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 --- sound/soc/mediatek/common/Makefile | 2 +- .../mediatek/common/mtk-soundcard-driver.c | 79 +++++++++++++++++++ .../mediatek/common/mtk-soundcard-driver.h | 14 ++++ 3 files changed, 94 insertions(+), 1 deletion(-) create mode 100644 sound/soc/mediatek/common/mtk-soundcard-driver.c create mode 100644 sound/soc/mediatek/common/mtk-soundcard-driver.h
diff --git a/sound/soc/mediatek/common/Makefile b/sound/soc/mediatek/common/Makefile index 576deb7f8cce..42e636c10c1e 100644 --- a/sound/soc/mediatek/common/Makefile +++ b/sound/soc/mediatek/common/Makefile @@ -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 diff --git a/sound/soc/mediatek/common/mtk-soundcard-driver.c b/sound/soc/mediatek/common/mtk-soundcard-driver.c new file mode 100644 index 000000000000..7c55c2cb1f21 --- /dev/null +++ b/sound/soc/mediatek/common/mtk-soundcard-driver.c @@ -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); diff --git a/sound/soc/mediatek/common/mtk-soundcard-driver.h b/sound/soc/mediatek/common/mtk-soundcard-driver.h new file mode 100644 index 000000000000..d92cac1d7b72 --- /dev/null +++ b/sound/soc/mediatek/common/mtk-soundcard-driver.h @@ -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