[Bug 97590] Fury X (Fiji) LEDs do not reflect GPU load

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=97590

--- Comment #9 from Adam Bolte <abolte@systemsaviour.com> ---
I'm very excited to say that this patch is working great. Huge thanks! I know
it's crazy but there's something very satisfying about having the LEDs show
what the cards are doing. :)

I noticed attachment 129828 applies cleanly to 4.10 so I ended up using that. I
tried to test attachment 129851 but wasn't sure which repo/branch I was
supposed to apply it to. I tried
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git (master
branch) and git://people.freedesktop.org/~airlied/linux (drm-next branch) but
I'm clearly looking in the wrong place. Happy to re-test if you point me in the
right direction of the correct kernel source code to use.

Many games were tested (including a number under Wine with Gallium on Nine and
d3d9 patches). I only tested this against the free software stack so far. I
tested the Talos Principle (to test Vulkan), a bunch of Feral ports, etc. At
all times the first Fury X LEDs on the primary card would flicker in the same
way as they do under Windows, which is terrific.

The only difference between this patch and the Windows behaviour is with the
second card at idle - Windows will display only a single green LED which I
believe indicates the card is in its lowest power mode. I was unable to
reproduce that same status with your patch. However I'm guessing this means
Windows puts the unused card in to a lower power state than AMDGPU is currently
able, and the LEDs are actually doing the right thing. No big deal either way.

Thanks again Alex.

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