linux-kernel - Re: [PATCH 1/3] usb: typec: ucsi: call typec_set

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Message-ID: <c0bb8255-db4f-e93b-5593-0faa32e44410@linaro.org>
Date:   Mon, 26 Jun 2023 15:23:11 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/3] usb: typec: ucsi: call typec_set_mode on non-altmode
 partner change

Hi,

On 26/06/2023 10:12, Heikki Krogerus wrote:
> Hi Neil,
> 
> Sorry to keep you waiting.

No problem, thanks for reviewing my patches!

> 
> On Wed, Jun 14, 2023 at 03:10:39PM +0200, Neil Armstrong wrote:
>> Add support for calling typec_set_mode() for the DEBUG, AUDIO
>> accessory modes.
>>
>> Let's also call typec_set_mode() for USB as default and SAFE
>> when partner is disconnected.
>>
>> The USB state is only called when ALT mode is specifically
>> not specified by the partner status flags in order
>> to leave the altmode handlers setup the proper mode to
>> switches, muxes and retimers.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>> ---
>>   drivers/usb/typec/ucsi/ucsi.c | 17 +++++++++++++++++
>>   1 file changed, 17 insertions(+)
>>
>> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
>> index 2b472ec01dc4..44f43cdea5c1 100644
>> --- a/drivers/usb/typec/ucsi/ucsi.c
>> +++ b/drivers/usb/typec/ucsi/ucsi.c
>> @@ -809,6 +809,23 @@ static void ucsi_partner_change(struct ucsi_connector *con)
>>   		break;
>>   	}
>>   
>> +	if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
>> +		switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
>> +		case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
>> +			typec_set_mode(con->port, TYPEC_MODE_DEBUG);
>> +			break;
>> +		case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
>> +			typec_set_mode(con->port, TYPEC_MODE_AUDIO);
>> +			break;
>> +		default:
>> +			if (UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) ==
>> +					UCSI_CONSTAT_PARTNER_FLAG_USB)
>> +				typec_set_mode(con->port, TYPEC_STATE_USB);
>> +		}
>> +	} else {
>> +		typec_set_mode(con->port, TYPEC_STATE_SAFE);
>> +	}
> 
> Can you do that (set safe mode) in ucsi_unregister_partner() instead?

It seems greg already landed the patch into usb-next, but I can send a fix to
move it to unregister

Neil

> 
> thanks,
>