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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 1000BC55172 for ; Tue, 4 Aug 2026 07:17:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc: To:From:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=4uFCqu0p0pYyvP6VJhfQU8lFG2oyNVxdn8MamPTgQlc=; b=c9AhKx5QhETpLwM/s9SGS91xK6 taKm1hHT+/BeW9C96lUBW1wAXAFHbBhK2mFaKmuyfL/81k/cTq1t8neEOzL7XycYVcZbO3RBlzrNa VEv9z0rh5UEHBZMy+hzFqhLWI/sBaO/QFd4FSobscvb7W5ScegxrHMyQT1EfOJiCUagcEFmNrL4mX r0ip5ePeB8LARfSB5Rg0ydjSt5xytIcRrK8rB+QgziNLQZw88tKi5s8D6XBt1xfsCqOmT9wGdA9Yp L2eerqBhMcLMqdUfK/z4CWvcq0Fv/HSTzS8e/2Px/hbsUanjn7YjMGvdML65ualrAec5AHwrFl4+u URV/ONCg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wr9OO-00000001CNR-3YQT; Tue, 04 Aug 2026 07:16:52 +0000 Received: from smtpbgsg1.qq.com ([54.254.200.92]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wr9OL-00000001CKm-3QdC; Tue, 04 Aug 2026 07:16:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1785827275; bh=4uFCqu0p0pYyvP6VJhfQU8lFG2oyNVxdn8MamPTgQlc=; h=From:To:Subject:Date:Message-Id; b=I0yjU1PQzTUl8uMGMjjlAeTNYSsoxhq3OYQvlMCkqg7Mv4vdAJbvI4R0rziKlLsJK KHA2qCoY0BSMGETCBhpFt4Urrwu3EC+h9miUpSvaabJzZNq7Zqv1lSjT6WFKCg16dG zES1BudM3cL4KSETfVcROmu56w+yXzBHXEtlBMsE= 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: MIAHdi1iQo+zITF9HdJdWmWK40lUOF17tqavC4zys0fyH8qejoS/pbwE np/Zkorx7NcvsgkAwb5bHRabFByV2VX9yWm/0twxyCSXgLPbWpfIq5LuNI+QEsGjzjg516n FIccSAknBx9KjOnLdzK2UUmrsR/SyjvxCY+HhfL/Ri4HMM+ApMUq0g3zIwzDjmnpHn7Smnw dh1Tqpu7w9UF7ItBGBPtMJNoMV5PKa3Ftmgr3hs+FRzs3FinZHlQQ7Cwq7KkvS39VeXVCDO wbHR6j2I5fqRaPJRrqYQhJKb2ZqWMboee3zd9f4sHMMI1lMcYIQxfTic53pCvtAfH/oQpVR F/Idp4k0TnmOKw03UnNnpKK+pNwy98JQTTbxLPMwilI4j64uSVwlspOuD5iJRzQDaEuRtk+ cMWl8G2DS/TxY2zJkwk+w9Je851dGr7QuSOagHN3eyc4AQYR2FL5V+xnRkjBb6XDeNsOQ8q LARU+NSKV0Rm4q2YvlNObupzGZO8p+x/+zCRPKH+ehyLk0EZT2GV5hmpPW6Taw+1pawo7mm O4az+lEG36Y6IbTYjzQem2msIXKaaGhz+D42Y+ZHuBe+N77v85JYkpN11AVfv8MaQmbPRhK SowDgI6ead6vPCLMKxuTAwC5Vm8nQgfv6D8CpVjrgnsm10/fFbd8Y2adVlI+8iQ87h/UDts CmWJc4S+bjlW0Qtgf9/LZvYnZ8MddGghTmM1MGb5FbDEfawNce/9x+4qw1+SewdxU9nUFl9 D9ISbxk4GUzqJfNcqP07cpXZ+cxnFh5lvghymUx4Z5wtGsb+IAAZ1uf85nUoXjSxal/TzEf znd9CteZYiYAtIktIwN1/tJMjXu+Vr2NwNR4Ecy0ihGtt0xn/TBGfURVSqTKXWVpJPSIC/D ygGK8YymklF0jRfh+LCS9s1JlRToUg3PZE8KHSSR7SMzGHe0qR4bUIZ0vNgjOYYUtQlKOfT lwLNTzt6SPPUQA1jWNh/QE+QmISHgvjWqe8AlkKRkEvrX2MvoIAYz2WZoJmq/pwvDpkOLtr cgcvq2+igQN6uQPH4DIceEWqKHYOWPqJK1GDRxG5JfURzVZPXo X-QQ-XMRINFO: NyFYKkN4Ny6FuXrnB5Ye7Aabb3ujjtK+gg== X-QQ-RECHKSPAM: 0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260804_001650_243219_03EC8E04 X-CRM114-Status: GOOD ( 11.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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