[PATCH v7 02/10] drm: bridge: samsung-dsim: Lookup OF-graph or Child node devices

[Marek Vasut]

On 10/5/22 17:13, Jagan Teki wrote:
> The child devices in MIPI DSI can be binding with OF-graph
> and also via child nodes.
> 
> The OF-graph interface represents the child devices via
> remote and associated endpoint numbers like
> 
> dsi {
>     compatible = "fsl,imx8mm-mipi-dsim";
> 
>     ports {
> 	port at 0 {
> 	     reg = <0>;
> 
> 	     dsi_in_lcdif: endpoint at 0 {
> 		  reg = <0>;
> 		  remote-endpoint = <&lcdif_out_dsi>;
> 	     };
> 	};
> 
> 	port at 1 {
> 	     reg = <1>;
> 
> 	     dsi_out_bridge: endpoint {
> 		  remote-endpoint = <&bridge_in_dsi>;
> 	     };
> 	};
> };
> 
> The child node interface represents the child devices via
> conventional child nodes on given DSI parent like
> 
> dsi {
>     compatible = "samsung,exynos5433-mipi-dsi";
> 
>     ports {
>          port at 0 {
>               reg = <0>;
> 
>               dsi_to_mic: endpoint {
>                    remote-endpoint = <&mic_to_dsi>;
>               };
>          };
>     };
> 
>     panel at 0 {
>          reg = <0>;
>     };
> };
> 
> As Samsung DSIM bridge is common DSI IP across all Exynos DSI
> and NXP i.MX8M host controllers, this patch adds support to
> lookup the child devices whether its bindings on the associated
> host represent OF-graph or child node interfaces.

This looks like a good candidate for common/helper code which can be 
reused by other similar drivers.