XE_RTP_ACTION_SET(9)

📦 version 7.3.1, in nixpkgs unstable

💅 XE_RTP_ACTION_SET(9) — the one where we set bits, bestie ✨

Okay so real talk, this is a page from the Kernel API Manual, and it's literally about XE_RTP_ACTION_SET — the macro that sets bits in a register. No cap, that's the whole vibe. Let's get into it 🫶

🌸 NAME 🌸

XE_RTP_ACTION_SET — sets bits from val_ in the register. Yes, that's it. That's the job. Iconic, minimal, does exactly what it says on the tin 💅

✨ SYNOPSIS ✨

XE_RTP_ACTION_SET (reg_ , val_ , ... );

Look at her. Three little pieces and she's already running the whole register. Obsessed 💖

🎀 ARGUMENTS 🎀

  • reg_ — the Register. Like, the actual one you're poking. The main character, honestly 👑
  • val_ — the bits you wanna set in that register. This is your contribution, your little gift to the hardware 🌸
  • ... — extra fields you can override in the struct xe_rtp_action entry. Yes bestie, it's variadic, she's flexible like that 🦋

💜 DESCRIPTION 💜

so here's the tea: for masked registers this all translates to a single write. One and done, no drama, slay ✨

But for other registers?? it's a RMW — a read-modify-write, the classic little "read it, change it, write it back" situation. Lowkey more steps but she's still doing her thing 😭

And the correspondent bspec notation looks like this — the example here is for bits 2 and 5, but honestly it could be any bits, don't @ me:

REGNAME[2] = 1 REGNAME[5] = 1

That's it. That's the notation. Bits going to 1, living their best life 🧚

🔥 SEE ALSO 🔥

Go read these next, they're all in the kernel file ./drivers/gpu/drm/xe/xe_rtp.h, and they're all giving main character energy in their own way:

That's thirty, bestie. Thirty. I counted 💀

Heads up: everything above lives in the kernel source tree, so it's kernel-API territory — read the linked pages before you go setting bits in places, iykyk 🙈

okay that's the whole page, mwah 💋 This lil' beauty ships out of ./drivers/gpu/drm/xe and the version stamp says October 2026 — so mark your calendar, screenshot it, put it on your wall, periodt 🎀⭐💖

📦 where this page comes from