Re: [PATCH v4 06/15] dt-bindings: media: sun6i-a31-csi: Add MIPI CSI-2 input port

[Maxime Ripard <maxime@cerno.tech>]

On Thu, Dec 31, 2020 at 03:29:39PM +0100, Paul Kocialkowski wrote:
> The A31 CSI controller supports two distinct input interfaces:
> parallel and an external MIPI CSI-2 bridge. The parallel interface
> is often connected to a set of hardware pins while the MIPI CSI-2
> bridge is an internal FIFO-ish link. As a result, these two inputs
> are distinguished as two different ports.
> 
> Note that only one of the two may be present on a controller instance.
> For example, the V3s has one controller dedicated to MIPI-CSI2 and one
> dedicated to parallel.
> 
> Update the binding with an explicit ports node that holds two distinct
> port nodes: one for parallel input and one for MIPI CSI-2.
> 
> This is backward-compatible with the single-port approach that was
> previously taken for representing the parallel interface port, which
> stays enumerated as fwnode port 0.
> 
> Note that additional ports may be added in the future, especially to
> support feeding the CSI controller's output to the ISP.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> Reviewed-by: Rob Herring <robh@kernel.org>

Reviewed-by: Maxime Ripard <mripard@kernel.org>

Maxime