[PATCH/RFC v2] dt-bindings: display: bridge: sil,sii9022: Convert to json-schema

From: Geert Uytterhoeven
Date: Fri Dec 03 2021 - 09:14:16 EST

Convert the Silicon Image sii902x HDMI bridge Device Tree binding
documentation to json-schema.

Add missing sil,sii9022-cpi and sil,sii9022-tpi compatible values.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
RFC as I do not know the meaning of the various ports subnodes.

v2:
- Rework sil,i2s-data-lanes,
- Add schema reference to ports.
---
.../bindings/display/bridge/sii902x.txt | 78 ----------
.../bindings/display/bridge/sil,sii9022.yaml | 133 ++++++++++++++++++
2 files changed, 133 insertions(+), 78 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/display/bridge/sii902x.txt
create mode 100644 Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
deleted file mode 100644
index 3bc760cc31cbbeee..0000000000000000
--- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
+++ /dev/null
@@ -1,78 +0,0 @@
-sii902x HDMI bridge bindings
-
-Required properties:
- - compatible: "sil,sii9022"
- - reg: i2c address of the bridge
-
-Optional properties:
- - interrupts: describe the interrupt line used to inform the host
- about hotplug events.
- - reset-gpios: OF device-tree gpio specification for RST_N pin.
- - iovcc-supply: I/O Supply Voltage (1.8V or 3.3V)
- - cvcc12-supply: Digital Core Supply Voltage (1.2V)
-
- HDMI audio properties:
- - #sound-dai-cells: <0> or <1>. <0> if only i2s or spdif pin
- is wired, <1> if the both are wired. HDMI audio is
- configured only if this property is found.
- - sil,i2s-data-lanes: Array of up to 4 integers with values of 0-3
- Each integer indicates which i2s pin is connected to which
- audio fifo. The first integer selects i2s audio pin for the
- first audio fifo#0 (HDMI channels 1&2), second for fifo#1
- (HDMI channels 3&4), and so on. There is 4 fifos and 4 i2s
- pins (SD0 - SD3). Any i2s pin can be connected to any fifo,
- but there can be no gaps. E.g. an i2s pin must be mapped to
- fifo#0 and fifo#1 before mapping a channel to fifo#2. Default
- value is <0>, describing SD0 pin beiging routed to hdmi audio
- fifo #0.
- - clocks: phandle and clock specifier for each clock listed in
- the clock-names property
- - clock-names: "mclk"
- Describes SII902x MCLK input. MCLK can be used to produce
- HDMI audio CTS values. This property follows
- Documentation/devicetree/bindings/clock/clock-bindings.txt
- consumer binding.
-
- If HDMI audio is configured the sii902x device becomes an I2S
- and/or spdif audio codec component (e.g a digital audio sink),
- that can be used in configuring a full audio devices with
- simple-card or audio-graph-card binding. See their binding
- documents on how to describe the way the sii902x device is
- connected to the rest of the audio system:
- Documentation/devicetree/bindings/sound/simple-card.yaml
- Documentation/devicetree/bindings/sound/audio-graph-card.yaml
- Note: In case of the audio-graph-card binding the used port
- index should be 3.
-
-Optional subnodes:
- - video input: this subnode can contain a video input port node
- to connect the bridge to a display controller output (See this
- documentation [1]).
-
-[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
-
-Example:
- hdmi-bridge@39 {
- compatible = "sil,sii9022";
- reg = <0x39>;
- reset-gpios = <&pioA 1 0>;
- iovcc-supply = <&v3v3_hdmi>;
- cvcc12-supply = <&v1v2_hdmi>;
-
- #sound-dai-cells = <0>;
- sil,i2s-data-lanes = < 0 1 2 >;
- clocks = <&mclk>;
- clock-names = "mclk";
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
- bridge_in: endpoint {
- remote-endpoint = <&dc_out>;
- };
- };
- };
- };
diff --git a/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml b/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml
new file mode 100644
index 0000000000000000..b39537f4fe8694ef
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/sil,sii9022.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Silicon Image sii902x HDMI bridge
+
+maintainers:
+ - Boris Brezillon <bbrezillon@xxxxxxxxxx>
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - sil,sii9022-cpi
+ - sil,sii9022-tpi
+ - const: sil,sii9022
+ - const: sil,sii9022
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+ description: Interrupt line used to inform the host about hotplug events.
+
+ reset-gpios:
+ maxItems: 1
+
+ iovcc-supply:
+ description: I/O Supply Voltage (1.8V or 3.3V)
+
+ cvcc12-supply:
+ description: Digital Core Supply Voltage (1.2V)
+
+ '#sound-dai-cells':
+ enum: [ 0, 1 ]
+ description: |
+ <0> if only i2s or spdif pin is wired,
+ <1> if both are wired.
+ HDMI audio is configured only if this property is found.
+ If HDMI audio is configured the sii902x device becomes an I2S and/or
+ spdif audio codec component (e.g. a digital audio sink), that can be used
+ in configuring a full audio devices with simple-card or audio-graph-card
+ binding. See their binding documents on how to describe the way the
+ sii902x device is connected to the rest of the audio system:
+ Documentation/devicetree/bindings/sound/simple-card.yaml
+ Documentation/devicetree/bindings/sound/audio-graph-card.yaml
+ Note: In case of the audio-graph-card binding the used port index should
+ be 3.
+
+ sil,i2s-data-lanes:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 4
+ uniqueItems: true
+ items:
+ enum: [ 0, 1, 2, 3 ]
+ description:
+ Each integer indicates which i2s pin is connected to which audio fifo.
+ The first integer selects i2s audio pin for the first audio fifo#0 (HDMI
+ channels 1&2), second for fifo#1 (HDMI channels 3&4), and so on. There
+ are 4 fifos and 4 i2s pins (SD0 - SD3). Any i2s pin can be connected to
+ any fifo, but there can be no gaps. E.g. an i2s pin must be mapped to
+ fifo#0 and fifo#1 before mapping a channel to fifo#2. Default value is
+ <0>, describing SD0 pin being routed to hdmi audio fifo #0.
+
+ clocks:
+ maxItems: 1
+ description: MCLK input. MCLK can be used to produce HDMI audio CTS values.
+
+ clock-names:
+ const: mclk
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ type: object
+ description: FIXME
+
+ port@1:
+ type: object
+ description: FIXME
+
+ port@2:
+ type: object
+ description: FIXME
+
+ port@3:
+ type: object
+ description: FIXME
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ hdmi-bridge@39 {
+ compatible = "sil,sii9022";
+ reg = <0x39>;
+ reset-gpios = <&pioA 1 0>;
+ iovcc-supply = <&v3v3_hdmi>;
+ cvcc12-supply = <&v1v2_hdmi>;
+
+ #sound-dai-cells = <0>;
+ sil,i2s-data-lanes = < 0 1 2 >;
+ clocks = <&mclk>;
+ clock-names = "mclk";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ bridge_in: endpoint {
+ remote-endpoint = <&dc_out>;
+ };
+ };
+ };
+ };
+ };
--
2.25.1