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Title: I2S MCLK on Core-3399-JD4 [Print This Page]
Author: alex.mamonov    Time: 9/5/2019 17:38
Title: I2S MCLK on Core-3399-JD4
Last edited by alex.mamonov In 9/5/2019 18:13 Editor

Hi!

I'm trying to use I2S1 on Firefly Core-3399-JD4 with TLV320AIC3100 codec. This is how I describe it in the dts:
  1. / {
  2.   tlv320aic31xx-sound {
  3.     compatible = "simple-audio-card";
  4.     status = "okay";
  5.     simple-audio-card,format = "i2s";
  6.     simple-audio-card,name = "rockchip,tlv320aic31xx-codec";
  7.     simple-audio-card,widgets =
  8.                             "Microphone", "Mic Jack",
  9.     "Headphone", "Headphone Jack";
  10.     simple-audio-card,routing =
  11.     "Mic Jack", "MICBIAS1",
  12.     "IN1P", "Mic Jack",
  13.     "Headphone Jack", "HPOL",
  14.     "Headphone Jack", "HPOR";
  15.   
  16.     simple-audio-card,cpu {
  17.       sound-dai = <&i2s1>;
  18.       format = "i2s";
  19.     };
  20.     simple-audio-card,codec {
  21.       sound-dai = <&tlv320aic3100>;
  22.       format = "i2s";
  23.     };
  24.   };
  25. };
  26. &i2c1 {
  27.   tlv320aic3100: tlv320aic3100@18 {
  28.     #sound-dai-cells = <0>;
  29.     compatible = "ti,tlv320aic3100";
  30.     reg = <0x18>;
  31.     status = "okay";

  33.     HPVDD-supply = <&vcc3v3_sys>;
  34.     SPRVDD-supply = <&vcc5v0_host>;
  35.     SPLVDD-supply = <&vcc5v0_host>;
  36.     AVDD-supply = <&vcc3v3_sys>;
  37.     IOVDD-supply = <&vcca1v8_codec>;
  38.     DVDD-supply = <&vcca1v8_codec>;
  39.   };
  40. };
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The drivers starts without errors and I can see audio device in aplay -l output, but there is no sound and I can't see the clocks on MCLK pin. How can I get MCLK on?


Author: penguin    Time: 9/18/2019 10:56
You need to specify `clock`, take rt5640 as an example:

  1. &i2c1 {
  2.         status = "okay";
  3.         i2c-scl-rising-time-ns = <300>;
  4.         i2c-scl-falling-time-ns = <15>;

  6.         rt5640: rt5640@1c {
  7.                 #sound-dai-cells = <0>;
  8.                 compatible = "realtek,rt5640";
  9.                 reg = <0x1c>;
  10.                 clocks = <&cru SCLK_I2S_8CH_OUT>;
  11.                 clock-names = "mclk";
  12.                 realtek,in1-differential;
  13.                 pinctrl-names = "default";
  14.                 pinctrl-0 = <&rt5640_hpcon &i2s_8ch_mclk>;
  15.                 hp-con-gpio = <&gpio4 21 GPIO_ACTIVE_HIGH>;
  16.                 //hp-det-gpio = <&gpio4 28 GPIO_ACTIVE_LOW>;
  17.                 io-channels = <&saradc 4>;
  18.                 hp-det-adc-value = <500>;
  19.         };
  20. }
Copy the code
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