but that should be
MODULES=(nvidia nvidia_modeset nvidia_uvm nvidia_drm)
inside the /etc/mkinitcpio.conf if you want to enable early kms, then you have to run
sudo mkinitcpio -P
sudo update-grub
But then, if you want for later to test wayland (not worth tho), then you add to /etc/default/grub on the cmd line to be like that
GRUB_CMDLINE_LINUX="nvidia-drm.modeset=1"
then run
sudo update-grub
but, where this comes from
is something i never encountered … 