ASoC: Intel: sof_sdw: use generic rtd_init function for Realtek SDW DMICs

The only thing that the rt_xxx_rtd_init() functions do is to set
card->components. And we can set card->components with name_prefix
as rt712_sdca_dmic_rtd_init() does.
And sof_sdw_rtd_init() will always select the first dai with the
given dai->name from codec_info_list[]. Unfortunately, we have
different codecs with the same dai name. For example, dai name of
rt715 and rt715-sdca are both "rt715-aif2". Using a generic rtd_init
allow sof_sdw_rtd_init() run the rtd_init() callback from a similar
codec dai.

Fixes: 8266c731 ("ASoC: Intel: sof_sdw: add common sdw dai link init")
Reviewed-by: Chao Song <chao.song@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://msgid.link/r/20240326160429.13560-25-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/Makefile

@@ -42,6 +42,7 @@ snd-soc-sof-sdw-objs += sof_sdw.o				\
 			sof_sdw_rt711.o sof_sdw_rt_sdca_jack_common.o	\
 			sof_sdw_rt712_sdca.o sof_sdw_rt715.o	\
 			sof_sdw_rt715_sdca.o sof_sdw_rt722_sdca.o	\
+			sof_sdw_rt_dmic.o			\
 			sof_sdw_cs42l42.o sof_sdw_cs42l43.o	\
 			sof_sdw_cs_amp.o			\
 			sof_sdw_dmic.o				\

sound/soc/intel/boards/sof_sdw.c

@@ -749,7 +749,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt712-sdca-dmic-aif1",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt712_sdca_dmic_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,
@@ -779,7 +779,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt712-sdca-dmic-aif1",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt712_sdca_dmic_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,
@@ -841,7 +841,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt715-aif2",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt715_sdca_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,
@@ -856,7 +856,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt715-aif2",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt715_sdca_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,
@@ -871,7 +871,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt715-aif2",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt715_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,
@@ -886,7 +886,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 				.dai_name = "rt715-aif2",
 				.dai_type = SOF_SDW_DAI_TYPE_MIC,
 				.dailink = {SDW_UNUSED_DAI_ID, SDW_DMIC_DAI_ID},
-				.rtd_init = rt715_rtd_init,
+				.rtd_init = rt_dmic_rtd_init,
 			},
 		},
 		.dai_num = 1,

sound/soc/intel/boards/sof_sdw_common.h

@@ -197,6 +197,7 @@ int rt712_sdca_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd);
 int rt712_spk_rtd_init(struct snd_soc_pcm_runtime *rtd);
 int rt715_rtd_init(struct snd_soc_pcm_runtime *rtd);
 int rt715_sdca_rtd_init(struct snd_soc_pcm_runtime *rtd);
+int rt_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd);
 int rt_amp_spk_rtd_init(struct snd_soc_pcm_runtime *rtd);
 int rt_sdca_jack_rtd_init(struct snd_soc_pcm_runtime *rtd);
 

sound/soc/intel/boards/sof_sdw_rt_dmic.c

+// 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",
+	"rt712-sdca-dmic",
+};
+
+int rt_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd)
+{
+	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);