diff mbox series

[v4,4/4] coresight-tpda: Optimize the function of reading element size

Message ID 20241024065306.14647-5-quic_taozha@quicinc.com
State Superseded
Headers show
Series source filtering for multi-port output | expand

Commit Message

Tao Zhang Oct. 24, 2024, 6:53 a.m. UTC 
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>
---
 drivers/hwtracing/coresight/coresight-tpda.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c
index ad023a2a99d1..413828f19d60 100644
--- a/drivers/hwtracing/coresight/coresight-tpda.c
+++ b/drivers/hwtracing/coresight/coresight-tpda.c
@@ -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;
 }