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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR11MB3177.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: a353d82c-33cf-4c4e-2c19-08da28d8e301 X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Apr 2022 05:35:21.2585 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: V7GT1DkDLVaqQqbajBRnWZOLNC9qCXuAuSvoL4DvK34VeIm5b2WrGW2WWqmY3oXuA6Fc2YKx2cULDmIw2kdLAQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB4884 X-OriginatorOrg: intel.com Subject: Re: [Intel-gfx] [PATCH] drm/i915: Support Async Flip on Linear buffers X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "intel-gfx@lists.freedesktop.org" Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" > > > It's supported earlier than that. But IIRC there was some kind of > > > GTT alignment vs. async flip vs. FBC restriction that we weren't hand= ling. > > > > > Should I enable it for earlier Gen also, or is it fine to keep it with = starting > Gen 12. > > The only restriction that I see in Bspec is that during async flip > > changes to stride, pixel format, compression, FBC etc is not allowed > > and I see this is already taken care of. Am I missing anything? >=20 > There is that GTT alignment restriction that should be mentioned > somewhere. Can't quite remember where it was, maybe in PLANE_SURF. >=20 I checked the BSpec, and don't find anything as such specific for Async fli= p. I also cross verified with the hardware team. > But I guess the bigger question is what is the actual use case for this? This feature is a requirement for LNL. Thanks and Regards, Arun R Murthy --------------------