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Recording failed , imx6q with wm8962

Question asked by 卫军 陈 on Jun 5, 2015
Latest reply on Jun 10, 2015 by 卫军 陈

Current BSP : yocto with branch of   imx_3.10.53_1.1.0-ga

Target Board: Custom board schematic circuit  is basically copy from  imx6qsabresd,

                        except the MCLK of wm8962 , we use 24MHz external crystal instead.

 

The Problem:

          I use the following command to test recording.

                         arecord -vv -t wav -fdat -d 10 rdfile.wav

 

          when i play the "rdfile.wav" file , there is no sound.

          I have checked "ADCDAT" pin of wm8962 while recording ,  there is no signal out.

          The power supply pins on wm8962 are all normal .

 

           I believe my  board is ok , because  i can record voice normally with the bsp of L3.0.35_4.1.0 on this board.

           So i compared wm8962 driver code between  the two bsps ,  try to find solution, but failed.

        

          Can any body tell me the solution or any advices ?

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