linux-kernel - Re: [PATCH v4 1/4] dt-bindings: arm: qcom,coresight-static-replicator: Add property for source filtering

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Message-ID: <76ce5d6d-a468-4f49-bc56-da6db2a4c9ba@quicinc.com>
Date: Sat, 26 Oct 2024 11:48:20 +0800
From: Tao Zhang <quic_taozha@...cinc.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
	<mike.leach@...aro.org>, James Clark <james.clark@....com>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan
	<leo.yan@...ux.dev>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v4 1/4] dt-bindings: arm:
 qcom,coresight-static-replicator: Add property for source filtering


On 10/24/2024 6:36 PM, Suzuki K Poulose wrote:
> On 24/10/2024 10:14, Suzuki K Poulose wrote:
>> On 24/10/2024 07:53, Tao Zhang wrote:
>>> The is some "magic" hard coded filtering in the replicators,
>>> which only passes through trace from a particular "source". Add
>>> a new property "filter-src" to label a phandle to the coresight
>>> trace source device matching the hard coded filtering for the port.
>>
>> As mentioned in here in v3 review :
>>
>> https://lkml.org/lkml/2024/8/21/597
>>
>> Please do not use "src", expand it to "source"
>
> Just to confirm, this is only for the "bindings" string, not for the 
> variables used in the patches.

Yes, it is only used as the "bindings" string.


Best,

Tao

>
> Suzuki
>
>
>>
>> Rest looks fine.
>>
>> Suzuki
>>
>>>
>>> Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
>>> ---
>>>   .../arm/arm,coresight-static-replicator.yaml  | 19 
>>> ++++++++++++++++++-
>>>   1 file changed, 18 insertions(+), 1 deletion(-)
>>>
>>> diff --git 
>>> a/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml 
>>> b/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml 
>>>
>>> index 1892a091ac35..0d258c79eb94 100644
>>> --- 
>>> a/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml
>>> +++ 
>>> b/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml
>>> @@ -45,7 +45,22 @@ properties:
>>>       patternProperties:
>>>         '^port@[01]$':
>>>           description: Output connections to CoreSight Trace bus
>>> -        $ref: /schemas/graph.yaml#/properties/port
>>> +        $ref: /schemas/graph.yaml#/$defs/port-base
>>> +        unevaluatedProperties: false
>>> +
>>> +        properties:
>>> +          endpoint:
>>> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
>>> +            unevaluatedProperties: false
>>> +
>>> +            properties:
>>> +              filter-src:
>>> +                $ref: /schemas/types.yaml#/definitions/phandle
>>> +                description:
>>> +                  phandle to the coresight trace source device 
>>> matching the
>>> +                  hard coded filtering for this port
>>> +
>>> +              remote-endpoint: true
>>>   required:
>>>     - compatible
>>> @@ -72,6 +87,7 @@ examples:
>>>                   reg = <0>;
>>>                   replicator_out_port0: endpoint {
>>>                       remote-endpoint = <&etb_in_port>;
>>> +                    filter-src = <&tpdm_video>;
>>>                   };
>>>               };
>>> @@ -79,6 +95,7 @@ examples:
>>>                   reg = <1>;
>>>                   replicator_out_port1: endpoint {
>>>                       remote-endpoint = <&tpiu_in_port>;
>>> +                    filter-src = <&tpdm_mdss>;
>>>                   };
>>>               };
>>>           };
>>
>