Xavier Industrial can't enter Deep Sleep mode

[admi537]

In my Xavier Industrial module, jetson linux version:R32.7.2
I tried this command:
sudo systemctl suspend
it says: “Failed to suspend system via logind: Sleep verb not supported” then nothing happen

I also tried :sudo bash -c “echo mem > /sys/power/state”
It failed as
“bash: line 0: echo: write error: Invalid argument”

I tried: cat /sys/power/state
the command show :freeze

I just want to enter Deep Sleep(SC7) mode and wake up module to normal mode.
What can I do for it?
Thanks

[WayneWWW]

Please remove nvidia,system-lp0-disable in your device tree. This would enable the sc7.

psci {
		nvidia,system-lp0-disable;
	};