On 05/07/2024 10:51, Tao Zhang wrote:

Add a new property "filter_src" to label the source corresponding
to the output connection for a static replicator. By combining
a funnel and a static replicator in devicetree, a new device that
supports multi-port input and multi-port output is implemented.
In order to match the output port with the input port and
successfully build the trace path, add this new property to
indicate the data source corresponding to this output port.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
---
 .../arm/arm,coresight-static-replicator.yaml   | 18 +++++++++++++++++-
 1 file changed, 17 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..d9538563f9c6 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml
@@ -45,7 +45,21 @@ properties:
     patternProperties:
       '^port@[01]$':
         description: Output connections to CoreSight Trace bus
-        $ref: /schemas/graph.yaml#/properties/port
+        $ref: /schemas/graph.yaml#/$defs/port-base
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#

Ehm? How is this video interface?

I referred to other bindings which are done to add properties on endpoint node.

How should I add "$ref" here if this video interface is incorrect?

+
+            properties:
+              filter_src:

There are no properties with underscores...

+                $ref: /schemas/types.yaml#/definitions/phandle
+                description:
+                  defines a phandle reference to an associated CoreSight trace device.
+                  When the associated trace device is enabled, then the respective
+                  trace path will be built and enabled.

How does it differ from remote endpoint? What is "respective trace path"?

"filter-src" is not the remote endpoint which connect to the current device. It indicate

the source device reference of the trace path. Since our new funnel device fixes the

correspondence between the output port and the input port by connecting a static

replicator. Adding this property allows the driver to find the correct path for the output

port in building the path.

Best,

Tao

<form letter>
Please use scripts/get_maintainers.pl to get a list of necessary people
and lists to CC (and consider --no-git-fallback argument). It might
happen, that command when run on an older kernel, gives you outdated
entries. Therefore please be sure you base your patches on recent Linux
kernel.

Tools like b4 or scripts/get_maintainer.pl provide you proper list of
people, so fix your workflow. Tools might also fail if you work on some
ancient tree (don't, instead use mainline) or work on fork of kernel
(don't, instead use mainline). Just use b4 and everything should be
fine, although remember about `b4 prep --auto-to-cc` if you added new
patches to the patchset.
</form letter>


Best regards,
Krzysztof