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sonyan11

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Posts posted by sonyan11

  2. Posted · Edited by sonyan11

    Dear @tooz,

     

    I deeply appreciate for your support.

    We have confirmed that the impact is reduced when using 5GHz. When using 2.4GHz, is it possible to mitigate the impact through driver tweaks or similar measures? Or would hardware modifications (antenna positions) be necessary?
    Best regards，
     

  3. Posted

    Hello,

    I use Tinker 3S with latest Tinker OS.
    I connected a high-power USB 3 camera module (800 mA).
    At the same time, my Tinker board is periodically accessed over Wi-Fi by a web client (it runs a web server).

    When I cut the power to the Wi-Fi router, the USB camera capture suddenly starts failing in bursts. This is reproducible.
    If I disable Wi-Fi power saving mode (see attached code), the problem disappears. 

    echo "options 8822ce rtw_power_mgnt=0 rtw_ips_mode=0 rtw_lps_level=0 rtw_low_power=0" \ | sudo tee /etc/modprobe.d/8822ce.conf

     

    However, I would like to avoid disabling power saving mode if possible.

    What do you think is happening here?

  7. Posted

    @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.

  8. Posted

    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,

  9. Posted

    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,

  10. Posted

    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,

     

     

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