如何使用板子的usb audio gadget 功能，让他作为一个声卡

现在手上有一块rk3308板子，支持uac功能，仅有一个usb otg接口，目前想把这块板子当成一个usb声卡，但是自己做不了驱动，也没想做驱动，就想着能否使用uac功能，目前有两种情况
1、在内核配置

在 kernel 中执行

make rk3308_linux_defconfig

make menuconfig



device drivers-->

     <*>usb support -->

          <*>usb gadget support-->

                  <*> usb gadget drivers (audio gadget)

                           audio gadget

                  <*>           uac 1.0

该选项选中后，编译烧写进去板子，windows端识别到ac interface 

音频设备与usb枚举log：

[    0.556550] ALSA device list:

[    0.556588]   #0: UAC1_Gadget 0

[    0.556608]   #1: rockchip,rk3308-pcm

[    0.556629]   #2: rockchip,rk3308-vad

[    0.556687]   #7: Loopback 1

[    0.559306] VFS: Mounted root (squashfs filesystem) readonly on device 31:6.

[    0.560543] devtmpfs: mounted

[    0.560835] Freeing unused kernel memory: 320K

[    0.567647] dwc2 ff400000.usb: new address 11

[    0.762785] dwc2 ff400000.usb: new device is high-speed

[    0.795656] dwc2 ff400000.usb: new address 12

[    0.818172] g_audio gadget: high-speed config #1: Linux USB Audio Gadget



eq/drc 程序运行log



==========EQ/DRC process release version 1.23===============

snd_pcm_open

snd_pcm_hw_params_malloc

snd_pcm_hw_params_any!

snd_pcm_hw_params_set_access!

snd_pcm_hw_params_set_format

channels = 2

bufferSize = 20480

periodSize = 1024

Rate = 48000

Open record device done

Open PCM: fake_play

[    3.494665] dwmmc_rockchip ff4a0000.dwmmc: Busy; trying anyway

[    3.494707] mmc_host mmc0: Timeout sending command (cmd 0x202000 arg 0x0 status 0x0)

interleaved mode

snd_pcm_hw_params_alloca

interleaved mode

format successed

     3.507831]c hmamncn_eholsst  =m m2c0:

Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)

setting sampling rate (48000)

write_bufferSize = 4096

write_periodSize = 1024

rk eq_drc v2.02 2019-07-20 Oct 11 2019 09:26:56

psEqualizer->m_pfControlValue = 0.000000

open write device is successful

WAKE_LOCK[RK_acquire_wake_lock] id=eq_drc_process

param_name = /data/cfg/eq_bin/Para_48000Hz_2ch.bin

EQ/DRC Algorithm 3BAND_IIR_DIVFREQ PEAK VALUE V1.0...Oct 11 2019 09:26:56

GetLMTVersion v1.03 2019-10-10 Oct 11 2019 09:26:57,force=0 firstInit=1

windows已经能够识别到音频设备和麦克风了，可以直接使用Windows10 的录音机 进行录音会出现如下错误，
====read frame error = -32===
Overrun occurred: -32
ALSA lib pcm.c:8905:(snd_pcm_recover) overrun occurred
====write frame error = -32===
Underrun occurred from write: -32
ALSA lib pcm.c:8905:(snd_pcm_recover) underrun occurred
rk eq_drc v2.02 2019-07-20 Oct 11 2019 09:26:56
psEqualizer->m_pfControlValue = 0.000000
param_name = /data/cfg/eq_bin/Para_48000Hz_2ch.bin
EQ/DRC Algorithm 3BAND_IIR_DIVFREQ PEAK VALUE V1.0...Oct 11 2019 09:26:56
GetLMTVersion v1.03 2019-10-10 Oct 11 2019 09:26:57,force=0 firstInit=1

这个实在不知道可以怎样操作，还是说我的方式不对，还要自己去添加或者说修改代码，有了相关的驱动可以识别，调用的时候会用到什么插件或者接口，这些我需要到哪里去找，。