drm/amdgpu: move non-DC vblank handling out of irq code

Move it into the DCE code for each generation. This avoids
confusion with the different display paths.

v2: no need for a hotplug worker for vkms
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -44,6 +44,41 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_vblank.h>
 
+/**
+ * amdgpu_display_hotplug_work_func - work handler for display hotplug event
+ *
+ * @work: work struct pointer
+ *
+ * This is the hotplug event work handler (all ASICs).
+ * The work gets scheduled from the IRQ handler if there
+ * was a hotplug interrupt.  It walks through the connector table
+ * and calls hotplug handler for each connector. After this, it sends
+ * a DRM hotplug event to alert userspace.
+ *
+ * This design approach is required in order to defer hotplug event handling
+ * from the IRQ handler to a work handler because hotplug handler has to use
+ * mutexes which cannot be locked in an IRQ handler (since &mutex_lock may
+ * sleep).
+ */
+void amdgpu_display_hotplug_work_func(struct work_struct *work)
+{
+	struct amdgpu_device *adev = container_of(work, struct amdgpu_device,
+						  hotplug_work);
+	struct drm_device *dev = adev_to_drm(adev);
+	struct drm_mode_config *mode_config = &dev->mode_config;
+	struct drm_connector *connector;
+	struct drm_connector_list_iter iter;
+
+	mutex_lock(&mode_config->mutex);
+	drm_connector_list_iter_begin(dev, &iter);
+	drm_for_each_connector_iter(connector, &iter)
+		amdgpu_connector_hotplug(connector);
+	drm_connector_list_iter_end(&iter);
+	mutex_unlock(&mode_config->mutex);
+	/* Just fire off a uevent and let userspace tell us what to do */
+	drm_helper_hpd_irq_event(dev);
+}
+
 static int amdgpu_display_framebuffer_init(struct drm_device *dev,
 					   struct amdgpu_framebuffer *rfb,
 					   const struct drm_mode_fb_cmd2 *mode_cmd,

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

@@ -35,6 +35,7 @@
 #define amdgpu_display_add_encoder(adev, e, s, c) (adev)->mode_info.funcs->add_encoder((adev), (e), (s), (c))
 #define amdgpu_display_add_connector(adev, ci, sd, ct, ib, coi, h, r) (adev)->mode_info.funcs->add_connector((adev), (ci), (sd), (ct), (ib), (coi), (h), (r))
 
+void amdgpu_display_hotplug_work_func(struct work_struct *work);
 void amdgpu_display_update_priority(struct amdgpu_device *adev);
 uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
 					  uint64_t bo_flags);

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

@@ -100,41 +100,6 @@ const char *soc15_ih_clientid_name[] = {
 	"MP1"
 };
 
-/**
- * amdgpu_hotplug_work_func - work handler for display hotplug event
- *
- * @work: work struct pointer
- *
- * This is the hotplug event work handler (all ASICs).
- * The work gets scheduled from the IRQ handler if there
- * was a hotplug interrupt.  It walks through the connector table
- * and calls hotplug handler for each connector. After this, it sends
- * a DRM hotplug event to alert userspace.
- *
- * This design approach is required in order to defer hotplug event handling
- * from the IRQ handler to a work handler because hotplug handler has to use
- * mutexes which cannot be locked in an IRQ handler (since &mutex_lock may
- * sleep).
- */
-static void amdgpu_hotplug_work_func(struct work_struct *work)
-{
-	struct amdgpu_device *adev = container_of(work, struct amdgpu_device,
-						  hotplug_work);
-	struct drm_device *dev = adev_to_drm(adev);
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_connector *connector;
-	struct drm_connector_list_iter iter;
-
-	mutex_lock(&mode_config->mutex);
-	drm_connector_list_iter_begin(dev, &iter);
-	drm_for_each_connector_iter(connector, &iter)
-		amdgpu_connector_hotplug(connector);
-	drm_connector_list_iter_end(&iter);
-	mutex_unlock(&mode_config->mutex);
-	/* Just fire off a uevent and let userspace tell us what to do */
-	drm_helper_hpd_irq_event(dev);
-}
-
 /**
  * amdgpu_irq_disable_all - disable *all* interrupts
  *
@@ -317,21 +282,6 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 		}
 	}
 
