drm/radeon: enable SRBM timeout interrupt on EG/NI

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 24242a7..ebe68dd 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -962,6 +962,8 @@
 	}
 
 	WREG32(GRBM_CNTL, GRBM_READ_TIMEOUT(0xff));
+	WREG32(SRBM_INT_CNTL, 0x1);
+	WREG32(SRBM_INT_ACK, 0x1);
 
 	evergreen_fix_pci_max_read_req_size(rdev);