[alsa-devel] Configure and use dmix with a new ASoC driver
Hi,
I don't know if there is something special I should do to be able to use dmix with my new ASoC driver I made (TLV320AIC23b codec running on a AT91RM9200 board).
The problem is when I try to use dmix with aplay, it doesn't work and I got this error message:
# aplay -v -D plug:dmix /media/usb0/tada.wav aplay: main:545: audio open error: Operation not permitted #
Listing of my /dev/snd:
# ls -al /dev/snd drwxr-xr-x 2 root root 0 Jan 1 00:01 . drwxr-xr-x 7 root root 0 Jan 1 00:01 .. crw-rw---- 1 root audio 116, 0 Jan 1 00:01 controlC0 crw-rw---- 1 root audio 116, 16 Jan 1 00:01 pcmC0D0p
Notice I have a default /usr/share/alsa/alsa.conf file too. I'm running ALSA 1.0.15. Of course, it works well when I play a sound without the -D plug:dmix parameter...
# aplay /media/usb0/tada.wav at91-ssc:ssc_startup: SSC_SR=0x000004c3 armus_tlv320aic23b: pck1 started asoc: aic23b <-> at91-ssc1 info: asoc: rate mask 0x6fe asoc: min ch 1 max ch 2 asoc: min rate 8000 max rate 96000 Playing WAVE '/media/usb0/tada.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo #
I tried to find some useful documentation about dmix but mainly it says that when we have a recent version of ALSA, we don't need to configure it because it's already done?
On Sat, Aug 16, 2008 at 06:27:02AM +0000, Simon Tremblay wrote:
# aplay -v -D plug:dmix /media/usb0/tada.wav aplay: main:545: audio open error: Operation not permitted
This doesn't ring any specific bells for me but since you are cross building and can play without dmix I would be looking at installation issues with your ALSA user space or a missing device file it needs. stracing aplay may well provide a useful clue as to what's missing.
Mark Brown <broonie <at> sirena.org.uk> writes:
On Sat, Aug 16, 2008 at 06:27:02AM +0000, Simon Tremblay wrote:
# aplay -v -D plug:dmix /media/usb0/tada.wav aplay: main:545: audio open error: Operation not permitted
This doesn't ring any specific bells for me but since you are cross building and can play without dmix I would be looking at installation issues with your ALSA user space or a missing device file it needs. stracing aplay may well provide a useful clue as to what's missing.
Thanks for the help, I used strace on aplay and I think it's that ouput is wrong:
open("/usr/lib/libasound.so.2", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0755, st_size=712960, ...}) = 0 close(3) = 0 open("/etc/group", O_RDONLY) = 3 ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbedc77a0) = -1 ENOTTY (Inappropriate ioctl for device) read(3, "root:x:0:\ndaemon:x:1:\nbin:x:2:\ns"..., 4096) = 204 close(3) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 1966080 SYS_300(0x1e0000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x1e0000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x1e0000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x1e0000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 1998848 SYS_300(0x1e8000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x1e8000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x1e8000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x1e8000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2031616 SYS_300(0x1f0000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x1f0000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x1f0000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x1f0000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2064384 SYS_300(0x1f8000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x1f8000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x1f8000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x1f8000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2097152 SYS_300(0x200000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x200000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x200000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x200000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2129920 SYS_300(0x208000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x208000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x208000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x208000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2162688 SYS_300(0x210000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x210000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x210000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x210000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2195456 SYS_300(0x218000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x218000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x218000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x218000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2228224 SYS_300(0x220000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x220000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x220000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x220000, 0, 0x100, 0, 0x26d00) = 0 SYS_299(0x56a4d5, 0x1, 0x3b0, 0xffffffff, 0x26d00) = 2260992 SYS_300(0x228000, 0, 0x102, 0xbedc7850, 0) = 0 SYS_300(0x228000, 0, 0x101, 0xbedc7850, 0) = 0 SYS_298(0x228000, 0xbedc788c, 0x2, 0x10, 0) = -1 EFBIG (File too large) SYS_300(0x228000, 0, 0x100, 0, 0x26d00) = 0 write(2, "aplay", 5aplay) = 5 write(2, ": ", 2: ) = 2 write(2, "main", 4main) = 4 write(2, ":", 1:) = 1 write(2, "545", 3545) = 3 write(2, ": ", 2: ) = 2 getuid32() = 0 geteuid32() = 0 getgid32() = 0 getegid32() = 0 write(2, "audio open error: ", 18audio open error: ) = 18 write(2, "Operation not permitted", 23Operation not permitted) = 23 write(2, "\n", 1 ) = 1 exit(1) = ? Process 1190 detached
I don't know what is SYS_xxx but EFBIG (File too large) seems to refer that something is too big to be opened?
When I check ulimit I get this:
# ulimit -a time(seconds) unlimited file(blocks) unlimited data(kbytes) unlimited stack(kbytes) 8192 coredump(blocks) 0 memory(kbytes) unlimited locked memory(kbytes) 32 process 512 nofiles 1024 vmemory(kbytes) unlimited locks unlimited
I think all it's ok about that and since it's the same file I want to play with -D plug:dmix ...
Humm I will check with ALSA installation issues...
Must I create a .conf file for my tlv320aic23b codec or it's ok if I don't have one?
On Sat, Aug 16, 2008 at 07:17:19PM +0000, Simon Tremblay wrote:
Must I create a .conf file for my tlv320aic23b codec or it's ok if I don't have one?
You shouldn't need a specific configuration file for your card but you will need the standard ALSA configuration files there.
participants (2)
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Mark Brown -
Simon Tremblay