vcn_v4_0_5_is_idle(9)

💖 vcn_v4_0_5_is_idle — bestie's guide to the Kernel API Manual ✨

okay so this is a page from the Kernel API Manual, section 9, and the star of the show is vcn_v4_0_5_is_idle(9). she's a lil function, she checks a thing, and honestly? she ate. let's get into it 🎀

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🌸 NAME 🌸

vcn_v4_0_5_is_idle — literally just checks if the VCN block is idle. that's the whole vibe check, no cap 💅

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✨ SYNOPSIS ✨

bool vcn_v4_0_5_is_idle (struct amdgpu_ip_block *ip_block );

she returns a bool, she takes one arg, she's lowkey minimal about it. iconic.

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🦋 ARGUMENTS 🦋

• ip_block — a pointer to the struct amdgpu_ip_block structure. that's it, that's the whole input. she just needs the pointer and she'll take it from there 🫶

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💜 DESCRIPTION 💜

so what does she do? she checks whether the VCN block is idle. that's the assignment, and she understood it fr fr. like, is the VCN block chilling or not — that's the question she answers 🌈

ngl it's a short description because it's a short job. not every function needs a whole character arc bestie 😭

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👑 SEE ALSO 👑

the whole friend group, gathered here for you. every single one of these is family 🍓

• the Kernel file — ./drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c (that's where she lives, go say hi)
• vcn_v4_0_5_early_init(9) — the early birdie
• vcn_v4_0_5_sw_init(9) — software setup szn
• vcn_v4_0_5_sw_fini(9) — software wrap-up szn
• vcn_v4_0_5_hw_init(9) — hardware setup szn
• vcn_v4_0_5_hw_fini(9) — hardware wrap-up szn
• vcn_v4_0_5_suspend(9) — nap time
• vcn_v4_0_5_resume(9) — wakey wakey
• vcn_v4_0_5_mc_resume(9) — the memory-controller-flavored resume
• vcn_v4_0_5_mc_resume_dpg_mode(9) — same but in DPG mode, she's versatile
• vcn_v4_0_5_disable_static_power_gating(9) — turning the power gate OFF
• vcn_v4_0_5_enable_static_power_gating(9) — turning the power gate back ON
• vcn_v4_0_5_disable_clock_gating(9) — clocks, ungated
• vcn_v4_0_5_disable_clock_gating_dpg_mode(9) — the DPG-mode edition of the above
• vcn_v4_0_5_enable_clock_gating(9) — clocks, gated again
• vcn_v4_0_5_start_dpg_mode(9) — starting up in DPG mode
• vcn_v4_0_5_start(9) — just start already
• vcn_v4_0_5_stop_dpg_mode(9) — stopping, DPG flavor
• vcn_v4_0_5_stop(9) — the classic stop
• vcn_v4_0_5_pause_dpg_mode(9) — hold up a sec (DPG)
• vcn_v4_0_5_unified_ring_get_rptr(9) — grab the read pointer
• vcn_v4_0_5_unified_ring_get_wptr(9) — grab the write pointer
• vcn_v4_0_5_unified_ring_set_wptr(9) — set the write pointer
• vcn_v4_0_5_set_unified_ring_funcs(9) — wire up the ring funcs
• vcn_v4_0_5_wait_for_idle(9) — the patient sibling of our girl here, she waits instead of just checking 👀
• vcn_v4_0_5_set_clockgating_state(9) — clock gating state, set
• vcn_v4_0_5_process_interrupt(9) — handling the interrupt business
• vcn_v4_0_5_set_irq_funcs(9) — irq funcs, wired

like i said. the whole group chat 💖

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lowkey reminder: this page only documents the idle check. if you're looking for the version that actually waits around for idleness, that's vcn_v4_0_5_wait_for_idle(9) — different girl, different job, both iconic 💅

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and that's the page!! mwah 💋 this one lives under ./drivers/gpu/drm/amd/amdgpu, dated October 2026 — so mark your calendars bestie, she's fresh 🌸✨🫶