[platforms/hwcomposer] Support for hwcomposer 1.4 and 1.5 version
HWcomposer version 1.4 introduced setPowerMode, which replaces the
blank(). This adds support for it. There are various code paths
- If KWin is built against hwcomposer 1.3 headers, then setPowerMode
code is not compiled in, and it will use blank to turn display off.
- If KWin is built against hwcomposer 1.4 headers, it will have
setPowerMode code path compiled in. It will be used only on devices with
1.4 and 1.5 version of hwcomposer.
This is slightly insane, because Android can report hwcomposer 1.5 even
when headers are of 1.4 version..
Test Plan: Tested this on Nexus 5X which reports 1.5 version of hwcomposer
Reviewers: graesslin, Plasma
Reviewed By: graesslin, Plasma
Subscribers: plasma-devel, kwin
Differential Revision: https://phabricator.kde.org/D3686