We have provided a test verison of Real Time kernel for Edge2 Linux system, if you want to experience this kernel you can follow the steps below to build the images.

You need to apply a patch to fenix to support the Real Time kernel branch.

rt.patch

diff --git a/config/boards/Edge2.conf b/config/boards/Edge2.conf
index 429e299f..9b8a974c 100644
--- a/config/boards/Edge2.conf
+++ b/config/boards/Edge2.conf
@@ -35,7 +35,7 @@ case "$LINUX" in
                LINUX_DTB="arch/arm64/boot/dts/rockchip/rk3588s-khadas-edge2.dtb"
                [ "$LINUX_VENDOR_DIR" ] && \
                LINUX_DIR=$(realpath "$LINUX_VENDOR_DIR")
-               LINUX_GIT_BRANCH="khadas-edges-5.10.y-release-v1.0.0"
+               LINUX_GIT_BRANCH="khadas-edges-5.10.y-rt-test"
                LINUX_DEFCONFIG="${LINUX_DEFCONFIG:-kedges_defconfig}"
                SERIALCON="ttyFIQ0"
                BOOT_SCRIPT_BOARD=""

You can follow Build Ubuntu to build the Real Time kernel Ubuntu images.

You can find the Real Time kernel source here: linux/tree/khadas-edges-5.10.y-rt-test