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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 76430CCD1AB for ; Thu, 23 Oct 2025 03:37:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CFD0A10E2E2; Thu, 23 Oct 2025 03:37:54 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=airkyi.com header.i=@airkyi.com header.b="P3s159fK"; dkim-atps=neutral X-Greylist: delayed 393 seconds by postgrey-1.36 at gabe; Thu, 23 Oct 2025 03:37:52 UTC Received: from smtpbguseast3.qq.com (smtpbguseast3.qq.com [54.243.244.52]) by gabe.freedesktop.org (Postfix) with ESMTPS id F268010E2E2 for ; Thu, 23 Oct 2025 03:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1761190665; bh=umNcsJfQXn20u9b8R1M4KUZg1ShG0gK3GbHIbkBThtI=; h=From:To:Subject:Date:Message-Id; b=P3s159fKatwQlWqFi19fsOSI2VK0oYAMRwvOzTzK9C2Jc69dEj4EqhT+sMpFgQfV3 MLb7zcbNUI2B/e3Nx2aLR//hjv87gLTOIw/qGDn5hZJ0MsULzsm0ZUpc0jUZdDP13N Tg+/xxa1ZcO7/HEubMh6HtQu1dmtk3LGbyooEIa4= X-QQ-mid: esmtpsz16t1761190231tebd0ea05 X-QQ-Originating-IP: lmB1WZeKvtf5VM4hJL0jYLeppT9A2VeZOLIbFh5pRJk= Received: from DESKTOP-8BT1A2O.localdomain ( [58.22.7.114]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 23 Oct 2025 11:30:27 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 18264625426006429648 From: Chaoyi Chen To: Heikki Krogerus , Greg Kroah-Hartman , Dmitry Baryshkov , 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 v7 2/9] drm/bridge: Implement generic USB Type-C DP HPD bridge Date: Thu, 23 Oct 2025 11:30:02 +0800 Message-Id: <20251023033009.90-3-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251023033009.90-1-kernel@airkyi.com> References: <20251023033009.90-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:airkyi.com:qybglogicsvrsz:qybglogicsvrsz4a-0 X-QQ-XMAILINFO: NT9b64/RmY6NGAK1f+8S/ucoRZgVjT7UPTOnYRzrt+XurTC7dL2FI/ZL on7RBawxhnvJlLxp28tkxakUpdH1fJ53WADnUZk0yYETyYyw2XUFejz5QuSzDAU6wgKw0ET 0APH6BBYFTFtcLq1KYYMAXq5I1gYId7pBCWhk2ykjShX8nZoghcQurLSzlyFQgItuPwekKn M3kfzziZJV9e6jJdwOBdxnrUmIcGzBgLYnqfLgJfBa9zMUEUa74XsXb+O09Ag+6ITlAEy0p 2WzshmkdSbUVFQEuSSq+u6F1lICFPyWJ3XHa/uXd4jtnN+D42NSup+ipWsNix0uTEW8Gaha C91tC3hM1LwMv69REGJaqQD8lp2e11Rbn8V0a3ZZwWHXiC6SIlogrSGxEa6Vx0Ho/mXOo0t +qioC6SNApjrGbnQES4rdCJRKEsnuxc2ms905UbWgNsmiKfySn29Me21Z89devhgMZv9ey0 iNhhidMT293tgWRHq7MOkHyagZrgMXrU9kG4Bvgovuwf2WSQ5fpELbYz4CRRQex8xsRlVHD 8vIV1hlpCQw1ZDqOZ3W7FQuBOR16qtvpTBbvLjNfHDCS/DwxewsUfrBvwvMIGC0GgtSM9dI m9zG3mvbiuV47c61YTbaY7R121ibDRrbDV7nguNyfJItymRPkqZQXjndpJ9cg8TcK6inQia zeL4z4/HHSmqfwysz3wCd//a2z4dL2+sh3kRg82DiMG0REBmQE48gj4OWtFvsJ7tAfmOF3C g1amBBcSWiH4ZtGBfxCcElleh4ulYzgcca7cydtGeqTbRsDOHbfAvwnTDc2wZ3ey5Bj5Paj Q2s6XYqzTZqx2NdaIVkDMUTLmJJ2fnOlXvyGWPjlg+C+jnxPt8ztttQf0d/9iTBdVu0sAuY fAXHF5FZjoMI/+gx/lMtu1otEqEFY8fx64ETSd9jzndJlOYExhmE0PMaYjjhoakNNao3wwW eE04jgkNINGsveGN9Wg7I2gw9FLxm80Ihbr/sATDja492q1s1RZcUFHtkodFPyun6wvjyX2 p9qxL7/938VlyixuC0SbIfd4I/AB4= X-QQ-XMRINFO: NS+P29fieYNw95Bth2bWPxk= X-QQ-RECHKSPAM: 0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Chaoyi Chen Several USB-C controller drivers