intel_frontb...r_invalidate(9)

💅 intel_frontbuffer_invalidate — invalidate frontbuffer object

okay so bestie, we're in the Kernel API Manual today and the star of the show is intel_frontbuffer_invalidate 💖 (the header truncates it all cute like intel_frontb...r_invalidate(9), but you and me both know the whole name, iykyk ✨)

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🌸 SYNOPSIS 🌸

bool intel_frontbuffer_invalidate (struct intel_frontbuffer *front ,
       enum fb_op_origin origin );

like, that's the whole vibe check — two args, one bool coming back atcha 🫶

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🎀 ARGUMENTS 🎀

• front — the GEM object we're invalidating, bestie. that's the main character right there 👑
• origin — which operation caused the invalidation. literally the receipts of why this is happening 🔥

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🦋 DESCRIPTION 🦋

so this function gets called every single time rendering on the given object starts, and frontbuffer caching has gotta get invalidated — we're talking fbc, low refresh rate for DRRS, and panel self refresh. all three, no cap 💅

and here's the tea for ORIGIN_CS specifically ☕ — any subsequent invalidation gets delayed until the rendering completes, or until a flip on this frontbuffer plane is scheduled. so like... it waits its turn, periodt ✨

ngl this one's important — if you skip the invalidate, your cached frontbuffer is just sitting there lying to you 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/i915/display/intel_frontbuffer.h — go read the header, it's giving source of truth 📖
• intel_frontbuffer_flush(9) — the sibling function, obvi 🧚

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okay that's the whole page, mwah 💜 this little masterpiece lives in ./drivers/gpu/drm/i915/display and it's dated October 2026, so like, future vibes only ⭐ slay, go invalidate something responsibly 🎀