VegaM support

[Alex Deucher]

VegaM is a new GPU. Please include support for VegaM in the next LTS (16.04.x and 18.04.x) and non-LTS releases.

Kernel support starts here (32 patches):
https://patchwork.freedesktop.org/patch/218839/

Mesa support:
https://cgit.freedesktop.org/mesa/mesa/commit/?id=d6a66bc8dbcdeed8e87f649bc281de0d60d2f123
https://cgit.freedesktop.org/mesa/mesa/commit/?id=c6f1d360198c52d208645c0ccb5e988cded408e8
https://cgit.freedesktop.org/mesa/mesa/commit/?id=90de03708fa269ad54de881b467f4811e4eef87e

[Timo Aaltonen (tjaalton)]

kernel support is in 4.18, not sure if cosmic will get that, otherwise these should be backported there too

mesa changes are in 18.1

[Timo Aaltonen (tjaalton)]

artful is soon EOL, so not adding this there

[Martin Wimpress  (flexiondotorg)]

RX VegaM works for me with Mesa 18.1.1 or newer, providing I have Linux 4.18 and the firmware blobs from AMD.

Currently using the Intel Hades Canyon NUC running Ubuntu MATE 18.04 with the above installed.

[Timo Aaltonen (tjaalton)]

cosmic has 4.18 already

[Timo Aaltonen (tjaalton)]

I think we'll just fix this in bionic via the HWE stack update. Backport to xenial would basically mean updating stock bionic kernel/mesa and then backport those to xenial. A big patchset to the kernel is unlikely to get approved..

[Timo Aaltonen (tjaalton)]

mesa 18.2.x is in bionic-proposed

[Chih-Hsyuan Ho (chih)]

@Timo,agreed. And we are not seeing any business need to support VegaM in Xenial in near future (if ever.)

[Timo Aaltonen (tjaalton)]

bionic has 18.2.2 now

[Timo Aaltonen (tjaalton)]

bionic has 4.18 backport now, installed with 18.04.2 image or manually via 'linux-generic-hwe-18.04'