FAILED: patch "[PATCH] usb: typec: tcpm: Address incorrect values of tcpm psy for" failed to apply to 4.19-stable tree
From: <gregkh@linuxfoundation.org>
Date: 2021-05-12 08:43:41
Subsystem:
the rest, usb subsystem, usb typec class, usb typec port controller drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Heikki Krogerus, Badhri Jagan Sridharan
The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to [off-list ref].
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From f3dedafb8263ca4791a92a23f5230068f5bde008 Mon Sep 17 00:00:00 2001
From: Badhri Jagan Sridharan <badhri@google.com>
Date: Wed, 7 Apr 2021 13:07:18 -0700
Subject: [PATCH] usb: typec: tcpm: Address incorrect values of tcpm psy for
fixed supply
tcpm_pd_build_request overwrites current_limit and supply_voltage
even before port partner accepts the requests. This leaves stale
values in current_limit and supply_voltage that get exported by
"tcpm-source-psy-". Solving this problem by caching the request
values of current limit/supply voltage in req_current_limit
and req_supply_voltage. current_limit/supply_voltage gets updated
once the port partner accepts the request.
Fixes: f2a8aa053c176 ("typec: tcpm: Represent source supply through power_supply")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Cc: stable <redacted>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Adam Thomson <redacted>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210407200723.1914388-1-badhri@google.com (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index ca1fc77697fc..4ea4b30ae885 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c@@ -389,7 +389,10 @@ struct tcpm_port { unsigned int operating_snk_mw; bool update_sink_caps; - /* Requested current / voltage */ + /* Requested current / voltage to the port partner */ + u32 req_current_limit; + u32 req_supply_voltage; + /* Actual current / voltage limit of the local port */ u32 current_limit; u32 supply_voltage;
@@ -2435,8 +2438,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, case SNK_TRANSITION_SINK: if (port->vbus_present) { tcpm_set_current_limit(port, - port->current_limit, - port->supply_voltage); + port->req_current_limit, + port->req_supply_voltage); port->explicit_contract = true; tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
@@ -2545,8 +2548,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, break; case SNK_NEGOTIATE_PPS_CAPABILITIES: port->pps_data.active = true; - port->supply_voltage = port->pps_data.out_volt; - port->current_limit = port->pps_data.op_curr; + port->req_supply_voltage = port->pps_data.out_volt; + port->req_current_limit = port->pps_data.op_curr; tcpm_set_state(port, SNK_TRANSITION_SINK, 0); break; case SOFT_RESET_SEND:
@@ -3195,8 +3198,8 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); } - port->current_limit = ma; - port->supply_voltage = mv; + port->req_current_limit = ma; + port->req_supply_voltage = mv; return 0; }