AMD has been working hard for quite some time now on its open source Linux drivers, ensuring the proper code is there when products launch, but as it is open source, the patches are visible to the public. Recently some 42 patches, totaling sixty thousands lines of kernel code, appeared within the AMD GPU Direct Rendering Manager (DRM) kernel driver, bringing initial support for Vega 12. A lot of the code is auto-generated header files and even the new code is largely copied from that for Vega 10 and the Raven Ridge APUs, but it is still there so it appears Vega 12 is coming.
Exactly what this GPU is can only be guessed at currently, but it being the previously seen and announced discrete mobile version of the architecture would make sense. The code does have five PCI IDs in it, but this does not mean there will be five SKUs of the GPU as manufacturers often reserve more of these than they need. This covers the potential release of additional SKUs in the future as well as engineering variants that never come to consumers.
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