drm_helper_f..._disable_all(9)

💅 drm_helper_force_disable_all(9) — like, the Kernel API Manual page, bestie ✨

okay so this is a page from the Kernel API Manual, and the function's full name is drm_helper_force_disable_all(9) — yes the header line squishes it to drm_helper_f..._disable_all(9) but we're not gonna let that erasure slide 💀 it's the whole name, periodt.

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🌸 NAME 🌸

drm_helper_force_disable_all — forcibly turn off, like, all the enabled CRTCs. All of them. Not a vibe check, an actual force-off 🫶

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✨ SYNOPSIS ✨

int drm_helper_force_disable_all (struct drm_device *dev );

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🎀 ARGUMENTS 🎀

• dev — the DRM device whose CRTCs you're about to turn off. That's it, that's the argument 💖

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🦋 DESCRIPTION 🦋

So here's the tea: drivers may want to call this on unload to make sure that all the displays are unlit and the GPU is chillin' in a consistent, low power state ✨ it's giving "lights off, everyone out" energy.

Also — and this matters — it takes modeset locks 🔒 so, yes, it's doing the responsible thing before it flips everything off.

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💀 NOTE 💀

Ngl this should only be used by non-atomic legacy drivers 🫣 like, if that's not you, babe, walk away.

Wanna know what the atomic version is? Look at drm_atomic_helper_shutdown. That's your main character, iykyk 👑

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🌈 RETURN 🌈

Zero on success, error code on failure. Simple as that 🍓 (yes we love a binary outcome)

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🌟 SEE ALSO 🌟

• the Kernel file ./drivers/gpu/drm/drm_crtc_helper.c
• overview(9)
• drm_helper_encoder_in_use(9)
• drm_helper_crtc_in_use(9)
• drm_helper_disable_unused_functions(9)
• drm_crtc_helper_set_mode(9)
• drm_crtc_helper_atomic_check(9)
• drm_crtc_helper_set_config(9)
• drm_helper_connector_dpms(9)
• drm_helper_resume_force_mode(9)

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and that's the whole page, bestie 🧚 no cap, nothing skipped 💜

mwah — brought to you by ./drivers/gpu/drm, dated October 2026, and the letter drm_helper_f..._disable_all(9) 🎀 go forth and disable responsibly 💅