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[35.247.103.198]) by smtp.gmail.com with UTF8SMTPSA id 41be03b00d2f7-7f41f65bf87sm1827097a12.70.2024.11.07.11.31.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 07 Nov 2024 11:31:44 -0800 (PST) From: Abhishek Pandit-Subedi To: heikki.krogerus@linux.intel.com, tzungbi@kernel.org, linux-usb@vger.kernel.org, chrome-platform@lists.linux.dev Cc: jthies@google.com, akuchynski@google.com, pmalani@chromium.org, dmitry.baryshkov@linaro.org, Abhishek Pandit-Subedi , Greg Kroah-Hartman , linux-kernel@vger.kernel.org Subject: [PATCH v3 3/7] usb: typec: Check port is active before enter mode on probe Date: Thu, 7 Nov 2024 11:29:56 -0800 Message-ID: <20241107112955.v3.3.I439cffc7bf76d94f5850eb85980f1197c4f9154c@changeid> X-Mailer: git-send-email 2.47.0.277.g8800431eea-goog In-Reply-To: <20241107193021.2690050-1-abhishekpandit@chromium.org> References: <20241107193021.2690050-1-abhishekpandit@chromium.org> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Enforce the same requirement as when we attempt to activate altmode via sysfs (do not enter partner mode if port mode is not active). In order to set a default value for this field, also introduce the inactive field in struct typec_altmode_desc. Signed-off-by: Abhishek Pandit-Subedi Reviewed-by: Heikki Krogerus --- Changes in v3: - Use port.active instead of introducing auto-enter field - Introduce inactive field to typec_altmode_desc to set default value for active. - Always make port 'active' field writable drivers/usb/typec/altmodes/displayport.c | 7 +++++-- drivers/usb/typec/altmodes/thunderbolt.c | 6 +++++- drivers/usb/typec/class.c | 5 +++-- include/linux/usb/typec.h | 2 ++ 4 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c index 3245e03d59e6..f4116e96f6a1 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -767,8 +767,11 @@ int dp_altmode_probe(struct typec_altmode *alt) if (plug) typec_altmode_set_drvdata(plug, dp); - dp->state = plug ? DP_STATE_ENTER_PRIME : DP_STATE_ENTER; - schedule_work(&dp->work); + /* Only attempt to enter altmode if port is active. */ + if (port->active) { + dp->state = plug ? DP_STATE_ENTER_PRIME : DP_STATE_ENTER; + schedule_work(&dp->work); + } return 0; } diff --git a/drivers/usb/typec/altmodes/thunderbolt.c b/drivers/usb/typec/altmodes/thunderbolt.c index a945b9d35a1d..45567abc3bb8 100644 --- a/drivers/usb/typec/altmodes/thunderbolt.c +++ b/drivers/usb/typec/altmodes/thunderbolt.c @@ -212,6 +212,7 @@ static const struct typec_altmode_ops tbt_altmode_ops = { static int tbt_altmode_probe(struct typec_altmode *alt) { + const struct typec_altmode *port = typec_altmode_get_partner(alt); struct tbt_altmode *tbt; tbt = devm_kzalloc(&alt->dev, sizeof(*tbt), GFP_KERNEL); @@ -226,7 +227,10 @@ static int tbt_altmode_probe(struct typec_altmode *alt) typec_altmode_set_drvdata(alt, tbt); typec_altmode_set_ops(alt, &tbt_altmode_ops); - if (tbt_ready(alt)) { + /* Only attempt to enter altmode if port is active and cable/plug + * information is ready. + */ + if (port->active && tbt_ready(alt)) { if (tbt->plug[TYPEC_PLUG_SOP_PP]) tbt->state = TBT_STATE_SOP_PP_ENTER; else if (tbt->plug[TYPEC_PLUG_SOP_P]) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index febe453b96be..b5e67a57762c 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -458,7 +458,8 @@ static umode_t typec_altmode_attr_is_visible(struct kobject *kobj, struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj)); if (attr == &dev_attr_active.attr) - if (!adev->ops || !adev->ops->activate) + if (!is_typec_port(adev->dev.parent) && + (!adev->ops || !adev->ops->activate)) return 0444; return attr->mode; @@ -563,7 +564,7 @@ typec_register_altmode(struct device *parent, if (is_port) { alt->attrs[3] = &dev_attr_supported_roles.attr; - alt->adev.active = true; /* Enabled by default */ + alt->adev.active = !desc->inactive; /* Enabled by default */ } sprintf(alt->group_name, "mode%d", desc->mode); diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h index d616b8807000..56c01771c190 100644 --- a/include/linux/usb/typec.h +++ b/include/linux/usb/typec.h @@ -140,6 +140,7 @@ int typec_cable_set_identity(struct typec_cable *cable); * @mode: Index of the Mode * @vdo: VDO returned by Discover Modes USB PD command * @roles: Only for ports. DRP if the mode is available in both roles + * @inactive: Only for ports. Make this port inactive (default is active). * * Description of an Alternate Mode which a connector, cable plug or partner * supports. @@ -150,6 +151,7 @@ struct typec_altmode_desc { u32 vdo; /* Only used with ports */ enum typec_port_data roles; + bool inactive : 1; }; void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision);