trace/coresight/coresight-tpda.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 The trace performance monitoring and diagnostics aggregator(TPDA)
11 --------------------
13 TPDA - The trace performance monitoring and diagnostics aggregator or
14 TPDA in short serves as an arbitration and packetization engine for the
16 The primary use case of the TPDA is to provide packetization, funneling
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22 Root: ``/sys/bus/coresight/devices/tpda<N>``
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27 The tpdm and tpda nodes should be observed at the coresight path
28 "/sys/bus/coresight/devices".
30 /sys/bus/coresight/devices # ls -l | grep tpd
31 tpda0 -> ../../../devices/platform/soc@0/6004000.tpda/tpda0
32 tpdm0 -> ../../../devices/platform/soc@0/6c08000.mm.tpdm/tpdm0
35 Enable coresight sink first. The port of tpda which is connected to
38 echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
39 echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
40 echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
41 echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
43 The test data will be collected in the coresight sink which is enabled.
48 There must be a tpda between tpdm and the sink. When there are some
50 and these hw components will connect to the coresight funnel. When
52 tpda directly.