ASoC: simple-card: Fix configuration of DAI format

When configuring a codec to be both bit-clock and frame-master, it was found that the codec was always configured as bit-clock and frame-slave. Looking at the simple_dai_link_of() function there appears to be two problems with the configuration of the DAI format, which are ...

1. The function asoc_simple_parse_daifmt() is called before the function asoc_simple_parse_codec() and this means that the device-tree node for the codec has not been parsed yet, which is needed by the function asoc_simple_parse_daifmt() to determine who is the codec.
2. The phandle passed to asoc_simple_parse_daifmt() is the phandle to the 'codec' node and not the phandle of the actual codec defined by the 'sound-dai' property under the 'codec' node.

Fix the above by moving the call to asoc_simple_parse_daifmt() after the the call to asoc_simple_parse_codec() and pass the phandle for the codec to asoc_simple_parse_daifmt().

---
 sound/soc/generic/simple-card.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

index 9b568f578bcd..c2c8dcbcf795 100644
@@ -283,11 +283,6 @@ static int simple_dai_link_of(struct asoc_simple_priv *priv,
 	codec_dai		=
 	dai_props->codec_dai	= &priv->dais[li->dais++];
 
-	ret = asoc_simple_parse_daifmt(dev, node, codec,
-				       prefix, &dai_link->dai_fmt);
-	if (ret < 0)
-		goto dai_link_of_err;
-
 	simple_parse_mclk_fs(top, cpu, codec, dai_props, prefix);
 
 	ret = asoc_simple_parse_cpu(cpu, dai_link, &single_cpu);

@@ -298,6 +293,11 @@ static int simple_dai_link_of(struct asoc_simple_priv *priv,
 	if (ret < 0)
 		goto dai_link_of_err;
 
+	ret = asoc_simple_parse_daifmt(dev, node, dai_link->codecs->of_node,
+				       prefix, &dai_link->dai_fmt);
+	if (ret < 0)
+		goto dai_link_of_err;
+
 	ret = asoc_simple_parse_platform(plat, dai_link);
 	if (ret < 0)
 		goto dai_link_of_err;

2.7.4

The patch

ASoC: simple-card: Fix configuration of DAI format

has been applied to the asoc tree at

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks,
Mark

From: Jon Hunter <[email protected]>
Date: Thu, 16 May 2019 18:51:26 +0100
Subject: [PATCH] ASoC: simple-card: Fix configuration of DAI format

When configuring a codec to be both bit-clock and frame-master, it was found that the codec was always configured as bit-clock and frame-slave. Looking at the simple_dai_link_of() function there appears to be two problems with the configuration of the DAI format, which are ...

1. The function asoc_simple_parse_daifmt() is called before the function asoc_simple_parse_codec() and this means that the device-tree node for the codec has not been parsed yet, which is needed by the function asoc_simple_parse_daifmt() to determine who is the codec.
2. The phandle passed to asoc_simple_parse_daifmt() is the phandle to the 'codec' node and not the phandle of the actual codec defined by the 'sound-dai' property under the 'codec' node.

Fix the above by moving the call to asoc_simple_parse_daifmt() after the the call to asoc_simple_parse_codec() and pass the phandle for the codec to asoc_simple_parse_daifmt().

---
 sound/soc/generic/simple-card.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

index 9b568f578bcd..c2c8dcbcf795 100644
@@ -283,11 +283,6 @@ static int simple_dai_link_of(struct asoc_simple_priv *priv,
 	codec_dai		=
 	dai_props->codec_dai	= &priv->dais[li->dais++];
 
-	ret = asoc_simple_parse_daifmt(dev, node, codec,
-				       prefix, &dai_link->dai_fmt);
-	if (ret < 0)
-		goto dai_link_of_err;
-
 	simple_parse_mclk_fs(top, cpu, codec, dai_props, prefix);
 
 	ret = asoc_simple_parse_cpu(cpu, dai_link, &single_cpu);

@@ -298,6 +293,11 @@ static int simple_dai_link_of(struct asoc_simple_priv *priv,
 	if (ret < 0)
 		goto dai_link_of_err;
 
+	ret = asoc_simple_parse_daifmt(dev, node, dai_link->codecs->of_node,
+				       prefix, &dai_link->dai_fmt);
+	if (ret < 0)
+		goto dai_link_of_err;
+
 	ret = asoc_simple_parse_platform(plat, dai_link);
 	if (ret < 0)
 		goto dai_link_of_err;

2.20.1

Hi Mark,

Please can you drop this patch?

Per some offline review with Morimoto-san, it turns out that the actual issue resided in my DT (which was incorrect) and not the simple-card machine driver.

In my DT I incorrectly had ...

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

	...
=>	simple-audio-card,bitclock-master = <&codec>;
=>	simple-audio-card,frame-master = <&codec>;
	...

	simple-audio-card,cpu {
		sound-dai = <&xxx>;
	};

	simple-audio-card,codec {
=>		sound-dai = <&codec>;
	};
};

But I should have had ...

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

	...
=>	simple-audio-card,bitclock-master = <&codec>;
=>	simple-audio-card,frame-master = <&codec>;
	...

	simple-audio-card,cpu {
		sound-dai = <&xxx>;
	};

=> codec: simple-audio-card,codec { /* simple-card wants here */

		sound-dai = <&xxx>;		/* not here */
	};
};

Thanks to Morimoto-san for correcting me!

Cheers
Jon

nvpublic

Sure, can you send a patch doing a revert with a commit log explaining why please?