[Qemu-devel] [PATCH v2 0/2] hw/usb/dev-hid: Make usb-tablet work with OS X/macOS guests

[Phil Dennis-Jordan <phil@philjordan.eu>]

This series makes the Qemu usb-tablet work correctly with OS X/macOS guests without the need for a special guest driver.

 * The usb-tablet should not have a boot protocol of 2. Other OSes seem to ignore this, but the IOHIDFamily driver stack chokes on it for anything but conventional (relative motion) mice.
 * A "mac_compat" boolean option is added to the usb-tablet, which changes its report descriptor to specify a usage of 0x02 (mouse) instead of 0x01 (pointer). This is required for correct operation in the Mac HID driver stack.

Changelog
=========

v1 -> v2:
 * v1 Thread was "[PATCH] hw/usb/dev-hid: add a Mac guest compatibility option to usb-tablet"
 * Always apply the boot protocol (bInterfaceProtocol) change to usb-tablet, not just when the Mac compatibility option is active. The original value of 0x02 was determined to be incorrect according to the spec anyway.
 * As the boot protocol change is permanent, separate interface and device descriptor constants for the Mac/non-Mac variants of the tablet are no longer required, and have been removed.

Phil Dennis-Jordan (2):
  hw/usb/dev-hid: set bInterfaceProtocol to 0x00 for usb-tablet
  hw/usb/dev-hid: add a usb-tablet Mac guest compatibility option

 hw/usb/dev-hid.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

-- 
2.3.2 (Apple Git-55)