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Date: Tue, 26 Mar 2024 15:09:19 -0700
From: Bjorn Andersson <quic_bjorande@quicinc.com>
To: <neil.armstrong@linaro.org>
CC: Jameson Thies <jthies@google.com>, <heikki.krogerus@linux.intel.com>,
        <linux-usb@vger.kernel.org>, <pmalani@chromium.org>,
        <bleung@google.com>, <abhishekpandit@chromium.org>,
        <andersson@kernel.org>, <dmitry.baryshkov@linaro.org>,
        <fabrice.gasnier@foss.st.com>, <gregkh@linuxfoundation.org>,
        <hdegoede@redhat.com>, <rajaram.regupathy@intel.com>,
        <saranya.gopal@intel.com>, <linux-kernel@vger.kernel.org>,
        Benson Leung <bleung@chromium.org>,
        Linux
 regressions mailing list <regressions@lists.linux.dev>
Subject: Re: [PATCH v4 2/4] usb: typec: ucsi: Register cables based on
 GET_CABLE_PROPERTY
Message-ID: <20240326220919.GA2136359@hu-bjorande-lv.qualcomm.com>
References: <20240305025804.1290919-1-jthies@google.com>
 <20240305025804.1290919-3-jthies@google.com>
 <44e8142f-d9b3-487b-83fe-39deadddb492@linaro.org>
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In-Reply-To: <44e8142f-d9b3-487b-83fe-39deadddb492@linaro.org>

On Mon, Mar 11, 2024 at 06:28:41PM +0100, neil.armstrong@linaro.org wrote:
> On 05/03/2024 03:58, Jameson Thies wrote:
[..]
> With:
> =================><====================================
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index cf52cb34d285..eec64a4c8cdd 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -1189,8 +1189,10 @@ static void ucsi_handle_connector_change(struct work_struct *work)
>                         ucsi_register_partner(con);
>                         ucsi_partner_task(con, ucsi_check_connection, 1, HZ);
>                         ucsi_partner_task(con, ucsi_check_connector_capability, 1, HZ);
> -                       ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ);
> -                       ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
> +                       if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE)
> +                               ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ);
> +                       if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS)
> +                               ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
> 
>                         if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
>                             UCSI_CONSTAT_PWR_OPMODE_PD)
> @@ -1589,8 +1591,10 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
>                 ucsi_register_partner(con);
>                 ucsi_pwr_opmode_change(con);
>                 ucsi_port_psy_changed(con);
> -               ucsi_get_partner_identity(con);
> -               ucsi_check_cable(con);
> +               if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE)
> +                       ucsi_get_partner_identity(con);
> +               if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS)
> +                       ucsi_check_cable(con);
>         }
> 
>         /* Only notify USB controller if partner supports USB data */
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 32daf5f58650..2e9c35a3af27 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -215,6 +215,7 @@ struct ucsi_capability {
>  #define UCSI_CAP_CABLE_DETAILS                 BIT(5)
>  #define UCSI_CAP_EXT_SUPPLY_NOTIFICATIONS      BIT(6)
>  #define UCSI_CAP_PD_RESET                      BIT(7)
> +#define UCSI_CAP_GET_PD_MESSAGE                        BIT(8)
>         u16 reserved_1;
>         u8 num_alt_modes;
>         u8 reserved_2;
> =================><====================================
> it works fine again.
> 

The series broke role switching on qcs6490-rb3gen2 (next-20240326 is
broken). You're proposed addition brings it back, thank you.

Was this posted somewhere?

Regards,
Bjorn