linux下GT911触摸屏驱动优化记录

背景

由于最近要做linux内核启动速度优化，所以就对着驱动一点一点优化，加上QT应用程序的初始化，总共的启动时间要做到4S以内。目前先调试GT911驱动程序。

平台

• 芯片：全志A33
• 内核：linux-3.4
• 优化驱动：GT911

优化步骤

原始驱动加载信息

[   47.327870] ***CTP***GTP driver init
[   47.335887] =====ctp_fetch_sysconfig_para=====. 
[   47.353187] ctp_fetch_sysconfig_para: ctp_power_io script_get_item err. 
[   47.365240] ctp_irq gpio number is 37
[   47.371302] axp22_ldoio1: Failed to create debugfs directory
[   47.370921] CPU1: Booted secondary processor
[   47.383971] ***CTP***GTP driver gesture wakeup is used!
[   47.410038] ***CTP***info.ctp_used:1
[   47.414094] ***CTP***info.twi_id:0
[   47.418038] ***CTP***info.screen_max_x:1024
[   47.422781] ***CTP***info.screen_max_y:600
[   47.427413] ***CTP***info.revert_x_flag:0
[   47.432053] ***CTP***info.revert_y_flag:0
[   47.436591] ***CTP***info.exchange_x_y_flag:0
[   47.441606] ***CTP***info.irq_gpio_number:37
[   47.446430] ***CTP***info.wakeup_gpio_number:360
[   47.451661] ***CTP******CTP*** ctp_wakeup:status:0,ms = 0
[   47.520025] ***CTP******CTP*** ctp_wakeup:status:1,ms = 0
[   47.620873] the adapter number is 0
[   47.625075] ctp_detect: addr = 5d
[   47.629115] detect ret 2
[   47.632780] ======detect ok !=====
[   47.638369] ***CTP***GTP Driver Version: V2.2<2014/01/14>***CTP***GTP Driver Built@09:35:50, Dec 31 2019***CTP***GTP I2C Address: 0x5d<<-GTP-INFO->> IC Version: 911_1060
[   47.659088] ***CTP***Config Groups Lengths: 186, 186, 186, 186, 186, 186, 186
[   47.668453] ***CTP***CTP name : gt911_1024x600
[   47.675321] ***CTP***gt9xx:sensor_id = 6
[   47.679800] ***CTP***Sensor_ID: 6***CTP***CTP_CONFIG_GROUP7 used, config length: 186
[   47.689203] ***CTP***CFG_GROUP7 Config Version: 66, 0x42; IC Config Version: 65, 0x41
[   47.698040] <<-GTP-INFO->> Driver send config.
[   47.709369] <<-GTP-INFO->> X_MAX: 1024, Y_MAX: 600, TRIGGER: 0x00
[   47.730077] <<-GTP-INFO->> create proc entry gt9xx_config success
[   47.737015] <<-GTP-INFO->> Ready to run update thread.
[   47.743022] <<-GTP-INFO->> Update by default firmware array
[   47.751617] <<-GTP-INFO->> GTP works in interrupt mode.
[   47.757607] <<-GTP-INFO->> Applied memory size:2562.
[   47.763463] <<-GTP-INFO->> I2C function: without pre and end cmd!
[   47.770612] <<-GTP-INFO->> Create proc entry success!
[   47.776678] the adapter number is 1
[   47.782579] <<-GTP-INFO->> FILE HARDWARE INFO:00016000
[   47.780962] CPU2: Booted secondary processor
[   47.793334] <<-GTP-INFO->> FILE PID:9271
[   47.797777] <<-GTP-INFO->> FILE VID:1040
[   47.802322] <<-GTP-INFO->> IC HARDWARE INFO:00900600
[   47.807920] <<-GTP-INFO->> IC PID:911
[   47.812081] <<-GTP-INFO->> IC VID:1060
[   47.816416] <<-GTP-INFO->> Firmware length:90112(88K)
[   47.822130] <<-GTP-ERROR->> File PID != Ic PID, update aborted!
[   47.828871] <<-GTP-ERROR->> [update_proc]Check *.bin file fail.

