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authorDmitry Torokhov <dmitry.torokhov@gmail.com>2017-04-06 20:23:39 -0400
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-04-17 23:19:12 -0400
commit6c6d5752da5c9594e527e81062180bcf814ef1a0 (patch)
tree2ea40c7932d766fc5c4fdb5b2d080b620e094171 /Documentation/input/multi-touch-protocol.rst
parent4c79e98be5a9c0bf8fce183cfbe63624514502ef (diff)
Input: docs - note that MT-A protocol is obsolete
Everyone should be using multitouch protocol B (slotted) now. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/input/multi-touch-protocol.rst')
-rw-r--r--Documentation/input/multi-touch-protocol.rst6
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/input/multi-touch-protocol.rst b/Documentation/input/multi-touch-protocol.rst
index 81775d7c1997..8035868c56bc 100644
--- a/Documentation/input/multi-touch-protocol.rst
+++ b/Documentation/input/multi-touch-protocol.rst
@@ -22,6 +22,9 @@ describes how to send the raw data for all contacts to the receiver. For
22devices capable of tracking identifiable contacts (type B), the protocol 22devices capable of tracking identifiable contacts (type B), the protocol
23describes how to send updates for individual contacts via event slots. 23describes how to send updates for individual contacts via event slots.
24 24
25.. note::
26 MT potocol type A is obsolete, all kernel drivers have been
27 converted to use type B.
25 28
26Protocol Usage 29Protocol Usage
27-------------- 30--------------
@@ -400,9 +403,6 @@ in a finger packet must not be recognized as single-touch events.
400For type A devices, all finger data bypasses input filtering, since 403For type A devices, all finger data bypasses input filtering, since
401subsequent events of the same type refer to different fingers. 404subsequent events of the same type refer to different fingers.
402 405
403For example usage of the type A protocol, see the bcm5974 driver. For
404example usage of the type B protocol, see the hid-egalax driver.
405
406.. [#f1] Also, the difference (TOOL_X - POSITION_X) can be used to model tilt. 406.. [#f1] Also, the difference (TOOL_X - POSITION_X) can be used to model tilt.
407.. [#f2] The list can of course be extended. 407.. [#f2] The list can of course be extended.
408.. [#f3] The mtdev project: http://bitmath.org/code/mtdev/. 408.. [#f3] The mtdev project: http://bitmath.org/code/mtdev/.