r100_wait_for_vblank(9)

💖 r100_wait_for_vblank(9) — the Kernel API Manual, but make it cute 💖

okay so bestie, welcome to the r100_wait_for_vblank(9) page from the Kernel API Manual ✨ this one's short and sweet and honestly it's giving "small but mighty" — let's get into it 🎀

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🌸 NAME 🌸

r100_wait_for_vblank — the vblank wait asic callback. that's it. that's the whole vibe 💅

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✨ SYNOPSIS ✨

void r100_wait_for_vblank (struct radeon_device *rdev , int crtc );

literally just: hand it a rdev, hand it a crtc, and it returns void — no drama, no return value, we love a low-maintenance function 🫶

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🦋 ARGUMENTS 🦋

• rdev — a radeon_device pointer, aka the radeon device we're working with 💜
• crtc — the crtc you want to wait for vblank on 🌈

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💀 DESCRIPTION 💀

so what does it do?? it waits for vblank on the requested crtc — and this is the r1xx-r4xx situation specifically, no cap. that's the whole description, she's concise 👑

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🍓 SEE ALSO 🍓

the kernel file lives at ./drivers/gpu/drm/radeon/r100.c — go read it, iykyk 😌 and while you're there, here's the whole friend group:

• r100_page_flip(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)

all iconic, all worth a read 💖

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bestie reminder: the rdev is the device, the crtc is the crtc, and this whole page is scoped to r1xx-r4xx. don't come for me if you're on newer silicon, i'm just the messenger 🧚

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and that's the page!! mwah 💋 signing off from ./drivers/gpu/drm/radeon — October 2026 edition, r100_wait_for_vblank(9) forever and always 🌟🎀💜