linux-kernel - Re: [PATCH v2 1/2] usb: typec: altmodes/displayport: Update active state

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Message-ID: <Y8+6pA9XHRA/mEH1@kuha.fi.intel.com>
Date:   Tue, 24 Jan 2023 13:01:56 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Prashant Malani <pmalani@...omium.org>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        bleung@...omium.org, gregkh@...uxfoundation.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH v2 1/2] usb: typec: altmodes/displayport: Update active
 state

On Fri, Jan 20, 2023 at 08:58:26PM +0000, Prashant Malani wrote:
> Update the altmode "active" state when we receive Acks for Enter and
> Exit Mode commands. Having the right state is necessary to change Pin
> Assignments using the 'pin_assignment" sysfs file.
> 
> Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Reviewed-by: Benson Leung <bleung@...omium.org>
> Signed-off-by: Prashant Malani <pmalani@...omium.org>

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

> ---
> 
> Changes since v1:
> - Dropped the Fixes and Cc: stable tags; given the discussion in [1]
>   I no longer think this constitutes a fix.
> - Added Reviewed-by tag from Benson.
> 
> [1] https://lore.kernel.org/linux-usb/20230118031514.1278139-1-pmalani@chromium.org/
> 
>  drivers/usb/typec/altmodes/displayport.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
> index 06fb4732f8cd..bc1c556944d6 100644
> --- a/drivers/usb/typec/altmodes/displayport.c
> +++ b/drivers/usb/typec/altmodes/displayport.c
> @@ -277,9 +277,11 @@ static int dp_altmode_vdm(struct typec_altmode *alt,
>  	case CMDT_RSP_ACK:
>  		switch (cmd) {
>  		case CMD_ENTER_MODE:
> +			typec_altmode_update_active(alt, true);
>  			dp->state = DP_STATE_UPDATE;
>  			break;
>  		case CMD_EXIT_MODE:
> +			typec_altmode_update_active(alt, false);
>  			dp->data.status = 0;
>  			dp->data.conf = 0;
>  			break;
> -- 
> 2.39.0.246.g2a6d74b583-goog

-- 
heikki