User:GNUtoo/External GPU init without running the option rom: Difference between revisions
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(Created page with " The idea is to keep the option rom in memory while making SeaBIOS not run it. This has the effect of permitting linux(-libre) to initalize the GPU on all AMD/ATI and Nvidia G...") |
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Latest revision as of 12:35, 10 May 2018
The idea is to keep the option rom in memory while making SeaBIOS not run it. This has the effect of permitting linux(-libre) to initalize the GPU on all AMD/ATI and Nvidia GPU I tried it with. The downside is the lack of graphics before that. That means no graphics in GRUB.
Patch
From 73aae33b7e70d15b595b3f127ffe98bd76f9a646 Mon Sep 17 00:00:00 2001 From: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org> Date: Sat, 7 Mar 2015 15:39:52 +0100 Subject: [PATCH] Kconfig: Add option not to run option roms Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org> --- src/Kconfig | 8 ++++++++ src/optionroms.c | 2 ++ 2 files changed, 10 insertions(+) diff --git a/src/Kconfig b/src/Kconfig index 95bf087..1988f56 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -403,6 +403,14 @@ menu "BIOS interfaces" default y help Support Post Memory Manager (PMM) entry point. + config OPTIONROMS_NORUN + depends on OPTIONROMS + bool "Put the option roms in memory, but don't run them" + default n + help + Some GPU drivers are capable of initializing the display alone, + but they still require some data from the option rom. + config BOOT bool "Boot interface" default y diff --git a/src/optionroms.c b/src/optionroms.c index c81eff2..c7c89da 100644 --- a/src/optionroms.c +++ b/src/optionroms.c @@ -53,7 +53,9 @@ __callrom(struct rom_header *rom, u16 offset, u16 bdf) void callrom(struct rom_header *rom, u16 bdf) { +#if (!CONFIG_OPTIONROMS_NORUN) __callrom(rom, OPTION_ROM_INITVECTOR, bdf); +#endif } // Execute a BCV option rom registered via add_bcv(). -- 2.6.4