[alsa-devel] [RFC 0/4] ASoC: Add HDA HDMI codec driver

[Vinod Koul]

On Thu, Oct 22, 2015 at 10:22:32AM +0800, Hui Wang wrote:
> On 10/09/2015 08:28 PM, Vinod Koul wrote:
> >Yes, this patch series attempts to add yet another HDMI driver to
> >ASoC. This codec appears as HDA codec over HDA link. Although
> >the codec reside in display we have a HDA link from audio block
> >to this codec. The communication to codec is over HDA link
> >
> >Thanks to i915 component infrastructure, we do not need to worry
> >about keeping the codec on, this is done by i915 for us.
> >
> >Based on discussion with Mark here at ELCE and other attempts by
> >various folks on HDMI, I wanted to show on list the stuff we have
> >done and discuss and try to see how we converge various attempts
> >
> >The driver here only supports stereo and doesn't do multichannel
> >just yet, will add later once we converge here. The support for
> >using i915 component notification by David will be added later
> >on.
> >
> >Question/Comments welcome...
> Hello Vinod,
> 
> Is this driver supposed to be working for Bay Trail and Cherry Trail
> as well? Right now we have an OEM product based on the Cherry Trail
> platform, there is no analog audio codec on it, the only audio
> device on the product is the HDMI audio (just like this one http://mailman.alsa-project.org/pipermail/alsa-devel/2015-August/096979.html).
> So could you please share some information about the support status
> for Cherry Trail HDMI audio, e.g. is the driver developed by your
> team? Is it still an out-of-tree driver right now? And do you plan
> to upstream it under the hdac_hdmi.c framework?

Hello Hui,

No this driver is applicable to Skylake onwards. I believe canonical already
has a driver for HDMI BYT and you can use that and btw David knows about it

-- 
~Vinod