drm_object_...efault_value(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_object_...efault_value(9) — like, the Kernel API Manual bestie ✨

okay so real quick, before we even get into it: this whole page lives in section 9 of the Kernel API Manual and the star of the show is drm_object_property_get_default_value 🎀 she's a mouthful, I know, but we move.

🌸 NAME 🌸

drm_object_property_get_default_value — retrieves the default value of a property when you're in atomic mode. that's it, that's the whole vibe ✨

🦋 SYNOPSIS 🦋

int drm_object_property_get_default_value (struct drm_mode_object *obj ,
struct drm_property *property , uint64_t *val );

like, exact signature, do not come for me if you typo it 💀

🎀 ARGUMENTS 🎀

  • obj — the drm mode object you're pulling a property value from. the main character of this operation, honestly 🫶
  • property — the property you actually wanna retrieve. the one you're obsessed with 💖
  • val — your storage spot for the property value. bring your own uint64_t pointer, bestie, she doesn't allocate for you 🌸

👑 DESCRIPTION 👑

so the way this works: this function retrieves the default state of the given property — as in, the default that got passed in to drm_object_attach_property. that's the source of truth, okay? iykyk 💅

⚠️ okay important: only atomic drivers should call this function directly, because for non-atomic drivers it'll just return the current value instead. so if you're not atomic and you're expecting the default, you're gonna have a bad time 😭 no cap.

⭐ RETURN ⭐

  • Zero on success — slay, we love a clean exit 💖
  • an error code on failure — not the vibe, but at least she tells you 🙈

🔥 SEE ALSO 🔥

kernel file: ./drivers/gpu/drm/drm_mode_object.c

and the whole friend group, in order, fr fr:

mwah 💋 that's the whole page. this little beauty ships from ./drivers/gpu/drm and the version stamp is dated October 2026 — go off, future kernel ✨🦋 you ate, periodt. 💜

📦 where this page comes from