Ok, let me go into details. I work on a custom device platform based on an Atmel at91sam9261. I wrote an alsa driver composed of 2 files (sound/soc/atmel/myplateform_q2686.c and sound/soc/codecs/q2686.c) and I also add this line into arch/arm/mach-at91/board-myplateform.c : at91_add_device_ssc(AT91SAM9261_ID_SSC0, ATMEL_SSC_TX | ATMEL_SSC_RX); When I boot my device I can see that : Q2686 SoC Audio Codec 0.2 asoc: Q2686 <-> atmel-ssc0 mapping ok ALSA device list: #0: MYPLATFORM (Q2686) And everything ok with playback : # aplay -c 1 tone.wav But when I want to record a pcm stream I have this error: # arecord -v -c 1 -t wav -f S16_LE -r 8000 -d 10 input.wav arecord: pcm_read:1629: read error: Input/output error Any more idea? Raymond Yau wrote: > which device are you using ? ( pulseaudio , dmix or default device defined > in /usr/share/alsa/cards/*.conf ) > > post output of > > arecord -v -c 1 -t wav -f S16_LE -r 8000 -d 10 input.wav > > 2010/1/5 Marc Garnier <marc.garnier@xxxxxxxxxx> > > >> Hi, >> >> I have the same kind of problem. I try to capture PCM stream thanks to >> areacord : >> # arecord -c 1 -t wav -f S16_LE -r 8000 -d 10 input.wav >> >> 30 seconds later I have the folowing message : >> # arecord: pcm_read:1629: read error: Input/output error >> >> I can observe the PCM stream on an oscilloscope but no interrupt are >> catched by the system (AIC ss0 counter remains at zero ) : >> # cat /proc/interrupts >> CPU0 >> 1: 275059 AIC at91_tick, rtc0, ttyS0 >> 7: 179 AIC ttyS2 >> 9: 11 AIC mmc0 >> 13: 0 AIC atmel_spi.1 >> 14: 0 AIC ssc0 >> 82: 1 GPIO alerte >> 107: 9464 GPIO eth0 >> >> Any idea? >> >> >> >> > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
