drm/kms: disable/enable poll around switcheroo on/off

Because we aren't in a suspend state the poll will still run when we have switcherooed a card off.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_crtc_helper.c

@@ -860,19 +860,24 @@ static void output_poll_execute(struct slow_work *work)
 	}
 }
 
-void drm_kms_helper_poll_init(struct drm_device *dev)
+void drm_kms_helper_poll_disable(struct drm_device *dev)
+{
+	if (!dev->mode_config.poll_enabled)
+		return;
+	delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_disable);
+
+void drm_kms_helper_poll_enable(struct drm_device *dev)
 {
-	struct drm_connector *connector;
 	bool poll = false;
+	struct drm_connector *connector;
 	int ret;
 
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (connector->polled)
 			poll = true;
 	}
-	slow_work_register_user(THIS_MODULE);
-	delayed_slow_work_init(&dev->mode_config.output_poll_slow_work,
-			       &output_poll_ops);
 
 	if (poll) {
 		ret = delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, DRM_OUTPUT_POLL_PERIOD);
@@ -880,11 +885,22 @@ void drm_kms_helper_poll_init(struct drm_device *dev)
 			DRM_ERROR("delayed enqueue failed %d\n", ret);
 	}
 }
+EXPORT_SYMBOL(drm_kms_helper_poll_enable);
+
+void drm_kms_helper_poll_init(struct drm_device *dev)
+{
+	slow_work_register_user(THIS_MODULE);
+	delayed_slow_work_init(&dev->mode_config.output_poll_slow_work,
+			       &output_poll_ops);
+	dev->mode_config.poll_enabled = true;
+
+	drm_kms_helper_poll_enable(dev);
+}
 EXPORT_SYMBOL(drm_kms_helper_poll_init);
 
 void drm_kms_helper_poll_fini(struct drm_device *dev)
 {
-	delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
+	drm_kms_helper_poll_disable(dev);
 	slow_work_unregister_user(THIS_MODULE);
 }
 EXPORT_SYMBOL(drm_kms_helper_poll_fini);

drivers/gpu/drm/i915/i915_dma.c

@@ -1399,12 +1399,14 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
 	struct drm_device *dev = pci_get_drvdata(pdev);
 	pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 	if (state == VGA_SWITCHEROO_ON) {
-		printk(KERN_INFO "i915: switched off\n");
+		printk(KERN_INFO "i915: switched on\n");
 		/* i915 resume handler doesn't set to D0 */
 		pci_set_power_state(dev->pdev, PCI_D0);
 		i915_resume(dev);
+		drm_kms_helper_poll_enable(dev);
 	} else {
 		printk(KERN_ERR "i915: switched off\n");
+		drm_kms_helper_poll_disable(dev);
 		i915_suspend(dev, pmm);
 	}
 }

drivers/gpu/drm/nouveau/nouveau_state.c

@@ -376,12 +376,15 @@ nouveau_card_init_channel(struct drm_device *dev)
 static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
 					 enum vga_switcheroo_state state)
 {
+	struct drm_device *dev = pci_get_drvdata(pdev);
 	pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 	if (state == VGA_SWITCHEROO_ON) {
 		printk(KERN_ERR "VGA switcheroo: switched nouveau on\n");
 		nouveau_pci_resume(pdev);
+		drm_kms_helper_poll_enable(dev);
 	} else {
 		printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
+		drm_kms_helper_poll_disable(dev);
 		nouveau_pci_suspend(pdev, pmm);
 	}
 }

drivers/gpu/drm/radeon/radeon_device.c

@@ -546,8 +546,10 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
 		/* don't suspend or resume card normally */
 		rdev->powered_down = false;
 		radeon_resume_kms(dev);
+		drm_kms_helper_poll_enable(dev);
 	} else {
 		printk(KERN_INFO "radeon: switched off\n");
+		drm_kms_helper_poll_disable(dev);
 		radeon_suspend_kms(dev, pmm);
 		/* don't suspend or resume card normally */
 		rdev->powered_down = true;

include/drm/drm_crtc_helper.h

@@ -130,4 +130,7 @@ extern int drm_helper_resume_force_mode(struct drm_device *dev);
 extern void drm_kms_helper_poll_init(struct drm_device *dev);
 extern void drm_kms_helper_poll_fini(struct drm_device *dev);
 extern void drm_helper_hpd_irq_event(struct drm_device *dev);
+
+extern void drm_kms_helper_poll_disable(struct drm_device *dev);
+extern void drm_kms_helper_poll_enable(struct drm_device *dev);
 #endif