STRUCT C3_ISP_PARAMS_PST_GAMMA(9)

🎀 struct c3_isp_params_pst_gamma — the kernel API manual, bestie edition 🎀

okay so you're here for struct c3_isp_params_pst_gamma, and honestly? iconic of you. this is the Post gamma configuration struct, and it lives in the kernel API manual (section 9, kernel docs energy). let's get into it ✨

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🌸 NAME 🌸

struct c3_isp_params_pst_gamma — Post gamma configuration 💅

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✨ SYNOPSIS ✨

struct c3_isp_params_pst_gamma {
    struct c3_isp_params_block_header header;
    __u16 lut[129];
    __u16 reserved[3];
 };

that's the whole vibe right there. three members, no notes 🫶

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🦋 Members 🦋

• header — the C3 ISP parameters block header, literally the main character energy of this struct 🎀
• lut — the lookup table for P-Stitch gamma, values [0..1023] 🌈
• reserved — applications must zero this array. no cap, zero it. 🙈

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💖 Description 💖

so this struct is what lets you configure the lookup table for post gamma. the gamma curve is made of 129 points, which is exactly why you need to set lut[129] — all 129 of them, not 128, not 130, do not come for me 🔥

and listen, header.type should be set to C3_ISP_PARAMS_BLOCK_PST_GAMMA, which comes from c3_isp_params_block_type. iykyk 💅

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👑 SEE ALSO 👑

the kernel file lives at ./include/uapi/linux/media/amlogic/c3-isp-config.h — go read it, it's giving lore 🧚

and while you're in the neighborhood, say hi to the whole friend group:

• struct c3_isp_awb_zone_stats(9)
• struct c3_isp_awb_stats(9)
• struct c3_isp_ae_zone_stats(9)
• struct c3_isp_ae_stats(9)
• struct c3_isp_af_zone_stats(9)
• struct c3_isp_af_stats(9)
• struct c3_isp_stats_info(9)
• enum c3_isp_params_buffer_version(9)
• enum c3_isp_params_block_type(9)
• c3_isp_params_block_header(9)
• struct c3_isp_params_awb_gains(9)
• enum c3_isp_params_awb_tap_points(9)
• struct c3_isp_params_awb_config(9)
• enum c3_isp_params_ae_tap_points(9)
• struct c3_isp_params_ae_config(9)
• enum c3_isp_params_af_tap_points(9)
• struct c3_isp_params_af_config(9)
• struct c3_isp_params_ccm(9)
• struct c3_isp_params_csc(9)
• struct c3_isp_params_blc(9)
• C3_ISP_PARAMS_MAX_SIZE(9)
• struct c3_isp_params_cfg(9)

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okay that's the whole page, bestie!! you ate that 💅✨ source file: ./include/uapi/linux/media/aml... and the version date is October 2026 — mwah, see you in the kernel docs 🫶🎀