For Jetson AGX Orin ONLY (This does NOT apply to Jetson AGX Xavier)

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Enabling HDMI on Custom Carrier Boards
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This information is specific for modifying the device tree file for your custom carrier board and does not apply when you use the Developer Kit carrier board.

1. Download the example HDMI DTS file

   Download the “tegra234-dcb-p3701-0000-a02-p3737-0000-a01_hdmi.dtsi” file from https://developer.nvidia.com/embedded/jetson-linux-r3411 

2. Modify kernel dts with HDMI connector support

   The JetPack5.0-DP release Kernel sources includes a dtsi file that sets DCB with DP connector support by default. Users will need to update the provided dtsi file with the downloaded dtsi file to enable HDMI setting.

   Path: <Kernel_Sources>/hardware/nvidia/platform/t23x/concord/kernel-dts/

3. Modify your board dts to replace the default DCB dtsi:

--- a/tegra234-p3701-0000-p3737-0000.dts
+++ b/tegra234-p3701-0000-p3737-0000.dts
@@ -17,7 +17,7 @@
#include "cvm/tegra234-p3701-0000.dtsi"
#include "cvb/tegra234-p3737-0000-a00.dtsi"
#include "tegra234-power-tree-p3701-0000-p3737-0000.dtsi"
-#include "tegra234-dcb-p3701-0000-a02-p3737-0000-a01.dtsi"
+#include "tegra234-dcb-p3701-0000-a02-p3737-0000-a01_hdmi.dtsi"
#include <tegra234-soc/mods-simple-bus.dtsi>
#include "cvb/tegra234-p3737-camera-modules.dtsi"
Recompile the Kernel by completing instructions in Kernel Customization .

4. Reflash your board with the updated Kernel and Kernel DTB

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Known Limitation:
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The display driver firmware present in the JP5.0-DP release only supports HDMI HPD on Main GPIO controller, Port M, pin 0:

(TEGRA234_MAIN_GPIO(M, 0))

Support to customize by using HDMI HPD on a different GPIO controller/pin/port will be provided in the JetPack 5.0 GA release.