 				of_node_put(np);
 				return ret;
 			}
 		}
 	} else {
-		ret = simple_card_dai_link_of(node, dev, dai_link, dai_props,
-					      true);
+		ret = asoc_simple_card_dai_link_of(node, dev,
+						   dai_link, dai_props, true);
 		if (ret < 0)
 			return ret;
 	}
-- 
1.7.9.5

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[PATCH 2/8] ASoC: simple-card: remove dai_link->cpu_dai_name when DT

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

f687d900d30a61dda38db2a99239f5284a86a309
(ASoC: simple-card: cpu_dai_name creates confusion when DT case)
removed dai_link->cpu_dai_name when DT case,
since it uses DT phand in soc_bind_dai_link().
This binding will fail if it has cpu_dai_name.

6a91a17bd7b92b2d2aa9ece85457f52a62fd7708
(ASoC: simple-card: Handle many DAI links)
added multi DAI link support to simple-card driver.
Then, removing cpu_dai_name was cared only single DAI.
But, it is needed in all DT cases.
This patch moves it to asoc_simple_card_dai_link_of()
so that care about all DAIs.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/generic/simple-card.c |   23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index f60c68d..b2ca545 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -285,6 +285,17 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 		dai_props->codec_dai.fmt,
 		dai_props->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_link_of_err:
 	if (np)
 		of_node_put(np);
@@ -429,18 +440,6 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 			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;
 
-- 
1.7.9.5

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[PATCH 3/8] ASoC: simple-card: dai_link->init should be cared when multi DAI

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

6a91a17bd7b92b2d2aa9ece85457f52a62fd7708
(ASoC: simple-card: Handle many DAI links)
added multi DAI support on simple-card.
This means priv->dai_link might be pointer of multi DAI.
dai_link->init is needed for all DAI.
This patch cares it for all DAIs on DT/non-DT

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/generic/simple-card.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index b2ca545..de6e631 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -274,6 +274,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 				dai_link->codec_dai_name);
 	dai_link->name = dai_link->stream_name = name;
 	dai_link->ops = &asoc_simple_card_ops;
+	dai_link->init = asoc_simple_card_dai_init;
 
 	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
@@ -465,6 +466,7 @@ 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;
+		dai_link->init		= asoc_simple_card_dai_init;
 		memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 					sizeof(priv->dai_props->cpu_dai));
 		memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
@@ -474,11 +476,6 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 		priv->dai_props->codec_dai.fmt	|= cinfo->daifmt;
 	}
 
-	/*
-	 * init snd_soc_dai_link
-	 */
-	dai_link->init = asoc_simple_card_dai_init;
-
 	snd_soc_card_set_drvdata(&priv->snd_card, priv);
 
 	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
-- 
1.7.9.5

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[PATCH 4/8] ASoC: simple-card: use common for_each_child_of_node() for loop

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/generic/simple-card.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index de6e631..60d277a 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -346,8 +346,9 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 
 	if (multi) {
 		struct device_node *np = NULL;
-		int i;
-		for (i = 0; (np = of_get_next_child(node, np)); i++) {
+		int i = 0;
+
+		for_each_child_of_node(node, np) {
 			dev_dbg(dev, "\tlink %d:\n", i);
 			ret = asoc_simple_card_dai_link_of(np, dev,
 							   dai_link + i,
@@ -357,6 +358,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 				of_node_put(np);
 				return ret;
 			}
+			i++;
 		}
 	} else {
 		ret = asoc_simple_card_dai_link_of(node, dev,
-- 
1.7.9.5

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[PATCH 5/8] ASoC: simple-card: add DPCM support when DT case

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

This patch adds DPCM support on simple-card when DT case

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 .../devicetree/bindings/sound/simple-card.txt      |   35 ++++++++++++++++++++
 sound/soc/generic/simple-card.c                    |   33 ++++++++++++++++--
 2 files changed, 65 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index c2e9841..60ce432 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -51,6 +51,8 @@ Optional dai-link subnode properties:
 					  dai-link uses bit clock inversion.
 - frame-inversion			: bool property. Add this if the
 					  dai-link uses frame clock inversion.
+- remote				: DPCM phandle to backend DAI entry.
+					  and this DAI will be frontend entry.
 
 For backward compatibility the frame-master and bitclock-master
 properties can be used as booleans in codec subnode to indicate if the
@@ -149,3 +151,36 @@ sound {
 		};
 	};
 };
+
+Example 3 - DPCM:
+
+sound {
+	compatible = "simple-audio-card";
+
+	/* Front End <-> Back End route */
+	simple-audio-card,routing =
+		"yyy Playback", "xxx Playback",
+		"xxx Capture",  "yyy Capture";
+
+	simple-audio-card,dai-link@0 {		/* Front End */
+		...
+		remote = <&backend>;
+
+		cpu {
+			sound-dai = <xxx>;
+		};
+		codec {
+			sound-dai = <xxx>;
+		};
+	};
+
+	backend: simple-audio-card,dai-link@1 {	/* Back End */
+		...
+		cpu {
+			sound-dai = <yyy>;
+		};
+		codec {
+			sound-dai = <yyy>;
+		};
+	};
+};
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 60d277a..9481e70 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -163,7 +163,8 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
 	return 0;
 }
 
-static int asoc_simple_card_dai_link_of(struct device_node *node,
+static int asoc_simple_card_dai_link_of(struct device_node *parent_node,
+					struct device_node *node,
 					struct device *dev,
 					struct snd_soc_dai_link *dai_link,
 					struct simple_dai_props *dai_props,
@@ -276,6 +277,32 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 	dai_link->ops = &asoc_simple_card_ops;
 	dai_link->init = asoc_simple_card_dai_init;
 
