Sound on Olimex A20 Micro

[B. Howell]

Hello All,

Trying to get sound working on my A20 micro.

After switching to the Mainline kernel, the sun4i_codec loads and everything seems to be there. But alsamixer, aplay, etc all say that there's no such device. Running as root does not help so this is not a permissions issue.

mute@micro:~$ uname -a
Linux micro 4.14.18-sunxi #24 SMP Fri Feb 9 16:24:32 CET 2018 armv7l GNU/Linux

mute@micro:~$ dmesg |grep sun4i-codec
[   10.491588] sun4i-codec 1c22c00.codec: Codec <-> 1c22c00.codec mapping ok
  
mute@micro:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sun4icodec [sun4i-codec], device 0: CDC PCM Codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

mute@micro:~$ alsamixer
cannot open mixer: No such device

mute@micro:~$ lsmod |grep snd
snd_soc_core          118784  1 sun4i_codec
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_pcm                65536  2 snd_pcm_dmaengine,snd_soc_core
snd_timer              24576  1 snd_pcm
snd                    45056  3 snd_timer,snd_soc_core,snd_pcm
soundcore              16384  1 snd

mute@micro:~$ speaker-test 

speaker-test 1.0.28

Playback device is default
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
ALSA lib pcm_hw.c:1667:(_snd_pcm_hw_open) Invalid value for card
Playback open error: -19,No such device

I would be most grateful for any suggestions.

 

-B

[guidol]

14 minutes ago, B. Howell said:

 

 
mute@micro:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sun4icodec [sun4i-codec], device 0: CDC PCM Codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

 

 

aplay -l looks fine (Card 0 - Subdevice 0)
now you can check if you got a /etc/asound.conf like this:
 

pcm.!default {
    type hw
    card 0
    device 0
}

ctl.!default {
    type hw
    card 0
}

 

[B. Howell]

Yes! That was the last problem. asound.conf was still set to use hdmi output. Working nicely now.

 

Now, a little more hacking and I'll have my internet radio.

 

Big thanks from Berlin!

[guidol]

25 minutes ago, B. Howell said:

Big thanks from Berlin!

Gern geschehen aus Mudanya/Tuerkei  Viel Spass mit dem Sound am A20
(bin normal aus Frankfurt, wohne aber seit 1.5 Jahren hier in der Tuerkei)

[B. Howell]

Es ist in Februar bistimmt ganz angenehm da am Bosporus. Bin selbst aus den USA aber seit 11 Jahre hier in Babylon.