526互联

调试GT911，1024x600 7寸 MIPI 电容触摸屏

发布时间 2023-07-05 18:04:53作者: 阿风小子

硬件：易百纳38x38mm RV1126板

SDK：2.2

一、驱动注册失败

上电信息中出现如下：

[    0.403505] i2c /dev entries driver
[    0.406719] goodix_ts_probe() start
[    0.406762] Goodix-TS 3-005d: no max-x defined
[    0.406797] Goodix-TS: probe of 3-005d failed with error -22

解决：在kernel/drivers/input/touchscreen/gt9xx/gt9xx.c驱动中搜索“no max-x defined”的关键句；发现设备树中没有配置tp-size属性，根据代码的理解是选择触摸屏芯片的型号（若代码中没有对应的芯片型号，可以自己添加）：

if (of_property_read_u32(np, "tp-size", &val)) {dev_err(&client->dev, "no max-x defined\n");return -EINVAL;}if (val == 89) {m89or101 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 101) {m89or101 = FALSE;gtp_change_x2y = TRUE;gtp_x_reverse = TRUE;gtp_y_reverse = FALSE;} else if (val == 911) {m89or101 = FALSE;bgt911 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 970) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = TRUE;gtp_change_x2y = FALSE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 910) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = FALSE;bgt910 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;}

在设备树文件/kernel/arch/arm/boot/dts/rv1109-38-v10-spi-nand.dts修改增加tp-size为如下：

&i2c3 {status = "okay";clock-frequency = <400000>;pinctrl-names = "default";pinctrl-0 = <&i2c3m1_xfer>; gt9xx: gt9xx@5d {compatible = "goodix,gt9xx";reg = <0x5d>;
//      	gtp_ics_slot_report;touch-gpio = <&gpio2 RK_PA6 IRQ_TYPE_EDGE_RISING>;reset-gpio = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;max-x = <1024>;max-y = <600>;tp-size = <911>;
//      	power-supply = <&vcc18_lcd_n>;};
};

解决了：

[    0.403886] i2c /dev entries driver
[    0.407113] goodix_ts_probe() start
[    0.407181] Goodix-TS 3-005d: 3-005d supply tp not found, using dummy regulator
[    0.407292] Goodix-TS 3-005d: Linked as a consumer to regulator.0
[    0.579130] input: goodix-ts as /devices/platform/ff520000.i2c/i2c-3/3-005d/input/input0

"tp-size” 这个参数表面看是 tp 的尺寸，实际在代码中通过这个参数来选择配置信息和触摸调整，在源码中根据 tp-size 设置 tp 方向是否需要镜像、切换，还有需要使用的配置参数。
如果 bgt927 设置为 TRUE，其他的 bgtxxx 都要设置 FALSE
开始调试时，下面三个参数都设置为 FALSE，然后根据 bgt927 选择配置参数，编译烧录后根据实际现象再调整下面三个参数
gtp_change-x2y：x、y交换方向
gtp_x_reverse：x 方向坐标镜像
gtp_y_reverse：y 方向左边镜像

if (val == 89) {m89or101 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 101) {m89or101 = FALSE;gtp_change_x2y = TRUE;gtp_x_reverse = TRUE;gtp_y_reverse = FALSE;} else if (val == 911) {m89or101 = FALSE;bgt911 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 970) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = TRUE;gtp_change_x2y = FALSE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 910) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = FALSE;bgt910 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;}

val是读取设备树里的tp-size来获取的:用于调节触摸xy轴

二、触摸屏可以触摸，但是x轴数据反了

gt9xx.c驱动里面有调整X轴和Y轴数据方向代码，只需要修改下驱动即可；

m89or101 = FALSE;
bgt9271 = TRUE;
gtp_change_x2y = FALSE;    ===>X轴和Y轴数据交换
gtp_x_reverse = TRUE;      ===>X轴数据反转
gtp_y_reverse = TRUE;      ===>XY轴数据反转

如果上面配置修改没有起作用，看下代码哪里做了判断，修改如下即可触摸正常：

//if (!bgt911 && !bgt970) {if (gtp_x_reverse)x = ts->abs_x_max - x;if (gtp_y_reverse)y = ts->abs_y_max - y;
//	}

