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Message-ID: <0af5607f13b95e1312a1e8df516c8f3d6d0b20f0.1699449537.git.mehdi.djait@bootlin.com>
Date: Wed, 8 Nov 2023 14:27:13 +0100
From: Mehdi Djait <mehdi.djait@...tlin.com>
To: mchehab@...nel.org, heiko@...ech.de, hverkuil-cisco@...all.nl,
laurent.pinchart@...asonboard.com,
krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
conor+dt@...nel.org
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
alexandre.belloni@...tlin.com, maxime.chevallier@...tlin.com,
paul.kocialkowski@...tlin.com,
Mehdi Djait <mehdi.djait@...tlin.com>
Subject: [PATCH v8 2/3] media: dt-bindings: media: i2c: Add bindings for TW9900
The Techwell TW9900 is a video decoder supporting multiple input
standards such as PAL and NTSC and has a parallel BT.656 output
interface.
It's designed to be low-power, posesses some features such as a
programmable comb-filter, and automatic input standard detection
Signed-off-by: Mehdi Djait <mehdi.djait@...tlin.com>
---
V7->V8:
- fixed the number of analog input ports: it is just one.
- added endpoints of the analog input port
- added vdd-supply to the required in the dt-binding documentation
V6->V7:
- added powerdown-gpios and input ports
- used 4 spaces for example identation
V5->V6:
- This commit had a "Reviewed-by: Rob Herring <robh@...nel.org>" Tag but
decided not to collect it because the last Iteration was more than 2
years ago
- removed SECAM from the mentioned standards
- changed maintainer
V4->V5:
- renamed the file to match the compatible string, and referenced
the graph.yaml schema
V3->V4:
- add the missing reset-gpios node to the binding
V2->V3:
- fix the example not compiling due to a typo in the reset-gpios
node.
.../bindings/media/i2c/techwell,tw9900.yaml | 137 ++++++++++++++++++
1 file changed, 137 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml
diff --git a/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml b/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml
new file mode 100644
index 000000000000..e37317f81072
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/techwell,tw9900.yaml
@@ -0,0 +1,137 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/techwell,tw9900.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Techwell TW9900 NTSC/PAL video decoder
+
+maintainers:
+ - Mehdi Djait <mehdi.djait@...tlin.com>
+
+description:
+ The tw9900 is a multi-standard video decoder, supporting NTSC, PAL standards
+ with auto-detection features.
+
+properties:
+ compatible:
+ const: techwell,tw9900
+
+ reg:
+ maxItems: 1
+
+ vdd-supply:
+ description: VDD power supply
+
+ reset-gpios:
+ description: GPIO descriptor for the RESET input pin
+ maxItems: 1
+
+ powerdown-gpios:
+ description: GPIO descriptor for the POWERDOWN input pin
+ maxItems: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ description: Analog input port
+
+ properties:
+ endpoint@0:
+ $ref: /schemas/graph.yaml#/properties/endpoint
+ description: CVBS over MUX0
+
+ endpoint@1:
+ $ref: /schemas/graph.yaml#/properties/endpoint
+ description: CVBS over MUX1
+
+ endpoint@2:
+ $ref: /schemas/graph.yaml#/properties/endpoint
+ description: Chroma over CIN0 and Y over MUX0
+
+ endpoint@3:
+ $ref: /schemas/graph.yaml#/properties/endpoint
+ description: Chroma over CIN0 and Y over MUX1
+
+ oneOf:
+ - required:
+ - endpoint@0
+ - required:
+ - endpoint@1
+ - required:
+ - endpoint@2
+ - required:
+ - endpoint@3
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Video port for the decoder output.
+
+
+ required:
+ - port@0
+ - port@1
+
+required:
+ - compatible
+ - ports
+ - reg
+ - vdd-supply
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/display/sdtv-standards.h>
+ #include <dt-bindings/gpio/gpio.h>
+
+ composite_connector {
+ compatible = "composite-video-connector";
+ label = "tv";
+ sdtv-standards = <(SDTV_STD_PAL | SDTV_STD_NTSC)>;
+
+ port {
+ composite_to_tw9900: endpoint {
+ remote-endpoint = <&tw9900_to_composite>;
+ };
+ };
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ video-decoder@44 {
+ compatible = "techwell,tw9900";
+ reg = <0x44>;
+
+ vdd-supply = <&tw9900_supply>;
+ reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reg = <0>;
+ tw9900_to_composite: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&composite_to_tw9900>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ endpoint {
+ remote-endpoint = <&cif_in>;
+ };
+ };
+ };
+ };
+ };
--
2.41.0
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