HDMI audio on R500

[Russ Dill]

On Mon, Mar 23, 2009 at 3:29 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On 3/23/09, Russ Dill <russ.dill at gmail.com> wrote:
>> I have a laptop with an HDMI output. In Vista, I can get the Realtek
>>  HD audio driver to pass audio through the HDMI interface. In Linux, no
>>  amount of fiddling with IEC958 switiches and PCM devices will get
>>  audio to come through the HDMI interface.
>>
>>  00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)
>>  [...]
>>  00:14.2 Audio device: ATI Technologies Inc IXP SB4x0 High Definition
>>  Audio Controller (rev 01)
>>  [...]
>>  01:00.0 VGA compatible controller: ATI Technologies Inc M56P [Radeon
>>  Mobility X1600]
>>
>>  An alsa developer was thinking that since the video chip interfaces
>>  with the TMDS encoder chip and must somehow be involved. Is anyone
>>  aware of any registers or bits that would enable HDMI audio
>>  pass-through?
>
> Native HDMI audio support is only available on RS6xx/R6xx/R7xx chips.
> I suspect there is either some platform specific magic required in to
> get it to work (i.e., some external component does the audio/video
> mixing), or your laptop's oem used an external hdmi encoder.  Can you
> send me your video bios?
>
> as root:
> cd /sys/bus/pci/devices/<pci bus id>
> echo 1 > rom
> cat rom > /tmp/vbios.rom
> echo 0 > rom

Attached
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vbios.rom
Type: application/octet-stream
Size: 65536 bytes
Desc: not available
Url : http://lists.x.org/archives/xorg-driver-ati/attachments/20090323/e8ce52c2/attachment-0001.obj