[PATCH] 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: Id2e4587c06b556eb651ab9277ffc903f780dea56
Signed-off-by: JimQu <Jim.Qu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 23 +++++++++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  4 ++--
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 52cec16..5fc76bbf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1936,8 +1936,14 @@ 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");
 	}
 
+	amdgpu_atombios_fini(adev);
+
 	if (fbcon) {
 		console_lock();
 		amdgpu_fbdev_set_suspend(adev, 1);
@@ -1965,21 +1971,23 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
 
-	if (fbcon) {
+	if (fbcon)
 		console_lock();
-	}
+
+	amdgpu_atombios_init(adev);
+
 	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))
+	if (!amdgpu_card_posted(adev) || !resume)
 		amdgpu_atom_asic_init(adev->mode_info.atom_context);
 
 	r = amdgpu_resume(adev);
@@ -1998,8 +2006,11 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 	}
 
 	r = amdgpu_late_init(adev);
-	if (r)
+	if (r) {
+		if (fbcon)
+			console_unlock();
 		return r;
+	}
 
 	/* pin cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 06816cf..02941db3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -601,8 +601,8 @@ 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_suspend,
+	.restore = amdgpu_pmops_thaw,
 	.runtime_suspend = amdgpu_pmops_runtime_suspend,
 	.runtime_resume = amdgpu_pmops_runtime_resume,
 	.runtime_idle = amdgpu_pmops_runtime_idle,
-- 
1.9.1