drm/amdgpu/gfx8: Enable PG on Stoney

Signed-off-by: NTom St Denis <tom.stdenis@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -1249,7 +1249,12 @@ static int vi_common_early_init(void *handle)
 			AMD_CG_SUPPORT_HDP_LS |
 			AMD_CG_SUPPORT_SDMA_MGCG |
 			AMD_CG_SUPPORT_SDMA_LS;
-		adev->pg_flags = 0;
+		adev->pg_flags = AMD_PG_SUPPORT_GFX_PG |
+			AMD_PG_SUPPORT_GFX_SMG |
+			AMD_PG_SUPPORT_GFX_DMG |
+			AMD_PG_SUPPORT_GFX_PIPELINE |
+			AMD_PG_SUPPORT_CP |
+			AMD_PG_SUPPORT_RLC_SMU_HS;
 		adev->external_rev_id = adev->rev_id + 0x1;
 		break;
 	default: