dm_test_hand...detect_false(9)

🎀 dm_test_hand...detect_false(9) 🎀

okay so bestie, this is a page from the Kernel API Manual — yes the whole name is genuinely dm_test_hand...detect_false(9), the truncation is not a typo, it's just the vibe 💅. It's a KUnit test page, so buckle up 🦋

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✨ NAME ✨

dm_test_handle_hpd_irq_helper_detect_false — the test that checks the immediate detect branch. literally that's her whole job 🔥

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🌸 SYNOPSIS 🌸

void dm_test_handle_hpd_irq_helper_detect_false (struct kunit *test );

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💜 ARGUMENTS 💜

• test — the KUnit test context. that's it, that's the argument, she's low maintenance 🫶

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⭐ DESCRIPTION ⭐

So picture this 🌈 — there's no force, no debounce, and detection is stubbed out to report no connection. Given all that, the helper takes the else branch, periodt:

• dc_exit_ips_for_hw_access is a safe no-op here (no IPS support), so nothing spicy happens 💀
• dc_link_detect returns false, which means the connected if (ret) block gets skipped entirely — not me skipping my responsibilities, the code skipping the block 🙈

And the one thing you cannot forget bestie: fake_enable must still be cleared. like, that's the whole point of the test, don't leave her hanging 😭

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🦋 SEE ALSO 🦋

🧚 The kernel file (iykyk)

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

👑 HPD → DAL IRQ source mapping girlies

• dm_test_hpd_to_dal_irq_source_hpd1(9), dm_test_hpd_to_dal_irq_source_hpd2(9), dm_test_hpd_to_dal_irq_source_hpd3(9), dm_test_hpd_to_dal_irq_source_hpd4(9), dm_test_hpd_to_dal_irq_source_hpd5(9), dm_test_hpd_to_dal_irq_source_hpd6(9), dm_test_hpd_to_dal_irq_source_invalid(9), dm_test_hpd_to_dal_irq_source_out_of_range(9)

💖 are_sinks_equal (the comparison clique)

• dm_test_are_sinks_equal_both_null(9), dm_test_are_sinks_equal_first_null(9), dm_test_are_sinks_equal_second_null(9), dm_test_are_sinks_equal_different_signal(9), dm_test_are_sinks_equal_different_edid_length(9), dm_test_are_sinks_equal_different_edid_data(9), dm_test_are_sinks_equal_identical(9), dm_test_are_sinks_equal_zero_length(9), dm_test_are_sinks_equal_full_edid_identical(9), dm_test_are_sinks_equal_full_edid_last_byte_differs(9)

🍓 notification_str (every flavour)

• dm_test_notification_str_no_data(9), dm_test_notification_str_aux_reply(9), dm_test_notification_str_hpd(9), dm_test_notification_str_hpd_irq(9), dm_test_notification_str_set_config(9), dm_test_notification_str_dpia(9), dm_test_notification_str_hpd_sense(9), dm_test_notification_str_fused_io(9), dm_test_notification_str_unknown(9)

🌸 irq init / register / unregister / fini

• dm_test_irq_init_initializes_lists(9)
• dm_test_irq_register_rejects_null_params(9), dm_test_irq_register_rejects_invalid_context(9), dm_test_irq_register_rejects_invalid_source(9)
• dm_test_irq_register_adds_low_context_handler(9), dm_test_irq_register_adds_high_context_handler(9)
• dm_test_irq_register_multiple_handlers(9), dm_test_irq_register_separate_contexts(9)
• dm_test_irq_unregister_rejects_invalid_source(9), dm_test_irq_unregister_rejects_null_handler(9), dm_test_irq_unregister_handler_not_found(9)
• dm_test_irq_fini_removes_registered_handlers(9), dm_test_irq_fini_on_empty_tables(9)

🎀 crtc lookup + funcs

• dm_test_get_crtc_by_otg_inst_returns_match(9), dm_test_get_crtc_by_otg_inst_returns_null(9), dm_test_get_crtc_by_otg_inst_empty_list(9), dm_test_set_irq_funcs(9)

⭐ irq suspend / resume era

• dm_test_irq_suspend_empty(9), dm_test_irq_resume_early_empty(9), dm_test_irq_resume_late_empty(9), dm_test_irq_suspend_registered(9), dm_test_irq_suspend_disables_polling(9), dm_test_irq_resume_early_registered(9), dm_test_irq_resume_late_registered(9), dm_test_irq_resume_late_enables_polling(9)

🫶 hpd rx irq workqueue

• dm_test_hpd_rx_irq_create_workqueue(9), dm_test_hpd_rx_irq_work_suspend_null(9), dm_test_hpd_rx_irq_work_suspend_flushes(9)

💅 set_*_irq_state (the whole collection)

