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Wed, 18 Feb 2026 03:34:58 -0600 Received: from [10.24.50.162] (uda0510294.dhcp.ti.com [10.24.50.162]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 61I9YpSG643228; Wed, 18 Feb 2026 03:34:51 -0600 Message-ID: Date: Wed, 18 Feb 2026 15:04:50 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 0/6] MHDP8546 fixes related to DRM_BRIDGE_ATTACH_NO_CONNECTOR usecase To: Harikrishna Shenoy , , , , , , , , , , , , , , , , , , , , , , , , , , References: <20251209120332.3559893-1-h-shenoy@ti.com> Content-Language: en-US From: Beleswar Prasad Padhi In-Reply-To: <20251209120332.3559893-1-h-shenoy@ti.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF000061C7:EE_|LV8PR10MB7799:EE_ X-MS-Office365-Filtering-Correlation-Id: b68e79d8-e2f6-4bfb-e4dc-08de6ed0fc0a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|7416014|376014|1800799024|921020; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: OL8Lf/ovewUGBLDOR8R0DQU1eaHdhbMxMzGEdVnK4MPqAmv0eLtvh0YffYT2SbimEShCKcy6auVMLFbxWISsc6Lzk3PvdkSsUdT7VtgrjtAleW8uZqURAEwL9odQPkqfHQKpvArGBvJ/t7Rz7WPN6BtBoKIwx3prXQiAahqHTPLbb7akDOAVZGyZFJ7a9E6OCznfcoFVwidvoezIzh1tBh5nE9AzgoOo1/NDJVcPFfgkwwopl4bk4HArg37mDX7WlKbsPchqv46qwUQukzXeJHNJJzsMyaASHZbdydxlcbIN8y5drPvfxsic9vPzXE57EIOhzsPl+bsra6VdVOemhvyHjnogOQRcc3B0OmJq+Xm4XnFydWcV8yVdCracnHDd8Q5gYiBQorkYVRX6U1YJbc7tH++KDzL15fiEiEpiFdBdbPAfDX86lku77gbdfT61 X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Feb 2026 09:34:59.3051 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b68e79d8-e2f6-4bfb-e4dc-08de6ed0fc0a X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.194];Helo=[lewvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF000061C7.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV8PR10MB7799 Hi All, On 09/12/25 17:33, Harikrishna Shenoy wrote: > With the DRM_BRIDGE_ATTACH_NO_CONNECTOR framework, the connector is > no longer initialized in bridge_attach() when the display controller > sets the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag. > This causes a null pointer dereference in cdns_mhdp_modeset_retry_fn() > when trying to access &conn->dev->mode_config.mutex. > Observed on a board where EDID read failed. > (log: https://gist.github.com/Jayesh2000/233f87f9becdf1e66f1da6fd53f77429) > > Patch 1 adds a connector_ptr which takes care of both > DRM_BRIDGE_ATTACH_NO_CONNECTOR and !DRM_BRIDGE_ATTACH_NO_CONNECTOR > case by setting the pointer in appropriate hooks and checking for pointer > validity before accessing the connector. > Patch 2 adds mode validation hook to bridge fucntions. > Patch 3 fixes HDCP to work with both DRM_BRIDGE_ATTACH_NO_CONNECTOR > and !DRM_BRIDGE_ATTACH_NO_CONNECTOR case by moving HDCP state handling > into the bridge atomic check inline with the > DRM_BRIDGE_ATTACH_NO_CONNECTOR model. > Patches 4,5 do necessary cleanup and alignment for using > connector pointer. > > The rationale behind the sequence of commits is we can cleanly > switch to drm_connector pointer after removal of connector helper > code blocks, which are anyways not touch after > DRM_BRIDGE_ATTACH_NO_CONNECTOR has been enabled in driver. > > The last patch make smaller adjustment: lowering the log level for > noisy DPCD transfer errors. A gentle ping for this series. This has received multiple R/Bs. Please help with a review/merge of this series. Thanks, Beleswar [...]