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Tue, 20 Jul 2021 11:06:09 -0500 From: Wayne Lin To: Subject: [PATCH 4/4] drm/dp_mst: Release disconnected connectors when resume Date: Wed, 21 Jul 2021 00:03:42 +0800 Message-ID: <20210720160342.11415-5-Wayne.Lin@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210720160342.11415-1-Wayne.Lin@amd.com> References: <20210720160342.11415-1-Wayne.Lin@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f9052a7b-5e8a-4c8e-8079-08d94b984b73 X-MS-TrafficTypeDiagnostic: DM4PR12MB5183: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7219; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: ngzJbE1vCiffCaNIF7qLWz7jYwQ1M1TQiJkV0vMGtH+FtLujyeTwZR4HF29Rd99VH3rTFg8UwvP5i9jRKMGIk2GjQwExnL+bt2oGo5qdNfXkOLsB9H3Et55BCUCzIrjfXP6yoRLLeAD0W6MzOhOJqi1q6VIShaMYoI6CyeWE5hFSqP9o4x/LYgtK1PVf/A8SdIcQXhAEJTPG1L+BJTkMUCWFn/QaArM2A8KEhNkCEBV6qlx81ZzHZGU0oMAvKqFdD1LfqE6zwSNihbYePdIgcxNAMpNCJ2ZSYWlPgkzUaxdawikyFvWE2j6jQp1Q5LQEb3vW903kyiIQa2QlxibX2OpPXWJ780LND3XeqJfN/JHJd4CDxBPWcOMBDWiPAV+G9rw4opQhHa+Jg2oxXeLD0d91f40zMMFZ6F42cCpxflGafPdF+Z0ZX9YWCZTeZjoq2G5hfmHhYGgE7xprks0aCM3n6SaF/f19IByUmwD1ShNm1qUhrD978UCkBtbtGlk0hlyVUtfDqSTUjISbE0J2x4/nJ2Jq+PCuY3R1STv0YGyLRPcB3i4iZ2wTqiUW4zIgJSj6TRT0xT+vj6+Bu7ySw80RzKCUFgDv+gef8hK/3KxiZIMREhOCs1HID1OFx+zKUJQRuXdh6q3oek0nVmoTGUSAb8lXU8WochWkKgfABFIqU0psUq8Nw6/yDg4m1QTQEzxVhMqdxydwqUQ+oWQUeGmChuMSFFycG4pTYDSlKGo= X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB03.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(4636009)(136003)(396003)(346002)(39860400002)(376002)(36840700001)(46966006)(81166007)(7696005)(36756003)(5660300002)(8936002)(356005)(4326008)(1076003)(36860700001)(26005)(2906002)(47076005)(6916009)(6666004)(70586007)(70206006)(8676002)(82310400003)(83380400001)(186003)(336012)(86362001)(2616005)(426003)(316002)(478600001)(54906003)(82740400003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jul 2021 16:06:12.2079 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f9052a7b-5e8a-4c8e-8079-08d94b984b73 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT045.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5183 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: , Cc: stable@vger.kernel.org, jerry.zuo@amd.com, hersenxs.wu@amd.com, Wayne Lin , Nicholas.Kazlauskas@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" [why] When resume, we will reprobe the topology to detect any changes during suspend. If we unplug a branch device during suspend and then resume, we can eventually unregister child connectors of this branch device because we call drm_dp_mst_topology_put_mstb() in drm_dp_port_set_pdt(). However, we don't unregister connectors for end devices which is disconnected during suspend. e.g. Unplug a SST monitor during suspend then resume. We won't unregister this connector which is no longer exist in the topology. [How] Unregister connectors for disconnected end devices when resume. Cc: stable@vger.kernel.org Signed-off-by: Wayne Lin --- drivers/gpu/drm/drm_dp_mst_topology.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 85a959427247..0b04ea65cb8e 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2478,6 +2478,12 @@ drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb, drm_dp_mst_is_end_device(port->pdt, port->mcs)) drm_dp_mst_port_add_connector(mstb, port); + if (port->connector && port->pdt == DP_PEER_DEVICE_NONE) { + drm_connector_unregister(port->connector); + drm_connector_put(port->connector); + port->connector = NULL; + } + if (send_link_addr && port->mstb) { ret = drm_dp_send_link_address(mgr, port->mstb); if (ret == 1) /* MSTB below us changed */