On 09/25/2017 05:45 PM, Li Jun wrote:
As we should only drive connected cc line to be the right state when
attached, and keeps the other one to be open, so update the set_cc
interface for that.
Signed-off-by: Li Jun <jun.li@xxxxxxx>
---
drivers/usb/typec/tcpm.c | 12 +++++++++++-
include/linux/usb/tcpm.h | 3 ++-
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index 38a6223..c9966ee 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -1857,9 +1857,15 @@ static bool tcpm_start_drp_toggling(struct tcpm_port *port,
static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
{
+ bool attached;
+
tcpm_log(port, "cc:=%d", cc);
port->cc_req = cc;
- port->tcpc->set_cc(port->tcpc, cc);
+ if (port->state == SRC_ATTACHED || port->state == SNK_ATTACHED)
+ attached = true;
+ else
+ attached = false;
+ port->tcpc->set_cc(port->tcpc, cc, attached, port->polarity);
Polarity should be set with set_polarity(). Is it necessary to duplicate that ?
}
static int tcpm_init_vbus(struct tcpm_port *port)
@@ -1913,6 +1919,8 @@ static int tcpm_src_attach(struct tcpm_port *port)
if (ret < 0)
return ret;
+ tcpm_set_cc(port, tcpm_rp_cc(port));
+
ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
if (ret < 0)
return ret;
@@ -2028,6 +2036,8 @@ static int tcpm_snk_attach(struct tcpm_port *port)
if (ret < 0)
return ret;
+ tcpm_set_cc(port, TYPEC_CC_RD);
+
ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
if (ret < 0)
return ret;
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index a67cf77..a007e2a1 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -159,7 +159,8 @@ struct tcpc_dev {
int (*init)(struct tcpc_dev *dev);
int (*get_vbus)(struct tcpc_dev *dev);
int (*get_current_limit)(struct tcpc_dev *dev);
- int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc);
+ int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc,
+ bool attached, enum typec_cc_polarity polarity);
int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1,
enum typec_cc_status *cc2);
int (*set_polarity)(struct tcpc_dev *dev,
--
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