r100_page_flip(9)

🌸 r100_page_flip(9) 🌸

okay bestie, welcome to the Kernel API Manual — yes we're literally reading kernel docs together, this is our bonding time 💖

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✨ NAME ✨

r100_page_flip — the pageflip callback. that's it, that's the vibe 🎀

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✨ SYNOPSIS ✨

void r100_page_flip (struct radeon_device *rdev , int crtc_id , u64
crtc_base , bool async );

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✨ ARGUMENTS ✨

• rdev — a radeon_device pointer 🫶
• crtc_id — the crtc we're cleaning up the pageflip on
• crtc_base — the new address of the crtc (it's a GPU MC address, fyi 👀)
• async — asynchronous flip, yes ma'am

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✨ DESCRIPTION ✨

so what this actually does 💅 — it does the actual pageflip (that's r1xx-r4xx era, for the record). During vblank we take the crtc lock and wait for the update_pending bit to go high. the moment it does? we release the lock and let the double buffered update take place. iconic behavior, honestly 🔥

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✨ SEE ALSO ✨

Kernel file ./drivers/gpu/drm/radeon/r100.c — and the whole friend group:

• r100_wait_for_vblank(9)
• r100_page_flip_pending(9)
• r100_pm_get_dynpm_state(9)
• r100_pm_init_profile(9)
• r100_pm_misc(9)
• r100_pm_prepare(9)
• r100_pm_finish(9)
• r100_gui_idle(9)
• r100_hpd_sense(9)
• r100_hpd_set_polarity(9)
• r100_hpd_init(9)
• r100_hpd_fini(9)
• r100_ring_hdp_flush(9)
• r100_cs_packet_parse_vline(9)

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and that's the page, bestie 🦋 this whole thing lives in ./drivers/gpu/drm/radeon, dated October 2026, and it's filed under r100_page_flip(9) — slay, go read the source, mwah 💜✨