cmdq_pkt_write_pa(9)

📦 version 7.3.1, in nixpkgs unstable

✨ cmdq_pkt_write_pa(9) ✨

okay so bestie, this is a page from the Kernel API Manual 💖 and honestly it's kind of a small icon — a little function that appends a write command to your CMDQ packet, but it does it with pa_base, which is the whole plot twist here. let's get into it 🎀

🌸 NAME 🌸

cmdq_pkt_write_pa — append write command to the CMDQ packet with pa_base 🫶

🦋 SYNOPSIS 🦋

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

like… that's the whole signature, and yes the spacing is a little chaotic but she's iconic, we respect it 💅

🌈 ARGUMENTS 🌈

  • pkt — the CMDQ packet 🙈 this is your main character, the thing you're appending to
  • subsys — unused parameter 😭 literally not used, it's just… there. a decorative parameter. we still love her
  • pa_base — the physical address base of the hardware register 👑 this is the special sauce that makes this the _pa version
  • offset — register offset from CMDQ sub system ⭐
  • value — the specified target register value 💜 the actual thing you want written, bestie

🌟 RETURN 🌟

0 for success 💖 … and if it's not 0, then the error code is returned. so like, vibe check the return value ngl 😭

fr fr, don't ignore the return value. 0 = she slayed, anything else = something went sideways and you get an error code back.

🧚 SEE ALSO 🧚

Kernel file ./include/linux/soc/mediatek/mtk-cmdq.h — that's the one, go look at it 🎀

like… that's a whole friend group of functions and cmdq_pkt_write_pa is absolutely one of them, no cap 😌

and that's the page, bestie 🍓 sourced from ./include/linux/soc/mediatek, dated October 2026, and filed under cmdq_pkt_write_pa(9) — mwah, go write some registers responsibly 💅✨

📦 where this page comes from