Hi,
I have a problem with my recording driver.
I have set up a pcm_hardware structure in which I define the format
supported by my hardware:
static struct snd_pcm_hardware snd_at91_ac97_capture_hw = {
.info = (SNDRV_PCM_INFO_INTERLEAVED
| SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_MMAP_VALID
| SNDRV_PCM_INFO_BLOCK_TRANSFER),
.formats = (SNDRV_PCM_FMTBIT_S16_LE
| SNDRV_PCM_FMTBIT_S16_BE
| SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_U20_3LE
| SNDRV_PCM_FMTBIT_S20_3BE
| SNDRV_PCM_FMTBIT_U20_3BE
| SNDRV_PCM_FMTBIT_S18_3LE
| SNDRV_PCM_FMTBIT_U18_3LE
| SNDRV_PCM_FMTBIT_S18_3BE
| SNDRV_PCM_FMTBIT_U18_3BE),
.rates = SNDRV_PCM_RATE_CONTINUOUS,
.rate_min = 8000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 256*1024,
.period_bytes_min = 1024,
.period_bytes_max = 4*1024,
.periods_min = 1,
.periods_max = 64,
};
Then in my open function I pass it to the runtime struct.
Nevertheless if I try to run arecord with this option: arecord -d 1
test.wav, I will have a kernel oops.
The default format is U8, but it is not supported by my Hardware, abd it
is not defined in my structure, so I though that it should exit arecord
but not crash.
Do I miss something when defining my pcm_hardware strucutre, or do I
forgot to use a specific function which should return me an error?
I have try to set up some constraints as well(for the rate and the
format), but still I have the same crash.
Regards,
Sedji
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