The changes here represent an intermediate step towards bringing the
driver within the V4L2 framework.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
No locking is required for normal operation of the driver, but locking
is needed to prevent an Oops during some hot-unplugging scenarios. The
BKL is replaced here by mutex locks together with traps to detect null
pointers following asynchronous device disconnection.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Sometimes at startup the video urbs consistently and persistently deliver
bad data, each video frame (not isoc frame) containing an excess of
precisely two bytes. A brute-force cure implemented here is to
repeatedly reinitialize the registers of the SAA7113H chip and the
STK1160 USB bridge until good behaviour is obtained.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In order to allow multiple EasyCAP dongles to operate simultaneously
without mutual interference all static variables have been eliminated
except for a persistent inventory of plugged-in dongles at module level.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The so-called bridger routine has proved unnecessary following general
improvements elsewhere. The explain_() functions were a convenience
during early development, but are unnecessary and inappropriate now.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Upsampling from 8000 Hz mono to 32000 Hz stereo improves audio/video
synchronization when userspace programs adopt default buffering. This
is an experimental feature.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
New members of struct easycap take the place of undesirable global variables.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
