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usb: typec: ucsi: Always set number of alternate modes

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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>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240510201244.2968152-5-jthies@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jameson Thies 2024-05-10 20:12:44 +00:00 committed by Greg Kroah-Hartman
parent 4ea9d86d0a
commit c313a44ac9
1 changed files with 11 additions and 3 deletions
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14
drivers/usb/typec/ucsi/ucsi.c
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@ -812,10 +812,11 @@ static int ucsi_check_altmodes(struct ucsi_connector *con)
/* Ignoring the errors in this case. */ /* Ignoring the errors in this case. */
if (con->partner_altmode[0]) { if (con->partner_altmode[0]) {
num_partner_am = ucsi_get_num_altmode(con->partner_altmode); 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); ucsi_altmode_update_active(con);
return 0; return 0;
} else {
typec_partner_set_num_altmodes(con->partner, 0);
} }
return ret; return ret;
@ -1138,7 +1139,7 @@ static int ucsi_check_connection(struct ucsi_connector *con)
static int ucsi_check_cable(struct ucsi_connector *con) static int ucsi_check_cable(struct ucsi_connector *con)
{ {
u64 command; u64 command;
int ret; int ret, num_plug_am;
if (con->cable) if (con->cable)
return 0; return 0;
@ -1172,6 +1173,13 @@ static int ucsi_check_cable(struct ucsi_connector *con)
return ret; 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; return 0;
} }