I installed a new archlinux on my pi4 per the instructions on the installation page at https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-4
At the bottom of the page, on the option to install 64 bit, it states "This installation has near full support for the device, including the VC4 graphics."
I took that to mean that it has support for the VC4 graphics, and that helps make near full support for the device. Perhaps I misread it and it is meant to mean the VC4 support is nearly full, but isn't. If it doesn't work, please let me know. However, if it does, I can't figure out how to get there.
On other installations onto the pi4, including previous archlinux installations I've put on there, enabling the driver involves putting a line into the config.txt file in the /boot folder where there are a few variations to the line whether trying to use kms, a fkms, or a version specifically for the pi4. I've tried them and nothing seems to get the driver up and going. Startx consistently fails with no screens found. /dev/dri does not exist and I believe it should exist with files in it related to the graphics device. If there is another way to get this going on this ARM installation of archlinux, I can't find it. If the old way is still the right way, I'm perplexed as to why it isn't working. I would really appreciate some help to point me in the right direction.