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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/qcom,coresight-tpda.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Trace, Profiling and Diagnostics Aggregator - TPDA
description: |
TPDAs are responsible for packetization and timestamping of data sets
utilizing the MIPI STPv2 packet protocol. Pulling data sets from one or
more attached TPDM and pushing the resultant (packetized) data out a
master ATB interface. Performing an arbitrated ATB interleaving (funneling)
task for free-flowing data from TPDM (i.e. CMB and DSB data set flows).
There is no strict binding between TPDM and TPDA. TPDA can have multiple
TPDMs connect to it. But There must be only one TPDA in the path from the
TPDM source to TMC sink. TPDM can directly connect to TPDA's inport or
connect to funnel which will connect to TPDA's inport.
We can use the commands are similar to the below to validate TPDMs.
Enable coresight sink first.
echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
The test data will be collected in the coresight sink which is enabled.
If rwp register of the sink is keeping updating when do integration_test
(by cat tmc_etf0/mgmt/rwp), it means there is data generated from TPDM
to sink.
maintainers:
- Mao Jinlong <quic_jinlmao@quicinc.com>
- Tao Zhang <quic_taozha@quicinc.com>
# Need a custom select here or 'arm,primecell' will match on lots of nodes
select:
properties:
compatible:
contains:
enum:
- qcom,coresight-tpda
required:
- compatible
properties:
$nodename:
pattern: "^tpda(@[0-9a-f]+)$"
compatible:
items:
- const: qcom,coresight-tpda
- const: arm,primecell
reg:
minItems: 1
maxItems: 2
clocks:
maxItems: 1
clock-names:
items:
- const: apb_pclk
in-ports:
type: object
description: |
Input connections from TPDM to TPDA
$ref: /schemas/graph.yaml#/properties/ports
out-ports:
type: object
description: |
Output connections from the TPDA to legacy CoreSight trace bus.
$ref: /schemas/graph.yaml#/properties/ports
properties:
port:
description:
Output connection from the TPDA to legacy CoreSight Trace bus.
$ref: /schemas/graph.yaml#/properties/port
required:
- compatible
- reg
- clocks
- clock-names
- in-ports
- out-ports
additionalProperties: false
examples:
# minimum tpda definition.
- |
tpda@6004000 {
compatible = "qcom,coresight-tpda", "arm,primecell";
reg = <0x6004000 0x1000>;
clocks = <&aoss_qmp>;
clock-names = "apb_pclk";
in-ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
tpda_qdss_0_in_tpdm_dcc: endpoint {
remote-endpoint =
<&tpdm_dcc_out_tpda_qdss_0>;
};
};
};
out-ports {
port {
tpda_qdss_out_funnel_in0: endpoint {
remote-endpoint =
<&funnel_in0_in_tpda_qdss>;
};
};
};
};
...
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