issues loading firmware and missing pci card

[rich0]

I just got my rockpro64 2gb (board rev 2.1), and while it boots up fine, it isn't detecting my LSI HBA PCIe card.

lspci just gives no output at all, so I don't think it is simply a missing kernel module.

I'm using the debian stretch image off of the wiki.

I'm also getting errors in dmesg that may or may not be relevant:
[    8.566853] cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2
[   16.581959] cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2
[   32.584126] cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2
[   64.586143] cdn-dp fec00000.dp: Direct firmware load for rockchip/dptx.bin failed with error -2
[  128.588049] cdn-dp fec00000.dp: [drm:cdn_dp_request_firmware] *ERROR* Timed out trying to load firmware

I did do an apt-get update/upgrade and rebooted, and the issue persists.  uname -a output:
Linux chunk1 4.4.132-1075-rockchip-ayufan-ga83beded8524 #1 SMP Thu Jul 26 08:22:22 UTC 2018 aarch64 GNU/Linux

That kernel doesn't look terribly fresh...

I'll also go ahead and confess that while I'm quite comfortable with linux inside and out, I rarely use debian-based distros, so please do list complete instructions (typically I use Gentoo) or provide links if you want me to do something like run a custom kernel.  

Any suggestions?