Hello, I am a hobbyist developer who has been working on a project to create a new Rust HID device driver and the needed core abstractions for writing more HID device drivers in Rust. My goal is to support the USB Monitor Control Class needed for functionality such as backlight control for monitors like the Apple Studio Display and Apple Pro Display XDR. A new backlight API will be required to support multiple backlight instances and will be mapped per DRM connector. The current backlight API is designed around the assumption of only a single internal panel being present. I am currently working on making this new API for DRM in parallel to my work on the HID side of the stack for supporting these displays. https://binary-eater.github.io/tags/usb-monitor-control/ Julius Zint had attempted to do so a year ago with a C HID driver but was gated by the lack of an appropriate backlight API for external displays. I asked him for permission to do the work need in Rust and plan to accredit him for the HID report handling for backlight in the USB Monitor Control Class standard. https://lore.kernel.org/lkml/f95da7ff-06dd-2c0e-d563-7e5ad61c3bcc@xxxxxxxxxx/ I was hoping to get initial feedback on this work to make sure I am on the right path for making a Rust HID abstraction that would be acceptable upstream. The patches compile with WERROR being disabled. This is necessary since Rust treats missing documentation comments as warnings (which is a good thing). I also need to go in and add more SAFETY comments. Thanks, Rahul Rameshbabu Rahul Rameshbabu (3): rust: core abstractions for HID drivers rust: hid: USB Monitor Control Class driver rust: hid: demo the core abstractions for probe and remove drivers/hid/Kconfig | 16 ++ drivers/hid/Makefile | 1 + drivers/hid/hid_monitor_control.rs | 42 +++++ rust/bindings/bindings_helper.h | 1 + rust/kernel/hid.rs | 245 +++++++++++++++++++++++++++++ rust/kernel/lib.rs | 2 + 6 files changed, 307 insertions(+) create mode 100644 drivers/hid/hid_monitor_control.rs create mode 100644 rust/kernel/hid.rs -- 2.47.2
