How to add full duplex capture and playback?

[Hans-Christian Egtvedt <hcegtvedt@atmel.com>]

Hello

I'm strugling a bit with getting my AC97 driver to be full duplex. The
hardware supports it, but I can't seem to enable it correctly in the driver.

Is there anything I've missed other than this?
err = snd_pcm_new(chip->card, "Atmel AC97", 0, 1, 1, &pcm);

AFAIK this should give me two substreams, one for capture and one for
playback. Do I have to take some care with other calls?

When I try to playback and record simultaneously I get the following error:
ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable
aplay: set_params:879: Broken configuration for this PCM: no
configurations available

-- 
With kind regards,
Med vennlig hilsen,

Hans-Christian Egtvedt
Applications Engineer - AVR Applications Lab
Atmel Norway


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