STRUCT IMG_IR_DECODER(9)

💅 struct img_ir_decoder(9) — the kernel API manual, bestie edition

okay so listen up 🫶 this one's from the Kernel API Manual and it's literally the whole scoop on struct img_ir_decoder — the decoder settings for an IR protocol. yes, that IR. remotes. the lil guy on your couch. let's get into it ✨

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✨ NAME ✨

struct img_ir_decoder — the decoder settings for an IR protocol, periodt 💅

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🌸 SYNOPSIS 🌸

struct img_ir_decoder {
    u64 type;
    unsigned int                    tolerance;
    unsigned int                    unit;
    struct img_ir_timings           timings;
    struct img_ir_timings           rtimings;
    unsigned int                    repeat;
    struct img_ir_control           control;
    int (*scancode)(int len, u64 raw, u64 enabled_protocols, struct
img_ir_scancode_req *request);
    int (*filter)(const struct rc_scancode_filter *in, struct
img_ir_filter *out, u64 protocols);
 };

look at her. iconic. a whole struct just vibing there 🌈

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🎀 Members 🎀

time for the member-by-member vibe check, iykyk 👑

• type — a bitmap of the protocol types. yes, plural, she's multifaceted 💖
• tolerance — timing tolerance, expressed as a percentage (the default is 10% — she's generous but not too generous).
• unit — the unit that timings are measured in, in nanoseconds (default is 1 us, so don't come at her with anything else without reading the docs first).
• timings — the primary timings. the main character timings, if you will ⭐
• rtimings — additional override timings, used while she's waiting for repeats. like a special little outfit change 🔥
• repeat — the maximum repeat interval (always in milliseconds — not nanoseconds, not vibes, milliseconds 💀).
• control — the control flags.
• scancode — a pointer to a function that converts the IR data into a scancode. and listen — it must be safe to execute in interrupt context 🙈 that's not optional, that's the rule. she returns IMG_IR_SCANCODE to emit a new scancode, returns IMG_IR_REPEATCODE to repeat the previous code, and returns -errno (e.g. -EINVAL) on error. so like, three whole moods 💅
• filter — a pointer to a function that converts a scancode filter into a raw hardware filter. heads up: the minlen and maxlen fields will have already been initialised to the maximum range before your function even gets to peek at them 👀

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🦋 SEE ALSO 🦋

go read these next, bestie, they're all in the family 🫶 — the kernel file ./drivers/media/rc/img-ir/img-ir-hw.h, plus:

• struct img_ir_control(9)
• struct img_ir_timing_range(9)
• struct img_ir_symbol_timing(9)
• struct img_ir_free_timing(9)
• struct img_ir_timings(9)
• struct img_ir_filter(9)
• struct img_ir_timing_regvals(9)
• struct img_ir_scancode_req(9)
• struct img_ir_reg_timings(9)
• struct img_ir_priv_hw(9)

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and that's the whole page, no notes 💜 this lil beauty ships out of ./drivers/media/rc/img-ir and the manual's dated October 2026 — go off, king 👑✨