@Jernej Škrabec @Maxime Ripard Thanks for your time and valuable suggestions. Currently I would have to go away from mainline KMS to solve my (Android) issues, and I hope to get back when I find mainline-friendly solution for it. Having no primary layer or zero-buffer primary layer and 4 overlays could be a universal solution, but I have not sufficient knowledge in KMS to bring-up this idea. On Fri, Sep 20, 2019 at 9:18 AM Maxime Ripard <mripard@xxxxxxxxxx> wrote: > > Hi, > > On Thu, Sep 19, 2019 at 11:03:26PM +0300, Roman Stratiienko wrote: > > Actually, I beleive this is True solution, and current one is wrong. Let > > me explain why. > > > > De2. 0 was designed to match Android hwcomposer hal requirements IMO. > > You can easily agree with this conclusion by comparing Composer HAL and > > De2. 0 hardware manuals. > > > > I faced at least 4 issues when try to run Android using the mainline kernel > > sun8i mixer implementation. Current one, missing pixel formats (my previous > > patch), missing plane alpha and rotation properties. I plan to fix it and > > also send appropriate solution to the upstream. > > > > To achieve optimal UI performance Android requires at least 4 ui layers to > > make screen composition. Current patch enables 4th plane usable. > > Note that you can also get 4 UI planes by enabling more than one UI > layer per channel. You wouldn't be able to use alpha between each > plane of a given channel, but we can use a similar trick than what we > did for the pipes in the sun4i backend. > > Maxime -- Best regards, Roman Stratiienko Global Logic Inc. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
