v4l2_subdev...e_pad_1_to_1(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_subdev_get_fwnode_pad_1_to_1(9) ✨

okay so bestie, welcome to the Kernel API Manual 🎀 — this one's a tiny lil function with a very long name, and honestly? it's giving "one job, does it well" energy. let's get into it 🫶

🌸 NAME 🌸

v4l2_subdev_get_fwnode_pad_1_to_1 — get the pad number from a subdev fwnode endpoint, assuming a 1:1 port:pad mapping 💫

like, port 0 → pad 0, port 1 → pad 1, no cap, that's the whole vibe 🙈

⭐ SYNOPSIS ⭐

int v4l2_subdev_get_fwnode_pad_1_to_1 (struct media_entity *entity ,
struct fwnode_endpoint *endpoint );

that's it. two pointers, one int coming back at ya 🔥

🦋 ARGUMENTS 🦋

  • entity — pointer to the subdev entity 👑 this is the main character of the call
  • endpoint — pointer to a parsed fwnode endpoint 🌈 already parsed, thank u very much, none of that raw-string nonsense here

💖 DESCRIPTION 💖

so here's the tea ☕ — you can use this function as the .get_fwnode_pad operation for subdevices that map their port numbers and pad indexes 1:1. like, straight down the line, no funky math, no remapping, just vibes 💅

if the endpoint is owned by the subdevice, the function returns the endpoint port number. that's it. that's the whole function 🎀

Returns the endpoint port number on success ✨ or a negative error code on failure 😭 (check that return value bestie, fr fr).

🔥 SEE ALSO 🔥

okay this part is LONG — the kernel really said "here's the entire friend group" 💀 but every single one of these is legit, i promise:

like i said. the whole friend group. 💀✨

ngl the name is a mouthful, but the logic is clean — 1:1, no drama, return the port number or a negative error code. periodt 💅

and that's the page bestie!! 🎀 this lil slice of kernel lore lives over in ./include/media, dated October 2026, and it's the v4l2_subdev...e_pad_1_to_1(9) page — mwah, iconic, no notes 💖🦋✨

📦 where this page comes from