linux-kernel - [PATCH v2 3/3] ASoC: simple-card-utils: Fixup DAI sample format

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Date:   Mon, 1 Aug 2022 21:37:32 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <broonie@...nel.org>, <lgirdwood@...il.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <kuninori.morimoto.gx@...esas.com>
CC:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Sameer Pujar <spujar@...dia.com>
Subject: [PATCH v2 3/3] ASoC: simple-card-utils: Fixup DAI sample format

Parse "convert-sample-format" DT binding and fixup the sample format
as applicable. This is similar to the existing "convert-channels" and
"convert-rate" properties for channels and rate fixup respectively.

Signed-off-by: Sameer Pujar <spujar@...dia.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 include/sound/simple_card_utils.h     |  1 +
 sound/soc/generic/simple-card-utils.c | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index ab55f40..a0b827f 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -39,6 +39,7 @@ struct asoc_simple_dai {
 struct asoc_simple_data {
 	u32 convert_rate;
 	u32 convert_channels;
+	const char *convert_sample_format;
 };
 
 struct asoc_simple_jack {
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 4a29e31..1b201dd 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -15,6 +15,33 @@
 #include <sound/pcm_params.h>
 #include <sound/simple_card_utils.h>
 
+static void asoc_simple_fixup_sample_fmt(struct asoc_simple_data *data,
+					 struct snd_pcm_hw_params *params)
+{
+	int i;
+	struct snd_mask *mask = hw_param_mask(params,
+					      SNDRV_PCM_HW_PARAM_FORMAT);
+	struct {
+		char *fmt;
+		u32 val;
+	} of_sample_fmt_table[] = {
+		{ "s8",		SNDRV_PCM_FORMAT_S8},
+		{ "s16_le",	SNDRV_PCM_FORMAT_S16_LE},
+		{ "s24_le",	SNDRV_PCM_FORMAT_S24_LE},
+		{ "s24_3le",	SNDRV_PCM_FORMAT_S24_3LE},
+		{ "s32_le",	SNDRV_PCM_FORMAT_S32_LE},
+	};
+
+	for (i = 0; i < ARRAY_SIZE(of_sample_fmt_table); i++) {
+		if (!strcmp(data->convert_sample_format,
+			    of_sample_fmt_table[i].fmt)) {
+			snd_mask_none(mask);
+			snd_mask_set(mask, of_sample_fmt_table[i].val);
+			break;
+		}
+	}
+}
+
 void asoc_simple_convert_fixup(struct asoc_simple_data *data,
 			       struct snd_pcm_hw_params *params)
 {
@@ -30,6 +57,9 @@ void asoc_simple_convert_fixup(struct asoc_simple_data *data,
 	if (data->convert_channels)
 		channels->min =
 		channels->max = data->convert_channels;
+
+	if (data->convert_sample_format)
+		asoc_simple_fixup_sample_fmt(data, params);
 }
 EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup);
 
@@ -49,6 +79,10 @@ void asoc_simple_parse_convert(struct device_node *np,
 	/* channels transfer */
 	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
 	of_property_read_u32(np, prop, &data->convert_channels);
+
+	/* convert sample format */
+	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-sample-format");
+	of_property_read_string(np, prop, &data->convert_sample_format);
 }
 EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
 
-- 
2.7.4