mirror of
https://codeberg.org/libreboot/lbmk.git
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Leah Rowe
264928c6cd
This uses the excellent deguard utility, written by the excellent Mate Kukri. A few bugs but it mostly works. Documentation to come shortly, in lbwww.git. Signed-off-by: Leah Rowe <leah@libreboot.org>
46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
From 7c386cbe38fc42c036bd14b9048b13f1a1d45877 Mon Sep 17 00:00:00 2001
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From: Leah Rowe <info@minifree.org>
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Date: Sun, 1 Dec 2024 23:40:08 +0000
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Subject: [PATCH 1/1] t480 hack: turn off the dgpu
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too buggy, in mkukri's testing. just turn it off.
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thanks go to mkukri for showing me how to turn this off.
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as nicholas explained to me, if there's no nvram on this board,
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coreboot can't use a static option table, because that works by
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copying those settings to the nvram.
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so we just have to hardcode for the time being
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Signed-off-by: Leah Rowe <info@minifree.org>
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---
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3rdparty/vboot | 2 +-
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src/mainboard/lenovo/sklkbl_thinkpad/ramstage.c | 4 +++-
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2 files changed, 4 insertions(+), 2 deletions(-)
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diff --git a/3rdparty/vboot b/3rdparty/vboot
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index f1f70f46dc..1f53ea9b7f 160000
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--- a/3rdparty/vboot
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+++ b/3rdparty/vboot
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@@ -1 +1 @@
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-Subproject commit f1f70f46dc5482bb7c654e53ed58d4001e386df2
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+Subproject commit 1f53ea9b7f398884f722fca046129eae5ea6a71c
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diff --git a/src/mainboard/lenovo/sklkbl_thinkpad/ramstage.c b/src/mainboard/lenovo/sklkbl_thinkpad/ramstage.c
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index 9526642c57..bf5da12689 100644
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--- a/src/mainboard/lenovo/sklkbl_thinkpad/ramstage.c
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+++ b/src/mainboard/lenovo/sklkbl_thinkpad/ramstage.c
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@@ -31,7 +31,9 @@ void mainboard_silicon_init_params(FSP_SIL_UPD *params)
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dgfx_vram_id = gpio_get(GPIO_DGFX_VRAM_ID0) | gpio_get(GPIO_DGFX_VRAM_ID1) << 1;
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printk(BIOS_DEBUG, "Discrete GPU present with %s VRAM\n", dgfx_vram_id_str[dgfx_vram_id]);
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- if (get_uint_option("dgpu_enable", 1)) {
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+// if (get_uint_option("dgpu_enable", 1)) {
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+ if (get_uint_option("dgpu_enable", 0)) { // HACK: no option table due to no nvram.
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+ // (turn off the dgpu by default due to bugs)
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printk(BIOS_DEBUG, "Enabling discrete GPU\n");
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// NOTE: i pulled this GPU enable sequence from thin air but it seems to work
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gpio_set(GPIO_1R8VIDEO_AON_ON, 1); // Enable GPU power rail
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--
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2.39.5
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