三、可以触摸了，但是Y轴数据跳变，几乎只有一半的屏幕是可以正常滑动的

参考：RK3399触摸不准，修改drivers中gt9xx.h的cfg

文件目录kernel/drivers/input/touchscreen/gt9xx/gt9xx.h打开这个调试宏

#define DEBUG_SWITCH  1

Debug看日志

[    0.403131] <<-GTP-INFO->> GTP driver installing...
[    0.403670] i2c /dev entries driver
[    0.406933] goodix_ts_probe() start
[    0.406968] <<-GTP-INFO->> GTP Driver Version: V2.2<2014/01/14>
[    0.406983] <<-GTP-INFO->> GTP I2C Address: 0x5d
[    0.407028] Goodix-TS 3-005d: 3-005d supply tp not found, using dummy regulator
[    0.407138] Goodix-TS 3-005d: Linked as a consumer to regulator.0
[    0.432077] <<-GTP-INFO->> Guitar reset
[    0.556023] <<-GTP-INFO->> Chip Type: GOODIX_GT9
[    0.556497] <<-GTP-INFO->> IC Version: 911_1060
[    0.556524] <<-GTP-INFO->>   <gtp_init_panel>_1429
[    0.556524]
[    0.556551] <<-GTP-DEBUG->> [1459]Config Groups' Lengths: 186, 0, 0, 0, 0, 0
[    0.556888] <<-GTP-INFO->> CTP_CONFIG_GROUP1 used, config length: 186
[    0.557242] <<-GTP-DEBUG->> [1534]CFG_GROUP1 Config Version: 67, 0x43; IC Config Version: 65, 0x41
[    0.557269] <<-GTP-INFO->>   <gtp_init_panel>_1538
[    0.557269]
[    0.557297] <<-GTP-INFO->>   <gtp_init_panel>_1603    <4096, 4096>
[    0.557297]
[    0.557315] <<-GTP-INFO->>   <gtp_init_panel>_1605
[    0.557315]
[    0.557332] <<-GTP-INFO->>   <gtp_init_panel>_1644
[    0.557332]
[    0.557353] <<-GTP-INFO->> Driver send config.
[    0.563126] <<-GTP-INFO->> X_MAX: 4096, Y_MAX: 4096, TRIGGER: 0x01
[    0.578615] <<-GTP-INFO->> create proc entry gt9xx_config success
[    0.578938] input: goodix-ts as /devices/platform/ff520000.i2c/i2c-3/3-005d/input/input0
[    0.579234] <<-GTP-DEBUG->> [1870]INT trigger type:1
[    0.579560] <<-GTP-INFO->>   <gtp_request_irq>_1884     ts->irq=81   ret = 0
[    0.579560]
[    0.579596] <<-GTP-INFO->>   <gtp_request_irq>_1914     ts->irq=81   ret = 0
[    0.579596]
[    0.579618] <<-GTP-INFO->> GTP works in interrupt mode.

