drm/amd/pp: Add gfx pg support in smu through set_powergating_by_smu

gfx ip block can call set_powergating_by_smu to set gfx pg state if
necessary.
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -5606,14 +5606,12 @@ static int gfx_v8_0_late_init(void *handle)
 static void gfx_v8_0_enable_gfx_static_mg_power_gating(struct amdgpu_device *adev,
 						       bool enable)
 {
-	if ((adev->asic_type == CHIP_POLARIS11) ||
+	if (((adev->asic_type == CHIP_POLARIS11) ||
 	    (adev->asic_type == CHIP_POLARIS12) ||
-	    (adev->asic_type == CHIP_VEGAM))
+	    (adev->asic_type == CHIP_VEGAM)) &&
+	    adev->powerplay.pp_funcs->set_powergating_by_smu)
 		/* Send msg to SMU via Powerplay */
-		amdgpu_device_ip_set_powergating_state(adev,
-						       AMD_IP_BLOCK_TYPE_SMC,
-						       enable ?
-						       AMD_PG_STATE_GATE : AMD_PG_STATE_UNGATE);
+		amdgpu_dpm_set_powergating_by_smu(adev, AMD_IP_BLOCK_TYPE_GFX, enable);
 
 	WREG32_FIELD(RLC_PG_CNTL, STATIC_PER_CU_PG_ENABLE, enable ? 1 : 0);
 }

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

@@ -236,14 +236,7 @@ static int pp_set_powergating_state(void *handle,
 			pr_err("gfx off control failed!\n");
 	}
 
-	if (hwmgr->hwmgr_func->powergate_gfx == NULL) {
-		pr_info("%s was not implemented.\n", __func__);
-		return 0;
-	}
-
-	/* Enable/disable GFX per cu powergating through SMU */
-	return hwmgr->hwmgr_func->powergate_gfx(hwmgr,
-			state == AMD_PG_STATE_GATE);
+	return 0;
 
 }
 
@@ -1184,6 +1177,21 @@ static int pp_dpm_powergate_mmhub(void *handle)
 	return hwmgr->hwmgr_func->powergate_mmhub(hwmgr);
 }
 
+static int pp_dpm_powergate_gfx(void *handle, bool gate)
+{
+	struct pp_hwmgr *hwmgr = handle;
+
+	if (!hwmgr || !hwmgr->pm_en)
+		return 0;
+
+	if (hwmgr->hwmgr_func->powergate_gfx == NULL) {
+		pr_info("%s was not implemented.\n", __func__);
+		return 0;
+	}
+
+	return hwmgr->hwmgr_func->powergate_gfx(hwmgr, gate);
+}
+
 static int pp_set_powergating_by_smu(void *handle,
 				uint32_t block_type, bool gate)
 {
@@ -1201,6 +1209,7 @@ static int pp_set_powergating_by_smu(void *handle,
 		pp_dpm_powergate_mmhub(handle);
 		break;
 	case AMD_IP_BLOCK_TYPE_GFX:
+		ret = pp_dpm_powergate_gfx(handle, gate);
 		break;
 	default:
 		break;