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The Synopsys DesignWare MIPI CSI-2 Receiver is a CSI-2 bridge with one input port and one output port. It receives the data with the help of an external MIPI PHY (C-PHY or D-PHY) and passes it to e.g., the Rockchip Video Capture (VICAP) block on recent Rockchip SoCs. Add a V4L2 subdevice driver for this unit. Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Reviewed-by: Mehdi Djait <mehdi.djait@linux.intel.com> Signed-off-by: Michael Riesch <michael.riesch@collabora.com> [Sakari Ailus: Make sparse and smatch happy.] Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>