[Q] How to change screen sensitivity?

---

Does anyone have any information about how to adjust screen sensitivity under Android, specifricaly Froyo on Nexus One?

I'm trying to research this topic but there seems to be very little information about this. I can't find any tool, script or custom rom that would allow screen sensitivity to be adjusted.

I found a thread talking about doing it for Liqid's touch using script but that's about it. I took a look on the script and I can't move forward with it as the path's script uses do not exists in my Nexus One. If anyone has any experience with this please share. The goal is to make the screen more sensitive then it is as a default.

Thanks.

Thread reference above:
android.modaco.com/content-page/309503/increase-touch-screen-sensitivity-only-tested-on-liquide-1-100-05-based-roms/page/40/

Script:
#!/system/bin/sh
sensitivity=25
noise=25
echo "set sensitivity to $sensitivity"
echo $sensitivity > /sys/devices/platform/i2c-adapter/i2c-0/0-005c/sensitivity
echo "set noise to $noise"
echo $noise > /sys/devices/platform/i2c-adapter/i2c-0/0-005c/noise
echo "done"

Sorry for bringing back something from the dead, but I've been researching about this. Nexus One screen sensitivity is low, compared to other touch screens I've experimented with. I know Nexus One is using a Synaptics board. Digging in the source code of Android, I found that the settings on the device itself are located here:

/system/usr/idc/synaptics-rmi-touchscreen.idc

The contents of the file as per 2.3.7 are these (they are the same since Gingerbread):

# Copyright (C) 2010 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#
# Input Device Calibration File for the Passion touch screen.
#
# These calibration values are derived from empirical measurements
# and may not be appropriate for use with other touch screens.
# Refer to the input device calibration documentation for more details.
#

# Touch Size
touch.touchSize.calibration = pressure

# Tool Size
# Driver reports tool size as a linear width measurement summed over
# all contact points.
#
# Raw width field measures approx. 1 unit per millimeter
# of tool size on the surface where a raw width of 1 corresponds
# to about 17mm of physical size. Given that the display resolution
# is 10px per mm we obtain a scale factor of 10 pixels / unit and
# a bias of 160 pixels. In addition, the raw width represents a
# sum of all contact area so we note this fact in the calibration.
touch.toolSize.calibration = linear
touch.toolSize.linearScale = 10
touch.toolSize.linearBias = 160
touch.toolSize.isSummed = 1

# Pressure
# Driver reports signal strength as pressure.
#
# A normal thumb touch while touching the back of the device
# typically registers about 100 signal strength units although
# this value is highly variable and is sensitive to contact area,
# manner of contact and environmental conditions. We set the
# scale so that a normal touch with good signal strength will be
# reported as having a pressure somewhere in the vicinity of 1.0,
# a featherlight touch will be below 1.0 and a heavy or large touch
# will be above 1.0. We don't expect these values to be accurate.
touch.pressure.calibration = amplitude
touch.pressure.source = default
touch.pressure.scale = 0.01

# Size
touch.size.calibration = normalized

# Orientation
touch.orientation.calibration = none

Also, in the kernel, the synaptics driver can be configured to be more sensitive. It is located here on the kernel source:
drivers/input/touchscreen/synaptics_i2c_rmi.c

/*
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include <linux/hrtimer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/synaptics_i2c_rmi.h>

static struct workqueue_struct *synaptics_wq;

struct synaptics_ts_data {
uint16_t addr;
struct i2c_client *client;
struct input_dev *input_dev;
int use_irq;
bool has_relative_report;
struct hrtimer timer;
struct work_struct work;
uint16_t max[2];
int snap_state[2][2];
int snap_down_on[2];
int snap_down_off[2];
int snap_up_on[2];
int snap_up_off[2];
int snap_down[2];
int snap_up[2];
uint32_t flags;
int reported_finger_count;
int8_t sensitivity_adjust;
int (*power)(int on);
struct early_suspend early_suspend;
};

