RK Android7.1 TP GT1X

RK3399 GT1X触摸屏驱动调试笔记 

GT1X 驱动，cfg 资源  https://download.csdn.net/download/qq_40949012/20432225?spm=1001.2014.3001.5501

一.DTS 

&i2c4 {
	     gt1x:goodix_ts@14{
	      status = "okay";
              compatible = "goodix,gt1x";
              reg = <0x14>;
              max-x = <1280>;
              max-y = <800>;            
              touch-gpio = <&gpio3 16 IRQ_TYPE_LEVEL_LOW>;
	      reset-gpio = <&gpio3 17 GPIO_ACTIVE_HIGH>;
       };
};

 二.修改驱动源码

2.1.kernel\drivers\input\touchscreen\gt1x\gt1x.c 

/**
 * gt1x_parse_dt - parse platform infomation form devices tree.
 */
static int gt1x_parse_dt(struct device *dev)
{
	struct device_node *np;
	int ret;

	if (!dev)
		return -ENODEV;

	np = dev->of_node;
	gt1x_int_gpio = of_get_named_gpio(np, "goodix,irq-gpio", 0);//"touch-gpio"
	gt1x_rst_gpio = of_get_named_gpio(np, "goodix,rst-gpio", 0);//"reset-gpio"

	if (!gpio_is_valid(gt1x_int_gpio) || !gpio_is_valid(gt1x_rst_gpio)) {
		GTP_ERROR("Invalid GPIO, irq-gpio:%d, rst-gpio:%d",
				gt1x_int_gpio, gt1x_rst_gpio);
		return -EINVAL;
	}

	vdd_ana = regulator_get(dev, "vdd_ana");
	if (IS_ERR(vdd_ana)) {
		GTP_ERROR("regulator get of vdd_ana failed");
		ret = PTR_ERR(vdd_ana);
		vdd_ana = NULL;
		return ret;
	}

	vcc_i2c = regulator_get(dev, "vcc_i2c");
	if (IS_ERR(vcc_i2c)) {
		GTP_ERROR("regulator get of vcc_i2c failed");
		ret = PTR_ERR(vcc_i2c);
		vcc_i2c = NULL;
		goto ERR_GET_VCC;
	}
	return 0;
ERR_GET_VCC:
	regulator_put(vdd_ana);
	vdd_ana = NULL;
	return ret;
	return 0;
}

2.2.修改CFG参数，更改为厂家提供的CFG参数，其余的GTP_CFG_GROUP1，GTP_CFG_GROUP2，GTP_CFG_GROUP3，GTP_CFG_GROUP4，GTP_CFG_GROUP5均清空　

2.4.kernel\drivers\input\touchscreen\gt1x\gt1x_generic.h

设置GTP_CUSTOM_CFG为1，加载自定义配置

#define GTP_CUSTOM_CFG        1	// customize resolution & interrupt trigger mode

修改自定义CFG

#if GTP_CUSTOM_CFG
#define GTP_MAX_HEIGHT   1280
#define GTP_MAX_WIDTH    800
#define GTP_INT_TRIGGER  1	/* 0:Rising 1:Falling */
#define GTP_WAKEUP_LEVEL 1
#else
#define GTP_MAX_HEIGHT   4096
#define GTP_MAX_WIDTH    4096
#define GTP_INT_TRIGGER  1
#define GTP_WAKEUP_LEVEL 1
#endif　　　

三.#define GTP_DEBUG_ON 1 // enable log printed by GTP_DEBUG(...)  方便调试输出信息。

dmesg | grep  GTP
[    0.648308] <<GTP-DBG>>[gt1x_ts_init:752]GTP driver installing...
[    0.879360] <<GTP-INF>>[gt1x_ts_probe:509] GTP Driver Version: V1.4<2015/07/10>//驱动加载成功
[    0.879435] <<GTP-INF>>[gt1x_ts_probe:510] GTP I2C Address: 0x14
[    0.879748] <<GTP-ERR>>[gt1x_parse_dt:317] vdd_ana not specified, fallback to power-supply
[    0.879883] <<GTP-ERR>>[gt1x_parse_dt:320] power not specified, ignore power ctrl
[    0.880121] <<GTP-INF>>[gt1x_reset_guitar:779] GTP RESET!
[    0.945381] <<GTP-DBG>>[gt1x_set_reset_status:672]Set reset status.
[    0.968541] <<GTP-INF>>[gt1x_get_chip_type:898] Chip Type: GT1X
[    0.977775] <<GTP-INF>>[gt1x_read_version:854] IC VERSION:GT1158_00012A(Patch)_0102(Mask)_00(SensorID)//触摸屏id
[    1.000212] <<GTP-INF>>[gt1x_init_panel:650] X_MAX=800,Y_MAX=1280,TRIGGER=0x01,WAKEUP_LEVEL=1
[    1.001155] <<GTP-DBG>>[gt1x_request_irq:408]INT trigger type:1
[    1.001280] <<GTP-DBG>>[gt1x_ts_probe:557]GTP works in interrupt mode.
[    1.002817] <<GTP-DBG>>[gt1x_touch_event_handler:1314]Additional Int Pulse.
[    1.007746] <<GTP-DBG>>[gt1x_touch_event_handler:1314]Additional Int Pulse.
[    1.021001] <<GTP-DBG>>[gt1x_touch_event_handler:1314]Additional Int Pulse.
[   15.741651] <<GTP-DBG>>[gt1x_touch_event_handler:1273](0)(391,1192)[100]
[   15.754392] <<GTP-DBG>>[gt1x_touch_event_handler:1273](0)(391,1192)[100]
[   15.767474] <<GTP-DBG>>[gt1x_touch_event_handler:1273](0)(391,1192)[100]
[   15.780796] <<GTP-DBG>>[gt1x_touch_event_handler:1273](0)(391,1192)[100]