dm_test_crtc...o_connectors(9)

💅 dm_test_crtc_is_headless_no_connectors — Kernel API Manual ✨

okay so bestie, buckle up, because we're diving into a KUnit test in the kernel's DRM/AMD display corner and it is exactly what it says on the tin 🎀 This page lives in the Kernel API Manual, and the star of the show is dm_test_crtc_is_headless_no_connectors — yes, that's the whole name, she's long, she's thorough, she ate 💅

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🌸 NAME 🌸

dm_test_crtc_is_headless_no_connectors — literally just: Test Crtc is headless no connectors 🦋 no cap, that's the vibe check and she passed.

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✨ SYNOPSIS ✨

void dm_test_crtc_is_headless_no_connectors (struct kunit *test );

that's it. that's the whole signature. one function, zero return value, void as the day she was born 💀

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🫶 ARGUMENTS 🫶

• test — The KUnit test context 👑 this is her little world, her main character energy, the struct she gets handed to do her thing with. respect her.

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🔥 SEE ALSO 🔥

okay so this is the part where I hold your hand, because the SEE ALSO list here is lowkey enormous and honestly it's giving "friend group that all shows up to the group chat at once" 😭 every single one of these is a sibling test, and they all live together in the kernel file:

• ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_crtc_test.c

and now, the full squad, in order, no one left behind 🫶:

• dm_test_crtc_modeset_required_active_mode_changed(9)
• dm_test_crtc_modeset_required_active_active_changed(9)
• dm_test_crtc_modeset_required_active_connectors_changed(9)
• dm_test_crtc_modeset_required_inactive(9)
• dm_test_crtc_modeset_required_no_changes(9)
• dm_test_crtc_vrr_active_irq_variable(9)
• dm_test_crtc_vrr_active_irq_fixed(9)
• dm_test_crtc_vrr_active_irq_inactive(9)
• dm_test_crtc_vrr_active_irq_disabled(9)
• dm_test_crtc_vrr_active_irq_unsupported(9)
• dm_test_crtc_vrr_active_variable(9)
• dm_test_crtc_vrr_active_fixed(9)
• dm_test_crtc_vrr_active_inactive(9)
• dm_test_crtc_vrr_active_disabled(9)
• dm_test_crtc_vrr_active_unsupported(9)
• dm_test_crtc_is_headless_null_adev(9)
• dm_test_crtc_is_headless_writeback_only(9)
• dm_test_crtc_is_headless_disconnected_display(9)
• dm_test_crtc_is_headless_connected_display(9)
• dm_test_crtc_is_headless_mixed_connectors(9)
• dm_test_crtc_helper_mode_fixup_returns_true(9)
• dm_test_crtc_set_vupdate_irq_no_otg(9)
• dm_test_crtc_set_vupdate_irq_dc_busy(9)
• dm_test_crtc_set_vupdate_irq_enable(9)
• dm_test_idle_create_workqueue(9)
• dm_test_idle_worker_disabled_clears_running(9)
• dm_test_idle_worker_enabled_breaks_when_idle_disallowed(9)
• dm_test_idle_worker_enabled_breaks_when_not_headless(9)
• dm_test_idle_worker_enabled_runs_body(9)
• dm_test_crtc_set_static_screen_optimze_no_sr_entry(9)
• dm_test_crtc_set_static_screen_optimze_sr_entry_psr(9)
• dm_test_crtc_set_static_screen_optimze_psr_su_skips(9)
• dm_test_crtc_enable_vblank_rejects_unconfigured(9)
• dm_test_crtc_enable_vblank_full_path(9)
• dm_test_crtc_enable_vblank_vupdate_busy(9)
• dm_test_crtc_enable_vblank_crtc_irq_error(9)
• dm_test_crtc_enable_vblank_in_reset(9)
• dm_test_crtc_enable_vblank_queues_work(9)
• dm_test_crtc_enable_vblank_ips_restore(9)
• dm_test_crtc_enable_vblank_ips_restore_replay(9)
• dm_test_crtc_update_active_planes_no_stream(9)
• dm_test_count_crtc_active_planes_none(9)
• dm_test_count_crtc_active_planes_mixed(9)
• dm_test_crtc_duplicate_state_copies_fields(9)
• dm_test_crtc_reset_state_allocates_state(9)
• dm_test_crtc_destroy_state_no_stream(9)
• dm_test_crtc_destroy_state_releases_stream(9)
• dm_test_crtc_handle_vblank_no_event(9)
• dm_test_crtc_handle_vblank_skips_when_flip_submitted(9)
• dm_test_crtc_handle_vblank_completes_cursor_only(9)
• dm_test_vblank_control_worker_setup(9)
• dm_test_vblank_control_worker_enable_increments(9)
• dm_test_vblank_control_worker_disable_decrements(9)
• dm_test_vblank_control_worker_disable_clamps_zero(9)
• dm_test_crtc_disable_vblank_no_irq_installed(9)
• dm_test_crtc_disable_vblank_vrr(9)
• dm_test_crtc_disable_vblank_queues_work(9)

like… icons, every single one of them. iykyk 💜 (and yes, dm_test_crtc_set_static_screen_optimze_* really is spelled like that, we do NOT correct the kernel, we respect the kernel 🫡)

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ngl bestie, if you're looking for the actual assertion guts, they're not spelled out on this page — the synopsis and the file path are what you get. go read the source, that's where the lore lives 📖✨

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source & version vibe: this page comes to you from ./drivers/gpu/drm/amd/display/... in the Kernel API Manual, and it's dated October 2026 🦋 she's from the future and she's still a headless-crtc-with-no-connectors test, periodt 💅🎀