#ifdef CONFIG_HAS_EARLYSUSPEND
static void synaptics_ts_early_suspend(struct early_suspend *h);
static void synaptics_ts_late_resume(struct early_suspend *h);
#endif

static int synaptics_init_panel(struct synaptics_ts_data *ts)
{
int ret;

ret = i2c_smbus_write_byte_data(ts->client, 0xff, 0x10); /* page select = 0x10 */
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
goto err_page_select_failed;
}
ret = i2c_smbus_write_byte_data(ts->client, 0x41, 0x04); /* Set "No Clip Z" */
if (ret < 0)
printk(KERN_ERR "i2c_smbus_write_byte_data failed for No Clip Z\n");

ret = i2c_smbus_write_byte_data(ts->client, 0x44,
ts->sensitivity_adjust);
if (ret < 0)
pr_err("synaptics_ts: failed to set Sensitivity Adjust\n");

err_page_select_failed:
ret = i2c_smbus_write_byte_data(ts->client, 0xff, 0x04); /* page select = 0x04 */
if (ret < 0)
printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
ret = i2c_smbus_write_byte_data(ts->client, 0xf0, 0x81); /* normal operation, 80 reports per second */
if (ret < 0)
printk(KERN_ERR "synaptics_ts_resume: i2c_smbus_write_byte_data failed\n");
return ret;
}

static void synaptics_ts_work_func(struct work_struct *work)
{
int i;
int ret;
int bad_data = 0;
struct i2c_msg msg[2];
uint8_t start_reg;
uint8_t buf[15];
struct synaptics_ts_data *ts = container_of(work, struct synaptics_ts_data, work);
int buf_len = ts->has_relative_report ? 15 : 13;

msg[0].addr = ts->client->addr;
msg[0].flags = 0;
msg[0].len = 1;
msg[0].buf = &start_reg;
start_reg = 0x00;
msg[1].addr = ts->client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = buf_len;
msg[1].buf = buf;

/* printk("synaptics_ts_work_func\n"); */
for (i = 0; i < ((ts->use_irq && !bad_data) ? 1 : 10); i++) {
ret = i2c_transfer(ts->client->adapter, msg, 2);
if (ret < 0) {
printk(KERN_ERR "synaptics_ts_work_func: i2c_transfer failed\n");
bad_data = 1;
} else {
/* printk("synaptics_ts_work_func: %x %x %x %x %x %x" */
/* " %x %x %x %x %x %x %x %x %x, ret %d\n", */
/* buf[0], buf[1], buf[2], buf[3], */
/* buf[4], buf[5], buf[6], buf[7], */
/* buf[8], buf[9], buf[10], buf[11], */
/* buf[12], buf[13], buf[14], ret); */
if ((buf[buf_len - 1] & 0xc0) != 0x40) {
printk(KERN_WARNING "synaptics_ts_work_func:"
" bad read %x %x %x %x %x %x %x %x %x"
" %x %x %x %x %x %x, ret %d\n",
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7],
buf[8], buf[9], buf[10], buf[11],
buf[12], buf[13], buf[14], ret);
if (bad_data)
synaptics_init_panel(ts);
bad_data = 1;
continue;
}
bad_data = 0;
if ((buf[buf_len - 1] & 1) == 0) {
/* printk("read %d coordinates\n", i); */
break;
} else {
int pos[2][2];
int f, a;
int base;
/* int x = buf[3] | (uint16_t)(buf[2] & 0x1f) << 8; */
/* int y = buf[5] | (uint16_t)(buf[4] & 0x1f) << 8; */
int z = buf[1];
int w = buf[0] >> 4;
int finger = buf[0] & 7;

/* int x2 = buf[3+6] | (uint16_t)(buf[2+6] & 0x1f) << 8; */
/* int y2 = buf[5+6] | (uint16_t)(buf[4+6] & 0x1f) << 8; */
/* int z2 = buf[1+6]; */
/* int w2 = buf[0+6] >> 4; */
/* int finger2 = buf[0+6] & 7; */

