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Mon, 23 Feb 2026 10:07:51 +0000 Received: from IA0PR11MB7307.namprd11.prod.outlook.com ([fe80::9d4a:f89:f548:dbc7]) by IA0PR11MB7307.namprd11.prod.outlook.com ([fe80::9d4a:f89:f548:dbc7%6]) with mapi id 15.20.9632.017; Mon, 23 Feb 2026 10:07:51 +0000 Message-ID: <1a4462b8-def9-4474-8382-6e99b7c8276d@intel.com> Date: Mon, 23 Feb 2026 15:37:39 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 0/7] User readable error codes on atomic_ioctl failure To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Rodrigo Vivi , "Joonas Lahtinen" , Tvrtko Ursulin , , , , , , CC: , , , Suraj Kandpal References: <20260223-atomic-v10-0-f59c8def2e70@intel.com> Content-Language: en-US From: "Murthy, Arun R" In-Reply-To: <20260223-atomic-v10-0-f59c8def2e70@intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MA0PR01CA0021.INDPRD01.PROD.OUTLOOK.COM (2603:1096:a01:b8::9) To IA0PR11MB7307.namprd11.prod.outlook.com (2603:10b6:208:437::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PR11MB7307:EE_|SAWPR11MB9548:EE_ X-MS-Office365-Filtering-Correlation-Id: d008f7ea-c9d3-47e4-51be-08de72c366f9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Thanks and Regards, Arun R Murthy ------------------- On 23-02-2026 14:45, Arun R Murthy wrote: > EDITME: Imported from f20260210-atomic-v9-5-525c88fd2402@intel.com > Please review before sending. > > The series focuses on providing a user readable error value on a failure > in drm_atomic_ioctl(). Usually -EINVAL is returned in most of the error > cases and it is difficult for the user to decode the error and get to > know the real cause for the error. If user gets to know the reason for > the error then corrective measurements can be taken up. > > User will have to check for the capability > DRM_CAP_ATOMIC_ERROR_REPORTING before using this feature so as to ensure > that the driver supports failure reporting. > > TODO: driver specific error codes are to be added and will be done in > the follow-up patches. > > TODO: Once the series is merged the element 'reserved' used for sending > the failure code in struct drm_mode_atomic is to changed to err_code. > > The IGT related changes are pushed for review @ > https://patchwork.freedesktop.org/series/153330/ > > [RFC] changes for libdrm pushed for review @ > https://gitlab.freedesktop.org/mesa/libdrm/-/merge_requests/450 > > To: Maarten Lankhorst > To: suraj.kandpal@intel.com> > To: Maxime Ripard > To: Thomas Zimmermann > To: David Airlie > To: Simona Vetter > To: Jani Nikula > To: Rodrigo Vivi > To: Joonas Lahtinen > To: Tvrtko Ursulin > To: xaver.hugl@kde.org > To: harry.wentland@amd.com > To: uma.shankar@intel.com > To: louis.chauvet@bootlin.com > To: naveen1.kumar@intel.com > To: ramya.krishna.yella@intel.com > Cc: dri-devel@lists.freedesktop.org > Cc: intel-gfx@lists.freedesktop.org > Cc: intel-xe@lists.freedesktop.org > Signed-off-by: Arun R Murthy > > Signed-off-by: Arun R Murthy > --- > Changes in v9: > - EDITME: describe what is new in this series revision. > - EDITME: use bulletpoints and terse descriptions. > - Link to v8: https://lore.kernel.org/r/20260129-atomic-v8-0-4cb7b0faa051@intel.com > > --- > Arun R Murthy (7): > drm: Define user readable error codes for atomic ioctl > drm/atomic: Add error_code element in atomic_state > drm/atomic: Call complete_signaling only if prepare_signaling is done > drm/atomic: Allocate atomic_state at the beginning of atomic_ioctl > drm/atomic: Return user readable error in atomic_ioctl > drm/i915/display: Error codes for async flip failures > drm: Introduce DRM_CAP_ATOMIC_ERROR_REPORTING > > drivers/gpu/drm/drm_atomic.c | 31 ++++++++++ > drivers/gpu/drm/drm_atomic_uapi.c | 89 ++++++++++++++++++++-------- > drivers/gpu/drm/drm_ioctl.c | 3 + > drivers/gpu/drm/i915/display/intel_display.c | 25 ++++---- > include/drm/drm_atomic.h | 10 ++++ > include/uapi/drm/drm.h | 7 +++ > include/uapi/drm/drm_mode.h | 37 ++++++++++++ > 7 files changed, 165 insertions(+), 37 deletions(-) > --- > base-commit: cec43d5c2696af219fc2ef71dd7e93db48c80f66 > change-id: 20250728-atomic-c9713fd357e4 > > Best regards,