[PATCH 1/3] ASoC: jack: Add a jack detect callback via codec

[Mark Brown]

On Mon, Apr 18, 2016 at 05:43:51PM +0800, Xing Zheng wrote:

> The patch_1/3 add an export of a function that calls the _detect_jack_
> function
> when a codec supports jack detection and fill the _detect_jack_ function in
> the
> struct snd_soc_codec_driver.

But why would anything ever call this function?  How is this supposed to
be used?
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