Bluetooth CSR8510 not working with Rock64 Android 7.1

[AlexS]

What can i do to somehow solve this bluetooth problem ? I have time to tweak with this and i have a willing to do that. But probably very low knowledge about how to support bluetooth device.
It is seen actually by the ATV 7.1 image (this is from dmesg output):

[ 2.146782] [1: swapper/0: 1] Bluetooth: HCI UART driver ver 2.2
[ 2.146813] [1: swapper/0: 1] Bluetooth: HCI H4 protocol initialized
[ 2.146839] [1: swapper/0: 1] Bluetooth: HCILL protocol initialized
[ 2.146865] [1: swapper/0: 1] rtk_btusb: RTKBT_RELEASE_NAME: 20170109_TV_ANDROID_6.x
[ 2.146891] [1: swapper/0: 1] rtk_btusb: Realtek Bluetooth USB driver module init, version 4.1.2
[ 2.146918] [1: swapper/0: 1] rtk_btusb: Register usb char device interface for BT driver
[ 2.147188] [1: swapper/0: 1] usbcore: registered new interface driver rtk_btusb

[ 2.420490] [1: swapper/0: 1] Bluetooth: RFCOMM TTY layer initialized
[ 2.420551] [1: swapper/0: 1] Bluetooth: RFCOMM socket layer initialized
[ 2.420572] [1: swapper/0: 1] Bluetooth: RFCOMM ver 1.11
[ 2.420594] [1: swapper/0: 1] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 2.420613] [1: swapper/0: 1] Bluetooth: BNEP filters: protocol multicast
[ 2.420642] [1: swapper/0: 1] Bluetooth: BNEP socket layer initialized
[ 2.420664] [1: swapper/0: 1] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 2.420691] [1: swapper/0: 1] Bluetooth: HIDP socket layer initialized

[ 2.544356] [0: khubd: 40] usb 1-1: New USB device found, idVendor=0a12, idProduct=0001
[ 2.544388] [0: khubd: 40] usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 2.544411] [0: khubd: 40] usb 1-1: Product: CSR8510 A10 (!!!)

but no support with android settings at all. If someone could direct me, we could probably make it working. Or i'm too optimistic???