have already implemented the DP HPD bridge function provided by aux-hpd-bridge.c, but there are still some USB-C controller driver that have not yet implemented it. This patch implements a generic DP HPD bridge based on aux-hpd-bridge.c, so that other USB-C controller drivers don't need to implement it again. Signed-off-by: Chaoyi Chen --- drivers/gpu/drm/bridge/Kconfig | 11 ++++ drivers/gpu/drm/bridge/Makefile | 1 + .../gpu/drm/bridge/aux-hpd-typec-dp-bridge.c | 51 +++++++++++++++++++ 3 files changed, 63 insertions(+) create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index b9e0ca85226a..9f31540d3ad8 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -33,6 +33,17 @@ config DRM_AUX_HPD_BRIDGE menu "Display Interface Bridges" depends on DRM && DRM_BRIDGE +config DRM_AUX_TYPEC_DP_HPD_BRIDGE + tristate "TypeC DP HPD bridge" + depends on DRM_BRIDGE && OF && TYPEC + select DRM_AUX_HPD_BRIDGE + help + Simple USB Type-C DP bridge that terminates the bridge chain and + provides HPD support. + + If the USB-C controller driver has not implemented this and you need + the DP HPD support, say "Y" or "m" here. + config DRM_CHIPONE_ICN6211 tristate "Chipone ICN6211 MIPI-DSI/RGB Converter bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 245e8a27e3fc..e91736829167 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_DRM_AUX_BRIDGE) += aux-bridge.o obj-$(CONFIG_DRM_AUX_HPD_BRIDGE) += aux-hpd-bridge.o +obj-$(CONFIG_DRM_AUX_TYPEC_DP_HPD_BRIDGE) += aux-hpd-typec-dp-bridge.o obj-$(CONFIG_DRM_CHIPONE_ICN6211) += chipone-icn6211.o obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o obj-$(CONFIG_DRM_CROS_EC_ANX7688) += cros-ec-anx7688.o diff --git a/drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c b/drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c new file mode 100644 index 000000000000..2235b7438fe9 --- /dev/null +++ b/drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0+ +#include +#include +#include +#include + +#include + +static int drm_typec_bus_event(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct typec_altmode *alt = (struct typec_altmode *)data; + + if (action != TYPEC_ALTMODE_REGISTERED) + goto done; + + if (alt->svid != USB_TYPEC_DP_SID) + goto done; + + /* + * alt->dev.parent->parent : USB-C controller device + * alt->dev.parent : USB-C connector device + */ + drm_dp_hpd_bridge_register(alt->dev.parent->parent, + to_of_node(alt->dev.parent->fwnode)); + +done: + return NOTIFY_OK; +} + +static struct notifier_block drm_typec_event_nb = { + .notifier_call = drm_typec_bus_event, +}; + +static void drm_aux_hpd_typec_dp_bridge_module_exit(void) +{ + typec_unregister_notify(&drm_typec_event_nb); +} + +static int __init drm_aux_hpd_typec_dp_bridge_module_init(void) +{ + typec_register_notify(&drm_typec_event_nb); + + return 0; +} + +module_init(drm_aux_hpd_typec_dp_bridge_module_init); +module_exit(drm_aux_hpd_typec_dp_bridge_module_exit); + +MODULE_DESCRIPTION("DRM TYPEC DP HPD BRIDGE"); +MODULE_LICENSE("GPL"); -- 2.49.0