I tried not to include any VBIOS file in coreboot ROM much earlier, in my first tests. With 'Run VGA Option ROMs' option checked the board just hung.

And as I mentioned in my previous email VGA works fine with vendor's BIOS. So the card itself should be fine.

Sadly, I don't have another card to try. Even if I had, I still would need to make this one work somehow as Mohon Peak is just a reference board and the target board will have a similar VGA controller.

So please, let me know if there are some other things I could try or if I am mistaken somewhere.

-Viktor

On 03/19/2015 09:20 PM, Marc Jones wrote:

Hi Viktor,

On Thu, Mar 19, 2015 at 4:23 AM Kuzmichev Viktor <kuzmichevviktorv@gmail.com> wrote:
Hello,

I'm using coreboot + SeaBIOS on Mohon Peak CRB. And I've tried to make
VGA work for a while now. I used this article as a guide:
http://www.coreboot.org/VGA_support


Since it is an add-in card, you don't need to extract the VBIOS and put it into cbfs. The VBIOS on the card will run during the PCI card enumeration. It seems that there is a problem with that specific aspeed card and/or VBIOS. You may want to try a different card to avoid the issue. Please let us know the results if you debug that card further.

Regards,
Marc

 
Extracting VGA BIOS from vendor BIOS image did not work:
$ ./bios_extract EDVLCRB1.86B.0043.R00.1408290947_MPK.bin
Using file "EDVLCRB1.86B.0043.R00.1408290947_MPK.bin" (8192kB)
Error: Unable to detect BIOS Image type.

Then, I've downloaded VGA BIOS from here:
http://www.aspeedtech.com/support.php
Mohon Peak uses Aspeed VGA controller AST1300.

And also, I've extracted Video ROM from /dev/mem:
# dd if=/dev/mem of=vgabios.bin bs=1k count=32 skip=768

Neither of them worked. Here's what I've tried. I've tried to add them
via coreboot's menuconfig (' Add VGA BIOS image' option). I've tried to
add them manually via cbfstool as an optionrom and as a raw file. I've
tried to put them in CBFS under vgaroms/ directory. Here's my latest
ROM-file layout:
$ ./build/cbfstool build/coreboot.rom print
coreboot.rom: 8192 kB, bootblocksize 1024, romsize 8388608, offset 0x600000
alignment: 64 bytes, architecture: x86

Name                           Offset     Type         Size
cmos_layout.bin                0x600000   cmos_layout  1352
pci1a03,2000.rom               0x600580   optionrom    32768
fallback/romstage              0x6085c0   stage        26616
fallback/ramstage              0x60ee00   stage        59904
fallback/payload               0x61d840   payload      56100
config                         0x62b3c0   raw          4532
revision                       0x62c5c0   raw          708
pci8086,1f41.rom               0x62c8c0   raw          61952
vgaroms/pci1a03,2000.rom       0x63bb00   raw          32768
img/Memtest86+(5.01)           0x643b40   payload      159492
(empty)                        0x66aa80   null         939288
mrc.cache                      0x74ffc0   (unknown)    65536
cpu_microcode_blob.bin         0x760000   microcode    83968
(empty)                        0x774840   null         46936
fsp.bin                        0x77ffc0   (unknown)    372736
(empty)                        0x7db000   null         150424

The entries pci1a03,2000.rom are the VGA ROMs there. I also tried to
remove either of them. I've tested with coreboot option 'Run VGA Option
ROMs' checked and unchecked without any difference. In SeaBIOS I set
'VGA Hardware Type (coreboot linear framebuffer)' as the other options
are None, GeodeGX2 and GeodeLX, so coreboot linear framebuffer seemed
more logical.

I saw this mailing list:
http://www.seabios.org/pipermail/seabios/2015-January/008588.html
but found no solution there and it seems not to be my case as my board
does not hang.

I put coreboot and SeaBIOS output in the attachment. Debug levels set to
7 for both. In coreboot only 'Output verbose CBFS debug messages'
checked in 'Debugging' submenu.

Is there anything I'm doing wrong or simply missing?

Viktor
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