linux-kernel - [PATCH v2] usb: typec: clear usb_pd flag if change to typec only mode

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Date:   Thu,  2 Dec 2021 15:43:12 +0800
From:   Steven Syu <stevensyu7@...il.com>
To:     heikki.krogerus@...ux.intel.com
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, Steven Syu <stevensyu7@...il.com>
Subject: [PATCH v2] usb: typec: clear usb_pd flag if change to typec only mode

Set usb_pd to 0 when power operation mode
leaving power delivery. That can avoid user-sepace
read "yes" form the supports_usb_power_delivery_show() attribute
but power operation mode already change form power delivery to
others mode.

Signed-off-by: Steven Syu <stevensyu7@...il.com>
---
 drivers/usb/typec/class.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index aeef453..2043e07 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1718,6 +1718,8 @@ void typec_set_pwr_opmode(struct typec_port *port,
 			partner->usb_pd = 1;
 			sysfs_notify(&partner_dev->kobj, NULL,
 				     "supports_usb_power_delivery");
+		} else if (opmode != TYPEC_PWR_MODE_PD && partner->usb_pd) {
+			partner->usb_pd = 0;
 		}
 		put_device(partner_dev);
 	}
-- 
2.7.4