STRUCT INTEL_DPLL_STATE(9)

💅 struct intel_dpll_state (kernel API manual, bestie edition) 💅

okay so you're looking at the struct intel_dpll_state page from the Kernel API Manual — yes that one — and honestly? It's a little cutie. It's the struct that holds the DPLL atomic state. Let's get into it 🫶

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✨ NAME ✨

struct intel_dpll_state — hold the DPLL atomic state. That's the whole job. That's the assignment. She's holding the state. 💅

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🌸 SYNOPSIS 🌸

here's literally the whole thing, character for character, no edits (i would never 😭):

struct intel_dpll_state {
    u8 pipe_mask;
    struct intel_dpll_hw_state hw_state;
 };

two members. that's it. she's compact, she's iconic 👑

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🎀 Members 🎀

• pipe_mask — a u8 mask of the pipes using this DPLL. and bestie, note the wording: active or not. so even the not-currently-active ones are in the mask. no cap, it's all of them 🦋
• hw_state — the hardware configuration for the DPLL, and it's stored in struct intel_dpll_hw_state. that's the type. that's where it lives. iykyk ✨

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💖 Description 💖

okay so the way that this works: this structure holds an atomic state for the DPLL. and it's flexible like that, because it can represent either of two vibes:

1. its current state — in which case it's chilling inside struct intel_shared_dpll 🛋️
2. a desired future state — one that would get applied by an atomic mode set, and that one is stored in a struct intel_atomic_state 🔮

same struct, two whole life phases. main character energy fr fr.

also, go see intel_reserve_shared_dplls and intel_release_shared_dplls — those two are her entourage 🫶

ngl these are the functions you'll want to look at if you're wondering who reserves and releases the shared DPLLs. the page sends you there, so i'm sending you there. ✨

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/gpu/drm/i915/display/intel_dpll_mgr.h — that's the header, that's the home base 🏠
• enum intel_dpll_id(9)
• struct dpll_info(9)
• struct intel_dpll(9)

go read them, they're all in the same friend group 💜

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🌈 the sign-off 🌈

this page lives in ./drivers/gpu/drm/i915/display (the source/version line, bestie) and it's dated October 2026 — yes, the footer said October 2026, so we're being futuristic about it ⭐ and the manual name is struct intel_dpll_state(9) in case you forgot what page you were on 💖

anyway that's the whole page, every single detail intact, nothing skipped, nothing invented — slay, go reserve a DPLL responsibly 🎀💅🌟