cmdq_pkt_write(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cmdq_pkt_write — like, the whole vibe ✨

okay so real talk, this page lives in the Kernel API Manual (section 9, iykyk) and it's all about cmdq_pkt_write — the function that literally just appends a write command to the CMDQ packet. that's it. that's the whole thing. she's simple, she's iconic, she does exactly one job and does it slayfully 💖

✨ SYNOPSIS ✨

int cmdq_pkt_write (struct cmdq_pkt *pkt , u8 subsys , u16 offset , u32
value );

like yes bestie, that's the whole signature 🎀 five things: a return type, a packet, a subsystem code, an offset, and the value. no notes. periodt.

🌸 ARGUMENTS 🌸

  • pkt — the CMDQ packet 🫶 this is the thing you're stuffing the write command into, bestie. giving main character energy, holding everyone else's commands.
  • subsys — the CMDQ sub system code 🌈 it's a u8, it tells the packet which subsystem you're talking to. think of it as the group chat you're posting in.
  • offset — register offset from the CMDQ sub system 🎯 a u16, relative to that subsystem. not the absolute address, just the offset from where the subsystem starts. lowkey important distinction ngl.
  • value — the specified target register value 💜 a u32 — the actual data you want written. the moment. the payload. the reason we're all here.

🔥 RETURN 🔥

0 for success 🎉 — and if it's not 0? then the error code is returned 💀 so like, check it. don't just assume it ate. fr fr.

🦋 SEE ALSO 🦋

okay this is the part where the manpage just goes off and lists literally the entire extended universe of CMDQ functions 😭 and honestly? we love a comprehensive friend group.

the Kernel file lives at ./include/linux/soc/mediatek/mtk-cmdq.h — that's the source of truth, go read it 🧚

and the whole squad, in order:

like, every single one of them. no skips. we respect the roster 👑

aaaand that's the page!! sourced straight from ./include/linux/soc/mediatek, dated October 2026 ⭐ signing off bestie, go forth and append your writes responsibly 💅✨🌸

📦 where this page comes from