[alsa-devel] [PATCH 1/2] ARM: DTS: kirkwood-openrd-client: fix audio

[Aaro Koskinen]

Hi,

On Sun, Jan 24, 2016 at 07:26:43PM -0800, Rick Thomas wrote:
> > root at base:~# cat /proc/asound/devices 
> >   2: [ 0]   : control
> >   3: [ 0- 0]: digital audio playback
> >   4: [ 0- 0]: digital audio capture
> >  33:        : timer
> > root at base:~# cat /proc/asound/cards   
> >  0 [i2scs42l51hifi ]: i2s-cs42l51-hif - i2s-cs42l51-hifi
> >                       i2s-cs42l51-hifi
> 
> Full of hope, I did "aptitude install mp321" which went without any visible problems.
> 
> Then hooked up a pair of earphones to the "speaker" plug on the Client and ran
> 
> > root at base:~# mpg321 -v /tmp/Jersey.mp3 
> > High Performance MPEG 1.0/2.0/2.5 Audio Player for Layer 1, 2, and 3.
> > Version 0.3.2-1 (2012/03/25). Written and copyrights by Joe Drew,
> > now maintained by Nanakos Chrysostomos and others.
> > Uses code from various people. See 'README' for more!
> > THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY! USE AT YOUR OWN RISK!
> > Title	: The Jersey Bounce              Artist : Zazuzaz                       
> > Album	: An Evening with ZaZuZaz        Year	 : 2000
> > Comment : Amazon.com Song ID: 201809221  Genre : Jazz                          
> > 
> > Directory: /tmp
> > Playing MPEG stream from Jersey.mp3 ...
> > MPEG 1.0, Layer: III, Freq: 44100, mode: Joint-Stereo, modext: 0, BPF : 2560
> > Channels: 2, copyright: No, original: Yes, CRC: No, emphasis: 0.
> > Bitrate: 128 Kbits/s, Extension value: 0
> > Audio: 1:1 conversion, rate: 44100, encoding: signed 16 bit, channels: 2
> > ALSA lib pcm.c:2267:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front
> > ^C                                                                            
> > [0:20] Decoding of Jersey.mp3 finished.
> 
> So it seemed to be running OK...  But there was no sound in the
> earphones. I also tried adding option "-g 50" to set the gain explicitly.
> Still no sound.
> 
> Is there a hardware jumper I need to set to activate sound on the
> OpenRD Client board?

On my board I need to say "amixer set PCM on". Can you post the full
output from "amixer" without any parameters?

Also check if you have this line in dmesg:

	asoc-simple-card sound: cs42l51-hifi <-> i2s mapping ok

If it says "spdif" the player runs but is silent.

A.