Hi Mark, On 2016?04?18? 17:22, Mark Brown wrote: > On Mon, Apr 18, 2016 at 04:17:30PM +0800, Xing Zheng wrote: >> This patch add a callback when a codec have the jack detect feature. >> +void snd_soc_jack_codec_detect(struct snd_soc_codec *codec, >> + struct snd_soc_jack *jack) >> +{ >> + if (codec&& codec->driver&& codec->driver->detect_jack) >> + codec->driver->detect_jack(codec, jack); >> +} >> +EXPORT_SYMBOL_GPL(snd_soc_jack_codec_detect); > I've no idea what this is supposed to do sorry, you need a much better > changelog and probably also a restructuring of the code. This says it > is adding a callback but it doesn't do that, it adds an export of a > function that calls an operation in a driver with no explanation. Yes, sorry to forgot to add description for this API. 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. I will clean up the commit message. Thanks. -- - Xing Zheng