HDMI In and Displayport out

Question

Hello,

I wonder if someone has done a pipeline from HDMI in and Displayport out on the Ultrazed? No VCU, yet.

The Avnet 2018.3 Example Design used ZCU106 TRD but stripped out hdmi as an example. What's the reason for strip out hdmi? How would the steps be applicable to with-hdmi ( I did encountered the license issue for hdmi_rx) ?

Also, the TRD does not send to displayport so I need to redo a gstreamer pipeline.

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/25329832/Zynq+UltraScale+MPSoC+VCU+TRD+2018.3

Thanks,

Liyong Z.

drozwood90 · Accepted Answer

Hi there,

As far as I know, it was not explicitly stripped out, it just was not added in. As it has been explained to me, the Avnet port follows the Xilinx TRD, and there should be a module you can bring in to add that.

We did not add that because it was not relevant for what we wanted to show. The design that we have ported can take files from the SDCARD as well as a gstreamer input from a USB Webcam and loop that through the VCU. Be mindful that on the current UltraZed-EV EVCC (Starter Kit Carrier Card) you will need to modify the kernel to get HDMI to be happy under PetaLinux. I do not have a solution for that nor an example - for now it might be better to stick with Displayport and use an external adapter, at least to start with.

Have you seen the latest roadtest? If you are interested in that kind of work or doing something really interesting with this, that could be a way to show off your skills with this system as well as receive a free UltraZed-EV!

--Dan

ontran · Answer

Hello Dan,

Thanks for your quick response and clarification.

I would image there are quite some use cases for 7EV. The pipeline would be like (1) Bring video in: to the PL, either HDMI or network or data aquisition or camera raw; (2) then video processing: with PL (that's why people use FPGA); (3) Output: typically multiple of them with live display out, network streaming, file saving, (using H.26x), etc. If you have a working example, that would certainly accelerate our development time. Hope you could build such an example in the future.

Xilinx did have an example of HDMI in and out. Not exactly what I need, but I try to dig that way:

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842436/Zynq+UltraScale+MPSoC+-+ZCU106+HDMI+Example+Design

I don't know about roadtest. What's about? Google of "avnet roadtest" didn't get anything.

Thanks again.

Liyong

drozwood90 · Answer

Hi there,

It is a program run by Element 14.

Avnet UltraZed-EV Starter Kit

Having HDMI has been on my list of projects for some time - but as I mentioned, it was explained to me that the TRD and our port of this allows for that. I've never tried it, but it should be in there - at least as it was explained to me.

--Dan