这句话：

[    0.563126] <<-GTP-INFO->> X_MAX: 4096, Y_MAX: 4096, TRIGGER: 0x01

那问题就很明显了，应该是cfg不对，X轴和Y轴的最大尺寸是错的！

根据文件kernel/drivers/input/touchscreen/gt9xx/gt9xx_cfg.h

#ifndef _GOODIX_GT9XX_CFG_H_
#define _GOODIX_GT9XX_CFG_H_/* CFG for GT911 */
u8 gtp_dat_gt11[] = {/* <1200, 1920>*/#include "WGJ89006B_GT911_Config_20140625_085816_0X43.cfg"
};u8 gtp_dat_8_9[] = {/* TODO:Puts your update firmware data here! *//* <1920, 1200> 8.9 *//* #include "WGJ89006B_GT9271_Config_20140625_085816_0X41.cfg" *//* #include "WGJ10162_GT9271_Config_20140820_182456.cfg" */#include "WGJ10162B_GT9271_1060_Config_20140821_1341110X42.cfg"
};u8 gtp_dat_8_9_1[] = {#include "GT9271_Config_20170526.cfg"
};u8 gtp_dat_9_7[] = {/* <1536, 2048> 9.7 */#include "GT9110P_Config_20160217_1526_2048_97.cfg"
};u8 gtp_dat_10_1[] = {/* TODO:Puts your update firmware data here! *//* <1200, 1920> 10.1 */#include "WGJ10187_GT9271_Config_20140623_104014_0X41.cfg"
};u8 gtp_dat_7[] = {/* TODO:Puts your update firmware data here! *//* <1024, 600> 7.0 */#include "WGJ10187_GT910_Config_20140623_104014_0X41.cfg"
};#endif /* _GOODIX_GT9XX_CFG_H_ */

对应的配置文件gtp_dat_gt11居然用的分辨率是<1200, 1920>，所以确定是：kernel/drivers/input/touchscreen/gt9xx/gt9xx_cfg.h文件里面的配置出错了！

需要找供应商要触摸屏的cfg文件，不然无解！

三、汇顶触摸屏配置文件解析

参考：汇顶GT9xxx触摸配置

使用汇顶Gt9xxx触摸屏，需要修改 drivers/input/touchscreen/gt9xxnewgt9xx.h 来更改分辨率

在这里插入图片描述测试校验和的工具：

#include <QCoreApplication>
#include <stdio.h>
#include <QDebug>uint8_t CTP_CFG_GROUP1[]= {\0x00,0x00,0x04,0x58,0x02,0x0A,0x0D,0x00,0x01,0x0A,0x1E,0x0F,0x58,0x41,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x8C,0x2E,0x0E,0x2F,0x31,0xEB,0x04,0x00,0x00,0x00,0x22,0x02,0x1D,0x00,0x01,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x1E,0x50,0x94,0xC5,0x02,0x07,0x00,0x00,0x04,0xC8,0x21,0x00,0xAA,0x28,0x00,0x90,0x31,0x00,0x7C,0x3B,0x00,0x6C,0x48,0x00,0x6C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x06,0x08,0x0A,0x0C,0x0E,0x10,0x12,0x14,0x16,0x18,0x1A,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x06,0x08,0x0A,0x0C,0x0F,0x10,0x12,0x13,0x14,0x16,0x18,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,0x24,0x26,0x28,0x29,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x01};uint8_t CTP_CFG_GROUP2[]= {\0x42,0x00,0x05,0x20,0x03,0x0A,0x3D,0x00,0x01,0x08,\0x28,0x0F,0x50,0x32,0x03,0x05,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x17,0x19,0x1D,0x14,0x8D,0x2D,0x88,\0x1E,0x20,0x31,0x0D,0x00,0x00,0x00,0x42,0x03,0x1D,\0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x14,0x2D,0x94,0xD5,0x02,0x07,0x00,0x00,0x04,\0xAF,0x15,0x00,0x95,0x19,0x00,0x80,0x1E,0x00,0x70,\0x23,0x00,0x63,0x29,0x00,0x63,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x01,0x04,0x05,0x06,0x07,0x08,0x09,\0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x14,0x15,0xFF,0xFF,\0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x02,0x04,0x06,0x07,0x08,0x0A,0x0C,\0x0F,0x10,0x11,0x12,0x13,0x19,0x1B,0x1C,0x1E,0x1F,\0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0xFF,0xFF,\0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,\0x00,0x00,0x00,0x00,0xEE,0x01};uint8_t SumCheck(uint8_t *data,int data_len)
{uint8_t sum_check = 0;for(int i = 0;(i<data_len)&&(i<1000);i++){sum_check += data[i];}sum_check = ~sum_check;sum_check += 1;return sum_check;
}int main(int argc, char *argv[])
{QCoreApplication a(argc, argv);uint8_t sum_check = 0;uint8_t *list[2] = {CTP_CFG_GROUP1,CTP_CFG_GROUP2};for(int i = 0;i<2;i++){sum_check = SumCheck(list[i],184);printf("-------------num:%d----------\n",i+1);printf("lcd_x_pix = %d\n",(list[i][1])|list[i][2]<<8);printf("lcd_y_pix = %d\n",(list[i][3])|list[i][4]<<8);printf("sum_check = 0x%2x\n",sum_check);printf("sum       = 0x%2x\n",list[i][184]);if(sum_check == list[i][184])printf("check ok\n");elseprintf("check error!!!\n");}return a.exec();
}

