From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [PATCH] ALSA: hda - Apply codec delay to wallclock.
Date: Mon, 08 Apr 2013 11:31:12 -0500
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> +	if (hinfo->ops.get_delay) {
> +		codec_nsec =
> +			hinfo->ops.get_delay(hinfo, codec, substream) * 1000000;
> +		if (stream == SNDRV_PCM_STREAM_CAPTURE)
> +			nsec = (nsec > codec_nsec) ? nsec - codec_nsec : 0;
> +		else if (stream == SNDRV_PCM_STREAM_PLAYBACK)
> +			nsec += codec_nsec;

Can the .get_delay be modified to provide a better resolution than a ms? 
If you already convert to time, microseconds would seem like a better 
fit? Your codec seems to report frames (ie 20.83 us).
-Pierre