Hello all, I'm working to support HID over GATT (HoG), which is HID over Bluetooth Low Energy links, both on kernel and userspace. Traffic coming from the remote peripheral through a L2CAP socket will be handled in usespace, where the HID input reports are decapsulated from GATT and injected back into the kernel through the new uHID module written by David Herrmann. This module works similar to uinput, but dealing with HID traffic. The input part is working without problems and now I looking how to support Output and Feature reports. Doing some basic testing it seems we don't support Output reports very well. A basic use-case for that is synchronizing keyboard leds (CAPS, NUM, etc) when there is more than one keyboard connected, and I couldn't get this to work on my tests. I didn't try to test feature reports since it's still not very clear to me when they're used. The HID spec says that they exist for setting values/controls on the peripheral that are not visible to the user, but I haven't discovered any real-world use case for them. What is the current state for these reports, do we support them somehow? Also, I've found usbhid-dump by Greg K-H, but it doesn't seem to dump data coming from the host to the device. Is this on the plans for this tool? I can try to send a patch for it, if someone can guide me on how this whole output/feature reports thing should work. -- João Paulo Rechi Vita Openbossa Labs - INdT -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
