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 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.
dcb_tool is packaged in the
Refer to the
<top>/Linux_for_Tegra/tools/dcb_tool/readme.txt file for more information about
dcb_tool commands and their usage.
To update the DCB blob, users need to reflash the Orin platform.
Display Device Tree Parameters¶
Refer to the
file from the source code for information about these parameters.
Changing the Display Function Between DP and HDMI¶
The Jetson Orin SOM provides DP or HDMI functionality. The pinmux sheet contains the tab for DP and HDMI. Depending on their custom carrier board design, end users should generate the appropriate pinmux files. In addition to pinmux changes, the kernel display dtsi files needs to be included in the carrier board kernel DT files, which contains DCB blob update to change between DP and HDMI Refer to Orin Display Configuration.
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.