[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.
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