linux-kernel - Re: [PATCH 08/11] usb: typec: tipd: Update partner identity when power status was updated

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Message-ID: <aMgRIoaIbMDH3aAl@kuha.fi.intel.com>
Date: Mon, 15 Sep 2025 16:14:10 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Sven Peter <sven@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Janne Grunau <j@...nau.net>, Neal Gompa <neal@...pa.dev>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	Hector Martin <marcan@...can.st>
Subject: Re: [PATCH 08/11] usb: typec: tipd: Update partner identity when
 power status was updated

On Sun, Sep 14, 2025 at 12:56:13PM +0000, Sven Peter wrote:
> From: Hector Martin <marcan@...can.st>
> 
> Whenever the power status is changed make sure to also update the
> partner identity to be able to detect changes once de-bouncing and mode
> changes are added for CD321x.
> 
> Signed-off-by: Hector Martin <marcan@...can.st>
> Reviewed-by: Neal Gompa <neal@...pa.dev>
> Signed-off-by: Sven Peter <sven@...nel.org>

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

> ---
>  drivers/usb/typec/tipd/core.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index c7cf936e5a61a331271c05b68ff1b77b89c0f643..e16c6c07c72a3e285f1fc94db72bed8dc3217a1d 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -635,9 +635,16 @@ static irqreturn_t cd321x_interrupt(int irq, void *data)
>  	if (!tps6598x_read_status(tps, &status))
>  		goto err_unlock;
>  
> -	if (event & APPLE_CD_REG_INT_POWER_STATUS_UPDATE)
> +	if (event & APPLE_CD_REG_INT_POWER_STATUS_UPDATE) {
>  		if (!tps6598x_read_power_status(tps))
>  			goto err_unlock;
> +		if (TPS_POWER_STATUS_PWROPMODE(tps->pwr_status) == TYPEC_PWR_MODE_PD) {
> +			if (tps6598x_read_partner_identity(tps)) {
> +				dev_err(tps->dev, "failed to read partner identity\n");
> +				tps->partner_identity = (struct usb_pd_identity) {0};
> +			}
> +		}
> +	}
>  
>  	if (event & APPLE_CD_REG_INT_DATA_STATUS_UPDATE)
>  		if (!tps->data->read_data_status(tps))
> 
> -- 
> 2.34.1
> 

-- 
heikki