[Bug 109206] Kernel 4.20 amdgpu fails to load firmware on Ryzen 2500U

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109206

--- Comment #19 from Tim Carr <tim at timcarr.me> ---
(In reply to Harry Wentland from comment #15)
> Can you see if this patch fixes it:
> https://patchwork.freedesktop.org/patch/277181/


Wasn't able to get that patch to apply cleanly to either 4.20 or 5.0rc2. I did
attempt to manually edit the function in the amdgpu_psp.c file according to the
patch, but now have in my log:

"[drm:construct [amdgpu]] *ERROR* construct: Invalid Connector ObjectID from
Adapter Service for connector index:2! type 0 expected 3" 

I'm assuming I attempted to apply the patch to the wrong revision. Behavior for
me is somewhat changed, before the patch I got about 4 lines of scrambled
pixels about 4/5ths of the way down my screen on anything above kernel 4.19,
with the patch applied to 5.0rc2 those lines appear for a couple of seconds and
then the screen goes and remains totally blank.

I can attach the full log if you want, but considering I wasn't able to
directly apply the patch and instead manually modified the "psp_cmd_submit_buf"
function to warn instead of error and not return -EINVAL as described in the
patch, I'd rather not clutter this with potentially bad log data. Should that
patch be applied to drm-next instead of what is in the mainline kernel?

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