scp_ipi_register(9)

💅 scp_ipi_register — a Kernel API Manual moment (that's the 9 in scp_ipi_register(9), iykyk)

okay so bestie, we're in the Kernel API Manual today and this page is genuinely the origin story of one function. sit down, hydrate, let's go 🫶

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✨ NAME ✨

scp_ipi_register — register an ipi function. that's it. that's the whole vibe check. 💫

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🌸 SYNOPSIS 🌸

int scp_ipi_register (struct mtk_scp *scp , u32 id , scp_ipi_handler_t
handler , void *priv );

literally four things in, one int out. the way that signature just works 😭👑

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🎀 ARGUMENTS 🎀

• scp — the mtk_scp structure. this is the main character, the whole context, the vessel for your dreams 💜
• id — the IPI ID. which one? that one. you pick, bestie, it's a u32 🦋
• handler — the IPI handler, an scp_ipi_handler_t. the function that actually does the thing when the interrupt shows up 🎯
• priv — private data for the IPI handler, a void *. your lil' baggage that travels along with it, no cap 🧳

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🔥 DESCRIPTION 🔥

so the actual tea: you call this to register an ipi function to receive ipi interrupt from SCP. like, you're handing the system your handler and saying "whenever an IPI interrupt comes through from SCP, this is who you call, periodt." 📞✨

attaching your priv so your handler knows who it's working with, and your id so everyone agrees on which IPI we're even talking about. iconic behavior, honestly 💅

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⭐ RETURN ⭐

0 if the ipi registers successfully, and -error on error. that's the whole deal — zero is the slay outcome, and anything negative is the "we don't talk about it" outcome 💀🙈

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🌈 SEE ALSO 🌈

• the kernel file ./drivers/remoteproc/mtk_scp_ipi.c
• scp_ipi_unregister(9) — the breakup arc 💔
• scp_ipi_lock(9) — protect the vibes 🔒
• scp_ipi_unlock(9) — release the vibes 🔓
• scp_ipi_send(9) — send it, bestie 📤

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okay that's the page!! this little gem lives down in ./drivers/remoteproc, dated October 2026, and it goes by scp_ipi_register(9) — go forth and register your IPIs responsibly, mwah 🧚💖🎀