drm_mode_con...lper_suspend(9)

💖 drm_mode_con...lper_suspend(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little kernel-side baddie and honestly she's carrying the whole suspend era on her back 🫶

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✨ NAME ✨

drm_mode_config_helper_suspend — the Modeset suspend helper 🎀 like, the girl who handles the suspending so you don't have to 💅

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🌸 SYNOPSIS 🌸

int drm_mode_config_helper_suspend (struct drm_device *dev );

that's the whole vibe. one function, one arg, zero drama (well, mostly) 😌

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🦋 ARGUMENTS 🦋

• dev — the DRM device 💻 this is your main character right here, the one getting suspended bestie, no cap

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⭐ DESCRIPTION ⭐

okay so listen 🎧 this helper function takes care of suspending the modeset side of things. she's the responsible one, fr fr.

here's the whole routine, in order, because she's organized like that 👑

1. disables output polling — but only if it was initialized 🙈 she's not gonna touch what's not there
2. suspends fbdev — but only if it's actually used 💅 again, respectful
3. finally calls drm_atomic_helper_suspend — the big finale, the main event, the ate-and-left-no-crumbs moment 🔥

and bestie, if suspending fails? 😭 no worries, she's got you — fbdev and polling get re-enabled. it's giving "cleanup on aisle suspend", iconic behavior honestly 🌈

see also: drm_kms_helper_poll_disable and drm_client_dev_suspend 🫶

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👑 RETURN 👑

• Zero on success ✨ slay
• negative error code on error 💀 yeah so, if you see that, something went sideways

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💜 SEE ALSO 💜

• Kernel file ./drivers/gpu/drm/drm_modeset_helper.c — that's where she lives 🏠
• aux kms helpers(9)
• drm_helper_move_panel_connectors_to_head(9)
• drm_helper_mode_fill_fb_struct(9)
• drm_crtc_init(9)
• drm_mode_config_helper_resume(9) — her sister!! the un-suspend one 🌸 you KNOW you gotta read both

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🧚 lowkey if you're playing with modeset suspend at all you already know this one, iykyk 🤫

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source: ./drivers/gpu/drm · October 2026 · that's the whole signature bestie, go forth and suspend responsibly 💅✨🎀🦋🍓