Questions about the DP output of the Rock Pi 4C

The Rock Pi 4C specs stated the following.

Mini DP to HDMI is not supported. You can only convert Mini DP to DP connector.

Is the reason you can’t convert from DP output to HDMI because the DP output is 2 lanes?
I would like to know why. Please let me know.

1 Like

I think it’s a driver issue currently but I can not confirm that because DP is splitted from the type C phy, that’s why it’s only 2lanes. Because for USB 3.0 type C, the DP is shared with USB3.0, when DP is 4K@60, USB drops back to 2.0.

I was able to confirm that the miniDP to HDMI conversion can be done correctly as long as it is an active conversion, referring to the following.

Perhaps it means that you have to be an active convert to be able to display it properly.
Either way, this problem has been solved.

It looks like the solution. We will try to find some “active” DP to HDMI converters.

1 Like