Re: [PATCH v1 2/5] arm64: dts: qcom: shikra-iqs: Add LT9611UXD HDMI audio overlay

[Karthik S]

On 10/22/2026 4:01 PM, Dmitry Baryshkov wrote:
> >   arch/arm64/boot/dts/qcom/Makefile             |  4 +++
> >   arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts   |  2 +-
> >   .../dts/qcom/shikra-iqs-lt9611uxd-evk.dtso    | 36 +++++++++++++++++++
> >   3 files changed, 41 insertions(+), 1 deletion(-)
> >   create mode 100644 arch/arm64/boot/dts/qcom/shikra-iqs-lt9611uxd-evk.dtso
> >
> > diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> > index 1c86e7e98f55..127c5c345eff 100644
> > --- a/arch/arm64/boot/dts/qcom/Makefile
> > +++ b/arch/arm64/boot/dts/qcom/Makefile
> > @@ -339,6 +339,10 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdx75-idp.dtb
> >   dtb-$(CONFIG_ARCH_QCOM)	+= shikra-cqm-evk.dtb
> >   dtb-$(CONFIG_ARCH_QCOM)	+= shikra-cqs-evk.dtb
> >   dtb-$(CONFIG_ARCH_QCOM)	+= shikra-iqs-evk.dtb
> > +
> > +shikra-iqs-lt9611uxd-evk-dtbs		:= shikra-iqs-evk.dtb shikra-iqs-lt9611uxd-evk.dtbo
> > +
> What does this overlay mean from the hardware point of view? Is it some
> hardware variant that requires reconfiguration by soldering? By changing
> the jumper? Can one use max98091 and HDMI audio in parallel?
From hardware point of view, there a physical dip switch which in "ON" 
state indicates max98091 codec is available and in "OFF" state indicated 
the lt9611uxd bridge chip is available.

Parallel use of HDMI audio and max98091 is not supported.


> > +
> > +/* Board subtype 0: LT9611UXD as I2S audio codec, no MAX98091 */
> > +
> > +&lt9611uxd {
> > +	#sound-dai-cells = <1>;
> > +};
> This should be a part of the base DT.

sure thanks, will update in V2.
> > +
> > +&sound {
> > +	compatible = "qcom,shikra-iqs-lt9611uxd-sndcard";
> > +	model = "shikra-iqs-lt9611uxd-evk";
> > +	audio-routing = "VA DMIC0", "vdd-micb",
> > +			"VA DMIC1", "vdd-micb",
> > +			"VA DMIC2", "vdd-micb",
> > +			"VA DMIC3", "vdd-micb";
> > +
> > +	pri-i2s-playback-dai-link {
> > +		codec {
> > +			sound-dai = <&lt9611uxd 0>;
> > +		};
> > +	};
> > +
> > +	pri-i2s-capture-dai-link {
> > +		status = "disabled";
> > +	};
> > +};
> > +
> > +&max98091 {
> > +	status = "disabled";
> > +};
> Keep the nodes sorted.

sure thanks, will update in V2.


Thanks and regards,
Karthik S