Installed a package from a PPA won't break the package upgrade.
As Timo uploads the package to Unstable.
If everything goes smoothly, the next version of xserver-xorg-video-amdgpu will contain the patches and that version will overwrite mine from the PPA.
In short, an "apt upgrade" will overwrite it and point to current version from ubuntu-archive.
Installed a package from a PPA won't break the package upgrade.
As Timo uploads the package to Unstable. xorg-video- amdgpu will contain the patches and that version will overwrite mine from the PPA.
If everything goes smoothly, the next version of xserver-
In short, an "apt upgrade" will overwrite it and point to current version from ubuntu-archive.