dm_test_detect_force_on(9)

✨ dm_test_detect_force_on(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 you're looking at dm_test_detect_force_on(9) and honestly? it's a whole vibe. we're in the KUnit test suite for the amdgpu display driver, and this little icon is here to check one very specific thing and then go home. no cap.

🌸 NAME 🌸

dm_test_detect_force_on — the test where DRM_FORCE_ON should report connected 🔌✨ that's literally the whole job.

🎀 SYNOPSIS 🎀

void dm_test_detect_force_on (struct kunit *test );

like, that's it. that's the signature. one argument, no return, main character energy 🫶

🦋 ARGUMENTS 🦋

test — the KUnit test context 💖 the little struct that carries all the test scaffolding around so the test can do its thing. it's the backstage pass of the whole operation, iykyk.

🌈 SEE ALSO 🌈

okay so this part is long and I'm not skipping a single one of them, bestie — the whole test family is listed here and every single test is getting its moment 👑

the kernel file lives at ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_connector_test.c — Kernel file, bestie. that's where the party's at 🎉

the subconnector + content type girlies 🧚

dm_test_subconnector_type_none(9), dm_test_subconnector_type_vga(9), dm_test_subconnector_type_dvi_converter(9), dm_test_subconnector_type_dvi_dongle(9), dm_test_subconnector_type_hdmi_converter(9), dm_test_subconnector_type_hdmi_dongle(9), dm_test_subconnector_type_mismatched(9), dm_test_subconnector_type_default_unknown(9), dm_test_content_type_no_data(9), dm_test_content_type_graphics(9), dm_test_content_type_photo(9), dm_test_content_type_cinema(9), dm_test_content_type_game(9), dm_test_content_type_unknown_defaults_no_data(9)

colour depth + output colour space squad 🍓

connector types + duplicate modes + crtc masks 💜

timing + funcs reset gang ⭐

dm_test_copy_crtc_timing_copies_all_fields(9), dm_test_copy_crtc_timing_leaves_non_crtc_fields(9), dm_test_decide_crtc_timing_scale_enabled(9), dm_test_decide_crtc_timing_matching_mode(9), dm_test_decide_crtc_timing_no_copy(9), dm_test_decide_crtc_timing_no_crtc_clock(9), dm_test_funcs_reset_sets_defaults(9), dm_test_funcs_reset_edp_abm_level(9), dm_test_funcs_reset_edp_abm_disabled(9), dm_test_atomic_dup_state_copies_fields(9), dm_test_fill_hdr_null_metadata(9), dm_test_fill_hdr_zeroes_output(9)

set/get property besties 🔥

refresh + freesync + cacp caps energy 🦋

dm_test_highest_refresh_writeback_null(9), dm_test_highest_refresh_cached_base(9), dm_test_highest_refresh_preferred_mode(9), dm_test_is_freesync_video_mode_null_mode(9), dm_test_is_freesync_video_mode_match(9), dm_test_is_freesync_video_mode_no_match(9), dm_test_cacp_caps_unsupported_ip(9), dm_test_cacp_caps_excluded_ip_316(9), dm_test_cacp_caps_edp_oled_supported(9), dm_test_cacp_caps_lvds_oled_supported(9), dm_test_cacp_caps_non_edp_signal(9), dm_test_cacp_caps_lcd_panel(9)

panel type detectives 🧚‍♀️

dm_test_set_panel_type_vsdb_oled(9), dm_test_set_panel_type_vsdb_miniled(9), dm_test_set_panel_type_dpcd_oled(9), dm_test_set_panel_type_dpcd_miniled(9), dm_test_set_panel_type_did_oled(9), dm_test_set_panel_type_did_lcd(9), dm_test_set_panel_type_vendor_lum_heuristic(9), dm_test_set_panel_type_defaults_to_lcd(9)

subconnector updates + fbc + mst + crtc hunting 👑

dm_test_update_subconnector_dp_with_sink(9), dm_test_update_subconnector_dp_no_sink(9), dm_test_update_subconnector_non_dp_noop(9), dm_test_fbc_init_no_compressor(9), dm_test_fbc_init_non_edp(9), dm_test_fbc_init_already_allocated(9), dm_test_fbc_init_no_modes(9), dm_test_detect_mst_no_connectors(9), dm_test_detect_mst_skips_writeback(9), dm_test_detect_mst_non_mst_link(9), dm_test_detect_mst_branch_without_aux(9), dm_test_find_first_crtc_match(9), dm_test_find_first_crtc_no_match(9), dm_test_find_first_crtc_empty_state(9), dm_test_find_first_crtc_skips_null_ptr(9), dm_test_find_first_crtc_returns_first(9)

