backlight_get_brightness(9)

✨ backlight_get_brightness(9) ✨

okay so this one lives in the Kernel API Manual bestie, and it's literally the glow-up function for your backlight 💖

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🌸 NAME 🌸

backlight_get_brightness — returns the current brightness value ✨ (yes that's the whole job, and it ate)

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🎀 SYNOPSIS 🎀

int backlight_get_brightness (const struct backlight_device *bd );

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🦋 ARGUMENTS 🦋

• bd — the backlight device 🫶 like, the actual screen-brightness guy you're asking about

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💅 DESCRIPTION 💅

So the way this works: it returns the current brightness value, but taking in consideration the current state — she's not just blindly reading a number, she's doing a vibe check first 👑

If backlight_is_blank returns true, then return 0 as brightness. Otherwise, return the current brightness property value. That's it, that's the whole personality 🌈

Backlight drivers are expected to use this function in their update_status operation to get the brightness value 🧚 Like, that's the assignment, that's where she belongs, no cap 💜

ngl this one is lowkey iconic for how much it does with so little — main character energy in four lines of C 😌

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⭐ SEE ALSO ⭐

• Kernel file ./include/linux/backlight.h 🍓
• enum backlight_update_reason(9)
• enum backlight_type(9)
• struct backlight_ops(9)
• struct backlight_properties(9)
• struct backlight_device(9)
• backlight_update_status(9)
• backlight_enable(9)
• backlight_disable(9)
• backlight_is_blank(9)
• bl_get_data(9)

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and that's the page fr fr 💖 this cutie comes from ./include/linux, dated October 2026, and it's serving Kernel API Manual realness — go read the backlight header bestie, it's giving ✨🦋🌸💅