• dm_test_set_crtc_irq_state_no_crtc(9), dm_test_set_pflip_irq_state_no_crtc(9), dm_test_set_vline0_irq_state_no_crtc(9), dm_test_set_vupdate_irq_state_no_crtc(9)
• dm_test_set_crtc_irq_state_otg_disabled(9), dm_test_set_crtc_irq_state_enable(9), dm_test_set_pflip_irq_state_disable(9), dm_test_set_vline0_irq_state_enable(9), dm_test_set_vupdate_irq_state_enable(9), dm_test_set_crtc_irq_state_allows_idle(9)

🔥 irq work dispatch

• dm_test_irq_immediate_work_empty(9), dm_test_irq_immediate_work_invokes_handler(9), dm_test_irq_immediate_work_invokes_all(9), dm_test_irq_schedule_work_empty(9), dm_test_irq_schedule_work_queues_handler(9), dm_test_irq_schedule_work_requeue_fallback(9)

🌈 null dc squad

• dm_test_set_hpd_irq_state_null_dc(9), dm_test_set_dmub_outbox_irq_state_null_dc(9), dm_test_set_dmub_trace_irq_state_null_dc(9), dm_test_outbox_init_null_dc(9)

🧚 hpd init / fini

• dm_test_hpd_init_empty_connectors(9), dm_test_hpd_fini_empty_connectors(9), dm_test_hpd_init_fini_with_connectors(9), dm_test_hpd_init_fini_analog_connector(9), dm_test_hpd_init_fini_irq_ref(9)

💀 hpd rx offload work

• dm_test_hpd_rx_offload_work_no_connector(9), dm_test_hpd_rx_offload_work_no_connection(9), dm_test_hpd_rx_offload_work_automated_test(9), dm_test_hpd_rx_offload_work_link_loss(9)

🦋 hdmi hpd debounce

• dm_test_hdmi_hpd_debounce_detect_false(9), dm_test_hdmi_hpd_debounce_reallow_idle(9)

🙈 handle_hpd_irq fam

• dm_test_handle_hpd_irq_disabled(9), dm_test_handle_hpd_irq_helper_debounce_schedule(9), dm_test_handle_hpd_irq_helper_debounce_release_prev(9)

🌸 handle_hpd_rx_irq + schedule

• dm_test_handle_hpd_rx_irq_disabled(9), dm_test_schedule_hpd_rx_offload_work(9), dm_test_handle_hpd_rx_irq_no_left_work(9), dm_test_handle_hpd_rx_irq_automated_test(9), dm_test_handle_hpd_rx_irq_msg_rdy(9), dm_test_handle_hpd_rx_irq_link_loss(9)

👑 dmub hpd callback

• dm_test_dmub_hpd_callback_null_inputs(9), dm_test_dmub_hpd_callback_invalid_index(9), dm_test_dmub_hpd_callback_empty_connectors(9), dm_test_dmub_hpd_callback_unknown_type_match(9), dm_test_dmub_hpd_callback_hpd_type(9), dm_test_dmub_hpd_callback_hpd_irq_type(9)

🍓 register_hpd_handlers

• dm_test_register_hpd_handlers_empty(9), dm_test_register_hpd_handlers_valid(9), dm_test_register_hpd_handlers_invalid_hpd(9), dm_test_register_hpd_handlers_invalid_hpd_rx(9), dm_test_register_hpd_handlers_dmub_outbox(9)

💜 high irq girlies

• dm_test_pflip_high_irq_no_crtc(9), dm_test_pflip_high_irq_not_submitted(9), dm_test_vupdate_high_irq_no_crtc(9), dm_test_crtc_high_irq_no_crtc(9), dm_test_crtc_high_irq_vrr_pre_ai(9), dm_test_crtc_high_irq_vrr_ai_no_stream(9)

🌈 out-of-range + dmub outbox1 low irq

• dm_test_handle_hpd_work_out_of_range(9), dm_test_dmub_outbox1_low_irq_empty(9), dm_test_dmub_outbox1_low_irq_no_handler(9), dm_test_dmub_outbox1_low_irq_direct_callback(9), dm_test_dmub_outbox1_low_irq_offload(9)

🔥 register irq handlers (dce110 + dcn10) and outbox handlers

• dm_test_dce110_register_irq_handlers_rejects_uninitialized_sources(9), dm_test_dce110_register_irq_handlers_one_crtc(9), dm_test_dcn10_register_irq_handlers_zero_crtc(9), dm_test_dcn10_register_irq_handlers_one_crtc(9), dm_test_register_outbox_irq_handlers_without_dmub(9), dm_test_register_outbox_irq_handlers_with_dmub(9)

⭐ the finale

• dm_test_irq_handler_dispatches_work(9), dm_test_handle_vmin_vmax_update(9)

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ngl bestie, that SEE ALSO list is a whole friend group 💀 but every single one of them matters, don't skip a single name.

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mwah 💋 this page lives in ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — ok bye, go clear that fake_enable 🫶✨