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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 PH7PR11MB7717.namprd11.prod.outlook.com (2603:10b6:510:2b8::8) by LV3PR11MB8556.namprd11.prod.outlook.com (2603:10b6:408:1b4::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9678.17; Wed, 4 Mar 2026 17:37:01 +0000 Received: from PH7PR11MB7717.namprd11.prod.outlook.com ([fe80::1405:e848:c9a7:e962]) by PH7PR11MB7717.namprd11.prod.outlook.com ([fe80::1405:e848:c9a7:e962%3]) with mapi id 15.20.9632.015; Wed, 4 Mar 2026 17:37:01 +0000 Message-ID: Date: Wed, 4 Mar 2026 09:36:59 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [i-g-t] tests/core_hotunplug: Open render capable DRM device To: Kamil Konieczny , , , "Janusz Krzysztofik" , =?UTF-8?Q?Zbigniew_Kempczy=C5=84ski?= References: <9e4d3126426686f9fde73011753ca1e85a32dd0d.1772578021.git.jagmeet.randhawa@intel.com> <20260304135601.iwue6vspcb5oxbo5@kamilkon-DESK.igk.intel.com> Content-Language: en-US From: "Randhawa, Jagmeet" In-Reply-To: <20260304135601.iwue6vspcb5oxbo5@kamilkon-DESK.igk.intel.com> Content-Type: text/plain; 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Because of that, selecting a render capable device up front seems like the most direct way to establish test precondition and avoid accidentally selecting a card-only driver such as simpledrm. Adding simpledrm to the list of known/blocked drivers could work, but we would still need additional logic to continue scanning and select next suitable driver. Selecting a render-capable device first naturally ensures we pick a device that exposes a render node and avoids the simpledrm case without adding special handling for a specific driver. There is no public GitLab issue for this, failure observed internally. On 3/4/2026 5:56 AM, Kamil Konieczny wrote: > Hi Jagmeet, > On 2026-03-04 at 06:53:32 +0800, Jagmeet Randhawa wrote: >> The test may select simpledrm when opening DRIVER_ANY, >> which does not expose a render node. This causes the >> later render open to fail. >> >> Open a render capable device initially using >> __drm_open_driver_render(DRIVER_ANY) to avoid >> selecting simpledrm. > This is strange, as this test assumes card open and then tries > uses render for verification so I am not sure if you could > start with render. Adding Janusz to Cc. > > Could you also add links to issues on GitLab, if there are any? > > Other idea to solve this would be to add simpledrm to known > drivers and a blocked ones, like VGEM. > > Regards, > Kamil > > Cc: Janusz Krzysztofik > Cc: "Zbigniew Kempczyński" > >> Signed-off-by: Jagmeet Randhawa >> --- >> tests/core_hotunplug.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/tests/core_hotunplug.c b/tests/core_hotunplug.c >> index 7c9dae1bf..3a612fce2 100644 >> --- a/tests/core_hotunplug.c >> +++ b/tests/core_hotunplug.c >> @@ -696,8 +696,8 @@ int igt_main() >> int fd_drm; >> char driver[32] = {}; >> >> - fd_drm = __drm_open_driver(DRIVER_ANY); >> - igt_skip_on_f(fd_drm < 0, "No known DRM device found\n"); >> + fd_drm = __drm_open_driver_render(DRIVER_ANY); >> + igt_skip_on_f(fd_drm < 0, "No known DRM render device found\n"); >> >> priv.chipset = drm_get_chipset(fd_drm); >> /* Make sure it opens the same driver */ >> -- >> 2.52.0 >>