[alsa-devel] [PATCH] ASoC: Intel: boards: Use FS as nau8825 sysclk in nau88l25_max98357a machine

Mark Brown broonie at kernel.org
Fri Nov 18 11:38:55 CET 2016


On Fri, Nov 18, 2016 at 01:47:12PM +0800, Grace Kao wrote:
> 256FS sysclk gives the best audio quality per nau8825 datasheet.
> 
> Loud headphone pop happens if there is no sysclk during nau8825
> playback power up sequence. Currently Skylake does not output MCLK/FS
> when the back-end DAI op hw_param is called, so we cannot switch to
> MCLK/FS in hw_param. This patch reduces pop by leting nau8825 keep
> using its internal VCO clock during widget power up sequence, until
> SNDRV_PCM_TRIGGER_START when MCLK/FS is available.
> 
> ---
> 
> diff --git a/sound/soc/intel/boards/skl_nau88l25_max98357a.c b/sound/soc/intel/boards/skl_nau88l25_max98357a.c

I can't do anything with this without a Signed-off-by, please see
Documentation/SubmittingPatches for an explanation of what this means.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 455 bytes
Desc: not available
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20161118/3bf41f7c/attachment-0001.sig>


More information about the Alsa-devel mailing list