四、使用新的配置文件

4.1 新配置解决问题

千方百计搞到一个可以使用的配置文件。

GT911.cfg

0x41,0x00,0x04,0x58,0x02,0x0A,0x3C,0x00,0x02,0x54,0x28,0x0F,0x50,0x2D,0x03,0x05,0x00,0x00,0x00,0x00,0x40,0x00,0x04,0x18,0x1A,0x1E,0x14,0x87,0x28,0x0A,0x3C,0x44,0x15,0x0E,0x00,0x00,0x00,0xA9,0x03,0x1C,0x00,0x01,0x00,0x00,0x00,0x00,0xFF,0x5D,0x66,0x98,0x32,0x28,0x50,0x94,0xC5,0x02,0x07,0x00,0x00,0x01,0xA1,0x2A,0x00,0x91,0x31,0x00,0x85,0x38,0x00,0x7A,0x41,0x00,0x72,0x4A,0x00,0x72,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x06,0x08,0x0A,0x0C,0x0E,0x10,0x12,0x14,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0x06,0x08,0x0A,0x0C,0x1D,0x1E,0x1F,0x20,0x21,0x22,0x24,0x26,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x12,0x01

终于可以用了！

最后的配置（kernel/drivers/input/touchscreen/gt9xx/gt9xx_cfg.h）：

#ifndef _GOODIX_GT9XX_CFG_H_
#define _GOODIX_GT9XX_CFG_H_/* CFG for GT911 */
u8 gtp_dat_gt11[] = {/* <1200, 1920>*/// #include "WGJ89006B_GT911_Config_20140625_085816_0X43.cfg"/* <1024, 600> 7.0 */#include "GT911.cfg"
};
.....

gt9xx.c

...if (val == 89) {m89or101 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;} else if (val == 101) {m89or101 = FALSE;gtp_change_x2y = TRUE;gtp_x_reverse = TRUE;gtp_y_reverse = FALSE;} else if (val == 911) {m89or101 = FALSE;bgt911 = TRUE;gtp_change_x2y = FALSE;gtp_x_reverse = TRUE;gtp_y_reverse = TRUE;} else if (val == 970) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = TRUE;gtp_change_x2y = FALSE;gtp_x_reverse = FALSE;gtp_y_reverse = FALSE;} else if (val == 910) {m89or101 = FALSE;bgt911 = FALSE;bgt970 = FALSE;bgt910 = TRUE;gtp_change_x2y = TRUE;gtp_x_reverse = FALSE;gtp_y_reverse = TRUE;}ts->tp_regulator = devm_regulator_get(&client->dev, "tp");if (IS_ERR(ts->tp_regulator)) {dev_err(&client->dev, "failed to get regulator, %ld\n",PTR_ERR(ts->tp_regulator));return PTR_ERR(ts->tp_regulator);}ret = regulator_enable(ts->tp_regulator);if (ret < 0)GTP_ERROR("failed to enable tp regulator\n");msleep(20);ts->irq_pin = of_get_named_gpio_flags(np, "touch-gpio", 0, (enum of_gpio_flags *)(&ts->irq_flags));ts->rst_pin = of_get_named_gpio_flags(np, "reset-gpio", 0, &rst_flags);ts->pwr_pin = of_get_named_gpio_flags(np, "power-gpio", 0, &pwr_flags);//ts->tp_select_pin = of_get_named_gpio_flags(np, "tp-select-gpio", 0, &tp_select_flags);
/*    if (of_property_read_u32(np, "max-x", &val)) {dev_err(&client->dev, "no max-x defined\n");return -EINVAL;}//ts->abs_x_max = val;if (of_property_read_u32(np, "max-y", &val)) {dev_err(&client->dev, "no max-y defined\n");return -EINVAL;}*///ts->abs_y_max = val;if (of_property_read_u32(np, "configfile-num", &val)) {ts->cfg_file_num = 0;} else {ts->cfg_file_num = val;}ts->pendown =PEN_RELEASE;ts->client = client;
...

