UIS7862S 硬件上只有主mic无辅mic，录像选择辅mic录像无声音

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[QUESTION]
硬件上只有主mic无辅mic，录像选择辅mic录像无声音

[ANSWER]
参考如下配置，如果是smart pa的话，配置在同目录的名字带smart_pa的xml中修改。
/device/sprd/对应项目/对应工程/rootdir/system/etc/audio_policy_config/primary_audio_policy_configuration.xml

1. @@ -5,7 +5,6 @@
   
2.      <item>Speaker</item>
   
3.      <item>Earpiece</item>
   
4.      <item>Built-In Mic</item>
   
5. -    <item>Built-In Back Mic</item>
   
6.    </attachedDevices>
   
7.    <defaultOutputDevice>Speaker</defaultOutputDevice>
   
8.    <mixPorts>
   
9. 
   
10. @@ -72,11 +71,6 @@
    
11.            samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
    
12.            channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
    
13.      </devicePort>
    
14. -    <devicePort tagName="Built-In Back Mic" type="AUDIO_DEVICE_IN_BACK_MIC" role="source">
    
15. -      <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
    
16. -           samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
    
17. -           channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
    
18. -    </devicePort>
    
19.      <devicePort tagName="Wired Headset Mic" type="AUDIO_DEVICE_IN_WIRED_HEADSET" role="source">
    
20.        <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
    
21.            samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
    
22. 
    
23. @@ -108,9 +102,9 @@
    
24.      <route type="mix" sink="BT SCO Car Kit"
    
25.         sources="primary output,Telephony Rx"/>
    
26.      <route type="mix" sink="primary input"
    
27. -        sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic,BT SCO Headset Mic"/>
    
28. +        sources="Built-In Mic,Wired Headset Mic,BT SCO Headset Mic"/>
    
29.      <route type="mix" sink="Telephony Tx"
    
30. -        sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic,BT SCO Headset Mic"/>
    
31. +        sources="Built-In Mic,Wired Headset Mic,BT SCO Headset Mic"/>
    
32.      <route type="mix" sink="voice_rx"
    
33.         sources="Telephony Rx"/>
    
34.    </routes>

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