vcn_v4_0_5_u...ing_set_wptr(9)
π vcn_v4_0_5_unified_ring_set_wptr(9)
okay so bestie, welcome to the Kernel API Manual β¨ β this one's from the vcn_v4_0_5 chapter of the AMDGPU cinematic universe, and honestly? it's a short one but she serves.
πΈ NAME πΈ
vcn_v4_0_5_unified_ring_set_wptr β set enc write pointer π―
like. that's her whole job. setting the enc write pointer. and she does it flawlessly, no cap.
β¨ SYNOPSIS β¨
void vcn_v4_0_5_unified_ring_set_wptr (struct amdgpu_ring *ring );
returns void β nothing comes back, it's giving "i did my thing, don't @ me" energy π
π ARGUMENTS π
ringβ anamdgpu_ringpointer π. that's the whole parameter list. one (1) ring. she's lowkey minimalist like that.
π¦ DESCRIPTION π¦
Commits the enc write pointer to the hardware π₯
that's it. that's the vibe. it takes the write pointer and commits it β pushes it out to the actual hardware. no extra steps, no drama, just pure main character energy making sure the hardware knows exactly where the write pointer is at π«Ά
ngl this is the kind of function that just... does the thing. queen behavior π
π SEE ALSO π
the saga continues over in the kernel file ./drivers/gpu/drm/amd/amdgpu/vcn_v4_0_5.c π β and honestly the whole friend group is listed below, so go say hi:
vcn_v4_0_5_early_init(9)vcn_v4_0_5_sw_init(9)vcn_v4_0_5_sw_fini(9)vcn_v4_0_5_hw_init(9)vcn_v4_0_5_hw_fini(9)vcn_v4_0_5_suspend(9)vcn_v4_0_5_resume(9)vcn_v4_0_5_mc_resume(9)vcn_v4_0_5_mc_resume_dpg_mode(9)vcn_v4_0_5_disable_static_power_gating(9)vcn_v4_0_5_enable_static_power_gating(9)vcn_v4_0_5_disable_clock_gating(9)vcn_v4_0_5_disable_clock_gating_dpg_mode(9)vcn_v4_0_5_enable_clock_gating(9)vcn_v4_0_5_start_dpg_mode(9)vcn_v4_0_5_start(9)vcn_v4_0_5_stop_dpg_mode(9)vcn_v4_0_5_stop(9)vcn_v4_0_5_pause_dpg_mode(9)vcn_v4_0_5_unified_ring_get_rptr(9)vcn_v4_0_5_unified_ring_get_wptr(9)vcn_v4_0_5_set_unified_ring_funcs(9)vcn_v4_0_5_is_idle(9)vcn_v4_0_5_wait_for_idle(9)vcn_v4_0_5_set_clockgating_state(9)vcn_v4_0_5_process_interrupt(9)vcn_v4_0_5_set_irq_funcs(9)
(also yes, vcn_v4_0_5_unified_ring_get_wptr(9) is right there two entries up β she has a getter, this page is the setter. matching set, iconic π)
and that's the whole page bestie!! π§ this little legend lives in ./drivers/gpu/drm/amd/amdgpu, dated October 2026, filed under vcn_v4_0_5_u...ing_set_wptr(9) β the ellipsis is doing a lot of heavy lifting but we respect the truncation ππ
mwah, go commit that write pointer π
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms