Hi
On 12/23/2016 11:21 AM, Peter Ujfalusi wrote:
> The RESET register only have one self clearing bit and it should not be
> cached. If it is cached, when we sync the registers back to the chip we
> will initiate a software reset as well, which is not desirable.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
> ---
> sound/soc/codecs/tlv320aic3x.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
> index 216f74084c6a..7b6924e19021 100644
> --- a/sound/soc/codecs/tlv320aic3x.c
> +++ b/sound/soc/codecs/tlv320aic3x.c
> @@ -126,6 +126,16 @@ static const struct reg_default aic3x_reg[] = {
> { 108, 0x00 }, { 109, 0x00 },
> };
>
> +static bool aic3x_volatile_reg(struct device *dev, unsigned int reg)
> +{
> + switch (reg) {
> + case AIC3X_RESET:
> + return true;
> + default:
> + return false;
> + }
> +}
> +
You mentioned offline you tracked this into my commit 9fb352b18b11
("ASoC: tlv320aic3x: Do soft reset to codec when going to bias off
state") but was it by bisecting or by debugging? I think I tried to
cover it in a commit before 508b76864c18 ("ASoC: tlv320aic3x: Don't sync
first two registers from register cache").
If you found it by debugging can it be that pop noise came because of
2a6fedec195b ("ASoC: tlv320aic3x: Convert to direct regmap API usage")?
Just thinking if there's a need to have this into stable.
Reviewed-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxx>
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