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Message-ID: <ZWdPxfiB7sEUEKdd@aptenodytes>
Date: Wed, 29 Nov 2023 15:50:45 +0100
From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To: Mehdi Djait <mehdi.djait@...tlin.com>
Cc: 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, 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, Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v9 2/3] media: dt-bindings: media: i2c: Add bindings for
TW9900
Hi,
On Fri 17 Nov 23, 16:42, Mehdi Djait wrote:
> 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
>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Mehdi Djait <mehdi.djait@...tlin.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cheers,
Paul
> ---
> .../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
>
--
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com
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