The Musnap Neo 2 ships with Android 14 userspace, but its hardware boundary is an Android 12-era GKI 5.10.233 kernel with vendor policy level 31. It is also rootable out of the box and that made it an interesting AOSP target: instead of touching stock partitions, I keep the stock kernel/vendor stack and boot replacement generic-arm64
/system images as temporary DSUs.The hardware is a 6-inch 1448×1072 e‑ink panel. Its display path is not exposed through a generic Android display interface, so the project captures physical-display composition from SurfaceFlinger, converts it into the panel’s evidenced 16-level grayscale input domain, and submits an owned buffer through the device-specific vendor e‑ink engine.
That proprietary lower layer still handles panel conversion, waveform selection, and panel transport. It is the reason this is an integration project rather than “flash a GSI and call it done.”
Across the tested AOSP branches: Android 14, Android 15, Android 16, and Android 17 / API 37, the same presentation path has worked: SurfaceFlinger composition reaches the vendor e‑ink engine, Android UI is visible and usable on the physical panel, and repeated refreshes are accepted without recorded lower-engine rejections in the tested diagnostics.
The frontlight path is also working at a narrow, testable level: calibrated cool-only and warm-only midpoint requests, plus explicit zero/off, completed without Android-side write failure. There is persistence and sleep/wake replay now, and lift cover to wake works, but I haven't integrated it with the native brightness control yet instead I have a simple controller apk with some config settings right now.
I can’t distribute a flashable image because it needs proprietary libraries, waveform resources, and calibration data though. The AOSP-side code and build logic are publishable; the device-specific runtime pieces have to come from the owner’s own stock firmware. Not sure if there is interest in the presentation-adapter itself as these eink panels are ubiquitous across the industry.
E: https://github.com/eink-fan/eink-aosp-lab
https://preview.redd.it/7c7mh13ehdih1.jpg?width=960&format=pjpg&auto=webp&s=75ab18befd0eb43f96a7dcd0dbd6a3621cf9e413
https://redd.it/1vjtmtc
@reddit_android
