[Kernel-Module] [MM] Sweep2Wake kernel module for Marshmallow

First things first: Hey everyone. Some of you may know me from other devices or because of some Moderator related business. Anyways, I recently thought I needed a tablet upgrade and so decided to order a shield tablet. I have been going through some threads, and was actually kinda surprised that this nice piece of technology doesn't have more development going on, especially regarding kernels.
After a few days of getting to know the tablet I noticed one very useful feature missing: sweep2wake, or at least doubletap2wake.
Unfortunately, though, Nvidia did not yet release the kernel sources for their marshmallow kernel, so I can't add it myself that easily. Which is why I had to make a detour adding s2w to the kernel using a module. This, however, has the downside that I cannot prevent the touchscreen driver from suspending, nor get the information whether the screen is turned on or off. Therefore I need a dedicated background service to retrieve exactly this information and reenable the touchscreen driver.

Requirements

• Android Marshmallow


• Root


• Both the kernel module and my app

Installation

1. Download the latest kernel module and app


2. Install the app


3. Push the kernel module to your internal storage (/sdcard/sweep2wake.ko)

Usage

1. Open the app and press "insmod"
   --> this will load the module but also set selinux to permissive
   --> S2W is now up and running, but can only be used to turn the screen off


2. Press "start" to start the background service
   --> This will reenable the touchscreen driver when the screen got turned off and also tell S2W that the screen is turned off
   --> S2w will now work perfectly fine as long as the tablet is plugged in or another app holds a wakelock. If this is not the case and the tablet is in deep sleep, you will not be able to wake the device and touch input might not work after turning the screen on manually. If this is the case, just turn the screen off and back on and it will work as usual again.
   --> In order to wake the device at all times, start the service with the "enforcing" switch turned on. This will make the service hold a wakelock while the screen is off. However, your battery will drain rather rapidly as the tablet cannot go into deep sleep


3. To stop the service again, simply press "stop"

Keeping in mind that this is still in a rather early stage, I did not add a "enable on boot" option for the service.

I really hope that Nvidia releases the M sources soon, so I can add S2W and DT2W to the kernel properly.
This module should be compatible with all (current) Marshmallow firmwares, on both the old and new shield.

XDA:DevDB Information
Sweep2Wake Module, Kernel for the Nvidia Shield Tablet

Contributors
laufersteppenwolf
Source Code: https://github.com/laufersteppenwolf...a_shieldtablet

Kernel Special Features: Sweep2Wake

Version Information
Status: Beta

Created 2016-01-16
Last Updated 2016-01-16

Download from this link