diff mbox series

[v1,4/4] usb: typec: ucsi: Always set number of alternate modes

Message ID 20240419211650.2657096-5-jthies@google.com
State Superseded
Headers show
Series usb: typec: ucsi: Update UCSI alternate mode | expand

Commit Message

Jameson Thies April 19, 2024, 9:16 p.m. UTC
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.

Signed-off-by: Jameson Thies <jthies@google.com>
---
 drivers/usb/typec/ucsi/ucsi.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

Comments

Heikki Krogerus April 22, 2024, 12:41 p.m. UTC | #1
On Fri, Apr 19, 2024 at 09:16:50PM +0000, Jameson Thies wrote:
> 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.
> 
> Signed-off-by: Jameson Thies <jthies@google.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
>  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 cd4c3b7a5d989..ea76d42fd1504 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;
>  }
>  
> -- 
> 2.44.0.769.g3c40516874-goog
diff mbox series

Patch

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index cd4c3b7a5d989..ea76d42fd1504 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;
 }