diff --git a/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c
new file mode 100644
index 0000000..c083318
--- /dev/null
+++ b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2021, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <mtk_sip_svc.h>
+#include <plat_dfd.h>
+
+static bool dfd_enabled;
+static uint64_t dfd_base_addr;
+static uint64_t dfd_chain_length;
+static uint64_t dfd_cache_dump;
+
+static void dfd_setup(uint64_t base_addr, uint64_t chain_length,
+		      uint64_t cache_dump)
+{
+	mmio_write_32(MTK_WDT_LATCH_CTL2, MTK_WDT_LATCH_CTL2_VAL);
+	mmio_write_32(MTK_WDT_INTERVAL, MTK_WDT_INTERVAL_VAL);
+	mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_VAL);
+	mmio_write_32(MTK_DRM_LATCH_CTL1, MTK_DRM_LATCH_CTL1_VAL);
+
+	/* Bit[2] = 0 (default=1), disable dfd apb bus protect_en */
+	mmio_clrbits_32(DFD_O_INTRF_MCU_PWR_CTL_MASK, 0x1 << 2);
+
+	/* Bit[0] : enable?mcusys_vproc?external_off?dfd?trigger -> 1 */
+	mmio_setbits_32(DFD_V50_GROUP_0_63_DIFF, 0x1);
+
+	/* bit[0]: rg_rw_dfd_internal_dump_en -> 1 */
+	/* bit[2]: rg_rw_dfd_clock_stop_en -> 1 */
+	sync_writel(DFD_INTERNAL_CTL, 0x5);
+
+	/* bit[13]: xreset_b_update_disable */
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 13);
+
+	/*
+	 * bit[10:3]: DFD trigger selection mask
+	 * bit[3]: rg_rw_dfd_trigger_sel[0] = 1(enable wdt trigger)
+	 * bit[4]: rg_rw_dfd_trigger_sel[1] = 1(enable HW trigger)
+	 * bit[5]: rg_rw_dfd_trigger_sel[2] = 1(enable SW trigger)
+	 * bit[6]: rg_rw_dfd_trigger_sel[3] = 1(enable SW non-security trigger)
+	 * bit[7]: rg_rw_dfd_trigger_sel[4] = 1(enable timer trigger)
+	 */
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x1F << 3);
+
+	/*
+	 * bit[9]  : rg_rw_dfd_trigger_sel[6] = 1(cpu_eb_sw_dfd_trigger)
+	 * bit[10] : rg_rw_dfd_trigger_sel[7] = 1(cpu_eb_wdt_dfd_trigger)
+	 */
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 9);
+
+	/* bit[20:19]: rg_dfd_armpll_div_mux_sel switch to PLL2 for DFD */
+	mmio_setbits_32(DFD_INTERNAL_CTL, 0x3 << 19);
+
+	/*
+	 * bit[0]: rg_rw_dfd_auto_power_on = 1
+	 * bit[2:1]: rg_rw_dfd_auto_power_on_dely = 1(10us)
+	 * bit[4:2]: rg_rw_dfd_power_on_wait_time = 1(20us)
+	 */
+	mmio_write_32(DFD_INTERNAL_PWR_ON, 0xB);
+
+	/* longest scan chain length */
+	mmio_write_32(DFD_CHAIN_LENGTH0, chain_length);
+
+	/* bit[1:0]: rg_rw_dfd_shift_clock_ratio */
+	mmio_write_32(DFD_INTERNAL_SHIFT_CLK_RATIO, 0x0);
+
+	/* rg_dfd_test_so_over_64 */
+	mmio_write_32(DFD_INTERNAL_TEST_SO_OVER_64, 0x1);
+
+	/* DFD3.0 */
+	mmio_write_32(DFD_TEST_SI_0, 0x0);
+	mmio_write_32(DFD_TEST_SI_1, 0x0);
+	mmio_write_32(DFD_TEST_SI_2, 0x0);
+	mmio_write_32(DFD_TEST_SI_3, 0x0);
+
+	/* for iLDO feature */
+	sync_writel(DFD_POWER_CTL, 0xF9);
+
+	/* read offset */
+	sync_writel(DFD_READ_ADDR, DFD_READ_ADDR_VAL);
+
+	/* for DFD-3.0 setup */
+	sync_writel(DFD_V30_CTL, 0xD);
+
+	/* set base address */
+	mmio_write_32(DFD_O_SET_BASEADDR_REG, base_addr >> 24);
+	mmio_write_32(DFD_O_REG_0, 0);
+
+	/* setup global variables for suspend and resume */
+	dfd_enabled = true;
