Have a Hyperpixel 2.1 round connected to a RPI Zero W runny Bullseye. Running Ardum version of the RPI HQ camera displaying directly to the Hyperpixel display. When connected to a HDMI monitor, code runs perfectly but when connected to the Hyperpixel display I get an error V4L2 “unable to allocate memory”. If I reduce the camera image resolution down below 1280x1280 it will run when using the Hyperpixel display. When connected thru HDMI monitor can set camera image resolution to max of 4056x3040. Picamara2 configuration set for “still” with buffer count set to 2. Setting buffer count to 1 gives same error. Since the hyperpixel display is 480x480 I can’t imagine its using up all the RAM?