The TVP5150/1 decoders support different video input sources to their
AIP1A/B pins.

Possible configurations are as follows:
  - Analog Composite signal connected to AIP1A.
  - Analog Composite signal connected to AIP1B.
  - Analog S-Video Y (luminance) and C (chrominance)
    signals connected to AIP1A and AIP1B respectively.

This patch extends the device tree bindings documentation to describe
how the input connectors for these devices should be defined in a DT.

Signed-off-by: Marco Felsch <m.fel...@pengutronix.de>
Reviewed-by: Rob Herring <r...@kernel.org>
---
Changelog:

v7:
Hi Rob,
I droped your r b tag because I changed the bindings in this
patch version. Please can you have a look on it again?

- fix missing AIP1B svideo connection (description and examples)

v3:
- remove examples for one and two inputs
- replace space by tabs

v2:
- adapt port layout in accordance with
  https://www.spinics.net/lists/linux-media/msg138546.html with the
  svideo-connector deviation (use only one endpoint)

 .../devicetree/bindings/media/i2c/tvp5150.txt | 112 ++++++++++++++++--
 1 file changed, 105 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt 
b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
index 8c0fc1a26bf0..28b64ad149ef 100644
--- a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
+++ b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
@@ -12,11 +12,32 @@ Optional Properties:
 - pdn-gpios: phandle for the GPIO connected to the PDN pin, if any.
 - reset-gpios: phandle for the GPIO connected to the RESETB pin, if any.
 
-The device node must contain one 'port' child node for its digital output
-video port, in accordance with the video interface bindings defined in
-Documentation/devicetree/bindings/media/video-interfaces.txt.
+The device node must contain one 'port' child node per device physical input
+and output port, in accordance with the video interface bindings defined in
+Documentation/devicetree/bindings/media/video-interfaces.txt. The port nodes
+are numbered as follows
 
-Required Endpoint Properties for parallel synchronization:
+         Name          Type            Port
+       --------------------------------------
+         AIP1A         sink            0
+         AIP1B         sink            1
+         Y-OUT         src             2
+
+The device node must contain at least one sink port and the src port. Each 
input
+port must be linked to an endpoint defined in
+Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt. 
The
+port/connector layout is as follows
+
+tvp-5150 port@0 (AIP1A)
+       endpoint@0 -----------> Comp0-Con  port
+       endpoint@1 ------+----> Svideo-Con port
+tvp-5150 port@1 (AIP1B)  |
+       endpoint@1 ------+
+       endpoint@0 -----------> Comp1-Con  port
+tvp-5150 port@2
+       endpoint (video bitstream output at YOUT[0-7] parallel bus)
+
+Required Endpoint Properties for parallel synchronization on output port:
 
 - hsync-active: active state of the HSYNC signal. Must be <1> (HIGH).
 - vsync-active: active state of the VSYNC signal. Must be <1> (HIGH).
@@ -26,17 +47,94 @@ Required Endpoint Properties for parallel synchronization:
 If none of hsync-active, vsync-active and field-even-active is specified,
 the endpoint is assumed to use embedded BT.656 synchronization.
 
-Example:
+Example - three input sources:
+
+comp_connector_0 {
+       compatible = "composite-video-connector";
+       label = "Composite0";
+
+       port {
+               composite0_to_tvp5150: endpoint {
+                       remote-endpoint = <&tvp5150_to_composite0>;
+               };
+       };
+};
+
+comp_connector_1 {
+       compatible = "composite-video-connector";
+       label = "Composite1";
+
+       port {
+               composite1_to_tvp5150: endpoint {
+                       remote-endpoint = <&tvp5150_to_composite1>;
+               };
+       };
+};
+
+svideo_connector {
+       compatible = "svideo-connector";
+       label = "S-Video";
+
+       port {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               svideo_luma_to_tvp5150: endpoint@0 {
+                       reg = <0>;
+                       remote-endpoint = <&tvp5150_to_svideo_luma>;
+               };
+
+               svideo_chroma_to_tvp5150: endpoint@1 {
+                       reg = <1>;
+                       remote-endpoint = <&tvp5150_to_svideo_chroma>;
+               };
+       };
+};
 
 &i2c2 {
-       ...
        tvp5150@5c {
                compatible = "ti,tvp5150";
                reg = <0x5c>;
                pdn-gpios = <&gpio4 30 GPIO_ACTIVE_LOW>;
                reset-gpios = <&gpio6 7 GPIO_ACTIVE_LOW>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               port@0 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       reg = <0>;
+
+                       tvp5150_to_composite0: endpoint@0 {
+                               reg = <0>;
+                               remote-endpoint = <&composite0_to_tvp5150>;
+                       };
+
+                       tvp5150_to_svideo_luma: endpoint@1 {
+                               reg = <1>;
+                               remote-endpoint = <&svideo_luma_to_tvp5150>;
+                       };
+               };
+
+               port@1 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       reg = <1>;
+
+                       tvp5150_to_composite1: endpoint@0 {
+                               reg = <0>;
+                                remote-endpoint = <&composite1_to_tvp5150>;
+                       };
+
+                       tvp5150_to_svideo_chroma: endpoint@1 {
+                               reg = <1>;
+                               remote-endpoint = <&svideo_chroma_to_tvp5150>;
+                       };
+               };
+
+               port@2 {
+                       reg = <2>;
 
-               port {
                        tvp5150_1: endpoint {
                                remote-endpoint = <&ccdc_ep>;
                        };
-- 
2.20.1

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