https://wiki.archlinux.org/index.php/Vulkan
AMD: vulkan-radeon (radeon, AMDGPU [3]) or amdgpu-pro-vulkanAUR (AMDGPU PRO) or amdvlk-gitAUR
AUR:
$ yaourtix vulkan amd
1 aur/amdapp-codexl 2.6.302-2 (34) (0.77)
AMD CodeXL is an OpenCL, Vulkan and OpenGL Debugger and Profiler, with static OpenCL kernel analyzer.
It supports OpenCL 2.0
2 aur/amdgpu-pro-vulkan 17.40.492261-2 (Out of Date) (73) (2.31)
The AMDGPU Pro Vulkan driver
3 aur/amdvlk-deb 2019.Q2.2-1 (0) (0.00)
AMD Open Source Driver for Vulkan (Stable DEB Release)
4 aur/amdvlk-git r43.6d9d93a-1 (24) (0.99)
AMDs standalone Vulkan driver
5 aur/lib32-amdgpu-pro-vulkan 17.40.492261-2 (Out of Date) (73) (2.31)
The AMDGPU Pro Vulkan driver (32bit libraries)
6 aur/lib32-amdvlk-git r38.d88feee-1 (3) (0.07)
AMDs standalone Vulkan driver (32-bit)
7 aur/lunarg-vulkan-sdk 1.0.3.1-1 (Out of Date) (3) (0.00)
Vulkan loader for amdgpu-pro (It sucks, but you have to download it yourself and put it in the same
directory as your PKGBUILD, see url), make sure you don't have dpkg installed