Hans Verkuil wrote:
Hi all,
A long standing problem with ivtv (and v4l drivers in general) is that
sometimes i2c devices are misidentified. So the driver thinks that at a
certain i2c address a tuner is connected, when in reality it is a audio
muxer or whatever. The root cause was a problem in the i2c subsystem of
the kernel which made it very hard to tell the i2c subsystem what to
expect at which address.
A new way of handling the i2c bus was added in kernel 2.6.22. However,
in order to actually make use of this (and so finally fix this issue
once and for all) all i2c drivers that are used by ivtv had to be
converted first and only then could ivtv itself be changed. Since ivtv
uses some 15 different i2c devices (each board uses a subset of 1-4/5
devices) this was a substantial amount of work. And it's also a record:
no other driver has to support that many i2c devices.
I've finally converted all the i2c drivers (they are now part of the
v4l-dvb repository) and have finished converting ivtv itself. But
before I ask the v4l-dvb maintainer to pull my ivtv changes I want
people to test it first. If I've made a mistake here, then devices
suddenly won't work anymore, so it's rather important that I let people
test first. Especially for non-standard boards like Japanese variants
and other non-Hauppauge cards.
It is also important that I know I haven't broken support for older
pre-2.6.22 kernels, so if you have an older kernel then please still
test it!
Hmmm.
Won't compile on my debian etch stock kernel:
# make
creating symbolic links...
Kernel build directory is /lib/modules/2.6.18-5-k7/build
make -C /lib/modules/2.6.18-5-k7/build SUBDIRS=/usr/src/ivtv/ivtv-i2c-7b56d82d91
bb/v4l modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.18-5-k7'
CC [M] /usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.o
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:126: error: unknown field
'dev_attrs' specified in initializer
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:126: warning: initialization
from incompatible pointer type
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:127: error: unknown field
'dev_release' specified in initializer
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:127: warning: missing braces
around initializer
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:127: warning: (near
initialization for 'video_class.subsys')
/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.c:127: warning: initialization
from incompatible pointer type
make[2]: *** [/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l/videodev.o] Error 1
make[1]: *** [_module_/usr/src/ivtv/ivtv-i2c-7b56d82d91bb/v4l] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.18-5-k7'
make: *** [default] Error 2
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