Custom board, hdmi display not showing

[WayneWWW]

Hi,

[ 23.078] (–) NVIDIA(GPU-0): DFP-0: disconnected
[ 23.078] (–) NVIDIA(GPU-0): DFP-0: Internal TMDS
[ 23.078] (–) NVIDIA(GPU-0): DFP-0: 165.0 MHz maximum pixel clock
[ 23.078] (–) NVIDIA(GPU-0):
[ 23.079] (–) NVIDIA(GPU-0): DFP-1: disconnected
[ 23.079] (–) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 23.079] (–) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[ 23.079] (–) NVIDIA(GPU-0):
[ 27.052] (–) NVIDIA(GPU-0): DFP-0: disconnected
[ 27.052] (–) NVIDIA(GPU-0): DFP-0: Internal TMDS
[ 27.052] (–) NVIDIA(GPU-0): DFP-0: 165.0 MHz maximum pixel clock
[ 27.052] (–) NVIDIA(GPU-0):
[ 27.054] (–) NVIDIA(GPU-0): DFP-1: disconnected
[ 27.054] (–) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 27.054] (–) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[ 27.054] (–) NVIDIA(GPU-0):

This log shows HDMI connection is not detected. Looks like the hotplug related pin is not added.

You could also check this post which is doing similar thing as your case.

HDMI Output cannnot work in AGX Orin based CustomBoard 35.3.1

Hi, The only check items for Orin HDMI are Pinmux DCB in dtb file needs to be correct. hotplug properties need to be added. Full flash instead of partial update. And the only method to check this is xorg.0.log and xrandr result. Dmesg won’t show and /sys/kernel/debug/gpio won’t show anything either because the hotplug is handled by DCE R5 core. Not CCPLEX.