Sound on Olimex A20 Micro


B. Howell
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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

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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
}

 

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