Orin Nano/NX with HDMI Display 1440x2560 black screen on custom board

Hi,

We have designed a custom Mother board with HDMI in line with Dev kit carrier board.

Software : SDK manager and 6.0 or 6.2 Jet pack(Tried both)
We have changed the following in the DTS as we don’t have the carrier EEPROM.
In file
Linux_for_Tegra/bootloader/generic/BCT/tegra234-mb2-bct-misc-p3767-0000.dts

  • cvb_eeprom_read_size = <0x100>
  • cvb_eeprom_read_size = <0x0>

Hardware :
We have made sure we give the power to screen using USB.
I am getting the following error in dmesg :

Attached is the
dmesg.txt (67.8 KB)
Can some one help on how to get the screen work.
Its not consistent, as when ever I see this exception, The xrender --auto will show the display connected but there will be no output on screen when booted up.
xrandr command output is :
Screen 0: minimum 8 x 8, current 1440 x 2560, maximum 32767 x 32767
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1440x2560+0+0 (normal left inverted right x axis y axis) 1440mm x 2560mm
1440x2560 50.00*+

How do I make sure its consistent and I get the display always.
I have tried with JP 6.0 and 6.2 both, Same issue.
Any help will be appreciable.

Hi,

When you saw “DP-0/DP1” in your xrandr, it means the configuration is wrong. If the configuration is correct, you will see “HDMI-0” in xrandr.

You need to configure the DCB image to HDMI mode.

Please refer to p3509-a02-p3767-0000.conf . This file has all the HDMI software needed.

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