Adding a new MIPI-DSI Driver to an existing kernel.

Hi

Since many days, iam trying to get a DSI-Display up and running.
Unfortunately with no success.

HW: Asus Tinker-S Board

What i have tried is: using panel-simple and configure all the timings. Unfortunately, this was not successfull.

Now i would like to try to implement an own driver.
here is my code: https://pastebin.com/sZhgeKmu

Unfortunately i dont know how to go on now.
I have a board, running armbian on it. I would like to build this driver as a kernel module for this particular kernel (4.4.199-rockchip)
And then load the driver.

There is also a question about device-tree.
Here is my actualy try, to include this driver:

&mipi_dsi {
status = "okay";
mipi_panel: mipi-panel {
compatible ="dmb,rb070d30";
reg = <0x0 0>;
status = "okay";
reset-gpios = ;
};
};

Can i assign a gpio the way i tried it?

Thank you for your support.
Regards
swissbyte