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Message-ID: <a2a8cd80-a614-e96f-90ab-a98c60527344@linaro.org>
Date: Sun, 27 Nov 2022 22:02:45 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Pin-yen Lin <treapking@...omium.org>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <robert.foss@...aro.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Daniel Scally <djrscally@...il.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Prashant Malani <pmalani@...omium.org>,
Benson Leung <bleung@...omium.org>,
Guenter Roeck <groeck@...omium.org>
Cc: Javier Martinez Canillas <javierm@...hat.com>,
Stephen Boyd <swboyd@...omium.org>,
dri-devel@...ts.freedesktop.org,
Hsin-Yi Wang <hsinyi@...omium.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
devicetree@...r.kernel.org, chrome-platform@...ts.linux.dev,
linux-acpi@...r.kernel.org, Marek Vasut <marex@...x.de>,
Xin Ji <xji@...logixsemi.com>, Lyude Paul <lyude@...hat.com>,
Nícolas F . R . A . Prado
<nfraprado@...labora.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
linux-kernel@...r.kernel.org, Allen Chen <allen.chen@....com.tw>
Subject: Re: [PATCH v6 6/7] dt/bindings: drm/bridge: it6505: Add mode-switch
support
On 24/11/2022 11:20, Pin-yen Lin wrote:
> ITE IT6505 can be used in systems to switch the DP traffic between
> two downstreams, which can be USB Type-C DisplayPort alternate mode
> lane or regular DisplayPort output ports.
>
> Update the binding to accommodate this usage by introducing a
> data-lanes and a mode-switch property on endpoints.
>
> Signed-off-by: Pin-yen Lin <treapking@...omium.org>
>
> ---
>
> Changes in v6:
> - Remove switches node and use endpoints and data-lanes property to
> describe the connections.
>
> .../bindings/display/bridge/ite,it6505.yaml | 94 ++++++++++++++++++-
> 1 file changed, 90 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> index 833d11b2303a..b4b9881c7759 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> @@ -52,9 +52,53 @@ properties:
> maxItems: 1
> description: extcon specifier for the Power Delivery
>
> - port:
> - $ref: /schemas/graph.yaml#/properties/port
> - description: A port node pointing to DPI host port node
> + data-lanes:
> + maxItems: 1
> + description: restrict the dp output data-lanes with value of 1-4
Hm, where is the definition of this type? For example it comes with
video-interfaces, which you did not reference here.
> +
> + max-pixel-clock-khz:
There is no such unit accepted:
https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/property-units.yaml
> + maxItems: 1
maxItems of what type? What is this?
> + description: restrict max pixel clock
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
This is incompatible change... how do you handle now ABI break?
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/$defs/port-base
Why changing the ref?
> + unevaluatedProperties: false
> + description: A port node pointing to DPI host port node
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port-base
> + description:
> + Video port for panel or connector.
> +
> + patternProperties:
> + "^endpoint@[01]$":
> + $ref: /schemas/media/video-interfaces.yaml#
> + type: object
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + maxItems: 1
> +
> + remote-endpoint: true
> +
> + data-lanes:
> + minItems: 1
> + uniqueItems: true
> + items:
> + - enum: [ 0, 1, 2, 3]
Same problem as your previouspatch.
> +
> + mode-switch:
> + type: boolean
> + description: Register this node as a Type-C mode switch or not.
> +
> + required:
> + - reg
> + - remote-endpoint
>
> required:
> - compatible
> @@ -62,7 +106,7 @@ required:
> - pwr18-supply
> - interrupts
> - reset-gpios
> - - extcon
> + - ports
>
> additionalProperties: false
>
> @@ -92,3 +136,45 @@ examples:
> };
> };
> };
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + &i2c3 {
> + clock-frequency = <100000>;
> +
> + it6505dptx: it6505dptx@5c {
Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
> + compatible = "ite,it6505";
> + interrupts = <8 IRQ_TYPE_LEVEL_LOW 8 0>;
> + reg = <0x5c>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&it6505_pins>;
> + ovdd-supply = <&mt6366_vsim2_reg>;
> + pwr18-supply = <&pp1800_dpbrdg_dx>;
> + reset-gpios = <&pio 177 0>;
> + hpd-gpios = <&pio 10 0>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + reg = <0>;
> + it6505_in: endpoint {
> + remote-endpoint = <&dpi_out>;
> + };
> + };
> + port@1 {
> + reg = <1>;
> + ite_typec0: endpoint@0 {
> + mode-switch;
> + data-lanes = <0 1>;
Does not look like you tested the bindings. Please run `make
dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).
Best regards,
Krzysztof
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