How to enable "double tap to wake up" in any android device? I've heard about the feature "double tap to wake up". How to enable this option on my device
My device details:
Gionee P3 Lollipop Cyanogenmod 12.1
Kernel Version 3.4.67
It can be enabled only if your ROM/ kernel support that feature. To check if it is enabled download 3C Toolbox from Play Store , go to System Manager &rarr; Miscellaneous  and you will have an option that shows up to enable double tap feature, IF it is supported. Figure shows it is not supported on my device

I am not aware if CM supports enabling this feature using the inbuilt settings