[Bug 262043] update of drm-*kmod breaks AMD GPU support

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 20 Feb 2022 20:16:07 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262043

Stefan Eßer <se@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Open

--- Comment #4 from Stefan Eßer <se@FreeBSD.org> ---
(In reply to Vladimir Kondratyev from comment #3)

Thank you for the patch, I have tested it with both drm-current-kmod and
drm-devel-kmod.

It did not make drm-current-kmod fail, but it did not help drm-devel-kmod.

The attach messages end thusly:

[drm] Connector 2:
[drm]   DVI-I-1
[drm]   HPD2
[drm]   DDC: 0x1958 0x1958 0x1959 0x1959 0x195a 0x195a 0x195b 0x195b
[drm]   Encoders:
[drm]     DFP3: INTERNAL_UNIPHY
[drm]     CRT1: INTERNAL_KLDSCP_DAC1
drmn0: [drm] Cannot find any crtc or sizes
drmn0: [drm] Cannot find any crtc or sizes
drmn0: [drm] Cannot find any crtc or sizes
sysctl_warn_reuse: can't re-use a leaf (hw.dri.debug)!
[drm] Initialized amdgpu 3.37.0 20150101 for drmn0 on minor 0

The sysctl re-use warning is new, but the drmn0 lines are unchanged compared to
the kernel without this patch.

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