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标题: 急！单mipi屏点不亮！ [打印本页]

作者: yfygs 时间: 2016-1-14 09:31
标题: 急！单mipi屏点不亮！
请高手帮忙！mipi屏幕一直点不亮。屏的配置如下，初始化code跟屏那边确认过是正确的。以下是屏的配置:
/ {
/* about mipi */
disp_mipi_init: mipi_dsi_init{
compatible = "rockchip,mipi_dsi_init";
rockchip,screen_init = <1>;
rockchip,dsi_lane = <4>;
rockchip,dsi_hs_clk = <1000>;
rockchip,mipi_dsi_num = <1>;
};
disp_mipi_power_ctr: mipi_power_ctr {
compatible = "rockchip,mipi_power_ctr";
mipi_lcd_rst:mipi_lcd_rst{
compatible = "rockchip,lcd_rst";
rockchip,gpios = <&gpio7 GPIO_A4 GPIO_ACTIVE_LOW>;
rockchip,delay = <10>;
};
/*
mipi_lcd_en:mipi_lcd_en {
compatible = "rockchip,lcd_en";
rockchip,gpios = <&gpio0 GPIO_C1 GPIO_ACTIVE_HIGH>;
rockchip,delay = <100>;
};*/
};
disp_mipi_init_cmds: screen-on-cmds {

compatible = "rockchip,screen-on-cmds";

rockchip,cmd_debug = <1>;

                  rockchip,on-cmds1 {
                                                      compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xb9 0xff 0x83 0x94>;//SETEXTC
rockchip,cmd_delay = <0>;
};

                  rockchip,on-cmds2 {
                                                      compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x13 0xba 0x33>; //SETMIPI
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds3 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xb1 0x64 0x10 0x30 0x43 0x34 0x11 0xf1 0x00 0xe4 0x7e 0x34 0x80 0xc0 0xd2 0x42>;//SETPOWER
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds4 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xb2 0x45 0x64 0x0f 0x09 0x40 0x1c 0x08 0x08 0x1c 0x4d 0x00 0x00>;//SETDISP
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds5 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xb4 0x07 0x6e 0x07 0x71 0x6f 0x70 0x00 0x00 0x01 0x6e 0x0f 0x6e>;//SETCYC
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds6 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x23 0xb6 0x7f 0x7f>;//SETVCOM
rockchip,cmd_delay = <0>;
};
rockchip,on-cmds7 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x13 0xcc 0x01>;//SETPANEL
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds8 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xd3 0x00 0x08 0x00 0x00 0x00 0x00 0x00 0x32 0x10 0x0a 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x33 0x00 0x0d 0x00 0x47 0x00 0x00 0x00 0x0f 0x08>; //SETGIP0
rockchip,cmd_delay = <0>;
};
rockchip,on-cmds9 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xd5 0x03 0x02 0x03 0x02 0x01 0x00 0x01 0x00 0x07 0x06 0x07 0x06 0x05 0x04 0x05 0x04 0x21 0x20 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x23 0x22 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18 0x18>;//SETGIP1
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds10 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xe0 0x01 0x10 0x15 0x26 0x2a 0x3e 0x21 0x3d 0x07 0x0b 0x0c 0x17 0x0e 0x12 0x14 0x12 0x13 0x0a 0x18 0x1f 0x1f 0x01 0x10 0x15 0x26 0x2a 0x3e 0x21 0x3d 0x07 0x0b 0x0c 0x17 0x0e 0x12 0x14 0x12 0x13 0x0a 0x18 0x1f 0x1f>; //SETGAMMA
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds11 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x13 0xbc 0x07>;//
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds12 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x29 0xc9 0x1f 0x2e 0x1e 0x1e 0x10>;//SETCABC
rockchip,cmd_delay = <0>;
};

rockchip,on-cmds13 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x05 dcs_exit_sleep_mode>;
rockchip,cmd_delay = <180>;
};
rockchip,on-cmds14 {
                  compatible = "rockchip,on-cmds";
rockchip,cmd_type = <LPDT>;
rockchip,dsi_id = <0>;
rockchip,cmd = <0x05 dcs_set_display_on>;
rockchip,cmd_delay = <20>;
};

};

disp_timings: display-timings {
                     native-mode = <&timing0>;
                     compatible = "rockchip,display-timings";
                     timing0: timing0 {
screen-type = <SCREEN_MIPI>;
lvds-format = <LVDS_8BIT_1>;
out-face = <OUT_P888>;
clock-frequency = <68000000>;
hactive = <800>;
vactive = <1280>;
hback-porch = <48>;/*type 48*/
hfront-porch = <16>;/*16*/
vback-porch = <4>;
vfront-porch = <8>;
hsync-len = <16>;/*16*/
vsync-len = <4>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <0>;
swap-rb = <0>;
swap-rg = <0>;
swap-gb = <0>;
};
};
};

作者: yfygs 时间: 2016-1-14 09:34
屏datasheet参数

时序.jpg (123.08 KB, 下载次数: 635)

作者: yfygs 时间: 2016-1-14 09:38
clock-frequency这个属性是设置给LCDC的吧？时钟lane是经过这个DCLK分频还是直接就是这个DCLK?

作者: madman 时间: 2016-1-14 10:03
用的那个sdk，背光和
&dsihost0 {
status = "okay";
};
有没有配

作者: yfygs 时间: 2016-1-14 12:34

madman 发表于 2016-1-14 10:03
用的那个sdk，背光和
&dsihost0 {
status = "okay";

PAD。。。
该配的都有配，背光是亮的。

5.jpg (84.63 KB, 下载次数: 638)

作者: madman 时间: 2016-1-15 09:20

yfygs 发表于 2016-1-14 12:34
PAD。。。
该配的都有配，背光是亮的。

这种如果颜色类型和初始化指令没错的话，检查一下上电时序或者clk。排线之类的也可能有问题

作者: yfygs 时间: 2016-1-15 13:57

madman 发表于 2016-1-15 09:20
这种如果颜色类型和初始化指令没错的话，检查一下上电时序或者clk。排线之类的也可能有问题

上电时序都有按照datasheet来，dts里clock-frequency这个配置DCLK，它跟时钟lane输出的有什么关系呢？这个小弟有点不清楚。有用单探头非差分探头去测过时钟lane，大致在430-530，示波器比较差，测得的不是很固定。

作者: yfygs 时间: 2016-1-15 13:58

madman 发表于 2016-1-15 09:20
这种如果颜色类型和初始化指令没错的话，检查一下上电时序或者clk。排线之类的也可能有问题

时钟lane:

时钟lane.png (29.82 KB, 下载次数: 607)

作者: yfygs 时间: 2016-1-15 14:22

madman 发表于 2016-1-15 09:20
这种如果颜色类型和初始化指令没错的话，检查一下上电时序或者clk。排线之类的也可能有问题

datasheet屏的上电:我只测1.8V、3.3V、reset的上电时序。以下是datasheet的上电

上电.jpg (74.72 KB, 下载次数: 622)

作者: lqxandroid2012 时间: 2016-9-22 18:08
楼主，最后发现时什么原因，这种感觉是参数问题原因较大，和clk 不匹配。

作者: 猫不吃麻烦鱼 时间: 2016-10-14 09:15
现在也在调mipi屏，看这个帖子很给力

作者: loading 时间: 2016-10-14 10:18
rockchip,dsi_hs_clk = <1000>; 降低一下这个试试，，，这个按参数算出来是多少？

作者: proboy_li 时间: 2016-11-29 09:24
路过，看看

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