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调试GT911，1024x600 7寸 MIPI 电容触摸屏
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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 = ;pinctrl-names = "default";pinctrl-0 = ; gt9xx: gt9xx@5d {compatible = "goodix,gt9xx";reg = ; // gtp_ics_slot_report;touch-gpio = ;reset-gpio = ;max-x = ;max-y = ;tp-size = ; // power-supply = ;}; };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 1Debug看日志 [ 0.403131] GTP driver installing... [ 0.403670] i2c /dev entries driver [ 0.406933] goodix_ts_probe() start [ 0.406968] GTP Driver Version: V2.2 [ 0.406983] 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] Guitar reset [ 0.556023] Chip Type: GOODIX_GT9 [ 0.556497] IC Version: 911_1060 [ 0.556524] _1429 [ 0.556524] [ 0.556551] [1459]Config Groups' Lengths: 186, 0, 0, 0, 0, 0 [ 0.556888] CTP_CONFIG_GROUP1 used, config length: 186 [ 0.557242] [1534]CFG_GROUP1 Config Version: 67, 0x43; IC Config Version: 65, 0x41 [ 0.557269] _1538 [ 0.557269] [ 0.557297] _1603 [ 0.557297] [ 0.557315] _1605 [ 0.557315] [ 0.557332] _1644 [ 0.557332] [ 0.557353] Driver send config. [ 0.563126] X_MAX: 4096, Y_MAX: 4096, TRIGGER: 0x01 [ 0.578615] create proc entry gt9xx_config success [ 0.578938] input: goodix-ts as /devices/platform/ff520000.i2c/i2c-3/3-005d/input/input0 [ 0.579234] [1870]INT trigger type:1 [ 0.579560] _1884 ts->irq=81 ret = 0 [ 0.579560] [ 0.579596] _1914 ts->irq=81 ret = 0 [ 0.579596] [ 0.579618] GTP works in interrupt mode.这句话： [ 0.563126] 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[] = {/* */#include "WGJ89006B_GT911_Config_20140625_085816_0X43.cfg" };u8 gtp_dat_8_9[] = {/* TODO:Puts your update firmware data here! *//* 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[] = {/* 9.7 */#include "GT9110P_Config_20160217_1526_2048_97.cfg" };u8 gtp_dat_10_1[] = {/* TODO:Puts your update firmware data here! *//* 10.1 */#include "WGJ10187_GT9271_Config_20140623_104014_0X41.cfg" };u8 gtp_dat_7[] = {/* TODO:Puts your update firmware data here! *//* 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，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
设备树（rv1109-38-v10-spi-nand.dts）相关的部分： &dsi {status = "okay";rockchip,lane-rate = ;panel@0 {compatible = "simple-panel-dsi";reg = ;//backlight = ;//power-supply = ;prepare-delay-ms = ;reset-delay-ms = ;init-delay-ms = ;disable-delay-ms = ;unprepare-delay-ms = ;width-mm = ;height-mm = ;dsi,flags = ;dsi,format = ;dsi,lanes = ;panel-init-sequence = [05 64 01 1105 78 01 29];display-timings {native-mode = ;timing0: timing0 {clock-frequency = ;hactive = ;vactive = ;hfront-porch = ;hsync-len = ;hback-porch = ;vfront-porch = ;vsync-len = ;vback-porch = ;hsync-active = ;vsync-active = ;de-active = ;pixelclk-active = ;};};ports {#address-cells = ;#size-cells = ;port@0 {reg = ;panel_in_dsi: endpoint {remote-endpoint = ;};};};};ports {#address-cells = ;#size-cells = ;port@1 {reg = ;dsi_out_panel: endpoint {remote-endpoint = ;};};}; };&i2c3 {status = "okay";clock-frequency = ;pinctrl-names = "default";pinctrl-0 = ; gt9xx: gt9xx@5d {compatible = "goodix,gt9xx";reg = ;gtp_ics_slot_report;touch-gpio = ;reset-gpio = ;//max-x = ;//max-y = ;tp-size = ; // power-supply = ;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： 位置二，如下：
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] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 7205.681623] [] (show_stack) from [] (dump_stack+0x90/0xa4) [ 7205.681654] [] (dump_stack) from [] (__report_bad_irq+0x28/0xcc) [ 7205.681681] [] (__report_bad_irq) from [] (note_interrupt+0x28c/0x2dc) [ 7205.681710] [] (note_interrupt) from [] (handle_irq_event_percpu+0x5c/0x7c) [ 7205.681741] [] (handle_irq_event_percpu) from [] (handle_irq_event+0x38/0x5c) [ 7205.681771] [] (handle_irq_event) from [] (handle_edge_irq+0x134/0x1e4) [ 7205.681798] [] (handle_edge_irq) from [] (generic_handle_irq+0x24/0x34) [ 7205.681829] [] (generic_handle_irq) from [] (rockchip_irq_demux+0x10c/0x1bc) [ 7205.681858] [] (rockchip_irq_demux) from [] (generic_handle_irq+0x24/0x34) [ 7205.681887] [] (generic_handle_irq) from [] (__handle_domain_irq+0x5c/0xb4) [ 7205.681919] [] (__handle_domain_irq) from [] (gic_handle_irq+0x3c/0x78) [ 7205.681949] [] (gic_handle_irq) from [] (__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] [] (__irq_svc) from [] (__do_softirq+0xa4/0x274) [ 7205.682092] [] (__do_softirq) from [] (irq_exit+0xdc/0x10c) [ 7205.682123] [] (irq_exit) from [] (__handle_domain_irq+0x60/0xb4) [ 7205.682153] [] (__handle_domain_irq) from [] (gic_handle_irq+0x3c/0x78) [ 7205.682181] [] (gic_handle_irq) from [] (__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] [] (__irq_svc) from [] (_raw_spin_unlock_irq+0x1c/0x4c) [ 7205.682324] [] (_raw_spin_unlock_irq) from [] (finish_task_switch+0x70/0x204) [ 7205.682352] [] (finish_task_switch) from [] (__schedule+0x1fc/0x580) [ 7205.682380] [] (__schedule) from [] (schedule+0x50/0xb4) [ 7205.682410] [] (schedule) from [] (schedule_hrtimeout_range_clock+0x150/0x15c) [ 7205.682440] [] (schedule_hrtimeout_range_clock) from [] (schedule_hrtimeout_range+0x18/0x20) [ 7205.682472] [] (schedule_hrtimeout_range) from [] (do_epoll_wait+0x38c/0x510) [ 7205.682502] [] (do_epoll_wait) from [] (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] [] irq_default_primary_handler threaded [] 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！ |
测试校验和的工具：
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。【本文地址】
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