Audio Support Rock Pi S

ROCK Pi Series Using ROCK Pi S
50

Hi @ash. I have checked out your code.
I haven’t tried the armbian image, but if the DAC supports I2S protocol, it should work fine with the configuration I posted. What should change is the clock connection: in my case, I use RX clock. I assume you should only change it. In my case, it does not matter which microphone I am using, as long as both board and the transducer use the same interface.
Currently I am only dealing with multichannel audio recording :slightly_smiling_face:.

Ah, maybe I understood this wrong, is the only way to access i2s via the acodec-sound node?
i.e I can’t define a different codec that directly uses the i2s@ff3x0000 interfaces?

I don’t have a scope right now to confirm if there are any outputs with my overlay, but I don’t see any mapping messages in the boot log such as with acodec-sound:

[1.242] rk3308-acodec ff560000.acodec: rk3308_codec_set_jack_detect: Request detect hp jack once
[1.244] rk-multicodecs acodec-sound: rk3308-hifi <-> ff320000.i2s mapping ok

Eitherway, I don’t think its a DAC/Codec issue, as the PCM5102a is as good as the dummy-codec, and should show up even when not connected.

But I am still a bit confused with the multichannel I2S outputs and mapping.
Looking at the i2s@ff300000 node in rk3308.dtsi

  • Where are the enabled output/input pins defined? Is it pinctrl-0?
    – Are all 8 i2s_8ch_0_sdi and i2s_8ch_0_sdo pins active?

i2s_8ch_0: i2s@ff300000 {
	compatible = "rockchip,rk3308-i2s-tdm";
	reg = <0x0 0xff300000 0x0 0x1000>;
	interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
	clocks = <&cru SCLK_I2S0_8CH_TX>, <&cru SCLK_I2S0_8CH_RX>, <&cru HCLK_I2S0_8CH>,
		 <&cru SCLK_I2S0_8CH_TX_SRC>,
		 <&cru SCLK_I2S0_8CH_RX_SRC>,
		 <&cru PLL_VPLL0>,
		 <&cru PLL_VPLL1>;
	clock-names = "mclk_tx", "mclk_rx", "hclk",
		      "mclk_tx_src", "mclk_rx_src",
		      "mclk_root0", "mclk_root1";
	dmas = <&dmac1 0>, <&dmac1 1>;
	dma-names = "tx", "rx";
	resets = <&cru SRST_I2S0_8CH_TX_M>, <&cru SRST_I2S0_8CH_RX_M>;
	reset-names = "tx-m", "rx-m";
	rockchip,cru = <&cru>;
	rockchip,grf = <&grf>;
	rockchip,mclk-calibrate;
	pinctrl-names = "default";
	pinctrl-0 = <&i2s_8ch_0_sclktx
		     &i2s_8ch_0_sclkrx
		     &i2s_8ch_0_lrcktx
		     &i2s_8ch_0_lrckrx
		     &i2s_8ch_0_sdi0
		     &i2s_8ch_0_sdi1
		     &i2s_8ch_0_sdi2
		     &i2s_8ch_0_sdi3
		     &i2s_8ch_0_sdo0
		     &i2s_8ch_0_sdo1
		     &i2s_8ch_0_sdo2
		     &i2s_8ch_0_sdo3
		     &i2s_8ch_0_mclk>;
	status = "disabled";
};