STRUCT DPU_PERF_CFG(9)

💖 struct dpu_perf_cfg(9) — Kernel API Manual 💖

okay so welcome to the Kernel API Manual, bestie! We're looking at struct dpu_perf_cfg — the performance control settings struct. It's giving "all the knobs for bandwidth, latencies, LUTs, and CDP configs," and we are obsessed. ✨

🌸 NAME 🌸

struct dpu_perf_cfg — performance control settings. Here's the full field roster from the NAME section, with every description kept intact. Yes, the NAME text literally has @min_core_ib twice, and no, I'm not fixing it — facts are facts, bestie 💅.

• @max_bw_low — the low threshold of maximum bandwidth, in kbps.
• @max_bw_high — the high threshold of maximum bandwidth, in kbps.
• @min_core_ib — minimum bandwidth for core, in kbps.
• @min_core_ib — yep, same name again: minimum mnoc ib vote, in kbps.
• @min_llcc_ib — minimum llcc ib vote, in kbps.
• @min_dram_ib — minimum dram ib vote, in kbps.
• @undersized_prefill_lines — undersized prefill, in lines.
• @xtra_prefill_lines — extra prefill latency, in lines.
• @dest_scale_prefill_lines — destination scaler latency, in lines.
• @macrotile_perfill_lines — macrotile latency, in lines. (The NAME text says perfill here; the struct member says prefill. Both are exactly as written, no cap.)
• @yuv_nv12_prefill_lines — yuv_nv12 latency, in lines.
• @linear_prefill_lines — linear latency, in lines.
• @downscaling_prefill_lines — downscaling latency, in lines.
• @amortizable_theshold — minimum y position for traffic shaping prefill. (Spelled theshold in the NAME text; the struct member is amortizable_threshold with threshold. Iconic little typo moment.)
• @min_prefill_lines — minimum pipeline latency, in lines.
• @clk_inefficiency_factor — DPU src clock inefficiency factor.
• @bw_inefficiency_factor — DPU axi bus bw inefficiency factor.

✨ SYNOPSIS ✨

This is the whole struct, exactly as it appears in the manual:

struct dpu_perf_cfg {
    u32 max_bw_low;
    u32 max_bw_high;
    u32 min_core_ib;
    u32 min_llcc_ib;
    u32 min_dram_ib;
    u32 undersized_prefill_lines;
    u32 xtra_prefill_lines;
    u32 dest_scale_prefill_lines;
    u32 macrotile_prefill_lines;
    u32 yuv_nv12_prefill_lines;
    u32 linear_prefill_lines;
    u32 downscaling_prefill_lines;
    u32 amortizable_threshold;
    u32 min_prefill_lines;
    u32 clk_inefficiency_factor;
    u32 bw_inefficiency_factor;
    u32 safe_lut_tbl[DPU_QOS_LUT_USAGE_MAX];
    u32 danger_lut_tbl[DPU_QOS_LUT_USAGE_MAX];
    struct dpu_qos_lut_tbl qos_lut_tbl[DPU_QOS_LUT_USAGE_MAX];
    struct dpu_perf_cdp_cfg cdp_cfg[DPU_PERF_CDP_USAGE_MAX];
};

👑 Members 👑

• safe_lut_tbl — LUT tables for safe signals. 🫶
• danger_lut_tbl — LUT tables for danger signals. 🔥
• qos_lut_tbl — LUT tables for QoS signals. 🎀
• cdp_cfg — cdp use case configurations. 🦋

🌈 SEE ALSO 🌈

Kernel file ./drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h — that's the source file, and the cross-reference friend group is:

• struct dpu_scaler_blk(9)
• struct dpu_pp_blk(9)
• struct dpu_dsc_blk(9)
• struct dpu_sspp_v13_rec_blk(9)
• enum dpu_qos_lut_usage(9)
• struct dpu_qos_lut_entry(9)
• struct dpu_qos_lut_tbl(9)
• struct dpu_rotation_cfg(9)
• struct dpu_caps(9)
• struct dpu_sspp_sub_blks(9)
• struct dpu_lm_sub_blks(9)
• struct dpu_dspp_sub_blks(9)
• struct dpu_dsc_sub_blks(9)
• struct dpu_sspp_cfg(9)
• struct dpu_lm_cfg(9)
• struct dpu_dspp_cfg(9)
• struct dpu_pingpong_cfg(9)
• struct dpu_merge_3d_cfg(9)
• struct dpu_dsc_cfg(9)
• struct dpu_intf_cfg(9)
• struct dpu_wb_cfg(9)
• struct dpu_vbif_dynamic_ot_cfg(9)
• struct dpu_vbif_dynamic_ot_tbl(9)
• struct dpu_vbif_qos_tbl(9)
• struct dpu_vbif_cfg(9)
• struct dpu_cdm_cfg(9)
• struct dpu_perf_cdp_cfg(9)
• struct dpu_mdss_version(9)
• struct dpu_mdss_cfg(9)

okay that's the whole page, bestie — source/version path is ./drivers/gpu/drm/msm/disp/dpu1, the date on this one is October 2026, and the page is struct dpu_perf_cfg(9). bye bestie, go config those perf knobs 💅✨