ENUM WMI_BRIGHTNESS_SOURCE(9)

✨ enum wmi_brightness_source ✨

okay bestie, so this is a page from the Kernel API Manual (iconic little corner of the docs, honestly) and it's all about enum wmi_brightness_source — like, the whole entire lore of it 💅

Basically this is the backlight brightness control source selection enum. Which is a very fancy way of saying: "who's the main character holding the reins on your screen's glow-up?" 🔆👑

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🌸 NAME 🌸

enum wmi_brightness_source — backlight brightness control source selection 🎀

like, it's literally the enum that tells you which thing is out here controlling the brightness of the backlight. that's the vibe check. ✨

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🦋 SYNOPSIS 🦋

enum wmi_brightness_source {
    WMI_BRIGHTNESS_SOURCE_GPU ,
    WMI_BRIGHTNESS_SOURCE_EC ,
    WMI_BRIGHTNESS_SOURCE_AUX ,
    WMI_BRIGHTNESS_SOURCE_MAX

};

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💜 Constants 💜

so these are the members of the enum, and every single one of them is here, no cap:

• WMI_BRIGHTNESS_SOURCE_GPU — the GPU is the one running brightness duty. backlight brightness is controlled by the GPU. she's got the power 🖥️✨
• WMI_BRIGHTNESS_SOURCE_EC — the system's Embedded Controller (EC) is the one controlling the backlight brightness. team EC represent 🫶
• WMI_BRIGHTNESS_SOURCE_AUX — brightness is controlled over the DisplayPort AUX channel. fancy cable-based control, we love to see it 🌈
• WMI_BRIGHTNESS_SOURCE_MAX — -- undescribed -- 😭 yeah the original docs literally just say undescribed, so that's all we got, bestie. no further tea. it's giving mystery 🕵️‍♀️

lowkey a tiny note: the synopsis above is copied exactly, trailing commas and spacing and all — do not come for me, that's the source's formatting and I'm not touching it 🙈

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🧚 SEE ALSO 🧚

• Kernel file ./include/linux/platform_data/x86/nvidia-wmi-ec-backlight.h — like the actual header, go read it
• enum wmi_brightness_method(9) 🔥
• enum wmi_brightness_mode(9) ⭐
• struct wmi_brightness_args(9) 💀

basically the whole fam, iykyk 🫶

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okay and that's the whole page!! 💖 little sign-off for you: this mess lives in the kernel tree under ./include/linux/platform_data/x86, dated October 2026, and it carries the very cute header-and-footer combo of enum wmi_brightness_source(9) with "Kernel API Manual" — slay, era, periodt. stay glowing, bestie 🌟💅