search

pimoroni / hyperpixel4

Driver for the Pimoroni HyperPixel 4.0" Touchscreen Display
https://shop.pimoroni.com/products/hyperpixel-4?variant=12569485443155
328 stars 45 forks source link

Hyperpixel and GPU Acceleration #156

Closed baesek closed 2 years ago

baesek commented 2 years ago

Hi there, I am using a Pi Zero 2W With raspbian-buster-lite 32bit running a chromium kiosk on a Hyperpixel 4.0 without Touch screen. As I am running a animation on it, I am wondering if I can somehow make use of the GPU Acceleration to improve Performance. When I go to the raspi-config and enable the fake KMS or full KMS driver the Hyperpixel stays black on next boot.

Is there no way to use the fake KMS driver to also support OpenGL based Applications ?

Thank you for any info on that.

-baesek

Gadgetoid commented 2 years ago

This worked on Pi 4, meaning something has changed on the Pi Zero W2 to break it.

Full KMS support via Raspbian Bullseye is a work in progress and will be the one true way to do OpenGL over a DPI display on the Pi afaik. Unfortunately we have been at the whim of whatever contrived stop-gap solution the Pi has used for video prior to the full KMS support, so everything is a hot mess right now.

See: https://github.com/pimoroni/hyperpixel4/issues/155

Actually the full KMS very alpha solution mentioned in the issue above (https://github.com/pimoroni/hyperpixel4/issues/155#issuecomment-966455983) might work for Bullseye on the Zero 2W. I don't know! This stuff has blindsided me.

baesek commented 2 years ago

Thank you for your response! So I will try out bullseye. But As it is in "alpha" state, I am afraid that there might be complicated problems popping up when i put this into my small unattended product. Do I understand this right, that with buster it is not possible to use any hardware acceleration at the moment? (Sorry I am having problems understanding technical descriptions in english sometimes, because it is not my native language)

I just reread to understand, so the full kms driver worked on buster already on rasbperry pi 4 ? (What about raspberry pi 3 as this is so similar to the pi zero 2w? ). So if it should work on buster 32bit on raspberry pies. than it is a compatibility issue with the zero2 ? Shall I try to install bullseye on the zero2 and than somehow try to install git clone https://github.com/pimoroni/hyperpixel4 -b pi4-kms-dpi cd hyperpixel4 sudo ./install.sh ?

Gadgetoid commented 2 years ago

I think to put it simply, the only thing I know is that: I don't know.

I'm still going through the process of trying to find answers to these problems.

baesek commented 2 years ago

Okay, I will post here, if It worked on zero 2

Gadgetoid commented 2 years ago

Would appreciate you giving the latest and greatest a try and feeding back. See: https://github.com/pimoroni/hyperpixel4/issues/177