drm/amd/amdgpu: S4 issue for amdgpu (v2)

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

v2: squash in warning fix from Rex

Signed-off-by: JimQu <Jim.Qu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Tested By: Shawn Starr <shawn.starr@rogers.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 1aa0364d7961..d324a079fe9b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1895,6 +1895,10 @@ 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) {
@@ -1925,22 +1929,26 @@ 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)) {
+                r = pci_enable_device(dev->pdev);
+                if (r) {
                         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)