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Subject[PATCH v4 4/4] usb: typec: ucsi: Always set number of alternate modes
From
Providing the number of known alternate modes allows user space to
determine when device registration has completed. Always register a
number of known alternate modes for the partner and cable plug, even
when the number of supported alternate modes is 0.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Jameson Thies <jthies@google.com>
---
Changes in V4:
- None.

Changes in V3:
- None.

Changes in V2:
- None.

drivers/usb/typec/ucsi/ucsi.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index bb6e57064513d..52a14bfe4107e 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -812,10 +812,11 @@ 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);
+ typec_partner_set_num_altmodes(con->partner, num_partner_am);
ucsi_altmode_update_active(con);
return 0;
+ } else {
+ typec_partner_set_num_altmodes(con->partner, 0);
}

return ret;
@@ -1138,7 +1139,7 @@ static int ucsi_check_connection(struct ucsi_connector *con)
static int ucsi_check_cable(struct ucsi_connector *con)
{
u64 command;
- int ret;
+ int ret, num_plug_am;

if (con->cable)
return 0;
@@ -1172,6 +1173,13 @@ static int ucsi_check_cable(struct ucsi_connector *con)
return ret;
}

+ if (con->plug_altmode[0]) {
+ num_plug_am = ucsi_get_num_altmode(con->plug_altmode);
+ typec_plug_set_num_altmodes(con->plug, num_plug_am);
+ } else {
+ typec_plug_set_num_altmodes(con->plug, 0);
+ }
+
return 0;
}

--
2.45.0.118.g7fe29c98d7-goog

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