STRUCT VP9_DRAM_BUF(9)

💖 struct vp9_dram_buf(9) 💖

okay so bestie, welcome to Kernel API Manual — section 9, kernel developer's corner, pull up a chair 🫶. Today's main character is struct vp9_dram_buf, which — as the name lowkey spoils — holds the buffer info for the vpu. That's it, that's the whole vibe. Let's get into it ✨

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🌸 NAME 🌸

struct vp9_dram_buf — literally contains buffer info for vpu. no cap, that's the entire job description 💅

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🦋 SYNOPSIS 🦋

struct vp9_dram_buf {
    unsigned long va;
    unsigned long pa;
    unsigned int sz;
    unsigned int padding;
 };

look at her. four fields. immaculate. no notes 👑

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🎀 Members 🎀

• va — the cpu address 🧠. that's the one your cpu knows and loves.
• pa — the iova address 🔥. yes, iova, not pa-pa — write it down, it's on the test.
• sz — buffer size 📏. how big the thing is.
• padding — for 64 bytes alignment ✨. it's giving "personal space, but make it divisible by 64."

fr fr bestie, keep that padding field. alignment does not play around 😭

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💜 SEE ALSO 💜

• Kernel file 🗂️
• ./drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_if.c — the actual source file, go read her, she's iconic 📖
• struct vp9_fb_info(9) 🍓
• struct vp9_ref_cnt_buf(9) 🌈
• struct vp9_ref_buf(9) 🧚
• struct vp9_sf_ref_fb(9) ⭐

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that's the whole page bestie, you ate that 💅✨

🌷 mwah, signed off with love — source ./drivers/media/platform/media..., October 2026, and yes she's still struct vp9_dram_buf(9) till the very last line 💖