由上图可以得知整个驱动的加载时间等于：47.8288-47.3278 = 500ms

对于一个tp驱动来说，一个初始化代码居然要500ms，不能忍。这个驱动是有很大的优化空间的，目标是第一阶段先优化到100ms以内。具体的操作步骤如下：

1、关闭自动更新（-200ms）

2、优化tp的上电复位时序（-100ms）

3、屏蔽多余的打印信息（-100ms）

更改记录

-------------------------- drivers/input/init-input.c --------------------------
index edfc4e1..0355baa 100755
@@ -37,7 +37,7 @@ static int ctp_fetch_sysconfig_para(enum input_sensor_type *ctp_type)
 	struct ctp_config_info *data = container_of(ctp_type,
 					struct ctp_config_info, input_type);
 
-	pr_info("=====%s=====. \n", __func__);
+//	pr_info("=====%s=====. \n", __func__);
 
 	type = script_get_item("ctp_para", "ctp_used", &val);
 	if (SCIRPT_ITEM_VALUE_TYPE_INT != type) {
@@ -79,7 +79,7 @@ static int ctp_fetch_sysconfig_para(enum input_sensor_type *ctp_type)
 		data->ctp_power_vol = val.val;
 	type = script_get_item("ctp_para", "ctp_power_io", &val);
 	if(SCIRPT_ITEM_VALUE_TYPE_PIO != type) {
-		pr_err("%s: ctp_power_io script_get_item err. \n",__func__ );
+//		pr_err("%s: ctp_power_io script_get_item err. \n",__func__ );
 	}
 	else
 		data->ctp_power_io = val.gpio;
@@ -136,7 +136,7 @@ static int ctp_fetch_sysconfig_para(enum input_sensor_type *ctp_type)
 	}
 	data->irq_gpio = val.gpio;
     data->int_number = val.gpio.gpio;
-    pr_err("ctp_irq gpio number is %d\n", data->int_number);
+//    pr_err("ctp_irq gpio number is %d\n", data->int_number);
         
 #ifdef TOUCH_KEY_LIGHT_SUPPORT 
 	type = script_get_item("ctp_para", "ctp_light", &val);

------------------ drivers/input/touchscreen/gt9xxnew/gt9xx.c ------------------
index 0a16c94..dbb317b 100755
@@ -170,8 +170,9 @@ enum{
 	DEBUG_WAKEUP_INFO = 1U << 5,
 	DEBUG_OTHERS_INFO = 1U << 6,
 };
-#define dprintk(level_mask,fmt,arg...)    if(unlikely(debug_mask & level_mask)) \
-        printk("***CTP***"fmt, ## arg)
+#define dprintk(level_mask,fmt,arg...)
+//#define dprintk(level_mask,fmt,arg...)    if(unlikely(debug_mask & level_mask)) \
+//        printk("***CTP***"fmt, ## arg)
 module_param_named(debug_mask,debug_mask,int,S_IRUGO | S_IWUSR | S_IWGRP);
 static const unsigned short normal_i2c[2] = {0x5d, I2C_CLIENT_END};
 struct ctp_config_info config_info = {
@@ -190,7 +191,6 @@ static int ctp_detect(struct i2c_client *client, struct i2c_board_info *info)
 {
 	struct i2c_adapter *adapter = client->adapter;
     int  ret = -1;
-	printk("the adapter number is %d\n", adapter->nr);
       
     if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)){
         	printk("======return=====\n");
@@ -198,7 +198,6 @@ static int ctp_detect(struct i2c_client *client, struct i2c_board_info *info)
     }
         
     if(twi_id == adapter->nr){
-            printk("%s: addr = %x\n", __func__, client->addr);
             ret = gtp_i2c_test(client);
 			printk("detect ret %d\n",ret);
             if(!ret){
@@ -206,7 +205,6 @@ static int ctp_detect(struct i2c_client *client, struct i2c_board_info *info)
         		return -ENODEV;
         	}else{           	    
             	strlcpy(info->type, CTP_NAME, I2C_NAME_SIZE);
-				printk("======detect ok !=====\n");
 				return 0;	
 	        }
 	}else{
@@ -239,31 +237,10 @@ void ctp_print_info(struct ctp_config_info info,int debug_level)
  * ctp_wakeup - function
  *
  */
-int ctp_wakeup(int status,int ms)
+int ctp_wakeup(int status)
 {
-	dprintk(DEBUG_INIT,"***CTP*** %s:status:%d,ms = %d\n",__func__,status,ms);
-
-	if (status == 0) {
-
-		if(ms == 0) {
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
-		}else {
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
-			msleep(ms);
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
-		}
-	}
-	if (status == 1) {
-		if(ms == 0) {
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
-		}else {
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 1);
-			msleep(ms);
-			__gpio_set_value(config_info.wakeup_gpio.gpio, 0);
-		}
-	}
-	msleep(5);
-
+    dprintk(DEBUG_INIT,"***CTP*** %s:status:%d\n",__func__,status);
+    __gpio_set_value(config_info.wakeup_gpio.gpio, status);
 	return 0;
 }
 
@@ -295,19 +272,15 @@ void gtp_set_io_int(void)
         
