ASoC: es83xx: add ACPI DSM helper module

Most of the ES83xx codec configuration is exposed in the DSDT table
and accessible via a _DSM method. Start adding basic definitions and
helpers to dump the information.
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Co-developed-by: David Yang <yangxiaohua@everest-semi.com>
Signed-off-by: David Yang <yangxiaohua@everest-semi.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20231202123946.54347-2-hdegoede@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -1076,6 +1076,10 @@ config SND_SOC_ES7134
 config SND_SOC_ES7241
 	tristate "Everest Semi ES7241 CODEC"
 
+config SND_SOC_ES83XX_DSM_COMMON
+	depends on ACPI
+	tristate
+
 config SND_SOC_ES8316
 	tristate "Everest Semi ES8316 CODEC"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -116,6 +116,7 @@ snd-soc-da9055-objs := da9055.o
 snd-soc-dmic-objs := dmic.o
 snd-soc-es7134-objs := es7134.o
 snd-soc-es7241-objs := es7241.o
+snd-soc-es83xx-dsm-common-objs := es83xx-dsm-common.o
 snd-soc-es8316-objs := es8316.o
 snd-soc-es8326-objs := es8326.o
 snd-soc-es8328-objs := es8328.o
@@ -505,6 +506,7 @@ obj-$(CONFIG_SND_SOC_DA9055)	+= snd-soc-da9055.o
 obj-$(CONFIG_SND_SOC_DMIC)	+= snd-soc-dmic.o
 obj-$(CONFIG_SND_SOC_ES7134)	+= snd-soc-es7134.o
 obj-$(CONFIG_SND_SOC_ES7241)	+= snd-soc-es7241.o
+obj-$(CONFIG_SND_SOC_ES83XX_DSM_COMMON)    += snd-soc-es83xx-dsm-common.o
 obj-$(CONFIG_SND_SOC_ES8316)    += snd-soc-es8316.o
 obj-$(CONFIG_SND_SOC_ES8326)    += snd-soc-es8326.o
 obj-$(CONFIG_SND_SOC_ES8328)	+= snd-soc-es8328.o

sound/soc/codecs/es83xx-dsm-common.c

+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Copyright (c) Intel Corporation, 2022
+// Copyright Everest Semiconductor Co.,Ltd
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include "es83xx-dsm-common.h"
+
+/* UUID ("a9800c04-e016-343e-41f4-6bcce70f4332") */
+static const guid_t es83xx_dsm_guid =
+	GUID_INIT(0xa9800c04, 0xe016, 0x343e,
+		  0x41, 0xf4, 0x6b, 0xcc, 0xe7, 0x0f, 0x43, 0x32);
+
+#define ES83xx_DSM_REVID 1
+
+int es83xx_dsm(struct device *dev, int arg, int *value)
+{
+	acpi_handle dhandle;
+	union acpi_object *obj;
+	int ret = 0;
+
+	dhandle = ACPI_HANDLE(dev);
+	if (!dhandle)
+		return -ENOENT;
+
+	obj = acpi_evaluate_dsm(dhandle, &es83xx_dsm_guid, ES83xx_DSM_REVID,
+				arg, NULL);
+	if (!obj) {
+		dev_err(dev, "%s: acpi_evaluate_dsm() failed\n", __func__);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (obj->type != ACPI_TYPE_INTEGER) {
+		dev_err(dev, "%s: object is not ACPI_TYPE_INTEGER\n", __func__);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	*value = obj->integer.value;
+err:
+	ACPI_FREE(obj);
+out:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(es83xx_dsm);
+
+int es83xx_dsm_dump(struct device *dev)
+{
+	int value;
+	int ret;
+
+	ret = es83xx_dsm(dev, PLATFORM_MAINMIC_TYPE_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_MAINMIC_TYPE %#x\n", value);
+
+	ret = es83xx_dsm(dev, PLATFORM_HPMIC_TYPE_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_HPMIC_TYPE %#x\n", value);
+
+	ret = es83xx_dsm(dev, PLATFORM_SPK_TYPE_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_SPK_TYPE %#x\n", value);
+
+	ret = es83xx_dsm(dev, PLATFORM_HPDET_INV_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_HPDET_INV %#x\n", value);
+
+	ret = es83xx_dsm(dev, PLATFORM_PCM_TYPE_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_PCM_TYPE %#x\n", value);
+
+	ret = es83xx_dsm(dev, PLATFORM_MIC_DE_POP_ARG, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(dev, "PLATFORM_MIC_DE_POP %#x\n", value);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(es83xx_dsm_dump);
+
+MODULE_DESCRIPTION("Everest Semi ES83xx DSM helpers");
+MODULE_LICENSE("GPL");