comment lines for sor0 and sor1 (with “nvidia,typec-port = /bits/ 8 <0>;”) in tegra194-p2888-0001-p2822-0000-common.dtsi (in /hardware/nvidia/platform/t19x/galen/kernel-dts/common/);
changed tegra194-p2822-disp.dtsi (in /hardware/nvidia/platform/t19x/galen/kernel-dts/common/) for disable head0 and head2. Do I understand correctly that only head1 with sor0 should remain enable?
power on Jetson module with original carrier board, after booting Ubuntu delete file /boot/extlinux/extlinux.conf.
build new dt (./nvbuild.sh).
copy tegra194-p2888-0001-p2822-0000.dtb from <build_dir>/arch/arm64/boot/dts/nvidia/ to Linux_for_Tegra (directory where flash.sh is located).
setup custom carrier board and load to recovery, after this flashed with cmd: sudo ./flash.sh -r -k kernel-dtb -d tegra194-p2888-0001-p2822-0000.dtb jetson-agx-xavier-devkit mmcblk0p1
I flashed JetPack 4.6.2, build DT with l4t 32.6.1, boot Ubuntu18 and remove /boot/extlinux/extlinux.conf file. After this I flashed a new dtb and DP still not working. What could I be missing? dmesg.txt (60.0 KB)
From schematic the pins of the display port on the Jetson devkit board and on the my custom board are the same. But I made my own version of the pinmux file anyway, replaced the files in the /t186ref/BCT/ folder and flashed the full system - no change. It might be worth trying a different adapter (because we use a mini connector, we have to use an adapter to VGA).
Some update for my issue. We found out that there was a hardware problem on the board - incorrect connection to the DP pins (mixed up). I received a special cable where the pins must be changed to the correct ones. In dmesg, I see that the DP is determined, but there is still no image. Also, the problem may be in the cable itself, because. no one checked it. I am attaching the dmesg with the DP errors and the current DT. dt-from-fs.dts (358.9 KB) dmesg251122.txt (124.1 KB)
