Asoc with TWL4030 on overo

Hi

I am trying to play sound on overo board. With latest kernel I cannot get any sound, while with kernel 2.6.33-rc6-07400-ga05966f-dirty sound is played by ALSA correctly. I am using ALSA 1.0.22 with asound.conf like this:
pcm.dsp0 {
type plug
slave.pcm "dmix"
}

ctl.mixer0 {
type hw
card 0
}

With both kernels I get the same output, and when I execute aplay or amixer everything looks correctly.

Kernel output:
cpuidle: using governor menu
No device for DAI omap-mcbsp-dai-0
No device for DAI omap-mcbsp-dai-1
No device for DAI omap-mcbsp-dai-2
No device for DAI omap-mcbsp-dai-3
No device for DAI omap-mcbsp-dai-4
overo SoC init
asoc: twl4030 <-> omap-mcbsp-dai-0 mapping ok
ALSA device list:
#0: overo (twl4030)

# cat /proc/asound/cards 
 0 [overo          ]: twl4030 - overo
                      overo (twl4030)

# cat /proc/asound/devices 
  0: [ 0]   : control
 16: [ 0- 0]: digital audio playback
 24: [ 0- 0]: digital audio capture
 33:        : timer

Regards,
Rok

Rok Markovič
Kanardia d.o.o.
Ul. heroja Rojška 70
SI-3000 Celje

Tel: +386 40 360 963
Fax: +386 590 11 416
E-mail: [email protected]
URL: www.kanardia.eu
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Hi

Beagle plays fine on linux-omap head. One reason could be the patch below as it requires that the user space must activate the headset output path by proper mixer settings.

commit e47c796d58a21fc58b00dffb7265bb66de987773

Author: Peter Ujfalusi <[email protected]>
Date:   Wed Feb 17 09:49:54 2010 +0200

ASoC: TWL4030: Use codec defaults for Headset initial configuration

Disable the amplifiers for the headset outputs, and do not select routings by default to the headset outputs.

Does it work if you active the Headset path?

amixer set -D hw:0 'Headset' 0dB
amixer set -D hw:0 'HeadsetL Mixer AudioL2' on
amixer set -D hw:0 'HeadsetR Mixer AudioR2' on

Jarkko
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Yes muted sound was the culprit. :), why does not kernel enable sound by default and why are there so many mixer controls.

Rok

Dne četrtek 18 marca 2010 ob 15:40:02 je Jarkko Nikula napisal(a):

Rok Markovič
Kanardia d.o.o.
Ul. heroja Rojška 70
SI-3000 Celje

Tel: +386 40 360 963
Fax: +386 590 11 416
E-mail: [email protected]
URL: www.kanardia.eu
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It is difficult for the kernel to know what a sensible configuration is for all hardware at all times - much embedded hardware has a wide range of possible audio configurations, and often the choice depends not only on the hardware but also which sounds are being played.