+	dfd_base_addr = base_addr;
+	dfd_chain_length = chain_length;
+	dfd_cache_dump = cache_dump;
+
+	if ((cache_dump & DFD_CACHE_DUMP_ENABLE) != 0UL) {
+		mmio_write_32(MTK_DRM_LATCH_CTL2, MTK_DRM_LATCH_CTL2_CACHE_VAL);
+		sync_writel(DFD_V35_ENABLE, 0x1);
+		sync_writel(DFD_V35_TAP_NUMBER, 0xB);
+		sync_writel(DFD_V35_TAP_EN, DFD_V35_TAP_EN_VAL);
+		sync_writel(DFD_V35_SEQ0_0, DFD_V35_SEQ0_0_VAL);
+
+		/* Cache dump only mode */
+		sync_writel(DFD_V35_CTL, 0x1);
+		mmio_write_32(DFD_INTERNAL_NUM_OF_TEST_SO_GROUP, 0xF);
+		mmio_write_32(DFD_CHAIN_LENGTH0, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH1, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH2, DFD_CHAIN_LENGTH_VAL);
+		mmio_write_32(DFD_CHAIN_LENGTH3, DFD_CHAIN_LENGTH_VAL);
+
+		if ((cache_dump & DFD_PARITY_ERR_TRIGGER) != 0UL) {
+			sync_writel(DFD_HW_TRIGGER_MASK, 0xC);
+			mmio_setbits_32(DFD_INTERNAL_CTL, 0x1 << 4);
+		}
+	}
+	dsbsy();
+}
+
+void dfd_resume(void)
+{
+	if (dfd_enabled == true) {
+		dfd_setup(dfd_base_addr, dfd_chain_length, dfd_cache_dump);
+	}
+}
+
+uint64_t dfd_smc_dispatcher(uint64_t arg0, uint64_t arg1,
+			    uint64_t arg2, uint64_t arg3)
+{
+	uint64_t ret = 0L;
+
+	switch (arg0) {
+	case PLAT_MTK_DFD_SETUP_MAGIC:
+		INFO("[%s] DFD setup call from kernel\n", __func__);
+		dfd_setup(arg1, arg2, arg3);
+		break;
+	case PLAT_MTK_DFD_READ_MAGIC:
+		/* only allow to access DFD register base + 0x200 */
+		if (arg1 <= 0x200) {
+			ret = mmio_read_32(MISC1_CFG_BASE + arg1);
+		}
+		break;
+	case PLAT_MTK_DFD_WRITE_MAGIC:
+		/* only allow to access DFD register base + 0x200 */
+		if (arg1 <= 0x200) {
+			sync_writel(MISC1_CFG_BASE + arg1, arg2);
+		}
+		break;
+	default:
+		ret = MTK_SIP_E_INVALID_PARAM;
+		break;
+	}
+
+	return ret;
+}
diff --git a/plat/mediatek/mt8195/drivers/dfd/plat_dfd.h b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.h
new file mode 100644
index 0000000..2a7e979
--- /dev/null
+++ b/plat/mediatek/mt8195/drivers/dfd/plat_dfd.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2021, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_DFD_H
+#define PLAT_DFD_H
+
+#include <arch_helpers.h>
+#include <lib/mmio.h>
+#include <platform_def.h>
+
+#define sync_writel(addr, val)	do { mmio_write_32((addr), (val)); \
+				dsbsy(); \
+				} while (0)
+
+#define PLAT_MTK_DFD_SETUP_MAGIC		(0x99716150)
+#define PLAT_MTK_DFD_READ_MAGIC			(0x99716151)
+#define PLAT_MTK_DFD_WRITE_MAGIC		(0x99716152)
+
+#define MTK_DRM_LATCH_CTL1                      (DRM_BASE + 0x40)
+#define MTK_DRM_LATCH_CTL2			(DRM_BASE + 0x44)
+
+#define MTK_WDT_BASE				(RGU_BASE)
+#define MTK_WDT_INTERVAL			(MTK_WDT_BASE + 0x10)
+#define MTK_WDT_LATCH_CTL2			(MTK_WDT_BASE + 0x48)
+
+#define MCU_BIU_BASE				(MCUCFG_BASE)
+#define MISC1_CFG_BASE				(MCU_BIU_BASE + 0xE040)
+#define DFD_INTERNAL_CTL			(MISC1_CFG_BASE + 0x00)
+#define DFD_INTERNAL_PWR_ON			(MISC1_CFG_BASE + 0x08)
+#define DFD_CHAIN_LENGTH0			(MISC1_CFG_BASE + 0x0C)
+#define DFD_INTERNAL_SHIFT_CLK_RATIO		(MISC1_CFG_BASE + 0x10)