+	/* For DPCM */
+	if (parent_node) {
+		struct device_node *e;
+		struct device_node *h;
+
+		for_each_child_of_node(parent_node, e) {
+			h = of_parse_phandle(e, "remote", 0);
+			if (!h)
+				continue;
+
+			/* Front End */
+			if (e == node) {
+				dai_link->dynamic	= 1;
+				dai_link->dpcm_playback	= 1; /* FIXME */
+				dai_link->dpcm_capture	= 1; /* FIXME */
+			}
+
+			/* Back End */
+			if (h == node) {
+				dai_link->no_pcm	= 1;
+				dai_link->dpcm_playback	= 1; /* FIXME */
+				dai_link->dpcm_capture	= 1; /* FIXME */
+			}
+		}
+	}
+
 	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
 		dai_link->cpu_dai_name,
@@ -350,7 +377,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 
 		for_each_child_of_node(node, np) {
 			dev_dbg(dev, "\tlink %d:\n", i);
-			ret = asoc_simple_card_dai_link_of(np, dev,
+			ret = asoc_simple_card_dai_link_of(node, np, dev,
 							   dai_link + i,
 							   dai_props + i,
 							   false);
@@ -361,7 +388,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 			i++;
 		}
 	} else {
-		ret = asoc_simple_card_dai_link_of(node, dev,
+		ret = asoc_simple_card_dai_link_of(NULL, node, dev,
 						   dai_link, dai_props, true);
 		if (ret < 0)
 			return ret;
-- 
1.7.9.5

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[PATCH 6/8] ASoC: simple-card: remove is_top_level_node from asoc_simple_card_sub_parse_of()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

asoc_simple_card_sub_parse_of() has parent_node.
We can use it instead of is_top_level_node.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/generic/simple-card.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 9481e70..d3aa472 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -167,8 +167,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *parent_node,
 					struct device_node *node,
 					struct device *dev,
 					struct snd_soc_dai_link *dai_link,
-					struct simple_dai_props *dai_props,
-					bool is_top_level_node)
+					struct simple_dai_props *dai_props)
 {
 	struct device_node *np = NULL;
 	struct device_node *bitclkmaster = NULL;
@@ -179,7 +178,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *parent_node,
 	char *prefix = "";
 	int ret;
 
-	if (is_top_level_node)
+	if (!parent_node)
 		prefix = "simple-audio-card,";
 
 	daifmt = snd_soc_of_parse_daifmt(node, prefix,
@@ -379,8 +378,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 			dev_dbg(dev, "\tlink %d:\n", i);
 			ret = asoc_simple_card_dai_link_of(node, np, dev,
 							   dai_link + i,
-							   dai_props + i,
-							   false);
+							   dai_props + i);
 			if (ret < 0) {
 				of_node_put(np);
 				return ret;
@@ -389,7 +387,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 		}
 	} else {
 		ret = asoc_simple_card_dai_link_of(NULL, node, dev,
-						   dai_link, dai_props, true);
+						   dai_link, dai_props);
 		if (ret < 0)
 			return ret;
 	}
-- 
1.7.9.5

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[PATCH 7/8] ASoC: rsnd: add dai_link stream name

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

This patch adds missing dai_link stream_name
which is used when DPCM

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/sh/rcar/core.c |    8 ++++++++
 sound/soc/sh/rcar/rsnd.h |    1 +
 2 files changed, 9 insertions(+)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 1922ec5..d25b2d7 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -854,19 +854,27 @@ static int rsnd_dai_probe(struct platform_device *pdev,
 		drv[i].name	= rdai[i].name;
 		drv[i].ops	= &rsnd_soc_dai_ops;
 		if (pmod) {
+			snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
+				 "DAI%d Playback", i);
+
 			drv[i].playback.rates		= RSND_RATES;
 			drv[i].playback.formats		= RSND_FMTS;
 			drv[i].playback.channels_min	= 2;
 			drv[i].playback.channels_max	= 2;
+			drv[i].playback.stream_name	= rdai[i].playback.name;
 
 			rdai[i].playback.info = &info->dai_info[i].playback;
 			rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 		}
 		if (cmod) {
+			snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
+				 "DAI%d Capture", i);
+
 			drv[i].capture.rates		= RSND_RATES;
 			drv[i].capture.formats		= RSND_FMTS;
 			drv[i].capture.channels_min	= 2;
 			drv[i].capture.channels_max	= 2;
+			drv[i].capture.stream_name	= rdai[i].capture.name;
 
 			rdai[i].capture.info = &info->dai_info[i].capture;
 			rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index d119adf..56b93a0 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -231,6 +231,7 @@ char *rsnd_mod_dma_name(struct rsnd_mod *mod);
  */
 #define RSND_DAI_NAME_SIZE	16
 struct rsnd_dai_stream {
+	char name[RSND_DAI_NAME_SIZE];
 	struct snd_pcm_substream *substream;
 	struct rsnd_mod *mod[RSND_MOD_MAX];
 	struct rsnd_dai_path_info *info; /* rcar_snd.h */
-- 
1.7.9.5

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[PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

This patch adds snd-soc-dummy DT binding support.
It removes .stream_name from dummy_dai,
because "Playback" / "Capture" is very popular naming.

The DAPM will lost correct route settings
if other CPU/Codec was using same stream name.
And it will be problem when DPCM case.
Like below

FE CPU   (rsnd):   "DAI0 Playback"
   Codec (dummy):  "Playback"

BE CPU   (dummy):  "Playback"
   Codec (ak4642): "Playback"

simple-audio-card,routing = "Playback", "DAI0 Playback";

