alloc_test_w...perty_update(9)
πΈ alloc_test_workqueue_for_property_update β bestie, let me put you on π
okay so this is a page out of the Kernel API Manual (that's the manual name, iykyk) and it's about alloc_test_workqueue_for_property_update(9). yes the title up there is abbreviated, the real function name is the whole long thing. we move.
β¨ NAME β¨
alloc_test_workqueue_for_property_update β literally just allocates a minimal workqueue so the callback tests have something to work with π
β¨ SYNOPSIS β¨
struct hdcp_workqueue * alloc_test_workqueue_for_property_update (struct
kunit *test );
β¨ ARGUMENTS β¨
testβ the KUnit test context π§ it's the thing that does the managed allocation for you, so you don't have to hand-clean anything. slay.
β¨ DESCRIPTION β¨
so what it actually does π«Ά β it allocates a minimal hdcp_workqueue and gets property_update_work initialised, so that event_property_update can resolve container_of safely. no cap, that's the whole point: without that init, the container_of dance is not safe.
and the mutex gets initialised too! π because the connected path takes guard(mutex), so if the mutex weren't set up, we'd be in for a bad time. so yeah: work structure + mutex, both initialised, minimal everything else. iconic behaviour honestly.
fr fr, the word "minimal" is doing real work here β it's not the full fat workqueue, it's the just-enough version for the callback tests πΈ
β¨ SEE ALSO β¨
okay this list is long long, but I'm not skipping a single one because every reference matters, periodt. π
- Kernel file:
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_hdcp_test.cβ that's the file, go read it, it's giving main character energy β 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)β the parent of this whole situation πdm_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_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)dm_test_hdcp_reset_display_clears_all_state(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)
and that's the whole page, bestie π¦ no gatekeeping, every flag-free reference is right there for you.
β¨ one last cute lil sign-off: this page comes from the kernel source path ./drivers/gpu/drm/amd/display/..., dated October 2026, and the manual it lives in is the Kernel API Manual. so if you ever need to cite it, that's your receipt π π₯
and the page title, one more time for the folks in the back: alloc_test_w...perty_update(9) β yeah it's abbreviated, don't come for me, that's literally how it's printed π π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms