driver/i2c/max98390: add dsm_param_name

Maxim driver look for "maxim,dsm_param_name" to load dsm parameter file.
dsm param file name consist of {dsm_param_file_name} filled in devicetree,
{MAINBOARD_VENDOR} and {MAINBOARD_PART_NUMBER}.
=> {dsm_param_file_name}_{MAINBOARD_VENDOR}_{MAINBOARD_PART_NUMBER}.bin

BUG=b:197076844
TEST=build, and check ssdt

Change-Id: I006572d6a6ea55298374c688dfd9d877835da82d
Signed-off-by: Wisley Chen <wisley.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57119
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/drivers/i2c/max98390/chip.h

@@ -13,4 +13,5 @@ struct drivers_i2c_max98390_config {
 	const char *r0_calib_key;
 	/* The VPD key of temperature during speaker calibration. */
 	const char *temperature_calib_key;
+	const char *dsm_param_file_name;
 };

src/drivers/i2c/max98390/max98390.c

@@ -25,8 +25,9 @@ static void max98390_fill_ssdt(const struct device *dev)
 		.speed = I2C_SPEED_FAST,
 		.resource = scope,
 	};
-	struct acpi_dp *dp;
+	struct acpi_dp *dp = NULL;
 	uint64_t r0_value, temp_value;
+	char dsm_name[80] = {};
 
 	if (!scope)
 		return;
@@ -58,11 +59,29 @@ static void max98390_fill_ssdt(const struct device *dev)
 			dp = acpi_dp_new_table("_DSD");
 			MAX98390_DP_INT("r0_calib", r0_value);
 			MAX98390_DP_INT("temperature_calib", temp_value);
-			acpi_dp_write(dp);
 			printk(BIOS_INFO, "set dsm_calib properties\n");
 		}
 	}
 
+	if (CONFIG(CHROMEOS_DSM_PARAM_FILE_NAME)) {
+		if (config->dsm_param_file_name) {
+			if (!dp)
+				dp = acpi_dp_new_table("_DSD");
+
+			size_t chars = snprintf(dsm_name, sizeof(dsm_name), "%s_%s_%s.bin",
+					config->dsm_param_file_name, CONFIG_MAINBOARD_VENDOR,
+					CONFIG_MAINBOARD_PART_NUMBER);
+
+			if (chars >= sizeof(dsm_name))
+				printk(BIOS_ERR, "ERROR: String too long in %s\n", __func__);
+
+			acpi_dp_add_string(dp, "maxim,dsm_param_name", dsm_name);
+		}
+	}
+
+	if (dp)
+		acpi_dp_write(dp);
+
 	acpigen_pop_len(); /* Device */
 	acpigen_pop_len(); /* Scope */
 

src/vendorcode/google/chromeos/Kconfig

@@ -70,6 +70,14 @@ config CHROMEOS_DSM_CALIB
 	  to ACPI DSD table in device driver. These parameters will be applied by kernel driver
 	  through device property at boot.
 
+config CHROMEOS_DSM_PARAM_FILE_NAME
+	bool
+	default n
+	help
+	  On some boards, there are different dsm parameter files for Dynamic Speaker
+	  Management (DSM). Enable this config to assign dsm parameters file name in ACPI
+	  SSDT table. Kernel driver uses this to load the DSM parameter file.
+
 config CHROMEOS_CSE_BOARD_RESET_OVERRIDE
 	bool
 	default n