possible progress on XO-1 camera issues
dsd at laptop.org
Sat Dec 12 15:16:59 EST 2009
Jon Corbet's been working on the XO-1.5 camera driver for us, and while
doing so he found a V4L2 bug which is probably one of the reasons that
we're having problems with XO-1 camera on all post-8.2 builds.
The workaround is to build the sensor driver into the kernel, and the
camera driver as a module.
I've made the equivalent change for the kernel that has been built here:
Untested, just wanted to get the word out.
Note that you may have to load the camera driver (cafe_ccic) manually,
if it doesn't automatically get loaded.
Word is going round that on a SoaS build for XO (which uses something
close to OLPC's 2.6.30 kernel, I think), someone recently managed to
capture a photo from the command line.
If someone is up for a small task, it would be good to start changing
these "words going round" to some actual solid information. Anyone want
to head up these efforts and to start
At the very least it would be nice to have some solid documentation on
where the problem is (and isn't). Is it in ov7670, cafe_ccic, v4l2,
gstreamer, xf86-video-geode, or..? How can you tell? Does the above
kernel help? What's the exact command you can use on F12 SoasXO to take
a photo? What's the corresponding error if you do that on F11? etc.
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