[coreboot] AMD RS690 TMDS

Daniel Toussaint daniel at dmhome.net
Tue Aug 11 18:32:37 CEST 2009


I am using the open source drivers , radeon and radeonhd. When I try it on a
similar board with AMI bios , xrandr can switch on the HDMI port without any
problems - with radeon and radeonhd. I guess I could give Catalyst a try to
see if it makes any difference(maybe it does magic with the vga bios) I
think however, that the problem lies in the fact that some config needs to
be done in PCIE-GFX , so that one of the ports gets configured as TMDS.
Right now, I am trying to get that to work - so far no results yet ....
Another interesting fact is that I am working with this board that does not
have another BIOS except for coreboot .... so I have nothing to compare
register values with.


On Wed, Aug 12, 2009 at 12:08 AM, Dan Lykowski <engineerguy3737 at yahoo.com>wrote:

> Daniel,
>  I'm sorry I don't know the answer to your issue.. But I have a question?
> Are you using the open source driver or Catalyst? Have you tried Catalyst
> and does it run?
> Thanks
> Dan Lykowski
> ------------------------------
> *From:* Daniel Toussaint <daniel at dmhome.net>
> *To:* coreboot at coreboot.org
> *Sent:* Mond,ay, August 10, 2009 7:57:21 PM
> *Subject:* [coreboot] AMD RS690 TMDS
> Dear All,
> I am working on supporting yet another AMD 690E based board. We have
> everything working fine, except for the HDMI output. I can't seem to switch
> to an HDMI or DVI monitor with Xrandr.
> The RS690 Register programming requirements , page 65 (PCIE
> inititialization for TMDS) starts explaining the steps to get TMDS working -
> as far as I can see they are not implemented yet in southbridge/amd/rs690 ?
> Implemening those steps would bring up HDMI or are there other things that
> need to be taken care of ? The VBIOS binary is given to me by AMD and has
> HDMI support, so they say.
> The ASIC revisision of the chip is A12. Any comments / idea's are more than
> welcome.
> Greetings,
> Daniel Toussaint
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