dm_test_dmub...check_failed(9)

💅 dm_test_dmub...check_failed(9) — yes bestie, that's the whole name, we're in the Kernel API Manual 🎀

Okay so real talk, this is a kernel API manpage, section 9, and the star of the show has a name that ate and left no crumbs: dm_test_dmub_hw_resume_init_check_failed. Say it three times fast, I dare you. 🫶

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✨ NAME ✨

dm_test_dmub_hw_resume_init_check_failed — the test that checks resume doesn't absolutely lose it when an init check fails 💀

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🌸 SYNOPSIS 🌸

void dm_test_dmub_hw_resume_init_check_failed (struct kunit *test );

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🦋 ARGUMENTS 🦋

• test — the KUnit test context, i.e. the little vibe-check container the test framework hands you. Your whole world for the duration of the test, ngl.

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💖 DESCRIPTION 💖

So picture this: the DMUB service is not software-initialized (yes, that's the setup, it's on purpose, slay). Because of that, the init-state query fails. And then resume just… keeps going anyway, straight into dm_dmub_hw_init, which also fails. Two fails, one function call. 😭

Here's the part that matters: the call must warn and return without crashing. That's the entire assignment. Warn, return, no crash. Periodt. 👑

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🔥 SEE ALSO 🔥

Kernel file:

./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_dmub_test.c

And now, the friend group — the whole crew of related tests, all of them, no cap, in the exact order the manpage lists them 🧚:

• dm_test_register_dmub_notify_callback_null_callback(9)
• dm_test_register_dmub_notify_callback_type_out_of_range(9)
• dm_test_register_dmub_notify_callback_valid(9)
• dm_test_register_dmub_notify_callback_offload_false(9)
• dm_test_dmub_aux_setconfig_callback_copies_and_completes(9)
• dm_test_dmub_aux_setconfig_callback_non_aux_no_complete(9)
• dm_test_dmub_aux_setconfig_callback_aux_with_null_dm_notify(9)
• dm_test_dmub_aux_setconfig_callback_set_config_reply(9)
• dm_test_dmub_aux_fused_io_callback_copies_reply_and_completes(9)
• dm_test_dmub_aux_fused_io_callback_max_ddc_line(9)
• dm_test_dmub_aux_fused_io_callback_null_args(9)
• dm_test_get_default_ips_mode_dcn35(9)
• dm_test_get_default_ips_mode_dcn351(9)
• dm_test_get_default_ips_mode_dcn36(9)
• dm_test_get_default_ips_mode_older_than_dcn35(9)
• dm_test_get_default_ips_mode_newer_default(9)
• dm_test_dmub_hw_init_no_dmub_srv(9)
• dm_test_dmub_hw_init_no_fb_info(9)
• dm_test_dmub_hw_init_no_firmware(9)
• dm_test_dmub_hw_init_success_fake_dmub(9)
• dm_test_dmub_hw_init_no_hw_support(9)
• dm_test_dmub_hw_init_bss_data(9)
• dm_test_dmub_hw_init_hw_init_fails(9)
• dm_test_dmub_hw_init_auto_load_timeout(9)
• dm_test_dmub_hw_init_apu_dpia_dcn35(9)
• dm_test_dmub_hw_init_sanity_checks_dcn31(9)
• dm_test_dmub_hw_init_sanity_checks_dcn314(9)
• dm_test_dmub_hw_init_dmcu_abm(9)
• dm_test_dmub_hw_resume_no_dmub_srv(9)
• dm_test_dmub_hw_resume_initialized_dmub(9)
• dm_test_dmub_hw_resume_full_init(9)
• dm_test_dmub_hw_resume_auto_load_timeout(9)
• dm_test_dmub_sw_init_unsupported_asic(9)
• dm_test_init_microcode_unsupported_asic(9)
• dm_test_dmub_get_vbios_bounding_box_default_null(9)
• dm_test_execute_dmub_cmd_null_dmub_srv(9)
• dm_test_process_dmub_aux_transfer_sync_engine_acquire(9)
• dm_test_process_dmub_aux_transfer_sync_protocol_error(9)
• dm_test_process_dmub_aux_transfer_sync_copies_data(9)
• dm_test_process_dmub_aux_transfer_sync_zero_length(9)
• dm_test_process_dmub_set_config_sync_unknown_error(9)
• dm_test_abort_fused_io_no_dmub_srv(9)

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That's the whole page, bestie — go forth and warn without crashing 💜

Huge kiss goodbye from the source line at ./drivers/gpu/drm/amd/display/..., stamped October 2026, same dm_test_dmub...check_failed(9) energy from top to bottom. 🍓⭐