I tested couple byt-rt5640 based platforms and they have single-ended headset microphone connection to IN2P only. I guess IN2N was either defined by accident or some early platform had floating ground for headset. It's better to remove IN2N and add a custom route for such a platform if needed.
Signed-off-by: Jarkko Nikula jarkko.nikula@linux.intel.com --- sound/soc/intel/byt-rt5640.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/sound/soc/intel/byt-rt5640.c b/sound/soc/intel/byt-rt5640.c index 234a58de3c53..d6d8b19c22dc 100644 --- a/sound/soc/intel/byt-rt5640.c +++ b/sound/soc/intel/byt-rt5640.c @@ -36,7 +36,6 @@ static const struct snd_soc_dapm_widget byt_rt5640_widgets[] = { static const struct snd_soc_dapm_route byt_rt5640_audio_map[] = { {"Headset Mic", NULL, "MICBIAS1"}, {"IN2P", NULL, "Headset Mic"}, - {"IN2N", NULL, "Headset Mic"}, {"DMIC1", NULL, "Internal Mic"}, {"Headphone", NULL, "HPOL"}, {"Headphone", NULL, "HPOR"},