Orin specific Display Configuration

Update DCB blob for Custom Carrier Boards

Display Control Block (DCB) describes the display outputs and their configurations on a platform. Refer to https://download.nvidia.com/open-gpu-doc/DCB/2/DCB-4.x-Specification.html for more information about DCB.

The DCB blob is stored in platform specific dtsi files in the nvidia,dcb-image property under the display node. AGX Orin’s DCB blob is in the tegra234-dcb-p3701-0000-a02-p3737-0000-a01.dtsi file.

dcb_tool:

DCB blob is made up of hex values, which makes it difficult to decode/edit manually. dcb_tool helps parse DCB blob in dtsi file and also helps modify the values of the fields in the DCB blob. The dcb_tool is packaged in the <top>/Linux_for_Tegra/tools/dcb_tool/ directory.

Refer to the <top>/Linux_for_Tegra/tools/dcb_tool/readme.txt file for more information about the dcb_tool commands and their usage.

Note

To update the DCB blob, users need to reflash the Orin platform.

Display Device Tree Parameters

Refer to the <kernel-source-path>/nvidia/Documentation/devicetree/bindings/video/nvidia,tegra234-display.txt file from the source code for information about these parameters.

Known Limitations

• Seamless display: This feature will be supported in future releases for DP and HDMI.

• Fb Console: Kernel frame buffer console is not supported currently. It will be supported along with the Seamless display feature.