The Tlv320aic20k 's digital loop back is OK,but the Analog loop back can not work. my control register 's configuration is as follows:
control register 1：0x4d//Analog loop back or 0x4b//digital loop back
control register 2：0xa0
control register 3a: 0x01
control register 3b：0x60
control register 3c: 0x82
control register 4: 0x83
control register 5a: 0x0a
control register 5b: 0x40
control register 5c:0xbf
control register 5d:0xf0
control register 6a:0x1
control register 6b：0x8f
