linux-kernel - Re: [PATCH 1/8] usb: typec: Handle retimers in typec_set

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Date: Tue, 16 Apr 2024 19:26:39 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/8] usb: typec: Handle retimers in typec_set_mode()

On 16/04/2024 04:20, Dmitry Baryshkov wrote:
> Make typec_set_mode() also handle retimers in addition to muxes. Setting
> the USB mode requires retimers to be configured in addition to just
> switching the mux configuration.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
>   drivers/usb/typec/class.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 9610e647a8d4..28d395535bd1 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -2095,14 +2095,21 @@ EXPORT_SYMBOL_GPL(typec_get_orientation);
>    * @mode: Accessory Mode, USB Operation or Safe State
>    *
>    * Configure @port for Accessory Mode @mode. This function will configure the
> - * muxes needed for @mode.
> + * muxes and retimeres needed for @mode.
>    */
>   int typec_set_mode(struct typec_port *port, int mode)
>   {
> +	struct typec_retimer_state retimer_state = { };
>   	struct typec_mux_state state = { };
> +	int ret;
>   
> +	retimer_state.mode = mode;
>   	state.mode = mode;
>   
> +	ret = typec_retimer_set(port->retimer, &retimer_state);
> +	if (ret)
> +		return ret;
> +
>   	return typec_mux_set(port->mux, &state);
>   }
>   EXPORT_SYMBOL_GPL(typec_set_mode);
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>