Hello Jacob,
Thank you for the patch.
On Wednesday, 6 December 2017 13:19:34 EET Jacob Chen wrote:
> From: Jacob Chen <jacob2.chen@xxxxxxxxxxxxxx>
>
> Add DT bindings documentation for Rockchip MIPI D-PHY RX
>
> Signed-off-by: Jacob Chen <jacob2.chen@xxxxxxxxxxxxxx>
> ---
> .../bindings/media/rockchip-mipi-dphy.txt | 71 +++++++++++++++++++
> 1 file changed, 71 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt
>
> diff --git a/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt
> b/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt new file
> mode 100644
> index 000000000000..cef9450db051
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt
> @@ -0,0 +1,71 @@
> +Rockchip SoC MIPI RX D-PHY
> +-------------------------------------------------------------
> +
> +Required properties:
> +
> +- compatible: value should be one of the following
> + "rockchip,rk3288-mipi-dphy";
> + "rockchip,rk3399-mipi-dphy";
> +- rockchip,grf: GRF regs.
> +- bus-width : maximum number of data lanes supported (SoC specific);
Bus width isn't a standard property, should this be rockchip,data-lanes or
rockchip,#data-lanes ?
> +- clocks : list of clock specifiers, corresponding to entries in
> + clock-names property;
> +- clock-names: required clock name.
> +
> +The device node should contain two 'port' child node, according to the
s/child node/child nodes/
> bindings
> +defined in Documentation/devicetree/bindings/media/video-interfaces.txt.
> +The first port should be connected to sensor nodes, and the second port
> should be
> +connected to isp node. The following are properties specific to those
> nodes.
> +
> +endpoint node
> +-------------
> +
> +- data-lanes : (required) an array specifying active physical MIPI-CSI2
> + data input lanes and their mapping to logical lanes; the
> + array's content is unused, only its length is meaningful;
I assume this means that the D-PHY can't reroute lanes. I would mention that
explicitly, and require that the data-lanes values start at one at are
consecutive instead of ignoring them.
> +Device node example
> +-------------------
> +
> + mipi_dphy_rx0: mipi-dphy-rx0 {
> + compatible = "rockchip,rk3399-mipi-dphy";
> + clocks = <&cru SCLK_MIPIDPHY_REF>,
> + <&cru SCLK_DPHY_RX0_CFG>,
> + <&cru PCLK_VIO_GRF>;
> + clock-names = "dphy-ref", "dphy-cfg", "grf";
> + power-domains = <&power RK3399_PD_VIO>;
> + bus-width = <4>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + mipi_in_wcam: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&wcam_out>;
> + data-lanes = <1 2>;
> + };
> + mipi_in_ucam: endpoint@1 {
> + reg = <1>;
> + remote-endpoint = <&ucam_out>;
> + data-lanes = <1>;
> + };
What do those two camera correspond to ? Can they be active at the same time,
or do they use the same data lanes ? If they use the same data lanes, how does
this work, is there a multiplexer on the board ?
> + };
> +
> + port@1 {
> + reg = <1>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + dphy_rx0_out: endpoint@0 {
> + reg = <0>;
> + remote-endpoint = <&isp0_mipi_in>;
> + };
> + };
> + };
> + };
> \ No newline at end of file
--
Regards,
Laurent Pinchart
