From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbgbr1.qq.com (smtpbgbr1.qq.com [54.207.19.206]) (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 39C9A3F1041 for ; Fri, 28 Aug 2026 08:48:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.207.19.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787906897; cv=none; b=c3pAt6B9oK76bo0eQENactg+i0D8qQ6yPZkYzZ7J3lpp3Ya0pxI9Sj6YzBGKBAV+iN2H+TCXIlkujMmUNrf7WpCSttKAWd9FNUJBOCJzh8sl2rgiTjPqsQddGDKDBDuQZSJRoVPAtnqiy/ELyrOeni+g96dINTksiNlY/g3/Q5g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787906897; c=relaxed/simple; bh=a9kQroVKeOdWvlL+KYo2+mSovewMxk8pKEN1+JoGhZc=; h=From:To:Cc:Subject:Date:Message-Id; b=pVMqSTaN0xPO4LAlnI7/QTJrz6IOZ4/VkO2ZG+/D+8VCTmYSkW0w/XRvmbJEG3y7gBMPMZHMNimAHsMfuaIJukEtd+o5qtNbTC+14vr2wMDaKhTxGpTKSDOwJmgjeW0ftw60bJCAr3yUQArRDM4BfJqo+G2XdhcfSatl7c9d6io= 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=rAEMia8/; arc=none smtp.client-ip=54.207.19.206 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="rAEMia8/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1787906866; bh=fU2EHerhlIwxT2o5ahO4wxyga76HDhwM2gRiLj32KsU=; h=From:To:Subject:Date:Message-Id; b=rAEMia8/qC37dxyAeYkBUYqVtaRjKuNrQp/atAywRT/6WJfeO3oL5pRcvF8e8wFMF oUC2+YxDPV7DIAl84fx5KgdiwYv3qJwFkUsTgGjL7MggLgo1oxx31oWvg/IRkgqZQD kQsmUEf2S5YoYdOjO0v1/w+4xekTaIH/HJl4XN8k= X-QQ-mid: zesmtpgz6t1787906864td0ccb54b X-QQ-Originating-IP: rkT6K/MSciY2YH9oQfiA45bVQ3QMm0H3itZhu9mfyNk= Received: from DESKTOP-8BT1A2O.localdomain ( [61.154.14.86]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 28 Aug 2026 16:47:40 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 3426117217437372849 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 v7 0/7] drm/bridge: Implement generic USB Type-C DP HPD bridge Date: Fri, 28 Aug 2026 16:47:30 +0800 Message-Id: <20260828084737.565-1-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: NBkDu2gtk8Xi+8Knk8WSsoh8ZfzDo4HXAqdNejpm4OjhtF+utoh4+zoz kpMPPIckWKazu658jPq1uM6MXjLMQ/K6saGBEH1X7aejLKOKrDCI9Kbwh63L/aUXyN8rONz KsBMrbwhgmEaLwNloG9IJcfHcberz0v6u4MuvhC4L/lVzhCWv7mOPDuQcM5I+6kWVZEOMq3 sWgOpBH+dJhsD60/cQleijX0GMPYYJCMYV+qv5PcwO8uA+T1aaRGB/Zz5qO5XELqq2vYX2J DMtNx5lKADSsd9Pw0t48fM6R2IDXyGN5JFzdoE37CaUEv0eoZYA9XfDkGTwW/N99MZhW6fe M0GVmOEqGnWOU2rmQXQ+eoZB4LkjZdCTGp0Jka9q6+hVDlxooa3x7lpSxysJ6IVnmANrr6e AI0CPSoLDLszGA6ZOBxnXCtgTqtvkOXBi4WRjDm5fAo6FYTvc/yKyyW9QJsIeQS9+SSKSNn K8ct+zdDSJAb1QiKjKm3alhhcb4GRAoaKks04YuNq4E5Bx1cWcosJgZS7C59Qhyo9pLz73d mt69+0D3ch9ToiV39rR4pfnLWzlcZ7s50d0uAEA1+9vTtQ+1AYMgEkqg3XMyRIUc9qftgps Vga2es3ER9BWlWEoTapL2b0LYbniaeiWVOSag+nEN+5Glvv1tF1L2SPQ1tM4lvkKJv4jm8G pzzZWgc4RkVOORU4bkezCnPH4id6YlgvmYUeEzfXGuZjWjFEae4wGc9sM6L3qQQ8FHnsp8o /7+E1QMSzOUSlXfGHvby6GsRnt5UZVqaf2PGnjiYSvjpsoyE+zBtHqPuShmspHq7qg2ZZsB d2SEXDIcjABofSRhVGOihfe6w2nWeKtsIWkV3TOtyZtQLuxVee+3zw6qKC+QFJZbCAgmB5Q +l0B13TDKwuybxqhgVxZ+URF7PExsBy1mGQoLeJBSkVn4kCSfmrmeND/tna1hPPfPRDeUzL GZdX6LoItLCxFI767/2DUd9JjNY1lwkjW/1m9Ly01wZQ4fWXYQMgh9bJ59JmzI/xeEhNnud 0oz22U07C/VfBztswhBaEH2os8XLk= X-QQ-XMRINFO: OD9hHCdaPRBwH5bRRRw8tsiH4UAatJqXfg== 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 v7: - Link to v6: https://lore.kernel.org/all/20260804070730.68-1-kernel@airkyi.com/ - Fix extcon HPD detection by checking lanes in cdn_dp_connected_port() (sashiko). - Bound endpoint count by PHY ports to avoid overflow and uninitialized reads (sashiko). - Use drm_bridge_clear_and_put() to clear next_bridge_list pointers (sashiko). - Clear EDID cache pointers after free in unbind() (sashiko). 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 | 365 +++++++++++++++--- 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, 486 insertions(+), 72 deletions(-) create mode 100644 drivers/gpu/drm/bridge/aux-hpd-typec-dp-bridge.c -- 2.53.0