Re: [coreboot] vga not working

[Myles Watson]

On Mon, Aug 17, 2009 at 10:57 AM, ron minnich  wrote:
> On Mon, Aug 17, 2009 at 9:12 AM, Myles Watson wrote:
> > For me the steps would be:
> > Make sure that the device that needs the config writes is in the above
> >
> > list.
>
> I am after painful detail :-)

I'm much better at answering questions than brain-dumping, but I'm trying.
> > Add code like this:
> >   if (dev->link[link].bridge_ctrl & PCI_BRIDGE_CTL_VGA) {
> >        /* Add your code from auto.c here */
> >   }
> >
> > to the .init function of the bridge.
>
> Yes. And how did bridge_ctrl get set again?

In set_vga_bridge_bits(), the code finds the VGA device and then walks back
to the root, setting the bridge_ctrl bits along the way.  When the
enable_resources() or init() function gets called, device-specific code can
then do what it needs to with that information to make it work.

Myles