diff options
Diffstat (limited to 'config/u-boot/x86_64/patches/0002-x86-Avoid-clearing-the-VESA-display.patch')
| -rw-r--r-- | config/u-boot/x86_64/patches/0002-x86-Avoid-clearing-the-VESA-display.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/config/u-boot/x86_64/patches/0002-x86-Avoid-clearing-the-VESA-display.patch b/config/u-boot/x86_64/patches/0002-x86-Avoid-clearing-the-VESA-display.patch new file mode 100644 index 00000000..7fb75772 --- /dev/null +++ b/config/u-boot/x86_64/patches/0002-x86-Avoid-clearing-the-VESA-display.patch @@ -0,0 +1,34 @@ +From a6b9e69a21970951252419b5b5fa9c04fabbf1a4 Mon Sep 17 00:00:00 2001 +From: Simon Glass <sjg@chromium.org> +Date: Tue, 12 Nov 2024 06:59:02 -0700 +Subject: [PATCH 1/2] x86: Avoid clearing the VESA display + +U-Boot clears the display when it starts up, so there is no need to ask +the VESA driver to do this. Fix this and add a comment explaining the +flags. + +Signed-off-by: Simon Glass <sjg@chromium.org> +--- + arch/x86/lib/bios.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/arch/x86/lib/bios.c b/arch/x86/lib/bios.c +index 03f7360032..374f4f20b8 100644 +--- a/arch/x86/lib/bios.c ++++ b/arch/x86/lib/bios.c +@@ -228,7 +228,11 @@ static void vbe_set_graphics(int vesa_mode, struct vesa_state *mode_info) + { + unsigned char *framebuffer; + +- mode_info->video_mode = (1 << 14) | vesa_mode; ++ /* ++ * bit 14 is linear-framebuffer mode ++ * bit 15 means don't clear the display ++ */ ++ mode_info->video_mode = (1 << 14) | (1 << 15) | vesa_mode; + vbe_get_mode_info(mode_info); + + framebuffer = (unsigned char *)(ulong)mode_info->vesa.phys_base_ptr; +-- +2.39.5 + |