JetPack 4.2 Coresight issue

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hello,

I just installed JetPack 4.2 on Jetson TX2, and I don’t see any of the Coresight components any more under /sys/bus/coresight

Can somebody confirm that the coresight has been disabled in this release? Are there any steps that I can do to enable it?

It worked properly on the previous 3.1.1 release with kernel 4.4.38 but on the new kernel 4.9 everything related to Coresight is gone.

2

I haven’t installed this release yet, but what do you see from:

gunzip < /proc/config.gz | grep -i coresight

An older release I see has this:

CONFIG_CORESIGHT=y
CONFIG_CORESIGHT_LINKS_AND_SINKS=y
CONFIG_CORESIGHT_LINK_AND_SINK_TMC=y
CONFIG_CORESIGHT_SINK_TPIU=y
CONFIG_CORESIGHT_SINK_ETBV10=y
# CONFIG_CORESIGHT_SOURCE_ETM3X is not set
CONFIG_CORESIGHT_SOURCE_ETM4X=y
# CONFIG_CORESIGHT_QCOM_REPLICATOR is not set
3

yes the older release had it configured, but when I check the kernel config in the latest release says:

CONFIG_CORESIGHT is not set

4

I have not used the feature, but in theory you would need to flash a new kernel and modules (this is an integrated feature and somewhat invasive…I would not trust to use old modules on a kernel with those changes, so I’d set a new “uname -r” via an alternate CONFIG_LOCALVERSION, and then install both the new kernel and modules).