mb/ocp/deltalake: Override coreboot log level via VPD

Tested=On OCP Delta Lake, log level can be changed via VPD.

Change-Id: I36d4b01b6fb6acc726749641df089cb3f9a4dc3e
Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45326
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>

src/mainboard/ocp/deltalake/Kconfig

@@ -3,6 +3,7 @@ if BOARD_OCP_DELTALAKE
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_65536
+	select CONSOLE_OVERRIDE_LOGLEVEL
 	select HAVE_ACPI_TABLES
 	select MAINBOARD_USES_FSP2_0
 	select SOC_INTEL_COOPERLAKE_SP

src/mainboard/ocp/deltalake/Makefile.inc

@@ -7,6 +7,6 @@ romstage-$(CONFIG_IPMI_KCS_ROMSTAGE) += ipmi.c
 
 ramstage-y += ramstage.c ipmi.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += fadt.c
-
+all-$(CONFIG_CONSOLE_OVERRIDE_LOGLEVEL) += loglevel_vpd.c
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 CPPFLAGS_common += -I$(CONFIG_FSP_HEADER_PATH)

src/mainboard/ocp/deltalake/loglevel_vpd.c

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <drivers/vpd/vpd.h>
+#include <string.h>
+
+#include "vpd.h"
+
+int get_console_loglevel(void)
+{
+	int log_level = COREBOOT_LOG_LEVEL_DEFAULT;
+	char val_str[VPD_LEN];
+
+	if (vpd_gets(COREBOOT_LOG_LEVEL, val_str, VPD_LEN, VPD_RW_THEN_RO)) {
+		log_level = (int)atol(val_str);
+		if (log_level < 0 || log_level >= BIOS_NEVER)
+			log_level = COREBOOT_LOG_LEVEL_DEFAULT;
+	}
+	return log_level;
+}

src/mainboard/ocp/deltalake/vpd.h

@@ -32,4 +32,8 @@
 #define FSP_DCI "fsp_dci_enable" /* 1 or 0: enable or disable DCI */
 #define FSP_DCI_DEFAULT 0 /* Default value when the VPD variable is not found */
 
+/* coreboot log level */
+#define COREBOOT_LOG_LEVEL "coreboot_log_level"
+#define COREBOOT_LOG_LEVEL_DEFAULT 4
+
 #endif