设备树（rv1109-38-v10-spi-nand.dts）相关的部分：

&dsi {status = "okay";rockchip,lane-rate = <480>;panel@0 {compatible = "simple-panel-dsi";reg = <0>;//backlight = <&backlight>;//power-supply = <&vcc18_lcd_n>;prepare-delay-ms = <5>;reset-delay-ms = <1>;init-delay-ms = <80>;disable-delay-ms = <10>;unprepare-delay-ms = <5>;width-mm = <165>;height-mm = <100>;dsi,flags = <(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET)>;dsi,format = <MIPI_DSI_FMT_RGB888>;dsi,lanes = <4>;panel-init-sequence = [05 64 01 1105 78 01 29];display-timings {native-mode = <&timing0>;timing0: timing0 {clock-frequency = <33359000>;hactive = <1024>;vactive = <600>;hfront-porch = <50>;hsync-len = <7>;hback-porch = <50>;vfront-porch = <18>;vsync-len = <5>;vback-porch = <17>;hsync-active = <0>;vsync-active = <0>;de-active = <0>;pixelclk-active = <0>;};};ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;panel_in_dsi: endpoint {remote-endpoint = <&dsi_out_panel>;};};};};ports {#address-cells = <1>;#size-cells = <0>;port@1 {reg = <1>;dsi_out_panel: endpoint {remote-endpoint = <&panel_in_dsi>;};};};
};&i2c3 {status = "okay";clock-frequency = <400000>;pinctrl-names = "default";pinctrl-0 = <&i2c3m1_xfer>; gt9xx: gt9xx@5d {compatible = "goodix,gt9xx";reg = <0x5d>;gtp_ics_slot_report;touch-gpio = <&gpio2 RK_PA6 IRQ_TYPE_EDGE_RISING>;reset-gpio = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;//max-x = <600>;//max-y = <1024>;tp-size = <911>;
//	      	power-supply = <&vcc18_lcd_n>;status ="okay";};
};

4.2 测试触摸的方法

在kernel增加frame buffer(/dev/fb0)设备节点

RV1126文件系统下面没有/dev/fb0设备节点：
进入kernel

cd kernel
make ARCH=arm rv1126_defconfig
make ARCH=arm menuconfig

进入配置：

修改位置一，如下：
在这里插入图片描述修改

位置二，如下：

在这里插入图片描述

之后重新编译生成固件烧写到开发板。

make ARCH=arm savedefconfig // 将.config 保存为 deconfig
cp defconfig arch/arm/configs/rv1126_defconfig
cd ..
./build.sh kernel

在buildroot中配置增加tslib

在这里插入图片描述

在上电后在/etc/profile文件中增加字段：
vi /etc/profile

export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/usr/lib/ts
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_CONSOLEDEVICE=none

4.3 测试

  • 校准：ts_calibrate
  • 打印原始值：ts_print_mt
    • 确定左上角是0,0，右下角是1024,600
    • 观察数据，手指从左上角连续滑动到右上角，是否数据是连续增加的？但凡有不连续，掉数据、跳数据的都是有问题的。