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 .../devicetree/bindings/sound/snd-soc-dummy        |   13 +++++++++++++
 sound/soc/soc-utils.c                              |   12 +++++++++---
 2 files changed, 22 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/sound/snd-soc-dummy

diff --git a/Documentation/devicetree/bindings/sound/snd-soc-dummy b/Documentation/devicetree/bindings/sound/snd-soc-dummy
new file mode 100644
index 0000000..ea3fe0c
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/snd-soc-dummy
@@ -0,0 +1,13 @@
+snd-soc-dummy:
+
+ALSA SoC dummy codec.
+
+Required properties:
+
+  - compatible : "alsa-soc-dummy"
+
+Example:
+
+sound_dummy {
+	compatible = "alsa-soc-dummy";
+};
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index 7f22ca3..df11010 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -12,7 +12,8 @@
  *  Free Software Foundation;  either version 2 of the  License, or (at your
  *  option) any later version.
  */
-
+#include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/export.h>
 #include <sound/core.h>
@@ -104,14 +105,12 @@ static struct snd_soc_codec_driver dummy_codec;
 static struct snd_soc_dai_driver dummy_dai = {
 	.name = "snd-soc-dummy-dai",
 	.playback = {
-		.stream_name	= "Playback",
 		.channels_min	= 1,
 		.channels_max	= 384,
 		.rates		= STUB_RATES,
 		.formats	= STUB_FORMATS,
 	},
 	.capture = {
-		.stream_name	= "Capture",
 		.channels_min	= 1,
 		.channels_max	= 384,
 		.rates = STUB_RATES,
@@ -151,10 +150,17 @@ static int snd_soc_dummy_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static struct of_device_id soc_dummy_of_match[] = {
+	{ .compatible = "alsa-soc-dummy" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, soc_dummy_of_match);
+
 static struct platform_driver soc_dummy_driver = {
 	.driver = {
 		.name = "snd-soc-dummy",
 		.owner = THIS_MODULE,
+		.of_match_table = soc_dummy_of_match,
 	},
 	.probe = snd_soc_dummy_probe,
 	.remove = snd_soc_dummy_remove,
-- 
1.7.9.5

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Lars-Peter Clausen]

On 08/20/2014 09:13 AM, Kuninori Morimoto wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
>
> This patch adds snd-soc-dummy DT binding support.

The devicetree describes the hardware, the snd-soc-dummy is a software only 
thing and should not be found in the devicetree.

> It removes .stream_name from dummy_dai,
> because "Playback" / "Capture" is very popular naming.
>
> The DAPM will lost correct route settings
> if other CPU/Codec was using same stream name.
> And it will be problem when DPCM case.
> Like below
>
> FE CPU   (rsnd):   "DAI0 Playback"
>     Codec (dummy):  "Playback"
>
> BE CPU   (dummy):  "Playback"
>     Codec (ak4642): "Playback"


That's something we need to fix, but I don't think removing the stream names 
is the right way to do this. In a multi CODEC environment you'll quite 
likely end up with widgets of the same name. Ideally a route endpoint would 
be expressed by a tuple of DT node and pin name. But I don't think it is 
possible to mix integer and string elements in a property.
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Lars

Thank you for your feedback

> > This patch adds snd-soc-dummy DT binding support.
> 
> The devicetree describes the hardware, the snd-soc-dummy is a software only 
> thing and should not be found in the devicetree.

Hmm... indeed
OK. I will re-consider about this

> > FE CPU   (rsnd):   "DAI0 Playback"
> >     Codec (dummy):  "Playback"
> >
> > BE CPU   (dummy):  "Playback"
> >     Codec (ak4642): "Playback"
> 
> 
> That's something we need to fix, but I don't think removing the stream names 
> is the right way to do this. In a multi CODEC environment you'll quite 
> likely end up with widgets of the same name. Ideally a route endpoint would 
> be expressed by a tuple of DT node and pin name. But I don't think it is 
> possible to mix integer and string elements in a property.

Thank you for your advice.
"DT node and name" seems nice idea, but it works on DT case only ?
Anyway, I re-consider about this too.
It can be trial and error...

Best regards
---
Kuninori Morimoto
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 1095 bytes --]

On Mon, Aug 25, 2014 at 05:04:20PM -0700, Kuninori Morimoto wrote:

> > That's something we need to fix, but I don't think removing the stream names 
> > is the right way to do this. In a multi CODEC environment you'll quite 
> > likely end up with widgets of the same name. Ideally a route endpoint would 
> > be expressed by a tuple of DT node and pin name. But I don't think it is 
> > possible to mix integer and string elements in a property.

It's not.  Now that we have preprocessor support it's a lot easier to
just use numbers though - the legibility problems from just using raw
numbers in big tables don't apply so much any more.

> Thank you for your advice.
> "DT node and name" seems nice idea, but it works on DT case only ?
> Anyway, I re-consider about this too.
> It can be trial and error...

I think that for hardware which has fairly monolithic audio blocks using
DPCM it might be worth thinking about providing a way for the DT to look
like the DT for a simple I2S DAI with the driver for the IP in the SoC
filling in all the structure needed by DPCM.

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Mark, Lars

> > > That's something we need to fix, but I don't think removing the stream names 
> > > is the right way to do this. In a multi CODEC environment you'll quite 
> > > likely end up with widgets of the same name. Ideally a route endpoint would 
> > > be expressed by a tuple of DT node and pin name. But I don't think it is 
> > > possible to mix integer and string elements in a property.
> 
> It's not.  Now that we have preprocessor support it's a lot easier to
> just use numbers though - the legibility problems from just using raw
> numbers in big tables don't apply so much any more.
> 
> > Thank you for your advice.
> > "DT node and name" seems nice idea, but it works on DT case only ?
> > Anyway, I re-consider about this too.
> > It can be trial and error...
> 
> I think that for hardware which has fairly monolithic audio blocks using
> DPCM it might be worth thinking about providing a way for the DT to look
> like the DT for a simple I2S DAI with the driver for the IP in the SoC
> filling in all the structure needed by DPCM.

I expended route setting method like below, but what do you think ? 
I guess it can use not only DT case, and it is readable ?


--------------------------
Subject: [PATCH] ASoC: dapm: enable DAI name on DAPM route

DAPM route setting is using name matching.
but, it can't match correctly if codec/platform
driver have same name.
This can be very serious issue on DAPM.

    FE CPU   (ec500000.rcar_sound): "DAI0 Playback"
       Codec (snd-soc-dummy-dai):   "Playback"

    BE CPU   (snd-soc-dummy-dai):   "Playback"
       Codec (ak4642-hifi):         "Playback"

This patch expand route setting by using DAI name.
You can select "ak4642-hifi" side "Playback" by below.

