coresight: Make sysfs functional on topologies with per core sink

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Coresight driver assumes sink is common across all the ETMs,
and tries to build a path between ETM and the first enabled
sink found using bus based search. This breaks sysFS usage
on implementations that has multiple per core sinks in
enabled state.

To fix this, coresight_get_enabled_sink API is updated to
do a connection based search starting from the given source,
instead of bus based search.
With sink selection using sysfs depecrated for perf interface,
provision for reset is removed as well in this API.

Signed-off-by: Linu Cherian <lcherian@marvell.com>
[Fixed indentation problem and removed obsolete comment]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200916191737.4001561-15-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Linu Cherian 2020-09-16 13:17:35 -06:00 • committed by Greg Kroah-Hartman

parent bb1860efc8

commit 6d578258b9

2 changed files with 29 additions and 36 deletions

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3

drivers/hwtracing/coresight/coresight-priv.h

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62

drivers/hwtracing/coresight/coresight.c

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