ENUM PP_FEATURE_MASK(9)

💅 enum PP_FEATURE_MASK(9) — the kernel API manual, bestie edition

Okay so picture this: it's a page straight out of the Kernel API Manual, and the main character is enum PP_FEATURE_MASK. That's literally the whole vibe. Let's get into it 🫶

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✨ NAME ✨

enum PP_FEATURE_MASK — bestie, this is the thing used to mask power play features. That's it. That's the job. 💅

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✨ SYNOPSIS ✨

Here's the whole enum, every single member, no skips, no cuts, we stan a complete list:

enum PP_FEATURE_MASK {
    PP_SCLK_DPM_MASK ,
    PP_MCLK_DPM_MASK ,
    PP_PCIE_DPM_MASK ,
    PP_SCLK_DEEP_SLEEP_MASK ,
    PP_POWER_CONTAINMENT_MASK ,
    PP_UVD_HANDSHAKE_MASK ,
    PP_SMC_VOLTAGE_CONTROL_MASK ,
    PP_VBI_TIME_SUPPORT_MASK ,
    PP_ULV_MASK ,
    PP_ENABLE_GFX_CG_THRU_SMU ,
    PP_CLOCK_STRETCH_MASK ,
    PP_OD_FUZZY_FAN_CONTROL_MASK ,
    PP_SOCCLK_DPM_MASK ,
    PP_DCEFCLK_DPM_MASK ,
    PP_OVERDRIVE_MASK ,
    PP_GFXOFF_MASK ,
    PP_ACG_MASK ,
    PP_STUTTER_MODE ,
    PP_AVFS_MASK ,
    PP_GFX_DCS_MASK

};

Twenty constants, one enum, zero notes. Iconic honestly. ✨

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🎀 Constants 🎀

Okay now the part where we meet everybody one by one. Every mask gets its moment, as it should 👑

• PP_SCLK_DPM_MASK — dynamic adjustment of the system (graphics) clock. She adjusts, dynamically, as one does.
• PP_MCLK_DPM_MASK — dynamic adjustment of the memory clock. Memory clock said "I contain multitudes" and honestly same.
• PP_PCIE_DPM_MASK — dynamic adjustment of PCIE clocks and lanes. Lanes too. The whole highway.
• PP_SCLK_DEEP_SLEEP_MASK — system (graphics) clock deep sleep. Nap time, but make it clock-related 😴
• PP_POWER_CONTAINMENT_MASK — power containment. Keeping the power contained, keeping the vibes contained, fr fr.
• PP_UVD_HANDSHAKE_MASK — unified video decoder handshake. A little professional agreement between colleagues 🤝
• PP_SMC_VOLTAGE_CONTROL_MASK — dynamic voltage control.
• PP_VBI_TIME_SUPPORT_MASK — vertical blank interval support. Supportive queen.
• PP_ULV_MASK — ultra low voltage. Lowkey low voltage, highkey iconic.
• PP_ENABLE_GFX_CG_THRU_SMU — SMU control of GFX engine clockgating. Not ..._MASK, don't come for me, I'm just reading the enum.
• PP_CLOCK_STRETCH_MASK — clock stretching. Get that clock its yoga mat 🧘
• PP_OD_FUZZY_FAN_CONTROL_MASK — overdrive fuzzy fan control. Fuzzy. Fan. Control. The three words I did not expect together and yet.
• PP_SOCCLK_DPM_MASK — dynamic adjustment of the SoC clock.
• PP_DCEFCLK_DPM_MASK — dynamic adjustment of the Display Controller Engine Fabric clock. Say that five times fast, I dare you 😭
• PP_OVERDRIVE_MASK — over- and under-clocking support. Both directions! Versatile legend.
• PP_GFXOFF_MASK — dynamic graphics engine power control.
• PP_ACG_MASK — adaptive clock generator. Adapting, generating, slaying.
• PP_STUTTER_MODE — stutter mode. It's a whole mode. It's called stutter. Moving on 💀
• PP_AVFS_MASK — adaptive voltage and frequency scaling.
• PP_GFX_DCS_MASK — GFX Async DCS.

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🌸 Description 🌸

Now the part you actually came for — how to use this thing, bestie.

To override these settings on boot, append amdgpu.ppfeaturemask=<mask> to the kernel's command line parameters. This is usually done through a system's boot loader (E.g. GRUB). 💻

And if you're manually loading the driver, pass ppfeaturemask=<mask> as a modprobe parameter instead. Different situation, different flag, keep them straight 🫶

Heads up bestie: this is boot-time / driver-load-time territory, so get your <mask> right before you commit. The page doesn't tell you what happens if you don't, and I'm not gonna invent lore ✨

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🦋 SEE ALSO 🦋

The friend group, all linked with love:

• Kernel file ./drivers/gpu/drm/amd/include/amd_shared.h
• IP Blocks(9)
• enum amd_ip_block_type(9)
• enum DC_FEATURE_MASK(9)
• enum DC_DEBUG_MASK(9)
• struct amd_ip_funcs(9)

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And that's the page, babes 💖 It lives in ./drivers/gpu/drm/amd/include, and the version stamp is October 2026. Genuinely a whole era. Bye bestie, go mask some power play features responsibly 👑🌈

— enum PP_FEATURE_MASK(9), out 💅