DT
	simple-audio-card,routing =
		"ak4642-hifi Playback", "DAI0 Playback";

non DT
	struct snd_soc_dapm_route route[] = {
		{ "ak4642-hifi Playback", NULL, "DAI0 Playback"},
	}

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 sound/soc/soc-dapm.c |   47 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index b24f70a..084f15b 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2395,6 +2395,30 @@ err:
 	return ret;
 }
 
+static void snd_soc_dapm_route_scan(struct snd_soc_dapm_widget *w,
+				    struct snd_soc_dapm_widget **wsource,
+				    struct snd_soc_dapm_widget **wsink,
+				    struct snd_soc_dapm_widget **wtsource,
+				    struct snd_soc_dapm_widget **wtsink,
+				    struct snd_soc_dapm_context *dapm,
+				    const char *sink,
+				    const char *source,
+				    const char *name)
+{
+	if (!*wsink && !(strcmp(name, sink))) {
+		*wtsink = w;
+		if (w->dapm == dapm)
+			*wsink = w;
+		return;
+	}
+
+	if (!*wsource && !(strcmp(name, source))) {
+		*wtsource = w;
+		if (w->dapm == dapm)
+			*wsource = w;
+	}
+}
+
 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
 				  const struct snd_soc_dapm_route *route)
 {
@@ -2425,17 +2449,20 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
 	 * current DAPM context
 	 */
 	list_for_each_entry(w, &dapm->card->widgets, list) {
-		if (!wsink && !(strcmp(w->name, sink))) {
-			wtsink = w;
-			if (w->dapm == dapm)
-				wsink = w;
-			continue;
-		}
-		if (!wsource && !(strcmp(w->name, source))) {
-			wtsource = w;
-			if (w->dapm == dapm)
-				wsource = w;
+		if (w->dai) {
+			char w_name[80];
+
+			snprintf(w_name, sizeof(w_name), "%s %s",
+				 w->dai->name, w->name);
+
+			snd_soc_dapm_route_scan(w, &wsource, &wsink,
+						&wtsource, &wtsink, dapm,
+						sink, source, w_name);
 		}
+
+		snd_soc_dapm_route_scan(w, &wsource, &wsink,
+					&wtsource, &wtsink, dapm,
+					sink, source, w->name);
 	}
 	/* use widget from another DAPM context if not found from this */
 	if (!wsink)


Best regards
---
Kuninori Morimoto
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 513 bytes --]

On Tue, Aug 26, 2014 at 01:34:21AM -0700, Kuninori Morimoto wrote:

> This patch expand route setting by using DAI name.
> You can select "ak4642-hifi" side "Playback" by below.

> DT
> 	simple-audio-card,routing =
> 		"ak4642-hifi Playback", "DAI0 Playback";

> non DT
> 	struct snd_soc_dapm_route route[] = {
> 		{ "ak4642-hifi Playback", NULL, "DAI0 Playback"},
> 	}

If we're already specifying the DAI links for the (D)PCM code it seems
like we shouldn't also have to put DAPM routes for them in DT as well.

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Lars-Peter Clausen]

On 08/26/2014 11:11 AM, Mark Brown wrote:
> On Tue, Aug 26, 2014 at 01:34:21AM -0700, Kuninori Morimoto wrote:
>
>> This patch expand route setting by using DAI name.
>> You can select "ak4642-hifi" side "Playback" by below.
>
>> DT
>> 	simple-audio-card,routing =
>> 		"ak4642-hifi Playback", "DAI0 Playback";
>
>> non DT
>> 	struct snd_soc_dapm_route route[] = {
>> 		{ "ak4642-hifi Playback", NULL, "DAI0 Playback"},
>> 	}
>
> If we're already specifying the DAI links for the (D)PCM code it seems
> like we shouldn't also have to put DAPM routes for them in DT as well.
>

Yes, and I think we shouldn't use anything except for datahsheet pin names 
in the devicetree routing, because otherwise we are leaking driver 
implementation details.
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 645 bytes --]

On Tue, Aug 26, 2014 at 11:19:01AM +0200, Lars-Peter Clausen wrote:
> On 08/26/2014 11:11 AM, Mark Brown wrote:

> >If we're already specifying the DAI links for the (D)PCM code it seems
> >like we shouldn't also have to put DAPM routes for them in DT as well.

> Yes, and I think we shouldn't use anything except for datahsheet pin names
> in the devicetree routing, because otherwise we are leaking driver
> implementation details.

While I agree with the sentiment for this when it comes to DAIs we
probably want to use the name the interfaces get in the documentation
rather than pin names since they involve multiple pins working together.

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Mark, Lars

I'm confusing

> > >If we're already specifying the DAI links for the (D)PCM code it seems
> > >like we shouldn't also have to put DAPM routes for them in DT as well.
> 
> > Yes, and I think we shouldn't use anything except for datahsheet pin names
> > in the devicetree routing, because otherwise we are leaking driver
> > implementation details.

It came from snd_soc_of_parse_audio_routing()
Do you mean this function itself is not good ?

> While I agree with the sentiment for this when it comes to DAIs we
> probably want to use the name the interfaces get in the documentation
> rather than pin names since they involve multiple pins working together.

Sorry, but what does your "interfaces get in the documentation" mean ?
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 1072 bytes --]

On Tue, Aug 26, 2014 at 03:31:44AM -0700, Kuninori Morimoto wrote:

> > > >If we're already specifying the DAI links for the (D)PCM code it seems
> > > >like we shouldn't also have to put DAPM routes for them in DT as well.

> > > Yes, and I think we shouldn't use anything except for datahsheet pin names
> > > in the devicetree routing, because otherwise we are leaking driver
> > > implementation details.

> It came from snd_soc_of_parse_audio_routing()
> Do you mean this function itself is not good ?

That's intended to be routing analogue pins to each other, not for DAI
links in DPCM - for DAI links we should be getting this information from
elsewhere.

> > While I agree with the sentiment for this when it comes to DAIs we
> > probably want to use the name the interfaces get in the documentation
> > rather than pin names since they involve multiple pins working together.

