MCLK on ROCK S0

Hi, folks!
My system: ROCK S0, latest Armbian kernel 6.6 + manually added driver for dummy-codec.
My problem: I do’t see MCLK on 35 pin of connector (GPIO2_A4 or I2S0_8CH_MCLK).

I tried to do as in this post, the BCLK, LRCK and DATA signals are output, but the MCLK is missing! I need MCLK for my project!

   tdm_sound {
            compatible = "simple-audio-card";
            simple-audio-card,name = "rockpis-tdm";
            simple-audio-card,format = "dsp_b";
            simple-audio-card,mclk-fs = < 128 >;
            simple-audio-card,bitclock-master = <&tdm_snd_cpu>;
            simple-audio-card,frame-master = <&tdm_snd_cpu>;
            status = "okay";

            tdm_snd_cpu: simple-audio-card,cpu {
                dai-tdm-slot-num = <8>;
                dai-tdm-slot-width = <16>;
                sound-dai = <&i2s_tdm>;
            };

            tdm_snd_codec: simple-audio-card,codec {
                sound-dai = <&dummy_tdm_codec>;
            };
    };

    dummy_tdm_codec: dummy-codec {
            status = "okay";
            compatible = "rockchip,dummy-codec";
            #sound-dai-cells = < 0x00 >;
            phandle = < 0x139 >;
    };

Can anyone help with this?

Hm… This is from Rockchip RK3308 Technical Reference Manual Part1


If I right, I need to change bit 2 in GRF_SOC_CON12! But how?