Radeon HDMI audio in 2.6.33 kernel ???

Radeon HDMI audio in 2.6.33 kernel ???

[debian]

Hello,

I'm not sure I'm at the right place (please, if not, tell me where I can
find a solution...) but I have a problem with multimedia hardware.
So, I've changed my graphic card and I've bought an ATI Radeon HD 4550. My
goal is to use only an HDMI cable between my computer and my AV amplifier.
I've installed Debian Sid but I can't have any sound... Everything seems
OK with Alsa (and PulseAudio), but no sound !!!

With google, I've found this :
http://www.phoronix.com/scan.php?page=news_item&px=NzgxMA
[I should need a 2.6.33 kernel to have HDMI support with ATI cards]
So, I've compiled the 2.6.33RC5 kernel, but no difference !!!

The card seems to be OK :
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Do you have any idea ?

Thank you.

David.

Re: Radeon HDMI audio in 2.6.33 kernel ???

[Takashi Iwai]

At Wed, 27 Jan 2010 11:17:04 +0100,
<debian@bercot.org> wrote:
> 
> 
> Hello,
> 
> I'm not sure I'm at the right place (please, if not, tell me where I can
> find a solution...) but I have a problem with multimedia hardware.
> So, I've changed my graphic card and I've bought an ATI Radeon HD 4550. My
> goal is to use only an HDMI cable between my computer and my AV amplifier.
> I've installed Debian Sid but I can't have any sound... Everything seems
> OK with Alsa (and PulseAudio), but no sound !!!

How did you test it?

> With google, I've found this :
> http://www.phoronix.com/scan.php?page=news_item&px=NzgxMA
> [I should need a 2.6.33 kernel to have HDMI support with ATI cards]
> So, I've compiled the 2.6.33RC5 kernel, but no difference !!!
> 
> The card seems to be OK :
> # aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> 
> Do you have any idea ?

If the audio codec is detected, a possible problem is the video driver
side.  The HDMI is handled rather in the video chip, and it has
usually a register switch to enable/disable HDMI audio.  Similarly,
the EDID handling can break the audio handling, too.

If it's really a problem of the audio codec, you can try to move the
corresponding codec id from patch_atihdmi.c to patch_intelhdmi.c.
(don't forget MODULE_ALIAS() there, too).


Takashi