/* int dx = (int8_t)buf[12]; */
/* int dy = (int8_t)buf[13]; */
int finger2_pressed;

/* printk("x %4d, y %4d, z %3d, w %2d, F %d, 2nd: x %4d, y %4d, z %3d, w %2d, F %d, dx %4d, dy %4d\n", */
/* x, y, z, w, finger, */
/* x2, y2, z2, w2, finger2, */
/* dx, dy); */

base = 2;
for (f = 0; f < 2; f++) {
uint32_t flip_flag = SYNAPTICS_FLIP_X;
for (a = 0; a < 2; a++) {
int p = buf[base + 1];
p |= (uint16_t)(buf[base] & 0x1f) << 8;
if (ts->flags & flip_flag)
p = ts->max[a] - p;
if (ts->flags & SYNAPTICS_SNAP_TO_INACTIVE_EDGE) {
if (ts->snap_state[f][a]) {
if (p <= ts->snap_down_off[a])
p = ts->snap_down[a];
else if (p >= ts->snap_up_off[a])
p = ts->snap_up[a];
else
ts->snap_state[f][a] = 0;
} else {
if (p <= ts->snap_down_on[a]) {
p = ts->snap_down[a];
ts->snap_state[f][a] = 1;
} else if (p >= ts->snap_up_on[a]) {
p = ts->snap_up[a];
ts->snap_state[f][a] = 1;
}
}
}
pos[f][a] = p;
base += 2;
flip_flag <<= 1;
}
base += 2;
if (ts->flags & SYNAPTICS_SWAP_XY)
swap(pos[f][0], pos[f][1]);
}
if (z) {
input_report_abs(ts->input_dev, ABS_X, pos[0][0]);
input_report_abs(ts->input_dev, ABS_Y, pos[0][1]);
}
input_report_abs(ts->input_dev, ABS_PRESSURE, z);
input_report_abs(ts->input_dev, ABS_TOOL_WIDTH, w);
input_report_key(ts->input_dev, BTN_TOUCH, finger);
finger2_pressed = finger > 1 && finger != 7;
input_report_key(ts->input_dev, BTN_2, finger2_pressed);
if (finger2_pressed) {
input_report_abs(ts->input_dev, ABS_HAT0X, pos[1][0]);
input_report_abs(ts->input_dev, ABS_HAT0Y, pos[1][1]);
}

if (!finger)
z = 0;
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, z);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, w);
input_report_abs(ts->input_dev, ABS_MT_POSITION_X, pos[0][0]);
input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pos[0][1]);
input_mt_sync(ts->input_dev);
if (finger2_pressed) {
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, z);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, w);
input_report_abs(ts->input_dev, ABS_MT_POSITION_X, pos[1][0]);
input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, pos[1][1]);
input_mt_sync(ts->input_dev);
} else if (ts->reported_finger_count > 1) {
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0);
input_mt_sync(ts->input_dev);
}
ts->reported_finger_count = finger;
input_sync(ts->input_dev);
}
}
}
if (ts->use_irq)
enable_irq(ts->client->irq);
}

static enum hrtimer_restart synaptics_ts_timer_func(struct hrtimer *timer)
{
struct synaptics_ts_data *ts = container_of(timer, struct synaptics_ts_data, timer);
/* printk("synaptics_ts_timer_func\n"); */

queue_work(synaptics_wq, &ts->work);

hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL);
return HRTIMER_NORESTART;
}

static irqreturn_t synaptics_ts_irq_handler(int irq, void *dev_id)
{
struct synaptics_ts_data *ts = dev_id;

