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x86: Avoid clearing the VESA display

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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>
This commit is contained in:
Simon Glass 2025-03-15 14:25:30 +00:00 committed by Tom Rini
parent a9ba0080db
commit 899ab6cd52
1 changed files with 5 additions and 1 deletions
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6
arch/x86/lib/bios.c
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@ -231,7 +231,11 @@ 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;