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

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Date:   Wed, 9 Aug 2017 19:36:20 +0200
From:   "Axel Rohde" <dr.a.rohde@....de>
To:     stable@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: AMD Polaris 12 / RX 5xx support for Linux 4.9.x

Hi Kernel Maintainers,

I'm using Debian 9 ("Stretch", has just become stable) with Kernel 4.9.30.

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.

Unfortunately 4.9.30 did NOT support AMD Radeon RX 550 (Polaris 12).
I had to use kernel 4.11.

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?

"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.

Best regards,
   Axel Rohde