米尔-T133测试评-屏幕适配

yvwei

米尔-T133测试评-屏幕适配 [复制链接]

 

# 米尔-T133测试评-屏幕适配 编译完SDK后，体验了一番总感觉少了屏幕非常不舒服，从其他的开发板里翻出来一块7寸的lvds的屏幕，今天我就来点亮体验一下。  这是个单通道lvds，我们可以看到开发板的J6的座子恰好也是单通道lvds的接口，我根据引脚定义给屏幕画了个简单的转接板。  结果接上一顿调试发现屏幕一直花屏，可能是连接线太长了，导致信号有衰减，后面通过不得不通过J7的双通道lvds接口上，用杜邦线和屏幕连接点屏。  硬件连接完成之后通过修改，内核和uboot的设备树文件就可以了。 首先根据屏幕的时序修改，设备树文件：  内核设备树修改： ```bash vi kernel/linux-5.4/arch/arm/boot/dts/myir-t113-lvds.dtsi ``` ```c //single LVDS0 &lcd0 { lcd_used = <1>; lcd_driver_name = "default_lcd"; lcd_backlight = <100>; lcd_if = <3>; // lcd_x = <1024>; // lcd_y = <600>; // lcd_width = <154>; // lcd_height = <86>; // lcd_dclk_freq = <49>; lcd_x = <1024>; lcd_y = <600>; lcd_width = <150>; lcd_height = <94>; lcd_dclk_freq = <51>; lcd_pwm_used = <1>; lcd_pwm_ch = <2>; lcd_pwm_freq = <50000>; lcd_pwm_pol = <1>; lcd_pwm_max_limit = <255>; // lcd_hbp = <160>; // lcd_ht = <1324>; // lcd_hspw = <116>; // lcd_vbp = <24>; // lcd_vt = <629>; // lcd_vspw = <3>; lcd_hbp = <160>; lcd_ht = <1344>; lcd_hspw = <70>; lcd_vbp = <35>; lcd_vt = <650>; lcd_vspw = <1>; lcd_lvds_if = <1>; lcd_lvds_colordepth = <0>; lcd_lvds_mode = <0>; lcd_frm = <0>; lcd_hv_clk_phase = <0>; lcd_hv_sync_polarity= <0>; lcd_gamma_en = <0>; lcd_bright_curve_en = <0>; lcd_cmap_en = <0>; deu_mode = <0>; lcdgamma4iep = <22>; smart_color = <90>; pinctrl-0 = <&lvds0_pins_a>; pinctrl-1 = <&lvds0_pins_b>; }; ``` uboot设备树修改： ```bash' vi brandy/brandy-2.0/u-boot-2018/arch/arm/dts/myir-t113-lvds.dtsi ``` ```c //single LVDS0 &lcd0 { lcd_used = <1>; lcd_driver_name = "default_lcd"; lcd_backlight = <100>; lcd_if = <3>; // lcd_x = <1024>; // lcd_y = <600>; // lcd_width = <154>; // lcd_height = <86>; // lcd_dclk_freq = <49>; lcd_x = <1024>; lcd_y = <600>; lcd_width = <150>; lcd_height = <94>; lcd_dclk_freq = <51>; lcd_pwm_used = <1>; lcd_pwm_ch = <2>; lcd_pwm_freq = <50000>; lcd_pwm_pol = <1>; lcd_pwm_max_limit = <255>; // lcd_hbp = <160>; // lcd_ht = <1324>; // lcd_hspw = <116>; // lcd_vbp = <24>; // lcd_vt = <629>; // lcd_vspw = <3>; lcd_hbp = <160>; lcd_ht = <1344>; lcd_hspw = <70>; lcd_vbp = <35>; lcd_vt = <650>; lcd_vspw = <1>; lcd_lvds_if = <1>; lcd_lvds_colordepth = <0>; lcd_lvds_mode = <0>; lcd_frm = <0>; lcd_hv_clk_phase = <0>; lcd_hv_sync_polarity= <0>; lcd_gamma_en = <0>; lcd_bright_curve_en = <0>; lcd_cmap_en = <0>; deu_mode = <0>; lcdgamma4iep = <22>; smart_color = <90>; pinctrl-0 = <&lvds0_pins_a>; pinctrl-1 = <&lvds0_pins_b>; }; ``` 编译打包： ```bash ./build.sh ./build.sh pack ``` 启动板发现开机logo已经出来了：  花屏测试 ``` cat /dev/urandom > /dev/fb0 ```  colorbar 测试 ``` echo 8 > /sys/class/disp/disp/attr/colorbar ``` 

Jacktang

内核和uboot的设备树文件,硬件连接完成之后是需要修改滴，是这样子的

freebsder

谢谢分享，威震八方！