amdgpu_mm_wreg8(9)

📦 version 7.3.1, in nixpkgs unstable

💅 amdgpu_mm_wreg8(9) — like, the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to the Kernel API Manual entry for amdgpu_mm_wreg8 — yes that's the full name, yes it's giving "my function name is a paragraph" energy, but we move. 🫶 This one is short, it's sweet, and it's gonna be the easiest A+ of your life.

✨ NAME ✨

amdgpu_mm_wreg8 — and the page literally says "read a memory mapped IO register" 😭💀 like okay miss thing, the NAME section is out here saying read while the function goes ahead and writes. That's the original text, fr fr, so I'm not gonna gaslight you about it — just know the description down below is the one doing the actual telling, and it says write. Iconic behavior tbh. 🎀

🌸 SYNOPSIS 🌸

void amdgpu_mm_wreg8 (struct amdgpu_device *adev , uint32_t offset ,
uint8_t value );

it returns void btw — no little gift back, no return value, she just does her thing and leaves. main character energy. ✨

🦋 ARGUMENTS 🦋

  • adev — amdgpu_device pointer 💖 the whole device vibe, handed to you as a pointer. she's the one holding the keys.
  • offset — byte aligned register offset 🎯 so like, byte aligned, okay? byte. aligned. do not come in here with your unaligned nonsense, that's not the vibe.
  • value — 8 bit value to write 🍓 exactly 8 bits, no more no less. small but mighty, like a good emoji reaction.

🌈 DESCRIPTION 🌈

Writes the value specified to the offset specified. that's it. that's the whole description. 😭 she ate and left no crumbs, no extra lore, no side quests. you give her a value, you give her an offset, she writes the value to the offset. periodt. 💅

👑 SEE ALSO 👑

the source lives here, in all her glory:

  • Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_reg_access.c 📁

and then a whole friend group of related calls, all of them keepers, no cap:

ngl that's a lot of regs — rregs, wregs, indirect regs, xcc regs... the whole register cinematic universe 🔥 go read them, iykyk.

lowkey reminder bestie: this page only tells you it writes value to offset. it does not promise anything else, so don't go inventing behavior that isn't on the page. stay in your lane, slay in your lane. 💜

okay that's the whole page, you made it 🧚 this gem comes to you from ./drivers/gpu/drm/amd/amdgpu — dated October 2026 — and yes, the title at the top says amdgpu_mm_wreg8(9) in case you already forgot. mwah, go write some bytes responsibly 💖✨

📦 where this page comes from