And it won’t help even if you manage to configure the HDMI stuff correctly since the BPi team disables every touchscreen controller except the one for their own 5" TFT:
Always remember: Every Banana past the M1 is a product without any support.
I’m using the TOUCHSCREEN LCD 7 "S070WV20-CT16 with Banana Pi M64 and the touch screen is not working on Android 6.0.1 Release 2018-10-24! I already tried compiling the kernel 6.0.1 android 3.10 with the (bpi-m64-lcd or bpi-m64-lcd7) option and the touch screen does not work! The second problem I noticed is that from HDMI connected in android 6.0.1 kernel 3.10 (bpi-m64-lcd or bpi-m64 -lcd7), The Banana Pi M64 does not booting! Can anyone help me? Sorry my English!