Re: FT602 UVC error

Hi Parekkadan,

On Thu, Jul 29, 2021 at 02:57:16PM +0530, Parekkadam Sunny wrote:

Hi,

Antipating a quick support from your side. We are struggling a lot and it is a
critical aspect for our project.

Please note that we are offering community support in our spare time,
which is unfortunately a limited resource.

With Regards,
Shine Parekkadan Sunny
Scientist 'B'
CAIR,DRDO
CV Raman Nagar
Bangalore-560093
Email:shinepsunny@cair.drdo.in
Ph:080 25342646;Extn:4161
 
 

-- Original Message --
 
From: [shinepsunny@cair.drdo.in]
To: [linux-media@vger.kernel.org], [laurent.pinchart@ideasonboard.com]
Date: Wed 28 July 2021 [9:34:19 AM]
Subject: FT602 UVC error

 
 
Hi Team,

Extremely sorry for the initial wrong mail.
 
We are planned to use FT602 device(claiming to be uvc compliant but bulk
device) in our project for collecting camera sensors data and passing it to
Linux host via USB 3.0 with help of UVC driver(v4l2) in Linux.
 
For getting started with the device, we are using UMFT602A module(evaluation
kit) with cyclone V soc EVM using FT602_UVC_Bus_Master_Sample (AN_434) example
code, which was available in FT602 product page.  Host side we are using Ubuntu
20.04 with latest kernel version 5.13.0-051300-generic.
 
When we enable auxiliary interface in FT602 configuration programmer, we are
unable to receive any data in ubuntu, when We disable auxiliary interface, we
are able to receive frames in Wireshark and also in UVC debug trace, with frame
overflow error then we  have tried allocating constant bandwidth using  
modprobe uvcvideo quirks=640 using these settings we could eliminate frame
overflow error, but VLC media player failed to display color bar and also
unable to get any data from V4l2 frame capture API for 1920 x 1080 60fps yuv2,
for testing we have reduced video resolution and fps but it didn't help in
solving the problem. 
 
There was no problem seen in playing color bar video using VLC media player in
windows. In final application we need to use V4l2 capture API for collecting
frame data please help us in solving the issue.
 
I am attaching Wireshark capture file and Linux dmesg log with this mail.
Use any test editor for opening usblog1.log followed by usblog2.log...
ft602usbdebug.zip contains Wireshark capture.
 
Thanks
Shine
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-- 
Regards,

Laurent Pinchart