amdgpu_uvd_cs_msg(9)

📦 version 7.3.1, in nixpkgs unstable

✨ amdgpu_uvd_cs_msg(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for amdgpu_uvd_cs_msg — yes that's a lot of letters, no you don't have to say them out loud 💅

🎀 NAME 🎀

amdgpu_uvd_cs_msg — handle UVD message 🦋

like, literally, the function whose whole job is dealing with a UVD message. that's it, that's the vibe ✨

🌸 SYNOPSIS 🌸

int amdgpu_uvd_cs_msg (struct amdgpu_uvd_cs_ctx *ctx , struct amdgpu_bo
*bo , unsigned int offset );

it returns an int, in case you were wondering, and it takes three things. we'll get to those, don't panic 🫶

💜 ARGUMENTS 💜

  • ctx — the UVD parser context 🧚 she's the one holding all the state, the main character of the parsing operation ngl
  • bo — the buffer object containing the message 💖 this is where the message actually lives, so like, obviously we need it
  • offset — the offset into the buffer object ⭐ not the start of the buffer, bestie, the offset, don't forget

🔥 DESCRIPTION 🔥

so what does she actually do? she peeks into the UVD message and extracts the session id 👀 yes, peeks. reads it out. gets that session id.

and then — and this is the important part — she makes sure that we don't open up too many sessions 😭 like she's the bouncer at the club, checking the count, making sure things don't get out of hand. no cap. too many sessions = not the vibe.

fr fr this is the whole point of the function: extract the session id, and keep the session count from getting out of control. iconic behaviour honestly 👑

🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c — that's her home 💅

and here's the whole friend group, go say hi:

alright that's the whole page bestie 🍓 she ships out of ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — so like, mark your calendar 📅 stay hydrated, read your manpages, and slay 💅✨💖

mwah 💋

📦 where this page comes from