From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbgbr2.qq.com (smtpbgbr2.qq.com [54.207.22.56]) (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 38512285068; Thu, 23 Oct 2025 03:30:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.207.22.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761190249; cv=none; b=lHq1037uL9W21yaM6+276PDQ7rbAF/OOhg+eYOQxT7kwvGFjYwpbv5bTJU62zYDpZfyPKJH2ok/ahImkniCwthgd9fVj18Qbtv76LBj+kXJOSkDCE66bhTugtlao47PXx084Ea6RAETUvWfug8Yy4VK3fHl1/eiYkIkWRlOg5T0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761190249; c=relaxed/simple; bh=VHSKA2HFsM9+jjFn1th+KI+Eh4o3xbpE+Vm5UfGT46M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=XCb6JHGmjROeopiXYi8zhUowrfYkaAXD2QI3U2ihxlSZeHL7pvrDqYhV6IsxCCOQgvO1Ny+9esxkKEAJHgj/XWYU1N6/0O9EEaR5UfZ9IbUXUHdr5cf9sNWtD9jSrb8LXkFqFR3PvSC3ukfShfHm0DAwYdyUQVK+Ov9hsr5KaxE= 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=MwLUmf+3; arc=none smtp.client-ip=54.207.22.56 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="MwLUmf+3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1761190233; bh=umNcsJfQXn20u9b8R1M4KUZg1ShG0gK3GbHIbkBThtI=; h=From:To:Subject:Date:Message-Id; b=MwLUmf+3pzxQlqz4BrDaSHKcO9RAwqTN37VcC0aXAKuCMe0V7SdYi/cFW1sRZDSq5 70HRPNkKQximP0blccbtS5DXJYq8ZvMGcJBAILr558//gjN5Jpx4grspWewYzqmniA NYjiPC0RnffTQDDAa2EeF3l/IawPGuG0Fs2lv7ms= 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: NnBlO8MsmACrRff/5IWYDaIQTK4DFXaQ5BnoS49ejtsHa/YxDQozcHtW SO63juFZzQNTY+0VDQW80JJ/wYCk3WZV0pLO9DVDvsuNz/H1lRtyjHW949kdIM4Bx99jK2I 0cnEU7rPenJAGexVSF4tOtwoVo0NNFR/xhRNUoflCEcGf2AjeJUtGaz4zsiTccYbrbTsfv0 mxl+khhMnER0kSZuqkK9tnQLvB3Uoi1apZ7wLkC/Y9rOBehhYRkT/32veUeM2zOGa6hYUll 57AvRaGwDOEZ+PypjUZsZQ/rLRyCjXDBJJkfJjijOjELAuasfwCFbf1tfmhKQB0sOpWyrgR 45ZXwEk53lWEIlxaPf8972lZOwJIUKf8OO3ox/6VOVNaCs2XFWXU9q0TDm6Zs2X+X+ZJ8Yk 14L/q+Ppu6UTe7mbDGH9knJ/4DOZC48jlvKYaIMvs+JoWxz6oHTemc3869P3VZO+bCrWB7Q WGPC2oXdcFrHy9ojI/jhIDHbDUbCzvpWBDgtW+GADRZSaz1+yxH5R3hw8/JuTpypEiydm9i Or9role98SeDxq370CtAZ5lqmRLcGWLvTlBWdgJT45X4KnSRaui+y4CUZO1KVTbbbJPYo7W pL2pMfzPSr9JtsyvsNADIEXEkzWby9HWfJWrIEZ8SzCDqlzLFyvvWt1/SLkim+LOcvjzmPz /GTBg/Bu29z/GEkD+blRdLPg3t3wZW9X+6r9+aeKIU1wVbbwJ1GOun/5HZvzav4MzTbrAPW 86FjAvndathwdB8K4oX+sTseiSuwJzFmiEqgy02syrNeujp44ARPwZmzlcA8owJpGiomfpf 3iPEanbf7lDUOctgLDxS/hF1E74AFC5GVyNufw4mwclolyIL6VEU0L1FNGI0Du/QGDHy5Tp QN0xETc4FPXz68UbmqJ3MaWk3S7jYhmdSFdUGjL1dQZcTFm69OWOaQskCPo9xWYDiJnpW7H FqyTlCQ2V6QetgCgUb8YUym1gZTkdiYrgIQKMF7CquF1PQ1yp/Y9gliKIVKTqN13NroPDId x7OlIU/DWl4fSHRJBBBBnlkNMvO5E= X-QQ-XMRINFO: NI4Ajvh11aEj8Xl/2s1/T8w= X-QQ-RECHKSPAM: 0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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