STRUCT PANTHOR_DEVFREQ(9)

💅 struct panthor_devfreq(9) — the Kernel API Manual, but make it cute

okay so bestie, welcome to struct panthor_devfreq, aka Device frequency management ✨ this is the little struct that keeps track of how hard your GPU is working so the kernel can vibe-check its clock speed accordingly. it's giving "middle management for your GPU's energy levels" 🎀

---

✨ NAME ✨

struct panthor_devfreq — Device frequency management 👑

---

🦋 SYNOPSIS 🦋

here's the whole struct, exactly as it is, no cap:

struct panthor_devfreq {
    struct devfreq *devfreq;
    struct devfreq_simple_ondemand_data gov_data;
    ktime_t busy_time;
    ktime_t idle_time;
    ktime_t time_last_update;
    bool last_busy_state;
    spinlock_t lock;
 };

look at her. seven fields. main character energy fr fr 💅

---

🌸 Members 🌸

okay so let's go through the squad one by one, iykyk:

• devfreq — the devfreq device. literally the whole point, she's the icon 👑
• gov_data — Governor data. that's the governor's business, not ours 🫶
• busy_time — Busy time. how much time the GPU spent grinding 🔥
• idle_time — Idle time. how much time it spent chilling 😴
• time_last_update — Last update time. the timestamp from the last time we refreshed the state, so we know how much has changed since ⭐
• last_busy_state — true if the GPU was busy last time we updated the state. yes it's a bool, yes it's literally just a memory of "was she busy tho" 🙈
• lock — the lock used to protect busy_time, idle_time, time_last_update and last_busy_state. four fields, one lock, very protective bestie behavior 🎀

💀 hi bestie, important note: these fields can be accessed concurrently by panthor_devfreq_get_dev_status and panthor_devfreq_record_{busy,idle}(). so like, that's why the lock is there. do not skip the lock. the lock is not optional. periodt.

---

🔥 SEE ALSO 🔥

• Kernel file ./drivers/gpu/drm/panthor/panthor_devfreq.c — go read the source, it slays 🧚

---

and that's the page!! 🦋 one last thing — this beauty lives in ./drivers/gpu/drm/panthor, dated October 2026, and it's the struct panthor_devfreq(9) manpage 💖 mwah, go forth and frequency-manage responsibly ✨🌈