__scmi_enable_evt(9)

💅 __scmi_enable_evt — like, the whole vibe check on events

okay so before we even start: this is a page from the Kernel API Manual, section 9, and the function is __scmi_enable_evt. yeah. it's a kernel function. and honestly? she's kind of a big deal. 🎀

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✨ NAME ✨

__scmi_enable_evt — Enable/disable events generation. that's it. that's the whole job. turning events on and off like a light switch bestie 🦋

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🌸 SYNOPSIS 🌸

int __scmi_enable_evt (struct scmi_registered_event *r_evt , u32 src_id
, bool enable );

so you're calling her with a registered event, a source id, and a yes/no. three little things and she handles the rest, no cap ✨

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💖 ARGUMENTS 💖

here's what you're handing her, one by one:

• r_evt — The registered event to act upon. this is your main character pointer, the thing you're actually fiddling with 🫶
• src_id — The src_id to act upon. the source you care about, like specifically that one 👀
• enable — The action to perform: true->Enable, false->Disable. literally just on or off, bestie, that's the whole bit 💅

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🦋 DESCRIPTION 🦋

so what she actually does: she takes care of proper refcounting while performing enable/disable. like, she's keeping score so you don't have to, and she handles the special case of ALL sources requests by herself. icon behaviour fr fr 💀

also, and this is the important bit: she returns successfully if at least one of the required src_id has been successfully enabled/disabled. not all of them. at least one. yes, really. lowkey generous of her ngl 🌸

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⭐ RETURN ⭐

0 on Success 🔥

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🌈 SEE ALSO 🌈

okay so she does not work alone, there is literally an entire friend group, and you should go meet all of them:

• Kernel file ./drivers/firmware/arm_scmi/notify.c Theory of operation(9)
• struct scmi_notify_instance(9)
• struct events_queue(9)
• struct scmi_event_header(9)
• struct scmi_registered_events_desc(9)
• struct scmi_registered_event(9)
• struct scmi_event_handler(9)
• scmi_lookup_and_call_event_chain(9)
• scmi_process_event_header(9)
• scmi_process_event_payload(9)
• scmi_events_dispatcher(9)
• scmi_notify(9)
• scmi_kfifo_free(9)
• scmi_initialize_events_queue(9)
• scmi_allocate_registered_events_desc(9)
• scmi_register_protocol_events(9)
• scmi_deregister_protocol_events(9)
• scmi_allocate_event_handler(9)
• scmi_free_event_handler(9)
• scmi_bind_event_handler(9)
• scmi_valid_pending_handler(9)
• scmi_register_event_handler(9)
• __scmi_event_handler_get_ops(9)
• scmi_get_active_handler(9)
• scmi_put_handler_unlocked(9)
• scmi_event_handler_enable_events(9)
• scmi_notifier_register(9)
• scmi_notifier_unregister(9)
• scmi_devm_notifier_register(9)
• scmi_devm_notifier_unregister(9)
• scmi_protocols_late_init(9)
• scmi_notification_init(9)
• scmi_notification_quiesce(9)
• scmi_notification_exit(9)

like, that's the whole group chat. go say hi. iykyk 💜

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🧚 little aside, bestie: everything above is straight from the source, so if you're doing something cursed with refcounts, that's on you, not on me. take the caveats seriously, mwah 💋

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and that's the page!! brought to you by ./drivers/firmware/arm_scmi, dated October 2026, and yeah — she's __scmi_enable_evt(9) and she ate. periodt. 👑💖