高通平台触摸屏调试
高通平台+Android9.0 TP
TP芯片厂商主要有：Goodix（汇顶）、FocalTech（敦泰）、synaptics（新思）、cypress（赛普拉斯）
1.向触摸屏厂商要驱动包
驱动添加的路径：
/m620/kernel/msm-4.9/drivers/input/touchscreen/gt9xx$
-rw-rw-r-- 14674 Mar 17 10:25 goodix_tool.c
-rw-rw-r-- 67411 Mar 17 10:25 gt9xx.c
-rw-rw-r-- 6455 Mar 17 10:25 gt9xx.h
-rw-rw-r-- 38548 Mar 17 10:25 gt9xx_update.c
-rw-rw-r-- 1270 Mar 17 10:25 Kconfig
-rw-rw-r-- 217 Mar 17 10:25 Makefile
2.添加编译驱动（有些系统需要去掉其他tp驱动）
2.1 /m620/kernel/msm-4.9/arch/arm64/configs$vi msm8953_defconfig
#raynor
CONFIG_TOUCHSCREEN_GT9XX=y
CONFIG_GT9XX_TOUCHPANEL_DRIVER=y
#CONFIG_GT9XX_TOUCHPANEL_UPDATE=y
#CONFIG_GT9XX_TOUCHPANEL_DEBUG=y
#CONFIG_GT9XX_SEC_TOUCHPANEL_UPDATE=y
#CONFIG_GT9XX_SEC_TOUCHPANEL_DEBUG=y
CONFIG_TOUCHSCREEN_GT1X=y
CONFIG_TOUCHSCREEN_FTS=y
2.2 /m620/kernel/msm-4.9/drivers/input/touchscreen$ vi Kconfig
source "drivers/input/touchscreen/gt9xx/Kconfig"
source "drivers/input/touchscreen/gt9xx_second/Kconfig"
source "drivers/input/touchscreen/focaltech_touch/Kconfig"
2.3/m620/kernel/msm-4.9/drivers/input/touchscreen$ vi Makefile
obj-$(CONFIG_TOUCHSCREEN_GT9XX) += gt9xx/
obj-$(CONFIG_TOUCHSCREEN_GT9XX_SEC) += gt9xx_second/
obj-$(CONFIG_TOUCHSCREEN_GT1X) += gt1x/
obj-$(CONFIG_TOUCHSCREEN_GT1X_SEC) += gt1x_second/
obj-$(CONFIG_TOUCHSCREEN_FTS) += focaltech_touch/
obj-$(CONFIG_TOUCHSCREEN_FTS_SEC) += focaltech_touch_second/
3.添加设备树文件配置
3.1 /m620/kernel/msm-4.9/arch/arm64/boot/dts/qcom$ vi msm8953-mtp.dtsi
//rid-> add i2c3 for tp0
&i2c_3 { /* BLSP1 QUP3 */
status = "ok";
goodix@5d {
compatible = "goodix,gt9xx";
reg = <0x5d>;
interrupt-parent = <&tlmm>;
interrupts = <65 0x2>;
reset-gpios = <&tlmm 64 0x0>;
interrupt-gpios = <&tlmm 65 0x2008>;
power-gpios = <&tlmm 0 0x0>;
vdd-supply = <&pm8953_l10>;
vcc_i2c-supply = <&pm8953_l6>;
goodix,panel-coords = <0 0 719 1405>;
goodix,display-coords = <0 0 719 1279>;
goodix,button-map= <139 172 158>;
goodix,enable-power-off;
goodix,product-id = "9147";
goodix,fw_name = "gtp_fw.bin";
pinctrl-names = "pmx_ts_active","pmx_ts_suspend";
pinctrl-0 = <&ts_int_active &ts_reset_active>;
pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;
goodix,cfg-data0 = [
44 DA 02 05 05 05 35 C1 01 09
28 08 48 35 03 05 00 00 FF 7F
10 50 85 14 17 1A 14 92 00 0A
31 2F D3 07 03 00 00 A2 33 1D
00 01 00 00 00 1E 00 09 10 00
2A 1E 50 94 C5 02 00 0E 00 04
B1 21 00 96 28 00 7F 31 00 6F
3B 00 60 48 00 60 10 30 48 00
F0 4A 3A FF EF 27 00 00 00 00
00 01 1C 19 17 0F 01 00 01 0F
0F 03 04 10 42 8F 0F 19 00 00
46 37 08 0A 0C 0E 10 12 14 16
18 1A 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 08 20 0A 1F 0C 1E 0E 1D
