Am 2017-08-29 15:28, schrieb Matthias Klumpp:
What we would be interested in is knowing about the future plans for Plasma Mobile, especially in the area of design and performance improvements. I didn't have the opportunity yet to test Plasma Mobile on one of our development boards, but I hope I can get to that soonish.
Speaking for the KWin (Wayland compositor) part. Ideal would be drm support in the phone directly, but that is probably just wishful thinking. KWin does have a working Android hwcomposer backend through libhybris. That works well and good for the limited use cases we had so far. The code base of this plugin is extremely small (< 1000 lines of code), which shows that most of the code is shared and it's relatively easy to extend and adjust this code base for new needs.
Having done the initial port of KWin to the Nexus 5 I can proudly say that KWin performs very well on such kind of hardware. We benefit a lot from performance improvements done in the general KWin stack. And we can bring improvements from other platforms also to the phone stack. For example Roman did a lot of work to get layered compositing working in the DRM platform and that would be an ideal candidate to bring also in the hwcomposer plugin. Thus we have all the heavy lifting done to do things like rendering videos directly in a hardware plane.
One of the things currently being worked on for the phone is to get rid of XWayland. This could give you a nice performance boost as you have a Wayland only system (of course it's also nice to have X support, but one cannot get it with GL support, so the gain is not worth it IMHO).
Cheers Martin
