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coresight-tpda: Optimize the function of reading element size

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Since the new funnel device supports multi-port output scenarios,
there may be more than one TPDM connected to one TPDA. In this
way, when reading the element size of the TPDM, TPDA driver needs
to find the expected TPDM corresponding to the filter source.
When TPDA finds a TPDM or a filter source from a input connection,
it will read the Devicetree to get the expected TPDM's element
size.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20241213100731.25914-5-quic_taozha@quicinc.com
This commit is contained in:
Tao Zhang 2024-12-13 18:07:31 +08:00 committed by Suzuki K Poulose
parent ec9903d6cc
commit 56e14a21ce
1 changed files with 10 additions and 1 deletions
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11
drivers/hwtracing/coresight/coresight-tpda.c
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@ -110,6 +110,16 @@ static int tpda_get_element_size(struct tpda_drvdata *drvdata,
csdev->pdata->in_conns[i]->dest_port != inport)
continue;
/*
* If this port has a hardcoded filter, use the source
* device directly.
*/
if (csdev->pdata->in_conns[i]->filter_src_fwnode) {
in = csdev->pdata->in_conns[i]->filter_src_dev;
if (!in)
continue;
}
if (coresight_device_is_tpdm(in)) {
if (drvdata->dsb_esize || drvdata->cmb_esize)
return -EEXIST;
@ -124,7 +134,6 @@ static int tpda_get_element_size(struct tpda_drvdata *drvdata,
}
}
return rc;
}