drm/amdgpu: remove page flip work queue v3

Just use the system queue now that we don't block any more.

v2: handle DAL as well.
v3: agd: split DAL changes out

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Mykola Lysenko <mykola.lysenko@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com> (v1)

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

@@ -39,11 +39,9 @@ static void amdgpu_flip_callback(struct fence *f, struct fence_cb *cb)
 {
 	struct amdgpu_flip_work *work =
 		container_of(cb, struct amdgpu_flip_work, cb);
-	struct amdgpu_device *adev = work->adev;
-	struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[work->crtc_id];
 
 	fence_put(f);
-	queue_work(amdgpu_crtc->pflip_queue, &work->flip_work);
+	schedule_work(&work->flip_work);
 }
 
 static bool amdgpu_flip_handle_fence(struct amdgpu_flip_work *work,

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

@@ -390,7 +390,6 @@ struct amdgpu_crtc {
 	struct drm_display_mode native_mode;
 	u32 pll_id;
 	/* page flipping */
-	struct workqueue_struct *pflip_queue;
 	struct amdgpu_flip_work *pflip_works;
 	enum amdgpu_flip_status pflip_status;
 	int deferred_flip_completion;

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

@@ -2670,7 +2670,6 @@ static void dce_v10_0_crtc_destroy(struct drm_crtc *crtc)
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 
 	drm_crtc_cleanup(crtc);
-	destroy_workqueue(amdgpu_crtc->pflip_queue);
 	kfree(amdgpu_crtc);
 }
 
@@ -2890,7 +2889,6 @@ static int dce_v10_0_crtc_init(struct amdgpu_device *adev, int index)
 
 	drm_mode_crtc_set_gamma_size(&amdgpu_crtc->base, 256);
 	amdgpu_crtc->crtc_id = index;
-	amdgpu_crtc->pflip_queue = create_singlethread_workqueue("amdgpu-pageflip-queue");
 	adev->mode_info.crtcs[index] = amdgpu_crtc;
 
 	amdgpu_crtc->max_cursor_width = 128;
@@ -3366,7 +3364,7 @@ static int dce_v10_0_pageflip_irq(struct amdgpu_device *adev,
 	spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
 
 	drm_vblank_put(adev->ddev, amdgpu_crtc->crtc_id);
-	queue_work(amdgpu_crtc->pflip_queue, &works->unpin_work);
+	schedule_work(&works->unpin_work);
 
 	return 0;
 }

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

@@ -2661,7 +2661,6 @@ static void dce_v11_0_crtc_destroy(struct drm_crtc *crtc)
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 
 	drm_crtc_cleanup(crtc);
-	destroy_workqueue(amdgpu_crtc->pflip_queue);
 	kfree(amdgpu_crtc);
 }
 
@@ -2881,7 +2880,6 @@ static int dce_v11_0_crtc_init(struct amdgpu_device *adev, int index)
 
 	drm_mode_crtc_set_gamma_size(&amdgpu_crtc->base, 256);
 	amdgpu_crtc->crtc_id = index;
-	amdgpu_crtc->pflip_queue = create_singlethread_workqueue("amdgpu-pageflip-queue");
 	adev->mode_info.crtcs[index] = amdgpu_crtc;
 
 	amdgpu_crtc->max_cursor_width = 128;
@@ -3361,7 +3359,7 @@ static int dce_v11_0_pageflip_irq(struct amdgpu_device *adev,
 	spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
 
 	drm_vblank_put(adev->ddev, amdgpu_crtc->crtc_id);
-	queue_work(amdgpu_crtc->pflip_queue, &works->unpin_work);
+	schedule_work(&works->unpin_work);
 
 	return 0;
 }

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

@@ -2582,7 +2582,6 @@ static void dce_v8_0_crtc_destroy(struct drm_crtc *crtc)
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 
 	drm_crtc_cleanup(crtc);
-	destroy_workqueue(amdgpu_crtc->pflip_queue);
 	kfree(amdgpu_crtc);
 }
 
@@ -2809,7 +2808,6 @@ static int dce_v8_0_crtc_init(struct amdgpu_device *adev, int index)
 
 	drm_mode_crtc_set_gamma_size(&amdgpu_crtc->base, 256);
 	amdgpu_crtc->crtc_id = index;
-	amdgpu_crtc->pflip_queue = create_singlethread_workqueue("amdgpu-pageflip-queue");
 	adev->mode_info.crtcs[index] = amdgpu_crtc;
 
 	amdgpu_crtc->max_cursor_width = CIK_CURSOR_WIDTH;
@@ -3375,7 +3373,7 @@ static int dce_v8_0_pageflip_irq(struct amdgpu_device *adev,
 	spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
 
 	drm_vblank_put(adev->ddev, amdgpu_crtc->crtc_id);
-	queue_work(amdgpu_crtc->pflip_queue, &works->unpin_work);
+	schedule_work(&works->unpin_work);
 
 	return 0;
 }