[v7,08/12] ARM: dts: sun8i: a33: Add endpoint@0 to dsi_in_tcon0

Commit Message

Jagan Teki March 29, 2023, 1:16 p.m. UTC

The DSI downstream devices are likely to be Panel, Bridge and
I2C-Configured Bridge.

It is possible to connect all three devices using upstream OF-graph port
or ports node however only Panel and Bridge are possible to connect via
child node but not possible to connect I2C-Configured Bridge via child
node since I2C-Configure bridges are child of I2C not upstream DSI hosts
and it must represent them via port or ports with endpoint linking.

Allwinner R33 DSI node already has a port so add endpoint 0 for input
tcon so that the downstream DSI devices can use endpoint 1 to connect
Panel or Bridge or I2C-Configured Bridge.

An example of the I2C-Configured downstream bridge representation is,

i2c1 {
       bridge@1b {
	     compatible = "ti,dlpc3433";

             ports {
                  port@0 {
                         reg = <0>;

                         bridge_in_dsi: endpoint {
                                remote-endpoint = <&dsi_out_bridge>;
                                data-lanes = <1 2 3 4>;
                         };
                  };

	          port@2 {
	                 reg = <2>;

                         bridge_out_dmd: endpoint {
                                remote-endpoint = <&dmd_out_bridge>;
                         };
                  };
             };
       };
};

dsi {
       compatible = "allwinner,sun6i-a31-mipi-dsi";

       port {
             dsi_in_tcon0: endpoint@0 {
	          reg = <0>;
		  remote-endpoint = <tcon0_out_dsi>;
	     };

	     dsi_out_bridge: endpoint@1 {
	   	  reg = <1>;
		  remote-endpoint = <&bridge_in_dsi>;
	     };
	};
};

Note that existing device bindings are untouched and still represent
the downstream devices via child nodes since the sun6i-mipi-dsi host
will migrate to a standardized single helper to lookup for a
downstream device via child or OF-graph port or port node.

Signed-off-by: Jagan Teki <[e-mail]>
---
Changes for v7:
- new patch

 arch/arm/boot/dts/sun8i-a33.dtsi | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
index b3d1bdfb5118..50c2424ec31e 100644
--- a/arch/arm/boot/dts/sun8i-a33.dtsi
+++ b/arch/arm/boot/dts/sun8i-a33.dtsi
@@ -269,7 +269,11 @@  dsi: dsi@1ca0000 {
 			#size-cells = <0>;
 
 			port {
-				dsi_in_tcon0: endpoint {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				dsi_in_tcon0: endpoint@0 {
+					reg = <0>;
 					remote-endpoint = <&tcon0_out_dsi>;
 				};
 			};