Hi Dave,
2012/2/25 Dave Hylands <dhylands@xxxxxxxxx>:
>
> I'm not all that familiar with v4l, but based on what you've posted,
> you need to populate the read routine in your v4l2_fops structure to
> support read.
>
My bad! You are totally right: I forgot about my webcam.
When I did:
$ cat /dev/video0
I was actually getting data from my webcam (which supports read),
and not from the easycap device, which is /dev/video1.
So, everything makes sense now:
$ cat /dev/video1
...
open("/dev/video1", O_RDONLY|O_LARGEFILE) = 3
...
read(3, 0x8835000, 32768) = -1 EINVAL (Invalid argument)
This is clearly shown by the piece of code mentioned before.
Thanks and sorry for the noise,
Ezequiel.
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