1 files changed, 54 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/sof_sdw_rt_dmic.c b/sound/soc/intel/boards/sof_sdw_rt_dmic.c
new file mode 100644
index 000000000000..b8b493d5c6ec
--- /dev/null
+++ b/sound/soc/intel/boards/sof_sdw_rt_dmic.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2024 Intel Corporation
+
+/*
+ * sof_sdw_rt_dmic - Helpers to handle Realtek SDW DMIC from generic machine driver
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include "sof_board_helpers.h"
+#include "sof_sdw_common.h"
+
+static const char * const dmics[] = {
+	"rt715",
+	"rt715-sdca",
+	"rt712-sdca-dmic",
+	"rt722-sdca",
+};
+
+int rt_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai)
+{
+	struct snd_soc_card *card = rtd->card;
+	struct snd_soc_component *component;
+	struct snd_soc_dai *codec_dai;
+	char *mic_name;
+
+	codec_dai = get_codec_dai_by_name(rtd, dmics, ARRAY_SIZE(dmics));
+	if (!codec_dai)
+		return -EINVAL;
+
+	component = codec_dai->component;
+
+	/*
+	 * rt715-sdca (aka rt714) is a special case that uses different name in card->components
+	 * and component->name_prefix.
+	 */
+	if (!strcmp(component->name_prefix, "rt714"))
+		mic_name = devm_kasprintf(card->dev, GFP_KERNEL, "rt715-sdca");
+	else
+		mic_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s", component->name_prefix);
+
+	card->components = devm_kasprintf(card->dev, GFP_KERNEL,
+					  "%s mic:%s", card->components,
+					  mic_name);
+	if (!card->components)
+		return -ENOMEM;
+
+	dev_dbg(card->dev, "card->components: %s\n", card->components);
+
+	return 0;
+}
+MODULE_IMPORT_NS(SND_SOC_INTEL_SOF_BOARD_HELPERS);