@顾真牛 uboot 和kernel 搜索edid.c 有个白名单把你的分辨率加进去 static const struct base_drm_display_mode resolution_white[]

@george 再增加一款13.3寸 1080P N133HCE-GP1

@顾真牛 可以抓下开机log和这个显示器的edid：
cat /sys/class/drm/card0-HDMI*/edid > /data/edid.bin

@顾真牛 正常标准30PIN EDP 接口的都可以用，这个是我笔记本拆下来的，不是买的。

@顾真牛 目前默认是性能模式，可以切换到普通模式，散热器版本也有更新。也可以加风扇。

@顾真牛 非标分辨率需要把EDID读出来，解析以后把参数加到内核里边就可以了。

@顾真牛 onedrive有CM5 TF卡的固件

@顾真牛 1080P的。

@haiting2022 如果需要通过命令行拨号方式上网，更新一下附件驱动。v5.10.11.zip

@haiting2022 参考下面文件先配置，默认5G会生成一个网卡节点。
Quectel_RG500U-CN&RM500U-CN_Linux_USB驱动_用户指导_V1.1.pdf

@spartan50416 Thank you very much for your support.

@spartan50416 Sorry, to clarify, the method of making our startup disk is the same as the raspberry pie, not the firmware. Of course, the main difference is in the kernel part. If you are interested in porting the raspberry pie file system to CP4, there is no problem. You can use the PWM interface to adjust the fan speed. Our DTS configuration already supports this. The 2X20 expansion port has multiple PWM interfaces.

@spartan50416 I think there is no problem implementing the functionality in the link. If you have any questions during the modification, you can post them in the community and we will respond in a timely manner. We believe that using our machine modifications can achieve better performance.

@spartan50416 As shown in the figure below, the CP4 can have a separate fan heat sink, with EMMC, TF-card, and USB interfaces stored. The USB 3.0 interface can expand SSDs or mechanical hard disks. The machine has independent on-off buttons, which can be customized by modifying software, or external keyboards can be extended through the ADC interface. Firmware upgrades are the same as raspberry pi. You can use the balena Etcher tool to create a startup disk, and the startup media can be a TF card, a USB flash drive, or an EMMC.

@tonyone0902 显示异常的时候，打印一下下面两个命令，结果发上来：
sudo cat /sys/kernel/debug/dri/0/summary
sudo cat /sys/kernel/debug/dw-hdmi0/status

@tonyone0902 数据格式的问题可能性比较大。

@xingzhan2012 声卡选到耳机输出

The CM5-evb board has two native eDP interfaces, designed according to the standard 30PIN eDP interface, and can directly drive an eDP LCD without any conversion. Interface integrated backlight control circuit. LCD backlight brightness adjustment can be achieved.

@allen 看看内核部分是否确认一些配置。自己加上更新一下。