FirePro M5100 Support in drm-next-kmod?

[Jacob Meadows]

I am testing FreeBSD on a Dell Latitude M4800 with an AMD FirePro M5100 mxm video card.  On a clean install, I install drm-next-kmod from ports, then add kld_list="amdgpu" to the /etc/rc.conf.  On reboot, the system freezes during the driver loading, and I have to physically power off the system and boot into single user mode to disable the driver and recover.

I have tried this in 11.2 and 12.0 Beta1.  I have tried drm-stable-kmod as well.  I have tried this in both UEFI and legacy boot modes, but it happens the same each time.  If I load the i915 driver, that loads without issue.

I run "pciconf –lv | grep display –B 3 –A" and get the following result:

Vgapci1 at pci0:0:2:0:	Class=0x030000 card=0x05cc1028 chip=0x04168086 rev=0x06 hdr=0x00
	Vendor	= ‘Intel Corporation’
	Device	= ‘4th Gen Core Processor Integrated Graphics Controller’
	Class	= display
	Subclass = VGA
--
Vgapci0 at pci0:1:0:0:	class-0x030000 card=0x05cc1028 chip=0x68211002 rev=0x00 hdr=0x00
	Vendor	= ‘Advanced Micro Devices, Inc. [AMD/ATI]’
	Device	= ‘Venus XT [Radeon HD 8870M / R9 M270X/M370X]’
	Class	= display
	Subclass	= VGA


I do see an error during boot, but otherwise seems to be ok:
Radeon/verde_me.bin: could not load firmware image, error 2
Radeon/verde_me.bin: could not load firmware image, error 2
Radeon/verde_ce.bin: could not load firmware image, error 2
Radeon/verde_ce.bin: could not load firmware image, error 2
Radeon/verde_rlc.bin: could not load firmware image, error 2
Radeon/verde_rlc.bin: could not load firmware image, error 2

My question is this:  Is this particular card unsupported, or is there something I am missing?