This patch fixes a kernel panic which occurs when buf_list is empty. This can
happen occasionally when user space is under heavy load (e.g. due to image
processing on the CPU) and new buffers aren't re-queued fast enough. In that
case, vb2_start_streaming_called can return true, but when the spinlock
is taken and sur40_poll attempts to fetch the next buffer from buf_list, the
list is in fact empty.
This patch needs to be applied on top of the queued one adding V4L2 support
to the sur40 driver.
Signed-off-by: Florian Echtler <floe@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This patch adds raw video support for the Samsung SUR40 using vbuf2-dma-sg.
All tests from v4l2-compliance pass. Support for VB2_USERPTR is currently
disabled due to unexpected interference with dma-sg buffer sizes.
Signed-off-by: Florian Echtler <floe@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[hans.verkuil@cisco.com: fix compile warning: %ld -> %zd]
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The cos table used at fixp-arith.h has only 8 bits of precision.
That causes problems if it is reused on other drivers.
As some media drivers require a higher precision sin/cos
implementation, replace the current implementation by one that
will provide 32 bits precision.
The values generated by the new implementation matches the
32 bit precision of glibc's sin for an angle measured in
integer degrees.
It also provides support for fractional angles via linear
interpolation. On experimental calculus, when used a table
with a 0.001 degree angle, the maximum error for sin is
0.000038, which is likely good enough for practical purposes.
There are some logic there that seems to be specific to the
usage inside ff-memless.c. Move those logic to there, as they're
not needed elsewhere.
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Prashant Laddha <prladdha@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Pull more input updates from Dmitry Torokhov:
"The second round of updates for the input subsystem.
Updates to ALPS an bfin_roraty drivers and a couple oother fixups"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: psmouse - use IS_ENABLED instead of homegrown code
Input: bfin_rotary - introduce open and close methods
Input: bfin_rotary - convert to use managed resources
Input: bfin_rotary - use generic IO functions
Input: bfin_rotary - move pin lists into into platform data
Input: bfin_rotary - move platform header to linux/platform_data
Input: bfin_rotary - mark suspend and resume code as __maybe_unused
Input: bfin_rotary - fix potential oops in interrupt handler
Input: ALPS - move v7 packet info to Documentation and v6 packet info
Input: ALPS - fix confusing comment in protocol data
Input: ALPS - do not mix trackstick and external PS/2 mouse data
Input: ALPS - fix trackstick detection on some Dell Latitudes
Input: ALPS - consolidate setting protocol parameters
Input: ALPS - split protocol data from model info
Input: ALPS - make Rushmore a separate protocol
Input: ALPS - renumber protocol numbers
Input: adi - remove an unnecessary check
Input: pxa27x_keypad - remove an unneeded NULL check
Input: soc_button_array - use "Windows" key for "Home"
Instead of having various protocols provide <protocol>_supported()
functions, let's use IS_ENABLED() macro that works well in "if" statements.
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Introduce open and close methods for the input device to postpone enabling
the device until it is needed.
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Use of managed resources simplifies error handling.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Instead of using arch-specific accessors remap rotary register physical
address into kernel space in probe and use standard readw and writew to
access rotary MMRs.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Newer Blackfin boards use pinctrl API to manage pins and the legacy
peripherial lists are not useful on them. Let's move pin lists into
platform data so older boards can still use them and newer boards can use
the modern API.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The platform data definition of the rotary driver should be generic for all
architectures.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Instead of using #ifdef to guard potentially unused suspend and resume code
let's mark them as __maybe_unused so they still get discarded if they are
not used but we do not get warning. This allows for better compile coverage.
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The interrupt handler in the driver tries to fetch driver data from
platform device, unfortunately it is only set up after interrupt handler
is registered. Since interrupt handler does not really need to access
the platform device itself let's change it to get the driver data
instance instead.
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch move all packet info from driver source code to documentation
and adds info about v6 packet format (from driver source code).
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The comment about suspicions entry 0x20, 0x02, 0x0e has over time drifted
away and it become hard to figure out what it meant. Let's move it back so
it is clear.
Reported-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Previously dev2 device was used for both external PS/2 mouse and internal
trackstick device (if available). This change introduces dev3 device which
is used for external PS/2 mouse data and dev2 is now used only for
trackstick.
In case that trackstick is not present dev2 is not created, so userspace
does not see non existent device in system.
Because laptops with ALPS devices often do not use i8042 active
multiplexing all data (from touchpad, trackstick and external PS/2 mouse)
come to one port. So it is not possible to know if external PS/2 mouse is
connected or not. In most cases external PS/2 mouse is not connected so
driver will create dev3 input device after first bare PS/2 packet will be
received. So there will not be "ghost" input device.
