drm_panel_of_backlight(9)

📦 version 7.3.1, in nixpkgs unstable

💖 drm_panel_of_backlight(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for drm_panel_of_backlight, and yes it's a real function and yes it's lowkey iconic. it does exactly one job and it does it slayfully: it wires up your backlight from a device tree node. let's get into it 🎀

✨ NAME ✨

drm_panel_of_backlight — use backlight device node for backlight 🌸

✨ SYNOPSIS ✨

int drm_panel_of_backlight (struct drm_panel *panel );

✨ ARGUMENTS ✨

  • panel — the DRM panel 🫶 literally just your panel, that's it, that's the whole argument.

✨ DESCRIPTION ✨

okay so here's the vibe 💅 use this function to enable backlight handling if your panel uses device tree and has a backlight phandle. both of those, no cap.

When the panel is enabled, backlight will be enabled after a successful call to drm_panel_funcs.enable. ✨ order matters, it's giving choreography.

When the panel is disabled, backlight will be disabled before the call to drm_panel_funcs.disable. 🔥 so it's reversed on the way out, and that's on purpose, periodt.

A typical implementation for a panel driver supporting device tree will call this function at probe time. 👑 and then? backlight will be handled transparently without requiring any intervention from the driver. not me being fully hands-off 😭 like it just handles itself, main character energy fr fr.

✨ RETURN ✨

0 on success, or a negative error code on failure 💀 (so like, always check it, bestie, do not skip the vibe check).

✨ SEE ALSO ✨

🧚 go read all of those, iykyk. the panel family is big and every single one of them ate. 🌈

and that's the page, bestie 💜 this one lives over in ./drivers/gpu/drm and it's dated October 2026 ⭐ — go forth and enable some backlights, you absolute icon 👑💅

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