Mux configuration is often the final piece of mode entry and can be used
to determine whether a partner altmode is active. When mux configuration
is done, use the active port altmode's SVID to set the partner active
field for all partner alt modes.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
---

 drivers/platform/chrome/cros_ec_typec.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 4d305876ec08..6c0228981627 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -618,6 +618,7 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
 	};
 	struct ec_params_usb_pd_mux_ack mux_ack;
 	enum typec_orientation orientation;
+	struct cros_typec_altmode_node *node, *n;
 	int ret;
 
 	ret = cros_ec_cmd(typec->ec, 0, EC_CMD_USB_PD_MUX_INFO,
@@ -676,6 +677,16 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
 			port->mux_flags);
 	}
 
+	/* Iterate all partner alt-modes and set the active alternate mode. */
+	list_for_each_entry_safe(node, n, &port->partner_mode_list, list) {
+		if (port->state.alt != NULL &&
+		    node->amode->svid == port->state.alt->svid) {
+			typec_altmode_update_active(node->amode, true);
+		} else {
+			typec_altmode_update_active(node->amode, false);
+		}
+	}
+
 mux_ack:
 	if (!typec->needs_mux_ack)
 		return ret;
-- 
2.46.0.792.g87dc391469-goog

On Wed, Sep 25, 2024 at 09:25:06AM -0700, Abhishek Pandit-Subedi wrote:
> Mux configuration is often the final piece of mode entry and can be used
> to determine whether a partner altmode is active. When mux configuration
> is done, use the active port altmode's SVID to set the partner active
> field for all partner alt modes.
> 
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> ---
> 
>  drivers/platform/chrome/cros_ec_typec.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
> index 4d305876ec08..6c0228981627 100644
> --- a/drivers/platform/chrome/cros_ec_typec.c
> +++ b/drivers/platform/chrome/cros_ec_typec.c
> @@ -618,6 +618,7 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
>  	};
>  	struct ec_params_usb_pd_mux_ack mux_ack;
>  	enum typec_orientation orientation;
> +	struct cros_typec_altmode_node *node, *n;
>  	int ret;
>  
>  	ret = cros_ec_cmd(typec->ec, 0, EC_CMD_USB_PD_MUX_INFO,
> @@ -676,6 +677,16 @@ static int cros_typec_configure_mux(struct cros_typec_data *typec, int port_num,
>  			port->mux_flags);
>  	}
>  
> +	/* Iterate all partner alt-modes and set the active alternate mode. */
> +	list_for_each_entry_safe(node, n, &port->partner_mode_list, list) {
> +		if (port->state.alt != NULL &&
> +		    node->amode->svid == port->state.alt->svid) {
> +			typec_altmode_update_active(node->amode, true);
> +		} else {
> +			typec_altmode_update_active(node->amode, false);
> +		}
> +	}

This can be done in the alt mode drivers.

thanks,

-- 
heikki