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 10988CD8C9D for ; Mon, 8 Jun 2026 07:11:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7E28010EE02; Mon, 8 Jun 2026 07:11:04 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=airkyi.com header.i=@airkyi.com header.b="UW+DZviq"; dkim-atps=neutral Received: from bg5.exmail.qq.com (bg5.exmail.qq.com [43.154.155.102]) by gabe.freedesktop.org (Postfix) with ESMTPS id 46E1B10EE02 for ; Mon, 8 Jun 2026 07:11:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1780902654; bh=c8bAbxQipQScLcXxmIAXdGHi58J7IG7meuZVe7IO+SA=; h=From:To:Subject:Date:Message-Id; b=UW+DZviqQ+GSgkEHyyDaaOSJgrweut5k6u3Row0GpjM74F5cVwVui7f1lAyyLAC+O daaVeaOzjiQYTg5jlVs1Qfj0FzcMlpn900XlZExX4eIcSIGE5Kv2VrvLtDoP9vuMam HZSkWPe2Nnp+9I/+1RjLLschSK6i0QWHbTOJy5To= X-QQ-mid: esmtpsz10t1780902493tf527980e X-QQ-Originating-IP: xBVLmXb3lGPeq0AFgUf7H3AOXSDXzX2o6/6guapiblY= Received: from DESKTOP-8BT1A2O.localdomain ( [58.22.7.114]) by bizesmtp.qq.com (ESMTP) with id ; Mon, 08 Jun 2026 15:08:09 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 7290291170136112092 From: Chaoyi Chen To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sandy Huang , =?UTF-8?q?Heiko=20St=C3=BCbner?= , Andy Yan , Vinod Koul Cc: Nicolas Frattaroli , Sebastian Reichel , Heikki Krogerus , Dmitry Baryshkov , Luca Ceresoli , 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, Chaoyi Chen Subject: [PATCH 0/5] drm/bridge: Implement generic USB Type-C DP HPD bridge Date: Mon, 8 Jun 2026 15:08:00 +0800 Message-Id: <20260608070805.88-1-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: M0B+OzpJUlV8MN2xVCHpU/4mXOLXvqr5vEkmpkiW/6PeFB8n6y9kGgiR AH9i3l1jT5gRy2rDWws1sMu+d81Y5gKiQ7kOXIiUWoIrKccRTslUtd7fTrIlKa+KnluWh80 Sai8HV1ibQUl08H3yswtkei/N6v1dScKKXp65G0MOovrF7IEYpPnAjT4JVkj5xm7nevyoes MeBErRprj1ucSuD5WlCxdSDQhdz4UWqesMgbtaEZdvFqlDTNM8ry1qjDg+tXvBkpe8BU7/d LXkP+I3e0PKFcXUkRrlIbbztYZV5pvNlixr1yAMkmJPlq71G2jczlHENoyflLQCjxmcWv5E 6MfeTYktP9EcL9/Mq74kDCFjmfkC9g7dNoBXfLxvYKI25g3dqU56J8vVFkHQDSief1sFfmt reprog77HFCtGRGaVz3qI8vRTU5lHrc/TN9aZZI7ecWL9wLMF8i3+kuTOrtaFkqkFFYuzvS azp8jGlKhL2Z1avAuDW9b/rcVEiFWG88wKBpXgh2Q+7H6c/2yurBqL+AJMaiGjRhSRil4Ut mnEUbXbY6HzNISdA+zaa8UlYboWOxp8+Pn+3uEJWiGMudBgT8o/bf28iQi7Md78hl8EjkGE lmzDyGRDcnsDIXBg7edlyqQv/NUVvNpIztLP/VkKLKzmeP0qqeY8eC9tQEXXuO4TN+pMkOJ z1b2Espyg1fmZSA8GLwgC7Hy5tZk8QjZGZ5xs2ReUp0GPb0uuz+PUwAA/78Bw2EzK0+X8OG E3+jC35P0WUSG0BAlzKBQ2cbYtWcmQtzBnf/+6jli71vywxe//i2p7MusfRc6TVe0iKmLSd 4fbXLrMDYV0V2XRGoU80V7goZMWYXEshp9+2bbOXn+g7hq4ef/8+87ArxQSxKEoRG00+CcH ag3oFYsBfLHOMbQnWfg8oLYPhBh1lN5AHujwSGE7Z9sgPxP7aUFEAanZ/7NA5tQovxOlVKv odRSbcYoB/e7XB3Y1mgwoO0bSMZo0SM4y8xTQGf0SQJnUE7qFny5fREPcAzCi9phW4MDRp6 68FjahbYM0QF7NrX5Z8nRkSlCydUs= X-QQ-XMRINFO: MSVp+SPm3vtSI1QTLgDHQqIV1w2oNKDqfg== 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 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 generic USB Type-C DP HPD bridge (Dmitry, Heikki). Patch 2 adds new API drm_aux_bridge_register_from_node() (Neil). Patch 3 adds DRM AUX bridge support for RK3399 USBDP PHY (Neil). Patch 4 drops CDN-DP's extcon dependency when Type-C is present (Dmitry). Patch 5 adds multiple bridges to support PHY port selection (Dmitry, Luca). 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 (5): drm/bridge: Implement generic USB Type-C DP HPD bridge 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 +- .../gpu/drm/bridge/aux-hpd-typec-dp-bridge.c | 54 +++ 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 | 6 + 10 files changed, 418 insertions(+), 71 deletions(-) create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c -- 2.54.0