全志V853开发板MIPI显示屏适配指南

aleksib

全志V853开发板MIPI显示屏适配指南 [复制链接]

## 1.添加新驱动

将驱动程序添加到

内核的lcd驱动目录下：

`tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd`

uboot的lcd驱动目录下：

`tina-v853-open/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/`

由于uboot和内核中的屏驱动会存在一些差别，下面分别展示出uboot和内核中不同的屏驱动。具体源文件可以在4寸屏适配资源包中查看。

### 1.1 uboot驱动程序

驱动程序头文件tft08006.h

```c
#ifndef _TFT08006_H
#define _TFT08006_H

#include "panels.h"

extern __lcd_panel_t tft08006_panel;

extern s32 bsp_disp_get_panel_info(u32 screen_id, disp_panel_para *info);

#endif /*End of file*/
```

驱动程序的C文件tft08006.c

这里只展示与内核不同的部分

```c
__lcd_panel_t tft08006_panel = {
        /* panel driver name, must mach the name of
         * lcd_drv_name in sys_config.fex
         */
        .name = "tft08006",
        .func = {
                .cfg_panel_info = lcd_cfg_panel_info,
                        .cfg_open_flow = lcd_open_flow,
                        .cfg_close_flow = lcd_close_flow,
                        .lcd_user_defined_func = lcd_user_defined_func,
        },
};
```

### 1.2 内核驱动程序

驱动程序头文件tft08006.h

```c
#ifndef _TFT08006_H
#define _TFT08006_H

#include "panels.h"

extern struct __lcd_panel tft08006_panel;

extern s32 bsp_disp_get_panel_info(u32 screen_id, struct disp_panel_para *info);

#endif /*End of file*/
```

驱动程序的C文件"tft08006.c，这里只展示与uboot不同的部分。

```c
struct __lcd_panel tft08006_panel = {
        /* panel driver name, must mach the name of
         * lcd_drv_name in sys_config.fex
         */
        .name = "tft08006",
        .func = {
                .cfg_panel_info = lcd_cfg_panel_info,
                        .cfg_open_flow = lcd_open_flow,
                        .cfg_close_flow = lcd_close_flow,
                        .lcd_user_defined_func = lcd_user_defined_func,
        },
};
```

## 2.修改内核中panels.h和panels.c

由于内核中没有对tft08006屏驱动有相关的配置，所以我们还需要在panels全志显示驱动中增加定义。

### 2.1 修改内核中panels.h

在屏驱动目录下修改panels.h

```ruby
book<a href="https://bbs.eeworld.com.cn/home.php?mod=space&uid=490" target="_blank">@1</a> 00ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi panels.h
```

在icn6202屏驱动定义的后面增加tft08006屏驱动定义

```c
#ifdef CONFIG_LCD_SUPPORT_ICN6202
extern struct __lcd_panel icn6202_panel;
#endif
#ifdef CONFIG_LCD_SUPPORT_ICN6202
extern struct __lcd_panel icn6202_panel;
#endif
#ifdef CONFIG_LCD_SUPPORT_NT35510_MIPI
extern struct __lcd_panel nt35510_panel;
#endif
```

按下ESC，输入`:wq`，保存刚才的修改并退出

### 2.2 修改内核中panels.c

在屏驱动目录下修改panels.c

```ruby
book@100ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi panels.c
```

在icn6202屏驱动定义的后面增加tft08006屏驱动定义

```c
#ifdef CONFIG_LCD_SUPPORT_ICN6202
       &icn6202_panel,
#endif
#ifdef CONFIG_LCD_SUPPORT_TFT08006
        &tft08006_panel,
#endif

#ifdef CONFIG_LCD_SUPPORT_NT35510_MIPI
        &nt35510_panel,
#endif
```

按下ESC，输入`:wq`，保存刚才的修改并退出

## 3.修改内核中Kconfig和Makefile

### 3.1 修改内核中的Kconfig

修改屏驱动目录下的Kconfig，使内核配置中增加tft08006屏驱动的，以便后续选择编译该屏驱动

在屏驱动目录下输入`vi Kconfig`

```bash
tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi Kconfig
```

在icn6202屏驱动配置的后面增加tft08006屏驱动配置

```c
config LCD_SUPPORT_ICN6202
       bool "LCD support icn6202 panel"
       default n
       ---help---
               If you want to support icn6202 panel for display driver, select it.

config LCD_SUPPORT_TFT08006
       bool "LCD support tft08006 panel"
       default n
       ---help---
               If you want to support tft08006 panel for display driver, select it.

config LCD_SUPPORT_NT35510_MIPI
        bool "LCD support nt35510_mipi panel"
        default n
        help
                If you want to support nt35510_mipi panel for display driver, select it.
```

