Commit 48144e83 authored by José Expósito's avatar José Expósito Committed by Jiri Kosina
Browse files

HID: uclogic: Support HUION devices with up to 20 buttons 

The HID descriptor for HUION tablets was limited to 13 buttons. However,
there are devices with more buttons in their frames.

So far, the device with more buttons released by HUION is the Huion
Kamvas Pro 24 (GT-240, QHD) [1], with 20 buttons.

Tweak the HID descriptor to support it.

Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/989

  [1]
Signed-off-by: default avatarJosé Expósito <jose.exposito89@gmail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.com>
parent 70ec81c2

drivers/hid/hid-uclogic-rdesc.c

+3 −3
Original line number Diff line number Diff line
@@ -689,10 +689,10 @@ const size_t uclogic_rdesc_v2_pen_template_size = 
	0xA0,           /*      Collection (Physical),          */ \

	0x05, 0x09,     /*          Usage Page (Button),        */ \

	0x19, 0x01,     /*          Usage Minimum (01h),        */ \

	0x29, 0x03,     /*          Usage Maximum (03h),        */ \

	0x95, 0x03,     /*          Report Count (3),           */ \

	0x29, 0x0A,     /*          Usage Maximum (0Ah),        */ \

	0x95, 0x0A,     /*          Report Count (10),          */ \

	0x81, 0x02,     /*          Input (Variable),           */ \

	0x95, ((_size) * 8 - 45),                                  \

	0x95, ((_size) * 8 - 52),                                  \

			/*          Report Count (padding),     */ \

	0x81, 0x01,     /*          Input (Constant),           */ \

	0xC0,           /*      End Collection,                 */ \