@prcups try using this kernel its the rkr3 latest from rockchip
https://repo.bredos.org/repo/BredOS/aarch64/linux-rockchip-rkr3-6.1.75-8-aarch64.pkg.tar.zst
https://repo.bredos.org/repo/BredOS/aarch64/linux-rockchip-rkr3-headers-6.1.75-8-aarch64.pkg.tar.zst
https://repo.bredos.org/repo/BredOS/aarch64/mali-G610-firmware-rkr4-20240204-3-aarch64.pkg.tar.zst
then fix the kernel in extlinux.conf and enable the overlay
kernel /vmlinuz-linux-rockchip-rkr3
initrd /initramfs-linux-rockchip-rkr3.img
fdtoverlays /dtbs/rockchip/overlay/rockchip-rk3588-panthor-gpu.dtbo