This change also helps in identifying possible problems in future if driver
decides to report 6-bytes trackstick packets as 3-bytes bare PS/2 (data
will be reported to dev3 instead dev2).
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
On some Dell Latitudes we fail to identify presence of trackstick unless we
reset the device. The issue is quite benign as we do perform reset in
alps_init(), so the trackstick ends up working, but mouse name reported to
userspace is not accurate.
In order to fix the issue while avoiding the additional lengthy reset we
move the resrt to alps_detect() and keep the discovered state to be used
later in alps_init().
Reported-by: Pali Rohár <pali.rohar@gmail.com>
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Move setting of all protocol properties into alps_set_protocol (former
alps_set_defaults) instead of having it split between several functions.
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
In preparation of reworking the way we set protocol parameters let's
split certain protocol items from alps_model_info into a separate
structure.
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Even though Rushmore is very close to V3 protocol it is sufficiently
different to warrant it's own protocol name.
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
In order to accommodate new protocol number for Rushmore touchpads
let's shift protocol numbers by 8 bits (i.e. 1 -> 0x100) - this way
we keep protocol version reported in input device id the same as it
was, but add some holes in numbering.
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
printk and friends can now format bitmaps using '%*pb[l]'. cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.
* Line termination only requires one extra space at the end of the
buffer. Use PAGE_SIZE - 1 instead of PAGE_SIZE - 2 when formatting.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The input_free_device() function tests whether its argument is NULL and
then returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Static checkers complain about this NULL check because we dereference it
without checking a couple lines later. This function is only called
when "keypad->pdata" is non-NULL so we can just delete the NULL test.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[Dmitry: remove the variable altogether given that it is used just once and
dereference directly.]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
KEY_HOME is the key to go back to the beginning of the line, not the key to
get into an overview mode, as Windows does. GNOME can already make use of
the Windows key on multiple form factors, and other desktop environments
can use it depending on the form factor.
Using "Windows" as the emitted key also means that the keycode sent out
matches the symbol on the key itself.
So switch KEY_HOME to KEY_LEFTMETA ("Windows" key).
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
There's no %px extension. From the context I think the intention was to
dump the five bytes which were not as expected, and for that one should use
%ph.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
There is no point in queueing EV_SYN/SYN_DROPPED on clock type change when
there are no events in the client's queue and doing so confuses tests in
libinput package, so let's not do that.
Reported-and-tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The patch "module: fix types of device tables aliases" newly requires
that invocations of
MODULE_DEVICE_TABLE(type, name);
come *after* the definition of `name'. That is reasonable, but gscps2
wasn't doing this. Fix it.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
When tapping a clickpad with two fingers, there is a chance that the sensor
sees first only one finger, and at the next scan only the second one. In
this case, the sensors says that there has been only one finger on the
clickpad, which moved really fast between two scans.
We can try to counter this by adding a limit to what an actual finger can
move between 2 scans. A distance of 1cm between two scans for one finger
seems reasonable. However, this is not really accurate because the
resolution in X and in Y differs. But heh, that's how the in-kernel
tracking works right now, and its job is quite good, even with this
approximation.
This parameter solves most of the jumps observed, not all of them however.
But this is a hardware defect, and we might not be able to get something
better without much heavier computations.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=76722
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Remove some left-over ARM only includes in order to enable building on
ARM64. __raw_{read,write}l were getting implicitly included, so add
linux/io.h include.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Previously, delta filtering was applied TSC co-ordinate readouts before
reporting a single value to user space. This patch replaces delta filtering
with median filtering. Median filtering sorts co-ordinate readouts, drops
min and max values, and reports the average of remaining values. This
method is more sensible than delta filtering. Median filtering is applied
only if number of readouts is greater than 3 else just average of
co-ordinate readouts is reported.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch reads charge delay from tsc DT node and writes to
REG_CHARGEDELAY register. If the charge delay is not specified in DT then
default value of 0x400(CHARGEDLY_OPENDLY) is used.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
TSC interrupt handler had udelay to avoid reporting of false pen-up
interrupt to user space. This patch implements workaround suggesting in
Advisory 1.0.31 of silicon errata for am335x, thus eliminating udelay and
touchscreen lag. This also improves performance of touchscreen and
eliminates sudden jump of cursor at touch release.
