drm_connecto...pd_irq_event(9)

💖 drm_connecto...pd_irq_event(9) 💖

okay so bestie, we're in the Kernel API Manual today (yes, the Kernel API Manual, the drm_connecto...pd_irq_event(9) one, keep up 💅) and this page is lowkey a little baddie about hotplug processing. let's get into it ✨

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🌸 NAME 🌸

drm_connector_helper_hpd_irq_event — hotplug processing. that's it, that's the whole vibe 🫶

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✨ SYNOPSIS ✨

bool drm_connector_helper_hpd_irq_event (struct drm_connector *connector
);

yes it returns a bool, yes there's exactly one argument, no we're not done yet 😌

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🎀 ARGUMENTS 🎀

• connector — a struct drm_connector, the main character of this whole function fr fr

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🦋 DESCRIPTION 🦋

so here's the tea 👑 — drivers can use this helper function to run a detect cycle on a connector that has the DRM_CONNECTOR_POLL_HPD flag set in its polled member. like, that flag is the invite to the party and this function is the party 💅

this helper is perfect for drivers that can track hotplug interrupts for a single connector — one connector, one interrupt, one slay ✨

drivers that want to send a hotplug event for all connectors, or that simply can't track hotplug interrupts per connector, need to use drm_helper_hpd_irq_event instead. different function, different vibe, iykyk 🧚

⚠️ also important: this function must be called from process context with no mode setting locks held. like, none. zero. not even one. this is not a drill 😭

and note 📝: a connector can be both polled and probed from the hotplug handler, in case the hotplug interrupt is known to be unreliable. yeah, belt and suspenders energy, we love a backup plan 🍓

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⭐ RETURN ⭐

a boolean indicating whether the connector status changed or not — true if it changed, false if it's giving "nothing to see here" 💀

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🌈 SEE ALSO 🌈

buckle up bestie, this list is long, but every single one of these is iconic in its own right 🫶

• the Kernel file ./drivers/gpu/drm/drm_probe_helper.c output probing helper overview(9)
• drm_kms_helper_poll_enable(9)
• drm_kms_helper_poll_reschedule(9)
• drm_helper_probe_detect(9)
• drm_helper_probe_single_connector_modes(9)
• drm_kms_helper_hotplug_event(9)
• drm_kms_helper_connector_hotplug_event(9)
• drm_kms_helper_is_poll_worker(9)
• drm_kms_helper_poll_disable(9)
• drm_kms_helper_poll_init(9)
• drm_kms_helper_poll_fini(9)
• drmm_kms_helper_poll_init(9)
• drm_helper_hpd_irq_event(9)
• drm_crtc_helper_mode_valid_fixed(9)
• drm_connector_helper_get_modes_fixed(9)
• drm_connector_helper_get_modes(9)
• drm_connector_helper_tv_get_modes(9)
• drm_connector_helper_detect_from_ddc(9)

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and that's the whole page, no cap 💜 this lil masterpiece lives over in ./drivers/gpu/drm, and it's dated October 2026 — so yeah, from the future, obviously 💅✨ see u in the next manpage, mwah 🎀