v4l2_ctrl_ptr_create(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_ctrl_ptr_create — the Kernel API Manual page you didn't know you needed 🎀

okay so bestie, welcome to section 9 of the Kernel API Manual 🌸 this one is genuinely short and sweet — it's one of those lil helper functions that's like two lines of code but saves you a cast that would otherwise make you cry. no cap.

✨ NAME ✨

v4l2_ctrl_ptr_create — the helper function that hands you back a v4l2_ctrl_ptr when all you've got is a void pointer 🫶

like, it literally does the type-pun for you so you don't have to. it's giving "small but essential". 💜

🌈 SYNOPSIS 🌈

union v4l2_ctrl_ptr v4l2_ctrl_ptr_create (void *ptr );

that's it. that's the whole vibe. one argument in, one union out. 🔥

🦋 ARGUMENTS 🦋

  • ptr — The void pointer 💫 (yes, that's genuinely all the docs say, and honestly? iconic. it's just the void pointer, the one you're wrapping up into the union.)

👑 SEE ALSO 👑

bestie, this is the part where the manpage just. goes. off. like it's a whole group chat of related symbols and we're tagging everyone. the kernel file in question is ./include/media/v4l2-ctrls.h, and everything below lives in that same universe:

the actual types & structs 💅

  • union v4l2_ctrl_ptr(9)
  • struct v4l2_ctrl_ops(9)
  • struct v4l2_ctrl_type_ops(9)
  • v4l2_ctrl_notify_fnc(9)
  • struct v4l2_ctrl(9)
  • struct v4l2_ctrl_ref(9)
  • struct v4l2_ctrl_handler(9)
  • struct v4l2_ctrl_config(9)

handler setup & lifetime energy 🧚

making new controls (the main character section) ⭐

activation, grabbing, tweaking 🌸

names & menus 🍓

getters and setters, aka the whole point 🔥

merging, logging, polling 💀

request API squad 🌈

the classic ioctl-adjacent crew (iykyk) 💖

subdev & fwnode goodies 🎀

the type ops (lowkey the real MVPs) 🧚

ngl that SEE ALSO list is longer than the function itself, but every single one of those is a real reference from the original page so we keep them ALL. no skips, no summarising, periodt. 💅

and that's the whole page, bestie!! told you it was short 🫶 this cutie comes to you from ./include/media, dated October 2026, and it lives in the Kernel API Manual as v4l2_ctrl_ptr_create(9) — go forth and cast responsibly ✨💜🎀

📦 where this page comes from