linux-kernel - ALSA for SoC audio support full duplex problem

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Date:	Tue, 12 May 2009 17:04:07 +0800
From:	jinjin xu <freebsdxjj@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: ALSA for SoC audio support full duplex problem

I use 2.6.21.5-cfs-v19 on S3C6410(arm),use wm8987 sound card(i2s interface)

It is not work correct  in full duplex.
I grep and diff the drivers

ens1370.c:

  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ensoniq_playback1_ops);

  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ensoniq_capture_ops);


soc-core.c:

        if (playback)
        {

                snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);

        }

        if (capture)
        {

                snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
        }


ens1370.c use two different fops for playback and record(I test it in
Vmware,It can run on full duplex)
soc-core.c use the same fops for  playback and record

It that the problem ?
So how to fix it for support full duplex?

Thanks!
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