drm/amdgpu/uvd: reduce IB parsing overhead on UVD5+ (v2)

UVD 5 and newer do not have the same placement limitations
as older chips, so skip the first pass since it's just
overhead on chips where we don't have to force placement.

v2: fix inverted logic

Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	int r;
 
 	mapping = amdgpu_cs_find_mapping(ctx->parser, addr, &bo);
-	if (mapping == NULL)
+	if (mapping == NULL) {
+		DRM_ERROR("Can't find BO for addr 0x%08Lx\n", addr);
 		return -EINVAL;
+	}
 
 	start = amdgpu_bo_gpu_offset(bo);
 
···
 	ctx.buf_sizes = buf_sizes;
 	ctx.ib_idx = ib_idx;
 
-	/* first round, make sure the buffers are actually in the UVD segment */
-	r = amdgpu_uvd_cs_packets(&ctx, amdgpu_uvd_cs_pass1);
-	if (r)
-		return r;
+	/* first round only required on chips without UVD 64 bit address support */
+	if (!parser->adev->uvd.address_64_bit) {
+		/* first round, make sure the buffers are actually in the UVD segment */
+		r = amdgpu_uvd_cs_packets(&ctx, amdgpu_uvd_cs_pass1);
+		if (r)
+			return r;
+	}
 
 	/* second round, patch buffer addresses into the command stream */
 	r = amdgpu_uvd_cs_packets(&ctx, amdgpu_uvd_cs_pass2);