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Commit b875a5a5 authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Jiri Kosina
Browse files

input: add MT_TOOL_DIAL 



A dial is a tool you place on a multitouch surface which reports its
orientation or a relative angle of rotation when rotating its knob.

Some examples are the Dell Totem (on the Canvas 27"), the Microsoft Dial,
or the Griffin Powermate, though the later can't be put on a touch surface.

We give some extra space to account for other types of fingers if we need
(MT_TOOL_THUMB)

Slightly change the documentation to not make it mandatory to update each
MT_TOOL we add.

Reviewed-by: default avatarPeter Hutterer <peter.hutterer@who-t.net>
Acked-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 092150a2

Documentation/input/multi-touch-protocol.rst

+6 −6
Original line number Diff line number Diff line
@@ -310,12 +310,12 @@ ABS_MT_TOOL_Y 
ABS_MT_TOOL_TYPE

    The type of approaching tool. A lot of kernel drivers cannot distinguish

    between different tool types, such as a finger or a pen. In such cases, the

    event should be omitted. The protocol currently supports MT_TOOL_FINGER,

    MT_TOOL_PEN, and MT_TOOL_PALM [#f2]_. For type B devices, this event is

    handled by input core; drivers should instead use

    input_mt_report_slot_state(). A contact's ABS_MT_TOOL_TYPE may change over

    time while still touching the device, because the firmware may not be able

    to determine which tool is being used when it first appears.

    event should be omitted. The protocol currently mainly supports

    MT_TOOL_FINGER, MT_TOOL_PEN, and MT_TOOL_PALM [#f2]_.

    For type B devices, this event is handled by input core; drivers should

    instead use input_mt_report_slot_state(). A contact's ABS_MT_TOOL_TYPE may

    change over time while still touching the device, because the firmware may

    not be able to determine which tool is being used when it first appears.



ABS_MT_BLOB_ID

    The BLOB_ID groups several packets together into one arbitrarily shaped

include/uapi/linux/input.h

+5 −4
Original line number Diff line number Diff line
@@ -270,10 +270,11 @@ struct input_mask { 
/*

 * MT_TOOL types

 */

#define MT_TOOL_FINGER		0

#define MT_TOOL_PEN		1

#define MT_TOOL_PALM		2

#define MT_TOOL_MAX		2

#define MT_TOOL_FINGER		0x00

#define MT_TOOL_PEN		0x01

#define MT_TOOL_PALM		0x02

#define MT_TOOL_DIAL		0x0a

#define MT_TOOL_MAX		0x0f



/*

 * Values describing the status of a force-feedback effect