Hi Maxime,
Thank you for the patch.
On Monday, 4 September 2017 16:03:34 EEST Maxime Ripard wrote:
> The Cadence MIPI-CSI2 RX controller is a CSI2RX bridge that supports up to
> 4 CSI-2 lanes, and can route the frames to up to 4 streams, depending on
> the hardware implementation.
>
> It can operate with an external D-PHY, an internal one or no D-PHY at all
> in some configurations.
>
> Acked-by: Rob Herring <r...@kernel.org>
> Acked-by: Benoit Parrot <bpar...@ti.com>
> Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com>
> ---
> .../devicetree/bindings/media/cdns-csi2rx.txt | 98 +++++++++++++++++++
> 1 file changed, 98 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/cdns-csi2rx.txt
>
> diff --git a/Documentation/devicetree/bindings/media/cdns-csi2rx.txt
> b/Documentation/devicetree/bindings/media/cdns-csi2rx.txt new file mode
> 100644
> index 000000000000..2395030d8c72
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/cdns-csi2rx.txt
> @@ -0,0 +1,98 @@
> +Cadence MIPI-CSI2 RX controller
> +===============================
> +
> +The Cadence MIPI-CSI2 RX controller is a CSI-2 bridge supporting up to 4
> CSI
> +lanes in input, and 4 different pixel streams in output.
> +
> +Required properties:
> + - compatible: must be set to "cdns,csi2rx" and an SoC-specific compatible
> + - reg: base address and size of the memory mapped region
> + - clocks: phandles to the clocks driving the controller
> + - clock-names: must contain:
> + * sys_clk: main clock
> + * p_clk: register bank clock
> + * pixel_if[0-3]_clk: pixel stream output clock, one for each stream
> + implemented in hardware, between 0 and 3
> +
> +Optional properties:
> + - phys: phandle to the external D-PHY, phy-names must be provided
> + - phy-names: must contain dphy, if the implementation uses an
> + external D-PHY
> +
> +Required subnodes:
> + - ports: A ports node with endpoint definitions as defined in
> + Documentation/devicetree/bindings/media/video-interfaces.txt.
> The
> + first port subnode should be the input endpoint, the next ones
> the
> + output, one for each stream supported by the CSI2-RX controller.
> + The ports ID must be the stream output number used in the
> + implementation, plus 1.
This sounds a bit unclear to me. How about the following ?
- ports: A ports node with one port child node per device input and output
port, in accordance with the video interface bindings defined in
Documentation/devicetree/bindings/media/video-interfaces.txt. The
port nodes numbered as follows.
Port Description
-----------------------------
0 CSI-2 input
1 Stream 0 output
2 Stream 1 output
3 Stream 2 output
4 Stream 3 output
The stream output port nodes are optional if they are not connected
to anything at the hardware level.
> +
> +Example:
> +
> +csi2rx: csi-bridge@0d060000 {
> + compatible = "cdns,csi2rx";
> + reg = <0x0d060000 0x1000>;
> + clocks = <&byteclock>, <&byteclock>
> + <&coreclock>, <&coreclock>,
> + <&coreclock>, <&coreclock>;
> + clock-names = "sys_clk", "p_clk",
> + "pixel_if0_clk", "pixel_if1_clk",
> + "pixel_if2_clk", "pixel_if3_clk";
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
Those two properties are not needed as the endpoint isn't numbered. Same for
all other ports below.
With this fixed and the ports node description clarified,
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> + reg = <0>;
> +
> + csi2rx_in_sensor: endpoint {
> + remote-endpoint = <&sensor_out_csi2rx>;
> + clock-lanes = <0>;
> + data-lanes = <1 2>;
> + };
> + };
> +
> + port@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> +
> + csi2rx_out_grabber0: endpoint {
> + remote-endpoint = <&grabber0_in_csi2rx>;
> + };
> + };
> +
> + port@2 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <2>;
> +
> + csi2rx_out_grabber1: endpoint {
> + remote-endpoint = <&grabber1_in_csi2rx>;
> + };
> + };
> +
> + port@3 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <3>;
> +
> + csi2rx_out_grabber2: endpoint {
> + remote-endpoint = <&grabber2_in_csi2rx>;
> + };
> + };
> +
> + port@4 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <4>;
> +
> + csi2rx_out_grabber3: endpoint {
> + remote-endpoint = <&grabber3_in_csi2rx>;
> + };
> + };
> + };
> +};
--
Regards,
Laurent Pinchart
