First time I am doing anything like this. This series adds mising pieces here and there to allow addition of sensible sound card in qrb4210-rb2.dts and enable HDMI audio playback there.
It is planned in future to add support for other outputs and capture -- analog audio support.
The series depends on Srini's sm4250 lpi pinctrl driver: c2e5a25e8d88 (pinctrl: qcom: Introduce SM4250 LPI pinctrl driver, 2024-06-22) 2ffa7a354662 (dt-bindings: pinctrl: qcom: Add SM4250 pinctrl, 2024-06-22) As far as I understood it was already accepted and will go through pinctrl tree.
Alexey Klimov (7): ASoC: dt-bindings: qcom,sm8250: add qrb4210-rb2-sndcard ASoC: qcom: sm8250: add qrb4210-rb2-sndcard compatible string ASoC: qcom: sm8250: add handling of secondary MI2S clock arm64: dts: qcom: sm6115: add apr, its services and simple sound node arm64: dts: qcom: sm6115: add LPASS LPI pin controller arm64: dts: qcom: sm6115: add description of lpi_i2s2 pins arm64: dts: qcom: qrb4210-rb2: add HDMI audio playback support
.../bindings/sound/qcom,sm8250.yaml | 1 + arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 73 ++++++++++++ arch/arm64/boot/dts/qcom/sm6115.dtsi | 112 ++++++++++++++++++ sound/soc/qcom/sm8250.c | 19 +++ 4 files changed, 205 insertions(+)