T113 Tina otg gadget uvc失败

[xucw15990192241]

参考了《Linux_USB_开发指南.pdf》，其中mass storage已经成功

log：

[   30.608897] rmmod_host_driver
[   30.608897]
[   30.615506] [ehci0-controller]: sunxi_usb_disable_ehci
[   30.621256] [sunxi-ehci0]: remove, pdev->name: 4101000.ehci0-controller, sunxi_ehci: 0xc0c6be88
[   30.630996] sunxi-ehci 4101000.ehci0-controller: remove, state 4
[   30.637701] usb usb3: USB disconnect, device number 1
[   30.644409] sunxi-ehci 4101000.ehci0-controller: USB bus 3 deregistered
[   30.652214] [ohci0-controller]: sunxi_usb_disable_ohci
[   30.657952] [sunxi-ohci0]: remove, pdev->name: 4101400.ohci0-controller, sunxi_ohci: 0xc0c6c118
[   30.667684] sunxi-ohci 4101400.ohci0-controller: remove, state 4
[   30.674437] usb usb4: USB disconnect, device number 1
[   30.681026] sunxi-ohci 4101400.ohci0-controller: USB bus 4 deregistered
[   32.528909] usb1-vbus: disabling
[   34.248882]
[   34.248882] insmod_device_driver
[   34.248882]
[   34.256049] sunxi_usb_udc 4100000.udc-controller: 4100000.udc-controller supply udc not found, using dummy regulator
[   34.427355] sunxi_set_cur_vol_work()489 WARN: get power supply failed
[   34.514007] android_work: sent uevent USB_STATE=CONNECTED
[   34.575763] configfs-gadget gadget: high-speed config #1: c
[   34.582056] android_work: sent uevent USB_STATE=CONFIGURED
[   37.024543] random: crng init done

然后再尝试uvc失败了，pc上没有识别：

log：

[  130.902109] configfs-gadget gadget: uvc: uvc_function_bind()
[  141.897361] rmmod_host_driver
[  141.897361]
[  141.903971] [ehci0-controller]: sunxi_usb_disable_ehci
[  141.909723] [sunxi-ehci0]: remove, pdev->name: 4101000.ehci0-controller, sunxi_ehci: 0xc0c6be88
[  141.919462] sunxi-ehci 4101000.ehci0-controller: remove, state 4
[  141.926168] usb usb3: USB disconnect, device number 1
[  141.932870] sunxi-ehci 4101000.ehci0-controller: USB bus 3 deregistered
[  141.940680] [ohci0-controller]: sunxi_usb_disable_ohci
[  141.946416] [sunxi-ohci0]: remove, pdev->name: 4101400.ohci0-controller, sunxi_ohci: 0xc0c6c118
[  141.956154] sunxi-ohci 4101400.ohci0-controller: remove, state 4
[  141.962907] usb usb4: USB disconnect, device number 1
[  141.969512] sunxi-ohci 4101400.ohci0-controller: USB bus 4 deregistered
[  145.537351]
[  145.537351] insmod_device_driver
[  145.537351]
[  145.544516] sunxi_usb_udc 4100000.udc-controller: 4100000.udc-controller supply udc not found, using dummy regulator
[  206.524188] random: crng init done

从mass storage改成uvc设备重启过，然后configfs也重新配置过了。log对比看起来uvc模式都没有建立连接，大佬帮忙看看问题可能在哪里？

[xucw15990192241]

是还需要在应用层运行什么程序吗？

[xucw15990192241]

configfs配置完成后，/dev/video2成功注册（gadget uvc设备），之后连接PC，运行了uvc-gadget之后PC端出现"UVC Camera"设备，，但PC端使用软件打开设备不能出图，同时linux出现报错，log：

root@TinaLinux:~# ./uvc-gadget -c /dev/video0 g1/functions/uvc.usb0
Device /dev/video0 opened: SKT-SL500C-125A: SKT-SL500C-125 (usb-sunxi-ehci-1.4).
Device /dev/video2 opened: sunxi_usb_udc (gadget).
[   24.861291] sunxi_set_cur_vol_work()489 WARN: get power supply failed
[   24.947920] android_work: sent uevent USB_STATE=CONNECTED
[   25.004974] configfs-gadget gadget: high-speed config #1: c
[   25.011196] configfs-gadget gadget: uvc: uvc_function_set_alt(0, 0)
[   25.018181] configfs-gadget gadget: uvc: reset UVC Control
[   25.024307] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0)
[   25.031356] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0)
[   25.038398] android_work: sent uevent USB_STATE=CONFIGURED
[   25.051649] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0)
bRequestType a1 bRequest 81 wValue 0200 wIndex 0000 wLength 0001
control request (req GET_CUR cs BRIGHTNESS)
bRequestType a1 bRequest 81 wValue 0200 wIndex 0000 wLength 0001
control request (req GET_CUR cs BRIGHTNESS)
bRequestType a1 bRequest 81 wValue 0200 wIndex 0000 wLength 0001
control request (req GET_CUR cs BRIGHTNESS)
[   26.225582] sunxi_vbus_det_work()3493 WARN: get power supply failed
[   26.232578] configfs-gadget gadget: uvc: uvc_function_disable()
[   26.239233] android_work: sent uevent USB_STATE=DISCONNECTED
[   32.525579] usb1-vbus: disabling
[  108.515566] sunxi_vbus_det_work()3493 WARN: get power supply failed
[  108.522566] android_work: did not send uevent (0 0 00000000)
[  111.330935] ERR: Operation not supported
[  111.335358] android_work: sent uevent USB_STATE=CONNECTED
[  111.341394] ERR: Operation not supported
[  111.345792] ERR: Operation not supported
[  111.350195] ERR: Operation not supported
[  111.354573] ERR: Operation not supported
[  111.358959] ERR: Operation not supported
[  111.363343] ERR: Operation not supported
[  111.367738] ERR: Operation not supported
[  111.377574] ERR: Operation not supported
[  111.382104] ERR: Operation not supported
[  115.495562] sunxi_vbus_det_work()3493 WARN: get power supply failed
[  115.502589] android_work: sent uevent USB_STATE=DISCONNECTED

不知道是不是常说的usb 端点不够导致的问题

[chengwei_peng]

应用端应该有个uvc的节点，然后将输出传递给PC，要不然PC给过来的信息都没有处理，表现为ERR: Operation not supported

[chhjnavy]

@xucw15990192241 请问你这个问题解决了吗？我也遇到这个问题了

[Flork]

你好，请问这个问题有解决方法了吗，我也遇到了这个问题，参考的也是《Linux_USB_开发指南》,用VLC打开之后报错

[Oliver_Aaron]

@xucw15990192241
可以参考这个脚本去枚举
run_otg