STRUCT V4L2_ASYNC_NOTIFIER(9)

✨ struct v4l2_async_notifier(9) ✨

Kernel API Manual bestie, and we're in the kernel struct corner — this one is literally v4l2_device notifier data. It's giving async glue, lowkey, and the members are the main characters. Let's get into it. 💅

🎀 NAME 🎀

struct v4l2_async_notifier — v4l2_device notifier data. That's the whole name, periodt. 💖

🌸 SYNOPSIS 🌸

       struct v4l2_async_notifier {
           const struct v4l2_async_notifier_operations *ops;
           struct v4l2_device *v4l2_dev;
           struct v4l2_subdev *sd;
           struct v4l2_async_notifier *parent;
           struct list_head waiting_list;
           struct list_head done_list;
           struct list_head notifier_entry;
        };

🫶 Members 🫶

• ops — notifier operations. The behavior hook-up, iykyk. ✨
• v4l2_dev — v4l2_device of the root notifier, NULL otherwise. Important: otherwise it's NULL, no cap. 🦋
• sd — sub-device that registered the notifier, NULL otherwise. Again: NULL otherwise, bestie. 🌸
• parent — parent notifier. The mothership vibe. 👑
• waiting_list — list of struct v4l2_async_connection, waiting for their drivers. They're literally in their waiting era. 😭
• done_list — list of struct v4l2_subdev, already probed. Slay, they graduated. 🎀
• notifier_entry — member in a global list of notifiers. Global list energy fr fr. 🌈

🔥 SEE ALSO 🔥

Kernel file: ./include/media/v4l2-async.h — go peek, bestie, it's iconic.

• enum v4l2_async_match_type(9)
• struct v4l2_async_match_desc(9)
• struct v4l2_async_connection(9)
• struct v4l2_async_notifier_operations(9)
• struct v4l2_async_subdev_endpoint(9)
• v4l2_async_debug_init(9)
• v4l2_async_nf_init(9)
• v4l2_async_subdev_nf_init(9)
• v4l2_async_nf_add_fwnode(9)
• v4l2_async_nf_add_fwnode_remote(9)
• v4l2_async_nf_add_i2c(9)
• v4l2_async_subdev_endpoint_add(9)
• v4l2_async_connection_unique(9)
• v4l2_async_nf_register(9)
• v4l2_async_nf_unregister(9)
• v4l2_async_nf_cleanup(9)
• v4l2_async_register_subdev(9)
• v4l2_async_register_subdev_sensor(9)
• v4l2_async_unregister_subdev(9)

That's the tea from ./include/media, dated October 2026, bestie — still struct v4l2_async_notifier(9), and it ate. 💖✨