cvs commit: src/sys/conf files.i386 src/sys/pci agp_ati.c agpreg.h src/sys/modules/agp Makefile

Nate Lawson nate at
Sat Sep 17 13:44:27 PDT 2005

Eric Anholt wrote:
> On Sat, 2005-09-17 at 12:04 -0700, Nate Lawson wrote:
>>Mike Silbersack wrote:
>>>I think I asked in irc a while ago, but I can't recall the answer.
>>>I don't seem to have agp support on my laptop, which has:
>>>(--) PCI:*(0:2:0) Intel Corporation 82852/855GM Integrated Graphics 
>>>Device rev 2, Mem @ 0xe8000000/27,
>>>0xe0000000/19, I/O @ 0x1800/3
>>>(--) PCI: (0:2:1) Intel Corporation 82852/855GM Integrated Graphics 
>>>Device rev 2, Mem @ 0xf0000000/27,
>>>According to Xorg.  Was there something odd about the chipset, or is it 
>>>just a matter of adding device IDs?  This is with RELENG_6.
>>855GM and GMS are supported by the latest beta Xorg.  So you just need 
>>to update your Xorg-server port.
> We clarified in private mail that the agp device isn't attaching.  I
> think acpi_video is beating it out, confirming that we really need to be
> able to somehow share devices well for video.  That's 3 drivers now
> (agp, drm, and acpi_video) that would all like to play.

Ah.  Yes, I think we'll have to do something like what I did for cpu 
devices.  Basically, cpu0, cpu1, etc. implement a pseudo bus and 
multiple drivers attach below it.  Do a devinfo to see this.  There is 
no real way in newbus to have multiple drivers attached to a device if 
it doesn't implement a bus interface.

This will require some design thinking.


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