Fix refresh rate on sony-amami

See https://github.com/postmarketOS/pmbootstrap/wiki/sony-amami-(Xperia-Z1-Compact)#issues

Makes weston fall back to default refresh rate (60 Hz).

I know this is an awful hack, but I don't think this kernel/driver worth the time debugging, since the panel driver could easily be ported to mainline based on robclark's work.

Hmm interesting, the mdss video driver for the hammerhead has the same line in it (and also has refresh rate issues)

By Martijn Braam on 2017-08-08T10:03:44

Created by: ollieparanoid

I think it is highly possible, that this hack will only work with weston. Because weston falls back to 60 Hz when the driver says, that it has less than 1 Hz. I do not think, that other wayland compositors will act the same way.

How about directly forcing 60 Hz instead? According to framebuffer.txt, the value would be specified in pico seconds. So as I understand it, the correct value would be 1000000 / 60 (which calculates to 16667, but I would leave the / 60 in place, so it is easier to understand). Could you try that?

It is super useful, that you found the place in the code where we actually can fix/workaround this issue, thanks a lot!

Regarding issue #349 (closed): Travis should run through as soon as you rebase your code on master. Sorry for that!

By * postmarketOS Bot on 2017-08-08T13:09:22

@ollieparanoid Thanks for doing the math! It works as expected.

By Attila Szollosi on 2017-08-08T16:44:47