linux-toradex.git/drivers/input/input-mt.c, branch v3.7

Input: MT - document new 'flags' argument of input_mt_init_slots()

2012-11-10T08:39:47+00:00

Fixes new kernel-doc warning in input-mt.c:

Warning(drivers/input/input-mt.c:38): No description found for parameter
'flags'

Reported-by: Randy Dunlap 
Signed-off-by: Henrik Rydberg 
Signed-off-by: Dmitry Torokhov

Input: MT - Allow legacy pressure computation

2012-09-19T17:50:19+00:00

Some drivers like to report ABS_PRESSURE in a special way.
Allow this when ABS_MT_PRESSURE is not defined.

Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: MT - Get slot by key

2012-09-19T17:50:19+00:00

Some devices use an internal key for tracking which cannot be directly
mapped to slots. This patch provides a key-to-slot mapping, which can
be used by drivers of such devices.

Reviewed-and-tested-by: Benjamin Tissoires 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: MT - Add in-kernel tracking

2012-09-19T17:50:19+00:00

With the INPUT_MT_TRACK flag set, the function input_mt_assign_slots()
can be used to match a new set of contacts against the currently used
slots. The algorithm used is based on Lagrange relaxation, and performs
very well in practice; slower than mtdev for a few corner cases, but
faster in most commonly occuring cases.

Tested-by: Benjamin Tissoires 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: MT - Handle frame synchronization in core

2012-09-19T17:50:19+00:00

Most MT drivers perform the same actions on frame synchronization.
Some actions, like dropping unseen contacts, are also unnecessarily
complex. Collect common frame synchronization tasks in a new function,
input_mt_sync_frame(). Depending on the flags set, it drops unseen
contacts and performs pointer emulation.

With init flags and frame synchronization in place, most MT drivers
can be simplified. First out are the bcm5974 and hid-multitouch
drivers, following this patch.

Reviewed-and-tested-by: Benjamin Tissoires 
Tested-by: Ping Cheng 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: MT - Add flags to input_mt_init_slots()

2012-09-19T17:50:18+00:00

Preparing to move more repeated code into the mt core, add a flags
argument to the input_mt_slots_init() function.

Reviewed-and-tested-by: Benjamin Tissoires 
Tested-by: Ping Cheng 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: Improve the events-per-packet estimate

2012-09-19T17:50:17+00:00

The events-per-packet estimate has so far been used by MT devices
only. This patch adjusts the packet buffer size to also accomodate the
KEY and MSC events.  Keyboards normally send one or two keys at a
time. MT devices normally send a number of button keys along with the
MT information.  The buffer size chosen here covers those cases, and
matches the default buffer size in evdev. Since the input estimate is
now preferred, remove the special input-mt estimate.

Reviewed-and-tested-by: Ping Cheng 
Tested-by: Benjamin Tissoires 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: Break out MT data

2012-09-19T17:50:17+00:00

Move all MT-related things to a separate place. This saves some
bytes for non-mt input devices, and prepares for new MT features.

Reviewed-and-tested-by: Benjamin Tissoires 
Tested-by: Ping Cheng 
Acked-by: Dmitry Torokhov 
Signed-off-by: Henrik Rydberg

Input: MT - fix null pointer warning

2012-06-04T14:33:34+00:00

Fixes the following sparse warning:
drivers/input/input-mt.c:138:40: warning: Using plain integer as NULL pointer

Signed-off-by: Sachin Kamat 
Signed-off-by: Henrik Rydberg

drivers/input: add export.h to symbol exporting files.

2011-10-31T23:31:16+00:00

These files are not modules but are exporting symbols and/or
making use of THIS_MODULE macro.

Signed-off-by: Paul Gortmaker