QT5.6.3 and KMS/DRM backend is not rendering

Autonomous Machines Jetson & Embedded Systems Jetson TX2
4

Hi,

I found only one similar issue in forum, see [mmapi] how to make dual display(DP+DSI) show different video - #18 by WayneWWW

But in that issue QT version is 5.9 and QT KMS/DRM backends have been patched for custom needs, which is not needed in my case I think.

  • I checked that on both QT 5.6.3 and QT 5.12.4 device drm-nvdc is opened and layer plane 4001 is used for renderning.
  • fb0 win_mask setting is in both cases 0x38, which is what we need.
  • in both cases we use yocto recipes to build against.