IDLECONFIG and CHARGECONFIG registers are to be configured with same values
in order to eliminate false pen-up events. This workaround may result in
false pen-down to be detected, hence considerable charge step delay needs
to be added. The charge delay is set to 0xB000 (in terms of ADC clock
cycles) by default.
TSC steps are disabled at the end of every sampling cycle and EOS bit is
set. Once the EOS bit is set, the TSC steps need to be re-enabled to begin
next sampling cycle.
Signed-off-by: Brad Griffis <bgriffis@ti.com>
[vigneshr@ti.com: Ported the patch from v3.12 to v3.19rc1]
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch makes the initial changes required to workaround TSC-false
pen-up interrupts. It is required to implement these changes in order to
remove udelay in the TSC interrupt handler and false pen-up events. The
charge step is to be executed immediately after sampling X+. Hence TSC is
made to use higher numbered steps (steps 5 to 16 for 5 co-ordinate
readouts, 4 wire TSC configuration) and ADC to use lower ones. Further X
co-ordinate readouts must be the last to be sampled, thus co-ordinates are
sampled in the order Y-Z-X.
Signed-off-by: Brad Griffis <bgriffis@ti.com>
[vigneshr@ti.com: Ported the patch from v3.12 to v3.19rc1]
Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pull input layer updates from Dmitry Torokhov:
"Just a few quirks for PS/2 this time"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: elantech - add more Fujtisu notebooks to force crc_enabled
Input: i8042 - add noloop quirk for Medion Akoya E7225 (MD98857)
Input: synaptics - adjust min/max for Lenovo ThinkPad X1 Carbon 2nd
Add two more Fujitsu LIFEBOOK models that also ship with the Elantech
touchpad and don't work with crc_disabled to the quirk list.
Signed-off-by: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Some devices are not fast enough to differentiate between a fast-moving
contact and a new contact. This problem cannot be fully resolved because
information is truly missing, but it is possible to safe-guard against
obvious mistakes by restricting movement with a maximum displacement.
The new problem formulation for dmax > 0 cannot benefit from the speedup
for positive definite matrices, but since the convergence is faster, the
result is about the same. For a handful of contacts, the latency difference
is truly negligible.
Suggested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This is a I2C driver, so it's wrong to use platform prefix for the
modalias. We have all needed i2c aliases coming form MODULE_DEVICE_TABLE,
so let's remove the wrong and unneeded drv2667-haptics modalias.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This is a I2C driver, so it's wrong to use platform prefix for the
modalias. We have all needed i2c aliases coming form MODULE_DEVICE_TABLE,
so let's remove the wrong and unneeded drv260x-haptics modalias.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This is a I2C driver, so it's wrong to use platform prefix for the
modalias. We have all needed i2c aliases coming form MODULE_DEVICE_TABLE,
so let's remove the wrong and unneeded cap11xx modalias.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Daniel Mack <linux@zonque.org>
Reviewed-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The Allwinner A31 SoC (sun6i) has the same resistive touchpanel controller
as on other sunxi platforms. The only difference between the variants is
the control bits for enabling operations are left-shifted by 1 on the A31.
Also update the comment for the original temperature sensor with
information from Allwinner.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This driver implements support for PS2 controller found on Allwinner A10,
A20 SOCs. It has been tested on A20 Olimex-Lime2 board and also on A10.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To allow for different firmware sizes let's replace the original size check
with with checking the signature in the firmware data.
Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The fixes to the X.org driver have been applied long time ago and
the patch on kernel.org has long since gone so let's remove the
comment.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Without this the aux port does not get detected, and consequently the touchpad
will not work.
With this patch the touchpad is detected:
$ dmesg | grep -E "(SYN|i8042|serio)"
pnp 00:03: Plug and Play ACPI device, IDs SYN1d22 PNP0f13 (active)
i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input4
psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd00123/0x840300/0x126800, board id: 2863, fw id: 1473085
input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input6
dmidecode excerpt for this laptop is:
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: Medion
Product Name: Akoya E7225
Version: 1.0
Cc: stable@vger.kernel.org
Signed-off-by: Jochen Hein <jochen@jochen.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
If "(count == NAME_MAX)" then we could end up putting the NUL terminator
one space beyond the end of the fw_name[] array.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Fixes the warning regarding variable being dereferenced before check
'gen5_pip->resp_len'.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
gen5_bl_metadata_row_params structure has its fields specified with
explicit endianness, so we should not be trying to convert to native CPU
endianness when filling the structure.
Also fix firmware validation checks and misspelled field in
gen5_bl_metadata_row_params.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reviewed-by: Dudley Du <dudl@cypress.com>
Tested-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