22 05 24 04 28 00 29 02 2A 06
00 00 00 00 00 00 00 00 00 00
00 FF FF FF FF FF FF FF FF AF
FF FF FF FF 87 01
];
goodix,have-touch-key;
goodix,driver-send-cfg;
};
3.2 /m620/kernel/msm-4.9/arch/arm64/boot/dts/qcom$ vi msm8953-pinctrl.dtsi
/* add pingrp for touchscreen */
ts_int_default: ts_int_default {
mux {
pins = "gpio65";
function = "gpio";
};
config {
pins = "gpio65";
drive-strength = <16>;
/*bias-pull-up;*/
input-enable;
bias-disable;
};
};
ts_int_output_high: ts_int_output_high {
mux {
pins = "gpio65";
function = "gpio";
};
config {
pins = "gpio65";
output-high;
};
};
ts_int_output_low: ts_int_output_low {
mux {
pins = "gpio65";
function = "gpio";
};
config {
pins = "gpio65";
output-low;
};
};
ts_int_input: ts_int_input {
mux {
pins = "gpio65";
function = "gpio";
};
config {
pins = "gpio65";
input-enable;
bias-disable;
};
4.驱动代码分析
/m620/kernel/msm-4.9/drivers/input/touchscreen/gt9xx$ vi gt9xx.c
msm8953-pinctrl.dtsi中定义的INT和RST管脚的处理
static int goodix_ts_pinctrl_init(struct goodix_ts_data *goodix_data)
{
int retval;
goodix_data->ts_pinctrl = devm_pinctrl_get(&(goodix_data->client->dev));
if(IS_ERR_OR_NULL(goodix_data->ts_pinctrl))
{
retval = PTR_ERR(goodix_data->ts_pinctrl);
dev_err(&goodix_data->client->dev,"Target does not use pinctrl %d\n",retval);
goto err_pinctrl_get;
}
goodix_data->pinctrl_state_active = pinctrl_lookup_state(goodix_data->ts_pinctrl,PINCTRL_STATE_ACTIVE);
if(IS_ERR_OR_NULL(goodix_data->pinctrl_state_active))
{
retval = PTR_ERR(goodix_data->pinctrl_state_active);
dev_err(&goodix_data->client->dev,"Can not lookup %s pinstate %d\n",PINCTRL_STATE_ACTIVE,retval);
goto err_pinctrl_lookup;
}
goodix_data->pinctrl_state_suspend = pinctrl_lookup_state(goodix_data->ts_pinctrl,PINCTRL_STATE_SUSPEND);
if(IS_ERR_OR_NULL(goodix_data->pinctrl_state_suspend))
{
retval = PTR_ERR(goodix_data->pinctrl_state_suspend);
dev_err(&goodix_data->client->dev,"Can not lookup %s pinstate %d\n",PINCTRL_STATE_SUSPEND,retval);
goto err_pinctrl_lookup;
}
goodix_data->pinctrl_state_release = pinctrl_lookup_state(goodix_data->ts_pinctrl,PINCTRL_STATE_RELEASE);
if(IS_ERR_OR_NULL(goodix_data->pinctrl_state_release))
{
retval = PTR_ERR(goodix_data->pinctrl_state_release);
dev_err(&goodix_data->client->dev,"Can not lookup %s pinstate %d\n",PINCTRL_STATE_RELEASE,retval);
}
return 0;
err_pinctrl_lookup:
devm_pinctrl_put(goodix_data->ts_pinctrl);
err_pinctrl_get:
goodix_data->ts_pinctrl = NULL;
return retval;
}
附加比较详细的分析，如有需要请点此处：
Qualcomm-android-msm8953-tp-20200421.