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我需要AM4378 接 高清屏，65MHZ时钟，1280*800分辨率，是否可以修改DTS文件就可以？
lcd0: display {
compatible = "osddisplays,osd070t1718-19ts", "panel-dpi";
label = "lcd";
backlight = <&lcd_bl>;
panel-timing {
clock-frequency = <33000000>;
hactive = <800>;
vactive = <480>;
hfront-porch = <210>;
hback-porch = <16>;
hsync-len = <30>;
vback-porch = <10>;
vfront-porch = <22>;
vsync-len = <13>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
pixelclk-active = <1>;
};
port {
lcd_in: endpoint {
remote-endpoint = <&dpi_out>;
};
};
我修改了DTS中的clock-frequency = <65000000>;也修改了hactive = <1280>;vactive = <800>;但是我测量下发现输出的PCLK似乎还是33MHZ，我的版本是最新的６的版本。
还是需要自己写driver?
如果自己写，有否相应的参考模板，谢谢！
Shine：
是否有参考过下面的文档？
wiki.tiprocessors.com/…/Sitara_Linux_LCDC_Porting_Guide
yuanjianhua yuanjianhua：
回复 Shine:
您好，
我用的是ti-processor-sdk-linux-am437x-evm-06.00.00.07，DEFCONFIG=tisdk_am437x-evm_defconfig，dtsfile :am437x-gp-evm.dts
我做了个测试，将 aliases { display0 = &lcd0; }; lcd0: display { compatible = "osddisplays,osd070t1718-19ts", "panel-dpi"; label = "lcd";
backlight = <&lcd_bl>
panel-timing {
clock-frequency = <33000000>; hactive = <800>; vactive = <480>; hfront-porch = <210>; hback-porch = <16>; hsync-len = <30>; vback-porch = <10>; vfront-porch = <22>; vsync-len = <13>; hsync-active = <0>; vsync-active = <0>; de-active = <1>; pixelclk-active = <1>;
};
port { lcd_in: endpoint { remote-endpoint = <&dpi_out>; }; }; };
&dss { status = "ok";
pinctrl-names = "default"; pinctrl-0 = <&dss_pins>;
port { dpi_out: endpoint { remote-endpoint = <&lcd_in>; data-lines = <24>; }; };};修改为
panel { compatible = "ti,tilcdc,panel"; status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&dss_pins>; panel-info { ac-bias = <255>; ac-bias-intrpt = <0>; dma-burst-sz = <16>; bpp = <32>; fdd = <0x80>; sync-edge = <0>; sync-ctrl = <1>; raster-order = <0>; fifo-th = <0>; }; display-timings { 800x480p60 { clock-frequency = <33000000>; hactive = <800>; vactive = <480>; hfront-porch = <210>; hback-porch = <16>; hsync-len = <30>; vback-porch = <10>; vfront-porch = <22>; vsync-len = <13>; hsync-active = <0>; vsync-active = <0>; de-active = <1>; pixelclk-active = <1>; }; };
port { lcd_in: endpoint { remote-endpoint = <&dpi_out>; }; }; }; &dss { status = "ok";
port { dpi_out: endpoint { remote-endpoint = <&lcd_in>; data-lines = <24>; }; };};
发现没有输出，我采用的是示波器直接看PCLK 波形的，是否还需要进行那些设置或者配置？或者在那些地方可以观测？
谢谢！
thoms
Shine：
回复 yuanjianhua yuanjianhua:
pinmux配置了么？
yuanjianhua yuanjianhua：
回复 Shine:
设置了，没有改动。
yongqing wang：
回复 yuanjianhua yuanjianhua:
uboot中有没有对其初始化
yuanjianhua yuanjianhua：
回复 yongqing wang:
您好，UBOOT中需要初始化哪些？有相应的参考文档吗？谢谢
yongqing wang：
回复 yuanjianhua yuanjianhua:
直接搜uboot LCD 初始化
