[alsa-devel] TWL4030 Line In/Out Loopback issue

[Almohanad Fayez]

Péter,

 Using "amixer -c0" I was able to find that Digital Loopback was set 86% I set it to 0 and now everything works great!  Thanks for your help I didn't realize that alsamixer doesn't reveal all the controls.  Regarding the dapm_widget values, I copied them without running play nor record the reason being I was hearing the Loopbacked audio without having to run any utilities.  I'm including the new dapm_widget output during record after I set the Loopback value to 0.

Thanks again for your help I really appreciate it.

al fayez



 root at usrp-e1xx:~# cat /sys/devices/platform/soc-audio/TWL4030/dapm_widget 
Headset Mic Bias: Off
Mic Bias 2: Off
Mic Bias 1: Off
micbias2 select: Off
micbias1 select: Off
Digimic1 Enable: Off
Digimic0 Enable: Off
ADC Physical Right: On
ADC Physical Left: On
Analog Right: On
Analog Left: On
ADC Virtual Right2: On
ADC Virtual Left2: On
ADC Virtual Right1: On
ADC Virtual Left1: On
HandsfreeR PGA: Off
HandsfreeL PGA: Off
CarkitR PGA: Off
CarkitR Mixer: Off
CarkitL PGA: Off
CarkitL Mixer: Off
HeadsetR PGA: Off
HeadsetR Mixer: Off
HeadsetL PGA: Off
HeadsetL Mixer: Off
PredriveR PGA: Off
PredriveR Mixer: Off
PredriveL PGA: Off
PredriveL Mixer: Off
Earpiece PGA: Off
Earpiece Mixer: Off
AIF Enable: On
APLL Enable: Off
Analog Voice Playback Mixer: Off
Analog L2 Playback Mixer: Off
Analog R2 Playback Mixer: Off
Analog L1 Playback Mixer: Off
Analog R1 Playback Mixer: Off
Digital Voice Playback Mixer: Off
Digital L2 Playback Mixer: Off
Digital R2 Playback Mixer: Off
Digital L1 Playback Mixer: Off
Digital R1 Playback Mixer: Off
FM Loop Enable: Off
DAC Voice: Off
DAC Left2: Off
DAC Right2: Off
DAC Left1: Off
DAC Right1: Off
PM State: On


 

-----Original Message-----
From: Péter Ujfalusi <peter.ujfalusi at ti.com>
To: Almohanad Fayez <alfayez at aol.com>
Cc: alsa-devel <alsa-devel at alsa-project.org>
Sent: Tue, Aug 9, 2011 2:40 am
Subject: Re: Re: [alsa-devel] TWL4030 Line In/Out Loopback issue


On Monday 08 August 2011 17:01:11 Almohanad Fayez wrote:
>  Péter,
> 
> I can't seem to find a Left/Right Digital Loopback the mention of a loop I
> found is an FM Loop Enable.  The following is the dapm_widget enable output
> from my Gumstix Overo running the 2.6.38 Kernel.  Thanks for your help.

Look for the control:
amixer -c0

Look for the Left/Right Digital Loopback in the list, and check the value

> root at usrp-e1xx:~# cat /sys/devices/platform/soc-audio/TWL4030/dapm_widget
> Headset Mic Bias: Off
> Mic Bias 2: Off
> Mic Bias 1: Off
> micbias2 select: Off
> micbias1 select: Off
> Digimic1 Enable: Off
> Digimic0 Enable: Off
> ADC Physical Right: On
> ADC Physical Left: On
> Analog Right: On
> Analog Left: On
> ADC Virtual Right2: Off
> ADC Virtual Left2: Off
> ADC Virtual Right1: Off
> ADC Virtual Left1: Off
> HandsfreeR PGA: Off
> HandsfreeL PGA: Off
> CarkitR PGA: Off
> CarkitR Mixer: Off
> CarkitL PGA: Off
> CarkitL Mixer: Off
> HeadsetR PGA: On
> HeadsetR Mixer: On
> HeadsetL PGA: On
> HeadsetL Mixer: On
> PredriveR PGA: Off
> PredriveR Mixer: Off
> PredriveL PGA: Off
> PredriveL Mixer: Off
> Earpiece PGA: Off
> Earpiece Mixer: Off
> AIF Enable: On
> APLL Enable: Off
> Analog Voice Playback Mixer: Off
> Analog L2 Playback Mixer: On
> Analog R2 Playback Mixer: On
> Analog L1 Playback Mixer: Off
> Analog R1 Playback Mixer: Off
> Digital Voice Playback Mixer: Off
> Digital L2 Playback Mixer: On
> Digital R2 Playback Mixer: On
> Digital L1 Playback Mixer: Off
> Digital R1 Playback Mixer: Off
> FM Loop Enable: Off
> DAC Voice: Off
> DAC Left2: Off
> DAC Right2: Off
> DAC Left1: Off
> DAC Right1: Off
> PM State: On

Hrm,
It does seams that the digital loopback is enabled from this.
You had only capture running while taken this, right?

-- 
Péter