Re: [PATCH v1] usb: typec: tcpm: Query Source partner for FRS capability only if it is DRP

[Guenter Roeck]

On 12/4/23 23:47, Kyle Tso wrote:
> Source-only port partner will always respond NOT_SUPPORTED to
> GET_SINK_CAP. Avoid this redundant AMS by bailing out querying the FRS
> capability if the Source port partner is not DRP.
>
> Signed-off-by: Kyle Tso <kyletso@xxxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
>   drivers/usb/typec/tcpm/tcpm.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 50cbc52386b3..192c103e0d10 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -4401,7 +4401,8 @@ static void run_state_machine(struct tcpm_port *port)
>   			tcpm_set_current_limit(port, tcpm_get_current_limit(port), 5000);
>   		tcpm_swap_complete(port, 0);
>   		tcpm_typec_connect(port);
> -		mod_enable_frs_delayed_work(port, 0);
> +		if (port->pd_capable && port->source_caps[0] & PDO_FIXED_DUAL_ROLE)
> +			mod_enable_frs_delayed_work(port, 0);
>   		tcpm_pps_complete(port, port->pps_status);
>   
>   		if (port->ams != NONE_AMS)