Complete rewrite of [1]. Instead of a USB driver it`s now a HID driver and will work without being part of the early boot environment. The driver is no longer heavily tied to the Apple Studio Display, but should work with all HID devices, that expose a report containing fields with the Monitor - Brightness HID usage value. [1] https://lore.kernel.org/dri-devel/20230701120806.11812-1-julius@xxxxxxx/ Julius Zint (1): backlight: hid_bl: Add VESA virtual control panel HID backlight driver drivers/video/backlight/Kconfig | 8 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/hid_bl.c | 267 +++++++++++++++++++++++++++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/video/backlight/hid_bl.c base-commit: a33677b9211b6c328ad359b072043af94f7c9592 -- 2.41.0