按下ESC，输入`:wq`，保存刚才的修改并退出

### 3.2 修改内核中的Makefile

返回屏驱动的上一级目录，修改Makefile文件

```ruby
book@100ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp$ vi Makefile
```

在icn6202屏驱动编译规则的后面增加tft08006屏驱动编译规则

```c
disp-$(CONFIG_LCD_SUPPORT_ICN6202) += lcd/icn6202.o
disp-$(CONFIG_LCD_SUPPORT_TFT08006) += lcd/tft08006.o
disp-$(CONFIG_LCD_SUPPORT_NT35510_MIPI) += lcd/nt35510.o
```

按下ESC，输入`:wq`，保存刚才的修改并退出

## 4.修改内核配置

在Tina的根目录下输入`make kernel_menuconfig`,进入内核配置界面。

```ruby
book@100ask:~/workspaces/tina-v853-open$ make kernel_menuconfig
```

在选中屏驱动前，要确保`DISP Driver Support(sunxi-disp2) `，我们的提供的SDK默认已经打开了，如果您之前关闭了，需要在内核配置界面中，进入`Video support for sunxi`目录下输入Y选中`sunxi-disp2`打开lcd节点配置。

```scss
→ Device Drivers 
	→ Graphics support 
		→ Frame buffer Devices 
			→ Video support for sunxi
				<*> DISP Driver Support(sunxi-disp2)
```

进入屏驱动目录，输入Y选中tft08006

```css
→ Device Drivers 
	→ Graphics support 
		→ Frame buffer Devices 
			→ Video support for sunxi 
				→ LCD panels select 
					<li> LCD support tft08006 panel
```

如下图所示，选中tft08006屏驱动，编译到内核中。

[![image-20230412141639648](https://forums.100ask.net/uploads/default/optimized/2X/9/9fa779c6e1a12e5fd7afece6eba354ade96fb0ad_2_690x409.png)

保存并退出内核配置界面。

## 5.修改uboot配置

进入uboot的根目录下，执行`make menuconfig`，打开uboot配置界面。

```ruby
book@100ask:~/workspaces/tina-v853-open/brandy/brandy-2.0/u-boot-2018$ make menuconfig
```

在选中屏驱动前，要确保`DISP Driver Support(sunxi-disp2) `，我们的提供的SDK默认已经打开了，如果您之前关闭了，需要在内核配置界面中，进入`Graphics support`目录下输入Y选中`sunxi-disp2`打开lcd节点配置。

```scss
→ Device Drivers 
	→ Graphics support 
		<li> DISP Driver Support(sunxi-disp2) --->
```

进入屏驱动目录下，输入Y选中TFT08006屏驱动。

```csharp
→ Device Drivers 
	→ Graphics support 
		→ LCD panels select 
			 <li> LCD support TFT08006 panel
```

如下图所示，选中tft08006屏驱动。

[![image-20230412143445778](https://forums.100ask.net/uploads/default/optimized/2X/5/5ba1916ea36ffe103b1148257559abd58152a9ac_2_690x409.png)

保存并退出uboot配置界面

## 6.修改设备树

设备树位置：tina-v853-open/device/config/chips/v853/configs/100ask/

```ruby
book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ ls
BoardConfig.mk  board.dts  buildroot  env.cfg  linux-4.9  sys_config.fex  uboot-board.dts
```

其中board.dts为内核设备树，uboot-board.dts为uboot设备树。

### 6.1 修改uboot设备树

在设备树的目录下输入`vi uboot-board.dts`，编译uboot设备树。

```ruby
book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi uboot-board.dts
```

注释掉原来的lcd0节点，修改tft08006屏lcd0节点

```markdown
&lcd0 {
 base_config_start = <1>;
 lcd_used = <1>;

lcd_driver_name     = "tft08006";

lcd_backlight = <500>;
 lcd_if = <4>;

lcd_x = <480>;
 lcd_y = <800>;
 lcd_width = <52>;
 lcd_height = <52>;
 lcd_dclk_freq = <25>;

lcd_pwm_used = <1>;
 lcd_pwm_ch = <9>;
 lcd_pwm_freq = <50000>;
 lcd_pwm_pol = <1>;
 lcd_pwm_max_limit = <255>;

lcd_hbp = <10>;
 lcd_ht = <515>;
 lcd_hspw = <5>;

lcd_vbp = <20>;
 lcd_vt = <830>;
 lcd_vspw = <5>;

lcd_dsi_if = <0>;
 lcd_dsi_lane = <2>;
 lcd_dsi_format = <0>;
 lcd_dsi_te = <0>;
 lcd_dsi_eotp = <0>;
 lcd_frm = <0>;
 lcd_io_phase = <0x0000>;
 lcd_hv_clk_phase = <0>;
 lcd_hv_sync_polarity= <0>;
 lcd_gamma_en = <0>;
 lcd_bright_curve_en = <0>;
 lcd_cmap_en = <0>;
 lcdgamma4iep = <22>;

lcd_gpio_0 = <&pio PH 0 1 0 3 1>;
 pinctrl-0 = <&dsi4lane_pins_a>;
 pinctrl-1 = <&dsi4lane_pins_b>;
 base_config_end = <1>;

};
```

