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b=yvoy4QEhdx6lc/WxrTgZHp4poqHP4SU2Pk8pLv+TthQ/h2VfDdu+Hd55Fcx4bPNh3uSABIWHCFimI8T+MXP9uK4aouUY7LCJvF87TZmXIhAWtoilpyBBs1JjJRxj87TUrKRIilOJORX1wOg/hccma0nJByVQ+oHEAWzQak9qJ/M= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from DS0PR12MB7804.namprd12.prod.outlook.com (2603:10b6:8:142::5) by DS7PR12MB5814.namprd12.prod.outlook.com (2603:10b6:8:76::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8901.26; Thu, 10 Jul 2025 13:22:38 +0000 Received: from DS0PR12MB7804.namprd12.prod.outlook.com ([fe80::8327:d71a:ce21:a290]) by DS0PR12MB7804.namprd12.prod.outlook.com ([fe80::8327:d71a:ce21:a290%4]) with mapi id 15.20.8880.023; Thu, 10 Jul 2025 13:22:38 +0000 Message-ID: <8d579b3e-b2a4-4209-876e-99deceaceb48@amd.com> Date: Thu, 10 Jul 2025 18:52:26 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 5/5] drm/amdgpu: do not resume device in thaw for normal hibernation To: Samuel Zhang , alexander.deucher@amd.com, christian.koenig@amd.com, rafael@kernel.org, len.brown@intel.com, pavel@kernel.org, gregkh@linuxfoundation.org, dakr@kernel.org, airlied@gmail.com, simona@ffwll.ch, ray.huang@amd.com, matthew.auld@intel.com, matthew.brost@intel.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de Cc: mario.limonciello@amd.com, victor.zhao@amd.com, haijun.chang@amd.com, Qing.Ma@amd.com, Owen.Zhang2@amd.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org References: <20250710062313.3226149-1-guoqing.zhang@amd.com> <20250710062313.3226149-6-guoqing.zhang@amd.com> Content-Language: en-US From: "Lazar, Lijo" In-Reply-To: <20250710062313.3226149-6-guoqing.zhang@amd.com> Content-Type: text/plain; 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Skip resume in this case > can reduce the hibernation time. > > On VM with 8 * 192GB VRAM dGPUs, 98% VRAM usage and 1.7TB system memory, > this can save 50 minutes. > > Signed-off-by: Samuel Zhang > Tested-by: Mario Limonciello Reviewed-by: Lijo Lazar Thanks, Lijo > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > index 1c54b2e5a225..021defca9b61 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c > @@ -2541,6 +2541,10 @@ amdgpu_pci_shutdown(struct pci_dev *pdev) > if (amdgpu_ras_intr_triggered()) > return; > > + /* device maybe not resumed here, return immediately in this case */ > + if (adev->in_s4 && adev->in_suspend) > + return; > + > /* if we are running in a VM, make sure the device > * torn down properly on reboot/shutdown. > * unfortunately we can't detect certain > @@ -2557,6 +2561,10 @@ static int amdgpu_pmops_prepare(struct device *dev) > struct drm_device *drm_dev = dev_get_drvdata(dev); > struct amdgpu_device *adev = drm_to_adev(drm_dev); > > + /* device maybe not resumed here, return immediately in this case */ > + if (adev->in_s4 && adev->in_suspend) > + return 0; > + > /* Return a positive number here so > * DPM_FLAG_SMART_SUSPEND works properly > */ > @@ -2655,12 +2663,21 @@ static int amdgpu_pmops_thaw(struct device *dev) > { > struct drm_device *drm_dev = dev_get_drvdata(dev); > > + /* do not resume device if it's normal hibernation */ > + if (!pm_hibernate_is_recovering()) > + return 0; > + > return amdgpu_device_resume(drm_dev, true); > } > > static int amdgpu_pmops_poweroff(struct device *dev) > { > struct drm_device *drm_dev = dev_get_drvdata(dev); > + struct amdgpu_device *adev = drm_to_adev(drm_dev); > + > + /* device maybe not resumed here, return immediately in this case */ > + if (adev->in_s4 && adev->in_suspend) > + return 0; > > return amdgpu_device_suspend(drm_dev, true); > }