PWM backlight

HI NV team!
How do I enable PWM during the bootloader phase?
I need to backlight the screen.

Hi 875225350,

Are you using the devkit or custom board?
What’s your Jetpack version in use?

May I know what’s the use case for you to config PWM during bootloader?
Do you want to show something on your screen earlier?

custom board.
Jetson_Linux_R35.3.1
I need the orin control backlight to show the BIOS interface.

Do you mean the UEFI menu to configure like boot-order…etc?

Do you connect any external DP monitor?
UEFI menu should show on the display.

UEFI menu.
Use eDP for external display.
I am enabling PWM in Ubuntu.
Lighting the backlight requires access to the operating system.

It’s enabled based on dtb entry.
You could just modify device tree to enable PWM.

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