I’m using the gorgeous Pimoroni Hyperpixel 4.0 on a Raspberry Pi 4 for a small project. The display is crazy beautiful, and comes in a touch and non-touch version.
I ran into issues getting touch working, and opened an issue. After a little poking and a helpful commenter pointing me to related issues, I found a workaround
For posterity, I followed the directions above (running Pimoroni’s install script, choosing option 2 for Rectangular with Experimental Pi 4 Touch Fix, then edited /boot/config.txt as follows. Modified lines commented as such.
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
#dtoverlay=vc4-fkms-v3d # Modified
max_framebuffers=2
[all]
#dtoverlay=vc4-fkms-v3d
dtoverlay=hyperpixel4
gpio=0-25=a2
enable_dpi_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x7f216
dpi_timings=480 0 10 16 59 800 0 15 113 15 0 0 0 60 0 32000000 6
display_rotate=1 # Modified
Very pleased with this, though I’ve heard it won’t work with low-level access (ie. RetroPie setups). YMMV.