AMD Polaris 12 / RX 5xx support for Linux 4.9.x

[Axel Rohde]

Hi Kernel Maintainers,
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I'm using Debian 9 ("Stretch", has just become stable) with Kernel 4.9.30.
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Recently I added a AMD Radeon RX 550 (Polaris 12) graphics board to my system to connect an
Ultra HD Monitor using Display Port 1.2, which the Intel Ivy Bridge core i5 lacks.
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Unfortunately 4.9.30 did NOT support AMD Radeon RX 550 (Polaris 12).
I had to use kernel 4.11.
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Are you planning to backport support for AMDGPU Polaris 12 (AMD Radeon RX 5xx Series graphics boards)
from 4.11 or later back to 4.9?
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"Other things" include Mesa, Firmware, libdrm, xf86-video-amdgpu, which aren't a big deal to compile.
The kernel, however, takes 30min+ and the next lonterm kernel might not be too compatible to Debian 9.
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Best regards,
ÂÂ Axel Rohde
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