Bayer sources are read in groups of 2 lines (e.g. for a
BGGR flavor, the first row contains only B and G samples,
while the second row contains only G and R samples). They
need to be read as a whole.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
(cherry picked from commit bf64a75c5ae58ed575303f70b2ab9b2208ded339)
Signed-off-by: Anton Khirnov <anton@khirnov.net>