在&pio节点后增加复用引脚

```bash
dsi4lane_pins_a: dsi4lane@0 {
 allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,function = "dsi";
 allwinner,muxsel = <5>;
 allwinner,drive = <3>;
 allwinner,pull = <0>;
 };

dsi4lane_pins_b: dsi4lane@1 {
 allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "DP11";
 allwinner,function = "io_disabled";
 allwinner,muxsel = <0xf>;
 allwinner,drive = <1>;
 allwinner,pull = <0>;
 };
```

### 6.2 修改内核设备树

在设备树的目录下输入`vi board.dts`，编译内核设备树。

```ruby
book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi board.dts
```

注释掉原来的lcd0节点，修改tft08006屏lcd0节点

```markdown
&lcd0 {
 base_config_start = <1>;
 lcd_used = <1>;

lcd_driver_name     = "tft08006";

lcd_backlight = <500>;
 lcd_if = <4>;

lcd_x = <480>;
 lcd_y = <800>;
 lcd_width = <52>;
 lcd_height = <52>;
 lcd_dclk_freq = <25>;

lcd_pwm_used = <1>;
 lcd_pwm_ch = <9>;
 lcd_pwm_freq = <50000>;
 lcd_pwm_pol = <1>;
 lcd_pwm_max_limit = <255>;

lcd_hbp = <10>;
 lcd_ht = <515>;
 lcd_hspw = <5>;

lcd_vbp = <20>;
 lcd_vt = <830>;
 lcd_vspw = <5>;

lcd_dsi_if = <0>;
 lcd_dsi_lane = <2>;
 lcd_dsi_format = <0>;
 lcd_dsi_te = <0>;
 lcd_dsi_eotp = <0>;
 lcd_frm = <0>;
 lcd_io_phase = <0x0000>;
 lcd_hv_clk_phase = <0>;
 lcd_hv_sync_polarity= <0>;
 lcd_gamma_en = <0>;
 lcd_bright_curve_en = <0>;
 lcd_cmap_en = <0>;
 lcdgamma4iep = <22>;

lcd_gpio_0 = <&pio PH 0 1 0 3 1>;
 pinctrl-0 = <&dsi4lane_pins_a>;
 pinctrl-1 = <&dsi4lane_pins_b>;
 base_config_end = <1>;

};
```

在&pio节点后增加复用引脚

```bash
dsi4lane_pins_a: dsi4lane@0 {
 allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,function = "dsi";
 allwinner,muxsel = <5>;
 allwinner,drive = <3>;
 allwinner,pull = <0>;
 };

dsi4lane_pins_b: dsi4lane@1 {
 allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
 allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "DP11";
 allwinner,function = "io_disabled";
 allwinner,muxsel = <0xf>;
 allwinner,drive = <1>;
 allwinner,pull = <0>;
 };
```

## 7.增加I2C触摸

通过拿到的屏幕资料包，我们可以知道该MIPI屏的触摸芯片为FT5336，下面我们使用全志已经内置好的FT6336触摸驱动。

### 7.1 修改设备树

修改twi2节点，使用ft6336驱动，修改触摸的范围。宽X为480，高y为800。其中初始化引脚需要查看V853底板原理图，其中初始化引脚为PH7，唤醒引脚为PH8。

[![image-20230414193438036](https://forums.100ask.net/uploads/default/optimized/2X/1/1008e9c8b8ffa2f5dfc9c3d55ddc13c66dffe52a_2_690x51.png)

```kotlin
&twi2 {
 ctp@38 {
 status = "okay";
 ctp_used = <1>;
 ctp_name = "ft6336";
 ctp_twi_id = <0x2>;
 ctp_twi_addr = <0x38>;
 ctp_screen_max_x = <0x480>;
 ctp_screen_max_y = <0x800>;
 ctp_revert_x_flag = <0x0>;
 ctp_revert_y_flag = <0x1>;
 ctp_exchange_x_y_flag = <0x0>;
 ctp_int_port = <&pio PH 7 6 1 3 0xffffffff>;
 ctp_wakeup = <&pio PH 8 1 1 3 0xffffffff>;
 };
};
```

