linux-kernel - [PATCH 5.4 016/244] usb: typec: tcpm: update power supply once partner accepts

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Date:   Wed, 12 May 2021 16:46:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Badhri Jagan Sridharan <badhri@...gle.com>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: [PATCH 5.4 016/244] usb: typec: tcpm: update power supply once partner accepts

From: Badhri Jagan Sridharan <badhri@...gle.com>

commit 4050f2683f2c3151dc3dd1501ac88c57caf810ff upstream.

power_supply_changed needs to be called to notify clients
after the partner accepts the requested values for the pps
case.

Also, remove the redundant power_supply_changed at the end
of the tcpm_reset_port as power_supply_changed is already
called right after usb_type is changed.

Fixes: f2a8aa053c176 ("typec: tcpm: Represent source supply through power_supply")
Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
Cc: stable <stable@...r.kernel.org>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Link: https://lore.kernel.org/r/20210407200723.1914388-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/typec/tcpm/tcpm.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -1820,6 +1820,7 @@ static void tcpm_pd_ctrl_request(struct
 			port->pps_data.max_curr = port->pps_data.req_max_curr;
 			port->req_supply_voltage = port->pps_data.req_out_volt;
 			port->req_current_limit = port->pps_data.req_op_curr;
+			power_supply_changed(port->psy);
 			tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
 			break;
 		case SOFT_RESET_SEND:
@@ -2343,7 +2344,6 @@ static unsigned int tcpm_pd_select_pps_a
 						      port->pps_data.req_out_volt));
 		port->pps_data.req_op_curr = min(port->pps_data.max_curr,
 						 port->pps_data.req_op_curr);
-		power_supply_changed(port->psy);
 	}
 
 	return src_pdo;
@@ -2743,8 +2743,6 @@ static void tcpm_reset_port(struct tcpm_
 	port->try_src_count = 0;
 	port->try_snk_count = 0;
 	port->usb_type = POWER_SUPPLY_USB_TYPE_C;
-
-	power_supply_changed(port->psy);
 }
 
 static void tcpm_detach(struct tcpm_port *port)