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The old ones didn't know the block size, so couldn't deduce the block type version. With upcoming new features, eg. HDR, we need to know the block type version in order to know what we can extract from it. This new function should now be used by all drivers, the old ones shall be phased out. That commit should be backported to 25.0 and 25.1 releases, so drivers can remain compatible with all existing release lines. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>