五、工作一段时间触摸屏驱动崩溃

在上面触摸屏数据没有问题后，驱动工作一段时间就崩溃，驱动崩溃的log信息如下：

[ 7205.681477] irq 80: nobody cared (try booting with the "irqpoll" option)
[ 7205.681531] CPU: 0 PID: 367 Comm: dbus-daemon Tainted: G           O      4.19.111 #2
[ 7205.681548] Hardware name: Generic DT based system
[ 7205.681592] [<b010f408>] (unwind_backtrace) from [<b010b96c>] (show_stack+0x10/0x14)
[ 7205.681623] [<b010b96c>] (show_stack) from [<b089b5a4>] (dump_stack+0x90/0xa4)
[ 7205.681654] [<b089b5a4>] (dump_stack) from [<b016f8a8>] (__report_bad_irq+0x28/0xcc)
[ 7205.681681] [<b016f8a8>] (__report_bad_irq) from [<b016fcb0>] (note_interrupt+0x28c/0x2dc)
[ 7205.681710] [<b016fcb0>] (note_interrupt) from [<b016cd8c>] (handle_irq_event_percpu+0x5c/0x7c)
[ 7205.681741] [<b016cd8c>] (handle_irq_event_percpu) from [<b016cde4>] (handle_irq_event+0x38/0x5c)
[ 7205.681771] [<b016cde4>] (handle_irq_event) from [<b0170b30>] (handle_edge_irq+0x134/0x1e4)
[ 7205.681798] [<b0170b30>] (handle_edge_irq) from [<b016bf68>] (generic_handle_irq+0x24/0x34)
[ 7205.681829] [<b016bf68>] (generic_handle_irq) from [<b03e5250>] (rockchip_irq_demux+0x10c/0x1bc)
[ 7205.681858] [<b03e5250>] (rockchip_irq_demux) from [<b016bf68>] (generic_handle_irq+0x24/0x34)
[ 7205.681887] [<b016bf68>] (generic_handle_irq) from [<b016c53c>] (__handle_domain_irq+0x5c/0xb4)
[ 7205.681919] [<b016c53c>] (__handle_domain_irq) from [<b03d6d8c>] (gic_handle_irq+0x3c/0x78)
[ 7205.681949] [<b03d6d8c>] (gic_handle_irq) from [<b0101a78>] (__irq_svc+0x58/0x8c)
[ 7205.681967] Exception stack(0xdcc23cd8 to 0xdcc23d20)
[ 7205.681985] 3cc0:                                                       9e9654d6 00000000
[ 7205.682009] 3ce0: 3e2b9000 b0c52d00 00000202 00000013 dcc22000 00000000 dcc23d28 dcc22000
[ 7205.682033] 3d00: dd364500 dcc23e2c 05355555 dcc23d28 0000000b b010215c 400f0153 ffffffff
[ 7205.682061] [<b0101a78>] (__irq_svc) from [<b010215c>] (__do_softirq+0xa4/0x274)
[ 7205.682092] [<b010215c>] (__do_softirq) from [<b012ac98>] (irq_exit+0xdc/0x10c)
[ 7205.682123] [<b012ac98>] (irq_exit) from [<b016c540>] (__handle_domain_irq+0x60/0xb4)
[ 7205.682153] [<b016c540>] (__handle_domain_irq) from [<b03d6d8c>] (gic_handle_irq+0x3c/0x78)
[ 7205.682181] [<b03d6d8c>] (gic_handle_irq) from [<b0101a78>] (__irq_svc+0x58/0x8c)
[ 7205.682198] Exception stack(0xdcc23da8 to 0xdcc23df0)
[ 7205.682219] 3da0:                   eef0c140 00000002 00000000 0000a863 eef0c140 dd30c8c0
[ 7205.682243] 3dc0: b0d0b980 00000000 b08b15c4 dd30c8c0 dd364500 dcc23e2c 00000000 dcc23df8
[ 7205.682262] 3de0: b01479b8 b08b6244 600f0053 ffffffff
[ 7205.682292] [<b0101a78>] (__irq_svc) from [<b08b6244>] (_raw_spin_unlock_irq+0x1c/0x4c)
[ 7205.682324] [<b08b6244>] (_raw_spin_unlock_irq) from [<b01479b8>] (finish_task_switch+0x70/0x204)
[ 7205.682352] [<b01479b8>] (finish_task_switch) from [<b08b15c4>] (__schedule+0x1fc/0x580)
[ 7205.682380] [<b08b15c4>] (__schedule) from [<b08b1998>] (schedule+0x50/0xb4)
[ 7205.682410] [<b08b1998>] (schedule) from [<b08b5758>] (schedule_hrtimeout_range_clock+0x150/0x15c)
[ 7205.682440] [<b08b5758>] (schedule_hrtimeout_range_clock) from [<b08b577c>] (schedule_hrtimeout_range+0x18/0x20)
[ 7205.682472] [<b08b577c>] (schedule_hrtimeout_range) from [<b025074c>] (do_epoll_wait+0x38c/0x510)
[ 7205.682502] [<b025074c>] (do_epoll_wait) from [<b0101000>] (ret_fast_syscall+0x0/0x4c)
[ 7205.682520] Exception stack(0xdcc23fa8 to 0xdcc23ff0)
[ 7205.682542] 3fa0:                   00000000 00000074 00000003 ae965608 00000040 ffffffff
[ 7205.682565] 3fc0: 00000000 00000074 0002e4ec 000000fc 00000001 ae965a48 00000002 00000053
[ 7205.682585] 3fe0: 000000fc ae9655e8 a6e4c9c5 a6dcd706
[ 7205.682599] handlers:
[ 7205.682624] [<96dc5706>] irq_default_primary_handler threaded [<ce5e0b64>] goodix_ts_irq_handler
[ 7205.682651] Disabling IRQ #80

