v4l2_device_call_until_err(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

okay bestie, welcome to the Kernel API Manual ✨ — this page is serving v4l2_device_call_until_err(9), and she is here to call the specified operation for all subdevs matching the &v4l2_subdev.grp_id, as assigned by the bridge driver, until an error occurs. periodt 💅

✨ SYNOPSIS ✨

v4l2_device_call_until_err (v4l2_dev , grpid , o , f , args... );

🎀 ARGUMENTS 🎀

  • v4l2_dev — the struct v4l2_device that owns the sub-devices you're iterating over. she's the main character holding the whole list 💅
  • grpid — the struct v4l2_subdev->grp_id group ID to match. use 0 to match them all — yes, all of them, no cap 🫶
  • o — name of the element at struct v4l2_subdev_ops that contains f. each element there groups a set of operations functions, like little operation friend groups 🌸
  • f — operation function that will be called if cond matches. the operation functions are defined in groups, according to each element at struct v4l2_subdev_ops ✨
  • args — arguments for f. that's it, that's the args 🎀

🦋 DESCRIPTION 🦋

the way this works: if the operation returns an error other than 0 or -ENOIOCTLCMD for any subdevice, then abort and return with that error code, zero otherwise. so she's a little perfectionist — one real error and she's out 😭💅

💅 NOTE 💅

bestie, subdevs cannot be added or deleted while walking the subdevs list. that's the rule, okay? don't be out here changing the list mid-walk — it's giving chaos 💀🙈

🌈 SEE ALSO 🌈

okay that's the whole page, bestie 🫶 — source is ./include/media, the date/version vibe is October 2026, and the manual is the Kernel API Manual. mwah 💋✨

📦 where this page comes from