dm_test_mst_...dth_no_crash(9)
πΈ dm_test_mst_update_branch_bandwidth_no_crash β Kernel API Manual, section 9 πΈ
okay so bestie, welcome to the dm_test_mst_...dth_no_crash(9) page π
yes the title on the page is literally truncated like that, don't come for me, that's just how section 9 of the Kernel API Manual rolls. Anyway. This one's a whole vibe: it's a DRM/KUnit test stub. Let's get into it π«Ά
β¨ NAME β¨
dm_test_mst_update_branch_bandwidth_no_crash β the test that is literally just an empty stub, and the entire point is that it does not crash ππ
π¦ SYNOPSIS π¦
void dm_test_mst_update_branch_bandwidth_no_crash (struct kunit *test );
that's it. that's the whole signature. a void function taking one pointer and returning absolutely nothing, and honestly? iconic β¨
π ARGUMENTS π
testβ the KUnit test context π§ͺ like, the little test harness bestie that gets handed in so the test knows what's up. That's the whole argument list, we love a low-maintenance king π
π SEE ALSO π
π Kernel file
the source lives right here, no cap:
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c
π― the whole friend group (all the sibling tests, in order, exactly as listed)
dm_test_edid_extract_panel_id_basic(9)dm_test_edid_extract_panel_id_zeros(9)dm_test_apply_edid_quirks_dpcd_poweroff_delay(9)dm_test_apply_edid_quirks_disable_fams(9)dm_test_apply_edid_quirks_remove_sink_ext_caps(9)dm_test_apply_edid_quirks_disable_colorimetry(9)dm_test_apply_edid_quirks_skip_phy_ssc(9)dm_test_apply_edid_quirks_unknown_noop(9)dm_test_parse_edid_caps_null_edid(9)dm_test_parse_edid_caps_null_caps(9)dm_test_parse_edid_caps_valid(9)dm_test_parse_edid_caps_bad_checksum(9)dm_test_parse_edid_caps_hdmi_frl(9)dm_test_parse_edid_caps_hdmi_frl_dsc(9)dm_test_parse_edid_caps_cea_audio(9)dm_test_parse_edid_caps_cea_no_speaker(9)dm_test_probe_acpi_edid_no_companion(9)dm_test_read_acpi_edid_debug_mask_disabled(9)dm_test_read_acpi_edid_non_panel_connector(9)dm_test_read_acpi_edid_force_off(9)dm_test_read_vbios_edid_non_embedded(9)dm_test_read_vbios_edid_missing_callback(9)dm_test_read_vbios_edid_callback_error(9)dm_test_read_vbios_edid_missing_fake_edid(9)dm_test_read_vbios_edid_invalid_fake_edid(9)dm_test_read_vbios_edid_valid(9)dm_test_freesync_pcon_whitelist_all_known(9)dm_test_freesync_pcon_whitelist_not_in_list(9)dm_test_freesync_pcon_whitelist_zero(9)dm_test_populate_hdmi_scdc_present_true(9)dm_test_populate_hdmi_scdc_present_false(9)dm_test_populate_hdmi_frl_dsc_10bpc(9)dm_test_populate_hdmi_frl_dsc_12bpc(9)dm_test_populate_hdmi_frl_dsc_unknown_values(9)dm_test_adaptive_sync_type_none_default(9)dm_test_adaptive_sync_type_converter_no_conditions(9)dm_test_adaptive_sync_type_converter_partial_conditions(9)dm_test_adaptive_sync_type_pcon_whitelist(9)dm_test_adaptive_sync_type_converter_nonwhitelist(9)dm_test_helpers_is_fullscreen_returns_false(9)dm_test_helpers_is_hdr_on_returns_false(9)dm_test_get_max_frl_rate_3lanes_3gbps(9)dm_test_get_max_frl_rate_3lanes_6gbps(9)dm_test_get_max_frl_rate_4lanes_6gbps(9)dm_test_get_max_frl_rate_4lanes_8gbps(9)dm_test_get_max_frl_rate_4lanes_10gbps(9)dm_test_get_max_frl_rate_4lanes_12gbps(9)dm_test_get_max_frl_rate_unknown(9)dm_test_dtn_log_buffer_accumulates(9)dm_test_dtn_log_null_ctx_no_crash(9)dm_test_dp_read_dpcd_null_priv(9)dm_test_dp_write_dpcd_null_priv(9)dm_test_dp_read_dpcd_success(9)dm_test_dp_write_dpcd_success(9)dm_test_execute_fused_io_null_dmub_srv(9)dm_test_execute_synaptics_rc_command_write_success(9)dm_test_execute_synaptics_rc_command_read_success(9)dm_test_execute_synaptics_rc_command_write_fail(9)dm_test_apply_synaptics_fifo_reset_wa_full(9)dm_test_apply_synaptics_fifo_reset_wa_first_fail(9)dm_test_write_dsc_enable_synaptics_enable_inactive(9)dm_test_write_dsc_enable_synaptics_enable_active(9)dm_test_write_dsc_enable_synaptics_disable_inactive(9)dm_test_write_dsc_enable_synaptics_disable_active(9)dm_test