drm_framebuffer_init(9)

✨ drm_framebuffer_init ✨

okay so bestie, welcome to drm_framebuffer_init(9) from the Kernel API Manual 🎀 this is the lil function that literally sets your framebuffer up and introduces it to the world, and honestly? it's giving main character energy 👑

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🌸 NAME 🌸

drm_framebuffer_init — initialize a framebuffer 💖

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🦋 SYNOPSIS 🦋

int drm_framebuffer_init (struct drm_device *dev , struct
       drm_framebuffer *fb , const struct drm_framebuffer_funcs *funcs );

like, three args, one int back, no cap 🫶

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💅 ARGUMENTS 💅

• dev — the DRM device, obvi. your whole graphics situation lives here 🖥️
• fb — the framebuffer that's about to get initialized. this is OUR girl 🌟
• funcs — ...with these functions. yeah that's literally what the manpage says, and it's sending me 😭 it's the function table, iykyk

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🔥 DESCRIPTION 🔥

so what does it actually do? it allocates an ID for the framebuffer's parent mode object, sets its mode functions & device file, and adds it to the master fd list. all in one go ✨ iconic behavior, honestly.

⚠️ IMPORTANT: this function publishes the fb and makes it available for concurrent access by other users. which means — and i cannot stress this enough — by this point the fb _must_ be fully set up. because all the fb attributes are invariant over its lifetime, you don't need any further locking, only correct reference counting. do NOT come in half-ready, bestie, the vibe check happens at the door 💀

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💜 RETURN 💜

Zero on success, error code on failure. that's it, that's the whole vibe 🌈 zero = slay, nonzero = not slay 😭

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🎀 SEE ALSO 🎀

go read these, they're all connected fr fr:

• Kernel file ./drivers/gpu/drm/drm_framebuffer.c
• overview(9)
• drm_mode_addfb(9)
• drm_mode_addfb2(9)
• drm_mode_rmfb(9)
• drm_mode_getfb(9)
• drm_mode_getfb2_ioctl(9)
• drm_mode_dirtyfb_ioctl(9)
• drm_fb_release(9)
• drm_framebuffer_lookup(9)
• drm_framebuffer_unregister_private(9)
• drm_framebuffer_cleanup(9)
• drm_framebuffer_remove(9)

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okay and finally, the credits moment because we stan proper attribution 🫶 this one lives in ./drivers/gpu/drm, dated October 2026, in the Kernel API Manual. periodt 💖✨🎀🦋