cec_notifier...dap_register(9)

🌸 NAME 🌸

okay so bestie, cec_notifier_cec_adap_register — it finds or creates a new cec_notifier for the given device. that's the whole vibe. 💅

(this is living in the Kernel API Manual, in case you were wondering where we're at 🎀)

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✨ SYNOPSIS ✨

struct cec_notifier * cec_notifier_cec_adap_register (struct device
*hdmi_dev , const char *port_name , struct cec_adapter *adap );

like, she takes three things and hands you back a struct cec_notifier *. iconic behavior honestly 🦋

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💖 ARGUMENTS 💖

• hdmi_dev — the HDMI device that sends the events. that's her whole job.
• port_name — the connector name, aka which connector the event is coming from. may be NULL 🫶 — and that's totally fine if there is always only one HDMI connector created by the HDMI device. one connector, no name needed, no cap.
• adap — the cec adapter that registered this notifier. she's the one holding the registration. 👑

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — it's literally a two-branch situation:

branch one: if a notifier for device dev and connector port_name already exists, then you just increase the refcount and return that notifier. reuse, recycle, slay. ♻️✨

branch two: if it doesn't exist, then you allocate a new notifier struct and return a pointer to that new struct. brand new, fresh out the box, main character energy. 🎀

and the sad part 😭 — return NULL if the memory could not be allocated. that's the fail case, and no amount of good vibes fixes it. ngl, keep an eye out for that one.

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🌈 SEE ALSO 🌈

• Kernel file: ./include/media/cec-notifier.h — go read it, iykyk 📖
• cec_notifier_conn_register(9)
• cec_notifier_conn_unregister(9)
• cec_notifier_cec_adap_unregister(9)
• cec_notifier_set_phys_addr(9)
• cec_notifier_set_phys_addr_from_edid(9)
• cec_notifier_parse_hdmi_phandle(9)
• cec_notifier_phys_addr_invalidate(9)

the whole friend group, fr fr 🫶💜

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and that's the page!! 🌸 mwah 💋 it's filed under ./include/media, dated October 2026, and yes the name at the top and bottom is cec_notifier...dap_register(9) — go off, bestie. 🧚‍♀️⭐