From nobody Tue Dec 2 02:31:41 2025 Received: from smtpbgjp3.qq.com (smtpbgjp3.qq.com [54.92.39.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 82EA82D193C; Thu, 20 Nov 2025 02:24:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.92.39.34 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763605456; cv=none; b=Q2nH3CkfLUTT76eYm0v0D5mIfaxMUEi2gb1+DF/BCo8FXUJnzdJlzRN8/SspfvYmpsFROl5dgfqTxbzw4REU65iASPBG04oCxMFuLyFwcmDTPCvSnNddfC7IKEb8W4jEDIa8I0oU7S1fTU2dnp0fKokjU0/ZCYAyUF3WlyY9l6k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763605456; c=relaxed/simple; bh=+93XFzrsl+Mlsx9c1Lxbv/o1PQtmB/e2le8mDGU24DQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=HwF5iV8PMuhfR7evnEhFFGCLQ2jjiLEA0ifKBbKlKu6BMMYIBsbMicDr03R/Zrl2/cn/NFBJ0NWK2ERrwX1Pnus/d+WaRzj18lazz9ctTHM81spiF9I5MbVRemAyShDUfQv4WuBV7VfnSB9zjlnbr+SD63fhocWQLVwwvWsgfjs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com; spf=pass smtp.mailfrom=airkyi.com; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b=BlVMdBy7; arc=none smtp.client-ip=54.92.39.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=airkyi.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b="BlVMdBy7" 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: MoggEQ/w056c0cwQrknoff/OaUSA1S9PH5HvzFRlhm7bmZvqKQPxLx0s WlTnwqNj4afJEQy2fBzULBeAVDH57xZwNy/KAukcpfRaIU3GYzpkj0Xl/bZDYcIKnUvcF/i hBDL77acA/lGqK61QOA/ts+G/UJmW1WiLfh8r4Va/KuaDOIjf6zv5jQQRDBWHwL2e2k5SVl 6AprX/44Nrs2N4OhxWJHJe5KrDCzTF6gLZNPyIe4wnZObBkhQMMjhvfJDv4cSWpljofqHHs mYhZiFmKZxpxo01iwzMnU0YGGfoj9+gr5+pGHla70VTx9lkqRy/d4TuMuB8XWCT18i/SC8A s19MAI8/etgc4rWe9seKXSqq6ZEc7Tg236qyPyJjO9eTCb0HB7BPgLYJ3z+gVDfpknaW53n QzVqCnKbROb7pnyIUCmmoz7vFrMcsruBIH1lEdbMkGg5vcfa9eBFbNpqKMd7TAcwmirTmy5 Ym9xFjChnwj4RsuW5xzzPmWPn8XCq3oez67ET3oxnlJ+RsabeakvzkU4tfAbWWtNbxITtMG h1+YCT9fC09vw1uUa3WuOuAekdkx7dX52Xf7xqhBKjijD8uyxc/NFWcvxK4B6N4N58OXfLY oUKtFPeui3ii3xcWqmoZ/vroRUMxCbW5tU4T2sY0XPmpYByeo1OhBQQ8AkSqHNnVHJKVZQq WQ93YHSykXRfRNbkDnMcGOlmpL+FwIy3IcpwlMlL7XY+KUulClGUgLCVl1seEBIl205V4zh bUyDJ1wIEtaiTAj+PL+ci/MwKukDQ83NrC+YCo6A+xg9zyIArin2dueXuU7VWg3uyp3lhMQ T/4R7JaoWm+yy5SKuycKISWPnVYReOToozYkgbIHuuVglMU2xp+RRCgX/Vq3vy4T0u3m/cr P2HwYF4IcXtFwEFJ+BG6EBaLv8qnkCBHYDjWWGWDcmi5Qf1lP9kDPzBPjD7sbhq0q6OGNOA mxb8y+f3lqaonwFg2UFTIsMQjS07FbkOm5eGVjqnP8WF/TAwrkMt9MOaiZ8UtDe3qyE3VwC ZfMtD//Q== X-QQ-XMRINFO: NS+P29fieYNw95Bth2bWPxk= X-QQ-RECHKSPAM: 0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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.=20 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-$(CONFIG_TYPEC) +=3D typec.o -typec-y :=3D class.o mux.o bus.o pd.o retimer.o +typec-y :=3D class.o mux.o notify.o bus.o pd.o retimer.o typec-$(CONFIG_ACPI) +=3D port-mapper.o obj-$(CONFIG_TYPEC) +=3D altmodes/ obj-$(CONFIG_TYPEC_TCPM) +=3D 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]; }; =20 +void typec_notify_event(unsigned long event, void *data); + #define to_altmode(d) container_of(d, struct altmode, adev) =20 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); } =20 + typec_notify_event(TYPEC_ALTMODE_REGISTERED, &alt->adev); + return &alt->adev; } =20 @@ -614,6 +616,7 @@ void typec_unregister_altmode(struct typec_altmode *ade= v) { 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_al= tmode.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 =20 struct typec_altmode_ops; +struct notifier_block; =20 /** * 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); =20 +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 --=20 2.51.1