drm/amdgpu: move pci handling out of pm ops

The documentation says the that PCI core handles this
for you unless you choose to implement it.  Just rely
on the PCI core to handle the pci specific bits.
Reviewed-by: Zhan Liu <zhan.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1185,8 +1185,8 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv);
 void amdgpu_driver_postclose_kms(struct drm_device *dev,
 				 struct drm_file *file_priv);
 int amdgpu_device_ip_suspend(struct amdgpu_device *adev);
-int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon);
-int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon);
+int amdgpu_device_suspend(struct drm_device *dev, bool fbcon);
+int amdgpu_device_resume(struct drm_device *dev, bool fbcon);
 u32 amdgpu_get_vblank_counter_kms(struct drm_device *dev, unsigned int pipe);
 int amdgpu_enable_vblank_kms(struct drm_device *dev, unsigned int pipe);
 void amdgpu_disable_vblank_kms(struct drm_device *dev, unsigned int pipe);

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1087,6 +1087,7 @@ static int amdgpu_device_check_arguments(struct amdgpu_device *adev)
 static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 {
 	struct drm_device *dev = pci_get_drvdata(pdev);
+	int r;
 
 	if (amdgpu_device_supports_boco(dev) && state == VGA_SWITCHEROO_OFF)
 		return;
@@ -1096,7 +1097,12 @@ static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
 		/* don't suspend or resume card normally */
 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 
-		amdgpu_device_resume(dev, true, true);
+		pci_set_power_state(dev->pdev, PCI_D0);
+		pci_restore_state(dev->pdev);
+		r = pci_enable_device(dev->pdev);
+		if (r)
+			DRM_WARN("pci_enable_device failed (%d)\n", r);
+		amdgpu_device_resume(dev, true);
 
 		dev->switch_power_state = DRM_SWITCH_POWER_ON;
 		drm_kms_helper_poll_enable(dev);
@@ -1104,7 +1110,11 @@ static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
 		pr_info("amdgpu: switched off\n");
 		drm_kms_helper_poll_disable(dev);
 		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
-		amdgpu_device_suspend(dev, true, true);
+		amdgpu_device_suspend(dev, true);
+		pci_save_state(dev->pdev);
+		/* Shut down the device */
+		pci_disable_device(dev->pdev);
+		pci_set_power_state(dev->pdev, PCI_D3cold);
 		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
 	}
 }
@@ -3195,7 +3205,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
  * Returns 0 for success or an error on failure.
  * Called at driver suspend.
  */
-int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
+int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
 {
 	struct amdgpu_device *adev;
 	struct drm_crtc *crtc;
@@ -3278,13 +3288,6 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
 	 */
 	amdgpu_bo_evict_vram(adev);
 
-	if (suspend) {
-		pci_save_state(dev->pdev);
-		/* Shut down the device */
-		pci_disable_device(dev->pdev);
-		pci_set_power_state(dev->pdev, PCI_D3hot);
-	}
-
 	return 0;
 }
 
@@ -3299,7 +3302,7 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
  * Returns 0 for success or an error on failure.
  * Called at driver resume.
  */
-int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
+int amdgpu_device_resume(struct drm_device *dev, bool fbcon)
 {
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
@@ -3310,14 +3313,6 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
 
-	if (resume) {
-		pci_set_power_state(dev->pdev, PCI_D0);
-		pci_restore_state(dev->pdev);
-		r = pci_enable_device(dev->pdev);
-		if (r)
-			return r;
-	}
-
 	/* post card */
 	if (amdgpu_device_need_post(adev)) {
 		r = amdgpu_atom_asic_init(adev->mode_info.atom_context);

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -1147,7 +1147,7 @@ static int amdgpu_pmops_suspend(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
-	return amdgpu_device_suspend(drm_dev, true, true);
+	return amdgpu_device_suspend(drm_dev, true);
 }
 
 static int amdgpu_pmops_resume(struct device *dev)
@@ -1162,7 +1162,7 @@ static int amdgpu_pmops_resume(struct device *dev)
 		pm_runtime_enable(dev);
 	}
 
-	return amdgpu_device_resume(drm_dev, true, true);
+	return amdgpu_device_resume(drm_dev, true);
 }
 
 static int amdgpu_pmops_freeze(struct device *dev)
@@ -1171,7 +1171,7 @@ static int amdgpu_pmops_freeze(struct device *dev)
 	struct amdgpu_device *adev = drm_dev->dev_private;
 	int r;
 
-	r = amdgpu_device_suspend(drm_dev, false, true);
+	r = amdgpu_device_suspend(drm_dev, true);
 	if (r)
 		return r;
 	return amdgpu_asic_reset(adev);
@@ -1181,21 +1181,21 @@ static int amdgpu_pmops_thaw(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
-	return amdgpu_device_resume(drm_dev, false, true);
+	return amdgpu_device_resume(drm_dev, true);
 }
 
 static int amdgpu_pmops_poweroff(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
-	return amdgpu_device_suspend(drm_dev, true, true);
+	return amdgpu_device_suspend(drm_dev, true);
 }
 
 static int amdgpu_pmops_restore(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
 
-	return amdgpu_device_resume(drm_dev, false, true);
+	return amdgpu_device_resume(drm_dev, true);
 }
 
 static int amdgpu_pmops_runtime_suspend(struct device *dev)
@@ -1214,7 +1214,7 @@ static int amdgpu_pmops_runtime_suspend(struct device *dev)
 		drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 	drm_kms_helper_poll_disable(drm_dev);
 
-	ret = amdgpu_device_suspend(drm_dev, false, false);
+	ret = amdgpu_device_suspend(drm_dev, false);
 	if (amdgpu_device_supports_boco(drm_dev)) {
 		/* Only need to handle PCI state in the driver for ATPX
 		 * PCI core handles it for _PR3.
@@ -1264,7 +1264,7 @@ static int amdgpu_pmops_runtime_resume(struct device *dev)
 	} else if (amdgpu_device_supports_baco(drm_dev)) {
 		amdgpu_device_baco_exit(drm_dev);
 	}
-	ret = amdgpu_device_resume(drm_dev, false, false);
+	ret = amdgpu_device_resume(drm_dev, false);
 	drm_kms_helper_poll_enable(drm_dev);
 	if (amdgpu_device_supports_boco(drm_dev))
 		drm_dev->switch_power_state = DRM_SWITCH_POWER_ON;