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77b071e793
linux/drivers/input/touchscreen
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Marek Vasut 77b071e793 Input: smtpe-ts - wait 50mS until polling for pen-up 
Wait a little bit longer, 50mS instead of 20mS, until the driver starts
polling for pen-up. The problematic behavior before this patch is applied
is as follows. The behavior was observed on the STMPE610QTR controller.

Upon a physical pen-down event, the touchscreen reports one set of x-y-p
coordinates and a pen-down event. After that, the pen-up polling is
triggered and since the controller is not ready yet, the polling mistakenly
detects a pen-up event while the physical state is still such that the pen
is down on the touch surface.

The pen-up handling flushes the controller FIFO, so after that, all the
samples in the controller are discarded. The controller becomes ready
shortly after this bogus pen-up handling and does generate again a pen-down
interrupt. This time, the controller contains x-y-p samples which all read
as zero. Since pressure value is zero, this set of samples is effectively
ignored by userland.

In the end, the driver just bounces between pen-down and bogus pen-up
handling, generating no useful results. Fix this by giving the controller a
bit more time before polling it for pen-up.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-05-21 17:06:13 -07:00
..
88pm860x-ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
ad7877.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
ad7879-i2c.c Input: remove use of __devexit 2012-11-24 00:05:38 -08:00
ad7879-spi.c Input: ad7879-spi - remove redundant spi_set_drvdata 2013-09-20 09:58:29 -07:00
ad7879.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-12-17 10:06:02 -08:00
ad7879.h
ads7846.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
ar1021_i2c.c Input: constify of_device_id arrays 2015-03-19 12:16:18 -07:00
atmel_mxt_ts.c Input: atmel_mxt_ts - add support for Google Pixel 2 2015-04-15 10:52:48 -07:00
atmel-wm97xx.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
auo-pixcir-ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
bcm_iproc_tsc.c Input: add Broadcom iProc touchscreen driver 2015-03-23 11:04:48 -07:00
bu21013_ts.c Input: bu21013_ts - add support for Device Tree booting 2012-11-27 23:05:19 -08:00
chipone_icn8318.c Input: add support for ChipOne icn8318 based touchscreens 2015-03-24 11:27:52 -07:00
cy8ctmg110_ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
cyttsp4_core.c input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM 2014-12-05 02:54:17 +01:00
cyttsp4_core.h Input: cyttsp4 - use 16bit address for I2C/SPI communication 2013-07-06 21:57:06 -07:00
cyttsp4_i2c.c Input: cyttsp4 - I2C driver for Cypress TMA4XX touchscreen devices 2013-06-30 21:24:24 -07:00
cyttsp4_spi.c Input: cyttsp4 - replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO 2013-11-11 00:01:45 -08:00
cyttsp_core.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
cyttsp_core.h Input: cyttsp4 - use 16bit address for I2C/SPI communication 2013-07-06 21:57:06 -07:00
cyttsp_i2c_common.c Input: cyttsp - include appropriate header file in cyttsp_i2c_common.c 2013-12-15 02:54:04 -08:00
cyttsp_i2c.c Input: cyttsp - I2C driver split into two modules 2013-06-30 21:24:16 -07:00
cyttsp_spi.c Input: cyttsp4 - use 16bit address for I2C/SPI communication 2013-07-06 21:57:06 -07:00
da9034-ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
da9052_tsi.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
dynapro.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
edt-ft5x06.c Input: edt-ft5x06 - remove EV_SYN event report 2015-03-24 12:01:11 -07:00
eeti_ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
egalax_ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
elants_i2c.c Input: elants_i2c - zero-extend hardware ID in firmware name 2015-04-20 10:28:21 -07:00
elo.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
fujitsu_ts.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
goodix.c Input: goodix - add device tree support 2015-03-06 17:18:17 -08:00
gunze.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
hampshire.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
hp680_ts_input.c Input: hp680_ts_input - ensure arguments to request_irq and free_irq are compatible 2012-03-12 22:17:56 -07:00
htcpen.c Input: htcpen - remove redundant dev_set_drvdata 2013-09-18 07:53:30 -07:00
ili210x.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
inexio.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
intel-mid-touch.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
ipaq-micro-ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
jornada720_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
Kconfig Input: add support for ChipOne icn8318 based touchscreens 2015-03-24 11:27:52 -07:00
lpc32xx_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
mainstone-wm97xx.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
Makefile Input: add support for ChipOne icn8318 based touchscreens 2015-03-24 11:27:52 -07:00
max11801_ts.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
mc13783_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
mcs5000_ts.c Input: mcs5000_ts - remove ifdef around power management methods 2014-07-30 22:52:56 -07:00
migor_ts.c Input: convert I2C drivers to use module_i2c_driver() 2012-03-16 23:06:19 -07:00
mk712.c
mms114.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
mtouch.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
of_touchscreen.c Input: of_touchscreen - register multitouch axes 2015-03-24 12:00:40 -07:00
pcap_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
penmount.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
pixcir_i2c_ts.c Input: MT - add support for balanced slot assignment 2015-02-01 11:50:35 -08:00
s3c2410_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
st1232.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
stmpe-ts.c Input: smtpe-ts - wait 50mS until polling for pen-up 2015-05-21 17:06:13 -07:00
sun4i-ts.c Input: sun4i-ts - allow controlling filter and sensitivity via DT 2015-03-23 09:11:11 -07:00
sur40.c Input: sur40 - suppress false uninitialized variable warning 2013-12-01 22:17:35 -08:00
sx8654.c Input: sx8654 - fix memory allocation check 2015-05-13 10:29:33 -07:00
ti_am335x_tsc.c Input: ti_am335x_tsc - replace delta filtering with median filtering 2015-02-03 11:50:39 -08:00
touchit213.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
touchright.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
touchwin.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
tps6507x-ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
tsc40.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
tsc2005.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
tsc2007.c Input: tsc2007 - Convert msecs to jiffies only once 2015-03-31 14:41:33 -07:00
ucb1400_ts.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-12-17 10:06:02 -08:00
usbtouchscreen.c Input: usbtouchscreen - add new model from IRTOUCHSYSTEMS 2015-03-24 09:29:34 -07:00
w90p910_ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
wacom_i2c.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
wacom_w8001.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00
wm97xx-core.c Input: wm97xx - adapt parameters to tosa touchscreen. 2014-10-24 17:27:31 -07:00
wm831x-ts.c input: touchscreen: drop owner assignment from platform_drivers 2014-10-20 16:20:41 +02:00
wm9705.c
wm9712.c Input: wm971x - fix typo in module parameter description 2014-09-09 16:52:09 -07:00
wm9713.c Input: wm971x - fix typo in module parameter description 2014-09-09 16:52:09 -07:00
zforce_ts.c Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resume 2014-11-02 00:10:07 -07:00
zylonite-wm97xx.c Input: delete non-required instances of include <linux/init.h> 2014-01-06 23:23:57 -08:00