dm_test_deci...atching_mode(9)

🌸 dm_test_deci...atching_mode(9) — your new fave kernel API page 💅

okay so bestie, welcome to the dm_test_deci...atching_mode(9) page from the Kernel API Manual. yes the title is literally truncated with dots in the middle, that's just how it is, we don't question it, we accept her 🫶. she's a KUnit test helper living deep in the AMD display driver test suite, and honestly? she ate.

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✨ NAME ✨

dm_test_decide_crtc_timing_matching_mode — Test Decide crtc timing matching mode

that's the whole name. she's long. she's specific. she's lowkey the moment 💅

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✨ SYNOPSIS ✨

void dm_test_decide_crtc_timing_matching_mode (struct kunit *test );

one function, one argument, zero drama. icon behavior honestly 👑

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✨ ARGUMENTS ✨

• test — The KUnit test context. that's it. that's the whole vibe. it's the KUnit test context and you're gonna hand it over and let her cook 🍓

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✨ SEE ALSO ✨

okay so this is the part where she shows you her entire friend group 😭 like genuinely, the whole group chat is linked here. the kernel file she lives in:

Kernel file
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_connector_test.c

and now, the entire roster of siblings and cousins — every single one, no cap, nothing skipped, we love a complete list 💖

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),
dm_test_adjust_colour_depth_fits_at_888(9),
dm_test_adjust_colour_depth_reduces_to_888(9),
dm_test_adjust_colour_depth_10bpc_passes(9),
dm_test_adjust_colour_depth_420_halves_clk(9),
dm_test_adjust_colour_depth_420_reduces(9),
dm_test_adjust_colour_depth_reduces_12bpc_to_10bpc(9),
dm_test_adjust_colour_depth_16bpc_no_fallback(9),
dm_test_adjust_colour_depth_none_fits(9),
dm_test_adjust_colour_depth_invalid_depth(9),
dm_test_output_color_space_default_rgb_full(9),
dm_test_output_color_space_default_rgb_limited(9),
dm_test_output_color_space_default_ycbcr709(9),
dm_test_output_color_space_default_ycbcr601_limited(9),
dm_test_output_color_space_bt601_y_only(9),
dm_test_output_color_space_bt601(9),
dm_test_output_color_space_bt709(9),
dm_test_output_color_space_bt709_y_only(9),
dm_test_output_color_space_oprgb(9),
dm_test_output_color_space_bt2020_rgb(9),
dm_test_output_color_space_bt2020_rgb_limited(9),
dm_test_output_color_space_default_rgb_auto_hdmi_cta(9),
dm_test_output_color_space_default_rgb_auto_hdmi_vga(9),
dm_test_output_color_space_default_rgb_auto_dp_cta(9),
dm_test_output_color_space_default_rgb_full_hdmi_cta(9),
dm_test_output_color_space_bt2020_rgb_auto_hdmi_cta(9),
dm_test_output_color_space_bt2020_ycc(9),
dm_test_output_color_space_default_ycbcr709_y_only(9),
dm_test_output_color_space_default_ycbcr601(9),
dm_test_output_color_space_bt2020_ycc_rgb_encoding(9),
dm_test_output_color_space_bt2020_ycc_rgb_encoding_limited(9),
dm_test_output_color_space_bt2020_rgb_ycc_encoding(9),
dm_test_convert_color_depth_bpc_mappings(9),
dm_test_convert_color_depth_bpc_unknown(9),
dm_test_color_depth_from_info_bpc8(9),
dm_test_color_depth_from_info_bpc10(9),
dm_test_color_depth_from_info_zero_bpc_defaults_888(9),
dm_test_color_depth_from_info_requested_bpc_caps(9),
dm_test_color_depth_from_info_y420_default(9),
dm_test_color_depth_from_info_y420_10bpc(9),
dm_test_color_depth_from_info_y420_12bpc(9),
dm_test_color_depth_from_info_y420_16bpc(9),
dm_test_color_depth_from_info_requested_odd_bpc(9),
dm_test_color_depth_from_info_unsupported_bpc(9),
dm_test_to_connector_type_hdmi(9), dm_test_to_connector_type_edp(9),