-	if (!amdgpu_device_has_dc_support(adev)) {
-		if (!adev->enable_virtual_display)
-			/* Disable vblank IRQs aggressively for power-saving */
-			/* XXX: can this be enabled for DC? */
-			adev_to_drm(adev)->vblank_disable_immediate = true;
-
-		r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
-		if (r)
-			return r;
-
-		/* Pre-DCE11 */
-		INIT_WORK(&adev->hotplug_work,
-				amdgpu_hotplug_work_func);
-	}
-
 	INIT_WORK(&adev->irq.ih1_work, amdgpu_irq_handle_ih1);
 	INIT_WORK(&adev->irq.ih2_work, amdgpu_irq_handle_ih2);
 	INIT_WORK(&adev->irq.ih_soft_work, amdgpu_irq_handle_ih_soft);
@@ -345,11 +295,8 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 	/* PCI devices require shared interrupts. */
 	r = request_irq(irq, amdgpu_irq_handler, IRQF_SHARED, adev_to_drm(adev)->driver->name,
 			adev_to_drm(adev));
-	if (r) {
-		if (!amdgpu_device_has_dc_support(adev))
-			flush_work(&adev->hotplug_work);
+	if (r)
 		return r;
-	}
 	adev->irq.installed = true;
 	adev->irq.irq = irq;
 	adev_to_drm(adev)->max_vblank_count = 0x00ffffff;
@@ -366,9 +313,6 @@ void amdgpu_irq_fini_hw(struct amdgpu_device *adev)
 		adev->irq.installed = false;
 		if (adev->irq.msi_enabled)
 			pci_free_irq_vectors(adev->pdev);
-
-		if (!amdgpu_device_has_dc_support(adev))
-			flush_work(&adev->hotplug_work);
 	}
 
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);

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

@@ -511,6 +511,10 @@ static int amdgpu_vkms_sw_init(void *handle)
 			return r;
 	}
 
+	r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
+	if (r)
+		return r;
+
 	drm_kms_helper_poll_init(adev_to_drm(adev));
 
 	adev->mode_info.mode_config_initialized = true;

drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

@@ -2828,6 +2828,17 @@ static int dce_v10_0_sw_init(void *handle)
 	if (r)
 		return r;
 
+	/* Disable vblank IRQs aggressively for power-saving */
+	/* XXX: can this be enabled for DC? */
+	adev_to_drm(adev)->vblank_disable_immediate = true;
+
+	r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
+	if (r)
+		return r;
+
+	INIT_WORK(&adev->hotplug_work,
+		  amdgpu_display_hotplug_work_func);
+
 	drm_kms_helper_poll_init(adev_to_drm(adev));
 
 	adev->mode_info.mode_config_initialized = true;
@@ -2890,6 +2901,8 @@ static int dce_v10_0_hw_fini(void *handle)
 
 	dce_v10_0_pageflip_interrupt_fini(adev);
 
+	flush_work(&adev->hotplug_work);
+
 	return 0;
 }
 

drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

@@ -2947,6 +2947,17 @@ static int dce_v11_0_sw_init(void *handle)
 	if (r)
 		return r;
 
+	/* Disable vblank IRQs aggressively for power-saving */
+	/* XXX: can this be enabled for DC? */
+	adev_to_drm(adev)->vblank_disable_immediate = true;
+
+	r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
+	if (r)
+		return r;
+
+	INIT_WORK(&adev->hotplug_work,
+		  amdgpu_display_hotplug_work_func);
+
 	drm_kms_helper_poll_init(adev_to_drm(adev));
 
 	adev->mode_info.mode_config_initialized = true;
@@ -3020,6 +3031,8 @@ static int dce_v11_0_hw_fini(void *handle)
 
 	dce_v11_0_pageflip_interrupt_fini(adev);
 
+	flush_work(&adev->hotplug_work);
+
 	return 0;
 }
 

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

@@ -2705,6 +2705,18 @@ static int dce_v6_0_sw_init(void *handle)
 	if (r)
 		return r;
 
+	/* Disable vblank IRQs aggressively for power-saving */
+	/* XXX: can this be enabled for DC? */
+	adev_to_drm(adev)->vblank_disable_immediate = true;
+
+	r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
+	if (r)
+		return r;
+
+	/* Pre-DCE11 */
+	INIT_WORK(&adev->hotplug_work,
+		  amdgpu_display_hotplug_work_func);
+
 	drm_kms_helper_poll_init(adev_to_drm(adev));
 
 	return r;
@@ -2763,6 +2775,8 @@ static int dce_v6_0_hw_fini(void *handle)
 
 	dce_v6_0_pageflip_interrupt_fini(adev);
 
+	flush_work(&adev->hotplug_work);
+
 	return 0;
 }
 

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

@@ -2729,6 +2729,18 @@ static int dce_v8_0_sw_init(void *handle)
 	if (r)
 		return r;
 
+	/* Disable vblank IRQs aggressively for power-saving */
+	/* XXX: can this be enabled for DC? */
+	adev_to_drm(adev)->vblank_disable_immediate = true;
+
+	r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc);
+	if (r)
+		return r;
+
+	/* Pre-DCE11 */
+	INIT_WORK(&adev->hotplug_work,
+		  amdgpu_display_hotplug_work_func);
+
 	drm_kms_helper_poll_init(adev_to_drm(adev));
 
 	adev->mode_info.mode_config_initialized = true;
@@ -2789,6 +2801,8 @@ static int dce_v8_0_hw_fini(void *handle)
 
 	dce_v8_0_pageflip_interrupt_fini(adev);
 
+	flush_work(&adev->hotplug_work);
+
 	return 0;
 }