hello ,I dont have a hyperpixel ,but have a few different lcd’s ,I’m a bit of a novice ,but when i want to do what your wanting to do i follow this site ,
Disabling vc4-fkms-v3d will probably mean that the HDMI ports will no longer work – I’ve yet to check, but as I mentioned originally I’m just wanting the console on the Hyperpixel 4.
Rather nicely, ‘startx’ brings up X properly on the Hyperpixel 4, and touch is working just fine. (I did earlier run hyperpixel-rotate when I first started on this, so that may be a necessary step for this to work.)