linux-kernel - Re: [PATCH v8 2/5] dt-bindings: msm/dp: add data-lanes and link-frequencies property

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Date:   Tue, 06 Dec 2022 00:34:10 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...ux.ie,
        agross@...nel.org, andersson@...nel.org,
        konrad.dybcio@...ainline.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        airlied@...il.com
CC:     quic_abhinavk@...cinc.com, quic_sbillaka@...cinc.com,
        freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/5] dt-bindings: msm/dp: add data-lanes and link-frequencies property



On 5 December 2022 22:14:27 GMT+03:00, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>Add both data-lanes and link-frequencies property into endpoint
>
>Changes in v7:
>-- split yaml out of dtsi patch
>-- link-frequencies from link rate to symbol rate
>-- deprecation of old data-lanes property
>
>Changes in v8:
>-- correct Bjorn mail address to kernel.org
>
>Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>---
> .../bindings/display/msm/dp-controller.yaml        | 22 ++++++++++++++++------
> 1 file changed, 16 insertions(+), 6 deletions(-)
>
>diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>index f2515af..13d2c3c 100644
>--- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>+++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml
>@@ -79,12 +79,6 @@ properties:
>   aux-bus:
>     $ref: /schemas/display/dp-aux-bus.yaml#
> 
>-  data-lanes:
>-    $ref: /schemas/types.yaml#/definitions/uint32-array
>-    minItems: 1
>-    maxItems: 4
>-    items:
>-      maximum: 3

These properties can still be used, e.g. Bjorn is submitting patches with the old property. I think this should be marked with deprecated: true instead of removal.

> 
>   "#sound-dai-cells":
>     const: 0
>@@ -105,6 +99,19 @@ properties:
>         $ref: /schemas/graph.yaml#/properties/port
>         description: Output endpoint of the controller
> 
>+        properties:
>+          endpoint:
>+            $ref: /schemas/media/video-interfaces.yaml#
>+
>+          properties:
>+            data-lanes:
>+              $ref: /schemas/types.yaml#/definitions/uint32-array
>+
>+            link-frequencies:
>+              $ref: /schemas/types.yaml#/definitions/uint64-array
>+
>+          additionalProperties: false
>+
> required:
>   - compatible
>   - reg
>@@ -193,6 +200,9 @@ examples:
>                 reg = <1>;
>                 endpoint {
>                     remote-endpoint = <&typec>;
>+                    data-lanes = <1 2>;
>+                    link-frequencies = /bits/ 64 <1620000000 2700000000
>+                                                  5400000000 8100000000>;
>                 };
>             };
>         };

-- 
With best wishes
Dmitry