No 4k output on Qualcomm Robotics RB3 Platform(SDA845) (Thundercomm)

[HowardDunn]

Using the thundercomm board for the 845c. Built an image using the warrior branch 5.2 kernel. The HDMI output maxes out at 1920x1080p @ 60Hz. The hardware manual I believe says the HDMI can output 4k @ 30hz.

There is also an issue drawing to the display, when using gstreamer to draw multiple videos on the screen, the videos would decode but the screen has a hard time drawing the videos to the screen. I've tried both an X11 and Weston image but still see the weird screen drawing issue. Using the v4l2decoder with gstreamer with the xvimagesink on X11 and the waylandsink on Weston. The videos would flicker on the screen. I also launched a GTK application and that flickered briefly as well. It also crashes the device frequently whenever I run the gstreamer pipelines.