Re: [PATCH 1/4] dt-bindings: arm: qcom,coresight-funnel: Add label for multi-ouput
From: Tingwei Zhang
Date: Fri Mar 22 2024 - 06:23:12 EST
On 3/22/2024 5:42 PM, Suzuki K Poulose wrote:
On 22/03/2024 07:02, Tingwei Zhang wrote:
On 3/21/2024 10:42 PM, Rob Herring wrote:
On Thu, Mar 21, 2024 at 04:32:04PM +0800, Tao Zhang wrote:
Add new property "label" to label the source corresponding to the
output connection. When the funnel supports multi-output, this
property needs to be introduced to mark which source component a
certain output connection corresponds to.
Signed-off-by: Tao Zhang <quic_taozha@xxxxxxxxxxx>
---
.../arm/arm,coresight-dynamic-funnel.yaml | 34
++++++++++++++++---
1 file changed, 30 insertions(+), 4 deletions(-)
diff --git
a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
index 44a1041cb0fc..cde62c286d29 100644
---
a/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
+++
b/Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml
@@ -66,13 +66,39 @@ properties:
$ref: /schemas/graph.yaml#/properties/port
out-ports:
- $ref: /schemas/graph.yaml#/properties/ports
- additionalProperties: false
-
+ type: object
properties:
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
port:
+ type: object
+
+ patternProperties:
+ '^port(@[0-7])?$':
+ type: object
description: Output connection to CoreSight Trace bus
- $ref: /schemas/graph.yaml#/properties/port
Nope, now you have no constraints on port node properties. Please look
at how other bindings are done to add properties on endpoint node.
Thanks for pointing this out, Rob. Shall we ref port-base and
endpoint-base then add new properties on endpoint? In this way, the
redundant code from port schema is not required.
+
+ patternProperties:
+ "^endpoint(@[0-9a-f]+)?$":
+ type: object
+ properties:
+ remote-endpoint:
+ description: |
+ phandle to an 'endpoint' subnode of a remote
device node.
+ $ref: /schemas/types.yaml#/definitions/phandle
Don't need this.
+ label:
+ description: Label the source corresponding to the
output connection
+ $ref: /schemas/types.yaml#/definitions/string
label already has a type.
As this node is an output, aren't you labeling what the destination is,
not the "source"?
Why can't you look at the remote connection to identify what it is?
This funnel can route data stream from different trace source to
different output ports. This lable property is added to describe which
source is routed to this output port.
For example, the graph is as below. Funnel3 routes trace data from
TPDM0 to output[0] and output[0] of funnel3 is connected to input[0]
of TPDA0.
Funnel3 and Funnel4 are really Replicators ! How are they Funnels ?
Again, my question still stands. Are Funnel(Replicator-renamed)3/4 and
Funnel 0/1/2 programmable ?
Sorry for oversimplied the topology. Funnel3 and Funnel4 have multiple
input ports instead of just one input port. It can have multiple input
ports and multiple output ports. Unlike replicator, it won't replicate
same data trace to all the outputs.
Funnel3/funnel4 has same programing capability like standard coresight
funnel. It can enable input ports as requested. It can not be programed
to route which source to which output ports. Hardware staticlly defined
which source is routed to which output.
Suzuki
While Funnels routes trace data from TPDM1 to output[1] which connects
to input[1] of TPDA0. Hope that clarifies this a little bit.
|---------| |---------| |---------| |---------| |---------|
| TPDM0 | | TPDM1 | | TPDM2 | | TPDM3 | | TPDM4 |
|---------| |---------| |---------| |---------| |---------|
| | | | |
| | | | |
| | | | |
|-----| |-----| |-----| |-----| |
| | | | |
| | | | |
[0]| |[1] [0]| |[1] |
\-------------/ \-------------/ \------------/
\ FUNNEL0 / \ FUNNEL1 / \ FUNNEL2 /
----------- ----------- -----------
| | |
\-------------/ \-------------/ |
\ FUNNEL3 / \ FUNNEL4 / |
----------- ----------- |
| | | |
[0]| |[1] [0]| |[1] |
| |---------- | | |
| | | | |
|-------| | |------- | | |--------- |
| | | | |
| | | | |
[0]| |[1] |[2] |[3] |[4]
\ ---------------------------------------------------/
\ TPDA0 /
\ /
------------------------------------------------
+ oneOf:
+ - required:
+ - port
+ - required:
+ - "#address-cells"
+ - "#size-cells"
The common schema that you removed handles this.
Rob
--
Thanks,
Tingwei