STRUCT DPU_HW_SCALER3_CFG(9)

✨ struct dpu_hw_scaler3_cfg(9) ✨

Hey bestie! Welcome to the struct dpu_hw_scaler3_cfg page from the Kernel API Manual 💖. This is the whole vibe for QSEEDv3 configuration — like, the main character struct that holds all the scaling settings for the DPU. Let's get into it, no cap 🧚.

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🌸 NAME 🌸

struct dpu_hw_scaler3_cfg — QSEEDv3 configuration. That's it, that's the energy ✨.

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🎀 SYNOPSIS 🎀

struct dpu_hw_scaler3_cfg {
    u32 enable;
    u32 dir_en;
    int32_t init_phase_x[DPU_MAX_PLANES];
    int32_t phase_step_x[DPU_MAX_PLANES];
    int32_t init_phase_y[DPU_MAX_PLANES];
    int32_t phase_step_y[DPU_MAX_PLANES];
    u32 preload_x[DPU_MAX_PLANES];
    u32 preload_y[DPU_MAX_PLANES];
    u32 src_width[DPU_MAX_PLANES];
    u32 src_height[DPU_MAX_PLANES];
    u32 dst_width;
    u32 dst_height;
    u32 y_rgb_filter_cfg;
    u32 uv_filter_cfg;
    u32 alpha_filter_cfg;
    u32 blend_cfg;
    u32 lut_flag;
    u32 dir_lut_idx;
    u32 y_rgb_cir_lut_idx;
    u32 uv_cir_lut_idx;
    u32 y_rgb_sep_lut_idx;
    u32 uv_sep_lut_idx;
    u32 *dir_lut;
    size_t dir_len;
    u32 *cir_lut;
    size_t cir_len;
    u32 *sep_lut;
    size_t sep_len;
    struct dpu_hw_scaler3_de_cfg de;
    u32 dir_weight;
};

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💅 MEMBERS 💅

Okay so here's the whole squad — every single field explained, and yes we're going through all of them because details matter and we don't skip 🫶.

🌈 The Basics

• enable — the scaler enable switch. Lowkey the on/off button for the whole thing 🔥.
• dir_en — direction detection block enable. It's giving "do we detect direction or not" vibes 👑.

🌸 Phase Stuff (per-plane, because we're thorough)

• init_phase_x — horizontal initial phase. int32_t array over DPU_MAX_PLANES, okurr 💅.
• phase_step_x — horizontal phase step. Same array energy, int32_t[DPU_MAX_PLANES] 🎀.
• init_phase_y — vertical initial phase. int32_t[DPU_MAX_PLANES], yes bestie 💖.
• phase_step_y — vertical phase step. int32_t[DPU_MAX_PLANES], slay ✨.

🦋 Preloads & Dimensions

• preload_x — horizontal preload value. u32[DPU_MAX_PLANES], iconic 🌟.
• preload_y — vertical preload value. u32[DPU_MAX_PLANES], periodt 💀.
• src_width — source width. u32[DPU_MAX_PLANES] — gotta know how wide the source is fr fr.
• src_height — source height. u32[DPU_MAX_PLANES] — and how tall, obviously 🙈.
• dst_width — destination width. Just a u32, no array, we're keeping it simple here 🍓.
• dst_height — destination height. Also a plain u32, main character energy 👑.

🧚 Filter Configs — The Aesthetic Choices

• y_rgb_filter_cfg — y/rgb plane filter configuration. This is how we're filtering the luma/color, iykyk 🌈.
• uv_filter_cfg — uv plane filter configuration. Chroma vibes only 💜.
• alpha_filter_cfg — alpha filter configuration. For when transparency is the moment ✨.
• blend_cfg — blend coefficients configuration. Mixing it up, literally 🎀.

🔥 LUT Flags — The Big One

• lut_flag — scaler LUT update flags. Okay so this is a bitmask situation, and you know we have to list every bit:
  • 0x1 — swap LUT bank
  • 0x2 — update 2D filter LUT
  • 0x4 — update y circular filter LUT
  • 0x8 — update uv circular filter LUT
  • 0x10 — update y separable filter LUT
  • 0x20 — update uv separable filter LUT

Like, it's giving "I contain multitudes" 💅. No cap, these are the exact flags.

🫶 LUT Indices — The Address Book

• dir_lut_idx — 2D filter LUT index. Where's the 2D LUT at? Right here 🔍.
• y_rgb_cir_lut_idx — y circular filter LUT index. Found it 🎯.
• uv_cir_lut_idx — uv circular filter LUT index. Also found 💖.
• y_rgb_sep_lut_idx — y circular filter LUT index. (Yes, the manpage says "circular" here too — we're not fixing it, we're just reporting it, bestie 🙈.)
• uv_sep_lut_idx — uv separable filter LUT index. Separable and slay 🌸.

🌟 LUT Pointers & Lengths — The Actual Data

• dir_lut — pointer to 2D LUT. u32 *, it's just pointing at the good stuff 👉.
• dir_len — length for the dir_lut. size_t, because size matters 💀.
• cir_lut — pointer to circular filter LUT. u32 *, circular and cute 🌀.
• cir_len — length for the cir_lut. size_t, keeping it measured ✨.
• sep_lut — pointer to separable filter LUT. u32 *, separable supremacy 👑.
• sep_len — length for the sep_lut. size_t, and that's that 🎀.

🧚 Detail Enhancer & Directional Weight

• de — detail enhancer configuration. It's a struct dpu_hw_scaler3_de_cfg, so you know it's got its own whole vibe going on 🔥.
• dir_weight — Directional weight. u32, the final touch, the je ne sais quoi 💖.

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🔗 SEE ALSO 🔗

Like, go check these out, bestie — they're all connected and honestly iconic:

• Kernel file ./drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
• struct dpu_hw_blk(9)
• struct dpu_hw_scaler3_de_cfg(9)
• struct dpu_drm_pix_ext_v1(9)
• struct dpu_drm_de_v1(9)
• struct dpu_drm_scaler_v2(9)
• struct dpu_hw_qos_cfg(9)

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Okay that's the whole page, bestie! 💖 This was brought to you by the source at ./drivers/gpu/drm/msm/disp/dpu1 and it's dated October 2026 — like, future vibes but make it kernel. Stay scaley ✨💅🫶.