dm_hw_fini(9)

✨ dm_hw_fini(9) — the Kernel API Manual glow-up ✨

okay so bestie, welcome to dm_hw_fini, a page from the Kernel API Manual (section 9, kernel functions, iykyk). this is the teardown era of the DC device and honestly it's giving closing-shift energy 💅

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🎀 NAME 🎀

dm_hw_fini — Teardown DC device. that's it, that's the vibe. it packs up the DC device's whole situation ✨

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🌸 SYNOPSIS 🌸

int dm_hw_fini (struct amdgpu_ip_block *ip_block );

like, it takes one arg and hands you back an int. no cap.

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🦋 ARGUMENTS 🦋

• ip_block — pointer to the amdgpu_ip_block for this hw instance. literally just a pointer to the hardware instance's IP block, main character energy only 🫶

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💖 DESCRIPTION 💖

so what does she do? she tears down the components inside struct amdgpu_display_manager that require cleanup. the whole cleanup situation involves:

• cleaning up the DRM device
• cleaning up the DC
• cleaning up any modules that were loaded

and then — plot twist — she also flushes the IRQ workqueues and disables them. slay, but make it tidy ✨ no leftover queue chaos, periodt.

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🌈 SEE ALSO 🌈

first up, the kernel file, in all its glory:

./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

and the whole friend group 🫶:

• overview(9)
• update_planes_and_stream_adapter(9)
• dm_hw_init(9)
• amdgpu_dm_dump_links_and_sinks(9)
• DM Lifecycle(9)
• atomic(9)
• fill_dc_dirty_rects(9)
• dm_arm_vblank_event_pre_programming(9)
• amdgpu_dm_crtc_complete_writeback(9)
• amdgpu_dm_mod_power_update_streams(9)
• amdgpu_dm_mod_power_setup_streams(9)
• amdgpu_dm_atomic_commit_tail(9)
• amdgpu_dm_atomic_check(9)

ngl if you're reading dm_hw_fini you should probably also go read dm_hw_init(9) — they're literally a matched set, the setup and the teardown, iconic duo behavior 👑

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and that's the page, bestie!! source/version is the classic ./drivers/gpu/drm/amd/display/... path (yes, the truncated one, she's mysterious like that 🙈), stamped October 2026, and it lives at dm_hw_fini(9). go forth and tear down responsibly 💜✨