Capturing USB 5M Camera from USB 2.0 port

Moving this to the AM1X forum.

Hi

When i used the VGA webcam with usb 1.1 Host one it is detected the driver and i am able to capture the images.

The same camera i plugged to mini USB 2.0 (OTG) then it recognized the driver, but when i run my application it shows the below warning. 

[video4linux2,v4l2 @ 0xfa2470] The driver changed the time per frame from 1/25 to 1/30
uvcvideo: Failed to submit URB 0 (-90).
[video4linux2,v4l2 @ 0xfa2470] ioctl(VIDIOC_STREAMON): Message too long
/dev/video0: Message too long

why this is happening USB 1.1 and USB 2.0.

Please help me.

Thanks,

Francis 

Hi Lofna,

Lofna says said:

Please suggest the steps to configure the driver selection under Linux menuconfig. what are the gadgets need to include in Linux.

It seems to me, you are using both the USB ports ( USB 1.1 and OTG USB 2.0 ) as Host ports to detect USB devices, pendrives and USB webcams, then it must be simple.

For configuring the USB 2.0 as Host, in Linux Menuconfig, do the selection as below.

Device Drivers --->

    USB support --->
        <*> Support for Host-side USB
        --- Miscellaneous USB options
        [*] USB device class-devices
        --- USB Host Controller Drivers
        <*> Inventra Highspeed Dual Role Controller (TI, ADI, ...)
        --- Platform Glue Layer
        [*] DA8xx/OMAP-L1x
             <*>     MUSB DMA mode (TI CPPI4.1)  --->
             [ ]     Disable DMA (always use PIO)
 

Device Drivers ---> Multimedia support ---> Video capture adapters ---> V4L USB devices ---> <*> USB Video Class (UVC) [*] UVC input events device support  

Sound card support ---> Advanced Linux Sound Architecture ---> USB sound devices ---> <*> USB Audio/MIDI driver  

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

Please click the Verify Answer button on this post if it answers your question.
--------------------------------------------------------------------------------------------------------

Hi,

In my kernel tree this driver “MUSB DMA mode (TI CPPI4.1)” option is not available to my platform.

I have changed some code in under uvc drivers. When I run my Camera application the below error got it.

It has identified the external USB camera driver and created the node under /dev/video0. But there is no display and got the below error message.

usb 1-1: new high speed USB device using musb_hdrc and address 3

uvcvideo: Found UVC 1.00 device 5M Web Camera     (04f2:b355)

input: 5M Web Camera     as /devices/platform/musb_hdrc/usb1/1-1/1-1:1.0/input/input3

root@am180x-evm:/home# ./camera

frame width=272

frame height=480

uvcvideo: Failed to submit URB 0 (-90).

Start Capture: Message too long

VIDIOC_STREAMON: Message too long

Snapshot

Please suggest me.

Thanks,

Lofna

Hi Lofna,

So, it seems to me that the USB (UVC) driver works and it detects the USB camera.

Now it is the problem with capturing the image. Please check the type of resolution that the USB camera supports.

And also give it a try with other manufacturer's camera.

Regards,

Shankari

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

Please click the Verify Answer button on this post if it answers your question.
--------------------------------------------------------------------------------------------------------

Hi Shankari,

Thanks for your response.

I have tried with another Quick cam VGA web camera using USB 1.1 slot them I am able to capture the images.

But the same camera I want to plug to USB 2.0 slot and expecting the same result using my application, but

But my USB 2.0 slot is working with PenDrive concept.

it gives the sames below warning:

uvcvideo: Failed to submit URB 0 (-90).

Start Capture: Message too long

VIDIOC_STREAMON: Message too long

Please give any suggestions to modifying the uvc driver.

Thanks,

Lofna

Hi Shankari,

Any suggestions could you update on my issue.

Thanks,

Francis