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The CAC block implements chromatic aberration correction. Expose it to userspace using the extensible parameters format. This was tested on the i.MX8MP platform, but based on available documentation it is also present in the RK3399 variant (V10). Thus presumably also in later versions, so no feature flag is introduced. Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Link: https://patch.msgid.link/20260511150957.581049-1-barnabas.pocze@ideasonboard.com Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>