drm/amd/powerplay: enable mmhub pg

mmhub pg can be obvserved from PCTL_CTRL
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -704,7 +704,8 @@ static int nv_common_early_init(void *handle)
 		adev->pg_flags = AMD_PG_SUPPORT_VCN |
 			AMD_PG_SUPPORT_VCN_DPG |
 			AMD_PG_SUPPORT_JPEG |
-			AMD_PG_SUPPORT_ATHUB;
+			AMD_PG_SUPPORT_ATHUB |
+			AMD_PG_SUPPORT_MMHUB;
 		/* guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0,
 		 * as a consequence, the rev_id and external_rev_id are wrong.
 		 * workaround it by hardcoding rev_id to 0 (default value).

drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c

@@ -335,6 +335,9 @@ sienna_cichlid_get_allowed_feature_mask(struct smu_context *smu,
 	if (smu->adev->pg_flags & AMD_PG_SUPPORT_ATHUB)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_ATHUB_PG_BIT);
 
+	if (smu->adev->pg_flags & AMD_PG_SUPPORT_MMHUB)
+		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_MMHUB_PG_BIT);
+
 	if (smu->adev->pg_flags & AMD_PG_SUPPORT_VCN ||
 	    smu->adev->pg_flags & AMD_PG_SUPPORT_JPEG)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_MM_DPM_PG_BIT);