delegate_domain(9)

💅 delegate_domain(9) — straight from the Kernel API Manual 🎀

okay so bestie, welcome to the Kernel API Manual corner where we're talking about delegate_domain. This one is literally about handing control of a domain to the MCU. Stay for the vibes, stay for the facts. ✨

🌸 NAME 🌸

delegate_domain — delegate control of a domain to MCU. no cap, that's the whole assignment.

✨ SYNOPSIS ✨

int delegate_domain (struct panthor_device *ptdev , u32 domain );

🎀 ARGUMENTS 🎀

• ptdev — the Device. yes, that one.
• domain — the Domain to delegate the control. hand it over, bestie.

💖 DESCRIPTION 💖

So this function delegates control of a domain to the MCU. that's the main character move.

🚨 but listen: delegating the L2 domain is prohibited. Not "maybe don't," not "use your judgment" — prohibited, periodt. do not do it. 💀

🫶 RETURN 🫶

• 0 on success or delegated already. slay, it worked (or it was already done).
• -EPERM if domain is L2. yep, because L2 is the forbidden one.
• A negative error code otherwise. something else went sideways, check the code.

👑 SEE ALSO 👑

• Kernel file ./drivers/gpu/drm/panthor/panthor_pwr.c — struct panthor_pwr(9), retract_domain(9), panthor_pwr_domain_force_off(9).

and that's the whole page, bestie. signed off from the source path ./drivers/gpu/drm/panthor, dated October 2026 🦋💜