[alsa-devel] [PATCH] ASoC: tda998x: add a codec to the HDMI transmitter

[Jean-Francois Moine]

On Thu, 3 Jul 2014 11:44:32 +0100
Mark Brown <broonie at kernel.org> wrote:

> > > I'd expect this to return an error for the busy DAI rather than just
> > > silently ignore it failing to start or (better) implement some control
> > > to let the user select which of the DAIs is active.  
> 
> > This is not an error. If the audio subsystem (DPCM, not the user)
> > chooses to activate both I2S and S/PDIF, this means the HDMI audio may
> > be taken either from I2S or from S/PDIF: both inputs have the right
> > format and rate.  
> 
> Your board happens to only be able to present the same input on both I2S
> and S/PDIF but that might not apply to other boards, they may be able to
> route different signals to each which would present a practical problem.

If there are two different streamss on I2S and S/PDIF, and if the audio
subsystem wants to route these streams to the same connector (widget
'hdmi-out'), then, somewhere, there should be a software or a design
bug. No?

Anyway, the tda998x cannot know if the double route is wanted or not.

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