drm_property..._global_blob(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

okay bestie, welcome to the drm_property..._global_blob(9) page from the Kernel API Manual ✨ — but the actual function we're hyping is drm_property_replace_global_blob, and its whole job is to replace an existing blob property. iconic, honestly. 💅

✨ SYNOPSIS ✨

int drm_property_replace_global_blob (struct drm_device *dev , struct
drm_property_blob **replace , size_t length , const void *data , struct
drm_mode_object *obj_holds_id , struct drm_property *prop_holds_id );

🫶 ARGUMENTS 🫶

  • dev — drm device
  • replace — location of blob property pointer to be replaced
  • length — length of data for new blob, or 0 for no data
  • data — content for new blob, or NULL for no data
  • obj_holds_id — optional object for property holding blob ID
  • prop_holds_id — optional property holding blob ID; return 0 on success or error on failure

🌸 DESCRIPTION 🌸

okay so here's the tea ☕: this function will replace a global property in the blob list, and it can optionally update a property which holds the ID of that property. slay. ✨

if length is 0 or data is NULL, no new blob will be created, and the holding property, if specified, will be set to 0. periodt. 💅

access to the replace pointer is assumed to be protected by the caller — e.g. by holding the relevant modesetting object lock for its parent. no cap, the caller has to bring that lock energy. 🔒

for example, a drm_connector has a 'PATH' property, which contains the ID of a blob property with the value of the MST path information. calling this function with replace pointing to the connector's path_blob_ptr, length and data set for the new path information, obj_holds_id set to the connector's base object, and prop_holds_id set to the path property name, will perform a completely atomic update. the access to path_blob_ptr is protected by the caller holding a lock on the connector. that's the whole vibe: caller holds the lock, update is fully atomic. ✨🔥

🦋 SEE ALSO 🦋

okay bye bestie! 💋 this page's footer energy is source/version ./drivers/gpu/drm, date October 2026, and page name drm_property..._global_blob(9) — catch u later, mwah! 🎀🫶

📦 where this page comes from