/* printk("synaptics_ts_irq_handler\n"); */
disable_irq_nosync(ts->client->irq);
queue_work(synaptics_wq, &ts->work);
return IRQ_HANDLED;
}

static int synaptics_ts_probe(
struct i2c_client *client, const struct i2c_device_id *id)
{
struct synaptics_ts_data *ts;
uint8_t buf0[4];
uint8_t buf1[8];
struct i2c_msg msg[2];
int ret = 0;
uint16_t max_x, max_y;
int fuzz_x, fuzz_y, fuzz_p, fuzz_w;
struct synaptics_i2c_rmi_platform_data *pdata;
unsigned long irqflags;
int inactive_area_left;
int inactive_area_right;
int inactive_area_top;
int inactive_area_bottom;
int snap_left_on;
int snap_left_off;
int snap_right_on;
int snap_right_off;
int snap_top_on;
int snap_top_off;
int snap_bottom_on;
int snap_bottom_off;
uint32_t panel_version;

if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
printk(KERN_ERR "synaptics_ts_probe: need I2C_FUNC_I2C\n");
ret = -ENODEV;
goto err_check_functionality_failed;
}

ts = kzalloc(sizeof(*ts), GFP_KERNEL);
if (ts == NULL) {
ret = -ENOMEM;
goto err_alloc_data_failed;
}
INIT_WORK(&ts->work, synaptics_ts_work_func);
ts->client = client;
i2c_set_clientdata(client, ts);
pdata = client->dev.platform_data;
if (pdata)
ts->power = pdata->power;
if (ts->power) {
ret = ts->power(1);
if (ret < 0) {
printk(KERN_ERR "synaptics_ts_probe power on failed\n");
goto err_power_failed;
}
}

ret = i2c_smbus_write_byte_data(ts->client, 0xf4, 0x01); /* device command = reset */
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_write_byte_data failed\n");
/* fail? */
}
{
int retry = 10;
while (retry-- > 0) {
ret = i2c_smbus_read_byte_data(ts->client, 0xe4);
if (ret >= 0)
break;
msleep(100);
}
}
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: Product Major Version %x\n", ret);
panel_version = ret << 8;
ret = i2c_smbus_read_byte_data(ts->client, 0xe5);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: Product Minor Version %x\n", ret);
panel_version |= ret;

ret = i2c_smbus_read_byte_data(ts->client, 0xe3);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: product property %x\n", ret);

if (pdata) {
while (pdata->version > panel_version)
pdata++;
ts->flags = pdata->flags;
ts->sensitivity_adjust = pdata->sensitivity_adjust;
irqflags = pdata->irqflags;
inactive_area_left = pdata->inactive_left;
inactive_area_right = pdata->inactive_right;
inactive_area_top = pdata->inactive_top;
inactive_area_bottom = pdata->inactive_bottom;
snap_left_on = pdata->snap_left_on;
snap_left_off = pdata->snap_left_off;
snap_right_on = pdata->snap_right_on;
snap_right_off = pdata->snap_right_off;
snap_top_on = pdata->snap_top_on;
snap_top_off = pdata->snap_top_off;
snap_bottom_on = pdata->snap_bottom_on;
snap_bottom_off = pdata->snap_bottom_off;
fuzz_x = pdata->fuzz_x;
fuzz_y = pdata->fuzz_y;
fuzz_p = pdata->fuzz_p;
fuzz_w = pdata->fuzz_w;
} else {
irqflags = 0;
inactive_area_left = 0;
inactive_area_right = 0;
inactive_area_top = 0;
inactive_area_bottom = 0;
snap_left_on = 0;
snap_left_off = 0;
snap_right_on = 0;
snap_right_off = 0;
snap_top_on = 0;
snap_top_off = 0;
snap_bottom_on = 0;
snap_bottom_off = 0;
fuzz_x = 0;
fuzz_y = 0;
fuzz_p = 0;
fuzz_w = 0;
}

ret = i2c_smbus_read_byte_data(ts->client, 0xf0);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: device control %x\n", ret);

ret = i2c_smbus_read_byte_data(ts->client, 0xf1);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_byte_data failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: interrupt enable %x\n", ret);

ret = i2c_smbus_write_byte_data(ts->client, 0xf1, 0); /* disable interrupt */
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_write_byte_data failed\n");
goto err_detect_failed;
}

