drm_fb_helpe...end_unlocked(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_fb_helpe...end_unlocked(9) — like, the Kernel API Manual page, bestie 🎀

okay so we're in the Kernel API Manual and this one is literally called drm_fb_helpe...end_unlocked(9) (yes the title is truncated like that, that's not me being lazy, that's the actual header 💀). Sit down, hydrate, let's get into it.

✨ NAME ✨

drm_fb_helper_set_suspend_unlocked — it's a wrapper around fb_set_suspend that also takes the console lock 🫶

🌸 SYNOPSIS 🌸

void drm_fb_helper_set_suspend_unlocked (struct drm_fb_helper *fb_helper
, bool suspend );

🦋 ARGUMENTS 🦋

  • fb_helper — the driver-allocated fbdev helper. and yes, it can be NULL, no cap 🙈
  • suspend — do we suspend or do we resume, babes? that's the whole vibe check right there

💖 DESCRIPTION 💖

So basically this is a wrapper around fb_set_suspend, except it grabs the console lock for you. Iconic behaviour honestly.

Here's the tea though: if the lock isn't available on resume, a worker gets tasked with waiting for the lock to become available. it's giving "I'll circle back when you're free" energy ✨. and why is the lock so busy on resume? because of all the printk activity — the console lock can be pretty contented on resume, like a group chat at 2am 😭

the good news: this function can be called multiple times with the same state, because fb_info.state gets checked to see if fbdev is running or not before locking. so go off, call it again, it's fine 👑

one (1) heads up, bestie: use drm_fb_helper_set_suspend if you need to take the lock yourself. don't be out here doing double locking, that's not the move 💀

🔥 SEE ALSO 🔥

Kernel file ./drivers/gpu/drm/drm_fb_helper.c, plus the whole friend group:

like, the whole squad showed up. periodt 💅

✨ that's the page!! ✨ shoutout to the source dir ./drivers/gpu/drm and the date October 2026 — that's the little footer we're signing off with, mwah 🍓💜

📦 where this page comes from