dm_test_hdc...rs_all_state(9)

💅 dm_test_hdcp_reset_display_clears_all_state — a whole vibe

okay so first things first, bestie: this is a page from the Kernel API Manual, and the star of the show is dm_test_hdcp_reset_display_clears_all_state(9). Yes the header truncates it to dm_test_hdc...rs_all_state(9) — she's got a long name and the terminal was not about to deal with it. Periodt. 💅

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✨ NAME ✨

dm_test_hdcp_reset_display_clears_all_state — reset clears status and connectors 🫶

✨ SYNOPSIS ✨

void dm_test_hdcp_reset_display_clears_all_state (struct kunit *test );

✨ ARGUMENTS ✨

• test — the KUnit test context. That's it, that's the whole argument. She takes one (1) thing and she's ready. 🌸

✨ DESCRIPTION ✨

okay so here's the tea ☕ — hdcp_reset_display has exactly two jobs and it is not allowed to fumble either of them:

• it must reset every connector's encryption_status to HDCP_OFF
• it must clear all per-link aconnector entries

it's giving "clean slate, no crumbs, nothing left behind" energy. literally every connector, every per-link entry. no cap. ✨🧹

✨ SEE ALSO ✨

🦋 Kernel file

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

🎀 The friends in the same test file

• dm_test_hdcp_get_cp_disabled_returns_desired(9)
• dm_test_hdcp_get_cp_type0_returns_enabled(9)
• dm_test_hdcp_get_cp_type1_returns_enabled(9)
• dm_test_hdcp_get_cp_type1_rejects_type0_status(9)
• dm_test_hdcp_get_cp_type0_rejects_type1_status(9)
• dm_test_hdcp_get_adjustments_disable_authentication(9)
• dm_test_hdcp_get_adjustments_type0_policy(9)
• dm_test_hdcp_get_adjustments_type1_policy(9)
• dm_test_hdcp_get_adjustments_fused_io_enables_fw_check(9)
• alloc_test_workqueue(9)
• dm_test_process_output_property_validate_always_scheduled(9)
• dm_test_process_output_callback_needed(9)
• dm_test_process_output_callback_stop(9)
• dm_test_process_output_watchdog_needed(9)
• dm_test_process_output_watchdog_stop(9)
• dm_test_process_output_callback_and_watchdog_needed(9)
• dm_test_process_output_callback_stop_and_needed_requeues(9)
• dm_test_process_output_watchdog_stop_and_needed_requeues(9)
• alloc_test_workqueue_for_property_update(9)
• alloc_update_connector(9)
• dm_test_event_property_update_skips_null_connector(9)
• dm_test_event_property_update_skips_disconnected(9)
• dm_test_event_property_update_skips_null_state(9)
• dm_test_event_property_update_skips_null_dev(9)
• dm_test_event_property_update_desired_when_off(9)
• dm_test_event_property_update_enabled_when_encrypted(9)
• alloc_test_workqueue_for_callback(9)
• dm_test_event_callback_cancels_callback_dwork(9)
• dm_test_event_callback_schedules_property_validate(9)
• alloc_test_workqueue_for_property_validate(9)
• alloc_validate_connector(9)
• dm_test_event_property_validate_skips_null_connector(9)
• dm_test_event_property_validate_skips_disconnected(9)
• dm_test_event_property_validate_skips_null_state(9)
• dm_test_event_property_validate_updates_on_status_change(9)
• dm_test_event_property_validate_no_update_when_unchanged(9)
• dm_test_event_watchdog_timer_cancels_watchdog_dwork(9)
• dm_test_event_watchdog_timer_schedules_property_validate(9)
• alloc_test_workqueue_for_cpirq(9)
• dm_test_event_cpirq_schedules_property_validate(9)
• dm_test_event_cpirq_leaves_callback_and_watchdog_idle(9)
• dm_test_hdcp_handle_cpirq_schedules_work(9)
• dm_test_hdcp_handle_cpirq_selects_link_index(9)
• dm_test_hdcp_update_display_enable_schedules_property_validate(9)
• dm_test_hdcp_update_display_disable_resets_status_and_cancels_validate(9)
• dm_test_hdcp_create_workqueue_zero_max_links_returns_null(9)
• dm_test_hdcp_create_workqueue_initializes_work(9)
• dm_test_hdcp_create_workqueue_sets_dtm_v3_for_dcn31(9)
• dm_test_hdcp_create_workqueue_initializes_all_links(9)
• setup_destroy_sysfs(9)
• dm_test_hdcp_destroy_frees_and_removes_sysfs(9)
• dm_test_hdcp_destroy_zero_links_null_srm(9)
• dm_test_link_lock_locks_and_unlocks_all_links(9)
• dm_test_link_lock_zero_links_is_noop(9)
• dm_test_psp_get_srm_uninitialized_returns_null(9)
• dm_test_psp_set_srm_uninitialized_returns_einval(9)
• dm_test_psp_set_srm_initialized_stages_command(9)
• dm_test_srm_data_write_uninitialized_ta_keeps_srm(9)
• dm_test_srm_data_read_uninitialized_ta_returns_einval(9)
• dm_test_srm_data_read_empty_srm_returns_zero(9)
• alloc_test_ddc_link(9)
• dm_test_lp_write_i2c_builds_single_write_payload(9)
• dm_test_lp_read_i2c_builds_offset_then_read(9)
• dm_test_lp_write_dpcd_forwards_native_write(9)
• dm_test_lp_read_dpcd_forwards_native_read(9)
• dm_test_lp_write_i2c_no_connector_returns_false(9)
• dm_test_lp_read_dpcd_no_connector_returns_false(9)
• dm_test_lp_atomic_i2c_null_handle_returns_false(9)
• dm_test_lp_atomic_i2c_oversized_op_returns_false(9)
• dm_test_lp_atomic_aux_null_handle_returns_false(9)
• dm_test_lp_atomic_aux_oversized_op_returns_false(9)
• alloc_test_workqueue_locked(9)
• alloc_test_connector(9)
• dm_test_hdcp_update_display_enable_registers_connector(9)
• dm_test_hdcp_update_display_disable_sets_status_off(9)
• dm_test_hdcp_remove_display_enabled_resets_cp(9)
• dm_test_hdcp_remove_display_null_state_clears_connector(9)
• alloc_test_workqueue_for_assr(9)
• dm_test_enable_assr_uninitialized_dtm_returns_false(9)
• dm_test_enable_assr_uninitialized_dtm_ignores_link(9)
• dm_test_enable_assr_initialized_builds_command_and_fails(9)
• dm_test_update_config_null_connector_is_noop(9)
• dm_test_update_config_null_dc_link_is_noop(9)
• dm_test_update_config_dpms_off_removes_display(9)
• dm_test_update_config_populates_display_and_link(9)

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that's the whole page bestie, go read the kernel file and slay 💖

and for the sign-off: this little icon comes to you from ./drivers/gpu/drm/amd/display/..., October 2026 edition, filed under dm_test_hdc...rs_all_state(9). mwah 🎀✨