Takashi Iwai wrote:
> At Sun, 09 Mar 2008 23:56:01 +0100,
> Pavel Hofman wrote:
>> Hi,
>>
>> I have most of the ESI Juli driver working, but I have hit a problem
>> with the capture stream. I had to modify some ice1724.c code to allow
>> redefining clock-related functions in the actual card file (Juli has a
>> different clocking scheme), but all the DMA code is left intact, as well
>> as the methods defining the capture stream.
>>
>> The ice1724 vu-meters detect input ADC data, I can hear correct sound
>> when setting the internal mixer to H/W-In. Yet, when trying to record, I get
>>
>> arecord -v -D hw:0,0,0 -r 44100 -f S32_LE -c2
>>
>> ....
>> RIFF$WAVEfmt ... data arecord: pcm_read:1346: read error: File
>> descriptor in bad state
>
> It's -EBADFD and indicates that the PCM state isn't the expected one,
> in this case, SNDRV_PCM_STATE_PREPARED or RUNNING.
> The error comes from snd_pcm_capture_ioctl1() in core/pcm_native.c.
> Not sure what is broken, but this should be the starting point.
>
>
> Takashi
Takashi,
Thanks for the hint. I have found the following:
For the working capture (spdif input in my case), the function
snd_pcm_lib_read1 gets called first with SNDRV_PCM_STATE_PREPARED, and
consequently repeatedly with SNDRV_PCM_STATE_RUNNING.
strace arecord :
...
write(1, "data\0\0\0\200", 8data) = 8
ioctl(4, 0x800c4151, 0xbfbf5310) = 0
write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
16384) = 16384
ioctl(4, 0x800c4151, 0xbfbf5310) = 0
write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
16384) = 16384
...
Whereas for the broken analog input, the sequence is
1. snd_pcm_lib_read1 with SNDRV_PCM_STATE_PREPARED - returns 0
2. snd_pcm_lib_read1 with SNDRV_PCM_STATE_SETUP - returns -EBADFD
strace arecord:
write(1, "data\0\0\0\200", 8data) = 8
ioctl(4, 0x800c4151, 0xbfa6cff0) = 0
poll([{fd=4, events=POLLIN|POLLERR|POLLNVAL, revents=POLLIN|POLLERR}],
1, 1000) = 1
ioctl(4, 0x800c4151, 0xbfa6cff0) = -1 EBADFD (File descriptor in
bad state)
write(2, "arecord: pcm_read:1346: ", 24arecord: pcm_read:1346: ) = 24
The broken input falls to polling - is it somehow blocked?
Thanks a lot for further hints.
Pavel.
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