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SeaVGABios/cbvga: Advertise correct pixel format

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Accumulate the pixel format's bits instead relying on coreboot's
bits_per_pixel, which says nothing about the active pixel format.

Allows VBE to correctly advertise XRGB8 and BGRX8 framebuffer formats,
commonly used by coreboot.

Fixes at least Windows Bootloader and gfxboot.

Signed-off-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Patrick Rudolph
2017-05-29 19:25:10 +02:00
committed by Kevin O'Connor
parent 58953eb793
commit 4b42cc4b31
1 changed files with 3 additions and 1 deletions
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vgasrc/cbvga.c
+3 -1
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@@ -1,6 +1,7 @@
// Simple framebuffer vgabios for use with coreboot native vga init.
//
// Copyright (C) 2014 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
@@ -164,7 +165,8 @@ cbvga_setup(void)
}
u64 addr = GET_FARVAR(0, cbfb->physical_address);
u8 bpp = GET_FARVAR(0, cbfb->bits_per_pixel);
u8 bpp = cbfb->blue_mask_size + cbfb->green_mask_size
+ cbfb->red_mask_size + cbfb->reserved_mask_size;
u32 xlines = GET_FARVAR(0, cbfb->x_resolution);
u32 ylines = GET_FARVAR(0, cbfb->y_resolution);
u32 linelength = GET_FARVAR(0, cbfb->bytes_per_line);