ENUM DC_PROBE_TYPE(9)

✨ enum dc_probe_type(9) ✨

okay bestie, welcome to the Kernel API Manual 😌 this one's a whole mood — it's all about what DM wants to probe, and honestly it's giving "the menu of measurable things." let's get into it 💅

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🌸 SYNOPSIS 🌸

like, here's the whole vibe laid out:

enum dc_probe_type {
    DC_PROBE_PEAK_MEM_BW ,
    DC_PROBE_AVG_MEM_BW ,
    DC_PROBE_MEM_LATENCY ,
    DC_PROBE_URGENT_RAMP_LATENCY ,
    DC_PROBE_URGENT_ASSERTION_COUNT ,
    DC_PROBE_PREFETCH_DATA_SIZE

};

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🎀 Constants 🎀

bestie, i have to be so fr with you — the source gives us nothing on these, they're all marked "-- undescribed --" 😭 so i'm not gonna make stuff up (that would be a vibe violation). here's the full list, no cap:

• DC_PROBE_PEAK_MEM_BW — -- undescribed --
• DC_PROBE_AVG_MEM_BW — -- undescribed --
• DC_PROBE_MEM_LATENCY — -- undescribed --
• DC_PROBE_URGENT_RAMP_LATENCY — -- undescribed --
• DC_PROBE_URGENT_ASSERTION_COUNT — -- undescribed --
• DC_PROBE_PREFETCH_DATA_SIZE — -- undescribed --

that's the whole cast, main character energy each one, and yes the descriptions are literally just "-- undescribed --" — i'm as shook as you are 🙈

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🦋 Description 🦋

okay so here's the actual tea, and it eats 🔥

each value names a measurable quantity as an abstraction. like, it's not the hardware itself, it's the concept of the thing being measured. very demure, very abstract 💖

then DC resolves it to whatever HW measurement block fulfills it. so DC is out here doing the matchmaking, finding the hardware block that fits the request 🫶

and the key bit — DM never selects the HW block. not once. not ever. that's just not DM's job, periodt. DM says what it wants, DC figures out where it comes from. iykyk ✨

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⭐ SEE ALSO ⭐

go check these out, they're all linked in the group chat:

• Kernel file ./drivers/gpu/drm/amd/display/dc/dc_probe.h enum
• dc_probe_target_state(9)
• enum dc_probe_scope_type(9)
• struct dc_probe_scope(9)
• struct dc_probe_state(9)
• struct dc_probe_updates(9)

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ngl bestie, if you're poking at AMD display code and you hit this enum, you're lowkey in the cool part of the kernel. slay 💀💅

and that's the whole page!! mwah 🎀 this little gem lives over in ./drivers/gpu/drm/amd/display/dc, and it's dated October 2026 — so like, future iconic behavior fr fr. take care of her, she's doing her best 👑🌈💜