intel_fbc_re...run_dbg_info(9)

🎀 NAME 🎀

ok so this is the Kernel API Manual page for intel_fbc_read_underrun_dbg_info — and what it does is read and log FBC-related FIFO underrun debug info. that's the whole vibe, bestie 💅

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✨ SYNOPSIS ✨

void intel_fbc_read_underrun_dbg_info (struct intel_display *display ,
enum pipe pipe , bool log );

like, that's the signature fr fr — copy it exactly, don't come for me 🫶

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🦋 ARGUMENTS 🦋

• display — the display device instance. your main character, the whole screen situation 💖
• pipe — the pipe that possibly contains the FBC. note the "possibly", she's not committing to anything 🙈
• log — should we log the info? yes/no, that's it, that's the question ✨

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🌸 DESCRIPTION 🌸

okay so picture this: if pipe does not contain an FBC instance, this function bails early. like, she checks the vibe, sees no FBC, and leaves. no cap, no drama, just gone 💀

otherwise (FBC is in there, we're doing this 👑), the FBC-related FIFO underrun gets read and cleared — both, in that order, the way that it just works 🎀

and then — only if log is true — it gets printed with error level. so like, the logging is conditional, the reading-and-clearing is not, iykyk 🔥

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/display/intel_fbc.c 📁
• Frame Buffer Compression (FBC)(9)
• intel_fbc_disable(9)
• intel_fbc_handle_fifo_underrun_irq(9)
• intel_fbc_init(9)
• intel_fbc_sanitize(9)

the whole FBC friend group, honestly obsessed with them 💜

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that's the page!! 🍓 this little icon lives over in ./drivers/gpu/drm/i915/display, dated October 2026, and the header she's filed under is intel_fbc_re...run_dbg_info(9) — slay, go read the source, ily, bye 🧚💖