WhyCan Forum(哇酷开发者社区)

花了一点时间对Icenowy的patch和chong的patch进行了比较，结果发现chong的patch包基本上就是在Icenowy的基础上更改了下面的这个文件：

--- ../linux/drivers/clk/sunxi-ng/ccu-suniv.c    2019-01-15 22:48:18.824587965 +0800
+++ drivers/clk/sunxi-ng/ccu-suniv.c    2019-01-23 09:05:17.959348454 +0800
@@ -238,7 +238,7 @@
/* The BSP header file has a CIR_CFG, but no mod clock uses this definition */

static SUNXI_CCU_GATE(usb_phy0_clk,    "usb-phy0",    "osc24M",
-              0x0cc, BIT(8), 0);
+              0x0cc, BIT(1), 0);

static SUNXI_CCU_GATE(dram_ve_clk,    "dram-ve",    "pll-ddr",
              0x100, BIT(0), 0);

理论上将上面这个patch应用到Icenowy的4.14内核中，USB应该也就能跑了。

可以参考 https://blog.csdn.net/lan120576664/article/details/101081608 和  https://whycan.cn/t_2401.html#p18389 我照着这俩弄可以用

可以试一试，我记得貌似不行，估计是v3s端点不够

不用谢， 一起学习.

https://www.kernel.org/doc/Documentation/usb/gadget-testing.txt

  # mkdir functions/uvc.usb0/control/header/h
  # cd functions/uvc.usb0/control/
  # ln -s header/h class/fs
  # ln -s header/h class/ss
  # mkdir -p functions/uvc.usb0/streaming/uncompressed/u/360p
  # cat <<EOF > functions/uvc.usb0/streaming/uncompressed/u/360p/dwFrameInterval
  666666
  1000000
  5000000
  EOF
  # cd $GADGET_CONFIGFS_ROOT
  # mkdir functions/uvc.usb0/streaming/header/h
  # cd functions/uvc.usb0/streaming/header/h
  # ln -s ../../uncompressed/u
  # cd ../../class/fs
  # ln -s ../../header/h
  # cd ../../class/hs
  # ln -s ../../header/h
  # cd ../../class/ss
  # ln -s ../../header/h


Testing the UVC function
------------------------

device: run the gadget, modprobe vivid::

  # uvc-gadget -u /dev/video<uvc video node #> -v /dev/video<vivid video node #>

where uvc-gadget is this program:
	http://git.ideasonboard.org/uvc-gadget.git

with these patches:

	http://www.spinics.net/lists/linux-usb/msg99220.html

host::

	luvcview -f yuv

把板载摄像头转为USB摄像头.

https://github.com/torvalds/linux

源码在这里

这个作者用的是 The mainline linux kernel (4.21) has support for

刚刚试了一下:
git clone https://github.com/torvalds/linux --branch v4.21

结果提示分支错误, 后来想起来根本没有v4.21嘛, 最后一个版本是v4.20

所以你可以试一试:
git clone https://github.com/torvalds/linux --branch v5.0

root@me:/opt# git clone https://github.com/torvalds/linux --branch v5.0
Cloning into 'linux'...
remote: Enumerating objects: 7335096, done.
Receiving objects:   5% (417762/7335096), 186.67 MiB | 7.55 MiB/s