[linuxkerneldev]

> we rolled our own FPGA based driver and were able to get small region update down to about 20ms.

That is very impressive. 20ms latency from the time a pen hits the display to the point that a pixel is drawn on an EPD is twice as fast as an iPad Pro is able to do it on an LCD! Any links to your project?

[bravo22]

This wasn't pen to screen update. The driver was only for screen update. It wasn't an open source project. It was work-for-hire.