linux-toradex.git/drivers/input/evdev.c, branch T20_LinuxImageV2.0_20130305

Input: evdev - Add ioctl to block suspend while event queue is not empty.

2012-02-03T13:55:30+00:00

Add an ioctl, EVIOCSSUSPENDBLOCK, to enable a wakelock that will block
suspend while the event queue is not empty. This allows userspace code to
process input events while the device appears to be asleep.

The current code holds the wakelock for up 5 seconds for every input
device and client. This can prevent suspend if sensor with a high data
rate is active, even when that sensor is not capable of waking the
device once it is suspended.

(cherry picked from commit 4dc43d7079bdae572212368e1d29abea0177c932 from
android.googlesource.com/common.git)

Signed-off-by: Arve Hjønnevåg 
Signed-off-by: Varun Wadekar 
Change-Id: I160d2afe77aa76c9d2bbe01cd4b81434201361a9
Reviewed-on: http://git-master/r/78895
Reviewed-by: Automatic_Commit_Validation_User

Input: evdev - Don't hold wakelock when no data is available to user-space

2012-02-03T13:55:18+00:00

If there is no SYN_REPORT event in the buffer the buffer data is invisible
to user-space. The wakelock should not be held in this case.

(cherry picked from commit 7cc846069a8a9116d8c81526c459070eed0e3477 from
android.googlesource.com/common.git)

Signed-off-by: Arve Hjønnevåg 
Signed-off-by: Varun Wadekar 
Change-Id: I7555b190ff8e4e526291dd353c3c0291b05dfff2
Reviewed-on: http://git-master/r/78894
Reviewed-by: Automatic_Commit_Validation_User

input: evdev: Initialize retval to zero

2012-01-13T21:42:48+00:00

In evdev_read() the local variable retval is not initialized.
If this variable is not initialized then in case of NONBLOCK READ
retval will have invalid value.

Bug: 922453
Change-Id: I534cbfacf8a0514fcb5bc481a98d0e94a4d73b04
Signed-off-by: Preetham Chandru R 
Reviewed-on: http://git-master/r/74898
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Varun Wadekar 
Reviewed-by: Sanjay Singh Rawat 
Tested-by: Sanjay Singh Rawat 
Reviewed-by: Shashank Sharma 
Reviewed-by: Yogish Kulkarni 
Reviewed-by: Kiran Adduri

input: evdev: do not block waiting for an event if fd is nonblock

2011-12-01T05:39:10+00:00

If there is a full packet in the buffer, and we overflow that buffer
right after checking for that condition, it would have been possible
for us to block indefinitely (rather, until the next full packet) even if
the file was marked as O_NONBLOCK.

Change-Id: Icd0f59f8cc98392be4c4d13bd45b5cf94317eb5a
Signed-off-by: Dima Zavin

input: evdev: if no events and non-block, return EAGAIN not 0

2011-12-01T05:39:09+00:00

Change-Id: I5f0da721f74e5de111cffc7e7b375b72dd80e530
Signed-off-by: Dima Zavin

input: evdev: only allow reading events if a full packet is present

2011-12-01T05:39:09+00:00

Without this, it was possible for the reader to get ahead of packet_head.
If the the input device generated a partial packet *right* after the
reader got ahead, then we can get into a situation where the device is
marked readable but read always returns 0 until the next packet is
finished (i.e a SYN is generated by the input driver).

This situation can also happen if we overflow the buffer while a reader
is trying to read an event out.

Change-Id: If01ab371bc7de1bf1f90c122dcc5a29242b01a09
Signed-off-by: Dima Zavin

input: evdev: Add missing wake_lock_destroy

2011-12-01T05:38:27+00:00

Change-Id: Ief1ef44d98a197e5b457f5e8617c413e76e3c6d2
Signed-off-by: Benoit Goby

input: evdev: Use unique wakelock names

2011-12-01T05:37:54+00:00

wakelock names are now contain evdev->name and pid

Signed-off-by: Mike Chan

Input: Use monotonic time for event time stamps.

2011-12-01T05:37:54+00:00

Since wall time can jump backwards, it cannot be used to determine if one
event occured before another or for how long a key was pressed.

Signed-off-by: Arve Hjønnevåg

Input: Hold wake lock while event queue is not empty.

2011-12-01T05:37:54+00:00

Allows userspace code to process input events while
the device appears to be asleep.

Signed-off-by: Arve Hjønnevåg