On Friday, 22 December 2023 12:05:44 CET Manuel Traut wrote:
> +       rk817-sound {
> +               compatible = "simple-audio-card";
> +               pinctrl-names = "default";
> +               pinctrl-0 = <&hp_det_l>;
> +               simple-audio-card,format = "i2s";
> +               simple-audio-card,name = "PineTab2";
> +               simple-audio-card,mclk-fs = <256>;
> +
> +               simple-audio-card,widgets =
> +                       "Microphone", "Mic Jack",
> +                       "Headphone", "Headphones",
> +                       "Microphone", "Microphone",
> +                       "Speaker", "Speakers";
> +
> +               simple-audio-card,routing =
> +                       "MICL", "Microphone",
> +                       "MICR", "Mic Jack",
> +                       "Headphones", "HPOL",
> +                       "Headphones", "HPOR",
> +                       "Speaker Amplifier INL", "HPOL",
> +                       "Speaker Amplifier INR", "HPOR",
> +                       "Speakers", "Speaker Amplifier OUTL",
> +                       "Speakers", "Speaker Amplifier OUTR";
> +
> +               simple-audio-card,hp-det-gpio = <&gpio4 RK_PC6
> GPIO_ACTIVE_HIGH>; +               simple-audio-card,aux-devs =
> <&speaker_amp>;
> +               simple-audio-card,pin-switches = "Speakers", "Microphone";
> +
> +               simple-audio-card,cpu {
> +                       sound-dai = <&i2s1_8ch>;
> +               };
> +
> +               simple-audio-card,codec {
> +                       sound-dai = <&rk817>;
> +               };
> +       };

Not sure if it's right (or allowed) to post a different patch as attachment, 
but I have been using a different audio configuration (see attachment).
I haven't yet tried if/how it works via HDMI yet, but the speakers and 
headphones work fine.
This patch is based on the following commit:
https://github.com/TuxThePenguin0/linux/commit/
872b829a3511cfa853bd3af3bd4f30be1cb3d1ab

I've added 'Danct12' to the To list as they are the maintainer of the primary 
PT2 image and we worked together to get to this audio config.
I don't if they still use it.
(I've been using my own kernel/image for a while now).

Cheers,
  Diederik