linux-kernel - Re: [PATCH v1 3/4] usb: typec: ucsi: Delay alternate mode discovery

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Date: Tue, 23 Apr 2024 15:36:42 +0000
From: Benson Leung <bleung@...gle.com>
To: Jameson Thies <jthies@...gle.com>
Cc: heikki.krogerus@...ux.intel.com, linux-usb@...r.kernel.org,
	pmalani@...omium.org, abhishekpandit@...omium.org,
	andersson@...nel.org, dmitry.baryshkov@...aro.org,
	fabrice.gasnier@...s.st.com, gregkh@...uxfoundation.org,
	hdegoede@...hat.com, neil.armstrong@...aro.org,
	rajaram.regupathy@...el.com, saranya.gopal@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/4] usb: typec: ucsi: Delay alternate mode discovery

On Fri, Apr 19, 2024 at 09:16:49PM +0000, Jameson Thies wrote:
> Delay the ucsi_check_altmodes task to be inline with surrounding partner
> tasks. This allows partner, cable and identity discovery to complete
> before alternate mode registration. With that order, alternate mode
> discovery can be used to indicate the ucsi driver has completed
> discovery.
> 
> Signed-off-by: Jameson Thies <jthies@...gle.com>

Reviewed-by: Benson Leung <bleung@...omium.org>

> ---
>  drivers/usb/typec/ucsi/ucsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index b8d56a443531f..cd4c3b7a5d989 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -963,7 +963,7 @@ static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
>  		con->rdo = con->status.request_data_obj;
>  		typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
>  		ucsi_partner_task(con, ucsi_get_src_pdos, 30, 0);
> -		ucsi_partner_task(con, ucsi_check_altmodes, 30, 0);
> +		ucsi_partner_task(con, ucsi_check_altmodes, 30, HZ);
>  		ucsi_partner_task(con, ucsi_register_partner_pdos, 1, HZ);
>  		break;
>  	case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
> @@ -1247,7 +1247,7 @@ static void ucsi_handle_connector_change(struct work_struct *work)
>  	}
>  
>  	if (con->status.change & UCSI_CONSTAT_CAM_CHANGE)
> -		ucsi_partner_task(con, ucsi_check_altmodes, 1, 0);
> +		ucsi_partner_task(con, ucsi_check_altmodes, 1, HZ);
>  
>  out_unlock:
>  	mutex_unlock(&con->lock);
> -- 
> 2.44.0.769.g3c40516874-goog
> 

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