[alsa-devel] [PATCH v3 6/6] ASoC: zx: add zx296702 hdmi codec

[Mark Brown]

On Wed, Jun 03, 2015 at 09:47:46AM +0800, Jun Nie wrote:
> 2015-06-03 2:13 GMT+08:00 Mark Brown <broonie at kernel.org>:
> > On Mon, Jun 01, 2015 at 09:42:34AM +0800, Jun Nie wrote:

> >> So I need implement dai link in machine audio card driver, while not
> >> use simple card and device tree initialization. In this way, I surely
> >> can embed HDMI audio codec in HDMI driver. Is that right?

> > I'm sorry, I don't entirely follow what you're saying here.

> I am guessing you suggest me to implement a ASoC board driver, like
> sound/soc/omap/omap3pandora.c. I can link HDMI codec with DAI with
> snd_soc_dai_link structure to avoid specify the connection in dts.

You can do that if you like, but it's also fine to show the link between
the S/PDIF and HDMI IPs in DT if you like.

> >> I had try to initialize audio all from dts, so need a HDMI codec dt
> >> node to connect with DAI. However, I cannot find a way to create an
> >> independent HDMI CODEC dt node because it is brought up from HDMI
> >> driver. If my above understanding is correct, a machine level DAI link
> >> shall resolve this issue with dropping simple card and DAI link in
> >> dts. Thanks for your comments!

> > If the HDMI encoder is simple I'd expect it to be possible to use it
> > with simple-card.  If it isn't then we can look at why.

> Most of devices is initialized from devicetree if not all on my board.
> So I need fill CODEC/DAI dt node for imple-card in dts. I experience
> the difficulty that I cannot create HDMI CODEC dt node. Because HDMI
> CODEC shall be part of HDMI driver and be brought up with direct call
> to snd_soc_register_codec in HDMI driver probe function per my
> understanding. Then I do not have an independent dt node for HDMI
> CODEC, thus cannot link the CODEC to DAI with dts information. Do you
> see any chance to connect a DAI to an embedded CODEC of HDMI video
> device? Thank you!

Are you saying that the HDMI IP doesn't appear in DT at all?  If the
HDMI IP appears in DT it should be possible to reference it.
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