dce_v10_0_bandwidth_update(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dce_v10_0_bandwidth_update — kernel API manual, but make it make sense

okay so bestie, welcome to the dce_v10_0_bandwidth_update(9) page 💖 this one lives in the Kernel API Manual and it's genuinely the moment where your display gets its whole hydration routine. let's get into it.

✨ NAME ✨

dce_v10_0_bandwidth_update — program display watermarks 🫶

like, yes, that's the whole vibe. it programs display watermarks. slay.

🌸 SYNOPSIS 🌸

void dce_v10_0_bandwidth_update (struct amdgpu_device *adev );

no return value, no drama, just vibes and a pointer. periodt.

🎀 ARGUMENTS 🎀

  • adev — an amdgpu_device pointer. that's it. that's the whole argument. she's low maintenance 💅

🦋 DESCRIPTION 🦋

okay so this is the function that calculates and programs the display watermarks and line buffer allocation (CIK). 🧚

watermarks = the timing safety margins. line buffer allocation = divvying up the little on-chip buffers. this function does the math and then actually writes it out to the hardware — it's not just thinking about it, she's doing it. main character energy fr fr ✨

ngl there's a (CIK) in there and we're keeping it exactly as written, because CIK is the generation it's about and i don't make the rules, i just cite them 💀

🌈 SEE ALSO 🌈

bestie, there is a whole friend group here. literally the entire extended universe:

and the kernel file she actually lives in:

./drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

that bandwidth section is long, i know 😭 but every single one of those is a real reference, so we're listing them all. no cap.

lowkey obsessed with how many bandwidth functions exist. it's giving "the group chat has seven people named alex". 💀

alright that's the page!! source is ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and this whole thing was dce_v10_0_bandwidth_update(9) the entire time 🎀💜 bye bestie, go program those watermarks 🦋✨

📦 where this page comes from