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    SubjectRe: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8
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    On 28/07/17 15:01, Mark Brown wrote:
    > On Fri, Jul 28, 2017 at 02:54:59PM +0100, Srinivas Kandagatla wrote:
    >> On 28/07/17 14:40, Mark Brown wrote:
    >>> On Wed, Jul 26, 2017 at 02:35:10AM +0200, srinivas.kandagatla@linaro.org wrote:
    >>>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    >
    >>>> This patch sets the default internal micbias voltage to 1.8v. This
    >>>> default value is required for mbhc buttons to work. Also adds dt
    >>>> bindings to allow the board level file to specify the required default
    >>>> micbias value.
    >
    >>> What was the default previously?
    >
    >> This was set to 2.7v previously for special headsets which have high
    >> impedance.
    >
    > So obviously this will break existing users. That's not OK.

    This would not break any exiting users, as this part is applicable for
    only headset detect usecase. I will try to address this in ("PATCH 5/6
    ASoC: codecs: msm8916-wcd-analog: add MBHC support") patch.

    The default voltage for most common usecase should be set to 1.8v anyway.




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