+#define DFD_CHAIN_LENGTH1			(MISC1_CFG_BASE + 0x1C)
+#define DFD_CHAIN_LENGTH2			(MISC1_CFG_BASE + 0x20)
+#define DFD_CHAIN_LENGTH3			(MISC1_CFG_BASE + 0x24)
+#define DFD_INTERNAL_TEST_SO_0			(MISC1_CFG_BASE + 0x28)
+#define DFD_INTERNAL_NUM_OF_TEST_SO_GROUP	(MISC1_CFG_BASE + 0x30)
+#define DFD_INTERNAL_TEST_SO_OVER_64		(MISC1_CFG_BASE + 0x34)
+#define DFD_INTERNAL_SW_NS_TRIGGER		(MISC1_CFG_BASE + 0x3c)
+#define DFD_V30_CTL				(MISC1_CFG_BASE + 0x48)
+#define DFD_V30_BASE_ADDR			(MISC1_CFG_BASE + 0x4C)
+#define DFD_POWER_CTL				(MISC1_CFG_BASE + 0x50)
+#define DFD_TEST_SI_0				(MISC1_CFG_BASE + 0x58)
+#define DFD_TEST_SI_1				(MISC1_CFG_BASE + 0x5C)
+#define DFD_CLEAN_STATUS			(MISC1_CFG_BASE + 0x60)
+#define DFD_TEST_SI_2				(MISC1_CFG_BASE + 0x1D8)
+#define DFD_TEST_SI_3				(MISC1_CFG_BASE + 0x1DC)
+#define DFD_READ_ADDR				(MISC1_CFG_BASE + 0x1E8)
+#define DFD_HW_TRIGGER_MASK			(MISC1_CFG_BASE + 0xBC)
+
+#define DFD_V35_ENABLE				(MCU_BIU_BASE + 0xE0A8)
+#define DFD_V35_TAP_NUMBER			(MCU_BIU_BASE + 0xE0AC)
+#define DFD_V35_TAP_EN				(MCU_BIU_BASE + 0xE0B0)
+#define DFD_V35_CTL				(MCU_BIU_BASE + 0xE0B4)
+#define DFD_V35_SEQ0_0				(MCU_BIU_BASE + 0xE0C0)
+#define DFD_V35_SEQ0_1				(MCU_BIU_BASE + 0xE0C4)
+#define DFD_V50_GROUP_0_63_DIFF			(MCU_BIU_BASE + 0xE2AC)
+
+#define DFD_O_PROTECT_EN_REG			(0x10001220)
+#define DFD_O_INTRF_MCU_PWR_CTL_MASK		(0x10001A3C)
+#define DFD_O_SET_BASEADDR_REG			(0x10043000)
+#define DFD_O_REG_0				(0x10001390)
+
+#define DFD_CACHE_DUMP_ENABLE			1U
+#define DFD_PARITY_ERR_TRIGGER			2U
+
+#define	DFD_V35_TAP_EN_VAL			(0x43FF)
+#define	DFD_V35_SEQ0_0_VAL			(0x63668820)
+#define DFD_READ_ADDR_VAL			(0x40000008)
+#define DFD_CHAIN_LENGTH_VAL			(0xFFFFFFFF)
+
+#define MTK_WDT_LATCH_CTL2_VAL			(0x9507FFFF)
+#define MTK_WDT_INTERVAL_VAL			(0x6600000A)
+#define MTK_DRM_LATCH_CTL2_VAL			(0x950600C8)
+#define MTK_DRM_LATCH_CTL2_CACHE_VAL		(0x95065DC0)
+
+#define MTK_DRM_LATCH_CTL1_VAL			(0x95000013)
+
+void dfd_resume(void);
+uint64_t dfd_smc_dispatcher(uint64_t arg0, uint64_t arg1,
+			    uint64_t arg2, uint64_t arg3);
+
+#endif /* PLAT_DFD_H */
diff --git a/plat/mediatek/mt8195/include/plat_sip_calls.h b/plat/mediatek/mt8195/include/plat_sip_calls.h
index 181aec0..ce25c6f 100644
--- a/plat/mediatek/mt8195/include/plat_sip_calls.h
+++ b/plat/mediatek/mt8195/include/plat_sip_calls.h
@@ -10,7 +10,11 @@
 /*******************************************************************************
  * Plat SiP function constants
  ******************************************************************************/
-#define MTK_PLAT_SIP_NUM_CALLS    2
+#define MTK_PLAT_SIP_NUM_CALLS    4
+
+/* DFD */
+#define MTK_SIP_KERNEL_DFD_AARCH32	0x82000205
+#define MTK_SIP_KERNEL_DFD_AARCH64	0xC2000205
 
 /* DP/eDP */
 #define MTK_SIP_DP_CONTROL_AARCH32	0x82000523
diff --git a/plat/mediatek/mt8195/include/platform_def.h b/plat/mediatek/mt8195/include/platform_def.h
index 44de8eb..68301d6 100644
--- a/plat/mediatek/mt8195/include/platform_def.h
+++ b/plat/mediatek/mt8195/include/platform_def.h
