Re: [PATCH] VGA arbitration: draft of kernel side

From: Jon Smirl
Date: Wed Mar 09 2005 - 00:59:32 EST

On Wed, 09 Mar 2005 16:37:13 +1100, Benjamin Herrenschmidt
<benh@xxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, 2005-03-08 at 23:35 -0500, Jon Smirl wrote:
> > This is from /linux-2.5/Documentation/filesystems/sysfs-pci.txt. It
> > describes how ia64 is achieving legacy IO. The VGA control code
> > probably needs to be coordinated with this.
> This is a different thing, and I will implement it on ppc one of these
> days. This is for issuing the IO cycles on the bus. It has nothing
> to do with the actual arbitration work.

Each one of these legacy spaces corresponds to an allowable
simultaneous VGA use. There should be one arbiter per legacy space.

Jon Smirl
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