drm/amd/pm: retain the fine grain tuning parameters after resume

This patch is to retain the fine grain tuning parameters after resume for
legacy APU, it will cover Raven/Raven2/Picasso.
Signed-off-by: Xiaojian Du <Xiaojian.Du@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/hardwaremanager.c

@@ -82,7 +82,8 @@ int phm_enable_dynamic_state_management(struct pp_hwmgr *hwmgr)
 
 	/* Skip for suspend/resume case */
 	if (!hwmgr->pp_one_vf && smum_is_dpm_running(hwmgr)
-	    && !amdgpu_passthrough(adev) && adev->in_suspend) {
+	    && !amdgpu_passthrough(adev) && adev->in_suspend
+		&& adev->asic_type != CHIP_RAVEN) {
 		pr_info("dpm has been enabled\n");
 		return 0;
 	}

drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu10_hwmgr.c

@@ -377,6 +377,27 @@ static int smu10_enable_gfx_off(struct pp_hwmgr *hwmgr)
 
 static int smu10_enable_dpm_tasks(struct pp_hwmgr *hwmgr)
 {
+	struct amdgpu_device *adev = hwmgr->adev;
+	struct smu10_hwmgr *smu10_data = (struct smu10_hwmgr *)(hwmgr->backend);
+	int ret = -EINVAL;
+
+	if (adev->in_suspend) {
+		pr_info("restore the fine grain parameters\n");
+
+		ret = smum_send_msg_to_smc_with_parameter(hwmgr,
+					PPSMC_MSG_SetHardMinGfxClk,
+					smu10_data->gfx_actual_soft_min_freq,
+					NULL);
+		if (ret)
+			return ret;
+		ret = smum_send_msg_to_smc_with_parameter(hwmgr,
+					PPSMC_MSG_SetSoftMaxGfxClk,
+					smu10_data->gfx_actual_soft_max_freq,
+					NULL);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }