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sound(4): Implement playback and recording mode sysctl(8).

Description

sound(4): Implement playback and recording mode sysctl(8).

The dev.pcm.<N>.mode sysctl(8) gives information if a sound device
supports hardware mixing, playback or recording.

Submitted by: Christos Margiolis <christos@freebsd.org>
Differential Revision: https://reviews.freebsd.org/D31320
MFC after: 1 week
Sponsored by: NVIDIA Networking

(cherry picked from commit ed2196e5df0c8b5b81563d2fffdcb32bb7ebe966)

Details

Provenance
hselaskyAuthored on Jul 28 2021, 11:22 AM
Differential Revision
D31320: sound(4): implement playback/recording mode sysctl
Parents
rG66e91a9ee19f: Implement the SOUND_MIXER_WRITE_MUTE and SOUND_MIXER_READ_MUTE ioctl(9)s.
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