Linux/AM5728: GP EVM audio input

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I've tried this method.The results are as follows：

root@am57xx-evm:~# amixer sset 'Left PGA Mixer Mic3L' on
amixer: Unable to find simple control 'Left PGA Mixer Mic3L',0

The device tree configuration as follows：

sound0: sound@0 {
compatible = "simple-audio-card";
simple-audio-card,name = "BeagleBoard-X15";
simple-audio-card,widgets =
"Line", "Line Out",
"Line", "Line In";
simple-audio-card,routing =
"Line Out", "LLOUT",
"Line Out", "RLOUT",
"MIC2L", "Line In",
"MIC2R", "Line In";

/delete-property/The defination of DAI link
simple-audio-card,format = "dsp_b";
simple-audio-card,bitclock-master = <&sound0_master>;
simple-audio-card,frame-master = <&sound0_master>;
simple-audio-card,bitclock-inversion;

simple-audio-card,cpu {
sound-dai = <&mcasp3>;
};

sound0_master: simple-audio-card,codec {
sound-dai = <&tlv320aic3104>;
clocks = <&clkout2_clk>;
};
};

So I tried as  as follows：

root@am57xx-evm:~# amixer sset 'Left PGA Mixer Mic2R' on
Simple mixer control 'Left PGA Mixer Mic2R',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]\

But the recording is still failing

So I tried as as follows：
amixer sset 'Right PGA Mixer Mic2L' on
amixer sset 'Right PGA Mixer Mic2R' on
amixer sset 'Left PGA Mixer Mic2L' on
amixer sset 'Left PGA Mixer Mic2R' on

Hi,

Does your aplay -l or cat /proc/asound detect your sound card? If yes, then I think this is an alsa configuration issue..

Try turning off line in & turning on the MIC, something like:
processors.wiki.ti.com/.../DRA7xx_GLSDK_Software_Developers_Guide

Best Regards,
Yordan

root@am57xx-evm:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: BeagleBoardX15 [BeagleBoard-X15], device 0: davinci-mcasp.0-tlv320aic3x-hifi tlv320aic3x-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: H58040000encode [HDMI 58040000.encoder], device 0: HDMI 58040000.encoder snd-soc-dummy-dai-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

I have tried many times as the link.　All the results failed

Hi,

I am facing the same issue. Please help.

Regards,
Prav