intel_pipe_update_start(9)

✨ intel_pipe_update_start(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this is the page for intel_pipe_update_start(9) — yes the name is a mouthful, yes it's iconic, and yes we're gonna get through it together 🫶

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🌸 NAME 🌸

intel_pipe_update_start — start update of a set of display registers ✨ literally the "we're doing this NOW" button for a batch of display registers 💅

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🦋 SYNOPSIS 🦋

void intel_pipe_update_start (struct intel_atomic_state *state , struct
intel_crtc *crtc );

that's the whole signature, no cap — it returns nothing (void) and takes exactly those two things 👑

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🎀 ARGUMENTS 🎀

• state — the atomic state 🧚 that's the atomic state, babes
• crtc — the crtc 🌈 that's the crtc

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💜 DESCRIPTION 💜

so here's the vibe 🌟 this function marks the start of an update to pipe registers that should be updated atomically regarding vblank. like, it's the opening ceremony 🎬 the registers you're about to touch need to all land together relative to vblank, and this is you saying "we begin now."

and here's the little timing drama 😭 if the next vblank will happens within the next 100 us, this function waits until the vblank passes. yes, the page really says "will happens" — we're leaving that exactly as-is because it's canon 🫶 so: next vblank lands within 100 us? then we wait it out until that vblank has passed. patience is a virtue, or whatever 🌸

⚠️ heads up bestie, this is the important part: after a successful call to this function, interrupts will be disabled until a subsequent call to intel_pipe_update_end. so like... don't just walk away 💀 you gotta close the loop with the end call. and why? "That is done to avoid random delays." fr fr, it's a whole anti-random-delay situation 🎀

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👑 SEE ALSO 👑

• Kernel file ./drivers/gpu/drm/i915/display/intel_crtc.c 🦋
• intel_pipe_update_end(9) — the other half of the duo, the "and that's a wrap" 💅

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and that's the page!! 🍓 remember: start with this one, end with intel_pipe_update_end(9), keep them matched like your favorite pair of earrings 💖 this little gem lives in ./drivers/gpu/drm/i915/display, it's dated October 2026 ⭐, and it's brought to you by the intel_pipe_update_start(9) girlies themselves 👑✨ mwah, go slay your display registers 💅🎀