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uaudio: add sysctl hw.usb.uaudio.handle_hid to allow disabling HID volume keys support
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Authored by val_packett.cool on Nov 11 2020, 5:55 PM.
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Summary

The new iichid input stack can handle the volume keys on audio devices, which is preferred when something in the desktop environment reacts to them :) so it should be possible to disable uaudio's built-in handling.

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rS FreeBSD src repository - subversion
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sys/dev/sound/usb/uaudio.c
105 ↗(On Diff #79436)

You nee "| CTLFLAG_MPSAFE" here. You can also set the constant argument "1, " to zero. It is only used for read-only sysctls I believe.

sys/dev/sound/usb/uaudio.c
105 ↗(On Diff #79436)

sysctl(9) says about MPSAFE:

This should only be used for SYSCTL_PROC() entries

Is it wrong?

The new iichid input stack can handle the volume keys on audio devices, which is preferred when something in the desktop environment reacts to them :) so it should be possible to disable uaudio's built-in handling.

+1. Userland volume control is more flexible and allows some fancy stuff like onscreen volume change notification

This revision is now accepted and ready to land.Nov 12 2020, 12:02 AM