linux-kernel - Re: [PATCH v2 3/8] usb: typec: intel_pmc_mux: Configure Thunderbolt cable generation bits

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Message-ID: <20201117104518.GC3437448@kuha.fi.intel.com>
Date:   Tue, 17 Nov 2020 12:45:18 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Utkarsh Patel <utkarsh.h.patel@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        pmalani@...omium.org, enric.balletbo@...labora.com,
        rajmohan.mani@...el.com, azhar.shaikh@...el.com
Subject: Re: [PATCH v2 3/8] usb: typec: intel_pmc_mux: Configure Thunderbolt
 cable generation bits

On Fri, Nov 13, 2020 at 12:24:58PM -0800, Utkarsh Patel wrote:
> Thunderbolt cable generation bits received as a part of Thunderbolt 3 cable
> discover mode VDO needs to be configured for Thunderbolt rounded and
> non-rounded cable support in the Thunderbolt alternate mode.
> 
> Signed-off-by: Utkarsh Patel <utkarsh.h.patel@...el.com>

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

> --
> Changes in v2:
> - No change.
> --
> ---
>  drivers/usb/typec/mux/intel_pmc_mux.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
> index d7f63b74c6b1..aa3211f1c4c3 100644
> --- a/drivers/usb/typec/mux/intel_pmc_mux.c
> +++ b/drivers/usb/typec/mux/intel_pmc_mux.c
> @@ -256,6 +256,7 @@ static int
>  pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state)
>  {
>  	struct typec_thunderbolt_data *data = state->data;
> +	u8 cable_rounded = TBT_CABLE_ROUNDED_SUPPORT(data->cable_mode);
>  	u8 cable_speed = TBT_CABLE_SPEED(data->cable_mode);
>  	struct altmode_req req = { };
>  
> @@ -284,6 +285,8 @@ pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state)
>  
>  	req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed);
>  
> +	req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(cable_rounded);
> +
>  	return pmc_usb_command(port, (void *)&req, sizeof(req));
>  }
>  
> -- 
> 2.17.1

-- 
heikki