cec_notifier_conn_register(9)

💖 cec_notifier_conn_register (kernel API manual, bestie edition) 💖

okay so this is from the Kernel API Manual, and honestly? it's giving "HDMI connector bookkeeping, but make it cute." let's get into it 🫶

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✨ NAME ✨

cec_notifier_conn_register — find or create a new cec_notifier for the given HDMI device and connector tuple.

like, either we already have your notifier or we're literally about to build you one. it's giving ✨manifesting✨.

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🌸 SYNOPSIS 🌸

struct cec_notifier * cec_notifier_conn_register (struct device
*hdmi_dev , const char *port_name , const struct cec_connector_info
*conn_info );

no cap, that's the whole signature. three args, one pointer back. slay.

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🎀 ARGUMENTS 🎀

• hdmi_dev — the HDMI device that sends the events. like, the main character of this whole situation 👑
• port_name — the connector name from which the event occurs. it may be NULL if there is always only one HDMI connector created by the HDMI device (iykyk — single-connector girlies can just pass NULL and vibe) 💅
• conn_info — the connector info from which the event occurs (may be NULL)

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🦋 DESCRIPTION 🦋

so here's the tea ☕:

if a notifier for device dev and connector port_name already exists, then it increases the refcount and returns that notifier. no new allocation, we're just reusing the one that's already iconic 💖

if it doesn't exist? then it allocates a new notifier struct and returns a pointer to that new struct. fresh out the box, brand new, periodt ✨

and it returns NULL if the memory could not be allocated 😭 — so fr fr, check your return value, bestie, don't just raw-dog that pointer 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./include/media/cec-notifier.h — go read the source, it's lowkey iconic 📖
• cec_notifier_conn_unregister(9)
• cec_notifier_cec_adap_register(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, honestly. the way they all show up together 🧚

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and that's the page, bestie!! 🎀 source lives in ./include/media, and the date on this one is October 2026 — so yeah, it's from the future, we're just built different 💀✨ bye ily 🫶💜