ASoc: tas2783A: machine driver amp utility for TI devices

Signed-off-by: Niranjan H Y <[email protected]>

Author: niranjanhyti

include/sound/soc_sdw_utils.h

@@ -248,5 +248,13 @@ int asoc_sdw_cs42l43_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_so
 int asoc_sdw_cs42l43_dmic_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai);
 int asoc_sdw_cs_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai);
 int asoc_sdw_maxim_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai);
+/* TI */
+int asoc_sdw_ti_amp_init(struct snd_soc_card *card,
+			 struct snd_soc_dai_link *dai_links,
+			 struct asoc_sdw_codec_info *info,
+			 bool playback);
+int asoc_sdw_ti_spk_rtd_init(struct snd_soc_pcm_runtime *rtd, struct snd_soc_dai *dai);
+int asoc_sdw_ti_amp_initial_settings(struct snd_soc_card *card,
+				     const char *name_prefix);
 
 #endif

sound/soc/sdw_utils/Makefile

@@ -6,5 +6,6 @@ snd-soc-sdw-utils-y := soc_sdw_utils.o soc_sdw_dmic.o soc_sdw_rt_dmic.o \
 		       soc_sdw_bridge_cs35l56.o 			\
 		       soc_sdw_cs42l42.o soc_sdw_cs42l43.o 		\
 		       soc_sdw_cs_amp.o					\
-		       soc_sdw_maxim.o
+		       soc_sdw_maxim.o \
+		       soc_sdw_ti_amp.o
 obj-$(CONFIG_SND_SOC_SDW_UTILS) += snd-soc-sdw-utils.o

sound/soc/sdw_utils/soc_sdw_ti_amp.c

@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2025 Texas Instruments Inc.
+
+/*
+ *  soc_sdw_ti_amp - Helpers to handle TI's soundwire based codecs
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <sound/soc.h>
+#include <sound/soc-acpi.h>
+#include <sound/soc-dai.h>
+#include <sound/soc_sdw_utils.h>
+
+#define TIAMP_SPK_VOLUME_0DB		200
+
+int asoc_sdw_ti_amp_initial_settings(struct snd_soc_card *card,
+				     const char *name_prefix)
+{
+	char *volume_ctl_name;
+	int ret;
+
+	volume_ctl_name = kasprintf(GFP_KERNEL, "%s Speaker Volume",
+				    name_prefix);
+	if (!volume_ctl_name)
+		return -ENOMEM;
+
+	ret = snd_soc_limit_volume(card, volume_ctl_name,
+				   TIAMP_SPK_VOLUME_0DB);
+	if (ret)
+		dev_err(card->dev,
+			"%s update failed %d\n",
+			volume_ctl_name, ret);
+
+	kfree(volume_ctl_name);
+	return 0;
+}
+EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_initial_settings, "SND_SOC_SDW_UTILS");
+
+int asoc_sdw_ti_spk_rtd_init(struct snd_soc_pcm_runtime *rtd,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_card *card = rtd->card;
+	char widget_name[16];
+	char speaker[16];
+	struct snd_soc_dapm_route route = {speaker, NULL, widget_name};
+	struct snd_soc_dai *codec_dai;
+	const char *prefix;
+	int i, ret = 0;
+
+	for_each_rtd_codec_dais(rtd, i, codec_dai) {
+		if (!strstr(codec_dai->name, "tas2783"))
+			continue;
+
+		prefix = codec_dai->component->name_prefix;
+		if (!strncmp(prefix, "tas2783-1", strlen("tas2783-1"))) {
+			strncpy(speaker, "Left Spk", strlen("Left Spk") + 1);
+		} else if (!strncmp(prefix, "tas2783-2", strlen("tas2783-2"))) {
+			strncpy(speaker, "Right Spk", strlen("Right Spk") + 1);
+		} else {
+			ret = -EINVAL;
+			dev_err(card->dev, "unhandled prefix %s", prefix);
+			break;
+		}
+
+		snprintf(widget_name, sizeof(widget_name), "%s SPK", prefix);
+		ret = asoc_sdw_ti_amp_initial_settings(card, prefix);
+		if (ret)
+			return ret;
+
+		ret = snd_soc_dapm_add_routes(&card->dapm, &route, 1);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_NS(asoc_sdw_ti_spk_rtd_init, "SND_SOC_SDW_UTILS");
+
+int asoc_sdw_ti_amp_init(struct snd_soc_card *card,
+			 struct snd_soc_dai_link *dai_links,
+			 struct asoc_sdw_codec_info *info,
+			 bool playback)
+{
+	if (!playback)
+		return 0;
+
+	info->amp_num++;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(asoc_sdw_ti_amp_init, "SND_SOC_SDW_UTILS");
+

sound/soc/sdw_utils/soc_sdw_utils.c

@@ -66,6 +66,12 @@ struct asoc_sdw_codec_info codec_info_list[] = {
 				.dai_name = "tas2783-codec",
 				.dai_type = SOC_SDW_DAI_TYPE_AMP,
 				.dailink = {SOC_SDW_AMP_OUT_DAI_ID, SOC_SDW_AMP_IN_DAI_ID},
+				.init = asoc_sdw_ti_amp_init,
+				.rtd_init = asoc_sdw_ti_spk_rtd_init,
+				.controls = maxim_controls,
+				.num_controls = ARRAY_SIZE(maxim_controls),
+				.widgets = maxim_widgets,
+				.num_widgets = ARRAY_SIZE(maxim_widgets),
 			},
 		},
 		.dai_num = 1,