From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: SOUND <alsa-devel@alsa-project.org>
Subject: How to annotate USB jacks without jack detection?
Date: Fri, 11 Dec 2020 15:14:24 +0800 [thread overview]
Message-ID: <0SY5LQ.NPOPM8PL9XNK1@canonical.com> (raw)
Hi,
There are some UAC1 devices come with jacks, but without jack detection
ability. And many USB/Thunderbolt docks are equipped with such USB
device.
Userspace like PulseAudio automatically switch to USB audio when they
gets plugged. However, auto-switching to UAC1 device can be problematic
because it may not connected to any headset or speaker.
So I wonder what's the best way to let userspace know the USB device is
a jack without jack detection ability? Through sysfs or dedicated UCM
conf?
Kai-Heng
next reply other threads:[~2020-12-11 7:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-11 7:14 Kai-Heng Feng [this message]
2020-12-11 9:06 ` How to annotate USB jacks without jack detection? Takashi Iwai
2020-12-11 12:31 ` Kai-Heng Feng
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