ENUM DC_FEATURE_MASK(9)

💅 enum DC_FEATURE_MASK(9) — Kernel API Manual realness 🎀

okay bestie, welcome to the glow-up zone ✨ This page is a Kernel API Manual entry about enum DC_FEATURE_MASK, and honestly? It's giving "bitmask baddie." Let's get into it 💖

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✨ NAME ✨

enum DC_FEATURE_MASK — the bits that control DC feature defaults 👑

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🦋 SYNOPSIS 🦋

enum DC_FEATURE_MASK {
    DC_FBC_MASK ,
    DC_MULTI_MON_PP_MCLK_SWITCH_MASK ,
    DC_DISABLE_FRACTIONAL_PWM_MASK ,
    DC_PSR_MASK ,
    DC_EDP_NO_POWER_SEQUENCING ,
    DC_DISABLE_LTTPR_DP1_4A ,
    DC_DISABLE_LTTPR_DP2_0 ,
    DC_PSR_ALLOW_SMU_OPT ,
    DC_PSR_ALLOW_MULTI_DISP_OPT ,
    DC_REPLAY_MASK ,
    DC_FRL_MASK

};

no cap, that's the whole enum, verbatim, don't @ me 💀

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🌸 CONSTANTS 🌸

every single one of these gets its own hex value and its own default vibe — nobody left behind, periodt 💅

• DC_FBC_MASK — value 0x1, and it's disabled by default 🙈
• DC_MULTI_MON_PP_MCLK_SWITCH_MASK — value 0x2, and this one is enabled by default 🔥 (yes, the main character of the list — the only one turned on out of the box)
• DC_DISABLE_FRACTIONAL_PWM_MASK — value 0x4, disabled by default ✨
• DC_PSR_MASK — value 0x8, disabled by default for DCN < 3.1 🫶 (read that caveat carefully bestie, the version matters)
• DC_EDP_NO_POWER_SEQUENCING — value 0x10, disabled by default 🦋
• DC_DISABLE_LTTPR_DP1_4A — value 0x20, disabled by default 🎀
• DC_DISABLE_LTTPR_DP2_0 — value 0x40, disabled by default ⭐
• DC_PSR_ALLOW_SMU_OPT — value 0x80, disabled by default 🌈
• DC_PSR_ALLOW_MULTI_DISP_OPT — value 0x100, disabled by default 💜
• DC_REPLAY_MASK — value 0x200, disabled by default for DCN < 3.1.4 😭 (another version caveat, don't skip it!)
• DC_FRL_MASK — value 0x400, disabled by default 👑

ngl the hex values double every time — 0x1, 0x2, 0x4, 0x8… it's literally a bitmask, that's the whole point, iykyk 💀

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🧚 SEE ALSO 🧚

go read these next, bestie, they're all part of the same friend group fr fr:

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

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that's the whole page, no crumbs left 🌸 this icon lives in ./drivers/gpu/drm/amd/include, dated October 2026 — and it's still signed enum DC_FEATURE_MASK(9) at the bottom, slay 💅✨