According to the spec, PresentOptionAsync should only
trigger a different behaviour when the target msc has been reached.
In this case if the driver is able to do async swaps, we use
them to avoid a screen copy.
When the target msc hasn't been reached yet, we want to use sync swaps.
v2: Fix indentation and simplify checks for Async flips
Signed-off-by: Axel Davy <axel.davy@ens.fr>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
2203735887