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[34.91.247.37]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91a21c0f4sm2614772466b.106.2025.08.14.11.45.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Aug 2025 11:45:01 -0700 (PDT) From: Andrei Kuchynski To: Heikki Krogerus , Abhishek Pandit-Subedi , Benson Leung , Jameson Thies , Tzung-Bi Shih , linux-usb@vger.kernel.org, chrome-platform@lists.linux.dev Cc: Guenter Roeck , Greg Kroah-Hartman , Dmitry Baryshkov , "Christian A. Ehrhardt" , Venkat Jayaraman , linux-kernel@vger.kernel.org, Andrei Kuchynski Subject: [PATCH v1 1/5] usb: typec: Add alt_mode_override field to port property Date: Thu, 14 Aug 2025 18:44:51 +0000 Message-ID: <20250814184455.723170-2-akuchynski@chromium.org> X-Mailer: git-send-email 2.51.0.rc1.163.g2494970778-goog In-Reply-To: <20250814184455.723170-1-akuchynski@chromium.org> References: <20250814184455.723170-1-akuchynski@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This new field in the port properties dictates whether the Platform Policy Manager (PPM) allows the OS Policy Manager (OPM) to change the currently active, negotiated alternate mode. Signed-off-by: Andrei Kuchynski --- drivers/usb/typec/class.c | 14 +++++++++++--- drivers/usb/typec/class.h | 2 ++ include/linux/usb/typec.h | 1 + 3 files changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 67a533e35150..a72325ff099a 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -459,9 +459,16 @@ static umode_t typec_altmode_attr_is_visible(struct ko= bject *kobj, struct typec_altmode *adev =3D to_typec_altmode(kobj_to_dev(kobj)); =20 if (attr =3D=3D &dev_attr_active.attr) - if (!is_typec_port(adev->dev.parent) && - (!adev->ops || !adev->ops->activate)) - return 0444; + if (!is_typec_port(adev->dev.parent)) { + struct typec_partner *partner =3D + to_typec_partner(adev->dev.parent); + struct typec_port *port =3D + to_typec_port(partner->dev.parent); + + if (!port->alt_mode_override || !adev->ops || + !adev->ops->activate) + return 0444; + } =20 return attr->mode; } @@ -2681,6 +2688,7 @@ struct typec_port *typec_register_port(struct device = *parent, } =20 port->pd =3D cap->pd; + port->alt_mode_override =3D cap->alt_mode_override; =20 ret =3D device_add(&port->dev); if (ret) { diff --git a/drivers/usb/typec/class.h b/drivers/usb/typec/class.h index db2fe96c48ff..f05d9201c233 100644 --- a/drivers/usb/typec/class.h +++ b/drivers/usb/typec/class.h @@ -80,6 +80,8 @@ struct typec_port { */ struct device *usb2_dev; struct device *usb3_dev; + + bool alt_mode_override; }; =20 #define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev) diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h index 252af3f77039..6e09e68788dd 100644 --- a/include/linux/usb/typec.h +++ b/include/linux/usb/typec.h @@ -304,6 +304,7 @@ struct typec_capability { enum typec_accessory accessory[TYPEC_MAX_ACCESSORY]; unsigned int orientation_aware:1; u8 usb_capability; + bool alt_mode_override; =20 struct fwnode_handle *fwnode; void *driver_data; --=20 2.51.0.rc0.215.g125493bb4a-goog