v4l2_ctrl_find(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_ctrl_find(9) — like, the Kernel API Manual, bestie ✨

Okay so real talk, we're in the Kernel API Manual today and the main character is v4l2_ctrl_find(9) 💖

🌸 NAME 🌸

v4l2_ctrl_find — find a control with the given ID. That's it, that's the whole vibe. You got an ID, you want the control, boom. 🔍

✨ SYNOPSIS ✨

struct v4l2_ctrl * v4l2_ctrl_find (struct v4l2_ctrl_handler *hdl , u32
id );

Like, it takes a handler and an id and gives you back a struct v4l2_ctrl *. Slay. 🫶

🎀 ARGUMENTS 🎀

  • hdl — the control handler. Your main character struct, the one holding all the controls.
  • id — the control ID you're trying to find. The little name tag you're matching against. 🏷️

🦋 DESCRIPTION 🦋

Okay so here's the tea, bestie: if hdl == NULL this will return NULL as well. No handler, no control, no problem — it's just not gonna happen. 💀

⚠️ BIG ONE, no cap: this will lock the handler, so do not use it from inside v4l2_ctrl_ops. Like, literally don't. That's how you get yourself into trouble. 🙈

🌈 SEE ALSO 🌈

Kernel file ./include/media/v4l2-ctrls.h — and honestly the whole friend group showed up for this one, so let's give them all their moment 💅:

And that's the whole page, bestie 🍓 Coming at you from ./include/media, October 2026 edition — stay locked, stay iconic, and never call this from inside v4l2_ctrl_ops, ily 💜🧚

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