diff options
| author | Leah Rowe <leah@libreboot.org> | 2026-04-23 23:14:25 +0100 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2026-04-23 23:14:25 +0100 |
| commit | f60350344a56fa2b9db2b0653f69a7b036da8aab (patch) | |
| tree | eb8c11369829054eb0ebe5339f0025ab6a8409e5 /config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch | |
| parent | 2ecfe63b5f96331d4d7b8afbee07ba9dbd69ef5d (diff) | |
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch')
| -rw-r--r-- | config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch b/config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch deleted file mode 100644 index 8ed6a3f4..00000000 --- a/config/coreboot/default/patches/0019-mb-dell-e6400-Use-100-MHz-reference-clock-for-displa.patch +++ /dev/null @@ -1,51 +0,0 @@ -From c7b85347f892432b31000c67efccc02c84d9394a Mon Sep 17 00:00:00 2001 -From: Nicholas Chin <nic.c3.14@gmail.com> -Date: Mon, 20 May 2024 10:24:16 -0600 -Subject: [PATCH 19/51] mb/dell/e6400: Use 100 MHz reference clock for display - -The E6400 uses a 100 MHz reference clock for spread spectrum support on -LVDS, whereas libgfxinit previously assumed a 96 MHz input clock. For -the more common 1280 x 800 display panels, the numerical error was not -large enough to cause noticable issues, but the actual pixel clock -frequency derived from a 100 MHz reference using PLL configs calculated -assuming a 96 MHz reference was not close enough for 1440 x 900 panels, -which require a much higher pixel clock. This resulted in a garbled -display in the pre-OS graphics environment provided by libgfxinit. - -Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com> ---- - src/mainboard/dell/gm45_latitude/Kconfig | 2 ++ - src/northbridge/intel/gm45/Kconfig | 4 ++++ - 2 files changed, 6 insertions(+) - -diff --git a/src/mainboard/dell/gm45_latitude/Kconfig b/src/mainboard/dell/gm45_latitude/Kconfig -index edc79b0d43..5020744990 100644 ---- a/src/mainboard/dell/gm45_latitude/Kconfig -+++ b/src/mainboard/dell/gm45_latitude/Kconfig -@@ -22,6 +22,8 @@ config BOARD_DELL_E6400 - select BOARD_DELL_GM45_LATITUDE_COMMON - - if BOARD_DELL_GM45_LATITUDE_COMMON -+config INTEL_GMA_DPLL_REF_FREQ -+ default 100000000 - - config MAINBOARD_DIR - default "dell/gm45_latitude" -diff --git a/src/northbridge/intel/gm45/Kconfig b/src/northbridge/intel/gm45/Kconfig -index a776217475..35e89b0c88 100644 ---- a/src/northbridge/intel/gm45/Kconfig -+++ b/src/northbridge/intel/gm45/Kconfig -@@ -14,6 +14,10 @@ config NORTHBRIDGE_INTEL_GM45 - - if NORTHBRIDGE_INTEL_GM45 - -+config INTEL_GMA_DPLL_REF_FREQ -+ int -+ default 96000000 -+ - config VBOOT - select VBOOT_STARTS_IN_BOOTBLOCK - --- -2.47.3 - |