smu_dpm_set_power_gate(9)

💖 smu_dpm_set_power_gate(9) 💖

okay so welcome to smu_dpm_set_power_gate(9), straight outta the Kernel API Manual — this is your girl's guide to gating and ungating a specific IP block, and yes we're gonna slay it ✨

---

🌸 NAME 🌸

smu_dpm_set_power_gate — power gate/ungate the specific IP block 👑

---

🦋 SYNOPSIS 🦋

int smu_dpm_set_power_gate (void *handle , uint32_t block_type , bool
gate , int inst );

---

🎀 ARGUMENTS 🎀

• handle — the smu_context pointer, iconic, the main character of this whole function ngl 🫶
• block_type — which IP block we're power gating/ungating, iykyk
• gate — if it's true we power gate it, otherwise we ungate it. literally that simple 💅
• inst — which instance of the IP block we're power gating/ungating, like which copy bestie 🌈

---

✨ DESCRIPTION ✨

so this API uses no smu->mutex lock protection, and before you come for her, here's exactly why:

1. It's either called by another IP block (gfx/sdma/vcn/uvd/vce) — and that call is guarded to be race condition free by the caller. so the caller's got her back, no cap 💜
2. Or it gets called on a user setting request of power_dpm_force_performance_level. In that case, the smu->mutex lock protection is already enforced on the parent API smu_force_performance_level of the call path. so like, it's handled upstream, we're good 🔥

fr fr though, don't go thinking you should add your own locking casually — this page is telling you why she doesn't need it in these two cases 😭

---

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

• smu_set_user_clk_dependencies(9)
• smu_restore_dpm_user_profile(9)
• smu_alloc_memory_pool(9)
• smu_wbrf_handle_exclusion_ranges(9)
• smu_wbrf_event_handler(9)
• smu_wbrf_delayed_work_handler(9)
• smu_wbrf_support_check(9)
• smu_wbrf_init(9)
• smu_wbrf_fini(9)
• smu_get_ppt_limit(9)
• smu_reset_sdma_is_supported(9)

---

and that's the whole page bestie, you ate that 🍓

signing off from ./drivers/gpu/drm/amd/pm/swsmu — that's the source, the version is the Kernel API Manual, and this cutie's dated October 2026 💅✨ see you in the next manpage mwah 😭💖