.. _SD.Kernel.KernelAdaptation:

.. include:: /content/swdocs.rsts

.. spelling::
   CBoot
   Plug-in
   DTBO
   Bootlin
   gcc
   aarch


Kernel Adaptation 
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This section provides high level guides for users to port from the prior Kernel version 4.9 from rel-32 releases, to the Kernel version 5.10 supported in this r34 release.

From Rel-32 Kernel 4.9 to rel-34 Kernel 5.10
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Compiler Update
###############

- The compiler has changed to Bootlin gcc 9.3.0 2020.08-1 aarch64 toolchain
  See the topic :ref:`Jetson Linux Toolchain <AT.JetsonLinuxToolchain>`.

Plug-in Manager replaced by DTBO
################################

- The UEFI supported DTBO (Device Tree Blob for Overlay) has replaced the CBoot supported Plug-in Manager.

Carrier Board Customization Notes 
#################################

- For Jetson AGX Orin, to modify display from the default DP to HDMI, see the topic :ref:`Display Configuration And BringUp <SD.Kernel.DisplayConfigurationAndBringUp>`.

Minor Version Update
####################

- Minor version update on the Kernel will be provided in the subsequent releases.