I am a newbie to ROM development. Been doing it for the past couple of months. I am compiling Oreo-based ROMs for Oxygen (Xiaomi Mi Max 2). The Oreo sources are not out yet for it.
The issue we have been facing is the "in-call" vol. We are not able to increase or decrease the vol during a call be it from the phones hardware keys or from a headphones hardware keys. For the rest of the media, it works quite good.
I have searched google, git and asked a lot of developers to check and help however it turns out either they are too busy to answer or not interested in helping a noob.
I might not understand a lot about how android works, however, it's a not just for me that I request help. It's for each and every Oxygen user out there using custom ROM that I want to be helped.
I am attaching a call log along with links to the trees I am using, hoping someone out on XDA might be able to help us out.
Oxygen DT : https://github.com/jayant-b/device_xiaomi_oxygen
msm8953-common DT :