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https://codeberg.org/libreboot/lbmk.git
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Leah Rowe
c716341c13
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>
52 lines
1.8 KiB
Diff
52 lines
1.8 KiB
Diff
From c075c12d5549cc6cfaa4fbb6bb3abd5e17503b04 Mon Sep 17 00:00:00 2001
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From: Nicholas Chin <nic.c3.14@gmail.com>
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Date: Mon, 20 May 2024 10:24:16 -0600
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Subject: [PATCH 18/40] mb/dell/e6400: Use 100 MHz reference clock for display
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The E6400 uses a 100 MHz reference clock for spread spectrum support on
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LVDS, whereas libgfxinit previously assumed a 96 MHz input clock. For
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the more common 1280 x 800 display panels, the numerical error was not
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large enough to cause noticable issues, but the actual pixel clock
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frequency derived from a 100 MHz reference using PLL configs calculated
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assuming a 96 MHz reference was not close enough for 1440 x 900 panels,
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which require a much higher pixel clock. This resulted in a garbled
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display in the pre-OS graphics environment provided by libgfxinit.
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Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
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---
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src/mainboard/dell/gm45_latitude/Kconfig | 2 ++
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src/northbridge/intel/gm45/Kconfig | 4 ++++
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2 files changed, 6 insertions(+)
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diff --git a/src/mainboard/dell/gm45_latitude/Kconfig b/src/mainboard/dell/gm45_latitude/Kconfig
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index 98ad18849c..4b026be2ba 100644
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--- a/src/mainboard/dell/gm45_latitude/Kconfig
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+++ b/src/mainboard/dell/gm45_latitude/Kconfig
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@@ -21,6 +21,8 @@ config BOARD_DELL_E6400
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select BOARD_DELL_GM45_LATITUDE_COMMON
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if BOARD_DELL_GM45_LATITUDE_COMMON
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+config INTEL_GMA_DPLL_REF_FREQ
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+ default 100000000
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config MAINBOARD_DIR
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default "dell/gm45_latitude"
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diff --git a/src/northbridge/intel/gm45/Kconfig b/src/northbridge/intel/gm45/Kconfig
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index fef0d735b3..fc5df8b11a 100644
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--- a/src/northbridge/intel/gm45/Kconfig
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+++ b/src/northbridge/intel/gm45/Kconfig
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@@ -14,6 +14,10 @@ config NORTHBRIDGE_INTEL_GM45
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if NORTHBRIDGE_INTEL_GM45
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+config INTEL_GMA_DPLL_REF_FREQ
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+ int
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+ default 96000000
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+
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config VBOOT
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select VBOOT_STARTS_IN_BOOTBLOCK
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--
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2.47.3
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