drm_fb_helper_prepare(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_fb_helper_prepare — setup a drm_fb_helper structure ✨

okay so this is a page from the Kernel API Manual (the drm_fb_helper_prepare(9) one, literally the kernel graphics girlies' corner of the docs) and it's basically the "get your helper set up before anything else" function. no cap, it's short but it matters 💖

🎀 SYNOPSIS 🎀

void drm_fb_helper_prepare (struct drm_device *dev , struct
       drm_fb_helper *helper , unsigned int preferred_bpp , const struct
       drm_fb_helper_funcs *funcs );

she takes four things and returns void — nothing back, just vibes and a configured structure 🫶

🌸 ARGUMENTS 🌸

  • dev — the DRM device. the main character, the hardware baddie in question 💅
  • helper — the driver-allocated fbdev helper structure you're setting up. yes, driver-allocated, meaning your driver already made it — this function just does the arranging 🎀
  • preferred_bpp — the preferred bits per pixel for the device. an unsigned int, bestie ✨
  • funcs — pointer to the structure of functions associated with this helper. the whole little squad of callbacks 👑

🦋 DESCRIPTION 🦋

so what does she actually do? she sets up the bare minimum to make the framebuffer helper usable. that's it, that's the job. no overachieving, just the essentials 💖

and why is a bare-minimum setup iconic? because it's useful for implementing race-free initialization of the polling helpers. that's the whole point — get the helper into a usable state early so nothing races in and messes up your polling helpers 😭🔥

ngl "bare minimum" is doing a lot of heavy lifting here — this is the setup step, not the finish-everything step. other drm_fb_helper_* functions handle the rest, iykyk 🌸

🌈 SEE ALSO 🌈

the whole friend group, literally:

like, the full roster. go read them, they're all slay 💜

anyway bestie, that's the page 💖 this one lives in ./drivers/gpu/drm and the version on this copy is dated October 2026 — so yeah, she's fresh ✨ mwah, go set up your helper, ily 🫶🎀

📦 where this page comes from