New sysfs interface for privacy screens

[Jonathan Corbet]

On Tue, 1 Oct 2019 10:09:46 -0600
Mat King <mathewk at google.com> wrote:

> I have been looking into adding Linux support for electronic privacy
> screens which is a feature on some new laptops which is built into the
> display and allows users to turn it on instead of needing to use a
> physical privacy filter. In discussions with my colleagues the idea of
> using either /sys/class/backlight or /sys/class/leds but this new
> feature does not seem to quite fit into either of those classes.

FWIW, it seems that you're not alone in this; 5.4 got some support for
such screens if I understand things correctly:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=110ea1d833ad

jon