From a6b9e69a21970951252419b5b5fa9c04fabbf1a4 Mon Sep 17 00:00:00 2001 From: Simon Glass 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 --- 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