msg[0].addr = ts->client->addr;
msg[0].flags = 0;
msg[0].len = 1;
msg[0].buf = buf0;
buf0[0] = 0xe0;
msg[1].addr = ts->client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = 8;
msg[1].buf = buf1;
ret = i2c_transfer(ts->client->adapter, msg, 2);
if (ret < 0) {
printk(KERN_ERR "i2c_transfer failed\n");
goto err_detect_failed;
}
printk(KERN_INFO "synaptics_ts_probe: 0xe0: %x %x %x %x %x %x %x %x\n",
buf1[0], buf1[1], buf1[2], buf1[3],
buf1[4], buf1[5], buf1[6], buf1[7]);

ret = i2c_smbus_write_byte_data(ts->client, 0xff, 0x10); /* page select = 0x10 */
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_write_byte_data failed for page select\n");
goto err_detect_failed;
}
ret = i2c_smbus_read_word_data(ts->client, 0x02);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
goto err_detect_failed;
}
ts->has_relative_report = !(ret & 0x100);
printk(KERN_INFO "synaptics_ts_probe: Sensor properties %x\n", ret);
ret = i2c_smbus_read_word_data(ts->client, 0x04);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
goto err_detect_failed;
}
ts->max[0] = max_x = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8);
ret = i2c_smbus_read_word_data(ts->client, 0x06);
if (ret < 0) {
printk(KERN_ERR "i2c_smbus_read_word_data failed\n");
goto err_detect_failed;
}
ts->max[1] = max_y = (ret >> 8 & 0xff) | ((ret & 0x1f) << 8);
if (ts->flags & SYNAPTICS_SWAP_XY)
swap(max_x, max_y);

ret = synaptics_init_panel(ts); /* will also switch back to page 0x04 */
if (ret < 0) {
printk(KERN_ERR "synaptics_init_panel failed\n");
goto err_detect_failed;
}

