@@ -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
new file mode 100644
@@ -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, "dai-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);
new file mode 100644
@@ -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
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