dm_test_exec...ull_dmub_srv(9)

✨ dm_test_execute_dmub_cmd_null_dmub_srv ✨

okay so bestie, welcome to the Kernel API Manual 💖 you're literally reading the page for dm_test_execute_dmub_cmd_null_dmub_srv(9) and honestly? she's a whole vibe. very "testing the sad path" of you. let's get into it 🎀

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🌸 NAME 🌸

dm_test_execute_dmub_cmd_null_dmub_srv — a test that checks command execution fails when there's no DMUB service. no service, no slay, just a clean little failure. 💅

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🦋 SYNOPSIS 🦋

void dm_test_execute_dmub_cmd_null_dmub_srv (struct kunit *test );

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🎀 ARGUMENTS 🎀

• test — the KUnit test context, aka the little group-chat she's operating in. everything she needs to know about the test run lives here 🫶

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💜 DESCRIPTION 💜

so picture this: the context has no DC DMUB service on it. like, none. zero. absent. 🙈 and in that situation, dc_dmub_srv_cmd_run comes back with false — a big fat no — and then dm_execute_dmub_cmd propagates that failure right on up the chain. the failure gets passed along like a "hey bestie, this didn't work" text. that's literally the whole point of the test: confirming the failure travels correctly. no cap, that's it. ⭐

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🔥 SEE ALSO 🔥

🌈 Kernel file 🌈

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

👑 The rest of the friend group 👑

like the entire test suite said "we're all going in SEE ALSO" and honestly? iconic. here's every single one, in order, no skips:

• 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_init_check_failed(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_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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and that's the page, bestie 🧚 go forth and test your failure paths. mwah. 💋

signing off from ./drivers/gpu/drm/amd/display/..., dated October 2026, and yes the header title is literally dm_test_exec...ull_dmub_srv(9) because some of us get truncated by the terminal and we simply do not let it kill the vibe 🌸✨