> Sorry, but what does your "interfaces get in the documentation" mean ?

If the documentation refers to the interface as for example "I2S0" then
the DT should refer to it as I2S0 too.

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Mark

> > > > >If we're already specifying the DAI links for the (D)PCM code it seems
> > > > >like we shouldn't also have to put DAPM routes for them in DT as well.
> 
> > > > Yes, and I think we shouldn't use anything except for datahsheet pin names
> > > > in the devicetree routing, because otherwise we are leaking driver
> > > > implementation details.
> 
> > It came from snd_soc_of_parse_audio_routing()
> > Do you mean this function itself is not good ?
> 
> That's intended to be routing analogue pins to each other, not for DAI
> links in DPCM - for DAI links we should be getting this information from
> elsewhere.
> 
> > > While I agree with the sentiment for this when it comes to DAIs we
> > > probably want to use the name the interfaces get in the documentation
> > > rather than pin names since they involve multiple pins working together.
> 
> > Sorry, but what does your "interfaces get in the documentation" mean ?
> 
> If the documentation refers to the interface as for example "I2S0" then
> the DT should refer to it as I2S0 too.

Hmm...
This means we need update DPCM interface ?
In my understanding, DPCM needs DAPM
routing information somehow in final stage.
But, we want to specify it as "DAI link" like interface.

Now, I have many questions.

If my understand is correct, my prev patch is OK for "DAPM final stage",
but we need wrapper for "DPCM interface" ?
It will exchanges "I2S0" to "ak4642 Playback" internally.
(And exchanges format too ?)

Is this needed as "DT interface" ?
Can non-DT code use "ak4642 Playback" directly ?
I'm wondering that some driver is using DPCM already (in non-DT) in upstream.

If we can use "I2S0" interface, it is understandable if FE/BE was

   FE cpu:   CPU-A
      codec: dummy

   BE cpu:   dummy
      codec: Codec-A

But, How about this case ?

   FE cpu:   CPU-A
      codec: Codec-A

   BE cpu:   CPU-B
      codec: Codec-B

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Mark again

> But, How about this case ?
> 
>    FE cpu:   CPU-A
>       codec: Codec-A
> 
>    BE cpu:   CPU-B
>       codec: Codec-B

I found 1 method.
I can create it if we can assume that
"simple-card doen't support above style",

> If the documentation refers to the interface as for example "I2S0" then
> the DT should refer to it as I2S0 too.

simple-card is using "format" property now,
and I remember that someone want to exchange format in DPCM.

My 1st DPCM patch used "remote" property for specify FE/BE.
And, we can get DAI stream_name if we can update snd_soc_of_get_dai_name()
This means, we can use DPCM like below
if you can accept my previous "ASoC: dapm: enable DAI name on DAPM route"
What do you think ?

	sound {
		compatible = "simple-audio-card";

		/* FrontEnd */
		simple-audio-card,dai-link@0 {
			...
			format = "left_j";
			remote = <&endpoint>;

			cpu {
				sound-dai = <&rcar_sound 0>;
			};
			codec { /* dummy */ };
		};

		/* BackEnd */
		endpoint: simple-audio-card,dai-link@1 {
			...
			format = "left_j";

			cpu { /* dummy */ };
			codec1: codec {
				sound-dai = <&ak4643>;
			};
		};
	};

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Lars-Peter Clausen]

On 08/27/2014 05:14 AM, Kuninori Morimoto wrote:
>
> Hi Mark again
>
>> But, How about this case ?
>>
>>     FE cpu:   CPU-A
>>        codec: Codec-A
>>
>>     BE cpu:   CPU-B
>>        codec: Codec-B
>
> I found 1 method.
> I can create it if we can assume that
> "simple-card doen't support above style",
>
>> If the documentation refers to the interface as for example "I2S0" then
>> the DT should refer to it as I2S0 too.
>
> simple-card is using "format" property now,
> and I remember that someone want to exchange format in DPCM.
>
> My 1st DPCM patch used "remote" property for specify FE/BE.
> And, we can get DAI stream_name if we can update snd_soc_of_get_dai_name()
> This means, we can use DPCM like below
> if you can accept my previous "ASoC: dapm: enable DAI name on DAPM route"
> What do you think ?
>
> 	sound {
> 		compatible = "simple-audio-card";
>
> 		/* FrontEnd */
> 		simple-audio-card,dai-link@0 {
> 			...
> 			format = "left_j";
> 			remote = <&endpoint>;
>
> 			cpu {
> 				sound-dai = <&rcar_sound 0>;
> 			};
> 			codec { /* dummy */ };
> 		};
>
> 		/* BackEnd */
> 		endpoint: simple-audio-card,dai-link@1 {
> 			...
> 			format = "left_j";
>
> 			cpu { /* dummy */ };
> 			codec1: codec {
> 				sound-dai = <&ak4643>;
> 			};
> 		};
> 	};

When you try to come up with with a binding try to completely ignore that 
something call DPCM exists. The binding is supposed to describe the hardware 
and how the different hardware components are interconnected. So try to come 
up with a binding that accurately describes the hardware connections. Once 
that is done try to map the binding onto the existing software framework. 
The last step may require some adjustments to the framework.

- Lars

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Lars

Thank you for your comment

> > 	sound {
> > 		compatible = "simple-audio-card";
> >
> > 		/* FrontEnd */
> > 		simple-audio-card,dai-link@0 {
> > 			...
> > 			format = "left_j";
> > 			remote = <&endpoint>;
> >
> > 			cpu {
> > 				sound-dai = <&rcar_sound 0>;
> > 			};
> > 			codec { /* dummy */ };
> > 		};
> >
> > 		/* BackEnd */
> > 		endpoint: simple-audio-card,dai-link@1 {
> > 			...
> > 			format = "left_j";
> >
> > 			cpu { /* dummy */ };
> > 			codec1: codec {
> > 				sound-dai = <&ak4643>;
> > 			};
> > 		};
> > 	};
> 
> When you try to come up with with a binding try to completely ignore that 
> something call DPCM exists. The binding is supposed to describe the hardware 
> and how the different hardware components are interconnected. So try to come 
> up with a binding that accurately describes the hardware connections. Once 
> that is done try to map the binding onto the existing software framework. 
> The last step may require some adjustments to the framework.

