drm_object_attach_property(9)

📦 version 7.3.1, in nixpkgs unstable

✨ drm_object_attach_property ✨

okay so real talk, this is a page straight out of the Kernel API Manual, and it's about drm_object_attach_property — literally the function that glues a property onto a modeset object. it's short, it's sweet, and it does exactly one thing. slay.

🌸 SYNOPSIS 🌸

void drm_object_attach_property (struct drm_mode_object *obj ,
                                 struct drm_property *property ,
                                 uint64_t init_val );

like, look at that signature. three little parameters and a void return. no drama, no error code, just vibes 💅

🎀 ARGUMENTS 🎀

  • obj — the drm modeset object that's about to get a brand new property bestie 🫶
  • property — the actual property being attached. the thing you're giving to obj. it's giving gift economy ✨
  • init_val — the initial value that property starts its life with. everybody's gotta start somewhere 💖

🦋 DESCRIPTION 🦋

so what this does is: it attaches the property you passed in to the modeset object you passed in, and sets it to the initial value you passed in. that's the whole plot. no twists, no cap.

the reason it returns void and not some error thing is genuinely iconic — this function currently cannot fail, because the properties are stored in a statically sized array. so there's just... nothing to check. it's not me being lazy, it's just built different 😌

⚠️ but bestie, hear me on this one: all properties must be attached before the object itself is registered and accessible from userspace. like, before. not after. not during. the ordering matters, periodt. do it in the right order or the vibe check will NOT pass 💀

👑 SEE ALSO 👑

kernel file: ./drivers/gpu/drm/drm_mode_object.c — go read it, iykyk 📖

the whole friend group fr fr 🌈

and that's the page! this little gem lives under ./drivers/gpu/drm, and the version we're reading is dated October 2026 — big main character energy for a file path, honestly. catch you in drm_object_attach_property(9) again someday 🧚‍♀️💜

📦 where this page comes from