rk3288 lvds TF卡修改屏参
1，，以宽视屏M215HGE-L21_-奇美21.5液晶显示屏 为例说明修改屏参为题!! 奇美21.5寸规格书下载:
屏参文件dis.cfg， 如下：
[display_param]
screen-type = 3; //=2;为单8 =3；为双8 for LVDS
lvds-format = 0; //0=LVDS_VESA 1=LVDS_JEIDA 2=LVDS_XXX 3=LVDS_XX
out-face = 0;
color-mode = 0;
clock-frequency = 148000000;
hactive = 1920; //=x
vactive = 1080; //=y
hback-porch = 180;
hfront-porch = 97;
vback-porch = 30;
vfront-porch = 12;
hsync-len = 3;
vsync-len = 3;
hsync-active = 0;
vsync-active = 0;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
//hback-porch + hfront-porch =THB
//vback-porch + vfront-porch = TVB
一下说明如何配置参数的！！！！！依据液晶屏规格书
首先TF 建议使用4GB 以下的容量！！！！需要格式为FAT32
确保M320_PCB供电正常！，多拔插几次确保TF读取正常!
只有在开机过程才能读取屏参!!!!!!
修改dis.cfg 文件，，修改后放到TF卡里面上电开机就可以更改并保存屏参，，例如：/dou/dis.cfg
在TF卡根目录下建文件夹“dou”在">dou文件夹里面放"dis.cfg"文件
hback-porch + hfront-porch =THB
vback-porch + vfront-porch = TVB
fps必须=60hz，或者=50HZ
fps=(clock)/((hactive +THB)*(vactive + TVB))=60
fps =50HZ <= (clock-frequency)/{(hactive + hback-porch + hfront-porch + 3)*(vactive + vback-porch + vfront-porch + 3)} <= 60
/* lvds connect config
*
* lvds-format = 0 lvds-format = 1 lvds-format = 2 lvds-format = 3
----------------------------------------------------------------------
TX0 R0 R2 R2 R0
TX1 R1 R3 R3 R1
TX2 R2 R4 R4 R2
Y TX3 R3 R5 R5 R3
0 TX4 R4 R6 R6 R4
TX6 R5 R7 R7 R5
TX7 G0 G2 G2 G0
----------------------------------------------------------------------
TX8 G1 G3 G3 G1
TX9 G2 G4 G4 G2
Y TX12 G3 G5 G5 G3
1 TX13 G4 G6 G6 G4
TX14 G5 G7 G7 G5
TX15 B0 B2 B2 B0
TX18 B1 B3 B3 B1
----------------------------------------------------------------------
TX19 B2 B4 B4 B2
TX20 B3 B5 B5 B3
TX21 B4 B6 B6 B4
Y TX22 B5 B7 B7 B5
2 TX24 HSYNC HSYNC HSYNC HSYNC
TX25 VSYNC VSYNC VSYNC VSYNC
TX26 ENABLE ENABLE ENABLE ENABLE
----------------------------------------------------------------------
TX27 R6 R0 GND GND
TX5 R7 R1 GND GND
TX10 G6 G0 GND GND
Y TX11 G7 G1 GND GND
3 TX16 B6 B0 GND GND
TX17 B7 B1 GND GND
TX23 RSVD RSVD RSVD RSVD
----------------------------------------------------------------------
*/2，，一下参考规格书修改屏参说明
3#注意屏电压问题!!!
4#屏参问题
hback-porch + hfront-porch =THB ==140X2 = 280
vback-porch + vfront-porch = TVB == 45
fps必须=60hz，或者=50HZ
fps=(clock)/((hactive +THB)*(vactive + TVB))=60
fps =50HZ <= (clock-frequency)/{(hactive + hback-porch + hfront-porch + 3)*(vactive + vback-porch + vfront-porch + 3)} <= 60
vback-porch + vfront-porch = TVB == 45
fps必须=60hz，或者=50HZ
fps=(clock)/((hactive +THB)*(vactive + TVB))=60
fps =50HZ <= (clock-frequency)/{(hactive + hback-porch + hfront-porch + 3)*(vactive + vback-porch + vfront-porch + 3)} <= 60
5# 屏模式问题
如果出现水彩！！！
lvds-format = 0; 或者lvds-format = 1;
5#奇葩奇美42,10BIT_LVDS
屏参如下：
[display_param]
screen-type = 3;
lvds-format = 0;
out-face = 0;
color-mode = 0;
clock-frequency = 148600000;
hactive = 1920;
vactive = 1080;
hback-porch = 210;
hfront-porch = 16;
vback-porch = 34;
vfront-porch = 16;
hsync-len = 22;
vsync-len = 4;
hsync-active = 1;
vsync-active = 1;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
screen-type = 3;
lvds-format = 0;
out-face = 0;
color-mode = 0;
clock-frequency = 148600000;
hactive = 1920;
vactive = 1080;
hback-porch = 210;
hfront-porch = 16;
vback-porch = 34;
vfront-porch = 16;
hsync-len = 22;
vsync-len = 4;
hsync-active = 1;
vsync-active = 1;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
6#常规1920_1080——LVDS屏参
[display_param]
screen-type = 3;
lvds-format = 0;
out-face = 0;
color-mode = 0;
clock-frequency = 148000000;
hactive = 1920;
vactive = 1080;
hback-porch = 180;
hfront-porch = 97;
vback-porch = 30;
vfront-porch = 12;
hsync-len = 3;
vsync-len = 3;
hsync-active = 0;
vsync-active = 0;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
screen-type = 3;
lvds-format = 0;
out-face = 0;
color-mode = 0;
clock-frequency = 148000000;
hactive = 1920;
vactive = 1080;
hback-porch = 180;
hfront-porch = 97;
vback-porch = 30;
vfront-porch = 12;
hsync-len = 3;
vsync-len = 3;
hsync-active = 0;
vsync-active = 0;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
7# 15寸夏普和三菱LVDS--1024_768 DE模式
[display_param]
screen-type = 2;
lvds-format = 2;
out-face = 0;
color-mode = 0;
clock-frequency = 58000000;
hactive = 1024;
vactive = 768;
hback-porch = 120; //320 /2 =160 OK
hfront-porch = 40;
vback-porch = 20;
vfront-porch = 9;
hsync-len = 3;
vsync-len = 3;
hsync-active = 0;
vsync-active = 0;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end
screen-type = 2;
lvds-format = 2;
out-face = 0;
color-mode = 0;
clock-frequency = 58000000;
hactive = 1024;
vactive = 768;
hback-porch = 120; //320 /2 =160 OK
hfront-porch = 40;
vback-porch = 20;
vfront-porch = 9;
hsync-len = 3;
vsync-len = 3;
hsync-active = 0;
vsync-active = 0;
de-active = 0;
pixelclk-active = 0;
swap-rb = 0;
swap-rg = 0;
swap-gb = 0;
end