Now, my system is working well with simple-card by this

	sound {
		compatible = "simple-audio-card";
		...

		cpu {
			sound-dai = <&rcar_sound 0>;
		};
		codec {
			sound-dai = <&ak4643>;
		};
	};

The reason why I'm tring to support DPCM on simple-card is "sampling rate convert".
My rcar_sound can convert sampling rate, and I tried to add this feature as
rcar_sound property.
But, Mark rejected and requests me to use DPCM for it,
since it can be common featrue.
Current existing simple-card can't use it, and I'm tring.
But, am I misunderstanding ?

Best regards
---
Kuninori Morimoto
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Lars-Peter Clausen]

On 08/28/2014 02:33 AM, Kuninori Morimoto wrote:
>
> Hi Lars
>
> Thank you for your comment
>
>>> 	sound {
>>> 		compatible = "simple-audio-card";
>>>
>>> 		/* FrontEnd */
>>> 		simple-audio-card,dai-link@0 {
>>> 			...
>>> 			format = "left_j";
>>> 			remote = <&endpoint>;
>>>
>>> 			cpu {
>>> 				sound-dai = <&rcar_sound 0>;
>>> 			};
>>> 			codec { /* dummy */ };
>>> 		};
>>>
>>> 		/* BackEnd */
>>> 		endpoint: simple-audio-card,dai-link@1 {
>>> 			...
>>> 			format = "left_j";
>>>
>>> 			cpu { /* dummy */ };
>>> 			codec1: codec {
>>> 				sound-dai = <&ak4643>;
>>> 			};
>>> 		};
>>> 	};
>>
>> When you try to come up with with a binding try to completely ignore that
>> something call DPCM exists. The binding is supposed to describe the hardware
>> and how the different hardware components are interconnected. So try to come
>> up with a binding that accurately describes the hardware connections. Once
>> that is done try to map the binding onto the existing software framework.
>> The last step may require some adjustments to the framework.
>
> Now, my system is working well with simple-card by this
>
> 	sound {
> 		compatible = "simple-audio-card";
> 		...
>
> 		cpu {
> 			sound-dai = <&rcar_sound 0>;
> 		};
> 		codec {
> 			sound-dai = <&ak4643>;
> 		};
> 	};
>
> The reason why I'm tring to support DPCM on simple-card is "sampling rate convert".
> My rcar_sound can convert sampling rate, and I tried to add this feature as
> rcar_sound property.
> But, Mark rejected and requests me to use DPCM for it,
> since it can be common featrue.
> Current existing simple-card can't use it, and I'm tring.
> But, am I misunderstanding ?

Is the sample rate converter a extra module, or is the sample rate converter 
just a feature of the I2S core?

- Lars

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Lars

> > The reason why I'm tring to support DPCM on simple-card is "sampling rate convert".
> > My rcar_sound can convert sampling rate, and I tried to add this feature as
> > rcar_sound property.
> > But, Mark rejected and requests me to use DPCM for it,
> > since it can be common featrue.
> > Current existing simple-card can't use it, and I'm tring.
> > But, am I misunderstanding ?
> 
> Is the sample rate converter a extra module, or is the sample rate converter 
> just a feature of the I2S core?

Does this "I2S core" = CPU ?
Then, it is CPU's feature.
The image is like this

  48kHz   --->      48kHz
  44.1kHz ---> [CPU] ---> [codec]
  96kHz   --->

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 1127 bytes --]

On Wed, Aug 27, 2014 at 05:33:55PM -0700, Kuninori Morimoto wrote:

> Now, my system is working well with simple-card by this

> 	sound {
> 		compatible = "simple-audio-card";
> 		...
> 
> 		cpu {
> 			sound-dai = <&rcar_sound 0>;
> 		};
> 		codec {
> 			sound-dai = <&ak4643>;
> 		};
> 	};

> The reason why I'm tring to support DPCM on simple-card is "sampling rate convert".
> My rcar_sound can convert sampling rate, and I tried to add this feature as
> rcar_sound property.
> But, Mark rejected and requests me to use DPCM for it,
> since it can be common featrue.
> Current existing simple-card can't use it, and I'm tring.
> But, am I misunderstanding ?

There's two separate things here.  One is how the code is implemented
(which does look very much like it should be doing DPCM) and the other
is how the DT binding looks - the DT binding is supposed to be a
hardware neutral thing and not depend on Linux implementation details.
If you've already got the hardware described well enough to discover
everything then that generally indicates that the DT binding should not
need to change.

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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi

> > 	sound {
> > 		compatible = "simple-audio-card";
> > 		...
> > 
> > 		cpu {
> > 			sound-dai = <&rcar_sound 0>;
> > 		};
> > 		codec {
> > 			sound-dai = <&ak4643>;
> > 		};
> > 	};
(snip)
> There's two separate things here.  One is how the code is implemented
> (which does look very much like it should be doing DPCM) and the other
> is how the DT binding looks - the DT binding is supposed to be a
> hardware neutral thing and not depend on Linux implementation details.
> If you've already got the hardware described well enough to discover
> everything then that generally indicates that the DT binding should not
> need to change.

