arm64: dts: qcom: Add backlight support for eDP panel #216
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On most platforms, UEFI firmware enables the backlight chip by default, so the kernel does not need to re-enable it. However, on certain images, UEFI fails to initialize the backlight, resulting in a blank eDP screen after boot. This patch adds kernel-side backlight control for eDP panels to ensure proper display functionality across all meta images, regardless of UEFI behavior. Tested on Hamoa EVK with multiple Ubuntu meta builds. Signed-off-by: Yongxing Mou <[email protected]>
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On most platforms, UEFI firmware enables the backlight chip by default, so the kernel does not need to re-enable it. However, on certain images, UEFI fails to initialize the backlight, resulting in a blank eDP screen after boot.
This patch adds kernel-side backlight control for eDP panels to ensure proper display functionality across all meta images, regardless of UEFI behavior.
Tested on Hamoa EVK with multiple Ubuntu meta builds.