TP驱动调试分享——基于Qualcomm SDM710平台Android9.0,TP 采用I2C方式和CPU进行通信

目录

 

1 厂商驱动代码的添加

1.1 synaptics_dsx代码放到SDM710 kernel input相应目录

1.2 修改input/touchscreen目录下的Makefile和Kconfig文件

2 deconfig的配置

2.1 sdm670_defconfig

2.2 sdm670-perf_defconfig

3 目标平台的内核源码设备树dtsi配置

3.1  sdm670-qupv3.dtsi

3.2  sdm670-pinctrl.dtsi

4 firmware  TP性能的添加

5  屏翻转的分析

5.1 TP 屏反向:TP 屏倒置180度处理 根据synaptics_dsx_i2c.c描述的属性:

5.2 LCD屏反向LCD屏倒置 180

6  屏兼容问题

7  总结


1 厂商驱动代码的添加

1.1 synaptics_dsx代码放到SDM710 kernel input相应目录

1)synaptics_dsx 文件夹放目录kernel/msm-4.9/drivers/input/touchscreen/下。

synaptics_dsx 文件夹包含的文件有:

Kconfig

synaptics_dsx_active_pen.c 

synaptics_dsx_core.h  

synaptics_dsx_gesture.c 

synaptics_dsx_proximity.c 

synaptics_dsx_rmi_hid_i2c.c 

synaptics_dsx_test_reporting.c

Makefile 

synaptics_dsx_core.c 

synaptics_dsx_fw_update.c 

synaptics_dsx_i2c.c

synaptics_dsx_rmi_dev.c

synaptics_dsx_spi.c

synaptics_dsx_video.c

2) synaptics_dsx.h 文件放到kernel/msm-4.9/include/linux/input目录下

1.2 修改input/touchscreen目录下的Makefile和Kconfig文件

1) Kconfig文件中配置宏

config TOUCHSCREEN_SYNAPTICS_DSXbool "Synaptics DSX attributes"depends on I2ChelpSay Y here to enable support for Synaptics DSX attributes.This does not affect the core or other subsystem attributes.If unsure, say N.+source "drivers/input/touchscreen/synaptics_dsx/Kconfig“

2)Makefile文件中添加语句

+obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_DSX) += synaptics_dsx/

2 deconfig的配置

2.1 sdm670_defconfig

2.2 sdm670-perf_defconfig

msm_defconfig和msm-perf_defconfig,前者是编译debug调试版本,后者是user编译版本。修改部分一样添加如下

CONFIG_TOUCHSCREEN_SYNAPTICS_DSX=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_CORE=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_I2C=y#CONFIG_TOUCHSCREEN_SYNAPTICS_DSX_SPI=y#CONFIG_TOUCHSCREEN_SYNAPTICS_DSX_RMI_HID_I2C=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_RMI_DEV=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_FW_UPDATE=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_TEST_REPORTING=yCONFIG_TOUCHSCREEN_SYNAPTICS_DSX_GESTURE=y

3 目标平台的内核源码设备树dtsi配置

3.1  sdm670-qupv3.dtsi

3.2  sdm670-pinctrl.dtsi

使用设备树模型有关硬件描述,所以我们要修改目标平台的dtsi文件: kernel/msm4.9/arch/arm64/boot/dts/qcom目录下的两个文件

1sdm670-qupv3.dtsi

根据高通文档 80-pd126-5_d_sdm670_sdm710_qcs605_linux_peripherals_%28uart%2C_spi%2C_i2c%29_overview.pdf

和硬件原理图可以知道TP挂载的i2c模块是QUP_9 对应dts 文件就是qupv3_se9_i2c: i2c@a84000 {

  4bI2C偏移地址查考供应商提供的datasheet)、 "synaptics,dsx-i2c"(设备of_device_id要跟Synaptic_dsx_i2c.c文件中函数synaptics_rmi4_of_match_table[]中定义的一致)、  INTresetavddvdd等引脚需查看硬件原理图和高通平台的spreaddatasheet.

TP_IOVDD  悬空 ——》通过芯片内部有LCD供电

TP_INT——>TS_INT_N——》GPIO_125

TP_SRT——>TS_RESET_N——》GPIO _99

TP_SDA——>QUP_I2C_SDA_9——》GPIO_6

TP_SCL——>QUP_I2C_SCL_9——》GPIO _7

TP的相关GPIO引脚 

 

有LCD_AVDD给TP供电: 

添加sdm670-qupv3.dtsi的i2c设备树属性代码: 

qupv3_se9_i2c: i2c@a84000 { synaptics@4b {compatible = "synaptics,dsx-i2c";reg = <0x4b>;interrupt-parent = <&tlmm>;interrupts = <125 0x2008>;//vdd-supply = <&pm8994_l14>;//avdd-supply = <&pm8994_l22>;//pinctrl-names = "pmx_ts_active", "pmx_ts_suspend";//pinctrl-0 = <&ts_active>;//pinctrl-1 = <&ts_suspend>;synaptics,pwr-reg-name = "avdd";synaptics,bus-reg-name = "vdd";synaptics,display-coords = <0 0 1080 2160>;synaptics,panel-coords = <0 0 1080 2160 >; synaptics,reset-gpio = <&tlmm 99 0x00>;synaptics,irq-gpio = <&tlmm 125 0x2008>;synaptics,disable-gpios;synaptics,irq-on-state = <0>;synaptics,power-delay-ms = <200>;synaptics,reset-delay-ms = <200>;synaptics,reset-on-state = <0>;synaptics,reset-active-ms = <20>;//synaptics,x-flip = <1>;//synaptics,y-flip = <1>;synaptics,fw-name = "startup_fw_update.img";};

