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ASoC: mediatek: common: add soundcard driver common code

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Add common code to support of_node of codec parsing, so codec phandle
can be assigned by sound-dai in dts.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230116034131.23943-12-trevor.wu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Trevor Wu 2023-01-16 11:41:29 +08:00 committed by Mark Brown
parent 692d25b67e
commit 4302187d95
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GPG Key ID: 24D68B725D5487D0
3 changed files with 94 additions and 1 deletions
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2
sound/soc/mediatek/common/Makefile
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@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
# platform driver
snd-soc-mtk-common-objs := mtk-afe-platform-driver.o mtk-afe-fe-dai.o mtk-dsp-sof-common.o
snd-soc-mtk-common-objs := mtk-afe-platform-driver.o mtk-afe-fe-dai.o mtk-dsp-sof-common.o mtk-soundcard-driver.o
obj-$(CONFIG_SND_SOC_MEDIATEK) += snd-soc-mtk-common.o
obj-$(CONFIG_SND_SOC_MTK_BTCVSD) += mtk-btcvsd.o

79
sound/soc/mediatek/common/mtk-soundcard-driver.c Normal file
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@ -0,0 +1,79 @@
// SPDX-License-Identifier: GPL-2.0
/*
* mtk-soundcard-driver.c -- MediaTek soundcard driver common
*
* Copyright (c) 2022 MediaTek Inc.
* Author: Trevor Wu <trevor.wu@mediatek.com>
*/
#include <linux/module.h>
#include <linux/of.h>
#include <sound/soc.h>
#include "mtk-soundcard-driver.h"
static int set_card_codec_info(struct snd_soc_card *card,
struct device_node *sub_node,
struct snd_soc_dai_link *dai_link)
{
struct device *dev = card->dev;
struct device_node *codec_node;
int ret;
codec_node = of_get_child_by_name(sub_node, "codec");
if (!codec_node)
return -EINVAL;
/* set card codec info */
ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, dai_link);
of_node_put(codec_node);
if (ret < 0)
return dev_err_probe(dev, ret, "%s: codec dai not found\n",
dai_link->name);
return 0;
}
int parse_dai_link_info(struct snd_soc_card *card)
{
struct device *dev = card->dev;
struct device_node *sub_node;
struct snd_soc_dai_link *dai_link;
const char *dai_link_name;
int ret, i;
/* Loop over all the dai link sub nodes */
for_each_available_child_of_node(dev->of_node, sub_node) {
if (of_property_read_string(sub_node, "link-name",
&dai_link_name))
return -EINVAL;
for_each_card_prelinks(card, i, dai_link) {
if (!strcmp(dai_link_name, dai_link->name))
break;
}
if (i >= card->num_links)
return -EINVAL;
ret = set_card_codec_info(card, sub_node, dai_link);
if (ret < 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(parse_dai_link_info);
void clean_card_reference(struct snd_soc_card *card)
{
struct snd_soc_dai_link *dai_link;
int i;
/* release codec reference gotten by set_card_codec_info */
for_each_card_prelinks(card, i, dai_link)
snd_soc_of_put_dai_link_codecs(dai_link);
}
EXPORT_SYMBOL_GPL(clean_card_reference);

14
sound/soc/mediatek/common/mtk-soundcard-driver.h Normal file
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@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* mtk-soundcard-driver.h -- MediaTek soundcard driver common definition
*
* Copyright (c) 2022 MediaTek Inc.
* Author: Trevor Wu <trevor.wu@mediatek.com>
*/
#ifndef _MTK_SOUNDCARD_DRIVER_H_
#define _MTK_SOUNDCARD_DRIVER_H_
int parse_dai_link_info(struct snd_soc_card *card);
void clean_card_reference(struct snd_soc_card *card);
#endif