drm/amd/powerplay: enable athub pg

enable athub pg and the status can be checked in
ATHUB_MISC_CNTL.
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

@@ -725,7 +725,8 @@ static int nv_common_early_init(void *handle)
 			AMD_CG_SUPPORT_IH_CG |
 			AMD_CG_SUPPORT_MC_LS;
 		adev->pg_flags = AMD_PG_SUPPORT_VCN |
-			AMD_PG_SUPPORT_JPEG;
+			AMD_PG_SUPPORT_JPEG |
+			AMD_PG_SUPPORT_ATHUB;
 		adev->external_rev_id = adev->rev_id + 0x28;
 		break;
 	default:

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

@@ -332,6 +332,9 @@ sienna_cichlid_get_allowed_feature_mask(struct smu_context *smu,
 	if (adev->pm.pp_feature & PP_SCLK_DEEP_SLEEP_MASK)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DS_GFXCLK_BIT);
 
+	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_VCN ||
 	    smu->adev->pg_flags & AMD_PG_SUPPORT_JPEG)
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_MM_DPM_PG_BIT);