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nova_0flash_mmi: log touch down event timestamp

Browse source 
Driver will log the last touch down event timestamp and expose it via
sysfs. This feature utilized by sensors to mitigate false detection of
back tap gestures.

Change-Id: I53db8f1311275ef54c795de7f4f3ed350ed37842
Signed-off-by: Konstantin Makariev <hcv867@motorola.com>
Reviewed-on: https://gerrit.mot.com/2190470
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Wei Deng <dengwei1@motorola.com>
Reviewed-by: Eric Hefner <ehefner@motorola.com>
Reviewed-by: Qing Chang <qing@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Konstantin Makariev 2022-02-14 15:18:57 -06:00 • committed by Konstantin Makariev
commit bb324fae89
3 changed files with 39 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

22
drivers/input/touchscreen/nova_0flash_mmi/nt36xxx.c
View file

@ -1670,6 +1670,7 @@ static irqreturn_t nvt_ts_work_func(int irq, void *data)
uint8_t input_id = 0;
#if MT_PROTOCOL_B
uint8_t press_id[TOUCH_MAX_FINGER_NUM] = {0};
static uint8_t touchdown[TOUCH_MAX_FINGER_NUM];
#endif /* MT_PROTOCOL_B */
int32_t i = 0;
int32_t finger_cnt = 0;
@ -1826,14 +1827,21 @@ static irqreturn_t nvt_ts_work_func(int irq, void *data)
if (input_p == 0)
input_p = 1;
#if MT_PROTOCOL_B
press_id[input_id - 1] = 1;
input_mt_slot(ts->input_dev, input_id - 1);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
/* log touch down event once */
if (touchdown[input_id - 1] == 0) {
#if MT_PROTOCOL_B
ts->last_event_time = ktime_get();
pr_debug("TOUCH: [%d] logged timestamp\n", input_id - 1);
touchdown[input_id - 1] = 1;
pr_debug("TOUCH: [%d] pressed (event %d)\n", input_id - 1, point_data[position] & 0x07);
input_mt_slot(ts->input_dev, input_id - 1);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
#else /* MT_PROTOCOL_B */
input_report_abs(ts->input_dev, ABS_MT_TRACKING_ID, input_id - 1);
input_report_key(ts->input_dev, BTN_TOUCH, 1);
input_report_abs(ts->input_dev, ABS_MT_TRACKING_ID, input_id - 1);
input_report_key(ts->input_dev, BTN_TOUCH, 1);
#endif /* MT_PROTOCOL_B */
}
#ifdef PALM_GESTURE
if((point_data[position] & 0x07) == PALM_TOUCH) { //palm
@ -1868,7 +1876,7 @@ static irqreturn_t nvt_ts_work_func(int irq, void *data)
#if MT_PROTOCOL_B
for (i = 0; i < ts->max_touch_num; i++) {
if (press_id[i] != 1) {
if (!press_id[i] && touchdown[i]) {
input_mt_slot(ts->input_dev, i);
#ifdef PALM_GESTURE_RANGE
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MINOR, 0);
@ -1877,6 +1885,8 @@ static irqreturn_t nvt_ts_work_func(int irq, void *data)
input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
input_report_abs(ts->input_dev, ABS_MT_PRESSURE, 0);
input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, false);
touchdown[i] = 0;
pr_debug("TOUCH: [%d] release\n", i);
}
}

2
drivers/input/touchscreen/nova_0flash_mmi/nt36xxx.h
View file

@ -24,6 +24,7 @@
#include <linux/spi/spi.h>
#include <linux/uaccess.h>
#include <linux/version.h>
#include <linux/ktime.h>
#include <linux/mmi_kernel_common.h>
#ifdef NVT_SENSOR_EN
@ -279,6 +280,7 @@ struct nvt_ts_data {
uint8_t edge_cmd[3]; /* /< edge switching command */
uint8_t rotate_cmd; /* /< rotate switching command */
bool edge_ctrl; /* /< edge rate switching */
ktime_t last_event_time;
};
#if NVT_TOUCH_PROC

21
drivers/input/touchscreen/nova_0flash_mmi/nt36xxx_mmi_class.c
View file

@ -41,6 +41,8 @@ static ssize_t nvt_mmi_edge_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size);
static ssize_t nvt_mmi_edge_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t nvt_mmi_timestamp_show(struct device *dev,
struct device_attribute *attr, char *buf);
static DEVICE_ATTR(interpolation, (S_IRUGO | S_IWUSR | S_IWGRP),
nvt_mmi_interpolation_show, nvt_mmi_interpolation_store);
@ -50,6 +52,7 @@ static DEVICE_ATTR(jitter, (S_IRUGO | S_IWUSR | S_IWGRP),
nvt_mmi_jitter_show, nvt_mmi_jitter_store);
static DEVICE_ATTR(edge, (S_IRUGO | S_IWUSR | S_IWGRP),
nvt_mmi_edge_show, nvt_mmi_edge_store);
static DEVICE_ATTR(timestamp, S_IRUGO, nvt_mmi_timestamp_show, NULL);
#define MAX_ATTRS_ENTRIES 10
#define UI_FEATURE_ENABLE 1
@ -100,6 +103,8 @@ static int nvt_mmi_extend_attribute_group(struct device *dev, struct attribute_g
if (ts->edge_ctrl)
ADD_ATTR(edge);
ADD_ATTR(timestamp);
if (idx) {
ext_attributes[idx] = NULL;
*group = &ext_attr_group;
@ -189,6 +194,22 @@ static ssize_t nvt_mmi_interpolation_show(struct device *dev,
return scnprintf(buf, PAGE_SIZE, "0x%02x\n", ts->interpolation_cmd[0]);
}
static ssize_t nvt_mmi_timestamp_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ktime_t last_ktime;
struct timespec64 last_ts;
mutex_lock(&ts->lock);
last_ktime = ts->last_event_time;
ts->last_event_time = 0;
mutex_unlock(&ts->lock);
last_ts = ktime_to_timespec64(last_ktime);
return scnprintf(buf, PAGE_SIZE, "%lld.%ld\n", last_ts.tv_sec, last_ts.tv_nsec);
}
static ssize_t nvt_mmi_jitter_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{