From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbgau2.qq.com (smtpbgau2.qq.com [54.206.34.216]) (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 10A532F7EE1 for ; Mon, 8 Jun 2026 07:08:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.206.34.216 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780902513; cv=none; b=ZyawfqD1MMnuaUaXArvcfiJNdPwrVqi0BxkVitM01l6adyIiId4b3TiHNXwQH9mngpq7jIy1LAchto+O1N3EKMMx9Rfg7YlLtgFc40iomkMne4uVentqWXmQUV+SISK0buZ2mUXu4F1fun1LgxIZuWdvcSsH4fFzZyv5K5C8aUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780902513; c=relaxed/simple; bh=bjDwpfeF0ODWq5G7f6XUdhwHnkc1HpkU0DFaA8hNDIQ=; h=From:To:Cc:Subject:Date:Message-Id; b=beCE6SCeO1B5jfQUDVSU6qk9LIdCAjAwmPMspdepi9S4EmUZy+O2yFmdznL3HH76cIIQRtKSy4gbzJ8xdkVNxlqQOZC0Y2eqEoX8z5Fy42UT4/N7whiGRvHiJv7f02QvJgkc7jsQMI3zc2bXslLN4kCd9h+/1p6XaNJHfQ/G1qI= 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=mDK6YMdp; arc=none smtp.client-ip=54.206.34.216 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="mDK6YMdp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1780902496; bh=c8bAbxQipQScLcXxmIAXdGHi58J7IG7meuZVe7IO+SA=; h=From:To:Subject:Date:Message-Id; b=mDK6YMdpRY7m9SRtJHypLdlzY+VhKt5fQVhT7unz3PJHjc4NFBxceSGSFKAS4Qrg/ dJ/NYREd0JCx9c+w+8umwEIlGtTWiLO6MdkkEDAodP7OlEMTBS36vxJcybY1qPhjgA Q6b2HaOmmcHhUF8u382DCglH3EFL7Ku2Pl3sMfi8= 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: NSG2u4p30XpIPm/lRggIf/iK0ankIylfr8HglJ21nbAc3MJI0MRThGh1 OLsTbCD+YRLb1oTEQ2aAqn9G0cktKZE6CuLm8FW6tR7EezT6v3qCv/JrK4psgeTESz9/1OS sxDA9dBcMxvYlLhBpP2cIi8HtBvBByJ4SZwwbtaT48Lac2rmNhBdJI0s3rXptcFbB3xvI2X aoyoGt8/dp7sfLjFJWYY4yYx1Fqf3wHv/IzmdYjhslhAXxrI4snTkTZzMcbUhDJhaTRDVSt UlTnrpkJuAy2+2mSTfQs2V+xiqZbCLsVCufFIBj3eXg+S0eJqtHn28PWr/WNDcI4XtZxRbC zar90ve6EapnOkD61Ftuyo1SmqO38kqCziYaMIwH5cUb1rBdd8Kf0zXJafnqnqTMbQDaFHH x6WRiDyRTxOIcn/zBv9VhE3MHsIj+yTMPzOBYzzdYX3ecNPjlUz0fWvvGfvDk/9y1iNJtqm lCXvJfA+HLw6llNLHATo4SF1c32e2ahpGXBNcb8W0SgYrOdTfCSrhSWvbGYXao0JKNBpnDO KGqeCgWEcgtP4RNUMCPtvRR3vgH753bQKxoUwBw4QWzleAL12slkn6wqmYtY0Ac6lK6CzFu /agID7sGNpIK4G9k6rwdvct0TEW4EgVvZni75RS0rbBkdeOAgrVzP8fufvD34qJ4cTuGMAG VWgg/7tCMhRTQ+meB2wBeEv5Wwv6av8MXbJqz77zqgSR/V7V3dA78qUOnAHfZNaqrNCdrx9 TFh22L1iLFtN4WaJcq9aUCq51578Kk6lKsOExBa+SAKL1lUMzGuaGL8k1KHFNnrR0mJPLlQ CI6ktjJEe2g0g8Qmzaf5FO4gSZpe63EquxelbfUoPUVmAueOkaWi27YinIT3mmZ58e5v1eb YnbckNq7gCLwhHnaLao9iYTslf4gS5e1CqgoOcnnh2KFmOdBuXb0AollaMkcSGxP8aoc4j4 IBvtg099GxRquHtwucfl8Bt/UoB5Hv88b88kgrDtx0YuEOWgrLVnkEZsQLI654i9MC1SiKk m0LCpy6Agm+igl2M072kz68ITahcs= X-QQ-XMRINFO: Mp0Kj//9VHAxzExpfF+O8yhSrljjwrznVg== 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 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