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mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from IA0PR11MB7307.namprd11.prod.outlook.com (2603:10b6:208:437::10) by DM4PR11MB6165.namprd11.prod.outlook.com (2603:10b6:8:ae::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9499.7; Tue, 13 Jan 2026 02:48:02 +0000 Received: from IA0PR11MB7307.namprd11.prod.outlook.com ([fe80::dafa:d38d:8ac1:e843]) by IA0PR11MB7307.namprd11.prod.outlook.com ([fe80::dafa:d38d:8ac1:e843%6]) with mapi id 15.20.9499.005; Tue, 13 Jan 2026 02:48:02 +0000 Content-Type: multipart/alternative; boundary="------------4jWdDClFEj3gjCl64a5tJflb" Message-ID: <8a403d10-a5e6-4332-a584-a1aa554c4040@intel.com> Date: Tue, 13 Jan 2026 08:17:53 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH [RFC] v3 5/7] drm/atomic: Allow planes with NULL fb along with async flip To: Xaver Hugl CC: =?UTF-8?Q?Michel_D=C3=A4nzer?= , "Maarten Lankhorst" , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , "Vivi, Rodrigo" , Joonas Lahtinen , Tvrtko Ursulin , "andrealmeid@igalia.com" , "Kumar, Naveen1" , "Syrjala, Ville" , Dmitry Baryshkov , "dri-devel@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" , "intel-xe@lists.freedesktop.org" References: <20260108-async-v3-0-e7730c3fe9ff@intel.com> <20260108-async-v3-5-e7730c3fe9ff@intel.com> <6316ba11-0660-419c-afb6-a1588f6efef5@mailbox.org> <05ac3e30-b3dc-48ea-96db-1cbdb4454730@mailbox.org> <385071a7-15c9-4265-87b0-fe30dcf6f87e@intel.com> <702511b9-28bc-4ea0-809c-f14135a80af1@mailbox.org> <63c2c8b1-d695-454b-ada1-b79d61018bd6@intel.com> Content-Language: en-US From: "Murthy, Arun R" In-Reply-To: X-ClientProxiedBy: MA0PR01CA0016.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a01:80::23) To IA0PR11MB7307.namprd11.prod.outlook.com (2603:10b6:208:437::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR11MB7307:EE_|DM4PR11MB6165:EE_ X-MS-Office365-Filtering-Correlation-Id: 95ab18e8-beff-436e-47d9-08de524e2b0a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit On 12-01-2026 21:33, Xaver Hugl wrote: >>> I see no request for being able to mix sync & async plane updates in a single commit. >>> >> Sorry maybe I might be creating more confusion or my words are not >> giving clarity. >> >> Let me try to put it in simple words. >> The >> comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2857640) >> from Xaver says that disabling of cursor plane along with a sync flip >> should work. >> Uma in the >> comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2863599) >> has acknowledged the changes. > That's about a plane that was previously already disabled by a > non-async atomic commit. The issue is about the async commit failing > in a sequence like this: > - disable cursor plane in sync commit > - disable cursor plane in async commit + flip on the primary plane > > I would *in general* like to be able to use the cursor plane while > doing async flips on the primary one, but I think doing that requires > more discussion on the high level API design first. > Few discussion around this in the v2 version of this series. *https://lore.kernel.org/dri-devel/16c6c70f-0b89-4a41-8e3c-835a9ce296d5@intel.com/* Thanks and Regards, Arun R Murthy -------------------- --------------4jWdDClFEj3gjCl64a5tJflb Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: 7bit
On 12-01-2026 21:33, Xaver Hugl wrote:
I see no request for being able to mix sync & async plane updates in a single commit.


Sorry maybe I might be creating more confusion or my words are not
giving clarity.

Let me try to put it in simple words.
The
comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2857640)
from Xaver says that disabling of cursor plane along with a sync flip
should work.
Uma in the
comment(https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13834#note_2863599)
has acknowledged the changes.

That's about a plane that was previously already disabled by a
non-async atomic commit. The issue is about the async commit failing
in a sequence like this:
- disable cursor plane in sync commit
- disable cursor plane in async commit + flip on the primary plane

I would *in general* like to be able to use the cursor plane while
doing async flips on the primary one, but I think doing that requires
more discussion on the high level API design first.
Few discussion around this in the v2 version of this series.

https://lore.kernel.org/dri-devel/16c6c70f-0b89-4a41-8e3c-835a9ce296d5@intel.com/

Thanks and Regards,
Arun R Murthy
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