Could you please detail your question? What example, in particular, are you referring to? The official is to ask Vivante for these materials like Vivante OpenVG API, source code, etc.
@linhaha You have to use FreeRTOS OS. The source code of EGL isn't available. You still can use the other display panel. To use new display, you need to modify the display_support.c and .h files for new display panel.