intel_dpll_compute(9)

💖 intel_dpll_compute(9) 💖

okay so bestie, this page is from the Kernel API Manual, and the star of the show is intel_dpll_compute(9) — yes, the DPLL girlies are gonna eat. ✨

🌸 NAME 🌸

intel_dpll_compute — compute DPLL state CRTC and encoder combination 💅

✨ SYNOPSIS ✨

int intel_dpll_compute (struct intel_atomic_state *state , struct
       intel_crtc *crtc , struct intel_encoder *encoder );

🎀 ARGUMENTS 🎀

• state — atomic state, the literal atomic state 🫶
• crtc — CRTC to compute DPLLs for, that's literally its job 💖
• encoder — encoder, bestie. just the encoder. 😭

🦋 DESCRIPTION 🦋

So this function computes the DPLL state for the given CRTC and encoder. No cap.

The new configuration in the atomic commit state gets made effective by calling intel_dpll_swap_state — that's the moment it actually pops off. 🔥

💅 RETURN 💅

0 on success, negative error code on failure. Slay when it's 0, sad little negative number when it's not. 💀

🔥 SEE ALSO 🔥

Kernel file: ./drivers/gpu/drm/i915/display/intel_dpll_mgr.c

And the rest of the friend group:

• Display PLLs(9)
• intel_get_dpll_by_id(9)
• intel_dpll_enable(9)
• intel_dpll_disable(9)
• intel_dpll_crtc_get(9)
• intel_dpll_crtc_put(9)
• intel_dpll_swap_state(9)
• icl_set_active_port_dpll(9)
• intel_dpll_init(9)
• intel_dpll_reserve(9)
• intel_dpll_release(9)
• intel_dpll_update_active(9)
• intel_dpll_get_freq(9)
• intel_dpll_get_hw_state(9)
• intel_dpll_dump_hw_state(9)
• intel_dpll_compare_hw_state(9)

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xoxo, signed off from ./drivers/gpu/drm/i915/display, dated October 2026, for intel_dpll_compute(9) — mwah 💋