drm/radeon: consolidate cik uvd initialization and startup code.

This match the exact same control flow as existing code. It just
use goto instead of multiple levels of if/else. It also clarify
early initialization failures by clearing rdev->has_uvd doing so
does not change end result from hardware point of view, it only
avoids printing more error messages down the line and thus only
the original error is reported.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/cik.c

@@ -8137,6 +8137,78 @@ int cik_irq_process(struct radeon_device *rdev)
 /*
  * startup/shutdown callbacks
  */
+static void cik_uvd_init(struct radeon_device *rdev)
+{
+	int r;
+
+	if (!rdev->has_uvd)
+		return;
+
+	r = radeon_uvd_init(rdev);
+	if (r) {
+		dev_err(rdev->dev, "failed UVD (%d) init.\n", r);
+		/*
+		 * At this point rdev->uvd.vcpu_bo is NULL which trickles down
+		 * to early fails cik_uvd_start() and thus nothing happens
+		 * there. So it is pointless to try to go through that code
+		 * hence why we disable uvd here.
+		 */
+		rdev->has_uvd = 0;
+		return;
+	}
+	rdev->ring[R600_RING_TYPE_UVD_INDEX].ring_obj = NULL;
+	r600_ring_init(rdev, &rdev->ring[R600_RING_TYPE_UVD_INDEX], 4096);
+}
+
+static void cik_uvd_start(struct radeon_device *rdev)
+{
+	int r;
+
+	if (!rdev->has_uvd)
+		return;
+
+	r = radeon_uvd_resume(rdev);
+	if (r) {
+		dev_err(rdev->dev, "failed UVD resume (%d).\n", r);
+		goto error;
+	}
+	r = uvd_v4_2_resume(rdev);
+	if (r) {
+		dev_err(rdev->dev, "failed UVD 4.2 resume (%d).\n", r);
+		goto error;
+	}
+	r = radeon_fence_driver_start_ring(rdev, R600_RING_TYPE_UVD_INDEX);
+	if (r) {
+		dev_err(rdev->dev, "failed initializing UVD fences (%d).\n", r);
+		goto error;
+	}
+	return;
+
+error:
+	rdev->ring[R600_RING_TYPE_UVD_INDEX].ring_size = 0;
+}
+
+static void cik_uvd_resume(struct radeon_device *rdev)
+{
+	struct radeon_ring *ring;
+	int r;
+
+	if (!rdev->has_uvd || !rdev->ring[R600_RING_TYPE_UVD_INDEX].ring_size)
+		return;
+
+	ring = &rdev->ring[R600_RING_TYPE_UVD_INDEX];
+	r = radeon_ring_init(rdev, ring, ring->ring_size, 0, RADEON_CP_PACKET2);
+	if (r) {
+		dev_err(rdev->dev, "failed initializing UVD ring (%d).\n", r);
+		return;
+	}
+	r = uvd_v1_0_init(rdev);
+	if (r) {
+		dev_err(rdev->dev, "failed initializing UVD (%d).\n", r);
+		return;
+	}
+}
+
 /**
  * cik_startup - program the asic to a functional state
  *
@@ -8239,18 +8311,7 @@ static int cik_startup(struct radeon_device *rdev)
 		return r;
 	}
 
-	r = radeon_uvd_resume(rdev);
-	if (!r) {
-		r = uvd_v4_2_resume(rdev);
-		if (!r) {
-			r = radeon_fence_driver_start_ring(rdev,
-							   R600_RING_TYPE_UVD_INDEX);
-			if (r)
-				dev_err(rdev->dev, "UVD fences init error (%d).\n", r);
-		}
-	}
-	if (r)
-		rdev->ring[R600_RING_TYPE_UVD_INDEX].ring_size = 0;
+	cik_uvd_start(rdev);
 
 	r = radeon_vce_resume(rdev);
 	if (!r) {
@@ -8342,15 +8403,7 @@ static int cik_startup(struct radeon_device *rdev)
 	if (r)
 		return r;
 
-	ring = &rdev->ring[R600_RING_TYPE_UVD_INDEX];
-	if (ring->ring_size) {
-		r = radeon_ring_init(rdev, ring, ring->ring_size, 0,
-				     RADEON_CP_PACKET2);
-		if (!r)
-			r = uvd_v1_0_init(rdev);
-		if (r)
-			DRM_ERROR("radeon: failed initializing UVD (%d).\n", r);
-	}
+	cik_uvd_resume(rdev);
 
 	r = -ENOENT;
 
@@ -8443,8 +8496,10 @@ int cik_suspend(struct radeon_device *rdev)
 	radeon_vm_manager_fini(rdev);
 	cik_cp_enable(rdev, false);
 	cik_sdma_enable(rdev, false);
+	if (rdev->has_uvd) {
 		uvd_v1_0_fini(rdev);
 		radeon_uvd_suspend(rdev);
+	}
 	radeon_vce_suspend(rdev);
 	cik_fini_pg(rdev);
 	cik_fini_cg(rdev);
@@ -8571,12 +8626,7 @@ int cik_init(struct radeon_device *rdev)
 	ring->ring_obj = NULL;
 	r600_ring_init(rdev, ring, 256 * 1024);
 
-	r = radeon_uvd_init(rdev);
-	if (!r) {
-		ring = &rdev->ring[R600_RING_TYPE_UVD_INDEX];
-		ring->ring_obj = NULL;
-		r600_ring_init(rdev, ring, 4096);
-	}
+	cik_uvd_init(rdev);
 
 	r = radeon_vce_init(rdev);
 	if (!r) {