In my case, I need DPCM if CPU want to use "sampling rate convert",
otherwise, I don't need it.
So, DPCM <-> non DPCM switching happen if DTS has
sampling-rate-convert = <xxxxxxx> or something like that.
Does my understanding correct ?
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Re: [alsa-devel] [PATCH 8/8] ASoC: add snd-soc-dummy DT support

[Kuninori Morimoto]

Hi Mark, Lars

> > > 	sound {
> > > 		compatible = "simple-audio-card";
> > > 		...
> > > 
> > > 		cpu {
> > > 			sound-dai = <&rcar_sound 0>;
> > > 		};
> > > 		codec {
> > > 			sound-dai = <&ak4643>;
> > > 		};
> > > 	};
> (snip)
> > There's two separate things here.  One is how the code is implemented
> > (which does look very much like it should be doing DPCM) and the other
> > is how the DT binding looks - the DT binding is supposed to be a
> > hardware neutral thing and not depend on Linux implementation details.
> > If you've already got the hardware described well enough to discover
> > everything then that generally indicates that the DT binding should not
> > need to change.
> 
> In my case, I need DPCM if CPU want to use "sampling rate convert",
> otherwise, I don't need it.
> So, DPCM <-> non DPCM switching happen if DTS has
> sampling-rate-convert = <xxxxxxx> or something like that.
> Does my understanding correct ?

I re-considered about above, and checked current code.
If my above understanding was correct,
simple-card driver needs many patches to support it.
And, it is not easy

I want to synchronize basic agreement before starting it.
Otherwise, it is easy to reject my many weeks work,
and I don't want it.
# 1st simple-card DT support used 1 year...

My understanding is below.
It is good match for my current purpose,
and "sampling-rate-convert feature via DPCM" can be standard on simple-card.
My concern is simple card code will be not simple...

-- non DPCM ----

	sound {
		compatible = "simple-audio-card";
		...
		cpu {
			sound-dai = <&cpu-dai>;
		};
		codec {
			sound-dai = <&codec-dai>;
		};
	};

        same as current style

-- DPCM ----

	sound {
		compatible = "simple-audio-card";
		...
		cpu {
			sound-dai = <&cpu-dai>;
		};
		codec {
			sound-dai = <&codec-dai>;
			fixed-sampling-rate = <44100>;
		};
	};

	DPCM FE/BE will be

        FE cpu   : cpu-dai
           codec : dummy

        BE cpu   : dummy
           codec : codec-dai

        required route will be created automatically
        but, it needs "enable DAI name on DAPM route" method anyway
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Re: [PATCH 0/8] ASoC: simple-card: DPCM support

[Kuninori Morimoto]

Hi Mark

> 1) - 4) are tidyup patches of simple-card
> 5) adds DPCM support on simple-card
> 6) tidyups asoc_simple_card_sub_parse_of() (based on 5)
> 7) is requred DPCM on Renesas R-Car driver
> 8) is DT support on dummy driver
(snip)
> Kuninori Morimoto (8):
>   1) ASoC: simple-card: use asoc_simple_xxx prefix
>   2) ASoC: simple-card: remove dai_link->cpu_dai_name when DT
>   3) ASoC: simple-card: dai_link->init should be cared when multi DAI
>   4) ASoC: simple-card: use common for_each_child_of_node() for loop
>   5) ASoC: simple-card: add DPCM support when DT case
>   6) ASoC: simple-card: remove is_top_level_node from asoc_simple_card_sub_parse_of()
>   7) ASoC: rsnd: add dai_link stream name
>   8) ASoC: add snd-soc-dummy DT support

I will re-consider about DPCM DT support.
but, can you please care about 1) - 4) only at this point ?
These are bug fix patches.
I will resend v2 patches for 5) - 8)
And I'm very happy if I can get some feedback about 5)

Best regards
---
Kuninori Morimoto
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Re: [PATCH 0/8] ASoC: simple-card: DPCM support

[Kuninori Morimoto]

Hi Mark

> > 1) - 4) are tidyup patches of simple-card
> > 5) adds DPCM support on simple-card
> > 6) tidyups asoc_simple_card_sub_parse_of() (based on 5)
> > 7) is requred DPCM on Renesas R-Car driver
> > 8) is DT support on dummy driver
> (snip)
> > Kuninori Morimoto (8):
> >   1) ASoC: simple-card: use asoc_simple_xxx prefix
> >   2) ASoC: simple-card: remove dai_link->cpu_dai_name when DT
> >   3) ASoC: simple-card: dai_link->init should be cared when multi DAI
> >   4) ASoC: simple-card: use common for_each_child_of_node() for loop
> >   5) ASoC: simple-card: add DPCM support when DT case
> >   6) ASoC: simple-card: remove is_top_level_node from asoc_simple_card_sub_parse_of()
> >   7) ASoC: rsnd: add dai_link stream name
> >   8) ASoC: add snd-soc-dummy DT support
> 
> I will re-consider about DPCM DT support.
> but, can you please care about 1) - 4) only at this point ?
> These are bug fix patches.
> I will resend v2 patches for 5) - 8)
> And I'm very happy if I can get some feedback about 5)

There is no response.
I will re-post above 1) - 4) as v2 patch-set


Best regards
---
Kuninori Morimoto
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[PATCH 0/4 v2] ASoC: simple-card: fixup for DT

[Kuninori Morimoto]

Hi Mark

These are fixup/tidyup patches for simple-card DT.
Some sound card can't probe without these patches. 

Kuninori Morimoto (4):
      ASoC: simple-card: use asoc_simple_xxx prefix
      ASoC: simple-card: remove dai_link->cpu_dai_name when DT
      ASoC: simple-card: dai_link->init should be cared when multi DAI
      ASoC: simple-card: use common for_each_child_of_node() for loop

 sound/soc/generic/simple-card.c |   56 +++++++++++++++++++--------------------
 1 file changed, 28 insertions(+), 28 deletions(-)



Best regards
---
Kuninori Morimoto

[PATCH 1/4 v2] ASoC: simple-card: use asoc_simple_xxx prefix

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

simple-card driver is using asoc_simple_xxx() prefix.
simple_card_dai_link_of() should be
asoc_simple_card_dai_link_of().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v1 -> v2

  - no change

 sound/soc/generic/simple-card.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 21b0ea2..c5445b0 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -163,11 +163,11 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
 	return 0;
 }
 