dm_test_to_connector_type_lvds(9), dm_test_to_connector_type_rgb(9),
dm_test_to_connector_type_dp(9), dm_test_to_connector_type_dp_mst(9),
dm_test_to_connector_type_dvi_dvii(9),
dm_test_to_connector_type_dual_link_dvii(9),
dm_test_to_connector_type_dvi_dvid(9),
dm_test_to_connector_type_dual_link_dvid(9),
dm_test_to_connector_type_virtual(9),
dm_test_to_connector_type_unknown(9),
dm_test_is_duplicate_mode_empty_list(9),
dm_test_is_duplicate_mode_match(9),
dm_test_is_duplicate_mode_no_match(9),
dm_test_is_duplicate_mode_same_size_different_clock(9),
dm_test_encoder_crtc_mask_1(9), dm_test_encoder_crtc_mask_2(9),
dm_test_encoder_crtc_mask_3(9), dm_test_encoder_crtc_mask_4(9),
dm_test_encoder_crtc_mask_5(9), dm_test_encoder_crtc_mask_6(9),
dm_test_encoder_crtc_mask_default(9), dm_test_aspect_ratio_no_data(9),
dm_test_aspect_ratio_4_3(9), dm_test_aspect_ratio_16_9(9),
dm_test_aspect_ratio_64_27(9), dm_test_aspect_ratio_256_135(9),
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_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),
dm_test_set_property_scaling_center(9),
dm_test_set_property_scaling_aspect(9),
dm_test_set_property_scaling_fullscreen(9),
dm_test_set_property_scaling_none(9),
dm_test_set_property_scaling_unchanged(9),
dm_test_set_property_underscan_hborder(9),
dm_test_set_property_underscan_vborder(9),
dm_test_set_property_underscan_enable(9),
dm_test_set_property_abm_sysfs_control(9),
dm_test_set_property_abm_level_off(9),
dm_test_set_property_abm_level_value(9),
dm_test_set_property_unknown(9), dm_test_get_property_scaling_center(9),
dm_test_get_property_scaling_aspect(9),
dm_test_get_property_scaling_full(9),
dm_test_get_property_scaling_off(9),
dm_test_get_property_underscan_borders(9),
dm_test_get_property_abm_sysfs_allowed(9),
dm_test_get_property_abm_level(9),
dm_test_get_property_abm_disabled_zero(9),
dm_test_get_property_unknown(9),
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),
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),
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),
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),
dm_test_fill_stream_borders_zeroed(9),
dm_test_fill_stream_rgb_defaults(9),
dm_test_fill_stream_sync_polarity_positive(9),
dm_test_fill_stream_sync_polarity_negative(9),
dm_test_fill_stream_inherits_old_stream(9),
dm_test_fill_stream_timing_from_crtc(9),
dm_test_fill_stream_color_depth_requested_bpc(9),
dm_test_fill_stream_content_type(9),
dm_test_fill_stream_aspect_ratio(9),
dm_test_fill_stream_encoding_from_caller_ycbcr420(9),
dm_test_fill_stream_encoding_from_caller_ycbcr422(9),
dm_test_fill_stream_encoding_from_caller_ycbcr444(9),
dm_test_fill_stream_hdmi_ep_clamps_depth(9),
dm_test_fill_stream_non_hdmi_ep_keeps_depth(9),
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), dm_test_detect_force_on(9),
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),
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),
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), 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),
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),
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),
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)

like… look at her go 🦋 that's the whole crew, every reference accounted for, we did not leave a single one on read 💀

ngl if you're here because you wanted a deep dive into crtc timing matching modes — this page is a test-function stub bestie, the SEE ALSO list is genuinely the main character. slay anyway 💅

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✨ and that's the page ✨ this iconic lil entry comes to you from ./drivers/gpu/drm/amd/display/... and is dated October 2026 — bye bestie, go write some tests, mwah 🎀💜