drm/amd/amdgpu: fw version check with gfxoff

1. check the firmware version when enabling gfxoff
2. overwrite the pptable to make sure gfxoff is really
enabled on navi10
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -331,7 +331,6 @@ static int smu_set_funcs(struct amdgpu_device *adev)
 	switch (adev->asic_type) {
 	case CHIP_VEGA20:
 	case CHIP_NAVI10:
-		adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
 		if (adev->pm.pp_feature & PP_OVERDRIVE_MASK)
 			smu->od_enabled = true;
 		smu_v11_0_set_smu_funcs(smu);

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -117,6 +117,8 @@ static int
 navi10_get_allowed_feature_mask(struct smu_context *smu,
 				  uint32_t *feature_mask, uint32_t num)
 {
+	struct amdgpu_device *adev = smu->adev;
+
 	if (num > 2)
 		return -EINVAL;
 
@@ -139,6 +141,10 @@ navi10_get_allowed_feature_mask(struct smu_context *smu,
 				| FEATURE_MASK(FEATURE_MMHUB_PG)
 				| FEATURE_MASK(FEATURE_ATHUB_PG);
 
+	if (adev->pm.pp_feature & PP_GFXOFF_MASK)
+		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_GFX_SS_BIT)
+				| FEATURE_MASK(FEATURE_GFXOFF_BIT);
+
 	return 0;
 }
 
@@ -149,6 +155,7 @@ static int navi10_check_powerplay_table(struct smu_context *smu)
 
 static int navi10_append_powerplay_table(struct smu_context *smu)
 {
+	struct amdgpu_device *adev = smu->adev;
 	struct smu_table_context *table_context = &smu->smu_table;
 	PPTable_t *smc_pptable = table_context->driver_pptable;
 	struct atom_smc_dpm_info_v4_5 *smc_dpm_table;
@@ -234,6 +241,10 @@ static int navi10_append_powerplay_table(struct smu_context *smu)
 	/* Mvdd Svi2 Div Ratio Setting */
 	smc_pptable->MvddRatio = smc_dpm_table->MvddRatio;
 
+	if (adev->pm.pp_feature & PP_GFXOFF_MASK)
+		*(uint64_t *)smc_pptable->FeaturesToRun |= FEATURE_MASK(FEATURE_GFX_SS_BIT)
+					| FEATURE_MASK(FEATURE_GFXOFF_BIT);
+
 	return 0;
 }