From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2CD00CF64A6 for ; Thu, 20 Nov 2025 02:24:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=j1djG2TFE/CUEyP0COdHWqSO/caFFOIst9KD5pPTwfU=; b=eXz0IgtAw2Aqfe8WNl5CuMBzNR z++HcaYCEDBzmUA7lgecT0L2vrk7ODyjUu63hvY2B4HDbxC1cJz3in7ORB7oEQyufHzBBv24316dx JPVU7OwcEz7FfrDi+/N2j3fp7M0g8MfXzXg9j474aq4LCF1fj7IpIylyf9eFEdvckWuL5TBT/GZKx 1/EyJ36Anest+FW5cGO8+E/qwZeUAFFppF5CWS2+UqzWw0ud4mH1rfslKxeG+Lhy+QtxeT/DPd3FX lMQcvka9vGS1WhiAvJ9+wUu1KEYb+R1iYnQWrvyrFzYSBtuFf8edMqPvBwT/bZMH56vHPeyjAUv3h Y0oUFanQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLuLq-00000005yNe-3aaF; Thu, 20 Nov 2025 02:24:50 +0000 Received: from smtpbgeu1.qq.com ([52.59.177.22]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vLuLh-00000005yH9-1HRt; Thu, 20 Nov 2025 02:24:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1763605438; bh=j1djG2TFE/CUEyP0COdHWqSO/caFFOIst9KD5pPTwfU=; h=From:To:Subject:Date:Message-Id; b=BlVMdBy7Ltf441wLnCmm0AVUXNNXTZ3ZWlUIy4BNh3+xUzTTU2XbgXzBhTOBz7Wu2 ZpmUgkC19gH5rdC/0MfNQkHGjckdTMbO3qRrVnu2uO31Op6KBfZ97G1rG2UTs6Kv8d LobSEOUIwcV8KY6HToIkSajUDgB+GenvllqlBB88= X-QQ-mid: zesmtpsz5t1763605436tb3e0b544 X-QQ-Originating-IP: xlc9ysITpbSHXMdJexYj64rNZJQOqI/N1w8Cl7S5hso= Received: from DESKTOP-8BT1A2O.localdomain ( [58.22.7.114]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 20 Nov 2025 10:23:53 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 17663910937081771390 From: Chaoyi Chen To: Heikki Krogerus , Greg Kroah-Hartman , Dmitry Baryshkov , Peter Chen , Luca Ceresoli , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Sandy Huang , Andy Yan , Yubing Zhang , Frank Wang , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Amit Sunil Dhamne , Chaoyi Chen , Dragan Simic , Johan Jonker , Diederik de Haas , Peter Robinson Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org Subject: [PATCH v10 01/11] usb: typec: Add notifier functions Date: Thu, 20 Nov 2025 10:23:33 +0800 Message-Id: <20251120022343.250-2-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251120022343.250-1-kernel@airkyi.com> References: <20251120022343.250-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: OeWvpHj3+EsSv9xKSW9oV9ok1IEWWBRVoxF+28Qa+4hqt4fjLvBEJEKx v12u7Dg1aEMKBJLHFOyL9ZDXKwpSAoy5+Cgs6tCv2TfdfbjfBt5FStLDN/f6t41HDfeZK2Z Zo83614Y7R7P7aCzf9/cbznW+KFNgQ/OB5Ew/DZSY/gRdqaE6clzx1iSiZvKkzQXXRjG2eX TVR+fz4Iz0KVtqj/shfyJT+HfMIsXCPBQj9AcSVf4C7ceVrarxsYDELwdyZQMJK/40yGXgh HHUeXLN+GruVkt6/hqv2ZLY5lzAOAJZzP6+uyU1Cl9WvliSN5vtiPCAFKkJFBDyUCtH5joR DkGrTn9Dl6XmpnaGr+TaEBAWe+Fvjck3CyU0qPdDFuyNHjfML7/08PzLavZYk7KIuLCGDv0 +6O4cd6XYafGlkFgn+GhMuxdv9ijD81pobFfb8gXrdUut2LkGAWBe8Ghi++huV3MLmLuu19 nEsgrd+np/rgplqKyPaXftNNMxko2+TLCAwepwSGLeBxy/pYB8+dFquAWG2+OtCIKdnlWgd AV3NXxANYqbkanz+YWLIU5fz2OtRIrDBpqwHf0Ku0oKeOmVS1YVQS3scrD4KyET1fKdgLGU ouKGw1tRnIU9Cr6lRsSw/O0Ch5myL9SZjA9hm1khx1186KuXQAFYZ2p7Dcn5MBEXOZXl8kb J8DcsNJJm++9kqltJdT8hHMlgpQHxaRePZbFwGQADhRVwlPlkX7vkQH/ncFLRWkFJVZln+K Q1hYwWwXx2LIBG0JzoDwOfJ+X5RfW4LnI+UHUgd3ciZdZcGramjaeIXnEGJsDG0PTx5K7qM 4NVOULjH0yPP4pOLEkmERoqJQ92prHflJwg5eoC0vXdDOeyMU+tuNds/nSODbh9keiBQTi3 /eZ6P7xS+Vz/aC0fRLf1NYh9L7QPM49MqQ9icpbxA8s9BXatC2LDOF32V2hDvVohegwfzU4 I10NGddqLhPWzgahsk8S1wZoInwm4h/uWzrEB/gKFqkuErIVth14IqEaOKQhxvbLBIxr66a MiUjpgPQ== X-QQ-XMRINFO: MPJ6Tf5t3I/ycC2BItcBVIA= X-QQ-RECHKSPAM: 0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251119_182441_858464_98060035 X-CRM114-Status: GOOD ( 16.