ts->input_dev = input_allocate_device();
if (ts->input_dev == NULL) {
ret = -ENOMEM;
printk(KERN_ERR "synaptics_ts_probe: Failed to allocate input device\n");
goto err_input_dev_alloc_failed;
}
ts->input_dev->name = "synaptics-rmi-touchscreen";
set_bit(EV_SYN, ts->input_dev->evbit);
set_bit(EV_KEY, ts->input_dev->evbit);
set_bit(BTN_TOUCH, ts->input_dev->keybit);
set_bit(BTN_2, ts->input_dev->keybit);
set_bit(EV_ABS, ts->input_dev->evbit);
inactive_area_left = inactive_area_left * max_x / 0x10000;
inactive_area_right = inactive_area_right * max_x / 0x10000;
inactive_area_top = inactive_area_top * max_y / 0x10000;
inactive_area_bottom = inactive_area_bottom * max_y / 0x10000;
snap_left_on = snap_left_on * max_x / 0x10000;
snap_left_off = snap_left_off * max_x / 0x10000;
snap_right_on = snap_right_on * max_x / 0x10000;
snap_right_off = snap_right_off * max_x / 0x10000;
snap_top_on = snap_top_on * max_y / 0x10000;
snap_top_off = snap_top_off * max_y / 0x10000;
snap_bottom_on = snap_bottom_on * max_y / 0x10000;
snap_bottom_off = snap_bottom_off * max_y / 0x10000;
fuzz_x = fuzz_x * max_x / 0x10000;
fuzz_y = fuzz_y * max_y / 0x10000;
ts->snap_down[!!(ts->flags & SYNAPTICS_SWAP_XY)] = -inactive_area_left;
ts->snap_up[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x + inactive_area_right;
ts->snap_down[!(ts->flags & SYNAPTICS_SWAP_XY)] = -inactive_area_top;
ts->snap_up[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y + inactive_area_bottom;
ts->snap_down_on[!!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_left_on;
ts->snap_down_off[!!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_left_off;
ts->snap_up_on[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x - snap_right_on;
ts->snap_up_off[!!(ts->flags & SYNAPTICS_SWAP_XY)] = max_x - snap_right_off;
ts->snap_down_on[!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_top_on;
ts->snap_down_off[!(ts->flags & SYNAPTICS_SWAP_XY)] = snap_top_off;
ts->snap_up_on[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y - snap_bottom_on;
ts->snap_up_off[!(ts->flags & SYNAPTICS_SWAP_XY)] = max_y - snap_bottom_off;
printk(KERN_INFO "synaptics_ts_probe: max_x %d, max_y %d\n", max_x, max_y);
printk(KERN_INFO "synaptics_ts_probe: inactive_x %d %d, inactive_y %d %d\n",
inactive_area_left, inactive_area_right,
inactive_area_top, inactive_area_bottom);
printk(KERN_INFO "synaptics_ts_probe: snap_x %d-%d %d-%d, snap_y %d-%d %d-%d\n",
snap_left_on, snap_left_off, snap_right_on, snap_right_off,
snap_top_on, snap_top_off, snap_bottom_on, snap_bottom_off);
input_set_abs_params(ts->input_dev, ABS_X, -inactive_area_left, max_x + inactive_area_right, fuzz_x, 0);
input_set_abs_params(ts->input_dev, ABS_Y, -inactive_area_top, max_y + inactive_area_bottom, fuzz_y, 0);
input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 255, fuzz_p, 0);
input_set_abs_params(ts->input_dev, ABS_TOOL_WIDTH, 0, 15, fuzz_w, 0);
input_set_abs_params(ts->input_dev, ABS_HAT0X, -inactive_area_left, max_x + inactive_area_right, fuzz_x, 0);
input_set_abs_params(ts->input_dev, ABS_HAT0Y, -inactive_area_top, max_y + inactive_area_bottom, fuzz_y, 0);
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, -inactive_area_left, max_x + inactive_area_right, fuzz_x, 0);
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, -inactive_area_top, max_y + inactive_area_bottom, fuzz_y, 0);
input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, fuzz_p, 0);
input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 15, fuzz_w, 0);
/* ts->input_dev->name = ts->keypad_info->name; */
ret = input_register_device(ts->input_dev);
if (ret) {
printk(KERN_ERR "synaptics_ts_probe: Unable to register %s input device\n", ts->input_dev->name);
goto err_input_register_device_failed;
}
if (client->irq) {
ret = request_irq(client->irq, synaptics_ts_irq_handler, irqflags, client->name, ts);
if (ret == 0) {
ret = i2c_smbus_write_byte_data(ts->client, 0xf1, 0x01); /* enable abs int */
if (ret)
free_irq(client->irq, ts);
}
if (ret == 0)
ts->use_irq = 1;
else
dev_err(&client->dev, "request_irq failed\n");
}
if (!ts->use_irq) {
hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ts->timer.function = synaptics_ts_timer_func;
hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
}
#ifdef CONFIG_HAS_EARLYSUSPEND
ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
ts->early_suspend.suspend = synaptics_ts_early_suspend;
ts->early_suspend.resume = synaptics_ts_late_resume;
register_early_suspend(&ts->early_suspend);
#endif

printk(KERN_INFO "synaptics_ts_probe: Start touchscreen %s in %s mode\n", ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");

return 0;

err_input_register_device_failed:
input_free_device(ts->input_dev);

err_input_dev_alloc_failed:
err_detect_failed:
err_power_failed:
kfree(ts);
err_alloc_data_failed:
err_check_functionality_failed:
return ret;
}

static int synaptics_ts_remove(struct i2c_client *client)
{
struct synaptics_ts_data *ts = i2c_get_clientdata(client);
unregister_early_suspend(&ts->early_suspend);
if (ts->use_irq)
free_irq(client->irq, ts);
else
hrtimer_cancel(&ts->timer);
input_unregister_device(ts->input_dev);
kfree(ts);
return 0;
}

static int synaptics_ts_suspend(struct i2c_client *client, pm_message_t mesg)
{
int ret;
struct synaptics_ts_data *ts = i2c_get_clientdata(client);

if (ts->use_irq)
disable_irq(client->irq);
else
hrtimer_cancel(&ts->timer);
ret = cancel_work_sync(&ts->work);
if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */
enable_irq(client->irq);
ret = i2c_smbus_write_byte_data(ts->client, 0xf1, 0); /* disable interrupt */
if (ret < 0)
printk(KERN_ERR "synaptics_ts_suspend: i2c_smbus_write_byte_data failed\n");

ret = i2c_smbus_write_byte_data(client, 0xf0, 0x86); /* deep sleep */
if (ret < 0)
printk(KERN_ERR "synaptics_ts_suspend: i2c_smbus_write_byte_data failed\n");
if (ts->power) {
ret = ts->power(0);
if (ret < 0)
printk(KERN_ERR "synaptics_ts_resume power off failed\n");
}
return 0;
}

static int synaptics_ts_resume(struct i2c_client *client)
{
int ret;
struct synaptics_ts_data *ts = i2c_get_clientdata(client);

if (ts->power) {
ret = ts->power(1);
if (ret < 0)
printk(KERN_ERR "synaptics_ts_resume power on failed\n");
}

synaptics_init_panel(ts);

if (ts->use_irq)
enable_irq(client->irq);

if (!ts->use_irq)
hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
else
i2c_smbus_write_byte_data(ts->client, 0xf1, 0x01); /* enable abs int */

return 0;
}

#ifdef CONFIG_HAS_EARLYSUSPEND
static void synaptics_ts_early_suspend(struct early_suspend *h)
{
struct synaptics_ts_data *ts;
ts = container_of(h, struct synaptics_ts_data, early_suspend);
synaptics_ts_suspend(ts->client, PMSG_SUSPEND);
}

static void synaptics_ts_late_resume(struct early_suspend *h)
{
struct synaptics_ts_data *ts;
ts = container_of(h, struct synaptics_ts_data, early_suspend);
synaptics_ts_resume(ts->client);
}
#endif

static const struct i2c_device_id synaptics_ts_id[] = {
{ SYNAPTICS_I2C_RMI_NAME, 0 },
{ }
};

static struct i2c_driver synaptics_ts_driver = {
.probe = synaptics_ts_probe,
.remove = synaptics_ts_remove,
#ifndef CONFIG_HAS_EARLYSUSPEND
.suspend = synaptics_ts_suspend,
.resume = synaptics_ts_resume,
#endif
.id_table = synaptics_ts_id,
.driver = {
.name = SYNAPTICS_I2C_RMI_NAME,
},
};

static int __devinit synaptics_ts_init(void)
{
synaptics_wq = create_singlethread_workqueue("synaptics_wq");
if (!synaptics_wq)
return -ENOMEM;
return i2c_add_driver(&synaptics_ts_driver);
}

static void __exit synaptics_ts_exit(void)
{
i2c_del_driver(&synaptics_ts_driver);
if (synaptics_wq)
destroy_workqueue(synaptics_wq);
}

module_init(synaptics_ts_init);
module_exit(synaptics_ts_exit);

MODULE_DESCRIPTION("Synaptics Touchscreen Driver");
MODULE_LICENSE("GPL");

Maybe we can tweak only the .icl file, or we'll have to dig deep into the kernel to improve the responsiveness of this touch screen!

Increased the sensitivity by changing the value:
touch.pressure.scale = 0.01 to touch.pressure.scale = 0.001
in /system/usr/idc/synaptics-rmi-touchscreen.idc

Please use the Q&A Forum for questions Thanks
Moving to Q&A

Originally Posted by dferreira

Increased the sensitivity by changing the value:
touch.pressure.scale = 0.01 to touch.pressure.scale = 0.001
in /system/usr/idc/synaptics-rmi-touchscreen.idc

I just tried this on my MyTouch 4G Slide (htc Doubleshot) running CyanogenMod 10 (20130101). It either works beautifully or it's my imagination. Thanks!!!!!