dm_test_dmu...nit_bss_data(9)

🌸 dm_test_dmub_hw_init_bss_data(9) 🌸

okay bestie, welcome to the Kernel API Manual 💖 you're literally reading a page about a KUnit test, and honestly? she's a baddie. let's get into it.

---

✨ NAME ✨

dm_test_dmub_hw_init_bss_data — the test that checks hw init actually copies BSS data into FB memory 🫶

---

🦋 SYNOPSIS 🦋

void dm_test_dmub_hw_init_bss_data (struct kunit *test );

---

🎀 ARGUMENTS 🎀

• test — the KUnit test context, aka the group-chat she's being tested in 💅

---

👑 DESCRIPTION 👑

so here's the vibe: when the DMUB firmware declares a non-zero BSS data size, dm_dmub_hw_init should copy that whole region into the BSS framebuffer window. that's it. that's the whole flex. no cap, this test is just making sure the copy actually happens ✨

---

🔥 SEE ALSO 🔥

⭐ Kernel file

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

🧚 the whole squad (yes, all of them, i would never leave anyone out)

• 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_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_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)

---

ngl bestie, this test only has one argument and zero drama. she's lowkey iconic for that 💀

---

🌈 okay that's the page!! sourced from ./drivers/gpu/drm/amd/display/..., dated October 2026, and that's the whole thing fr fr. go forth and slay your kernel tests, mwah 💅💖🌸