Re: [PATCH v9 07/18] drm: bridge: samsung-dsim: Lookup OF-graph or Child node devices

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On 12/9/22 16:23, 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@0 {
	     reg = <0>;

	     dsi_in_lcdif: endpoint@0 {
		  reg = <0>;
		  remote-endpoint = <&lcdif_out_dsi>;
	     };
	};

	port@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@0 {
              reg = <0>;

              dsi_to_mic: endpoint {
                   remote-endpoint = <&mic_to_dsi>;
              };
         };
    };

    panel@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.

v9, v8, v7, v6, v5, v4, v3:
* none

v2:
* new patch

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



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