hi all：
I transplant alsa-lib-1.0.22 & alsa-utils-1.0.22 for AT91SAM9G20;
when i use aplay or arecord; there is no error, but also no sound;

amixer set Master 70%
amixer set Capture 70%
amixer set PCM 70%
amixer: Unable to find simple control 'PCM',0

amixer contents :
numid=2,iface=MIXER,name='Master Playback ZC Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=1,iface=MIXER,name='Master Playback Volume'
; type=INTEGER,access=rw------,values=2,min=0,max=127,step=0
: values=121,121
numid=4,iface=MIXER,name='Line Capture Switch'
; type=BOOLEAN,access=rw------,values=2
: values=off,off
numid=5,iface=MIXER,name='Mic Boost (+20dB)'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=8,iface=MIXER,name='ADC High Pass Filter Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=6,iface=MIXER,name='Capture Mic Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=3,iface=MIXER,name='Capture Volume'
; type=INTEGER,access=rw------,values=2,min=0,max=31,step=0
: values=23,23
numid=10,iface=MIXER,name='Playback De-emphasis'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'None'
; Item #1 '32Khz'
; Item #2 '44.1Khz'
; Item #3 '48Khz'
: values=0
numid=11,iface=MIXER,name='Input Mux'
; type=ENUMERATED,access=rw------,values=1,items=2
; Item #0 'Line In'
; Item #1 'Mic'
: values=0
numid=14,iface=MIXER,name='Output Mixer HiFi Playback Swit'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=12,iface=MIXER,name='Output Mixer Line Bypass Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=13,iface=MIXER,name='Output Mixer Mic Sidetone Switc'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=7,iface=MIXER,name='Sidetone Playback Volume'
; type=INTEGER,access=rw------,values=1,min=0,max=3,step=0
: values=3
numid=9,iface=MIXER,name='Store DC Offset Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
I can not find the PCM control;


cat /proc/asound/card0/oss_mixer
VOLUME "Master" 0
BASS "" 0
TREBLE "" 0
SYNTH "" 0
PCM "" 0
SPEAKER "" 0
LINE "Line" 0
MIC "" 0
CD "" 0
IMIX "" 0
ALTPCM "" 0
RECLEV "" 0
IGAIN "Capture" 0
OGAIN "" 0
LINE1 "" 0
LINE2 "" 0
LINE3 "" 0
DIGITAL1 "" 0
DIGITAL2 "" 0
DIGITAL3 "" 0
PHONEIN "" 0
PHONEOUT "" 0
VIDEO "" 0
RADIO "" 0
MONITOR "" 0


so what is the problem???
Thanks!

I had the same issue in my custom board.

I am using kernel 2.6.30 on AT91SAM9G20 board.

Any suggestion to solve the problem?

thanks.

Hi there

Have you performed the standard sanity checks?
. verify that all necessary drivers are properly configured and installed;
. check `dmesg` (i.e. syslog) for any driver messages
. the device node numbers and attributes (char?) in /dev match the driver code.

If you still cannot figure it out, then it's time to add printk()s to the driver and recompile. If you still get nothing and you're really stumped, then be sure to output messages from the probe, load and unload routines to catch driver module issues.

Regards

this is the module loaded:

root@vulcano-g20:~# lsmod
Module Size Used by
snd_soc_sam9g20_wm8731 4000 0
snd_soc_atmel_ssc_dai 5328 1 snd_soc_sam9g20_wm8731
snd_soc_atmel_pcm 5116 1 snd_soc_sam9g20_wm8731
snd_soc_wm8731 12332 1 snd_soc_sam9g20_wm8731
snd_soc_core 46604 4 snd_soc_sam9g20_wm8731,snd_soc_atmel_ssc_dai,snd_soc_atmel_pcm,snd_soc_wm8731
g_serial 21796 0

I tried to play an mp3 with the command:

mplayer -ao alsa -mixer-channel 'Master' /home/root/music.mp3

It seems is reading and playing the music but nothing is present on the LHPOUT or RHPOUT

the dmesg report the following messages:

i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2
i2c-adapter i2c-0: NAK from device addr 0x1b msg #0
i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2
i2c-adapter i2c-0: NAK from device addr 0x1b msg #0
i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2
i2c-adapter i2c-0: NAK from device addr 0x1b msg #0
i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2
i2c-adapter i2c-0: NAK from device addr 0x1b msg #0
i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2
i2c-adapter i2c-0: NAK from device addr 0x1b msg #0
i2c-adapter i2c-0: master_xfer[0] W, addr=0x1b, len=2


Any suggestions?

Thanks.

Some more info...
I think it is strange that aplay-L doesn't report any PCM device!?!
Any suggestion is welcome.

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: AT91SAMG20EK [AT91SAMG20-EK], device 0: WM8731 PCM WM8731-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

aplay -L
null
Discard all samples (playback) or generate zero samples (capture)


cat /proc/asound/
AT91SAMG20EK/ cards oss/ seq/ version
card0/ devices pcm timers

cat /proc/asound/cards
0 [AT91SAMG20EK ]: WM8731 - AT91SAMG20-EK
AT91SAMG20-EK (WM8731)

cat /proc/asound/pcm
00-00: WM8731 PCM WM8731-0 : : playback 1 : capture 1

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

Hi

Post the dmesg and /etc/asound.state output.

Hi, was there any solution to this issue? I've got the same problem!

Thanks