linux-kernel - [PATCH 4/6] usb: typec: ucsi: Report power supply change on sink path change

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Message-ID: <20251007000007.3724229-5-jthies@google.com>
Date: Tue,  7 Oct 2025 00:00:05 +0000
From: Jameson Thies <jthies@...gle.com>
To: heikki.krogerus@...ux.intel.com, linux-usb@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Cc: jthies@...gle.com, dmitry.baryshkov@....qualcomm.com, bleung@...omium.org, 
	gregkh@...uxfoundation.org, akuchynski@...omium.org, 
	abhishekpandit@...omium.org, sebastian.reichel@...labora.com, 
	linux-pm@...r.kernel.org
Subject: [PATCH 4/6] usb: typec: ucsi: Report power supply change on sink path change

Update the UCSI interface driver to report a power supply change when
the PPM sets the Sink Path Change bit.

Signed-off-by: Jameson Thies <jthies@...gle.com>
---
 drivers/usb/typec/ucsi/ucsi.c | 2 +-
 drivers/usb/typec/ucsi/ucsi.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 7b718049d0d1..1a7d850b11ea 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -1293,7 +1293,7 @@ static void ucsi_handle_connector_change(struct work_struct *work)
 	if (change & UCSI_CONSTAT_CAM_CHANGE)
 		ucsi_partner_task(con, ucsi_check_altmodes, 1, HZ);
 
-	if (change & UCSI_CONSTAT_BC_CHANGE)
+	if (change & UCSI_CONSTAT_BC_CHANGE || change & UCSI_CONSTAT_SINK_PATH_CHANGE)
 		ucsi_port_psy_changed(con);
 
 	if (con->ucsi->version >= UCSI_VERSION_2_1 &&
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index cce93af7461b..35993bc34d4d 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -382,6 +382,7 @@ struct ucsi_cable_property {
 #define UCSI_CONSTAT_BC_CHANGE			BIT(9)
 #define UCSI_CONSTAT_PARTNER_CHANGE		BIT(11)
 #define UCSI_CONSTAT_POWER_DIR_CHANGE		BIT(12)
+#define UCSI_CONSTAT_SINK_PATH_CHANGE		BIT(13)
 #define UCSI_CONSTAT_CONNECT_CHANGE		BIT(14)
 #define UCSI_CONSTAT_ERROR			BIT(15)
 
-- 
2.51.0.618.g983fd99d29-goog