linux-kernel - [PATCH 1/6] platform/chrome: cros_ec_typec: Make disc

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Message-Id: <20201106012758.525472-2-pmalani@chromium.org>
Date:   Thu,  5 Nov 2020 17:27:53 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     heikki.krogerus@...ux.intel.com, dzigterman@...omium.org,
        alevkoy@...omium.org, Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <groeck@...omium.org>,
        linux-usb@...r.kernel.org (open list:USB SUBSYSTEM)
Subject: [PATCH 1/6] platform/chrome: cros_ec_typec: Make disc_done flag partner-only

Change the disc_done flag, which indicates whether PD discovery is
complete, to sop_disc_done instead, since we will process SOP and SOP'
discovery data separately.

Signed-off-by: Prashant Malani <pmalani@...omium.org>
---
 drivers/platform/chrome/cros_ec_typec.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index ce031a10eb1b..801c3d2c1fbd 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -57,8 +57,8 @@ struct cros_typec_port {
 	/* Port alt modes. */
 	struct typec_altmode p_altmode[CROS_EC_ALTMODE_MAX];
 
-	/* Flag indicating that PD discovery data parsing is completed. */
-	bool disc_done;
+	/* Flag indicating that PD partner discovery data parsing is completed. */
+	bool sop_disc_done;
 	struct ec_response_typec_discovery *sop_disc;
 	struct list_head partner_mode_list;
 };
@@ -210,7 +210,7 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
 	typec_unregister_partner(port->partner);
 	port->partner = NULL;
 	memset(&port->p_identity, 0, sizeof(port->p_identity));
-	port->disc_done = false;
+	port->sop_disc_done = false;
 }
 
 static void cros_unregister_ports(struct cros_typec_data *typec)
@@ -727,18 +727,13 @@ static void cros_typec_handle_status(struct cros_typec_data *typec, int port_num
 		return;
 	}
 
-	if (typec->ports[port_num]->disc_done)
-		return;
-
 	/* Handle any events appropriately. */
-	if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE) {
+	if (resp.events & PD_STATUS_EVENT_SOP_DISC_DONE && !typec->ports[port_num]->sop_disc_done) {
 		ret = cros_typec_handle_sop_disc(typec, port_num);
-		if (ret < 0) {
+		if (ret < 0)
 			dev_err(typec->dev, "Couldn't parse SOP Disc data, port: %d\n", port_num);
-			return;
-		}
-
-		typec->ports[port_num]->disc_done = true;
+		else
+			typec->ports[port_num]->sop_disc_done = true;
 	}
 }
 
-- 
2.29.1.341.ge80a0c044ae-goog