dm_test_ism...ent_no_state(9)

💅 dm_test_ism_commit_event_no_state — the Kernel API Manual page, but make it make sense 🎀

okay bestie so this is a page from the Kernel API Manual, and the function it's hyping up is dm_test_ism_commit_event_no_state — yes the title is doing that truncated dm_test_ism...ent_no_state(9) thing, that's just how the header renders, don't let it vibe-check you into confusion. It's a kernel test. It's iconic. Let's get into it. ✨

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🌸 NAME 🌸

dm_test_ism_commit_event_no_state — literally just "commit_event returns early without a crtc state". That's the whole personality. No state, no problem, no FSM movement. Periodt. 💅

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🦋 SYNOPSIS 🦋

void dm_test_ism_commit_event_no_state (struct kunit *test );

that's it, that's the whole signature, keep it exactly like that please and thank you 🫶

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✨ ARGUMENTS ✨

• test — the KUnit test context. Your lil test harness bestie that carries everything the test needs. 🎀

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💖 DESCRIPTION 💖

okay so picture this: the CRTC has no atomic state — like, base.state == NULL, absolutely nothing there, the state is not in its main character era 😭 — and when that happens, the function takes the NO_STATE early-return path.

and the FSM? the FSM is left completely untouched. not a single transition, not a single update. it just chills. the way that the function sees NULL and goes "nope, we're out" — honestly slay 🙈✨

so this test is checking that exact vibe: no state in, early return out, FSM unbothered. no cap. 🔥

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👑 SEE ALSO 👑

go read the actual kernel file bestie, it's right here:

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

and then the whole friend group of related tests, all of them, no skips, we don't gatekeep 🌈:

• dm_test_ism_idle_delay_entry_count_exceeds_history_size(9)
• dm_test_ism_init_sets_initial_state(9)
• dm_test_ism_fini_after_init(9)
• dm_test_ism_set_last_idle_ts_updates_timestamp(9)
• dm_test_ism_insert_record_basic(9)
• dm_test_ism_insert_record_wraps_around(9)
• dm_test_ism_trigger_event_valid_transition(9)
• dm_test_ism_trigger_event_invalid_transition(9)
• dm_test_dispatch_next_event_hyst_wait_no_delay(9)
• dm_test_dispatch_next_event_hyst_wait_with_delay(9)
• dm_test_dispatch_next_event_opt_idle_no_sso_delay(9)
• dm_test_dispatch_next_event_opt_idle_with_sso_delay(9)
• dm_test_dispatch_next_event_timer_aborted(9)
• dm_test_dispatch_next_event_no_action_state(9)
• dm_test_ism_commit_event_cursor_transition(9)
• dm_test_ism_commit_event_invalid_event(9)
• dm_test_ism_force_full_power(9)
• dm_test_ism_disable_enable_cycle(9)
• dm_test_ism_dispatch_hysteresis_schedule_and_cancel(9)
• dm_test_ism_dispatch_optimized_idle_defers_sso(9)

like that's the entire squad, go read them all, iykyk 💜

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and that's the page!! 🧚 source is ./drivers/gpu/drm/amd/display/..., dated October 2026, filed under dm_test_ism...ent_no_state(9) — mwah, love that for us, see you in the next man page bestie 💕🍓