Control USB 3.0 VBus by software.

[Control USB 3.0 VBus by software.]

Dear @tooz

Thank you so much, I have updated kenel and have successfully control the vbus.

I am super happy to get this result. I deeply appreciate your contribution to this forum.

Best regards,

 

[Control USB 3.0 VBus by software.]

@tooz

Hello. I followed your instruction about usb-c.

I use "linux4.4 debian10".

echo on > /sys/kernel/debug/fe800000.dwc3/vbus
echo off > /sys/kernel/debug/fe800000.dwc3/vbus

The result is 

-bash: /sys/kernel/debug/fe800000.dwc3/vbus: Permission denied

I cannot find vbus as follows.

~# ls /sys/kernel/debug/fe800000.dwc3/
ep0in   ep1in   ep2in   ep3in   ep4in   ep5in   ep6in       mode     testmode
ep0out  ep1out  ep2out  ep3out  ep4out  ep5out  link_state  regdump

I would be grateful if you could help me.

[Change compiled UVC to module]

Dear @tooz,

Thank you very much for your comment.

I apologize for not presenting my environment first.  I use Kernel 4.4.

I have done the followings and still the UVC is not recognized as a module.

1. Installing the build tools

$ sudo apt-get install git-core gitk git-gui gcc-arm-linux-gnueabihf device-tree-compiler gcc-aarch64-linux-gnu mtools parted libssl-dev

2. Build Kernel

$ cd [source code]
$ make ARCH=arm64 tinker2_defconfig
$ make menuconfig

Modify USB Video Class to module.

Device Drivers> Multimedia Support > Media USB Adapters > USB Video Class [*] → [M]

$ make ARCH=arm64 rk3399-tinker_board_2.img CROSS_COMPILE=aarch64-linux-gnu- -j8

3. Install Kernel

$ sudo dd if=boot.img of=/dev/mmcblk1p4 status=progress && sync
$ sudo reboot

Please let me know if I am missing a process that we need.

Best regards,

[Change compiled UVC to module]

Hello. I use tinker board 2S.

Previously, I received following advice about UVC Cam.

Quote

uvcvideo is compiled into the kernel, tasks that are module-related cannot be supported as uvcvideo by default is not part of the module.

 

 

Now I tried to change uvc cam setting to module by following https://github.com/TinkerBoard/TinkerBoard/wiki/Developer-Guide.

However, I cannot find uvc related topic at

 make menuconfig

Please tell me the correct way to change .config in order to compiled uvcvideo driver to module.

 

Best regards,

[Change quirks of uvcviceo]

Hello, I use Tinker board 2S. 

OS: Tinker Board 2 Debian 10 V2.1.6

 

I would like to change quirks of uvcvideo driver.

I tried:

sudo modinfo uvcvideo

and got:

modinfo: ERROR: Module uvcvideo not found.

 

I also tried

sudo modprobe uvcvideo quirks=0x80

,but cannot find any changes in /sys/module/uvcvideo/parameters/quirks. It looks like it's not working properly.

Anyone know how to deal with this? Unfortunately, I do not have much experience in Linux Kernel, please let me know if my question is completely out of scope.

 

Best regards,