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.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/sound/soc/codecs/es83xx-dsm-common.c b/sound/soc/codecs/es83xx-dsm-common.c
new file mode 100644
index 000000000000..94fd7d54c53b
--- /dev/null
+++ b/sound/soc/codecs/es83xx-dsm-common.c
@@ -0,0 +1,89 @@
+// 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");