• State
  • Locked Locked
  • Replies 5 replies
  • Subscribers 100 subscribers
  • Views 2452 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Problem with web camera (uvcvideo)

Andrei Pushkin
Intellectual 705 points
Other Parts Discussed in Thread: AM3517, AM3505

Hello. I need to use USB Web camera with TI AM3505 and TI AM3517 with usb3220 transiver . I
use kernel 2.6.37 from arago. I test it, its work but sometimes I have
problems, that other users see in other TI CPU:
http://thread.gmane.org/gmane.linux.ports.arm.omap/35912/focus=36095
Sometimes camera do not work after 10-15 min of working. This is dmesg
(when this bug is reproduced) (I do not disconnect web camera but
linux think so(?)):
[   53.696228] ehci-omap ehci-omap.0: remove, state 1
[   53.696258] usb usb1: USB disconnect, address 1
[   53.696350] usb 1-1: USB disconnect, address 2
[   53.696350] usb 1-1.4: USB disconnect, address 3
[   53.773498] ehci-omap ehci-omap.0: force halt; handshake fa064814
0000c000 00000000 -> -110
[   54.113677] ehci-omap ehci-omap.0: USB bus 1 deregistered
[   54.524505] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[   54.524658] ehci-omap.0 supply hsusb0 not found, using dummy regulator
[   55.532257] ehci-omap ehci-omap.0: OMAP-EHCI Host Controller
[   55.532318] ehci-omap ehci-omap.0: new USB bus registered, assigned
bus number 1
[   55.540313] ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
[   55.555725] ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
[   55.555877] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[   55.555877] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[   55.555908] usb usb1: Product: OMAP-EHCI Host Controller
[   55.555908] usb usb1: Manufacturer: Linux 2.6.37-svn1014 ehci_hcd
[   55.555938] usb usb1: SerialNumber: ehci-omap.0
And camera and other USB devices do not work until reboot.
I test it with various web cameras, with and without USB hub with
external power. This bug is exists.

  • 0
    TI__Genius 9460 points

    Andrei,

    Can you send the full log starting from boot?

    Ajay

  • 0 in reply to Ajay
    Intellectual 705 points

    Thank you for answer.

    This is dmesg: http://pastebin.com/XK0yLx6S

    Problem is reproduced around 290 sec of kernel work.

  • 0 in reply to Andrei Pushkin
    TI__Genius 9460 points

    Andrei,

    I can see a watchdog related activity just before the issue is seen. I also see "Failed to set UVC probe control" which is indicating that command sent to camera failed and the error number "-110" is connection timed out.

    --------------------------------------------------------------------------------------------------------

    1. [   15.799468] omap_device: omap_wdt.-1: new worst case activate latency 0: 30517
    2. [   15.805328] OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec
    3. [   15.805389] omap_device: omap_wdt.-1: new worst case deactivate latency 0: 30517
    4. [   16.848602] omap_device: omap_i2c.1: new worst case activate latency 0: 30517
    5. [  294.798797] uvcvideo: Failed to set UVC probe control : -110 (exp. 26).
    6. [  294.806335] ehci-omap ehci-omap.0: remove, state 1
    7. [  294.806396] usb usb1: USB disconnect, address 1
    8. [  294.806396] usb 1-1: USB disconnect, address 2
    9. [  294.806427] usb 1-1.3: USB disconnect, address 3

    -----------------------------------------------------------------------------------------------------------

    I don;t know why control command from your camera is timed out but this time out is firing a workqueue to restart controller which is added as a recovery workaround for a hardware known issue with high DSS activity. This is causing the disconnect and reconnect . Please try below change which disables this recovery workqueue,

    -------------------------------------------------------------------------------------------------

    diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
    index c816a61..2b6b8f3 100644
    --- a/drivers/usb/core/message.c
    +++ b/drivers/usb/core/message.c
    @@ -105,7 +105,7 @@ static int usb_internal_control_msg(struct usb_device *usb_dev,
                     * API usb_submit_urb() instead of usb_control_msg().
                     */
                    if (!strcmp(hcd->product_desc, "OMAP-EHCI Host Controller") &&
    -                               retv == -ETIMEDOUT && hcd->driver->recover_hcd)
    +                       0 && retv == -ETIMEDOUT && hcd->driver->recover_hcd)
                            queue_work(pm_wq, &hcd->ehci_omap_work);

                    return retv;
    -------------------------------------------------------------------------------------------------

    Ajay

  • 0 in reply to Ajay
    Intellectual 705 points

    Ajay, thank you for answer!

    >>I can see a watchdog related activity just before the issue is seen.

    First column is time. Watchdog activity just in system start and I think that its not connected with this problem.

     

    >>I don;t know why control command from your camera is timed out but this time out is firing a workqueue to restart controller which is added as a recovery workaround for a hardware known issue with high DSS activity. This is causing the disconnect and reconnect . Please try below change which disables this recovery workqueue,

    I apply this path. In rusult I see inifnity "uvcvideo: Failed to set UVC probe control : -110 (exp. 26)." after problem was reproduced. Full log: http://pastebin.com/rQr5e1FX . Problem is reproduced in ~80 sec.

  • 0 in reply to Ajay
    Intellectual 705 points

    Also some USB cameras cnat work without external USB hub. When I connected this camera I see:

    [   29.076477] hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?

    [   29.142944] ehci-omap ehci-omap.0: port 1 reset error -110

    [   29.148681] hub 1-0:1.0: hub_port_status failed (err = -32)

    [   29.361755] ehci-omap ehci-omap.0: port 1 reset error -110

    [   29.367523] hub 1-0:1.0: hub_port_status failed (err = -32)

    [   29.580505] ehci-omap ehci-omap.0: port 1 reset error -110

    [   29.586242] hub 1-0:1.0: hub_port_status failed (err = -32)

    [   29.799255] ehci-omap ehci-omap.0: port 1 reset error -110

    [   29.805023] hub 1-0:1.0: hub_port_status failed (err = -32)

    [   30.018249] ehci-omap ehci-omap.0: port 1 reset error -110

    [   30.023986] hub 1-0:1.0: hub_port_status failed (err = -32)

    [   30.029846] hub 1-0:1.0: Cannot enable port 1.  Maybe the USB cable is bad?

    [   30.037170] ehci-omap ehci-omap.0: port 1 cannot be enabled

    [   30.037170] ehci-omap ehci-omap.0: Maybe your device is not a high speed device?

    [   30.037200] ehci-omap ehci-omap.0: USB host (EHCI) controller does not support full speed or low speed device on it's root port.

    [   30.037200] ehci-omap ehci-omap.0: Please connect full/low speed device via a high speed hub.

    [   30.037231] hub 1-0:1.0: unable to enumerate USB device on port 1