omap3 and tps65930 audio

Hi JH,

Did you enable the audio support through TPS65930 driver ?

Please refer the following TI link to learn how to interface audio section to processor.

http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=swcu059

Hi,Titus

Thanks your answer,I can enable the tps65930's driver,and i can get sound from headset port.But i have a machine,it connect the earphone port,i don't know how to modify the twl4030's sourcecode to enable the earphone to support my equipment,And I think my hardware is no problem.please help me ,thank you! 

Hi JH,

Have you modified the "sound/soc/codecs/twl4030.c" file for audio make it to work ?

Hi,Titus

Yes ,I have modified it ,I add the "twl4030_write_reg_cache(codec, TWL4030_REG_EAR_CTL, 0x25);//2014-07-22 hj add enable earphone" in source code,and it worked,Now,I can get sound from EAR port. But My GPRS equipment connect the TPS65930's I2S port,and my GPRS equipment support I2S audio ,When I make a call,I can't listen the echo from the earphone.So what can i do?Please help.Thank you!

Hi JH,

Now, You able to listen audio from earphone side right ?, may be you have to look into the GPRS software or AT commands.

Also, How did you connect your I2S connection of GPRS ?

I think, you have to connect I2S connection of GPRS modem to processor I2S (McBSP peripheral) connections.

Hi,Titus,

Thanks for your patience answer,My design schematic as follow,

As you see, I connect the GPRS's I2S to TPS65950's I2S port,Can it work?Eager to answer your !

      Thanks !

Hi JH,

Please refer the below link. (chapter 13.2.2)

http://www.droid-developers.org/wiki/File:Tps65930_TRM.pdf

Your schematic seems to be good that have I2S connection of GPRS modem to PMIC chip of I2S.

Also, You have to check the connection of MIC signals and LINEOUT signals of PMIC chip, these signals should be connected to speaker and MIC hw.

If everything seems to be good, then probe the I2S signals and LINEOUT and MIC signals while making the call through GPRS modem (echo or what ever ).

Hi,Titus

I try all AT command about the Audio,But it still dose not work.I connect the GPRS I2S port to TPS65950/TPS65930's I2S port,Do you think this is correct?If this is correct,What do i need to change or modify in TWL4030 source code?

Thank you very much! 

Hi JH,

Have you probed the signal on I2S interface while making the call through GPRS modem (echo or what ever ) ?

Hi,Titus

I am sorry, I found my schematic to use the PCM port,and GPRS also used PCM modem, and it can support CLOCK is bellow:

And I haven't tested the SINGAL On clk PIN,Because there is not a test point on  my PCB.Please give some suggestions~ Thank you!