### 7.2 修改内核配置

由于我们之前适配过了RGB屏触摸驱动，所以需要进入内核中修改为我们使用的新驱动，进入如下目录中，按下空格键取消勾选之前的触摸驱动gt9xxnew touchscreen driver，输入Y选中我们使用的ft6336 touchscreen driver新驱动，并保存退出。

```css
→ Device Drivers 
	→ Input device support 
		→ Touchscreens
			<*> ft6336 touchscreen driver
```

[![image-20230414193735639](https://forums.100ask.net/uploads/default/optimized/2X/3/32462733491af998e0b67a0030320a086c475995_2_690x410.png)

### 7.3 修改驱动程序

修改ft6336.c触摸驱动程序，这里只展示修改的部分，源文件可见4寸屏适配资源包中查看。

```rust
input_report_abs(ts->input_dev,
 ABS_MT_POSITION_X, -(event->au16_x-480));
 input_report_abs(ts->input_dev,
 ABS_MT_POSITION_Y, -(event->au16_y-800));
```

### 7.4 LVGL绑定新触摸节点

由于Tina使用的默认绑定的触摸节点为/dev/input/event0，我们需要修改lvgl驱动头文件中绑定的节点为我们触摸驱动上报数据的节点，我们触摸驱动上报的节点为event2，所以需要进入

`tina-v853-open/platform/thirdparty/gui/lvgl-8/lv_examples/src`目录下修改lv_drv_conf.h头文件，如下所示

```shell
book@100ask:~/workspaces/tina-v853-open$ cd platform/thirdparty/gui/lvgl-8/lv_examples/src/
book@100ask:~/workspaces/tina-v853-open/platform/thirdparty/gui/lvgl-8/lv_examples/src$ vi lv_drv_conf.h
```

找到触摸节点中的`LIBINPUT_NAME`，将原来的`/dev/input/event0`修改`/dev/input/event2`,如下图红框内所示。

[![image-20230417101852786](https://forums.100ask.net/uploads/default/original/2X/5/56741814239eb0d490663e1fac7306bbf38e6d3b.png)

注意：我们这里修改的是头文件，可能之前编译生成过了之后再重新编译时可能不会再编译头文件，导致修改的节点不会生效，可以手动删除out目录中的`lv_examples`示例程序或者直接删除out目录重新编译即可。具体原因可以观看韦东山老师的《ARM架构与编程》课程中的gcc编译过程详解。访问链接为

## 8.编译系统并打包生成镜像

返回Tina根目录下，输入`make`,编译系统

```shell
book@100ask:~/workspaces/tina-v853-open$ make -j4
...
sun8iw21p1 compile Kernel successful
INFO: ----------------------------------------
INFO: build Tina OK.
INFO: ----------------------------------------
```

打包生成镜像，输入`pack`

```shell
book@100ask:~/workspaces/tina-v853-open$ pack
...
Dragon execute image.cfg SUCCESS !
----------image is at----------

33M     /home/book/workspaces/tina-v853-open/out/v853/100ask/openwrt/v853_linux_100ask_uart0.img

pack finish
```

## 9.烧录并测试

打包完成后，将新生成的镜像拷贝到Windows主机电脑上，使用全志PhoenixSuit烧写工具，烧写到开发板上。具体可以参考：

接完排线后，重新接入电源，和2条Type-C数据线，再将开关拨向电源接口处上电启动，启动时会出现Tina Linux小企鹅logo，进入系统后，可以查看触摸节点

```ruby
root@TinaLinux:/# ls /dev/input/
event0  event1  event2
```

我们使用的event2，如果你不确定您的触摸驱动程序使用的是哪个，可以通过`cat /dev/input/event*`，其中`*`表示要查看的是哪一个触摸节点，例如我使用的是event2，则需要输入`cat /dev/input/event2`，此时触摸屏幕会有上报信息。

使用LVGL DEMO示例，输入`lv_examples 0`启动lvgl示例，可以通过点击屏幕上的UI交互按钮测试触摸是否生效。

```shell
root@TinaLinux:/# lv_examples 0
wh=480x800, vwh=480x1600, bpp=32, rotated=0
Turn on double buffering.
Turn on 2d hardware acceleration.
Turn on 2d hardware acceleration rotate.
```

humancat01

我非常支持使用国产芯片

lugl4313820

通过拿到的屏幕资料包，我们可以知道该MIPI屏的触摸芯片为FT5336，下面我们使用全志已经内置好的FT6336触摸驱动。

触摸驱动还是有点小麻烦。

全志V853开发板MIPI显示屏适配指南 [复制链接]

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