experimental/unstable t480 thunderbolt support

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/coreboot/next/patches/0010-drivers-intel-dtbt-Add-discrete-Thunderbolt-driver.patch

@@ -0,0 +1,265 @@
+From 0db8646d574c07c40793bad5e5ab768da6161628 Mon Sep 17 00:00:00 2001
+From: Jeremy Soller <jeremy@system76.com>
+Date: Thu, 5 Dec 2024 20:35:23 +0000
+Subject: [PATCH 1/2] drivers/intel/dtbt: Add discrete Thunderbolt driver
+
+Add a new driver for discrete Thunderbolt controllers. This allows using
+e.g. Maple Ridge devices on Raptor Point PCH.
+
+Ref: Titan Ridge BIOS Implementation Guide v1.4
+Ref: Maple Ridge BIOS Implementation Guide v1.6 (#632472)
+Change-Id: Ib78ce43740956fa2c93b9ebddb0eeb319dcc0364
+Signed-off-by: Jeremy Soller <jeremy@system76.com>
+Signed-off-by: Tim Crawford <tcrawford@system76.com>
+---
+ src/drivers/intel/dtbt/Kconfig     |   4 +
+ src/drivers/intel/dtbt/Makefile.mk |   3 +
+ src/drivers/intel/dtbt/chip.h      |   8 ++
+ src/drivers/intel/dtbt/dtbt.c      | 199 +++++++++++++++++++++++++++++
+ 4 files changed, 214 insertions(+)
+ create mode 100644 src/drivers/intel/dtbt/Kconfig
+ create mode 100644 src/drivers/intel/dtbt/Makefile.mk
+ create mode 100644 src/drivers/intel/dtbt/chip.h
+ create mode 100644 src/drivers/intel/dtbt/dtbt.c
+
+diff --git a/src/drivers/intel/dtbt/Kconfig b/src/drivers/intel/dtbt/Kconfig
+new file mode 100644
+index 0000000000..5c03a97db9
+--- /dev/null
++++ b/src/drivers/intel/dtbt/Kconfig
+@@ -0,0 +1,4 @@
++config DRIVERS_INTEL_DTBT
++	def_bool n
++	help
++	  Support for discrete Thunderbolt controllers
+diff --git a/src/drivers/intel/dtbt/Makefile.mk b/src/drivers/intel/dtbt/Makefile.mk
+new file mode 100644
+index 0000000000..1b5252dda0
+--- /dev/null
++++ b/src/drivers/intel/dtbt/Makefile.mk
+@@ -0,0 +1,3 @@
++# SPDX-License-Identifier: GPL-2.0-only
++
++ramstage-$(CONFIG_DRIVERS_INTEL_DTBT) += dtbt.c
+diff --git a/src/drivers/intel/dtbt/chip.h b/src/drivers/intel/dtbt/chip.h
+new file mode 100644
+index 0000000000..2b1dfa70a5
+--- /dev/null
++++ b/src/drivers/intel/dtbt/chip.h
+@@ -0,0 +1,8 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#ifndef _DRIVERS_INTEL_DTBT_CHIP_H_
++#define _DRIVERS_INTEL_DTBT_CHIP_H_
++
++struct drivers_intel_dtbt_config {};
++
++#endif /* _DRIVERS_INTEL_DTBT_CHIP_H_ */
+diff --git a/src/drivers/intel/dtbt/dtbt.c b/src/drivers/intel/dtbt/dtbt.c
+new file mode 100644
+index 0000000000..a54f0e213d
+--- /dev/null
++++ b/src/drivers/intel/dtbt/dtbt.c
+@@ -0,0 +1,199 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include "chip.h"
++#include <acpi/acpigen.h>
++#include <console/console.h>
++#include <delay.h>
++#include <device/device.h>
++#include <device/pci.h>
++#include <device/pciexp.h>
++#include <device/pci_ids.h>
++#include <timer.h>
++
++#define PCIE2TBT 0x54C
++#define PCIE2TBT_VALID BIT(0)
++#define PCIE2TBT_GO2SX			2
