RK3308 2通道模拟MIC无法录音

zhangfengzan · 发表于 2020-3-20 16:05:04

pdm_i2s_dais: pdm-i2s-dais {
            status = "okay";
            compatible = "rockchip,rk3308-multi-dais", "rockchip,multi-dais";
            dais = <&pdm_8ch>, <&i2s_8ch_2>;
            capture,channel-mapping = <6 2>;
            playback,channel-mapping = <0 2>;
            bitclock-inversion = <1 0>;
      };
我用的RK3308-ROC-CC请教下，我插入耳机录音为什么录到的所有通道都是空的，没数据，按理说前6个通道没数据，最后2个通道有数据的啊？能解释下吗？谢谢

firefly_zhongw · 发表于 2020-3-21 14:47:06

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

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
index b996358..735ddb2 100644
--- 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
@@ -13,7 +13,7 @@
compatible = "firefly,rk3308-roc-cc-dmic-pdm_emmc", "firefly,rk3308";
pdm_i2s_dais: pdm-i2s-dais {
- status = "okay";
+ status = "disabled";
compatible = "rockchip,rk3308-multi-dais", "rockchip,multi-dais";
dais = <&pdm_8ch>, <&i2s_8ch_2>;
capture,channel-mapping = <6 2>;
@@ -34,13 +34,23 @@
};
vad-sound {
- status = "okay";
+ status = "disabled";
compatible = "rockchip,multicodecs-card";
rockchip,card-name = "rockchip,rk3308-vad";
rockchip,cpu = <&pdm_i2s_dais>;
rockchip,codec = <&acodec>, <&vad>;
};
+ vad_acodec_sound: vad-acodec-sound {
+ status = "okay";
+ compatible = "rockchip,multicodecs-card";
+ rockchip,card-name = "rockchip,rk3308-acodec";
+ rockchip,codec-hp-det;
+ rockchip,mclk-fs = <256>;
+ rockchip,cpu = <&i2s_8ch_2>;
+ rockchip,codec = <&acodec>, <&vad>;
+ };
+
leds {
status = "okay";
compatible = "gpio-leds";
@@ -63,6 +73,14 @@
status = "disabled";
};
+&acodec {
+ rockchip,micbias1;
+ rockchip,micbias2;
+ rockchip,en-always-grps = <0 1 2 3>;
+ rockchip,adc-grps-route = <0 1 2 3>;
+ /delete-property/rockchip,loopback-grp;
+};
+
&bluetooth_sound {
status = "okay";
};
@@ -74,7 +92,7 @@
};
&pdm_8ch {
- status = "okay";
+ status = "disabled";
#sound-dai-cells = <0>;
rockchip,no-dmaengine;
pinctrl-names = "default";
@@ -88,7 +106,7 @@
&vad {
status = "okay";
- rockchip,audio-src = <&pdm_8ch>;
+ rockchip,audio-src = <&i2s_8ch_2>;
rockchip,det-channel = <0>;
rockchip,mode = <1>;
rockchip,buffer-time-ms = <200>;
@@ -102,7 +120,7 @@
};
&pdm_i2s_dais {
- status = "okay";
+ status = "disabled";
#sound-dai-cells = <0>;
};

复制代码

firefly_zhongw · 发表于 2020-3-23 10:45:49

本帖最后由 firefly_zhongw 于 2020-3-23 11:19 编辑

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

zhangfengzan · 发表于 2020-3-23 13:03:18

本帖最后由 zhangfengzan 于 2020-3-23 13:46 编辑

MIC是有的，第一环就是，应该是美标的。我的意思就是i2s_8ch_2和pdm不能同时work的吗？按理说不用配的啊，i2s_8ch_2播音的时候（adc）,pdm也是使能的啊，耳机能听到声音不需要配的啊

firefly_zhongw · 发表于 2020-3-23 14:21:32

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

sai-blf · 发表于 2020-3-31 23:07:29

firefly_zhongw 发表于 2020-3-21 14:47
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

你好，我按照上面的修改，耳机mic录不到音，aplay播音耳机也不出声，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

录音指令采用：arecord -D hw:7,0 -c 8 -r 16000 -f S16_LE --period-size=1024 --buffer-size=4096 mic7-0.wav和
                     arecord -D hw:7,1 -c 8 -r 16000 -f S16_LE --period-size=1024 --buffer-size=4096 mic7-0.wav
录到的文件无声。
请问这是哪里不对呢？

firefly_zhongw · 发表于 2020-4-1 09:10:18

本帖最后由 firefly_zhongw 于 2020-4-1 09:11 编辑

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

sai-blf · 发表于 2020-4-1 18:37:01

本帖最后由 sai-blf 于 2020-4-1 18:51 编辑

firefly_zhongw 发表于 2020-4-1 09:10
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

开发板型号是：ROC-RK3308-CC；看的原理图是roc-rk3308-cc-v1_3.pdf，所以一直认为有mic。roc-rk3308-cc_v00.pdf原理图确实没有mic，同时也没有模拟mic录音。按照上面的改法，aplay耳机没声音，怎么回事呢？

sai-blf · 发表于 2020-4-1 18:58:58

sai-blf 发表于 2020-4-1 18:37
开发板型号是：ROC-RK3308-CC；看的原理图是roc-rk3308-cc-v1_3.pdf，所以一直认为有mic。roc-rk3308-cc_ ...

公司有种类型的板子，我在V13的版本上测的，有mic录音

firefly_zhongw · 发表于 2020-4-2 09:50:11

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

[技术讨论] RK3308 2通道模拟MIC无法录音

【技术讨论】 RK3308 2通道模拟MIC无法录音

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