On Mon, 11 Jan 2021 14:05:56 +0100, Hui Wang wrote: > > Adding 4 more debugfs nodes, users could get more information about > the jack_kctl from them: > - kctl_id, read-only, get jack_kctl->kctl's id > sound/card0/HeadphoneJack# cat kctl_id > Headphone Jack > > - mask_bits, read-only, get jack_kctl's events mask_bits > sound/card0/HeadphoneJack# cat mask_bits > 0x0001 HEADPHONE(0x0001) > > - status, read-only, get jack_kctl's current status > headphone unplugged: > sound/card0/HeadphoneJack# cat status > 0x0000 > headphone plugged: > sound/card0/HeadphoneJack# cat status > 0x0001 HEADPHONE(0x0001) > > - type, read-only, get jack's supported events type > sound/card0/HeadphoneJack# cat type > 0x0001 HEADPHONE(0x0001) I believe we should have a proper documentation in Documentation/ to describe all those. And the debugfs callbacks could be optimized without malloc as I mentioned in another mail, too. thanks, Takashi
