[SeaBIOS] [PATCH 0/4] SeaVGABIOS improvments for coreboot's framebuffer

[Patrick Rudolph]

This series add several fixes to coreboot's framebuffer implementation 
and it main purpose is to fix Microsoft's Windows as supported OS.

The series fixes the following issues:
* Windows shows no image in text-mode
* Windows NTLDR/bootmgr shows no image in VESA mode
* Windows shows no image in VESA mode

I was able to boot Windows using VgaSave driver in text-mode with a
fixed display resolution of 640x480 at 4Bpp.

I was able to boot Windows using VgaSave driver in VESA mode and
set a display resolution up to 1600x1200 at 24Bpp.

Most likely other VESA compatible bootloaders and operating systems
will be fixed, too.

While most issues are fixed, one critical remains:
Windows replaces int 15h at the start of the boot process, but SeaVGABios
relies on it to clear the screen.
It would be great if you could help me to implement a 32bit memcpy method
that doesn't rely on bios calls to copy memory.
All test in VESA mode had the clear screen feature disabled.

Patrick Rudolph (4):
  SeaVGABios/cbvga: Assume VGA compatible GPU in text-mode
  SeaVGABIOS/vbe: Query driver for scanline pitch
  SeaVGABios/cbvga: Use active mode to clear screen
  SeaVGABios/cbvga: Advertise compatible VESA modes

 vgasrc/bochsvga.c |   5 ++
 vgasrc/bochsvga.h |   1 +
 vgasrc/cbvga.c    | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 vgasrc/clext.c    |   5 ++
 vgasrc/stdvga.c   |   5 ++
 vgasrc/vbe.c      |   2 +-
 vgasrc/vgahw.h    |  10 ++++
 vgasrc/vgautil.h  |   3 ++
 8 files changed, 161 insertions(+), 6 deletions(-)

-- 
2.7.4