Re: audio utility could not detect hdmi device but codec device

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On Sun, Feb 27, 2011 at 4:17 PM, hong zhang <henryzhang62@xxxxxxxxx> wrote:
> List,
>
> My TI SoC reference board lacks functionality of audio over HDMI but does have video over HDMI.
>
> ALSA utility "aplay -l" does not display HDMI but does display codec device.
>
> I am wondering if hdmi audio is not registered. If yes, how to register it to make hdmi audio device displayed by "aplay -l"
>
> Any help will be appreciated!
>

To support audio over hdmi, you need to read back the hdmi edid
extensions from the monitor to determine what it's audio capabilities
are and then you need to generate the hdmi infoframe packets and mix
the sound data into the hdmi data stream.  You need hdmi hardware that
is capable of generating the packets and mixing the audio stream.

Alex

> --henry
>
>
>
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