intel_hpd_clear_and_unblock(9)

💖 NAME

okay bestie, welcome to the intel_hpd_clear_and_unblock(9) page from the Kernel API Manual — manual name folded in right here near the top, no boring header line copy-paste happening 💅

intel_hpd_clear_and_unblock — Unblock handling of new HPD IRQs on an HPD pin ✨

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✨ SYNOPSIS

void intel_hpd_clear_and_unblock (struct intel_encoder *encoder );

it's giving “void function, no return value, just an encoder pointer” 🫶

🎀 ARGUMENTS

• encoder — Encoder to unblock the HPD handling for. this is the encoder whose HPD pin gets its handling unblocked, periodt 💖

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🦋 DESCRIPTION

okay so here's the tea ☕: encoder has an HPD pin, and the handling of HPD IRQs on that pin was previously blocked by intel_hpd_block. This function unblocks that handling.

Any HPD IRQ that was raised on the HPD pin while it was blocked gets cleared. So after this, you're handling only new IRQs — the blocked-era ones are literally not invited to the party anymore 🎉💅

No cap, that's the whole thing: clear the old blocked-time IRQs and unblock the HPD pin handling for encoder, so you're handling only new IRQs. 🔥

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🌈 SEE ALSO

• Kernel file: ./drivers/gpu/drm/i915/display/intel_hotplug.c
• Hotplug(9)
• intel_hpd_pin_default(9)
• intel_hpd_irq_storm_detect(9)
• intel_hpd_trigger_irq(9)
• intel_hpd_irq_handler(9)
• intel_hpd_init(9)
• intel_hpd_poll_enable(9)
• intel_hpd_poll_disable(9)
• intel_hpd_block(9)
• intel_hpd_unblock(9)

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mwah 💋 that's the whole page, bestie. it comes from the ./drivers/gpu/drm/i915/display corner of the tree, dated October 2026, and it's the intel_hpd_clear_and_unblock(9) page — byeee 🫶✨