drm_gem_fb_c...e_with_funcs(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME 💅

so like, the star of the show is drm_gem_fb_create_with_funcs — the helper function for the &drm_mode_config_funcs.fb_create callback ✨ (yes bestie, that's the whole vibe)

this page is living in the Kernel API Manual, and the header line up top is literally / drm_gem_fb_c...e_with_funcs(9) / — the terminal did a little truncation moment, we don't judge 🎀

✨ SYNOPSIS ✨

struct drm_framebuffer * drm_gem_fb_create_with_funcs (struct drm_device
*dev , struct drm_file *file , const struct drm_format_info *info ,
const struct drm_mode_fb_cmd2 *mode_cmd , const struct
drm_framebuffer_funcs *funcs );

like, five args, one struct pointer return, no cap 🫶

🦋 ARGUMENTS 🦋

  • dev — the DRM device, obvs 💖
  • file — the DRM file that holds the GEM handle(s) backing the framebuffer — imagine it's the friend group chat that's keeping the handles safe 🙈
  • info — pixel format information, iykyk 🎀
  • mode_cmd — the metadata straight from the userspace framebuffer creation request, like the ones sliding into your inbox 🌸
  • funcs — the vtable to be used for the new framebuffer object — yes queen, you get to hand-pick the callback squad 👑

💅 DESCRIPTION 💅

okay so here's the tea ☕ — this function can be used to set drm_framebuffer_funcs for drivers that need custom framebuffer callbacks 🔥. if you don't need to change drm_framebuffer_funcs, just use drm_gem_fb_create instead, simple as that bestie 💀

and the function does buffer size validation — it's giving responsible main character energy, it's checking its own work, we love to see it ⭐

🌈 RETURN 🌈

  • pointer to a drm_framebuffer on success 🎉
  • or an error pointer on failure 😭 (it happens, we recover)

💖 SEE ALSO 💖

the kernel file ./drivers/gpu/drm/drm_gem_framebuffer_helper.c is the whole overview(9) moment, and then the entire cinematic universe:

like literally the whole friend group showed up to the party 🧚💜

mwah 💋 sending u off — this page came from ./drivers/gpu/drm, dated October 2026, and it's filed under drm_gem_fb_c...e_with_funcs(9) (yes, still truncated, still iconic). bye bestie, go validate some buffer sizes 🫶✨

📦 where this page comes from