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Bug 2491 - (os2008_camera) cant run camera applications with v4l2
(os2008_camera)
: cant run camera applications with v4l2
Status: RESOLVED FIXED
Product: Core
Kernel
: 4.0
: N800 Linux
: Low major (vote)
: 5.0-alpha-pre1
Assigned To: unassigned
: linux-kernel-bugs
:
: community-diablo, patch
:
:
  Show dependency tree
 
Reported: 2007-12-04 22:42 UTC by Sven J.
Modified: 2009-10-22 07:56 UTC (History)
3 users (show)

See Also:

Attachments
modified camera example for os2008 (14.30 KB, text/x-csrc)
2007-12-04 22:43 UTC, Sven J. 		Details
modified example code for os2008 (2.10 KB, text/x-chdr)
2007-12-04 22:43 UTC, Sven J. 		Details
Makefile to build the camera example in chinook (1.62 KB, application/octet-stream)
2007-12-04 22:44 UTC, Sven J. 		Details
motion software's console output (2.39 KB, text/plain)
2007-12-04 22:45 UTC, Sven J. 		Details
Makefile to build the camera example in chinook (1.62 KB, text/plain)
2007-12-04 22:51 UTC, Sven J. 		Details
1/2 half there, fixed the camera example problem (14.34 KB, text/x-csrc)
2007-12-04 23:55 UTC, Sven J. 		Details
ARM: OMAP 2: Camera: Don't return -EIO in VIDIOC_DQBUF (1.82 KB, patch)
2007-12-11 11:30 UTC, Sakari Ailus 		Details
Show Obsolete (1) Add an attachment (proposed patch, testcase, etc.)


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Description Sven J. (reporter) 2007-12-04 22:42:28 UTC 
Hi!

Since i upgraded my N800 to OS2008 i can not run my camera based applications.
I tried with motion, vor v4l2 support, which did not work.

Then i tried to use the gstreamer stuff with the camera example.

The outcome of the example_camera code was this:
"Nokia-N800:/home/user# ./example_camera 
example_camera[1996]: GLIB ERROR ** default - GST error: v4l2src_calls.c(964):
gst_v4l2src_set_capture (): /test-camera/camera_src:
Tried to capture at 15/2 fps, but device returned 8/1 fps

aborting...
Aborted (core dumped)"

I will attach the files to this bug report. I hope someone can help getting
v4l2 /camera running again. Its a major problem for me (development project
with opencv).

regards, Sven
Comment 1 Sven J. (reporter) 2007-12-04 22:43:13 UTC 
Created an attachment (id=650) [details]
modified camera example for os2008
Comment 2 Sven J. (reporter) 2007-12-04 22:43:36 UTC 
Created an attachment (id=651) [details]
modified example code for os2008
Comment 3 Sven J. (reporter) 2007-12-04 22:44:06 UTC 
Created an attachment (id=652) [details]
Makefile to build the camera example in chinook
Comment 4 Sven J. (reporter) 2007-12-04 22:45:57 UTC 
Created an attachment (id=653) [details]
motion software's console output
Comment 5 Sven J. (reporter) 2007-12-04 22:51:32 UTC 
Created an attachment (id=654) [details]
Makefile to build the camera example in chinook
Comment 6 Sven J. (reporter) 2007-12-04 23:55:10 UTC 
Created an attachment (id=655) [details]
1/2 half there, fixed  the camera example problem

Added a framerate request:
"framerate", GST_TYPE_FRACTION, 25, 1,
Comment 7 Sven J. (reporter) 2007-12-04 23:56:53 UTC 
gstreamer example fixed with the framerate definition, but v4l2 still does not
work
Comment 8 Sakari Ailus nokia 2007-12-11 11:29:09 UTC 
I haven't run the test program, but after reading the logs I guess that this is
because VIDIOC_DQBUF returns -EIO if there's an error in the frame. The V4L2
spec allows this but it seems that a number of applications don't appreciate
it.

Could you try the attached kernel patch?
Comment 9 Sakari Ailus nokia 2007-12-11 11:30:18 UTC 
Created an attachment (id=661) [details]
ARM: OMAP 2: Camera: Don't return -EIO in VIDIOC_DQBUF
Comment 10 Andre Klapper maemo.org 2008-10-22 20:02:28 UTC 
Sven: Did you have a chance to test the patch provided by Sakari?

Sakari: Has your patch been committed already? If so, in which upstream kernel
revision (or Maemo software/kernel version)?
Comment 11 Sakari Ailus nokia 2008-10-28 15:48:45 UTC 
Ooops. The patch has been in linux-omap since Februrary or so. :) I don't know
about Maemo releases.
Comment 12 Andre Klapper maemo.org 2008-10-28 16:15:22 UTC 
Sakari:
Any git revision number or URL? Would make it easy to find out the upstream
kernel version and compare to kernel versions shipped in Maemo (and set the
Target Milestone here correctly).

Setting status to RESOLVED FIXED. Thanks for the feedback!
Comment 13 Lucas Maneos 2009-10-04 19:21:26 UTC 
The patch hasn't been applied to Diablo (kernel 2.6.21-200842), but it seems
present in Fremantle's drivers/media/video/omap34xxcam.c (since pre-alpha1 at
least).
Comment 14 Lucas Maneos 2009-10-22 07:56:42 UTC 
Marking patches of interest to Diablo (Maemo4) community updates, please excuse
the noise.
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