[alsa-devel] [PATCH 1/1] ASoC Blackfin: fix bug - Audio Latency on AD1981 with MMAP enabled

Mark Brown broonie at sirena.org.uk
Sat Sep 27 11:33:17 CEST 2008

On Sat, Sep 27, 2008 at 04:58:09PM +0800, Bryan Wu wrote:
> From: Cliff Cai <cliff.cai at analog.com>

> With MMAP enabled (DMA mode) on the AD1981, there is +/- 250ms of delay between
> writing data to alsa and audio starts coming out of the AD1981.
> Copy more data to local buffer before starting DMA

> Signed-off-by: Cliff Cai <cliff.cai at analog.com>
> Signed-off-by: Bryan Wu <cooloney at kernel.org>

Acked-by: Mark Brown <broonie at opensource.wolfsonmicro.com>


> + * 
> + * Revision history
> + *      6th June 2008 Initial version
> + *      25th Sep 2008 fix latency when enable mmap
>   */

it'd be good to drop the in-code changelogs - we're already tracking the
history of the code with git and they're likely to end up providing an
inaccurate history due to people not updating them (this applies to most
of the Blackfin code).  There were in-code changelogs in ASoC in the past
from the time it was out of tree but they shouldn't be required now.

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