xorg 1.20 released, to build for AMD use kernel from here ~agd5f/linux - Unnamed repository; edit this file 'description' to name the repository.
also for vegam you need to add firmwares from here
Index of /~agd5f/radeon_ucode/vegam
PS. don't forget In kernel config turn on DCN, DC, for AMD and vegaM have separate option for turn ON
and best use LE9 source for testing this, there is more changes for radeonsi - to use VAAPI
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