HDMI signal and power delivery over USB

[the_bobescu]

Hi guys, so it's my very first post here even though I've been watching Linus for years.

 

So, I've been thinking for some time of adding a secondary screen to my laptop(project Valerie stile) and I got it mostly figured, but for the sake of cable management I want to know if I can use the same USB A port for both power delivery and HDMI signal(I know it's possible but hear me out).I would have to use a USB A to HDMI cable for signal and I want to know if I could use a USB hub so one cable would be for signal and another one for power. I will be using a USB power delivery board for the 12v that the controller needs. The power consumption is around 10- 20W.

Basically something like this

                                                                      /------>  USB to HDMI cable------->  controller board HDMI port 

USB 3.1 gen 1(power+hdmi)------>USB hub                                                     

                                                                      \------>  USB C PD board---------->   controller board power port 

 

P.S.  I'm going to be using one of the 2 UBS A ports from the back of my Lenovo Legion 5.

[Kilrah]

57 minutes ago, the_bobescu said:

I don't know anything about the overall power consumption of the board and display

Well figuring that out would be the first step...