Re: [PATCH 2/3] arm64: dts: qcom: nord-rrd: Add sound support

[Shawn Guo]

On Mon, Sep 14, 2026 at 11:01:36AM +0200, Konrad Dybcio wrote:
> On 9/14/26 4:40 AM, Shawn Guo wrote:
> > From: Mohammad Rafi Shaik <mohammad.rafi.shaik@xxxxxxxxxxxxxxxx>
> > 
> > Enable audio on the nord RRD board. Add a soundcard node using the
> > qcom,nord-ride-sndcard compatible with two DAI links:
> > 
> >   - PCM1681 playback over Tertiary MI2S RX
> >   - ADAU1979 capture over Tertiary MI2S TX
> > 
> > Add MI2S pin mux states (data, SCLK, WS on GPIO 73-76) and the MCLK0
> > pin state (GPIO 99) to nord-embedded.dtsi so they can be shared with
> > other nord board variants.
> > 
> > Add PCM1681/ADAU1979 codec nodes on I2C18, with the PCM1681 system
> > clock supplied via MCLK0. The DAC control lines come off a TCA6408 I/O
> > expander on the same bus, so add that too and hog its dac_enable and
> > click-pop-mute-n outputs, both of which have to be asserted before the
> > DAC produces sound.
> 
> Sounds like something a driver should ensure?

You are absolutely right! We will try to control them from pcm1681 and
simple-audio-amplifier driver.

Shawn