Re: [PATCH v3] ASoC: fsl-asoc-card: Remove fsl_asoc_card_set_bias_level function

From: Nicolin Chen
Date: Sun Aug 02 2020 - 23:12:21 EST

On Mon, Aug 03, 2020 at 10:13:31AM +0800, Shengjiu Wang wrote:
> With this case:
> aplay -Dhw:x 16khz.wav 24khz.wav
> There is sound distortion for 24khz.wav. The reason is that setting
> PLL of WM8962 with set_bias_level function, the bias level is not
> changed when 24khz.wav is played, then the PLL won't be reset, the
> clock is not correct, so distortion happens.
> The resolution of this issue is to remove fsl_asoc_card_set_bias_level.
> Move PLL configuration to hw_params and hw_free.
> After removing fsl_asoc_card_set_bias_level, also test WM8960 case,
> it can work.
> Fixes: 708b4351f08c ("ASoC: fsl: Add Freescale Generic ASoC Sound Card with ASRC support")
> Signed-off-by: Shengjiu Wang <>

Acked-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx>