dm_test_read..._i2c_failure(9)
π dm_test_read..._i2c_failure β Kernel API Manual β¨
okay so real talk, the page title is literally dm_test_read..._i2c_failure with the dots and everything (yes, the truncation is intentional, she's mysterious like that) and this whole thing lives in the Kernel API Manual. Buckle up bestie, this one's short but it's a whole vibe. π¦
πΈ NAME πΈ
dm_test_read_mccs_caps_i2c_failure β no cap, this is literally just: Test VCP request retry failure. That's the whole job description. She tests what happens when a VCP request retries and it flops. π
β¨ SYNOPSIS β¨
void dm_test_read_mccs_caps_i2c_failure (struct kunit *test );
that's it. that's the whole signature. she takes one (1) thing and returns void, because she's a KUnit test and she doesn't need to give anything back, she's just here to observe. main character energy fr. π
π ARGUMENTS π
testβ the KUnit test context. that's the only thing she wants from you. hand her the test context and she'll do her little retry-failure arc, tyvm π«Ά
π§ SEE ALSO π§
okay so this is the part where the page just goes off. like, there is a Kernel file involved first:
./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c
and then bestie... the entire friend group. every single one. lowkey iconic that they listed all of them, and I'm putting all of them here because we do not skip people in this house π
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_update_branch_bandwidth_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_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)
fr fr that's the whole extended universe. click through them at your own risk, bestie, it's a rabbit hole and every single one of them is a KUnit test. π³οΈπ
and that's the page!! π this gem ships out of ./drivers/gpu/drm/amd/display/... (that's the source path, she's shy about the full thing on the footer, same energy as the truncated title tbh π), dated October 2026, and she signs off as dm_test_read..._i2c_failure(9) because consistency is a lifestyle. mwah, go write some tests, ily. πβ¨
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