more panel type + more cacp caps 💀

dm_test_set_panel_type_samsung_miniled(9), dm_test_set_panel_type_samsung_below_threshold(9), dm_test_set_panel_type_default_lcd(9), dm_test_cacp_caps_edp_supported(9), dm_test_cacp_caps_lvds_supported(9), dm_test_cacp_caps_old_ip_unsupported(9), dm_test_cacp_caps_ip_3_1_6_unsupported(9), dm_test_cacp_caps_non_edp_lvds_unsupported(9), dm_test_cacp_caps_lcd_unsupported(9)

fill stream era 🌸

create stream crew 🎀

dm_test_create_stream_fake_sink_success(9), dm_test_create_stream_sets_dm_context(9), dm_test_create_stream_virtual_signal(9), dm_test_create_stream_scaling_src(9), dm_test_create_stream_existing_sink(9)

the detect siblings (our girl's family fr) 🔌

dm_test_detect_force_on_digital(9), dm_test_detect_force_off(9), dm_test_detect_sink_present(9), dm_test_detect_no_sink(9)

misc icon behaviour 💅

dm_test_poll_dac_load_returns_cached(9), dm_test_late_register_non_dp_succeeds(9), dm_test_unregister_non_dp_noop(9), dm_test_destroy_minimal(9), dm_test_destroy_releases_dc_sink(9), dm_test_destroy_releases_dc_em_sink(9), dm_test_encoder_disable_noop(9), dm_test_atomic_check_edp_native_keeps_scaling(9), dm_test_atomic_check_lvds_non_native_enables_scaling(9), dm_test_atomic_check_non_mst_returns_zero(9)

hdmi cec + edid management 🙈

dm_test_hdmi_cec_unset_edid_no_notifier(9), dm_test_create_eml_sink_no_edid(9), dm_test_handle_edid_mgmt_dp_sets_link_caps(9), dm_test_handle_edid_mgmt_non_dp_leaves_caps(9), dm_test_funcs_force_no_edid(9)

stream/encoder/mode validation ⭐

dm_test_validate_stream_null_stream(9), dm_test_to_encoder_no_encoder(9), dm_test_to_encoder_returns_attached(9), dm_test_native_mode_no_encoder(9), dm_test_native_mode_empty_probed_zeroes_clock(9), dm_test_native_mode_copies_preferred(9), dm_test_create_common_mode_overrides(9), dm_test_add_common_modes_non_edp_noop(9), dm_test_add_common_modes_edp_adds(9), dm_test_ddc_get_modes_null_edid(9), dm_test_add_fs_modes_no_preferred_mode(9), dm_test_add_freesync_modes_null_edid_noop(9), dm_test_i2c_func_returns_flags(9), dm_test_i2c_xfer_no_ddc_pin(9)

vsdb + displayid parsing detectives 🕵️‍♀️

dm_test_get_amd_vsdb_unsupported(9), dm_test_get_amd_vsdb_supported(9), dm_test_parse_hdmi_amd_vsdb_null_edid(9), dm_test_parse_hdmi_amd_vsdb_no_extensions(9), dm_test_parse_hdmi_amd_vsdb_no_cea_ext(9), dm_test_parse_displayid_vrr_null_edid(9), dm_test_parse_displayid_vrr_no_displayid(9), dm_test_parse_displayid_vrr_sets_range(9)

mode valid + cec suspend/resume + validate stream 😭

dm_test_mode_valid_interlace_rejected(9), dm_test_mode_valid_dblscan_rejected(9), dm_test_hdmi_cec_set_edid_no_notifier(9), dm_test_s3_handle_hdmi_cec_suspend(9), dm_test_s3_handle_hdmi_cec_resume(9), dm_test_create_validate_stream_null_dm_state(9)

update after detect + update scaling finale 🔥

dm_test_update_after_detect_mst_noop(9), dm_test_update_after_detect_sink_unchanged(9), dm_test_update_scaling_null_mode(9), dm_test_update_scaling_fullscreen_default(9), dm_test_update_scaling_rmx_full(9), dm_test_update_scaling_rmx_aspect_pillarbox(9), dm_test_update_scaling_rmx_aspect_letterbox(9), dm_test_update_scaling_rmx_center(9), dm_test_update_scaling_underscan(9)

and that's the whole roster, no cap, every last one of them 💖

✨ cute little sign-off ✨

so that's the page, bestie 🫶 it came from ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — put it in your calendar, it's giving very demure, very mindful, very future-core 💅 see you in the next test 🎀

📦 where this page comes from

nixpkgs unstable: linux-manual 7.3.1
💖 girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on 2026-11-04: a language model's rewrite of the original, under its terms