vega20_ih_get_wptr(9)

💖 vega20_ih_get_wptr(9) — the kernel API manual, but make it cute ✨

okay so bestie, you're looking at vega20_ih_get_wptr from the kernel API manual, and honestly? it's a little function with main character energy. it lives in the amdgpu world and it's here to fetch your IH ring buffer's write pointer. let's get into it 🫶

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✨ NAME ✨

vega20_ih_get_wptr — get the IH ring buffer wptr 💅

🎀 SYNOPSIS 🎀

u32 vega20_ih_get_wptr (struct amdgpu_device *adev , struct
       amdgpu_ih_ring *ih );

like, it takes two pointers and hands you back a u32. no cap. ✨

🌸 ARGUMENTS 🌸

• adev — amdgpu_device pointer, aka your lil device handle 💖
• ih — amdgpu_ih_ring pointer, the ring buffer in question 🦋

💫 DESCRIPTION 💫

so what does it actually do? it gets the IH ring buffer wptr from either the register or the writeback memory buffer (VEGA20 — yes, that's the one, periodt). then it also checks for ring buffer overflow and deals with it, because that's just the kind of responsible icon it is 👑

and then? it returns the value of the wptr. that's the whole vibe. iykyk 💜

🔥 SEE ALSO 🔥

the kernel file lives at ./drivers/gpu/drm/amd/amdgpu/vega20_ih.c — go say hi to it, it's iconic 🌈

and here's the whole friend group, all of them literally so important:

• vega20_ih_init_register_offset(9)
• vega20_ih_toggle_ring_interrupts(9)
• vega20_ih_toggle_interrupts(9)
• vega20_ih_enable_ring(9)
• vega20_ih_irq_init(9)
• vega20_ih_irq_disable(9)
• vega20_ih_irq_rearm(9)
• vega20_ih_set_rptr(9)
• vega20_ih_self_irq(9)

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and that's the whole page bestie 🍓 this lil beauty comes from ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it's the vega20_ih_get_wptr(9) page — slay, go read the source, ily, bye 💖🧚‍♀️⭐