++#define PCIE2TBT_GO2SX_NO_WAKE		3
++#define PCIE2TBT_SX_EXIT_TBT_CONNECTED	4
++#define PCIE2TBT_OS_UP			6
++#define PCIE2TBT_SET_SECURITY_LEVEL	8
++#define PCIE2TBT_GET_SECURITY_LEVEL	9
++#define PCIE2TBT_BOOT_ON		24
++#define PCIE2TBT_USB_ON			25
++#define PCIE2TBT_GET_ENUMERATION_METHOD	26
++#define PCIE2TBT_SET_ENUMERATION_METHOD	27
++#define PCIE2TBT_POWER_CYCLE		28
++#define PCIE2TBT_SX_START		29
++#define PCIE2TBT_ACL_BOOT		30
++#define PCIE2TBT_CONNECT_TOPOLOGY	31
++
++#define TBT2PCIE 0x548
++#define TBT2PCIE_DONE BIT(0)
++
++// Default timeout for mailbox commands unless otherwise specified.
++#define TIMEOUT_MS 1000
++// Default timeout for controller to ack GO2SX/GO2SX_NO_WAKE mailbox command.
++#define GO2SX_TIMEOUT_MS 600
++
++static void dtbt_cmd(struct device *dev, u32 command, u32 data, u32 timeout)
++{
++	u32 reg = (data << 8) | (command << 1) | PCIE2TBT_VALID;
++	u32 status;
++
++	printk(BIOS_DEBUG, "dTBT send command %08x\n", command);
++	pci_write_config32(dev, PCIE2TBT, reg);
++
++	if (!wait_ms(timeout, (status = pci_read_config32(dev, TBT2PCIE)) & TBT2PCIE_DONE)) {
++		printk(BIOS_ERR, "dTBT command %08x send timeout %08x\n", command, status);
++	}
++
++	pci_write_config32(dev, PCIE2TBT, 0);
++	if (!wait_ms(timeout, !(pci_read_config32(dev, TBT2PCIE) & TBT2PCIE_DONE))) {
++		printk(BIOS_ERR, "dTBT command %08x clear timeout\n", command);
++	}
++}
++
++static void dtbt_write_dsd(void)
++{
++	struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
++
++	acpi_device_add_hotplug_support_in_d3(dsd);
++	acpi_device_add_external_facing_port(dsd);
++	acpi_dp_write(dsd);
++}
++
++static void dtbt_write_opregion(const struct bus *bus)
++{
++	uintptr_t mmconf_base = (uintptr_t)CONFIG_ECAM_MMCONF_BASE_ADDRESS
++			+ (((uintptr_t)(bus->secondary)) << 20);
++	const struct opregion opregion = OPREGION("PXCS", SYSTEMMEMORY, mmconf_base, 0x1000);
++	const struct fieldlist fieldlist[] = {
++		FIELDLIST_OFFSET(TBT2PCIE),
++		FIELDLIST_NAMESTR("TB2P", 32),
++		FIELDLIST_OFFSET(PCIE2TBT),
++		FIELDLIST_NAMESTR("P2TB", 32),
++	};
++
++	acpigen_write_opregion(&opregion);
++	acpigen_write_field("PXCS", fieldlist, ARRAY_SIZE(fieldlist),
++			    FIELD_DWORDACC | FIELD_NOLOCK | FIELD_PRESERVE);
++}
++
++static void dtbt_fill_ssdt(const struct device *dev)
++{
++	struct bus *bus;
++	struct device *parent;
++	const char *parent_scope;
++	const char *dev_name = acpi_device_name(dev);
++
++	bus = dev->upstream;
++	if (!bus) {
++		printk(BIOS_ERR, "dTBT bus invalid\n");
++		return;
++	}
++
++	parent = bus->dev;
++	if (!parent || parent->path.type != DEVICE_PATH_PCI) {
++		printk(BIOS_ERR, "dTBT parent invalid\n");
++		return;
++	}
++
++	parent_scope = acpi_device_path(parent);
++	if (!parent_scope) {
++		printk(BIOS_ERR, "dTBT parent scope not valid\n");
++		return;
++	}
++
++	/* Scope */
++	acpigen_write_scope(parent_scope);
++	dtbt_write_dsd();
++
