Re: [PATCH 0/2] Add VSP1 devices to DT for r8a7790 and r8a7791

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Devendra,

On Friday 19 December 2014 05:05:22 Devendra Talegaonkar wrote:
> Hi,
> Thanks for the reply. I could successfully stream file data to display via
> media link. Now on Lager board, I am trying to stream live video data
> captured from camera ( VIN1 input via ADV7180 decoder, RGB565 )  to
> display. I am using yavta to capture data from camera and streaming it to
> rpf.0. But I am not able to see data on VGA. I am using following commands
> to establish media link ./vsp1.sh media1 m2d ARGB565 ARGB32
> Then yavta to capture and stream data with following command:
> "./yavta -c -n 4 -f RGB565 -s 400x200 /dev/video1 /dev/video10" ( video10
> being associated dev for rpf.0) modetest command as follows:
> "./modetest -M rcar-du -s 17@11:1024x768@AR24 -d -P '11@32:1024x768@XR24"
> 
> Am I missing something or doing something wrong?

Yes. Or actually yavta is missing something :-) yavta is able to capture from 
a video node to file, or output the contents of a file to a video node, but 
doesn't have the ability to capture from one video node and feed the frames to 
another video node.

That would be an interesting addition to yavta though as it would allow 
exercising the dmabuf code paths, but I wonder whether it would really fit in 
yavta's original purpose as a low-level V4L2 test tool.

Sakari, you're somehow familiar with the code base, what would you think ?

-- 
Regards,

Laurent Pinchart