linux-toradex.git/drivers/input, branch v3.17.4

Input: alps - ignore bad data on Dell Latitudes E6440 and E7440

2014-11-21T17:23:13+00:00

commit a7ef82aee91f26da79b981b9f5bca43b8817d3e4 upstream.

Sometimes on Dell Latitude laptops psmouse/alps driver receive invalid ALPS
protocol V3 packets with bit7 set in last byte. More often it can be
reproduced on Dell Latitude E6440 or E7440 with closed lid and pushing
cover above touchpad.

If bit7 in last packet byte is set then it is not valid ALPS packet. I was
told that ALPS devices never send these packets. It is not know yet who
send those packets, it could be Dell EC, bug in BIOS and also bug in
touchpad firmware...

With this patch alps driver does not process those invalid packets, but
instead of reporting PSMOUSE_BAD_DATA, getting into out of sync state,
getting back in sync with the next byte and spam dmesg we return
PSMOUSE_FULL_PACKET. If driver is truly out of sync we'll fail the checks
on the next byte and report PSMOUSE_BAD_DATA then.

Signed-off-by: Pali Rohár 
Tested-by: Pali Rohár 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: alps - allow up to 2 invalid packets without resetting device

2014-11-21T17:23:13+00:00

commit 9d720b34c0a432639252f63012e18b0507f5b432 upstream.

On some Dell Latitude laptops ALPS device or Dell EC send one invalid byte
in 6 bytes ALPS packet. In this case psmouse driver enter out of sync
state. It looks like that all other bytes in packets are valid and also
device working properly. So there is no need to do full device reset, just
need to wait for byte which match condition for first byte (start of
packet). Because ALPS packets are bigger (6 or 8 bytes) default limit is
small.

This patch increase number of invalid bytes to size of 2 ALPS packets which
psmouse driver can drop before do full reset.

Resetting ALPS devices take some time and when doing reset on some Dell
laptops touchpad, trackstick and also keyboard do not respond. So it is
better to do it only if really necessary.

Signed-off-by: Pali Rohár 
Tested-by: Pali Rohár 
Reviewed-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: alps - ignore potential bare packets when device is out of sync

2014-11-21T17:23:12+00:00

commit 4ab8f7f320f91f279c3f06a9795cfea5c972888a upstream.

5th and 6th byte of ALPS trackstick V3 protocol match condition for first
byte of PS/2 3 bytes packet. When driver enters out of sync state and ALPS
trackstick is sending data then driver match 5th, 6th and next 1st bytes as
PS/2.

It basically means if user is using trackstick when driver is in out of
sync state driver will never resync. Processing these bytes as 3 bytes PS/2
data cause total mess (random cursor movements, random clicks) and make
trackstick unusable until psmouse driver decide to do full device reset.

Lot of users reported problems with ALPS devices on Dell Latitude E6440,
E6540 and E7440 laptops. ALPS device or Dell EC for unknown reason send
some invalid ALPS PS/2 bytes which cause driver out of sync. It looks like
that i8042 and psmouse/alps driver always receive group of 6 bytes packets
so there are no missing bytes and no bytes were inserted between valid
ones.

This patch does not fix root of problem with ALPS devices found in Dell
Latitude laptops but it does not allow to process some (invalid)
subsequence of 6 bytes ALPS packets as 3 bytes PS/2 when driver is out of
sync.

So with this patch trackstick input device does not report bogus data when
also driver is out of sync, so trackstick should be usable on those
machines.

Signed-off-by: Pali Rohár 
Tested-by: Pali Rohár 
Reviewed-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: synaptics - add min/max quirk for Lenovo T440s

2014-11-21T17:23:12+00:00

commit e4742b1e786ca386e88e6cfb2801e14e15e365cd upstream.

The new Lenovo T440s laptop has a different PnP ID "LEN0039", and it
needs the similar min/max quirk to make its clickpad working.

BugLink: https://bugzilla.opensuse.org/show_bug.cgi?id=903748
Reported-and-tested-by: Joschi Brauchle 
Signed-off-by: Takashi Iwai 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: i8042 - quirks for Fujitsu Lifebook A544 and Lifebook AH544

2014-11-14T18:10:26+00:00

commit 993b3a3f80a7842a48cd46c2b41e1b3ef6302468 upstream.

These models need i8042.notimeout, otherwise the touchpad will not work.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=69731
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1111138
Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: alps - fix v4 button press recognition

2014-11-14T18:10:26+00:00

commit b0cfb794a3dd1d699f3e453f9180bd06508fb8f0 upstream.

Since the change to struct input_mt_pos some variables are now bitfields
instead of integers. Automatic conversion from integer to bitfield entry
destroys information, therefore enforce boolean interpretation instead.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1114768
Fixes: 02d04254a5df ("Input: alps - use struct input_mt_pos to track coordinates")
Signed-off-by: Andreas Bosch 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: i8042 - add noloop quirk for Asus X750LN

2014-11-14T18:10:26+00:00

commit 9ff84a17302aeb8913ff244ecc0d8f9d219fecb5 upstream.

Without this the aux port does not get detected, and consequently the
touchpad will not work.

https://bugzilla.redhat.com/show_bug.cgi?id=1110011

Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Input: synaptics - gate forcepad support by DMI check

2014-11-14T18:10:26+00:00

commit aa972409951e0675e07918620427517cad5090e0 upstream.

Unfortunately, ForcePad capability is not actually exported over PS/2, so
we have to resort to DMI checks.

Reported-by: Nicole Faerber 
Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

2014-09-26T18:04:31+00:00

Pull input fix from Dmitry Torokhov:
 "A small fixup to i8042 adding Asus X450LCP to the nomux list"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: i8042 - fix Asus X450LCP touchpad detection

Input: i8042 - fix Asus X450LCP touchpad detection

2014-09-24T23:26:56+00:00

We need to add this module to the nomux table to be able to detect the
touchpad.

Cc: stablevger.kernel.org
Signed-off-by: Marcos Paulo de Souza 
Signed-off-by: Dmitry Torokhov