++	/* Device */
++	acpigen_write_device(dev_name);
++	acpigen_write_name_integer("_ADR", 0);
++	dtbt_write_opregion(bus);
++
++	/* Method */
++	acpigen_write_method_serialized("PTS", 0);
++
++	acpigen_write_debug_string("dTBT prepare to sleep");
++	acpigen_write_store_int_to_namestr(PCIE2TBT_GO2SX_NO_WAKE << 1, "P2TB");
++	acpigen_write_delay_until_namestr_int(GO2SX_TIMEOUT_MS, "TB2P", PCIE2TBT_GO2SX_NO_WAKE << 1);
++
++	acpigen_write_debug_namestr("TB2P");
++	acpigen_write_store_int_to_namestr(0, "P2TB");
++	acpigen_write_delay_until_namestr_int(GO2SX_TIMEOUT_MS, "TB2P", 0);
++	acpigen_write_debug_namestr("TB2P");
++
++	acpigen_write_method_end();
++	acpigen_write_device_end();
++	acpigen_write_scope_end();
++
++	printk(BIOS_DEBUG, "dTBT fill SSDT\n");
++	printk(BIOS_DEBUG, "  Dev %s\n", dev_path(dev));
++	//printk(BIOS_DEBUG, "  Bus %s\n", bus_path(bus));
++	printk(BIOS_DEBUG, "  Parent %s\n", dev_path(parent));
++	printk(BIOS_DEBUG, "  Scope %s\n", parent_scope);
++	printk(BIOS_DEBUG, "    Device %s\n", dev_name);
++
++	// \.TBTS Method
++	acpigen_write_scope("\\");
++	acpigen_write_method("TBTS", 0);
++	acpigen_emit_namestring(acpi_device_path_join(dev, "PTS"));
++	acpigen_write_method_end();
++	acpigen_write_scope_end();
++}
++
++static const char *dtbt_acpi_name(const struct device *dev)
++{
++	return "DTBT";
++}
++
++static struct pci_operations dtbt_device_ops_pci = {
++	.set_subsystem = 0,
++};
++
++static struct device_operations dtbt_device_ops = {
++	.read_resources   = pci_bus_read_resources,
++	.set_resources    = pci_dev_set_resources,
++	.enable_resources = pci_bus_enable_resources,
++	.acpi_fill_ssdt   = dtbt_fill_ssdt,
++	.acpi_name        = dtbt_acpi_name,
++	.scan_bus         = pciexp_scan_bridge,
++	.reset_bus        = pci_bus_reset,
++	.ops_pci          = &dtbt_device_ops_pci,
++};
++
++static void dtbt_enable(struct device *dev)
++{
++	if (!is_dev_enabled(dev) || dev->path.type != DEVICE_PATH_PCI)
++		return;
++
++	if (pci_read_config16(dev, PCI_VENDOR_ID) != PCI_VID_INTEL)
++		return;
++
++	// TODO: check device ID
++
++	dev->ops = &dtbt_device_ops;
++
++	printk(BIOS_INFO, "dTBT controller found at %s\n", dev_path(dev));
++
++	// XXX: Recommendation is to set SL1 ("User Authorization")
++	printk(BIOS_DEBUG, "dTBT set security level SL0\n");
++	dtbt_cmd(dev, PCIE2TBT_SET_SECURITY_LEVEL, 0, TIMEOUT_MS);
++	// XXX: Must verify change or rollback all controllers
++
++	if (acpi_is_wakeup_s3()) {
++		printk(BIOS_DEBUG, "dTBT SX exit\n");
++		dtbt_cmd(dev, PCIE2TBT_SX_EXIT_TBT_CONNECTED, 0, TIMEOUT_MS);
++		// TODO: "wait for fast link bring-up" loop (timeout: 5s)
++	} else {
++		printk(BIOS_DEBUG, "dTBT boot on\n");
++		dtbt_cmd(dev, PCIE2TBT_BOOT_ON, 0, TIMEOUT_MS);
++	}
++}
++
++struct chip_operations drivers_intel_dtbt_ops = {
++	.name = "Intel Discrete Thunderbolt",
++	.enable_dev = dtbt_enable,
++};
+-- 
+2.39.5
+

