Hi
The hardware I am working on expects 8K bytes to be DMAed before
giving an interrupt. Only after a block of 8K bytes is DMAed, I get an
end of the block interrupt and I enqueue next 8K bytes for processing.
The params look like these:
static snd_pcm_hardware_t snd_omap_alsa_playback = {
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_MMAP),
.formats = (SNDRV_PCM_FMTBIT_S16_LE),
.rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 ),
.rate_min = 44100,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 8192*8,
.period_bytes_min = 32,
.period_bytes_max = 8 * 1024,
.periods_min = 2, //ping pong buffer
.periods_max = 128,
.fifo_size = 0,
};
I just copied it from another driver ;-). But now I am getting an
input/output error after
first block of data i.e. 8K bytes are DMAed. Does it have anything to
do with the above struct? I have discussed this earlier too, but now
attacking it once again after long gap.
-pharaoh.
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