添加 sdm670-pinctrl.dtsi 代码:

+               touch_irq {                                     
+                       touch_irq_default: default {    
+                               mux {
+                                       pins = "gpio125";
+                                       function = "gpio";
+                               };
+                               config {
+                                       pins = "gpio125";
+                                       drive-strength = <6>; /* 16 mA */
+                                       bias-pull-down; /* pull down */
+                               };                      
+                       };                      
+                       touch_irq_active: active {      
+                               mux {
+                                       pins = "gpio125";
+                                       function = "gpio";
+                               };
+                               config {
+                                       pins = "gpio125";
+                                       bias-pull-up;                           
+                                       drive-strength = <6>;
+                               };      
+                       };              
+               };              
+               touch_reset {                                           
+                       touch_reset_default: default {
+                               mux {
+                                       pins = "gpio99";
+                                       function = "gpio";
+                               };
+                               config {
+                                       pins = "gpio99";
+                                       bias-disable;                           
+                                       output-low;                     
+                                       drive-strength = <6>;   
+                               };      
+                       };                      
+                       touch_reset_active: active {
+                               mux {
+                                       pins = "gpio99";
+                                       function = "gpio";
+                               };
+                               config {
+                                       pins = "gpio99";                        
+                                       bias-pull-up;                           
+                                       drive-strength = <6>;                   
+                               };
+                       }; 

4 firmware  TP性能的添加

1)将startup_fw_update.img放在device/gree/G0335D/目录下;

2)在G0335D/device/gree/G0335D/G0335D.mk中的# Sensor features

PRODUCT_COPY_FILES += \的地方添加语句:

device/gree/G0335D/startup_fw_update.img:system/etc/firmware/synaptics/startup_fw_update.img \

3)确保kernel/msm-3.18/drivers/input/touchscreen/synaptics_dsx/ synaptics_dsx_fw_update.c中 宏:DO_STARTUP_FW_UPDATE打开, 另外ENABLE_SYS_REFLASH定义为 true 如下:

#define DO_STARTUP_FW_UPDATE
#define ENABLE_SYS_REFLASH true 

4)确保以下为相对路径如下:

#define FW_IHEX_NAME "synaptics/startup_fw_update.bin"
#define FW_IMAGE_NAME "synaptics/startup_fw_update.img"

5)确保kernel/msm-3.18/drivers/input/touchscreen/synaptics_dsx/ synaptics_dsx_fw_update.cfw的宏名字一致:

#define FW_IMAGE_NAME "synaptics/ startup_fw_update.img"

6)在dtsi文件确保fw-name名字一致。kernel/msm-3.18/arch/arm64/boot/dts/gree/G0335D/ msm8996-mtp.dtsi

+ synaptics,fw-name = " startup_fw_update.img ";

7)固件升级成功后,将版本烧录到机器,可通过adb查看版本号:

Adb root
Adb shell
Cd  /sys/class/input/input3
Cat buildid

5  屏翻转的分析

5.1 TP 屏反向:TP 屏倒置180度处理 根据synaptics_dsx_i2c.c描述的属性:

prop = of_find_property(np, "synaptics,x-flip", NULL);
bdata->x_flip = prop > 0 ? true : false;
prop = of_find_property(np, "synaptics,y-flip", NULL);
bdata->y_flip = prop > 0 ? true : false;

可以在i2c dtsi文件sdm670-qupv3.dtsi添加 一下语句,从而使屏倒置:

 synaptics,x-flip = <1>; synaptics,y-flip = <1>;

5.2 LCD屏反向LCD屏倒置 180

device/qcom/msm8996/system.prop文件中添加:

ro.panel.mountflip=3

frameworks/native/services/surfaceflinger/DisplayDevice.cpp 描述属性:

    property_get("ro.panel.mountflip", property, "0");mPanelMountFlip = atoi(property);
/* 1: H-Flip, 2: V-Flip, 3: 180 (HV Flip)从Property里获得ro.panel.mountflip,ro.panel.mountflip这个赋值3就是180*/

6  屏兼容问题

https://blog.csdn.net/weixin_42352255/article/details/85453494

7  总结

1模块代码加载过程:

平台驱动加载:

module_init()——》synaptics_rmi4_init——》

synaptics_rmi4_bus_init()——》synaptics_rmi4_i2c_driver——》

synaptics_rmi4_i2c_probe——》注册i2c设备

synaptics_dsx_i2c_device

设备驱动加载:

synaptics_rmi4_driver——》synaptics_rmi4_probe——》input设备注

synaptics_rmi4_set_input_dev——》synaptics_rmi4_query_device——》

synaptics_rmi4_f12_init

中断上报:

synaptics_rmi4_probe——》synaptics_rmi4_irq_enable——》

synaptics_rmi4_irq——》synaptics_rmi4_sensor_report——》

synaptics_rmi4_report_touch——》synaptics_rmi4_f12_abs_report

 

2)调试工具adb以及常用命令

Adb shell getevent –l  //查看TP中断上报情况,显示input设备/type/code/value

Adb shell getevent –r //查看TP报点率

Adb shell getevent –I  //查看输入事件信息

查看input节点目录:

 

 

 

 

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