drm/radeon: remove radeon_ring_index()

Just store the index in the ring structure.
Idea taken from one of Jerome's wip rptr patches.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index c48c354..c5828b9 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -207,21 +207,6 @@
 	ring->ring_free_dw--;
 }
 
-int radeon_ring_index(struct radeon_device *rdev, struct radeon_ring *ring)
-{
-	/* r1xx-r5xx only has CP ring */
-	if (rdev->family < CHIP_R600)
-		return RADEON_RING_TYPE_GFX_INDEX;
-
-	if (rdev->family >= CHIP_CAYMAN) {
-		if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP1_INDEX])
-			return CAYMAN_RING_TYPE_CP1_INDEX;
-		else if (ring == &rdev->ring[CAYMAN_RING_TYPE_CP2_INDEX])
-			return CAYMAN_RING_TYPE_CP2_INDEX;
-	}
-	return RADEON_RING_TYPE_GFX_INDEX;
-}
-
 void radeon_ring_free_size(struct radeon_device *rdev, struct radeon_ring *ring)
 {
 	u32 rptr;
@@ -253,7 +238,7 @@
 		if (ndw < ring->ring_free_dw) {
 			break;
 		}
-		r = radeon_fence_wait_next_locked(rdev, radeon_ring_index(rdev, ring));
+		r = radeon_fence_wait_next_locked(rdev, ring->idx);
 		if (r)
 			return r;
 	}
@@ -382,7 +367,6 @@
 			    uint32_t **data)
 {
 	unsigned size, ptr, i;
-	int ridx = radeon_ring_index(rdev, ring);
 
 	/* just in case lock the ring */
 	mutex_lock(&rdev->ring_lock);
@@ -394,7 +378,7 @@
 	}
 
 	/* it doesn't make sense to save anything if all fences are signaled */
-	if (!radeon_fence_count_emitted(rdev, ridx)) {
+	if (!radeon_fence_count_emitted(rdev, ring->idx)) {
 		mutex_unlock(&rdev->ring_lock);
 		return 0;
 	}