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SubjectRe: [PATCH v8 2/3] dt-bindings: Add binding for IT6505.
On Mon, Mar 23, 2020 at 01:21:53PM +0800, allen wrote:
> Add a DT binding documentation for IT6505.
>
> Acked-by: Sam Ravnborg <sam@ravnborg.org>
> Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
> Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
> ---
> cros-ec does not have an associated driver that uses the standard Linux USB-C driver class.
> extcon is used to model the Type-C connector.(crbug.com/982932)

That's nice, but doesn't matter for upstream. And sounds like a driver
problem, not a binding issue.

> ---
> .../bindings/display/bridge/ite,it6505.yaml | 91 ++++++++++++++++++++++
> 1 file changed, 91 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> new file mode 100644
> index 00000000..13feeef
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/ite,it6505.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ITE it6505 Device Tree Bindings
> +
> +maintainers:
> + - Allen Chen <allen.chen@ite.com.tw>
> +
> +description: |
> + The IT6505 is a high-performance DisplayPort 1.1a transmitter,
> + fully compliant with DisplayPort 1.1a, HDCP 1.3 specifications.
> + The IT6505 supports color depth of up to 36 bits (12 bits/color)
> + and ensures robust transmission of high-quality uncompressed video
> + content, along with uncompressed and compressed digital audio content.
> +
> + Aside from the various video output formats supported, the IT6505
> + also encodes and transmits up to 8 channels of I2S digital audio,
> + with sampling rate up to 192kHz and sample size up to 24 bits.
> + In addition, an S/PDIF input port takes in compressed audio of up to
> + 192kHz frame rate.
> +
> + Each IT6505 chip comes preprogrammed with an unique HDCP key,
> + in compliance with the HDCP 1.3 standard so as to provide secure
> + transmission of high-definition content. Users of the IT6505 need not
> + purchase any HDCP keys or ROMs.
> +
> +properties:
> + compatible:
> + const: ite,it6505
> +
> + ovdd-supply:
> + maxItems: 1
> + description: I/O voltage
> +
> + pwr18-supply:
> + maxItems: 1
> + description: core voltage
> +
> + interrupts:
> + maxItems: 1
> + description: interrupt specifier of INT pin
> +
> + reset-gpios:
> + maxItems: 1
> + description: gpio specifier of RESET pin
> +
> + extcon:

Think I said this already, but don't use extcon and define an output
port to a DP or USB connector.

> + maxItems: 1
> + description: extcon specifier for the Power Delivery
> +
> + port:
> + type: object
> + description: A port node pointing to DPI host port node
> +
> +required:
> + - compatible
> + - ovdd-supply
> + - pwr18-supply
> + - interrupts
> + - reset-gpios
> + - extcon
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + i2c3 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + dp-bridge@5c {
> + compatible = "ite,it6505";
> + interrupts = <152 IRQ_TYPE_EDGE_FALLING 152 0>;
> + reg = <0x5c>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&it6505_pins>;
> + ovdd-supply = <&mt6358_vsim1_reg>;
> + pwr18-supply = <&it6505_pp18_reg>;
> + reset-gpios = <&pio 179 1>;
> + extcon = <&usbc_extcon>;
> +
> + port {
> + it6505_in: endpoint {
> + remote-endpoint = <&dpi_out>;
> + };
> + };
> + };
> + };
> --
> 1.9.1
>

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