解决方法：
在GT911.cfg配置文件中根据下面的内容
在这里插入图片描述将第7个字节中的触发方式改成上升沿触发，就好了。改完以后要将第184位的校验码减1。或者按照上面的校验工具计算一下。

六、在LVGL中的触摸修改:上下滑动方向相反

在开发板中运行例程lv_port_linux_frame_buffer，触摸左右滑动正常，但是上下滑动是反的。直接修改：
从触摸屏事件回调evdev_read进去：

    evdev_init();static lv_indev_drv_t indev_drv_1;lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/indev_drv_1.type = LV_INDEV_TYPE_POINTER;/*This function will be called periodically (by the library) to get the mouse position and state*/indev_drv_1.read_cb = evdev_read; // 这里修改lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);

修改：

void evdev_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
{struct input_event in;while(read(evdev_fd, &in, sizeof(struct input_event)) > 0) {if(in.type == EV_REL) {if(in.code == REL_X)#if EVDEV_SWAP_AXESevdev_root_y += in.value;#elseevdev_root_x += in.value;#endifelse if(in.code == REL_Y)#if EVDEV_SWAP_AXESevdev_root_x += in.value;#elseevdev_root_y += in.value;#endif} else if(in.type == EV_ABS) {if(in.code == ABS_X)#if EVDEV_SWAP_AXESevdev_root_y = in.value;#elseevdev_root_x = in.value;#endifelse if(in.code == ABS_Y)#if EVDEV_SWAP_AXESevdev_root_x = in.value;#elseevdev_root_y = in.value;#endifelse if(in.code == ABS_MT_POSITION_X)#if EVDEV_SWAP_AXESevdev_root_y = in.value;#elseevdev_root_x = in.value;#endifelse if(in.code == ABS_MT_POSITION_Y)#if EVDEV_SWAP_AXESevdev_root_x = 600-in.value; // 在这里修改#elseevdev_root_y = in.value;#endifelse if(in.code == ABS_MT_TRACKING_ID) {if(in.value == -1)evdev_button = LV_INDEV_STATE_REL;else if(in.value == 0)evdev_button = LV_INDEV_STATE_PR;}} ...
}

触摸屏事件是ABS_MT_POSITION_X和ABS_MT_POSITION_Y这里，由于上下滑动是相反的，所以直接在ABS_MT_POSITION_Y上下方向的最大值600减去得到的值就可以了。
将

else if(in.code == ABS_MT_POSITION_Y)
#if EVDEV_SWAP_AXESevdev_root_x = in.value; // 在这里修改
#elseevdev_root_y = in.value;
#endif

改成：

else if(in.code == ABS_MT_POSITION_Y)
#if EVDEV_SWAP_AXESevdev_root_x = 600-in.value; // 在这里修改
#elseevdev_root_y = in.value;
#endif

滑动就都正常了。

复盘了一下，这个问题画了一个礼拜才解决！花的时间35H+。不过收获真的太多了！第一次深入研究这个驱动这么久！