amdgpu_pll_get_fb_ref_div(9)

✨ amdgpu_pll_get_fb_ref_div ✨

okay so bestie, welcome to the kernel API manual for amdgpu_pll_get_fb_ref_div(9) — yes that's the whole vibe, it's a function about dividers, and honestly? we're gonna make it cute 💅

🌸 NAME 🌸

amdgpu_pll_get_fb_ref_div — feedback and ref divider calculation 🎀

🦋 SYNOPSIS 🦋

void amdgpu_pll_get_fb_ref_div (struct amdgpu_device *adev , unsigned
int nom , unsigned int den , unsigned int post_div , unsigned int
fb_div_max , unsigned int ref_div_max , unsigned int *fb_div , unsigned
int *ref_div );

like, it returns void — so it doesn't hand you anything back directly, it writes into the pointers you give it. classic. 🫶

💖 ARGUMENTS 💖

• adev — amdgpu_device pointer. it's the device, the whole main character basically 👑
• nom — nominator
• den — denominator
• post_div — post divider
• fb_div_max — feedback divider maximum, as in: don't go past this, fr fr 🙈
• ref_div_max — reference divider maximum, same energy, this is the ceiling ⭐
• fb_div — resulting feedback divider (this is where the answer goes ✨)
• ref_div — resulting reference divider (and here's the other answer 🎀)

🌈 DESCRIPTION 🌈

Calculate feedback and reference divider for a given post divider. and then — key detail, don't miss it — it makes sure we stay within the limits ✅

so like, you pass in what you want, and it does the math and keeps everything inside the maximums you gave it. lowkey the responsible friend of the group. no cap. 💜

🔥 SEE ALSO 🔥

• Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_pll.c
• amdgpu_pll_reduce_ratio(9)
• amdgpu_pll_compute(9)
• amdgpu_pll_get_use_mask(9)
• amdgpu_pll_get_shared_dp_ppll(9)
• amdgpu_pll_get_shared_nondp_ppll(9)

the whole friend group, honestly — go read them too, iykyk 🧚

okay that's the whole page bestie!! this one lives in ./drivers/gpu/drm/amd/amdgpu, it's dated October 2026, and it's the amdgpu_pll_get_fb_ref_div(9) Kernel API Manual entry. slay, go compute some dividers 💅💖🌸