/************************************************************************ * I.MX6 Goodix GT9xx touchscreen driver porting * 聲明： * 本文主要是記錄GT9xx電容Touch移植過程中遇到的一些問題。 * * 2016-1-27 深圳 南山平山村 曾劍鋒 ***********************************************************************/ 一、參考文檔： GT9XX驅動移植說明書_for_Android_2014011401.pdf 二、error 1: 1. 出錯信息： 1. 直接將驅動放在kernel里系統會卡死，出錯信息如下： USB Gadget resume begins fsl_udc_resume, Wait for wakeup thread finishes dr_controller_run: udc out low power mode USB Gadget resume ends fsl-usb2-udc: bind to driver android_usb mousedev: PS/2 mouse device common for all mice input: gpio-keys as /devices/platform/gpio-keys/input/input0 <<-GTP-INFO->> GTP driver installing... <<-GTP-INFO->> GTP Driver Version: V2.4<2014/11/28> <<-GTP-INFO->> GTP Driver Built@11:15:29, Jan 26 2016 <<-GTP-INFO->> GTP I2C Address: 0x5d <<-GTP-INFO->> Guitar reset <<-GTP-INFO->> Chip Type: GOODIX_GT9 <<-GTP-INFO->> IC Version: 9157_1040 <<-GTP-INFO->> X_MAX: 720, Y_MAX: 1280, TRIGGER: 0x01 <<-GTP-INFO->> create proc entry gt9xx_config success input: goodix-ts as /devices/virtual/input/input1 <<-GTP-INFO->> GTP works in interrupt mode. <<-GTP-INFO->> Applied memory size:2562. <<-GTP-INFO->> Applied memory size:2562. <<-GTP-INFO->> I2C function: without pre and end cmd! <<-GTP-INFO->> Create proc entry success! mtk_tpd: hotknot_device register failed USB Gadget resume begins fsl_udc_resume, Wait for wakeup thread finishes ehci_fsl_bus_suspend begins, Host 1 ehci_fsl_bus_suspend ends, Host 1 <系統會卡死在這里，接下來沒有任何信息輸出> 2. 作為模塊加入內核，使用久了，系統也會卡死： root@android:/ # cd /data/local root@android:/data/local # ls gt9xxm.ko tmp root@android:/data/local # insmod gt9xxm.ko <<-GTP-INFO->> GTP driver installing... <<-GTP-INFO->> GTP Driver Version: V2.4<2014/11/28> <<-GTP-INFO->> GTP Driver Built@11:40:19, Jan 26 2016 <<-GTP-INFO->> GTP I2C Address: 0x5d <<-GTP-INFO->> Guitar reset <<-GTP-INFO->> Chip Type: GOODIX_GT9 <<-GTP-INFO->> IC Version: 9157_1040 <<-GTP-INFO->> X_MAX: 720, Y_MAX: 1280, TRIGGER: 0x01 <<-GTP-INFO->> create proc entry gt9xx_config success input: goodix-ts as /devices/virtual/input/input1 cpufreq_interactive_input_connect: connect to goodix-ts <<-GTP-INFO->> GTP works in interrupt mode. <<-GTP-INFO->> Applied memory size:2562. <<-GTP-INFO->> Applied memory size:2562. <<-GTP-INFO->> I2C function: without pre and end cmd! root@android:/data/local # <<-GTP-INFO->> Create proc entry success! mtk_tpd: hotknot_device register failed 2. 解決方法： 1. cat gt9xx.h ...... #define HOTKNOT_ENABLE 0 // hotknot module #define HOTKNOT_BLOCK_RW 0 // block rw operation in hotknot ...... 2. cat goodix_tool.c s32 init_wr_node(struct i2c_client *client) { ...... #if 0 if (misc_register(&hotknot_misc_device)) { printk("mtk_tpd: hotknot_device register failed\n"); return FAIL; } #endif ...... } 3. 思路來源： 1. 想通過盡可能減少驅動的功能來判斷驅動哪里出了問題。 2. cat gt9xx.h ...... #define HOTKNOT_ENABLE 1 // hotknot module #define HOTKNOT_BLOCK_RW 1 // block rw operation in hotknot ...... 3. 如上所述，不需要該功能，當然我也不知道這是什么功能。 4. 改為如下內容： #define HOTKNOT_ENABLE 0 // hotknot module #define HOTKNOT_BLOCK_RW 0 // block rw operation in hotknot 5. 報錯如下： ...... CC drivers/input/touchscreen/gt9xx.o drivers/input/touchscreen/gt9xx.c: In function 'goodix_ts_suspend': drivers/input/touchscreen/gt9xx.c:2735:5: warning: unused variable 'buf' [-Wunused-variable] CC drivers/input/touchscreen/gt9xx_update.o CC drivers/input/touchscreen/goodix_tool.o drivers/input/touchscreen/goodix_tool.c: In function 'init_wr_node': drivers/input/touchscreen/goodix_tool.c:346:21: error: 'hotknot_misc_device' undeclared (first use in this function) drivers/input/touchscreen/goodix_tool.c:346:21: note: each undeclared identifier is reported only once for each function it appears in drivers/input/touchscreen/goodix_tool.c: At top level: drivers/input/touchscreen/goodix_tool.c:855:16: warning: 'hotknot_write' defined but not used [-Wunused-function] drivers/input/touchscreen/goodix_tool.c:1243:16: warning: 'hotknot_read' defined but not used [-Wunused-function] make[3]: *** [drivers/input/touchscreen/goodix_tool.o] Error 1 make[2]: *** [drivers/input/touchscreen] Error 2 make[1]: *** [drivers/input] Error 2 make: *** [drivers] Error 2 error: make uImage failed. ./remake.sh: 18: exit: Illegal number: -1 6. 既然已經禁止了，那么不可能還有hotknot_misc_device設備注冊的，也就意味着這個版本的驅動有錯。 7. 綜上所述：可能是我們的kernel不支持hotknot這個功能導致的。 三、error 2: 1. 觸摸屏點擊有效，但是不准確，TP廠沒有給矯正文件，后來FAE確認是由於矯正配置參數的問題。 2. 修改gt9xx.h文件： ...... #define GTP_DRIVER_SEND_CFG 1 ...... 3. 配置參數： #define CTP_CFG_GROUP0 {\ 0x46,0xD0,0x02,0x00,0x05,0x0A,0x05,0x40,0x01,0x08,\ 0x28,0x0F,0x50,0x32,0x03,0x05,0x00,0x00,0x00,0x00,\ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x8A,0x0A,0x0B,\ 0x2E,0x30,0x31,0x0D,0x00,0x00,0x00,0x02,0x03,0x1D,\ 0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x32,0x00,0x00,\ 0x00,0x21,0x41,0x94,0xC5,0x02,0x07,0x00,0x00,0x04,\ 0x9E,0x23,0x00,0x8D,0x28,0x00,0x80,0x2E,0x00,0x74,\ 0x35,0x00,0x69,0x3C,0x00,0x69,0x00,0x00,0x00,0x00,\ 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,\ 0x00,0x00,0x16,0x14,0x12,0x10,0x0E,0x0C,0x0A,0x08,\ 0x06,0x04,0x02,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,\ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\ 0x00,0x00,0x16,0x13,0x18,0x12,0x1C,0x10,0x1D,0x0F,\ 0x0A,0x1E,0x00,0x24,0x22,0x02,0x21,0x04,0x20,0x06,\ 0x1F,0x08,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,\ 0x00,0xFB,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,\ 0x9F,0xFF,0xFF,0xFF,0x00,0x01\ }