mobile

I have an OTG Y-Cable and I want to enable charging while also using the attached USB device (a HiFimeDIY DAC) but I can't make it work. The USB device receives power and works great but my phone does not charge. I have tried 3 different Y-cables so that's not the problem. Is it the kernel? I'm rooted SPH-L720 on Ktoonsez Kernel. any help would be appreciated. thanks.
SPH-L720
Rooted
4.4.2 Touchwiz
KT-SGS4-KK4.4