[alsa-devel] [PATCH v3 0/5] ALSA: hda - hdmi: ATI/AMD multi-channel and HBR support

Anssi Hannula anssi.hannula at iki.fi
Mon Nov 25 20:35:56 CET 2013

25.11.2013 17:07, Raymond Yau kirjoitti:
>> I have a Radeon 4670 (Sapphire
>> branded) connected to a Yamaha RX-V773. I am running the sound/for-next
>> kernel (82755ab) with your "missing PCM SAD" patch applied.
>> The new kernel has allowed ALSA to recognise the card as multichannel and
> I
>> can issue the following speaker-test command but I still only hear "Front
>> Left" and "Front Right" and the Yahama seems to report the signal as
> stereo.
>> # speaker-test -Dhdmi:CARD=HDMI,DEV=0 -c6 -t wav
> Why do you use -c6 when your HDMI codec only support stereo
> Node 0x02 [Audio Output] wcaps 0x201: Stereo Digital
>    Converter: stream=1, channel=0
> Node 0x03 [Pin Complex] wcaps 0x400381: Stereo Digital

All ATI/AMD HDMI codecs report stereo only here, their multichannel
support is non-standard (probably predates the HDA spec).

Anssi Hannula

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