跳转至

MIPI屏幕TFT08006支持

屏幕简介

TFT08006官方支持的一款MIPI屏幕,8寸,分辨率800*1280。官方套装支持触控。

image-20210517162453625

下载

MIPI屏幕 TFT08006 patch: https://developer.allwinnertech.com/downloads/resources/27

MIPI屏幕 TFT08006 相关资料见:https://developer.allwinnertech.com/downloads/resources/28

getevent demo ,用于D1按键或屏幕触摸测试:https://developer.allwinnertech.com/downloads/resources/26

调试方法

1.【仅限内测v0.5*版本需要做】将 configs.patch 文件复制到 tina/device/config/chips/d1 目录下,

git apply configs.patch

打上patch

2.【仅限内测v0.5*版本需要做】将 uboot下的 0001-K1-sun20iw1p1-P2-disp-add-tft08006-panel-driver.patch 文件复制到 tina/lichee/brandy-2.0/u-boot-2018 目录下,

git apply 0001-K1-sun20iw1p1-P2-disp-add-tft08006-panel-driver.patch

打上patch

3.【仅限内测v0.5*版本需要做】将 kernel下的 0001-K1-sun20iw1p1-P2-disp-add-tft08006-panel-driver.patch 文件复制到 tina/lichee/linux-5.4 目录下,

git apply 0001-K1-sun20iw1p1-P2-disp-add-tft08006-panel-driver.patch 

打上patch

4.make kernel_menuconfig选中

│ Symbol: LCD_SUPPORT_TFT08006 [=y]                                                                                                                                                                     │
  │ Type  : bool                                                                                                                                                                                          │
  │ Prompt: LCD support TFT08006 panel                                                                                                                                                                    │
  │   Location:                                                                                                                                                                                           │
  │     -> Device Drivers                                                                                                                                                                                 │
  │       -> Graphics support                                                                                                                                                                             │
  │         -> Frame buffer Devices                                                                                                                                                                       │
  │           -> Video support for sunxi                                                                                                                                                                  │
  │ (1)         -> LCD panels select                                                                                                                                                                      │
  │   Defined at drivers/video/fbdev/sunxi/disp2/disp/lcd/Kconfig:178                                                                                                                                     │
  │   Depends on: HAS_IOMEM [=y] && FB [=y] && DISP2_SUNXI [=y]   

目录下其它项可以全部取消选择

5.make menuconfig中选中:

Kernel modules > Input modules >  <*> kmod-touchscreen-gt9xxnew

6.触摸demo make menuconfig选中Utilities-->getevent 在设备端运行getevent,再触摸屏幕则会打印触摸的屏幕坐标值 patch压缩包里放了一个getevent_d1 demo,可以直接将其adb push 到设备下运行

运行后触摸屏幕,如果正常会有如下打印:

root@TinaLinux:/# ./getevent_d1
add device 1: /dev/input/event2
  name:     "gt9xxnew_ts"
add device 2: /dev/input/event1
  name:     "audiocodec sunxi Audio Jack"
add device 3: /dev/input/event0
  name:     "sunxi-keyboard"
poll 4, returned 1
/dev/input/event2: 0001 014a 00000001
poll 4, returned 1
/dev/input/event2: 0003 0035 0000016a
poll 4, returned 1
/dev/input/event2: 0003 0036 00000091
poll 4, returned 1
/dev/input/event2: 0003 0030 00000019
poll 4, returned 1
/dev/input/event2: 0003 0032 00000019
poll 4, returned 1
/dev/input/event2: 0003 0039 00000000
poll 4, returned 1
/dev/input/event2: 0000 0002 00000000
poll 4, returned 1
/dev/input/event2: 0000 0000 00000000
poll 4, returned 1
/dev/input/event2: 0003 0035 0000016a
poll 4, returned 1
/dev/input/event2: 0003 0036 00000091
poll 4, returned 1
/dev/input/event2: 0003 0030 00000019
poll 4, returned 1
/dev/input/event2: 0003 0032 00000019
poll 4, returned 1
/dev/input/event2: 0003 0039 00000000
poll 4, returned 1
/dev/input/event2: 0000 0002 00000000
poll 4, returned 1
/dev/input/event2: 0000 0000 00000000
poll 4, returned 1
/dev/input/event2: 0003 0035 0000016a
poll 4, returned 1
/dev/input/event2: 0003 0036 00000091
poll 4, returned 1
……

V1.0版本支持显示

Tina D1 V1.0版本不支持背光调节,使用当前淘宝店卖的屏幕可能点不亮,需要做如下修改:

将tina/device/config/chips/d1/configs/nezha/linux-5.4/board.dts中的lcd0节点内的lcd_pwm_freq修改为
lcd_pwm_freq        = <1000>;

V1.01及后续版本均可直接使用屏幕并进行背光调节。

背光亮度调节的方法

mount -t debugfs none /sys/kernek/debug;
cd /sys/kernel/debug/dispdbg;

/* 设置背光亮度为100 */
echo lcd0 > name;echo setbl > command;echo 100 > param;echo 1 > start;
/* 设置背光亮度为0 */
echo lcd0 > name;echo setbl > command;echo 0 > param;echo 1 > start;

若以上命令无法调节背光亮度,则需检查屏幕转接板的硬件: 结合屏幕转接板原理图,需将背光模块的R6接上1K电阻(注意R4的阻值≥10K或置空,R7置空)

转接板原理图

image-20210609095825950