[alsa-devel] TWL4030 Line In/Out Loopback issue
I'verealized that there is a loopback dependency between the audioinput/output dependency with the 2.6.38 kernel running on a gumstix overo and also using the 2.6.35 kernel running on the Beaglenboard.
You can replicate this issue by plugging some music into the Line injack and then fire up alsamixer. Then you would need to modify theDAC2 Dig level, the one on the right no the left. As you lower thevolume you'll hear your music input decreasing and as you increase itthe music level would increase. If you lower it enough you can captureaudio from the input jack without hearing it out of your speaker butthe bad thing is that also controls your speaker output so if you tryto play some sound out of gumstix/beagleboard you won't be able to do because youneed to increase your DAC2 Dig level in alsamixer ... it's a catch22!! I couldn't find any solutions readily.
I am running a console-only Angstrom image on both boards. I've used the Beagleboard's line in/out capabilities with no issues using the 2.6.29 kernel in the past so is there an update in the TWL4030 ALSA driver that I should take into account? thanks
al fayez
Hi,
On Monday 08 August 2011 02:27:45 Almohanad Fayez wrote:
I'verealized that there is a loopback dependency between the audioinput/output dependency with the 2.6.38 kernel running on a gumstix overo and also using the 2.6.35 kernel running on the Beaglenboard.
I can not recall seeing such an issue.
You can replicate this issue by plugging some music into the Line injack and then fire up alsamixer. Then you would need to modify theDAC2 Dig level, the one on the right no the left. As you lower thevolume you'll hear your music input decreasing and as you increase itthe music level would increase. If you lower it enough you can captureaudio from the input jack without hearing it out of your speaker butthe bad thing is that also controls your speaker output so if you tryto play some sound out of gumstix/beagleboard you won't be able to do because youneed to increase your DAC2 Dig level in alsamixer ... it's a catch22!! I couldn't find any solutions readily.
Have you checked the state of the Left/Right Digital Loopback? Is it set to 0?
I am running a console-only Angstrom image on both boards. I've used the Beagleboard's line in/out capabilities with no issues using the 2.6.29 kernel in the past so is there an update in the TWL4030 ALSA driver that I should take into account? thanks
Could you post the content of the /sys/devices/platform/soc-audio/wl4030-codec/dapm_widget file to see what's going on?
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.
al fayez
root@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
-----Original Message----- From: Péter Ujfalusi peter.ujfalusi@ti.com To: alsa-devel alsa-devel@alsa-project.org Cc: Almohanad Fayez alfayez@aol.com Sent: Mon, Aug 8, 2011 4:56 am Subject: Re: [alsa-devel] TWL4030 Line In/Out Loopback issue
Hi,
On Monday 08 August 2011 02:27:45 Almohanad Fayez wrote:
I'verealized that there is a loopback dependency between the audioinput/output dependency with the 2.6.38 kernel running on a gumstix overo and also using the 2.6.35 kernel running on the Beaglenboard.
I can not recall seeing such an issue.
You can replicate this issue by plugging some music into the Line injack and then fire up alsamixer. Then you would need to modify theDAC2 Dig level, the one on the right no the left. As you lower thevolume you'll hear your music input decreasing and as you increase itthe music level would increase. If you lower it enough you can captureaudio from the input jack without hearing it out of your speaker butthe bad thing is that also controls your speaker output so if you tryto play some sound out of gumstix/beagleboard you won't be able to do because youneed to increase your DAC2 Dig level in alsamixer ... it's a catch22!! I couldn't find any solutions readily.
Have you checked the state of the Left/Right Digital Loopback? Is it set to 0?
I am running a console-only Angstrom image on both boards. I've used the Beagleboard's line in/out capabilities with no issues using the 2.6.29 kernel in the past so is there an update in the TWL4030 ALSA driver that I should take into account? thanks
Could you post the content of the /sys/devices/platform/soc-audio/wl4030-codec/dapm_widget file to see what's going on?
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@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,
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@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@ti.com To: Almohanad Fayez alfayez@aol.com Cc: alsa-devel alsa-devel@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@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?
participants (2)
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Almohanad Fayez -
Péter Ujfalusi