@george One strong reason for considering this is that EU requires, or will require, all laptops sold new here to support powering from USB-C. (It is an effort to reduce the number of incompatible power connectors and associated waste and headache for consumers).

@george 谢谢啦

@george 可以了，刷好机能进入系统了，谢谢哈

@大法师 新建 文本文档 (3).txt 提示这个，也不知道操作的对不对，刚刚是把quiet这个删除了

@george 多谢多谢！！！

@george said in Laptop USB-C Alt Mode:

@anernest
Refer to the following document to provide EDID information and demesg information for inserting and removing HDMI.
https://www.cool-pi.com/topic/296/how-to-drive-non-standard-resolution-hdmi-displays?_=1701475254750

When I plug a desktop monitor in, the edid.bin file is empty and the monitor continues to act as if it has not been plugged in. So I plugged the portable monitor in, and the edid.bin remained empty, even though the monitor woke up and displayed the desktop. Below is the dmesg output from the time I plugged the portable monitor in (I imagine the same i2c read error would be happening with the desktop monitor): [55894.022488] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_disable] Crtc atomic disable vp0 [55922.073783] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.099121] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.124563] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.150090] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.175693] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.181007] dwhdmi-rockchip fde80000.hdmi: failed to get edid [55922.201317] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.226965] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.252690] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.278239] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.303637] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.308948] dwhdmi-rockchip fde80000.hdmi: failed to get edid [55922.390272] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55922.390290] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] Update mode to 1920x1080p60, type: 11(if:800) for vp0 dclk: 148500000 [55922.390313] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] dclk_out0 div: 0 dclk_core0 div: 2 [55922.390317] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_enable] set dclk_vop0 to 148500000, get 148500000 [55922.407006] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx_ropll_cmn_config bus_width:16a8c8 rate:1485000 [55922.407270] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy pll locked! [55922.414228] dwhdmi-rockchip fde80000.hdmi: final tmdsclk = 148500000 [55922.414247] dwhdmi-rockchip fde80000.hdmi: don't use dsc mode [55922.414249] dwhdmi-rockchip fde80000.hdmi: dw hdmi qp use tmds mode [55922.414253] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: bus_width:0x16a8c8,bit_rate:1485000 [55922.414438] rockchip-hdptx-phy-hdmi fed60000.hdmiphy: hdptx phy lane locked! [55922.467217] usb 5-1: new full-speed USB device number 4 using xhci-hcd [55922.507150] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55922.561497] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.586994] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.608497] usb 5-1: New USB device found, idVendor=1a86, idProduct=e5e3, bcdDevice= 0.00 [55922.608504] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [55922.608507] usb 5-1: Product: TeNizo_R7Series_TC [55922.608510] usb 5-1: Manufacturer: TeNizo [55922.612274] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.622167] input: TeNizo TeNizo_R7Series_TC as /devices/platform/usbdrd3_1/fc400000.usb/xhci-hcd.4.auto/usb5/5-1/5-1:1.0/0003:1A86:E5E3.0008/input/input14 [55922.622551] hid-multitouch 0003:1A86:E5E3.0008: input,hidraw4: USB HID v1.00 Device [TeNizo TeNizo_R7Series_TC] on usb-xhci-hcd.4.auto-1/input0 [55922.637682] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.663245] dwhdmi-rockchip fde80000.hdmi: i2c read err! [55922.668566] dwhdmi-rockchip fde80000.hdmi: failed to get edid [55924.770530] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55924.787232] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55924.803857] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55955.039625] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55955.293468] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_disable] Crtc atomic disable vp2 [55955.322826] dwhdmi-rockchip fde80000.hdmi: use tmds mode [55955.373026] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_disable] Crtc atomic disable vp0 [55955.423668] rockchip-vop2 fdd90000.vop: [drm:vop2_wait_power_domain_off] *ERROR* wait pd7 off timeout power_ctrl: 0x7f [55955.440413] rockchip-vop2 fdd90000.vop: [drm:vop2_crtc_atomic_disable] *ERROR* unexpected power on pd7 [55955.449779] dwhdmi-rockchip fde80000.hdmi: use tmds mode

@george 好的，我看看

@george got it, thanks! Looking forward for proper wiring solution. Meanwhile, I'll try to put together some custom wiring.

@Xelef2000
7e57ff02-b5e0-4faf-b8aa-5ac08e95e6f8-image.png
MIPI-LVDS-TC358775.pdf
TC358775.DSN

👍 👍 👍 👍

BuildRoot 也要跟上呀

@george 好的

@Albert
默认密码组合列表

coolpi/coolpi coolpi/123 ubuntu/coolpi

好的啊👍

@george 好的，谢谢啦

@george Thank you. This is very helpful.

@Albert
问题1：uboot是否开源并且支持修改调试? github上有uboot源码，支持修改调试。https://github.com/orgs/yanyitech/repositories
问题2：设备树dts是否开源，比如我可以挂载一个slave到i2c控制器上，我可以在设备树上添加； 内核代码也是开源的，支持修改。

问题3：CM5原厂有没有维护一个linux kernel版本，如果有的话，是否提供；Github上面有

问题4：想使用nfs挂载根文件系统，有没有相关的文档教程之类的；这个自行网络搜索解决。

@Albert 可以的。

@george 哦，那就不用交叉了哈，谢谢啦！