dm_test_que...l_driver_ctx(9)

💅 NAME 💅

So bestie, gather round, because this one is dm_test_query_brightness_caps_null_driver_ctx — like, yes, that is genuinely the whole name, no I'm not kidding — and it's the KUnit test that checks what happens when you query brightness caps with a null driver ctx. Sponsor of the "what if the thing is NULL" cinematic universe. We're in the Kernel API Manual, babe, buckle up. 🎀

✨ SYNOPSIS ✨

void dm_test_query_brightness_caps_null_driver_ctx (struct kunit *test
);

Yes it's one function, yes it takes basically nothing, yes it returns void. Iconic behaviour honestly. 🦋

🌸 ARGUMENTS 🌸

• test — the KUnit test context, aka the little backpack of test state that KUnit hands you so the test can, y'know, be a test. 🎒✨

👑 SEE ALSO 👑

The whole friend group, in order, no cap — this one is literally part of a set:

• Kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_services_test.c 📁
• dm_test_get_elapse_time_zero_delta(9)
• dm_test_get_elapse_time_positive_delta(9)
• dm_test_get_elapse_time_large_delta(9)
• dm_test_get_elapse_time_wraparound(9)
• dm_test_perf_trace_timestamp_basic(9)
• dm_test_trace_smu_enter_null_ctx(9)
• dm_test_trace_smu_enter_with_params(9)
• dm_test_trace_smu_exit_success_null_ctx(9)
• dm_test_trace_smu_exit_failure_null_ctx(9)
• dm_test_trace_smu_exit_with_response(9)
• dm_test_query_brightness_caps_null_ctx(9)
• dm_test_query_brightness_caps_null_caps(9)
• dm_test_query_brightness_caps_lcd2_null_ctx(9)
• dm_test_query_brightness_caps_lcd1_success(9)
• dm_test_query_brightness_caps_non_lcd1_uses_second_slot(9)

Like, the null-check squad really said "we will test every single combination" and honestly? Respect. 🫶

ngl the whole energy here is "make sure the driver doesn't explode when someone hands it a NULL" and that is very much a main character move. 💀

okay that's the whole page bestie — this was pulled from ./drivers/gpu/drm/amd/display/..., it's from the Kernel API Manual, and it's dated October 2026. Slay, go read the source file, and hydrate. 💖✨🧚