Type-c class provides an option to expose the number of alternate
modes in the port partner as a sysfs interface. Use that to
expose the number of alternate modes in the port partner from
the ucsi driver.
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Rajaram Regupathy <rajaram.regupathy@xxxxxxxxx>
Signed-off-by: Saranya Gopal <saranya.gopal@xxxxxxxxx>
---
drivers/usb/typec/ucsi/ucsi.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 6aa28384f77f..9d6b7e02d6ef 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -303,6 +303,17 @@ static int ucsi_next_altmode(struct typec_altmode **alt)
return -ENOENT;
}
+static int ucsi_get_num_altmode(struct typec_altmode **alt)
+{
+ int i;
+
+ for (i = 0; i < UCSI_MAX_ALTMODES; i++)
+ if (!alt[i])
+ break;
+
+ return i;
+}
+
static int ucsi_register_altmode(struct ucsi_connector *con,
struct typec_altmode_desc *desc,
u8 recipient)
@@ -607,7 +618,7 @@ static int ucsi_get_src_pdos(struct ucsi_connector *con)
static int ucsi_check_altmodes(struct ucsi_connector *con)
{
- int ret;
+ int ret, num_partner_am;
ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
if (ret && ret != -ETIMEDOUT)
@@ -617,6 +628,9 @@ static int ucsi_check_altmodes(struct ucsi_connector *con)
/* Ignoring the errors in this case. */
if (con->partner_altmode[0]) {
+ num_partner_am = ucsi_get_num_altmode(con->partner_altmode);
+ if (num_partner_am > 0)
+ typec_partner_set_num_altmodes(con->partner, num_partner_am);
ucsi_altmode_update_active(con);
return 0;
}
--
2.17.1