config/coreboot/next/patches/0011-thunderbolt-fix-ish.patch

@@ -0,0 +1,136 @@
+From dbc0c75d666045eb0716e2ad0656a29b562c8f66 Mon Sep 17 00:00:00 2001
+From: Mate Kukri <km@mkukri.xyz>
+Date: Thu, 5 Dec 2024 20:42:40 +0000
+Subject: [PATCH 2/2] thunderbolt fix-ish
+
+it shows up, but resume is no dice.
+
+Change-Id: I2d91a1d290b35e7ea3a1193b4be7b4ba936e4a15
+---
+ src/mainboard/lenovo/sklkbl_thinkpad/Kconfig        |  1 +
+ src/mainboard/lenovo/sklkbl_thinkpad/dsdt.asl       | 13 +++++++++++++
+ .../lenovo/sklkbl_thinkpad/variants/t480/gpio.c     |  8 ++++----
+ .../sklkbl_thinkpad/variants/t480/overridetree.cb   |  4 ++++
+ .../lenovo/sklkbl_thinkpad/variants/t480s/gpio.c    |  8 ++++----
+ .../sklkbl_thinkpad/variants/t480s/overridetree.cb  |  4 ++++
+ 6 files changed, 30 insertions(+), 8 deletions(-)
+
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig b/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
+index 21076315ab..0766c03716 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/Kconfig
+@@ -19,6 +19,7 @@ config BOARD_LENOVO_SKLKBL_THINKPAD_COMMON
+ 	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
+ 	select SPD_READ_BY_WORD
+ 	select SYSTEM_TYPE_LAPTOP
++	select DRIVERS_INTEL_DTBT
+ 
+ config BOARD_LENOVO_E460
+ 	bool
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/dsdt.asl b/src/mainboard/lenovo/sklkbl_thinkpad/dsdt.asl
+index 237500775f..849540d32d 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/dsdt.asl
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/dsdt.asl
+@@ -35,4 +35,17 @@ DefinitionBlock(
+ 	}
+ 
+ 	#include <southbridge/intel/common/acpi/sleepstates.asl>
++
++	Scope (\_SB)
++	{
++		External (\TBTS, MethodObj)
++
++		Method (MPTS, 1, Serialized)
++		{
++			If (CondRefOf (\TBTS))
++			{
++				\TBTS()
++			}
++		}
++	}
+ }
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
+index f7c29e1f39..edfa09fbb7 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/gpio.c
+@@ -86,7 +86,7 @@ static const struct pad_config gpio_table[] = {
+ 	PAD_NC(GPP_C18, NONE),
+ 	PAD_NC(GPP_C19, NONE),
+ 	PAD_CFG_GPO(GPP_C20, 0, DEEP),					/* EPRIVACY_ON */
+-	PAD_CFG_GPO(GPP_C21, 0, DEEP),					/* TBT_FORCE_PWR */
++	PAD_CFG_GPO(GPP_C21, 1, DEEP),					/* TBT_FORCE_PWR */
+ 	PAD_CFG_GPI_SCI(GPP_C22, NONE, DEEP, EDGE_SINGLE, INVERT),	/* -EC_SCI */
+ 	PAD_CFG_GPI_SCI(GPP_C23, NONE, DEEP, EDGE_SINGLE, INVERT),	/* -EC_WAKE */
+ 
+@@ -191,9 +191,9 @@ static const struct pad_config gpio_table[] = {
+ 	PAD_NC(GPP_G1, NONE),
+ 	PAD_NC(GPP_G2, NONE),
+ 	PAD_NC(GPP_G3, NONE),
+-	PAD_CFG_GPO(GPP_G4, 0, DEEP),					/* TBT_RTD3_PWR_EN */
+-	PAD_CFG_GPO(GPP_G5, 0, DEEP),					/* TBT_FORCE_USB_PWR */
+-	PAD_CFG_GPO(GPP_G6, 0, DEEP),					/* -TBT_PERST */