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Chaoyi Chen Some other part of kernel may want to know the event of typec bus. This patch add common notifier function to notify these event. Signed-off-by: Chaoyi Chen --- Changes in v10: - Notify TYPEC_ALTMODE_UNREGISTERED when altmode removed. Changes in v9: - Remove redundant header files. Changes in v8: - Fix coding style. drivers/usb/typec/Makefile | 2 +- drivers/usb/typec/bus.h | 2 ++ drivers/usb/typec/class.c | 3 +++ drivers/usb/typec/notify.c | 23 +++++++++++++++++++++++ include/linux/usb/typec_altmode.h | 9 +++++++++ 5 files changed, 38 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/typec/notify.c diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index 7a368fea61bc..20d09c5314d7 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_TYPEC) += typec.o -typec-y := class.o mux.o bus.o pd.o retimer.o +typec-y := class.o mux.o notify.o bus.o pd.o retimer.o typec-$(CONFIG_ACPI) += port-mapper.o obj-$(CONFIG_TYPEC) += altmodes/ obj-$(CONFIG_TYPEC_TCPM) += tcpm/ diff --git a/drivers/usb/typec/bus.h b/drivers/usb/typec/bus.h index 643b8c81786d..820b59b6d434 100644 --- a/drivers/usb/typec/bus.h +++ b/drivers/usb/typec/bus.h @@ -26,6 +26,8 @@ struct altmode { struct altmode *plug[2]; }; +void typec_notify_event(unsigned long event, void *data); + #define to_altmode(d) container_of(d, struct altmode, adev) extern const struct bus_type typec_bus; diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 9b2647cb199b..1ccf5385d559 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -600,6 +600,8 @@ typec_register_altmode(struct device *parent, return ERR_PTR(ret); } + typec_notify_event(TYPEC_ALTMODE_REGISTERED, &alt->adev); + return &alt->adev; } @@ -614,6 +616,7 @@ void typec_unregister_altmode(struct typec_altmode *adev) { if (IS_ERR_OR_NULL(adev)) return; + typec_notify_event(TYPEC_ALTMODE_UNREGISTERED, adev); typec_retimer_put(to_altmode(adev)->retimer); typec_mux_put(to_altmode(adev)->mux); device_unregister(&adev->dev); diff --git a/drivers/usb/typec/notify.c b/drivers/usb/typec/notify.c new file mode 100644 index 000000000000..9e50b54da359 --- /dev/null +++ b/drivers/usb/typec/notify.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +#include "bus.h" + +static BLOCKING_NOTIFIER_HEAD(typec_notifier_list); + +int typec_altmode_register_notify(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&typec_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(typec_altmode_register_notify); + +int typec_altmode_unregister_notify(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&typec_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(typec_altmode_unregister_notify); + +void typec_notify_event(unsigned long event, void *data) +{ + blocking_notifier_call_chain(&typec_notifier_list, event, data); +} diff --git a/include/linux/usb/typec_altmode.h b/include/linux/usb/typec_altmode.h index f7db3bd4c90e..59e20702504b 100644 --- a/include/linux/usb/typec_altmode.h +++ b/include/linux/usb/typec_altmode.h @@ -10,6 +10,7 @@ #define MODE_DISCOVERY_MAX 6 struct typec_altmode_ops; +struct notifier_block; /** * struct typec_altmode - USB Type-C alternate mode device @@ -77,6 +78,14 @@ int typec_altmode_notify(struct typec_altmode *altmode, unsigned long conf, const struct typec_altmode * typec_altmode_get_partner(struct typec_altmode *altmode); +enum usb_typec_event { + TYPEC_ALTMODE_REGISTERED, + TYPEC_ALTMODE_UNREGISTERED, +}; + +int typec_altmode_register_notify(struct notifier_block *nb); +int typec_altmode_unregister_notify(struct notifier_block *nb); + /** * struct typec_cable_ops - Cable alternate mode operations vector * @enter: Operations to be executed with Enter Mode Command -- 2.51.1