vpu_ipi_send(9)

💅 vpu_ipi_send(9) — like, the Kernel API Manual page, bestie 🎀

okay so bestie, welcome to the Kernel API Manual entry for vpu_ipi_send(9) — this is the whole vibe, let's get into it ✨

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🌸 NAME 🌸

vpu_ipi_send — send data from AP to vpu. literally that's the whole job, no cap 🫶

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🦋 SYNOPSIS 🦋

int vpu_ipi_send (struct platform_device *pdev , enum ipi_id id , void
*buf , unsigned int len );

that's the whole signature, copied exactly bestie, don't come for me 💅

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⭐ ARGUMENTS ⭐

• pdev — the VPU platform device 🎀 (yes, the device. the platform-y one.)
• id — the IPI ID 👑 (it's an enum ipi_id, iykyk)
• buf — the data buffer 🍓 (this is where your actual data lives)
• len — the data buffer length 🌸 (how much of buf you actually mean)

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — this function is thread-safe. like, genuinely, you can call it from multiple threads and it just works, no drama 🙈

and the timing is the iconic part: the moment this function returns, the VPU has already received the data and has started processing it. not me sending it and it's already being handled 🔥

when the processing completes, the IPI handler you registered with vpu_ipi_register gets called — and heads up bestie, it gets called in interrupt context ⚡ so be normal about that please 💀

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🌈 RETURN 🌈

returns 0 if sending the data went successfully 🎉 — otherwise, it's a fail, and that's that 😭

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🧚 SEE ALSO 🧚

the kernel file is ./drivers/media/platform/mediatek/vpu/mtk_vpu.h and it's giving main character energy ✨ go read it, then go read all of these:

• VPU(9)
• enum ipi_id(9)
• enum rst_id(9)
• vpu_ipi_register(9)
• vpu_get_plat_device(9)
• vpu_wdt_reg_handler(9)
• vpu_get_vdec_hw_capa(9)
• vpu_get_venc_hw_capa(9)
• vpu_load_firmware(9)
• vpu_mapping_dm_addr(9)

like, the whole squad, obsessed 💜

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k that's the page!! sending you good vibes and correct len values only 🫶💖

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sign-off time 🎀 — this lil entry lives in ./drivers/media/platform/media..., it's dated October 2026, and it's filed under the vpu_ipi_send(9) header, periodt 💅✨