++	PAD_CFG_GPO(GPP_G4, 1, DEEP),					/* TBT_RTD3_PWR_EN */
++	PAD_CFG_GPO(GPP_G5, 1, DEEP),					/* TBT_FORCE_USB_PWR (TBT_RTD3_USB_PWR_EN) */
++	PAD_CFG_GPO(GPP_G6, 1, DEEP),					/* -TBT_PERST */
+ 	PAD_CFG_GPI_SCI(GPP_G7, NONE, DEEP, LEVEL, INVERT),		/* -TBT_PCIE_WAKE */
+ };
+ 
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/overridetree.cb b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/overridetree.cb
+index 2f0b20d91a..6d8725ad5a 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/overridetree.cb
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480/overridetree.cb
+@@ -106,6 +106,10 @@ chip soc/intel/skylake
+ 			register "PcieRpAdvancedErrorReporting[8]"	= "1"
+ 			register "PcieRpLtrEnable[8]"			= "1"
+ 			register "PcieRpHotPlug[8]"			= "1"
++
++			chip drivers/intel/dtbt
++				device pci 0.0 on end
++			end
+ 		end
+ 
+ 		# M.2 2280 caddy - x2
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
+index a98dd2bc4e..732917ebfa 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/gpio.c
+@@ -82,7 +82,7 @@ static const struct pad_config gpio_table[] = {
+ 	PAD_NC(GPP_C18, NONE),
+ 	PAD_NC(GPP_C19, NONE),
+ 	PAD_CFG_GPO(GPP_C20, 0, DEEP),					/* EPRIVACY_ON */
+-	PAD_CFG_GPO(GPP_C21, 0, DEEP),					/* TBT_FORCE_PWR */
++	PAD_CFG_GPO(GPP_C21, 1, DEEP),					/* TBT_FORCE_PWR */
+ 	PAD_CFG_GPI_SCI(GPP_C22, NONE, DEEP, EDGE_SINGLE, INVERT),	/* -EC_SCI */
+ 	PAD_CFG_GPI_SCI(GPP_C23, NONE, DEEP, EDGE_SINGLE, INVERT),	/* -EC_WAKE */
+ 
+@@ -187,9 +187,9 @@ static const struct pad_config gpio_table[] = {
+ 	PAD_NC(GPP_G1, NONE),
+ 	PAD_NC(GPP_G2, NONE),
+ 	PAD_NC(GPP_G3, NONE),
+-	PAD_CFG_GPO(GPP_G4, 0, DEEP),					/* TBT_RTD3_PWR_EN */
+-	PAD_CFG_GPO(GPP_G5, 0, DEEP),					/* TBT_FORCE_USB_PWR */
+-	PAD_CFG_GPO(GPP_G6, 0, DEEP),					/* -TBT_PERST */
++	PAD_CFG_GPO(GPP_G4, 1, DEEP),					/* TBT_RTD3_PWR_EN */
++	PAD_CFG_GPO(GPP_G5, 1, DEEP),					/* TBT_FORCE_USB_PWR (TBT_RTD3_USB_PWR_EN) */
++	PAD_CFG_GPO(GPP_G6, 1, DEEP),					/* -TBT_PERST */
+ 	PAD_CFG_GPI_SCI(GPP_G7, NONE, DEEP, LEVEL, INVERT),		/* -TBT_PCIE_WAKE */
+ };
+ 
+diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/overridetree.cb b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/overridetree.cb
+index cea5e485d2..9b952215c5 100644
+--- a/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/overridetree.cb
++++ b/src/mainboard/lenovo/sklkbl_thinkpad/variants/t480s/overridetree.cb
+@@ -106,6 +106,10 @@ chip soc/intel/skylake
+ 			register "PcieRpAdvancedErrorReporting[4]"	= "1"
+ 			register "PcieRpLtrEnable[4]"			= "1"
+ 			register "PcieRpHotPlug[4]"			= "1"
++
++			chip drivers/intel/dtbt
++				device pci 0.0 on end
++			end
+ 		end
+ 
+ 		# M.2 2280 SSD - x2
+-- 
+2.39.5
+

