diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index a71688d1c1b14706d7fc5abb9dbc36d5b6671599..78498d1d17697e08745482969520c8b536d72fca 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -537,6 +537,7 @@ void amdgpu_gmc_tmz_set(struct amdgpu_device *adev)
 	case CHIP_NAVI12:
 	case CHIP_VANGOGH:
 	case CHIP_YELLOW_CARP:
+	case CHIP_IP_DISCOVERY:
 		/* Don't enable it by default yet.
 		 */
 		if (amdgpu_tmz < 1) {