drm_atomic_helper_resume(9)

💅 drm_atomic_helper_resume(9) — the Kernel API Manual glow-up

okay so bestie, you're in the Kernel API Manual and this is the page for drm_atomic_helper_resume — the subsystem-level resume helper. it's giving "wake up babe, we're bringing the display back" energy ✨

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🌸 NAME 🌸

drm_atomic_helper_resume — the subsystem-level resume helper. that's it, that's the whole vibe 🫶

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🎀 SYNOPSIS 🎀

int drm_atomic_helper_resume (struct drm_device *dev , struct
       drm_atomic_commit *state );

two args, one int coming back at you. periodt 💅

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🦋 ARGUMENTS 🦋

• dev — the DRM device. your main character struct, literally the thing being resumed 🔥
• state — the atomic state to resume to. this is the snapshot you're restoring the whole look from, no cap 👑

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✨ DESCRIPTION ✨

so here's the tea, bestie 🍵 — this function calls drm_mode_config_reset to synchronize the hardware and software states (yes, they HAVE to agree, it's a whole thing), then it grabs all the modeset locks and commits the atomic state object. highkey a lot of steps but she does them all 🌈

you'd use this in conjunction with the drm_atomic_helper_suspend helper to implement suspend/resume for drivers that support atomic mode-setting. they're a matched set, like matching nails 💅✨

See also: drm_atomic_helper_suspend — the other half of this duo, iykyk 🫶

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💖 RETURN 💖

0 on success, or a negative error code on failure. simple. iconic. no notes 🙈

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👑 SEE ALSO 👑

okay this list is LONG but every single one of these is a real one, bestie, don't skip any of them, I'm not gonna be the one who left one out 😭

• the kernel file overview: ./drivers/gpu/drm/drm_atomic_helper.c overview(9)
• drm_atomic_helper_check_modeset(9)
• drm_atomic_helper_check_wb_connector_state(9)
• drm_atomic_helper_check_plane_state(9)
• drm_atomic_helper_check_crtc_primary_plane(9)
• drm_atomic_helper_check_planes(9)
• drm_atomic_helper_check(9)
• drm_atomic_helper_commit_encoder_bridge_disable(9)
• drm_atomic_helper_commit_crtc_disable(9)
• drm_atomic_helper_commit_encoder_bridge_post_disable(9)
• drm_atomic_helper_update_legacy_modeset_state(9)
• drm_atomic_helper_calc_timestamping_constants(9)
• drm_atomic_helper_commit_crtc_set_mode(9)
• drm_atomic_helper_commit_modeset_disables(9)
• drm_atomic_helper_commit_writebacks(9)
• drm_atomic_helper_commit_encoder_bridge_pre_enable(9)
• drm_atomic_helper_commit_crtc_enable(9)
• drm_atomic_helper_commit_encoder_bridge_enable(9)
• drm_atomic_helper_commit_modeset_enables(9)
• drm_atomic_helper_wait_for_fences(9)
• drm_atomic_helper_wait_for_vblanks(9)
• drm_atomic_helper_wait_for_flip_done(9)
• drm_atomic_helper_commit_tail(9)
• drm_atomic_helper_commit_tail_rpm(9)
• drm_atomic_helper_async_check(9)
• drm_atomic_helper_async_commit(9)
• drm_atomic_helper_commit(9)
• implementing nonblocking commit(9)
• drm_atomic_helper_setup_commit(9)
• drm_atomic_helper_wait_for_dependencies(9)
• drm_atomic_helper_fake_vblank(9)
• drm_atomic_helper_commit_hw_done(9)
• drm_atomic_helper_commit_cleanup_done(9)
• drm_atomic_helper_prepare_planes(9)
• drm_atomic_helper_unprepare_planes(9)
• drm_atomic_helper_commit_planes(9)
• drm_atomic_helper_commit_planes_on_crtc(9)
• drm_atomic_helper_disable_planes_on_crtc(9)
• drm_atomic_helper_cleanup_planes(9)
• drm_atomic_helper_swap_state(9)
• drm_atomic_helper_update_plane(9)
• drm_atomic_helper_disable_plane(9)
• drm_atomic_helper_set_config(9)
• drm_atomic_helper_disable_all(9)
• drm_atomic_helper_reset_crtc(9)
• drm_atomic_helper_shutdown(9)
• drm_atomic_helper_duplicate_state(9)
• drm_atomic_helper_suspend(9)
• drm_atomic_helper_commit_duplicated_state(9)
• drm_atomic_helper_page_flip(9)
• drm_atomic_helper_page_flip_target(9)
• drm_atomic_helper_bridge_propagate_bus_fmt(9)
• drm_atomic_helper_bridge_get_hdmi_output_bus_fmts(9)

that's fifty-three entries and I typed every one, you're welcome 💀🎀

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so yeah — this page lives in ./drivers/gpu/drm, dated October 2026, and that's the whole manual page, bestie. go forth and resume your displays. slay 💅✨🦋