_write_dsc_enable_synaptics_enable_non_synaptics(9)dm_test_dp_write_dsc_enable_routes_synaptics(9)dm_test_mst_start_top_mgr_null_priv(9)dm_test_mst_stop_top_mgr_null_priv(9)dm_test_mst_start_top_mgr_boot(9)dm_test_dp_write_hblank_reduction_false(9)dm_test_get_dsc_max_slices_1_340(9)dm_test_get_dsc_max_slices_2_340(9)dm_test_get_dsc_max_slices_4_340(9)dm_test_get_dsc_max_slices_8_340(9)dm_test_get_dsc_max_slices_8_400(9)dm_test_get_dsc_max_slices_12_400(9)dm_test_get_dsc_max_slices_16_400(9)dm_test_get_dsc_max_slices_unknown(9)dm_test_init_panel_settings_pps(9)dm_test_init_panel_settings_dsc(9)dm_test_override_panel_settings_debug_mask_disables_dsc(9)dm_test_override_panel_settings_second_edp_disables_psr(9)dm_test_fill_mst_payload_table_enable(9)dm_test_fill_mst_payload_table_disable(9)dm_test_fill_mst_payload_table_empty(9)dm_test_submit_i2c_null_priv(9)dm_test_submit_i2c_success(9)dm_test_submit_i2c_partial_transfer(9)dm_test_dmub_aux_transfer_sync_hpd_discon(9)dm_test_dp_update_branch_info_no_crash(9)dm_test_mst_poll_pending_down_reply_no_crash(9)dm_test_mst_clear_payload_alloc_table_no_crash(9)dm_test_set_dcn_clocks_no_crash(9)dm_test_dmu_timeout_no_crash(9)dm_test_smu_timeout_no_crash(9)dm_test_set_phyd32clk_no_crash(9)dm_test_mst_write_payload_alloc_table_null_ctx(9)dm_test_mst_poll_for_act_null_ctx(9)dm_test_mst_send_payload_alloc_null_ctx(9)dm_test_mst_update_mgr_dealloc_null_ctx(9)dm_test_is_dp_sink_present_null_priv(9)dm_test_dmub_outbox_interrupt_control_null_dc(9)dm_test_mst_enable_stream_features_aux_disabled(9)dm_test_mst_enable_stream_features_writes_downspread(9)dm_test_enable_periodic_detection_no_workqueue(9)dm_test_enable_periodic_detection_updates_enable(9)dm_test_enable_periodic_detection_schedules_work(9)dm_test_read_mccs_caps_null_ctx(9)dm_test_read_mccs_caps_null_link(9)dm_test_read_mccs_caps_no_vcp_code(9)dm_test_read_mccs_caps_i2c_vcp_request(9)dm_test_read_mccs_caps_hdmi_vcp_request(9)dm_test_read_mccs_caps_legacy_pcon_vcp_request(9)dm_test_read_mccs_caps_i2c_failure(9)dm_test_mccs_vcp_set_null_ctx(9)dm_test_mccs_vcp_set_not_supported(9)dm_test_mccs_vcp_set_null_link(9)dm_test_mccs_vcp_set_i2c_packet(9)dm_test_mccs_vcp_set_i2c_failure(9)dm_test_construct_old_payload_empty_list(9)dm_test_construct_old_payload_intervening(9)dm_test_write_payload_alloc_table_success(9)dm_test_write_payload_alloc_table_enable(9)dm_test_write_payload_alloc_table_disable(9)dm_test_mst_start_top_mgr_set_mst_fail(9)dm_test_mst_stop_top_mgr_active(9)dm_test_poll_for_act_no_mst_state(9)dm_test_poll_for_act_success(9)dm_test_poll_for_act_status_failed(9)dm_test_mst_send_payload_alloc_part2_fail(9)dm_test_mst_update_mgr_dealloc_success(9)dm_test_dp_write_dsc_enable_mst_no_aux(9)dm_test_dp_write_dsc_enable_non_dp(9)dm_test_dp_write_dsc_enable_mst_enable_decode_only(9)dm_test_dp_write_dsc_enable_mst_enable_passthrough(9)dm_test_dp_write_dsc_enable_mst_disable_decode_only(9)dm_test_dp_write_dsc_enable_mst_disable_passthrough(9)dm_test_dp_write_dsc_enable_sst_rx_enable(9)dm_test_dp_write_dsc_enable_sst_rx_disable(9)dm_test_dp_write_dsc_enable_pcon_enable(9)dm_test_dp_write_dsc_enable_pcon_disable(9)dm_test_dp_handle_test_pattern_no_pipe(9)
like, that's the entire friend group and yes they ALL get a shoutout, no one gets left on read π
ngl bestie, the whole serve of this page is that the function is an empty stub whose job is to prove it doesn't crash. no outputs promised, no clever behaviour described β just "it exists, it runs, nothing explodes" ππ don't go reading anything more into it.
and that's the page!! π source path in the footer reads ./drivers/gpu/drm/amd/display/... and the date stamp says October 2026 β so yeah, season 2026 of the Kernel API Manual, section 9, and this test is out here doing the absolute least and slaying while doing it πβ¨ mwah 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