dm_ism_next_state(9)

🌸 dm_ism_next_state — the manual page bestie 💅

okay so this is dm_ism_next_state(9) from the Kernel API Manual, and honestly? it's giving tiny-but-important. it's the little FSM brain cell that decides where the idle state management machine goes next, and you're gonna understand it in like two minutes fr fr 🫶

---

✨ NAME ✨

dm_ism_next_state — Get next state based on current state and event 🌈

✨ SYNOPSIS ✨

bool dm_ism_next_state (enum amdgpu_dm_ism_state current_state , enum
amdgpu_dm_ism_event event , enum amdgpu_dm_ism_state *next_state );

like, look at her. three args, returns a bool. no cap, she's bool-coded 💜

✨ ARGUMENTS ✨

• current_state — the current ISM state. where the FSM is right now, bestie 🎀
• event — the event being processed. this is the thing that showed up to the party and wants to move the state machine along 🔥
• next_state — a place to store the next state. you hand her a pointer, she writes the answer in there, that's the whole vibe 💫

✨ DESCRIPTION ✨

so this function defines the idle state management FSM. that's Finite State Machine for anyone who was about to ask 🙈 — the whole map of "if you're here and this happens, you go there" energy.

the tea ☕: invalid transitions are ignored and will not progress the FSM. so if you try to slide from a state into somewhere it's not allowed to go? nothing happens. the FSM just ✨ does not move ✨. she's unbothered, she's protected, she's not taking your nonsense transition. periodt 💅

lowkey important: "ignored" means ignored — the state machine stays exactly where it is, no progress, no drama 👑

✨ SEE ALSO ✨

go read the rest of the family, they're all iconic in their own way 🦋

• the kernel file ./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.c — literally the source, go look at her 💖
• dm_ism_get_idle_allow_delay(9)
• dm_ism_insert_record(9)
• amdgpu_dm_ism_disable(9)
• amdgpu_dm_ism_force_full_power(9)
• amdgpu_dm_ism_enable(9)

---

and that's the whole page bestie, mwah 🍓

cute little sign-off: this one came out of ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — same page name, dm_ism_next_state(9), still slaying ⭐🧚‍♀️