From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbg150.qq.com (smtpbg150.qq.com [18.132.163.193]) (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 352E532B10D for ; Tue, 4 Aug 2026 07:08:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.132.163.193 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785827301; cv=none; b=jXMdRW70xGz3eeWDIoVbVMFKHbwscOZDXZOG0I2HzZtessPSSw2WaQt0qhTc61lqHPVfW8GltC6YqY6+3oztNGegvABq9i+wGOD+ioOGTwlnG+Vr1Jb5yo1R3O0sgk0Iek5NUI6/sc6hnLZ5MBFCovvpzD7LdltBcy7vNH8gtsg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785827301; c=relaxed/simple; bh=bSmE2ONYONY6PelySDxsI3fuDO7TRzFX7ziiI2q4n+0=; h=From:To:Cc:Subject:Date:Message-Id; b=hMo33s4W27yNJQtWKk6CG5aV8HSGbtQdBbCWXrQAETSlMnM2Sq+q8xdZM1JJWFb7yOxQyCBt2HmDPK5b5ZbLrfKgTBnV4zRo9fkUJKUYvtTYwYLlIiRSiFN+woBI7p/ImwHXW07VPrqGk94RZh7LqsWJh/QbjCRw9TIygJ3GqmM= 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=Lok65yU8; arc=none smtp.client-ip=18.132.163.193 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="Lok65yU8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1785827274; bh=4uFCqu0p0pYyvP6VJhfQU8lFG2oyNVxdn8MamPTgQlc=; h=From:To:Subject:Date:Message-Id; b=Lok65yU8OspNFaSh+M6WOb6qQBc3d5DC8RTE6C0Feh97xM4bybDzEPScVnhMwTF+Q eI72lZXaLAlLHbgZhk8IKkVff/fqZh8MyjQOlBkr9LZvCXz+2+8S8+797JG01zDy8j RMeMRTcb/7a1sdrX+isu7M4S+M/DqPiDpcN6ZKY4= X-QQ-mid: esmtpsz19t1785827273t108231cc X-QQ-Originating-IP: oW8kOPLlM9qGybeiNyNpDJs4YNZHTBEyPC279s2oho8= Received: from DESKTOP-8BT1A2O.localdomain ( [61.154.14.86]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 04 Aug 2026 15:07:49 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 452998556394821966 From: Chaoyi Chen To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan , Vinod Koul , Chaoyi Chen , Sebastian Reichel , Nicolas Frattaroli , Heikki Krogerus Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-phy@lists.infradead.org Subject: [PATCH v6 0/7] drm/bridge: Implement generic USB Type-C DP HPD bridge Date: Tue, 4 Aug 2026 15:07:23 +0800 Message-Id: <20260804070730.68-1-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: NDgMZBR9sMma6b36KlPNgQikVbREZp3rrnCJakQjk9hOGlvAFb99cL6B oARmwX7uywM0ft+NVbd2JchUGP8d7ho+WUnF+vwdW4shPvOU7eY/ah1iEhxgfB3FPgZ1nJY 6AJHTmzmFsn5tT+AgWFr0Qobgy4CYOSO6tCe2GUrfrgAlEm3ZngCLH6mnY9HJ0UEujkM7lM nwiDP1spfyU+rlP23kXmlkv/Hyr4dRkFhnyefdFgZd/7kpfSjXPsAMrpXHyWMytnAyqHb0c xWStGNiHELIPVYlbsu7Q+uIqoI3EftsuzSvc4ziStVphu2sCqcB5NwIqYEIXvJz+Vfc2Fwq AxwI7u/jWB8jp8P5oS8tIdYacBgZw7VVjjJmsIT2kg0tRXT2M8MByJ9uK3YBPLvE+PfneSs BLeU7be0QswmYP49/9UThSihobeYs51i5owArURjf1GdApk/+LrQhwWYLuJgocxIN7wbGTv 2sCYTNmgpNqZ85rPz1oZGBmJRUaJHW/YBGyCuLMyc0VzCqCsm7PXgk9xnJ6Rqnh7OsFUtIj m4ayfLk2oxqvPH2h1rY1kM+a60l0T9zMdNfGj5MNktXRPUH0j6C6sTJTlKpGl0Use5+wBr7 RPHw5g5AuvHpV2+PYcW4VA5lk/eE3/34JqRguUw1SdCF+BQgZ11qW2SiPN40dFd6ChUZFbV 2yYaJw4rgMgo2sA9PuM4lDZ/mxqnUFNdcu/fmzamBYC6SlOooC+6x0uPrMV9sHPGGQEP6qX ZsvDcgv1+DeyU6rudy5xrOpulj4bMNRzwxoLmZShWvYZhcZZgIg8yFUrCFTmXhtvsWTWI4r zdjJrJz/ZlrgUGqgVXen2Fg5tqOqUaamktuAqWJclA34CqB2lw44d6ravrh5IWNaTZmgPc0 Jh6v8EI1d0L7Ifjha3SryIP0QctkTf4Nkytm/M/5KyLDmVyEgahMTzZBlhK99JRXeKQrsig pcpQvIfZX1QkM5U/Csw4t4hSS1As56qt8GlQ5n9eGyjlAq1fslio7aTYZCsfwVc6e+tW/tM zSSuqfeAeMxw4cK0d+E3rEbHyFrC07RbBNX4A4mRNPVitv/3hj X-QQ-XMRINFO: NS+P29fieYNwqS3WCnRCOn9D1NpZuCnCRA== X-QQ-RECHKSPAM: 0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: From: Chaoyi Chen This series is split from the v15 "Add Type-C DP support for RK3399 EVB IND board" series [1]. It focuses on the DRM bridge and Rockchip platform CDN-DP controller changes. [1] https://lore.kernel.org/all/20260304094152.92-1-kernel@airkyi.com/ ==== 1. Generic Type-C DP HPD bridge Currently, several USB-C controller drivers register their own DP HPD bridge via aux-hpd-bridge.c, each duplicating the same logic. For devicetree based platforms, the USB-C controller may vary across boards, and not every USB-C controller driver implements this feature. Patch 1 implements a generic DP HPD bridge that monitors Type-C bus events and automatically creates an HPD bridge when a Type-C port device with DP SVID is registered. 