> On 10/6/19, 7:04 AM, Pavel Machek wrote: > > Hi! > > > > >> 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 > > > > > > Oh, I didn't realize it got merged already, I thought this was > > > related... > > > > > > So we've already replicated the backlight sysfs interface problem for > > > privacy screens. :( > > > > I guess... although the Thinkpad code hasn't added any standard > > interfaces (no other laptop should be placing controls for a privacy > > screen in /proc/acpi/ibm/... ). Maybe its not too late. > > There's new interface for controlling privacyguard... but perhaps we > need better solution than what went in 5.4. Perhaps it should be > reconsidered? I agree with your opinion. I also think that better solution can be considered, although there is already something in 5.4. Best regards, Jingoo Han > > Best regards, > Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
