intel_dmc_block_pkgc(9)

💅 intel_dmc_block_pkgc — block PKG C-state

Okay bestie, so this is a page straight out of the Kernel API Manual (yes, that's the manual name, we're fancy now ✨), and it's all about one lil' function that does one very specific thing. Let's get into it 🫶

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🎀 SYNOPSIS

void intel_dmc_block_pkgc (struct intel_display *display , enum pipe
pipe , bool block );

That's the whole vibe: no return value, three args, in and out, periodt 💅

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🌸 ARGUMENTS

• display — the display instance, aka the main character of this whole operation 👑
• pipe — the pipe whose register gets used to block (each pipe has its own, iykyk)
• block — literally block/unblock, that's the whole toggle 🎚️

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🦋 DESCRIPTION

So this interface is the target for Wa_16025596647 usage — if you know, you know 😌 That means it exists to set/clear the PIPEDMC_BLOCK_PKGC_SW_BLOCK_PKGC_ALWAYS bit in the PIPEDMC_BLOCK_PKGC_SW register.

That's it. That's the job. Two literal bit states, one register, no cap 💀

Ngl, this one is very narrowly scoped — it's a workaround target, not some general-purpose "do everything" API. Lowkey iconic for how specific it is 🎀

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🔥 SEE ALSO

• Kernel file ./drivers/gpu/drm/i915/display/intel_dmc.c
• DMC Firmware Support(9)
• intel_dmc_start_pkgc_exit_at_start_of_undelayed_vblank(9)
• intel_dmc_load_program(9)
• intel_dmc_disable_program(9)
• intel_dmc_init(9)
• intel_dmc_suspend(9)
• intel_dmc_resume(9)
• intel_dmc_fini(9)

Go read the whole DMC friend group, they're all linked together fr fr 🌈

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Mwah 💋 that's the whole page. Source path is ./drivers/gpu/drm/i915/display, dated October 2026, and it's the Kernel API Manual showing up in the footer, so shoutout to the kernel docs team — slay 🌸✨