On Mon, 14 Sep 2020 08:51:18 +0200, Hui Wang wrote: > > We found a Mic detection issue on many Lenovo laptops, those laptops > belong to differnt models and they have different audio design like > internal mic connects to the codec or PCH, they all have this problem, > the problem is if plugging a headset before powerup/reboot the > machine, after booting up, the headphone could be detected but Mic > couldn't. If we plug out and plug in the headset, both headphone and > Mic could be detected then. > > Through debugging we found the codec on those laptops are same, it is > alc257, and if we don't disable the 3k pulldown in alc256_shutup(), > the issue will be fixed. So far there is no pop noise or power > consumption regression on those laptops after this change. > > Cc: Kailang Yang <kailang@xxxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx> Applied now. Thanks. Takashi
