1. USB tp触摸不准
项目中用到一款触摸屏显示是正常的就是TP不准，触摸的方向也是正确的就是触摸位置不准，屏幕中央触摸位置相对还好，越往边沿越不准，下面是当插上USB tp时抓到了logcat日志：
03-06 03:23:18.449 442 513 I InputReader: Device reconfigured: id=8, name='ILITEK ILITEK-TP', size 1280x2048, orientation 0, mode 1, display id 0
03-06 03:23:18.450 442 513 I InputReader: Device added: id=8, eventHubId=7, name='ILITEK ILITEK-TP', descriptor='f1b4838838e240568fcbdd50c0f63be308c623ef',sources=0x00001002
03-06 03:23:18.450 442 461 I Pointer : Device Added: Input Device 8: ILITEK ILITEK-TP
03-06 03:23:18.450 442 461 I Pointer : Descriptor: f1b4838838e240568fcbdd50c0f63be308c623ef
03-06 03:23:18.450 442 461 I Pointer : Generation: 31
03-06 03:23:18.450 442 461 I Pointer : Location: external
03-06 03:23:18.450 442 461 I Pointer : Keyboard Type: none
03-06 03:23:18.450 442 461 I Pointer : Has Vibrator: false
03-06 03:23:18.450 442 461 I Pointer : Has mic: false
03-06 03:23:18.450 442 461 I Pointer : Sources: 0x1002 ( touchscreen )
03-06 03:23:18.450 442 461 I Pointer : AXIS_X: source=0x1002 min=0.0 max=1279.0 flat=0.0 fuzz=0.0 resolution=4.1403723
03-06 03:23:18.450 442 461 I Pointer : AXIS_Y: source=0x1002 min=-624.0 max=1423.0 flat=0.0 fuzz=0.0 resolution=11.749283
03-06 03:23:18.450 442 461 I Pointer : AXIS_PRESSURE: source=0x1002 min=0.0 max=1.0 flat=0.0 fuzz=0.0 resolution=0.0
03-06 03:23:18.451 442 512 I configuration_changed: 8
从插入USB TP的日志上可以看到范围是1280x2048，但是实际上是1280x800
添加idc配置文件：
touch.deviceType = touchScreen
device.internal = 1
touch.orientationAware = 1
keyboard.layout = qwerty
keyboard.characterMap = qwerty
keyboard.orientationAware = 1
keyboard.builtIn = 1
cursor.mode = navigation
cursor.orientationAware = 1
命名Vendor_222a_Product_0001.idc，格式如下：
Vendor_(VID)_Product_(PID)
显示分辨率偏小，本身是1280x800，识别成了1280x720,所以去掉过滤分辨率文件resolution_white.xml恢复正常，也可以在resolution_white.xml中添加，如下
diff --git a/resolution_white.xml b/resolution_white.xml
index 846938a..a1a9f1c 100755
--- a/resolution_white.xml
+++ b/resolution_white.xml
@@ -416,4 +416,20 @@
<flags>5</flags>
<vic>102</vic>
</resolution>
+ <resolution> <!-- 1280x800P60 -->
+ <clock>74250</clock>
+ <hdisplay>1280</vdisplay>
+ <hsync_start>1300</vsync_start>
+ <hsync_end>1304</vsync_end>
+ <htotal>1314</vtotal>
+ <hskew>0</hskew>
+ <vdisplay>800</hdisplay>
+ <vsync_start>848</hsync_start>
+ <vsync_end>880</hsync_end>
+ <vtotal>960</htotal>
+ <vscan>0</vscan>
+ <vrefresh>60</vrefresh>
+ <flags>5</flags>
+ <vic>108</vic>
+ </resolution>
</resolutions>
2 触摸位置不准方向不对
commit b497de3bed4f12beaa51cb8c1a69214ca993d7e9
Author: k.li <k.li@vantron.com>
Date: Wed Mar 29 21:09:14 2023 +0800
exchange usb tp x_y position for 10inch(date:03.29)
Change-Id: Iaccabc31347dbaa3bad1da24eb5898bfd153f3ac
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c20945ed1dc1..c0672d5a7e56 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -52,6 +52,8 @@ MODULE_LICENSE("GPL");
#include "hid-ids.h"
+#define SWAP_X_Y_POS 1
+
/* quirks to control the device */
#define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0)
#define MT_QUIRK_SLOT_IS_CONTACTID BIT(1)
@@ -473,13 +475,17 @@ static void mt_feature_mapping(struct hid_device *hdev,
break;
}
}
-
+/* Swap x and y. <sq.li@vantron.com>20201116 */
+#if SWAP_X_Y_POS
+int logical_maximum;
+#endif
static void set_abs(struct input_dev *input, unsigned int code,
struct hid_field *field, int snratio)
{
int fmin = field->logical_minimum;
int fmax = field->logical_maximum;
int fuzz = snratio ? (fmax - fmin) / snratio : 0;
+ logical_maximum = fmax;
input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
}
@@ -956,7 +962,20 @@ static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
return 1;
}
+#if SWAP_X_Y_POS
+static void swap_x_y(struct mt_usages *slot)
+{
+ int swap = *slot->x;
+
+ //printk("vantron---- slot->x:%d slot->y:%d logical_maximum :%d \r\n",*slot->x,*slot->y,logical_maximum);
+ *slot->x = *slot->y;
+ *slot->y = logical_maximum - swap;
+ *slot->x = 9600 - *slot->x;
+ *slot->y = 9600 - *slot->y;
+ return;
+}
+#endif
static int mt_process_slot(struct mt_device *td, struct input_dev *input,
struct mt_application *app,
struct mt_usages *slot)
@@ -1067,7 +1086,9 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input,
major = major >> 1;
minor = minor >> 1;
}
-
+#if SWAP_X_Y_POS
+ swap_x_y(slot);
+#endif
input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
主要添加了swap_x_y函数，这里上报的位置并不是屏幕物理尺寸的实际位置，需要转换，同getevent -p命令可以看到触摸屏幕的注册信息，在set_abs函数中有相应的注册信息