-static int simple_card_dai_link_of(struct device_node *node,
-				   struct device *dev,
-				   struct snd_soc_dai_link *dai_link,
-				   struct simple_dai_props *dai_props,
-				   bool is_top_level_node)
+static int asoc_simple_card_dai_link_of(struct device_node *node,
+					struct device *dev,
+					struct snd_soc_dai_link *dai_link,
+					struct simple_dai_props *dai_props,
+					bool is_top_level_node)
 {
 	struct device_node *np = NULL;
 	struct device_node *bitclkmaster = NULL;
@@ -337,16 +337,18 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 		int i;
 		for (i = 0; (np = of_get_next_child(node, np)); i++) {
 			dev_dbg(dev, "\tlink %d:\n", i);
-			ret = simple_card_dai_link_of(np, dev, dai_link + i,
-						      dai_props + i, false);
+			ret = asoc_simple_card_dai_link_of(np, dev,
+							   dai_link + i,
+							   dai_props + i,
+							   false);
 			if (ret < 0) {
 				of_node_put(np);
 				return ret;
 			}
 		}
 	} else {
-		ret = simple_card_dai_link_of(node, dev, dai_link, dai_props,
-					      true);
+		ret = asoc_simple_card_dai_link_of(node, dev,
+						   dai_link, dai_props, true);
 		if (ret < 0)
 			return ret;
 	}
-- 
1.7.9.5

Re: [PATCH 1/4 v2] ASoC: simple-card: use asoc_simple_xxx prefix

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 285 bytes --]

On Wed, Aug 27, 2014 at 08:07:46PM -0700, Kuninori Morimoto wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> simple-card driver is using asoc_simple_xxx() prefix.
> simple_card_dai_link_of() should be
> asoc_simple_card_dai_link_of().

Applied, thanks.

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[PATCH 2/4 v2] ASoC: simple-card: remove dai_link->cpu_dai_name when DT

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

f687d900d30a61dda38db2a99239f5284a86a309
(ASoC: simple-card: cpu_dai_name creates confusion when DT case)
removed dai_link->cpu_dai_name when DT case,
since it uses DT phand in soc_bind_dai_link().
This binding will fail if it has cpu_dai_name.

6a91a17bd7b92b2d2aa9ece85457f52a62fd7708
(ASoC: simple-card: Handle many DAI links)
added multi DAI link support to simple-card driver.
Then, removing cpu_dai_name was cared only single DAI.
But, it is needed in all DT cases.
This patch moves it to asoc_simple_card_dai_link_of()
so that care about all DAIs.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v1 -> v2

 - no change

 sound/soc/generic/simple-card.c |   23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index c5445b0..e8185a0 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -285,6 +285,17 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 		dai_props->codec_dai.fmt,
 		dai_props->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_link_of_err:
 	if (np)
 		of_node_put(np);
@@ -429,18 +440,6 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 			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;
 
-- 
1.7.9.5

Re: [PATCH 2/4 v2] ASoC: simple-card: remove dai_link->cpu_dai_name when DT

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 414 bytes --]

On Wed, Aug 27, 2014 at 08:08:06PM -0700, Kuninori Morimoto wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> f687d900d30a61dda38db2a99239f5284a86a309
> (ASoC: simple-card: cpu_dai_name creates confusion when DT case)
> removed dai_link->cpu_dai_name when DT case,
> since it uses DT phand in soc_bind_dai_link().
> This binding will fail if it has cpu_dai_name.

Applied, thanks.

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[PATCH 3/4 v2] ASoC: simple-card: dai_link->init should be cared when multi DAI

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

6a91a17bd7b92b2d2aa9ece85457f52a62fd7708
(ASoC: simple-card: Handle many DAI links)
added multi DAI support on simple-card.
This means priv->dai_link might be pointer of multi DAI.
dai_link->init is needed for all DAI.
This patch cares it for all DAIs on DT/non-DT

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v1 -> v2

 - no change

 sound/soc/generic/simple-card.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index e8185a0..8902704 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -274,6 +274,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 				dai_link->codec_dai_name);
 	dai_link->name = dai_link->stream_name = name;
 	dai_link->ops = &asoc_simple_card_ops;
+	dai_link->init = asoc_simple_card_dai_init;
 
 	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
@@ -465,6 +466,7 @@ 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;
+		dai_link->init		= asoc_simple_card_dai_init;
 		memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 					sizeof(priv->dai_props->cpu_dai));
 		memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
@@ -474,11 +476,6 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 		priv->dai_props->codec_dai.fmt	|= cinfo->daifmt;
 	}
 
-	/*
-	 * init snd_soc_dai_link
-	 */
-	dai_link->init = asoc_simple_card_dai_init;
-
 	snd_soc_card_set_drvdata(&priv->snd_card, priv);
 
 	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
-- 
1.7.9.5

Re: [PATCH 3/4 v2] ASoC: simple-card: dai_link->init should be cared when multi DAI

[Mark Brown]

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On Wed, Aug 27, 2014 at 08:08:27PM -0700, Kuninori Morimoto wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> 6a91a17bd7b92b2d2aa9ece85457f52a62fd7708
> (ASoC: simple-card: Handle many DAI links)
> added multi DAI support on simple-card.

Applied, thanks.

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[PATCH 4/4 v2] ASoC: simple-card: use common for_each_child_of_node() for loop

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v1 -> v2

 - no change

 sound/soc/generic/simple-card.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 8902704..fd8b045 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -346,8 +346,9 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 
 	if (multi) {
 		struct device_node *np = NULL;
-		int i;
-		for (i = 0; (np = of_get_next_child(node, np)); i++) {
+		int i = 0;
+
+		for_each_child_of_node(node, np) {
 			dev_dbg(dev, "\tlink %d:\n", i);
 			ret = asoc_simple_card_dai_link_of(np, dev,
 							   dai_link + i,
@@ -357,6 +358,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 				of_node_put(np);
 				return ret;
 			}
+			i++;
 		}
 	} else {
 		ret = asoc_simple_card_dai_link_of(node, dev,
-- 
1.7.9.5

Re: [PATCH 4/4 v2] ASoC: simple-card: use common for_each_child_of_node() for loop

[Mark Brown]

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On Wed, Aug 27, 2014 at 08:08:47PM -0700, Kuninori Morimoto wrote:
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

applied, thanks.

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