linux-kernel - Re: [PATCH v3] ASoC: fsl-asoc-card: Remove fsl_asoc_card_set_bias

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Date:   Sun, 2 Aug 2020 20:12:07 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Shengjiu Wang <shengjiu.wang@....com>
Cc:     timur@...nel.org, Xiubo.Lee@...il.com, festevam@...il.com,
        lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, alsa-devel@...a-project.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] ASoC: fsl-asoc-card: Remove
 fsl_asoc_card_set_bias_level function

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 <shengjiu.wang@....com>

Acked-by: Nicolin Chen <nicoleotsuka@...il.com>