Re[2]: [PATCH 2.6.18] IA64: Add pci_fixup_video into IA64 kernel for embedded VG

From: eiichiro.oiwa.nm
Date: Wed Sep 27 2006 - 00:19:32 EST

>On Tuesday, September 26, 2006 12:42 am, eiichiro.oiwa.nm@xxxxxxxxxxx
>> To be compatible with Xorg's handling of PCI, we need pci_fixup_video on
>> IA64 platform like x86 platform. There are also machines, which have VGA
>> embedded into main board, among IA64 platform. Embedded VGA generally
>> don't have PCI ROM, and there are VGA ROM image in System BIOS.
>> Therefore, these machines need pci_fixup_video for the sysfs rom.
>> pci_fixup_video already exists in x86 Linux kernel. However since this
>> function doesn't exist in IA64 kernel, we could not run X server on IA64
>> box has embedded-VGA.
>> I tested pci_fixup_video on IA64 box has embedded-VGA. I confirmed we
>> can read VGA BIOS from the sysfs rom regardless of embedded-VGA.
>Looks good, Eiichiro, thanks for posting this.
>> +#include <linux/delay.h>
>> +#include <linux/dmi.h>
>> +#include <linux/pci.h>
>> +#include <linux/init.h>
>For this version, I don't think you need delay.h or dmi.h. And like Bjorn
>mentioned, this could probably be turned into generic code in drivers/pci
>so we don't have too much duplication with x86 (and like I mentioned,
>x86_64 could probably use this too).

"PCI-to-PCI Bridge Architecture Specification" describes how to support VGA.
And pci_fixup_video suits this specification because this function checks the
Bridge Control register. I also think pci_fixup_video should be turned into
generic quirks.c in drivers/pci.

Ok, I will modify code and test.


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