STRUCT CEC_PIN_OPS(9)

💅 struct cec_pin_ops(9) 💅

okay so this is from the Kernel API Manual, bestie — it's the page about struct cec_pin_ops, and it's literally the low-level CEC pin operations. no cap, this is the good stuff.

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✨ NAME ✨

struct cec_pin_ops — low-level CEC pin operations 🎀

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🦋 SYNOPSIS 🦋

here's the whole struct, exactly as it lives, don't touch a character:

struct cec_pin_ops {
    int (*read)(struct cec_adapter *adap);
    void (*low)(struct cec_adapter *adap);
    void (*high)(struct cec_adapter *adap);
    bool (*enable_irq)(struct cec_adapter *adap);
    void (*disable_irq)(struct cec_adapter *adap);
    void (*free)(struct cec_adapter *adap);
    void (*status)(struct cec_adapter *adap, struct seq_file *file);
    int (*read_hpd)(struct cec_adapter *adap);
    int (*read_5v)(struct cec_adapter *adap);
    int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
};

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🌸 Members 🌸

okay now let's meet the whole cast, one by one, main character energy only:

• read — reads the CEC pin, iconic behaviour. it returns > 0 if the pin is high, 0 if it's low, or an error if the return is negative. 🫶
• low — drives the CEC pin low. that's it, that's the job.
• high — stops driving the CEC pin. then the pull-up drives the pin high — unless someone else is out here driving the pin low, in which case, not so much. 💀
• enable_irq — optional! turns on the interrupt so you can detect changes in pin voltage. ✨
• disable_irq — optional! turns that interrupt back off.
• free — optional. frees any allocated resources. it gets called when the adapter is deleted, so like, cleanup era. 🧹
• status — optional, logs status information. very "let me tell you what's going on" of it.
• read_hpd — optional. reads the HPD pin. returns > 0 if high, 0 if low, or an error if negative.
• read_5v — optional. reads the 5V pin. returns > 0 if high, 0 if low, or an error if negative.
• received — optional. the high-level CEC message callback, and it's the one that lets the driver process CEC messages. lowkey the moment of the whole struct. 🔥

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💜 Description 💜

so the tea is: these operations — except for the received op, bestie, pay attention — are used by the cec pin framework to manipulate the CEC pin. that's the whole vibe check. 👑

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🌈 SEE ALSO 🌈

go look at the kernel file ./include/media/cec-pin.h, plus:

• cec_pin_changed(9)
• cec_pin_allocate_adapter(9)

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and that's the page!! 🎀 sign-off time: this one lives in ./include/media, dated October 2026 — mwah, slay, periodt. 💖🦋✨