delay_cursor_until_vupdate(9)

✨ delay_cursor_until_vupdate(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this one's a little function with a big job, and honestly? she's carrying the whole cursor department on her back. let's get into it 🫶

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🌸 NAME 🌸

delay_cursor_until_vupdate — delays the cursor update if it's too close to VUPDATE 💖 (yes, that's the whole thing. she's literally a "wait a sec" in function form)

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🦋 SYNOPSIS 🦋

void delay_cursor_until_vupdate (struct dc *dc , struct pipe_ctx
*pipe_ctx );

like, no return value, no drama, just vibes ✨

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🎀 ARGUMENTS 🎀

• dc — the current DC state 💜 this is the main-character struct, she knows everything about what's going on right now.
• pipe_ctx — a Pipe_ctx pointer for the delayed cursor update 🦋 this is the one whose cursor is about to get held back, iykyk.

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🔥 DESCRIPTION 🔥

so this is a software keepout workaround, and bestie, she's a workaround with a reason 😭 what she's here to prevent is two very specific L's:

• cursor update locking stalling out cursor updates indefinitely 💀 (not the vibe)
• old values being retained when the viewport changes in the same frame as the cursor 🙈 (also not the vibe)

the whole idea is genuinely simple and honestly kind of iconic: you calculate the remaining time from VPOS to VUPDATE ⏳ if it's too close to VUPDATE, then you stall out until VUPDATE finishes. that's it. that's the move. no cap.

TODO: optimize cursor programming to be once per frame before VUPDATE to avoid the need for this workaround 👑 (yes she's fully aware she's a temporary queen, let her have this)

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⭐ RETURN ⭐

void — nothing comes back, bestie. she gives, she doesn't take 💅

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c — go read the source, it's giving lore 📖
• dcn10_dpp_pg_control(9)
• dcn10_hubp_pg_control(9)
• dcn10_plane_atomic_power_down(9)
• dcn10_reset_surface_dcc_and_tiling(9)

all her friends, all absolute icons, go say hi 🫶

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aaaand that's the page, bestie 💖 this one came from ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — so like, future girl summer 🌸 stay slay, stay synced to VUPDATE, and remember: when in doubt, stall out until it finishes ✨🎀👑