@@ -24,7 +24,9 @@
 #define TOPCKGEN_BASE           (IO_PHYS + 0x00000000)
 #define INFRACFG_AO_BASE        (IO_PHYS + 0x00001000)
 #define SPM_BASE		(IO_PHYS + 0x00006000)
+#define RGU_BASE		(IO_PHYS + 0x00007000)
 #define APMIXEDSYS              (IO_PHYS + 0x0000C000)
+#define DRM_BASE		(IO_PHYS + 0x0000D000)
 #define SSPM_MBOX_BASE          (IO_PHYS + 0x00480000)
 #define PERICFG_AO_BASE         (IO_PHYS + 0x01003000)
 #define VPPSYS0_BASE            (IO_PHYS + 0x04000000)
diff --git a/plat/mediatek/mt8195/plat_pm.c b/plat/mediatek/mt8195/plat_pm.c
index 2beeb02..b77ab27 100644
--- a/plat/mediatek/mt8195/plat_pm.c
+++ b/plat/mediatek/mt8195/plat_pm.c
@@ -17,6 +17,7 @@
 #include <mtk_ptp3_common.h>
 #include <mtspmc.h>
 #include <plat/common/platform.h>
+#include <plat_dfd.h>
 #include <plat_mtk_lpm.h>
 #include <plat_params.h>
 #include <plat_pm.h>
@@ -166,6 +167,8 @@
 	mt_gic_distif_restore();
 	gic_sgi_restore_all();
 
+	dfd_resume();
+
 	plat_mt_pm_invoke_no_check(pwr_mcusys_on_finished, cpu, state);
 }
 
diff --git a/plat/mediatek/mt8195/plat_sip_calls.c b/plat/mediatek/mt8195/plat_sip_calls.c
index ee36898..ddc7502 100644
--- a/plat/mediatek/mt8195/plat_sip_calls.c
+++ b/plat/mediatek/mt8195/plat_sip_calls.c
@@ -10,6 +10,7 @@
 #include <mt_spm.h>
 #include <mt_spm_vcorefs.h>
 #include <mtk_sip_svc.h>
+#include <plat_dfd.h>
 #include "plat_sip_calls.h"
 
 uintptr_t mediatek_plat_sip_handler(uint32_t smc_fid,
@@ -35,6 +36,11 @@
 		ret = spm_vcorefs_v2_args(x1, x2, x3, &x4);
 		SMC_RET2(handle, ret, x4);
 		break;
+	case MTK_SIP_KERNEL_DFD_AARCH32:
+	case MTK_SIP_KERNEL_DFD_AARCH64:
+		ret = dfd_smc_dispatcher(x1, x2, x3, x4);
+		SMC_RET1(handle, ret);
+		break;
 	default:
 		ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid);
 		break;
diff --git a/plat/mediatek/mt8195/platform.mk b/plat/mediatek/mt8195/platform.mk
index 48a2f72..ef7ff81 100644
--- a/plat/mediatek/mt8195/platform.mk
+++ b/plat/mediatek/mt8195/platform.mk
@@ -15,6 +15,7 @@
                  -I${MTK_PLAT}/common/drivers/uart/               \
                  -I${MTK_PLAT}/common/lpm/                        \
                  -I${MTK_PLAT_SOC}/drivers/dcm                    \
+                 -I${MTK_PLAT_SOC}/drivers/dfd                    \
                  -I${MTK_PLAT_SOC}/drivers/dp/                    \
                  -I${MTK_PLAT_SOC}/drivers/emi_mpu/               \
                  -I${MTK_PLAT_SOC}/drivers/gpio/                  \
@@ -60,6 +61,7 @@
                 ${MTK_PLAT_SOC}/bl31_plat_setup.c                     \
                 ${MTK_PLAT_SOC}/drivers/dcm/mtk_dcm.c                 \
                 ${MTK_PLAT_SOC}/drivers/dcm/mtk_dcm_utils.c           \
+                ${MTK_PLAT_SOC}/drivers/dfd/plat_dfd.c                \
                 ${MTK_PLAT_SOC}/drivers/dp/mt_dp.c                    \
                 ${MTK_PLAT_SOC}/drivers/emi_mpu/emi_mpu.c             \
                 ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c                 \