cb/kabylake: don't hardcode power_on_after_fail

I realised that the Dell OptiPlex 3050 Micro has NVRAM available.
Use that backend, and hardcode power_on_after_fail to Disable,
which is already done in cmos.default.

The Lenovo ThinkPad T480 currently has no option table in coreboot,
besides the CBFS one. For this, the CBFS option table has been
enabled, and the build system has been modified to insert
a relevant config for power_on_after_fail.

Nicholas Chin informs me that Kabylake generally has legacy NVRAM,
so enabling it for the T480/T480s should work, but we'll need
to use it in the future anyway; better to just use CBFS now.

I *could* use the CBFS backend on 3050micro as well.

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

1 files changed, 106 insertions, 0 deletions

diff --git a/config/coreboot/default/patches/0035-mb-topton-adl-Add-TWL-variant-X2E_N150.patch b/config/coreboot/default/patches/0035-mb-topton-adl-Add-TWL-variant-X2E_N150.patch
new file mode 100644
index 00000000..1edd0d27
--- /dev/null
+++ b/config/coreboot/default/patches/0035-mb-topton-adl-Add-TWL-variant-X2E_N150.patch
@@ -0,0 +1,106 @@
+From 0a98ff0cbd20484ced53b15f16f8b77d881ffb9e Mon Sep 17 00:00:00 2001
+From: Riku Viitanen <riku.viitanen@protonmail.com>
+Date: Thu, 25 Sep 2025 22:45:37 +0300
+Subject: [PATCH 35/40] mb/topton/adl: Add TWL variant (X2E_N150)
+
+Seems to be the same board but with a Twin Lake processor.
+VBT extracted from vendor firmware. This makes HDMI and
+DisplayPort work.
+
+Change-Id: I1018042802cbb8010888847226a2117fd9dfaeb0
+Signed-off-by: Riku Viitanen <riku.viitanen@protonmail.com>
+---
+ src/mainboard/topton/adl/Kconfig      |  12 +++++++++---
+ src/mainboard/topton/adl/Kconfig.name |   3 +++
+ src/mainboard/topton/adl/data_twl.vbt | Bin 0 -> 9216 bytes
+ 3 files changed, 12 insertions(+), 3 deletions(-)
+ create mode 100644 src/mainboard/topton/adl/data_twl.vbt
+
+diff --git a/src/mainboard/topton/adl/Kconfig b/src/mainboard/topton/adl/Kconfig
+index ffdfae1eee..331e1d624d 100644
+--- a/src/mainboard/topton/adl/Kconfig
++++ b/src/mainboard/topton/adl/Kconfig
+@@ -1,6 +1,6 @@
+ ## SPDX-License-Identifier: GPL-2.0-or-later
+ 
+-if BOARD_TOPTON_X2F_N100
++if BOARD_TOPTON_X2F_N100 || BOARD_TOPTON_X2E_N150
+ 
+ config BOARD_SPECIFIC_OPTIONS
+ 	def_bool y
+@@ -12,6 +12,7 @@ config BOARD_SPECIFIC_OPTIONS
+ 	select SUPERIO_ITE_IT8625E
+ 	select DRIVERS_UART_8250IO
+ 	select SOC_INTEL_ALDERLAKE_PCH_N
++	select SOC_INTEL_TWINLAKE if BOARD_TOPTON_X2E_N150
+ 	select INTEL_GMA_HAVE_VBT
+ 	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
+ 	select HAVE_INTEL_PTT
+@@ -20,7 +21,12 @@ config BOARD_SPECIFIC_OPTIONS
+ config MAINBOARD_DIR
+ 	default "topton/adl"
+ 
++config INTEL_GMA_VBT_FILE
++	default "src/mainboard/\$(MAINBOARDDIR)/data.vbt" if BOARD_TOPTON_X2F_N100
++	default "src/mainboard/\$(MAINBOARDDIR)/data_twl.vbt" if BOARD_TOPTON_X2E_N150
++
+ config MAINBOARD_PART_NUMBER
+-	default "X2F_N100"
++	default "X2F_N100" if BOARD_TOPTON_X2F_N100
++	default "X2E_N150" if BOARD_TOPTON_X2E_N150
+ 
+-endif # BOARD_TOPTON_X2F_N100
++endif # BOARD_TOPTON_X2F_N100 || BOARD_TOPTON_X2E_N150
+diff --git a/src/mainboard/topton/adl/Kconfig.name b/src/mainboard/topton/adl/Kconfig.name
+index 5b8b5ff602..db0eef29be 100644
+--- a/src/mainboard/topton/adl/Kconfig.name
++++ b/src/mainboard/topton/adl/Kconfig.name
+@@ -2,3 +2,6 @@
+ 
+ config BOARD_TOPTON_X2F_N100
+ 	bool "X2F_N100"
++
++config BOARD_TOPTON_X2E_N150
++	bool "X2E_N150"
+diff --git a/src/mainboard/topton/adl/data_twl.vbt b/src/mainboard/topton/adl/data_twl.vbt
+new file mode 100644
+index 0000000000000000000000000000000000000000..05fbd5807365b3343e55ecedbd12fabb8a3199e9
+GIT binary patch
+literal 9216
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+
+literal 0
+HcmV?d00001
+
+-- 
+2.47.3
+