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Wed, 11 Feb 2026 10:07:41 +0000 Message-ID: <7a1fa826-cddc-4f8d-ae45-afe6ddecd6e0@amd.com> Date: Wed, 11 Feb 2026 11:07:34 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drm/amd/display: add module param to disable immediate vblank off To: Michele Palazzi Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, harry.wentland@amd.com, sunpeng.li@amd.com, alexander.deucher@amd.com, mario.limonciello@amd.com, Rodrigo.Siqueira@igalia.com, alex.hung@amd.com, aurabindo.pillai@amd.com References: <20260211074529.131290-1-sysdadmin@m1k.cloud> <2026021146-mockup-pushup-5f47@gregkh> Content-Language: en-US From: =?UTF-8?Q?Christian_K=C3=B6nig?= In-Reply-To: <2026021146-mockup-pushup-5f47@gregkh> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: YT4PR01CA0040.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:fe::23) To PH7PR12MB5685.namprd12.prod.outlook.com (2603:10b6:510:13c::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR12MB5685:EE_|MW4PR12MB6874:EE_ X-MS-Office365-Filtering-Correlation-Id: 7e165d6b-8915-49f9-239c-08de69556485 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; 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On 2/11/26 10:19, Greg KH wrote: > On Wed, Feb 11, 2026 at 08:45:29AM +0100, Michele Palazzi wrote: >> Add amdgpu.no_vblank_immediate parameter to optionally disable the >> immediate vblank disable path on DCN35+ non-PSR CRTCs. When set to 1, >> a 2-frame offdelay is used instead, matching the behavior used for >> older hardware and DGPUs. > > Please no more module parameters, this is not the 1990's with only one > one device in the system. Please fix this the proper way. I just wanted to write the same. We can of course implement something in DAL/DC, but clearly not behind a module parameter. Or is there any other negative consequence except for that the display blanking is delayed by ~40ms? Regards, Christian. > Also, this isn't the correct way to submit patches to stable. > > thanks, > > greg k-h