linux-kernel - Re: [PATCH 1/2] arm64: dts: imx8mp-evk: Add HDMI audio sound card support

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Date: Sun, 12 May 2024 15:26:09 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Shengjiu Wang <shengjiu.wang@...il.com>
Cc: Alexander Stein <alexander.stein@...tq-group.com>, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
	festevam@...il.com, linux-imx@....com, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Shengjiu Wang <shengjiu.wang@....com>
Subject: Re: [PATCH 1/2] arm64: dts: imx8mp-evk: Add HDMI audio sound card
 support

Hello Wang,

On Mon, Feb 26, 2024 at 11:06:48AM +0800, Shengjiu Wang wrote:
> On Fri, Feb 23, 2024 at 5:06 PM Alexander Stein
> <alexander.stein@...tq-group.com> wrote:
> > Am Freitag, 23. Februar 2024, 09:02:18 CET schrieb Shengjiu Wang:
> > > The AUD2HTX is a digital module that provides a bridge between
> > > the Audio Subsystem and the HDMI RTX Subsystem. This
> > > module includes intermediate storage to queue SDMA transactions
> > > prior to being synchronized and passed to the HDMI
> > > RTX Subsystem over the Audio Link.
> > >
> > > AUD2HTX works as the cpu dai in HDMI audio sound card.
> > >
> > > Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

..

> > Don't you need to configure the PAI as well? See [1]
> > for downstream implementation. I'm wondering because I had to hack something
> > similar. Without I got no HDMI audio.
> 
> Yes, the PAI part is needed.
> But this commit is just for sound card dts update.

I did try this series (the v3, to be correct) and to me is not working.
While I understand this is just the DTS update, did you got any chance
to send patches for the remaining bits required to have the
functionality working? Am I missing something?

Thanks,
Francesco