maintainer-feedback requested: [Bug 268962] graphics/drm-510-kmod: amdgpu.ko doesn't load properly from loader.conf

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11@FreeBSD.org> for maintainer-feedback:
Bug 268962: graphics/drm-510-kmod: amdgpu.ko doesn't load properly from
loader.conf
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268962



--- Description ---
When I include:

amdgpu_load="YES"
amdgpu_name="/boot/modules/amdgpu.ko

in my /boot/loader.conf, it loads amdgpu.ko, and also loads drm.ko,
linuxkpi_gplv2.ko, dmabuf.ko, and ttm.ko (which I hypothesize happens because
the top Makefile specifies:

DEFAULT_KMODS=	dmabuf		\
		linuxkpi	\
		ttm		\
		drm		\
		amd		\
		radeon

But in order to work, we also need firmware for my graphics card to load, which
means amdgpu_raven_{gpu_info,sdma,asd,ta,pfp,me,ce,rlc,mec,mec2,vcn}_bin.ko
also have to be loaded in my case.  And they are, if I kldload amdgpu.ko by
hand in single-user mode or include amdgpu.ko in kld_list in my /etc/rc.conf. 
(And in that case, X windows comes up nicely using the "amdgpu" driver, whereas
otherwise it comes up in VESA mode.)

In conjunction with bug #267028, it would be nice if I could load amdgpu.ko at
/boot/loader.conf time, since loading it later on increases the chance of a
kernel crash in ZFS code.  Don't ask me why.