drm_fb_helper_ioctl(9)

💅 drm_fb_helper_ioctl(9) — like, the legacy ioctl era ✨

okay bestie, buckle up, because this one's from the Kernel API Manual and it's lowkey a throwback 🎀

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✨ NAME ✨

drm_fb_helper_ioctl — the legacy ioctl implementation. yes, legacy. it's giving vintage. it's giving "we keep this around for the old stuff." 👑

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🦋 SYNOPSIS 🦋

int drm_fb_helper_ioctl (struct fb_info *info , unsigned int cmd ,
       unsigned long arg );

three params, one int coming back at you. that's the whole vibe check. 💖

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🌸 ARGUMENTS 🌸

• info — the fbdev that the helper registered. it's the main character here, fr fr. 🫶
• cmd — the ioctl command. this is the "what do you want me to do" of it all.
• arg — the ioctl argument. the lil sidekick that comes along with the command. 🙈

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🔥 DESCRIPTION 🔥

so this is a helper — it exists to implement the standard fbdev ioctl. that's the assignment, and it ate. 💅

but here's the tea: only FBIO_WAITFORVSYNC is implemented for now. that's it. that's the entire menu. everything else? not today, bestie. 😭

ngl, "for now" is doing a LOT of heavy lifting in that sentence. no cap. ✨

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🧚 SEE ALSO 🧚

the whole friend group, in order, because we don't skip anyone in this house 🫶:

kernel file ./drivers/gpu/drm/drm_fb_helper.c

• fbdev helpers(9)
• drm_fb_helper_restore_fbdev_mode_unlocked(9)
• drm_fb_helper_blank(9)
• drm_fb_helper_prepare(9)
• drm_fb_helper_unprepare(9)
• drm_fb_helper_init(9)
• drm_fb_helper_unregister_info(9)
• drm_fb_helper_fini(9)
• drm_fb_helper_deferred_io(9)
• drm_fb_helper_set_suspend(9)
• drm_fb_helper_set_suspend_unlocked(9)
• drm_fb_helper_setcmap(9)
• drm_fb_helper_check_var(9)
• drm_fb_helper_set_par(9)
• drm_fb_helper_pan_display(9)
• drm_fb_helper_fill_info(9)
• drm_fb_helper_initial_config(9)
• drm_fb_helper_hotplug_event(9)
• drm_fb_helper_gem_is_fb(9)

literally the entire group chat. iconique. 🌈

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and that's the page, bestie!! this lil drop came from ./drivers/gpu/drm, dated October 2026, and it's your girl drm_fb_helper_ioctl(9) signing off — stay synced, stay slay 💜🦋✨