2. Multiple bridge model for CDN-DP The RK3399 has two USB/DP combo PHY and one CDN-DP controller. Patch 5 introduces a multi-bridge model where each PHY port gets a separate encoder and bridge, allowing flexible selection of the output PHY port. This is based on the DRM AUX HPD bridge rather than extcon. ==== Patch 1 adds new API to check whether a DisplayPort HPD bridge has already been registered(Sebastian). Patch 2 adds generic USB Type-C DP HPD bridge (Dmitry, Heikki). Patch 3 adds module soft depend for USB Type-C DP HPD bridge(Sebastian). Patch 4 adds new API drm_aux_bridge_register_from_node() (Neil). Patch 5 adds DRM AUX bridge support for RK3399 USBDP PHY (Neil). Patch 6 drops CDN-DP's extcon dependency when Type-C is present (Dmitry). Patch 7 adds multiple bridges to support PHY port selection (Dmitry, Luca). Changes in v6: - Link to v5: https://lore.kernel.org/all/20260730013349.51-1-kernel@airkyi.com/ - Avoid duplicate registration of the same DisplayPort HPD bridge. Changes in v5: - Link to v4: https://lore.kernel.org/all/20260727064408.101-1-kernel@airkyi.com/ - Add module soft depend for USB Type-C DP HPD bridge. Changes in v4: - Link to v3: https://lore.kernel.org/all/20260717072323.96-1-kernel@airkyi.com/ - Scan the entire typec_bus and attempt to register the hpd bridge, so as not to miss devices that were already added during initialization. Changes in v3: - Link to v2: https://lore.kernel.org/all/20260608070805.88-1-kernel@airkyi.com/ (Sorry, I forgot to add the "v2" title, so it looks like v1.) - Remove now-redundant call to drm_connector_attach_encoder() - Rebase to v7.2-rc2 Changes in v2: - Link to v1: https://lore.kernel.org/all/20260521032854.103-1-kernel@airkyi.com/ - Add copyright text. - Remove useless goto. - Fix incorrect function names in the documentation comments. - Fix the check logic for dp->active_port (0 is valid). - Fix the uninitialized prev_port. - Remove duplicate logic from cdn_dp_switch_port(). - Fix the prototype of cdn_dp_bridge_hpd_notify(). - Properly release connector->fwnode. - Properly release next_bridge. Chaoyi Chen (7): drm/bridge: aux-hpd-bridge: Add drm_dev_has_dp_hpd_bridge() drm/bridge: Implement generic USB Type-C DP HPD bridge drm/display: Add soft depend for aux-hpd-typec-dp-bridge module drm/bridge: aux: Add drm_aux_bridge_register_from_node() phy: rockchip: phy-rockchip-typec: Add DRM AUX bridge drm/rockchip: cdn-dp: Support handle lane info without extcon drm/rockchip: cdn-dp: Add multiple bridges to support PHY port selection drivers/gpu/drm/bridge/Kconfig | 10 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/aux-bridge.c | 26 +- drivers/gpu/drm/bridge/aux-hpd-bridge.c | 42 +- .../gpu/drm/bridge/aux-hpd-typec-dp-bridge.c | 67 ++++ .../gpu/drm/display/drm_display_helper_mod.c | 1 + drivers/gpu/drm/rockchip/Kconfig | 1 + drivers/gpu/drm/rockchip/cdn-dp-core.c | 358 ++++++++++++++---- drivers/gpu/drm/rockchip/cdn-dp-core.h | 18 +- drivers/phy/rockchip/Kconfig | 2 + drivers/phy/rockchip/phy-rockchip-typec.c | 13 +- include/drm/bridge/aux-bridge.h | 12 + 12 files changed, 479 insertions(+), 72 deletions(-) create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c -- 2.53.0