[PATCH v2] drm/amd/amdgpu: S4 issue for amdgpu

[jimqu]

reset the asic if adapter is not powerdown when doing freeze()
thaw() and restore(), in order to get a valid state of adapter.

Change-Id: Ibb03ab3c2ce6ef3c83affbe767308dc22474f563
Signed-off-by: JimQu <Jim.Qu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 +++++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    | 18 ++++++++++++++++--
 2 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 6510514..f17fc6d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1937,6 +1937,10 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
 		/* Shut down the device */
 		pci_disable_device(dev->pdev);
 		pci_set_power_state(dev->pdev, PCI_D3hot);
+	} else {
+		r = amdgpu_asic_reset(adev);
+		if (r)
+			DRM_ERROR("amdgpu asic reset failed\n");
 	}
 
 	if (fbcon) {
@@ -1967,22 +1971,25 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 	    dev->switch_power_state == DRM_SWITCH_POWER_DYNAMIC_OFF)
 		return 0;
 
-	if (fbcon) {
+	if (fbcon)
 		console_lock();
-	}
+
 	if (resume) {
 		pci_set_power_state(dev->pdev, PCI_D0);
 		pci_restore_state(dev->pdev);
-		if (pci_enable_device(dev->pdev)) {
+		if (r = pci_enable_device(dev->pdev)) {
 			if (fbcon)
 				console_unlock();
-			return -1;
+			return r;
 		}
 	}
 
 	/* post card */
-	if (!amdgpu_card_posted(adev))
-		amdgpu_atom_asic_init(adev->mode_info.atom_context);
+	if (!amdgpu_card_posted(adev) || !resume) {
+		r = amdgpu_atom_asic_init(adev->mode_info.atom_context);
+		if (r)
+			DRM_ERROR("amdgpu asic init failed\n");
+	}
 
 	r = amdgpu_resume(adev);
 	if (r)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 21b8cd6..c00f4a8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -520,6 +520,20 @@ static int amdgpu_pmops_thaw(struct device *dev)
 	return amdgpu_device_resume(drm_dev, false, true);
 }
 
+static int amdgpu_pmops_poweroff(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	return amdgpu_device_suspend(drm_dev, true, true);
+}
+
+static int amdgpu_pmops_restore(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	return amdgpu_device_resume(drm_dev, false, true);
+}
+
 static int amdgpu_pmops_runtime_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
@@ -622,8 +636,8 @@ static const struct dev_pm_ops amdgpu_pm_ops = {
 	.resume = amdgpu_pmops_resume,
 	.freeze = amdgpu_pmops_freeze,
 	.thaw = amdgpu_pmops_thaw,
-	.poweroff = amdgpu_pmops_freeze,
-	.restore = amdgpu_pmops_resume,
+	.poweroff = amdgpu_pmops_poweroff,
+	.restore = amdgpu_pmops_restore,
 	.runtime_suspend = amdgpu_pmops_runtime_suspend,
 	.runtime_resume = amdgpu_pmops_runtime_resume,
 	.runtime_idle = amdgpu_pmops_runtime_idle,
-- 
1.9.1