uvd_v3_1_ring_test_ring(9)

💅 uvd_v3_1_ring_test_ring — a Kernel API Manual moment (manual section 9, bestie)

okay so real talk, this is a page straight out of the Kernel API Manual, and it's about one tiny little function that does one tiny little thing. it's giving "small but mighty" energy, and honestly? we stan. 🤏✨

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🌸 NAME 🌸

uvd_v3_1_ring_test_ring — the register write test, aka the vibe check for your context register 💅

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✨ SYNOPSIS ✨

int uvd_v3_1_ring_test_ring (struct amdgpu_ring *ring );

that's it. that's the whole signature. one function, one pointer, one int coming back at you 🫶

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🎀 ARGUMENTS 🎀

• ring — an amdgpu_ring pointer, bestie. that's the whole description. it's a pointer to an amdgpu_ring and it's the only thing you're handing over 🌸

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🦋 DESCRIPTION 🦋

so what does it do, you ask? it tests if we can successfully write to the context register. that's the whole plot. no subplot, no twist, no cliffhanger. 😭

literally it goes "hey, can we write to the context register?" and then it reports back with an int. that's it. main character energy but make it minimal. 💀

ngl this is the kind of function that exists purely so the rest of the driver can find out if the hardware is actually listening to us. iconic behaviour, honestly. 👑

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🔥 SEE ALSO 🔥

• the kernel file lives right here: ./drivers/gpu/drm/amd/amdgpu/uvd_v3_1.c — go read it, iykyk 📖
• uvd_v3_1_ring_get_rptr(9)
• uvd_v3_1_ring_get_wptr(9)
• uvd_v3_1_ring_set_wptr(9)
• uvd_v3_1_ring_emit_ib(9)
• uvd_v3_1_ring_emit_fence(9)
• uvd_v3_1_mc_resume(9)
• uvd_v3_1_fw_validate(9)
• uvd_v3_1_start(9)
• uvd_v3_1_stop(9)
• uvd_v3_1_hw_init(9)
• uvd_v3_1_hw_fini(9)

the whole friend group, fr fr. go say hi to all of them 🫶💖

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okay that's the page!! mwah 💋 this one came from ./drivers/gpu/drm/amd/amdgpu, dated October 2026, and it lives in the Kernel API Manual. slay, periodt, see u next page 🎀✨🦋