config/coreboot/t480_fsp_16mb/config/libgfxinit_corebootfb

@@ -115,7 +115,7 @@ CONFIG_MAINBOARD_VERSION="1.0"
 CONFIG_MAINBOARD_DIR="lenovo/sklkbl_thinkpad"
 CONFIG_VGA_BIOS_ID="8086,0406"
 CONFIG_DIMM_MAX=2
-CONFIG_DIMM_SPD_SIZE=256
+CONFIG_DIMM_SPD_SIZE=512
 CONFIG_FMDFILE=""
 # CONFIG_NO_POST is not set
 CONFIG_MAINBOARD_VENDOR="LENOVO"
@@ -625,6 +625,7 @@ CONFIG_DRIVERS_UART=y
 # CONFIG_DRIVERS_GENESYSLOGIC_GL9763E is not set
 CONFIG_DRIVERS_I2C_DESIGNWARE=y
 # CONFIG_DRIVERS_I2C_MAX98396 is not set
+CONFIG_DRIVERS_INTEL_DTBT=y
 CONFIG_FSP_USE_REPO=y
 # CONFIG_DISPLAY_HOBS is not set
 # CONFIG_DISPLAY_UPD_DATA is not set

config/coreboot/t480_fsp_16mb/config/libgfxinit_txtmode

@@ -115,7 +115,7 @@ CONFIG_MAINBOARD_VERSION="1.0"
 CONFIG_MAINBOARD_DIR="lenovo/sklkbl_thinkpad"
 CONFIG_VGA_BIOS_ID="8086,0406"
 CONFIG_DIMM_MAX=2
-CONFIG_DIMM_SPD_SIZE=256
+CONFIG_DIMM_SPD_SIZE=512
 CONFIG_FMDFILE=""
 # CONFIG_NO_POST is not set
 CONFIG_MAINBOARD_VENDOR="LENOVO"
@@ -617,6 +617,7 @@ CONFIG_DRIVERS_UART=y
 # CONFIG_DRIVERS_GENESYSLOGIC_GL9763E is not set
 CONFIG_DRIVERS_I2C_DESIGNWARE=y
 # CONFIG_DRIVERS_I2C_MAX98396 is not set
+CONFIG_DRIVERS_INTEL_DTBT=y
 CONFIG_FSP_USE_REPO=y
 # CONFIG_DISPLAY_HOBS is not set
 # CONFIG_DISPLAY_UPD_DATA is not set

config/coreboot/t480s_fsp_16mb/config/libgfxinit_corebootfb

@@ -115,7 +115,7 @@ CONFIG_MAINBOARD_VERSION="1.0"
 CONFIG_MAINBOARD_DIR="lenovo/sklkbl_thinkpad"
 CONFIG_VGA_BIOS_ID="8086,0406"
 CONFIG_DIMM_MAX=2
-CONFIG_DIMM_SPD_SIZE=256
+CONFIG_DIMM_SPD_SIZE=512
 CONFIG_FMDFILE=""
 # CONFIG_NO_POST is not set
 CONFIG_MAINBOARD_VENDOR="LENOVO"
@@ -625,6 +625,7 @@ CONFIG_DRIVERS_UART=y
 # CONFIG_DRIVERS_GENESYSLOGIC_GL9763E is not set
 CONFIG_DRIVERS_I2C_DESIGNWARE=y
 # CONFIG_DRIVERS_I2C_MAX98396 is not set
+CONFIG_DRIVERS_INTEL_DTBT=y
 CONFIG_FSP_USE_REPO=y
 # CONFIG_DISPLAY_HOBS is not set
 # CONFIG_DISPLAY_UPD_DATA is not set

config/coreboot/t480s_fsp_16mb/config/libgfxinit_txtmode

@@ -115,7 +115,7 @@ CONFIG_MAINBOARD_VERSION="1.0"
 CONFIG_MAINBOARD_DIR="lenovo/sklkbl_thinkpad"
 CONFIG_VGA_BIOS_ID="8086,0406"
 CONFIG_DIMM_MAX=2
-CONFIG_DIMM_SPD_SIZE=256
+CONFIG_DIMM_SPD_SIZE=512
 CONFIG_FMDFILE=""
 # CONFIG_NO_POST is not set
 CONFIG_MAINBOARD_VENDOR="LENOVO"
@@ -617,6 +617,7 @@ CONFIG_DRIVERS_UART=y
 # CONFIG_DRIVERS_GENESYSLOGIC_GL9763E is not set
 CONFIG_DRIVERS_I2C_DESIGNWARE=y
 # CONFIG_DRIVERS_I2C_MAX98396 is not set
+CONFIG_DRIVERS_INTEL_DTBT=y
 CONFIG_FSP_USE_REPO=y
 # CONFIG_DISPLAY_HOBS is not set
 # CONFIG_DISPLAY_UPD_DATA is not set