drm_edp_backlight_set_level(9)

📦 version 7.3.1, in nixpkgs unstable

✨ drm_edp_backlight_set_level(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for drm_edp_backlight_set_level — this is the little function that literally just... sets your eDP panel's backlight brightness, and it does it over AUX. slay. 💅

🌸 NAME 🌸

drm_edp_backlight_set_level — set the backlight level of an eDP panel via AUX 🎀

🦋 SYNOPSIS 🦋

int drm_edp_backlight_set_level (struct drm_dp_aux *aux , const struct drm_edp_backlight_info *bl , u32 level );

💖 ARGUMENTS 💖

  • aux — the DP AUX channel you're gonna use, like your lil communication pipe 🫶
  • bl — the backlight capability info you got from drm_edp_backlight_init, so it already knows what your panel can do
  • level — the brightness level you want to set, that's it, that's the whole vibe ✨

👑 DESCRIPTION 👑

so this one sets the brightness level of an eDP panel's backlight. simple queen behavior, no cap. 💅

⚠️ but listen — the panel's backlight must already have been enabled by the driver, by calling drm_edp_backlight_enable. like, don't come here before you've done that, it's not gonna go well bestie 😭

🌈 RETURN 🌈

0 on success 🎉 — and a negative error code on failure 💀

🧚 SEE ALSO 🧚

okay this list is long but we're getting through it together, fr fr. Kernel file ./drivers/gpu/drm/display/drm_dp_helper.c — and here's everyone else in the group chat:

that's the whole thing bestie, you ate that 🍓✨ and yeah, this page lives at ./drivers/gpu/drm/display, dated October 2026 — mwah, see you in the next manpage 💜🦋

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