RK3308 2通道模拟MIC无法录音

firefly_zhongw

1. pdm_i2s_dais: 这个是适配麦克风阵列板的或者数字mic的
2. 使用耳机mic，可以参考如下

1. diff --git a/kernel/arch/arm64/boot/dts/rockchip/rk3308-roc-cc-dmic-pdm_emmc.dts b/kernel/arch/arm64/boot/dts/rockchip/rk3308-roc-cc-dmic-pdm_emmc.dts
   
2. index b996358..735ddb2 100644
   
3. --- a/kernel/arch/arm64/boot/dts/rockchip/rk3308-roc-cc-dmic-pdm_emmc.dts
   
4. +++ b/kernel/arch/arm64/boot/dts/rockchip/rk3308-roc-cc-dmic-pdm_emmc.dts
   
5. @@ -13,7 +13,7 @@
   
6.         compatible = "firefly,rk3308-roc-cc-dmic-pdm_emmc", "firefly,rk3308";
   
7. 
   
8.         pdm_i2s_dais: pdm-i2s-dais {
   
9. -               status = "okay";
   
10. +               status = "disabled";
    
11.                 compatible = "rockchip,rk3308-multi-dais", "rockchip,multi-dais";
    
12.                 dais = <&pdm_8ch>, <&i2s_8ch_2>;
    
13.                 capture,channel-mapping = <6 2>;
    
14. @@ -34,13 +34,23 @@
    
15.         };
    
16. 
    
17.         vad-sound {
    
18. -               status = "okay";
    
19. +               status = "disabled";
    
20.                 compatible = "rockchip,multicodecs-card";
    
21.                 rockchip,card-name = "rockchip,rk3308-vad";
    
22.                 rockchip,cpu = <&pdm_i2s_dais>;
    
23.                 rockchip,codec = <&acodec>, <&vad>;
    
24.         };
    
25. 
    
26. +       vad_acodec_sound: vad-acodec-sound {
    
27. +                status = "okay";
    
28. +                compatible = "rockchip,multicodecs-card";
    
29. +                rockchip,card-name = "rockchip,rk3308-acodec";
    
30. +                rockchip,codec-hp-det;
    
31. +                rockchip,mclk-fs = <256>;
    
32. +                rockchip,cpu = <&i2s_8ch_2>;
    
33. +                rockchip,codec = <&acodec>, <&vad>;
    
34. +        };
    
35. +
    
36.      leds {
    
37.          status = "okay";
    
38.          compatible = "gpio-leds";
    
39. @@ -63,6 +73,14 @@
    
40.         status = "disabled";
    
41. };
    
42. 
    
43. +&acodec {
    
44. +    rockchip,micbias1;
    
45. +    rockchip,micbias2;
    
46. +    rockchip,en-always-grps = <0 1 2 3>;
    
47. +    rockchip,adc-grps-route = <0 1 2 3>;
    
48. +    /delete-property/rockchip,loopback-grp;
    
49. +};
    
50. +
    
51. &bluetooth_sound {
    
52.      status = "okay";
    
53. };
    
54. @@ -74,7 +92,7 @@
    
55. };
    
56. 
    
57. &pdm_8ch {
    
58. -       status = "okay";
    
59. +       status = "disabled";
    
60.         #sound-dai-cells = <0>;
    
61.         rockchip,no-dmaengine;
    
62.         pinctrl-names = "default";
    
63. @@ -88,7 +106,7 @@
    
64. 
    
65. &vad {
    
66.         status = "okay";
    
67. -       rockchip,audio-src = <&pdm_8ch>;
    
68. +       rockchip,audio-src = <&i2s_8ch_2>;
    
69.         rockchip,det-channel = <0>;
    
70.         rockchip,mode = <1>;
    
71.         rockchip,buffer-time-ms = <200>;
    
72. @@ -102,7 +120,7 @@
    
73. };
    
74. 
    
75. &pdm_i2s_dais {
    
76. -       status = "okay";
    
77. +       status = "disabled";
    
78.         #sound-dai-cells = <0>;
    
79. };
    

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firefly_zhongw

1. 数字音频总线跟内置codec mic是不一样的通道
2. 数字音频接口数据拼接： capture,channel-mapping = <6, 2>;表示pdm占据前6ch，i2s占据后2ch，构成录音8ch
3. 如果要用内置的codec mic录音就要配置内置codec并检查原理图上的耳机座子是否有接入mic

firefly_zhongw

1.可以同时工作，只要gpio口不复用
2. ROC-RK3308-CC和ROC-RK3308B-CC是不同的开发板，拿到的开发板找对应的原理图

firefly_zhongw

1. 先确定开发板的型号
2. ROC-RK3308-CC开发板耳机座子没有接mic

firefly_zhongw

1. kernel/arch/arm64/boot/dts/rockchip/rk3308-roc-cc-dmic-pdm_emmc.dts修改文件贴出来
2. 从arecord -l看，声卡设备0都没有

arecord -l查看到的设备如下：# arecord -l
**** List of CAPTURE Hardware Devices ****
card 7: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 7: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7

firefly_zhongw

1. &i2s_8ch_2 {
   
2.         status = "okay";
   
3. };

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1. &acodec {
   
2.         rockchip,micbias1;
   
3.         rockchip,micbias2;
   
4.         rockchip,en-always-grps = <0 1 2 3>;
   
5.         rockchip,adc-grps-route = <3 0 1 2>;
   
6.         /delete-property/rockchip,loopback-grp;
   
7. };

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具体参考附件dts

firefly_zhongw

手头上没有ROC-RK3308-CC V13的开发板

firefly_zhongw

录音通道有效性，要看硬件上接了几个mic

firefly_zhongw

以开发板上的版本丝印为准，找对应的原理图。