linux-kernel - [PATCH v2] ASoC: simple-card: Fix up checks for HW param fixups

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Message-Id: <20221019012302.633830-1-aidanmacdonald.0x0@gmail.com>
Date:   Wed, 19 Oct 2022 02:23:02 +0100
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org
Cc:     kuninori.morimoto.gx@...esas.com, spujar@...dia.com,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] ASoC: simple-card: Fix up checks for HW param fixups

The "convert-xxx" properties only have an effect for DPCM DAI links.
A DAI link is only created as DPCM if the device tree requires it;
part of this involves checking for the use of "convert-xxx" properties.

When the convert-sample-format property was added, the checks got out
of sync. A DAI link that specified only convert-sample-format but did
not pass any of the other DPCM checks would not go into DPCM mode and
the convert-sample-format property would be silently ignored.

Fix this by adding a function to do the "convert-xxx" property checks,
instead of open-coding it in simple-card and audio-graph-card. And add
"convert-sample-format" to the check function so that DAI links using
it will be initialized correctly.

Fixes: 047a05366f4b ("ASoC: simple-card-utils: Fixup DAI sample format")
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
---
v2: Rename helper function to asoc_simple_is_convert_required() as
    suggested by Kuninori Morimoto.

 include/sound/simple_card_utils.h     |  1 +
 sound/soc/generic/audio-graph-card.c  |  2 +-
 sound/soc/generic/simple-card-utils.c | 15 +++++++++++++++
 sound/soc/generic/simple-card.c       |  3 +--
 4 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index a0b827f0c2f6..25e049f44178 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -177,6 +177,7 @@ void asoc_simple_convert_fixup(struct asoc_simple_data *data,
 				      struct snd_pcm_hw_params *params);
 void asoc_simple_parse_convert(struct device_node *np, char *prefix,
 			       struct asoc_simple_data *data);
+bool asoc_simple_is_convert_required(const struct asoc_simple_data *data);
 
 int asoc_simple_parse_routing(struct snd_soc_card *card,
 				      char *prefix);
diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index b327372f2e4a..fe7cf972d44c 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -417,7 +417,7 @@ static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
 	 * or has convert-xxx property
 	 */
 	if ((of_get_child_count(codec_port) > 1) ||
-	    (adata->convert_rate || adata->convert_channels))
+	    asoc_simple_is_convert_required(adata))
 		return true;
 
 	return false;
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index bef16833c487..be69bbc47f81 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -85,6 +85,21 @@ void asoc_simple_parse_convert(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
 
+/**
+ * asoc_simple_is_convert_required() - Query if HW param conversion was requested
+ * @data: Link data.
+ *
+ * Returns true if any HW param conversion was requested for this DAI link with
+ * any "convert-xxx" properties.
+ */
+bool asoc_simple_is_convert_required(const struct asoc_simple_data *data)
+{
+	return data->convert_rate ||
+	       data->convert_channels ||
+	       data->convert_sample_format;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_is_convert_required);
+
 int asoc_simple_parse_daifmt(struct device *dev,
 			     struct device_node *node,
 			     struct device_node *codec,
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 78419e18717d..feb55b66239b 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -393,8 +393,7 @@ static int __simple_for_each_link(struct asoc_simple_priv *priv,
 			 * or has convert-xxx property
 			 */
 			if (dpcm_selectable &&
-			    (num > 2 ||
-			     adata.convert_rate || adata.convert_channels)) {
+			    (num > 2 || asoc_simple_is_convert_required(&adata))) {
 				/*
 				 * np
 				 *	 |1(CPU)|0(Codec)  li->cpu
-- 
2.38.0