drm/amdgpu: load MEC ucode manually on iceland

BugLink: http://bugs.launchpad.net/bugs/1546572

The smc doesn't handle it.
Reviewed-by: Ken Wang <Qingqing.Wang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
(cherry picked from commit 951e0962)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -4352,10 +4352,16 @@ static int gfx_v8_0_cp_resume(struct amdgpu_device *adev)
 			if (r)
 				return -EINVAL;
 
-			r = adev->smu.smumgr_funcs->check_fw_load_finish(adev,
-							AMDGPU_UCODE_ID_CP_MEC1);
-			if (r)
-				return -EINVAL;
+			if (adev->asic_type == CHIP_TOPAZ) {
+				r = gfx_v8_0_cp_compute_load_microcode(adev);
+				if (r)
+					return r;
+			} else {
+				r = adev->smu.smumgr_funcs->check_fw_load_finish(adev,
+										 AMDGPU_UCODE_ID_CP_MEC1);
+				if (r)
+					return -EINVAL;
+			}
 		}
 	}