[PATCH v3 1/3] dt-bindings: arm: qcom,coresight-static-replicator: Add property for source filtering

[Krzysztof Kozlowski]

On Wed, Aug 21, 2024 at 11:38:55AM +0100, Suzuki K Poulose wrote:
> On 21/08/2024 04:13, 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.
> 
> Minor nit: Please do not use abbreviate "source" in the bindings.
> I am not an expert on other changes below and will leave it to
> Rob/Krzysztof to comment.
> 
> Rob, Krzysztof,
> 
> We need someway to "link" (add a phandle) from a "port". The patch below
> is extending "standard" port to add a phandle. Please let us know if
> there is a better way.
> 
> e.g.:
> 
> filters = list of tuples of port, phandle. ?
> 
> e.g.:
> 
> filters = < 0, <&tpdm_video>,
>             1, <&tpdm_mdss>
> 	   >
>

Current solution feels like band-aid - what if next time you need some
second filter? Or "wall"? Or whatever? Next property?

Isn't filter just one endpoint in the graph?

A <--> filter <--> B

Instead of

A <----through-filter----> B?

Best regards,
Krzysztof