The tvp5150 and tvp5151 decoders support different video input source
connections to their AIP1A and AIP1B pins. Either two Composite or a
S-Video input signals are supported.
The 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 binding documentation to describe
how the input connectors for these devices should be defined in a DT.
Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
---
Hello,
The DT binding assumes that there is a 1:1 map between physical connectors
and connections, so there will be a connector described in the DT for each
connection.
There is also the question about how the DT bindings will be extended to
support other attributes (color/position/group) using the properties API.
But I believe that can be done as a follow-up, once the properties API is
in mainline.
Best regards,
Javier
Changes in v2:
- Remove from the changelog a mention of devices that multiplex the
physical RCA connectors to be used for the S-Video Y and C signals
since it's a special case and it doesn't really work on the IGEPv2.
.../devicetree/bindings/media/i2c/tvp5150.txt | 59 ++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
index 8c0fc1a26bf0..df555650b0b4 100644
--- a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
+++ b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
@@ -26,8 +26,46 @@ 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.
+-Optional nodes:
+- connectors: The list of tvp5150 input connectors available on a given
+ board. The node should contain a child 'port' node for each connector.
+
+ The tvp5150 has support for three possible connectors: 2 Composite and
+ 1 S-video. The "reg" property is used to specify which input connector
+ is associated with each 'port', using the following possible values:
+
+ 0: Composite0
+ 1: Composite1
+ 2: S-Video
+
+ The ports should have an endpoint subnode that is linked to a connector
+ node defined in Documentation/devicetree/bindings/display/connector/.
+ The linked connector compatible string should match the connector type.
+
Example:
+composite0: connector@0 {
+ compatible = "composite-video-connector";
+ label = "Composite0";
+
+ port {
+ comp0_out: endpoint {
+ remote-endpoint = <&tvp5150_comp0_in>;
+ };
+ };
+};
+
+svideo: connector@1 {
+ compatible = "composite-video-connector";
+ label = "S-Video";
+
+ port {
+ svideo_out: endpoint {
+ remote-endpoint = <&tvp5150_svideo_in>;
+ };
+ };
+};
+
&i2c2 {
...
tvp5150@5c {
@@ -36,6 +74,27 @@ Example:
pdn-gpios = <&gpio4 30 GPIO_ACTIVE_LOW>;
reset-gpios = <&gpio6 7 GPIO_ACTIVE_LOW>;
+ connectors {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /* Composite0 input */
+ port@0 {
+ reg = <0>;
+ tvp5150_comp0_in: endpoint {
+ remote-endpoint = <&comp0_out>;
+ };
+ };
+
+ /* S-Video input */
+ port@2 {
+ reg = <2>;
+ tvp5150_svideo_in: endpoint {
+ remote-endpoint = <&svideo_out>;
+ };
+ };
+ };
+
port {
tvp5150_1: endpoint {
remote-endpoint = <&ccdc_ep>;
--
2.5.5
--
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