 }
 
-void gtp_io_init(int ms)
-{      
- 
-        ctp_wakeup(0, 0);
-        msleep(ms);
-        
-        gtp_set_int_value(0);
-        msleep(2);
-        
-        ctp_wakeup(1, 0);
-        msleep(6);       
-	gpio_direction_output(config_info.wakeup_gpio.gpio,1); 
-	gtp_int_sync(50);
+void gtp_io_init()
+{
+    input_set_power_enable(&(config_info.input_type), 1);
+    gtp_set_int_value(0);
+    ctp_wakeup(0);
+    msleep(4);
+    ctp_wakeup(1);
+    msleep(28);
+    gtp_set_io_int();
 }
 /*******************************************************************************/
 static ssize_t gtp_gesture_enable_store(struct device *dev,struct device_attribute *attr,const char *buf, size_t count)
@@ -1357,7 +1330,6 @@ Output:
 *******************************************************/
 void gtp_int_sync(s32 ms)
 {
-    gtp_set_int_value(0);
     msleep(ms);
     gtp_set_io_int();
 }
@@ -2713,11 +2685,11 @@ static int goodix_ts_probe(struct i2c_client *client, const struct i2c_device_id
     }
 #endif
 
-    ret = gtp_i2c_test(client);
-    if (ret < 0)
-    {
-        printk("I2C communication ERROR!");
-    }
+//    ret = gtp_i2c_test(client);
+//    if (ret < 0)
+//    {
+//        printk("I2C communication ERROR!");
+//    }
 
     ret = gtp_read_version(client, &version_info);
     if (ret < 0)
@@ -3249,10 +3221,10 @@ Output:
 ********************************************************/
 static int __devinit goodix_ts_init(void)
 {
+    printk("dzh-->GTP driver init\n");
     s32 ret = -1;
     script_item_u   val;
     script_item_value_type_e  type;
-    dprintk(DEBUG_INIT,"GTP driver init\n");
     if (input_fetch_sysconfig_para(&(config_info.input_type))) {
 		printk("%s: ctp_fetch_sysconfig_para err.\n", __func__);
 		return 0;
@@ -3282,8 +3254,6 @@ static int __devinit goodix_ts_init(void)
     if(!gtp_gesture_wakeup)
 	gtp_power_ctrl_sleep = 1;	
 
-    input_set_power_enable(&(config_info.input_type), 1);
-    msleep(10);
 
     if(!ctp_get_system_config()){
             printk("%s:read config fail!\n",__func__);
@@ -3292,7 +3262,7 @@ static int __devinit goodix_ts_init(void)
 	
 
     sunxi_gpio_to_name(CTP_IRQ_NUMBER,irq_pin_name);
-    gtp_io_init(20);
+    gtp_io_init();
 
     goodix_wq = create_singlethread_workqueue("goodix_wq");
     if (!goodix_wq)
@@ -3304,9 +3274,10 @@ static int __devinit goodix_ts_init(void)
     INIT_DELAYED_WORK(&gtp_esd_check_work, gtp_esd_check_func);
     gtp_esd_check_workqueue = create_workqueue("gtp_esd_check");
 #endif
-	goodix_ts_driver.detect = ctp_detect;	
+    goodix_ts_driver.detect = ctp_detect;
     ret = i2c_add_driver(&goodix_ts_driver);
-    return ret; 
+    printk("dzh-->GTP driver init done\n");
+    return ret;
 }
 
 /*******************************************************    

------------------ drivers/input/touchscreen/gt9xxnew/gt9xx.h ------------------
index c43f741..42384d9 100755
@@ -49,7 +49,7 @@
 #define GTP_HAVE_TOUCH_KEY    0
 #define GTP_ICS_SLOT_REPORT   0
 
-#define GTP_AUTO_UPDATE       1    // auto update fw by .bin file as default
+#define GTP_AUTO_UPDATE       0    // auto update fw by .bin file as default
 #define GTP_HEADER_FW_UPDATE  1    // auto update fw by gtp_default_FW in gt9xx_firmware.h, function together with GTP_AUTO_UPDATE
 #define GTP_AUTO_UPDATE_CFG   0    // auto update config by .cfg file, function together with GTP_AUTO_UPDATE
 
@@ -437,7 +437,8 @@ enum{
         printk("***CTP***"fmt, ## arg)
 ***************************************************************************/
 
-#define GTP_INFO(fmt,arg...)           printk("<<-GTP-INFO->> "fmt"\n",##arg)
+#define GTP_INFO(fmt,arg...)
+//#define GTP_INFO(fmt,arg...)           printk("<<-GTP-INFO->> "fmt"\n",##arg)
 #define GTP_ERROR(fmt,arg...)          printk("<<-GTP-ERROR->> "fmt"\n",##arg)
 #define GTP_DEBUG(fmt,arg...)          do{\
                                          if(GTP_DEBUG_ON)\

参考上电时序复位时序图