Linux firmware is a package distributed alongside the Linux kernel that contains firmware binary blobs necessary for partial or full functionality of certain hardware devices.

Download the latest firmware from https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git.

cd /lib/firmware/
sudo mv /lib/firmware/amdgpu /lib/firmware/amdgpu_backup
sudo cp -r amdgpu /lib/firmware/

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git