when msp_displayport_mux started, channel number not updated when channel was change by user about msp-osd

[bri3d]

You just need to add setprop dji.hdvt_uav_service 1 to restart the UAV service which runs the radio commands on the air side.

This will also restart the DJI OSD MSP commands (even if you disable the DJI OSD, it still sends them), which might or might not make your DisplayPort OSD unacceptably slow as well.

I am going to add a feature soon to the serial mux to try to add fake responses and reduce the load presented by the DJI spam (and allow for platforms like Ardupilot where a serial port can't be DisplayPort and request/response MSP at the same time).

There are several features like this which I wanted to add before I started shipping releases.

p.s. did you talk to @j005u about installers? He is also working on something for margerine in general.