diff --git a/plat/imx/common/imx8_psci.c b/plat/imx/common/imx8_psci.c
index 588d8b4..91d3370 100644
--- a/plat/imx/common/imx8_psci.c
+++ b/plat/imx/common/imx8_psci.c
@@ -32,8 +32,22 @@
 int imx_validate_power_state(unsigned int power_state,
 			 psci_power_state_t *req_state)
 {
-	/* TODO */
-	return PSCI_E_INVALID_PARAMS;
+	int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
+	int pwr_type = psci_get_pstate_type(power_state);
+	int state_id = psci_get_pstate_id(power_state);
+
+	if (pwr_lvl > PLAT_MAX_PWR_LVL)
+		return PSCI_E_INVALID_PARAMS;
+
+	if (pwr_type == PSTATE_TYPE_POWERDOWN) {
+		req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
+		if (!state_id)
+			req_state->pwr_domain_state[MPIDR_AFFLVL1] = PLAT_MAX_RET_STATE;
+		else
+			req_state->pwr_domain_state[MPIDR_AFFLVL1] = PLAT_MAX_OFF_STATE;
+	}
+
+	return PSCI_E_SUCCESS;
 }
 
 void imx_get_sys_suspend_power_state(psci_power_state_t *req_state)