Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1193 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
new file mode 100644
index 000000000..d3cc5ec46
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -0,0 +1,1193 @@
+/*
+ * Copyright 2012-16 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "core_types.h"
+#include "link_encoder.h"
+#include "dce_dmcu.h"
+#include "dm_services.h"
+#include "reg_helper.h"
+#include "fixed31_32.h"
+#include "dc.h"
+
+#define TO_DCE_DMCU(dmcu)\
+	container_of(dmcu, struct dce_dmcu, base)
+
+#define REG(reg) \
+	(dmcu_dce->regs->reg)
+
+#undef FN
+#define FN(reg_name, field_name) \
+	dmcu_dce->dmcu_shift->field_name, dmcu_dce->dmcu_mask->field_name
+
+#define CTX \
+	dmcu_dce->base.ctx
+
+/* PSR related commands */
+#define PSR_ENABLE 0x20
+#define PSR_EXIT 0x21
+#define PSR_SET 0x23
+#define PSR_SET_WAITLOOP 0x31
+#define MCP_INIT_DMCU 0x88
+#define MCP_INIT_IRAM 0x89
+#define MCP_SYNC_PHY_LOCK 0x90
+#define MCP_SYNC_PHY_UNLOCK 0x91
+#define MCP_BL_SET_PWM_FRAC 0x6A  /* Enable or disable Fractional PWM */
+#define CRC_WIN_NOTIFY 0x92
+#define CRC_STOP_UPDATE 0x93
+#define MCP_SEND_EDID_CEA 0xA0
+#define EDID_CEA_CMD_ACK 1
+#define EDID_CEA_CMD_NACK 2
+#define MASTER_COMM_CNTL_REG__MASTER_COMM_INTERRUPT_MASK   0x00000001L
+
+// PSP FW version
+#define mmMP0_SMN_C2PMSG_58				0x1607A
+
+//Register access policy version
+#define mmMP0_SMN_C2PMSG_91				0x1609B
+
+static const uint32_t abm_gain_stepsize = 0x0060;
+
+static bool dce_dmcu_init(struct dmcu *dmcu)
+{
+	// Do nothing
+	return true;
+}
+
+static bool dce_dmcu_load_iram(struct dmcu *dmcu,
+		unsigned int start_offset,
+		const char *src,
+		unsigned int bytes)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int count = 0;
+
+	/* Enable write access to IRAM */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 1,
+			IRAM_WR_ADDR_AUTO_INC, 1);
+
+	REG_WAIT(DCI_MEM_PWR_STATUS, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10);
+
+	REG_WRITE(DMCU_IRAM_WR_CTRL, start_offset);
+
+	for (count = 0; count < bytes; count++)
+		REG_WRITE(DMCU_IRAM_WR_DATA, src[count]);
+
+	/* Disable write access to IRAM to allow dynamic sleep state */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 0,
+			IRAM_WR_ADDR_AUTO_INC, 0);
+
+	return true;
+}
+
+static void dce_get_dmcu_psr_state(struct dmcu *dmcu, enum dc_psr_state *state)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	uint32_t psr_state_offset = 0xf0;
+
+	/* Enable write access to IRAM */
+	REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 1);
+
+	REG_WAIT(DCI_MEM_PWR_STATUS, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10);
+
+	/* Write address to IRAM_RD_ADDR in DMCU_IRAM_RD_CTRL */
+	REG_WRITE(DMCU_IRAM_RD_CTRL, psr_state_offset);
+
+	/* Read data from IRAM_RD_DATA in DMCU_IRAM_RD_DATA*/
+	*state = (enum dc_psr_state)REG_READ(DMCU_IRAM_RD_DATA);
+
+	/* Disable write access to IRAM after finished using IRAM
+	 * in order to allow dynamic sleep state
+	 */
+	REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 0);
+}
+
+static void dce_dmcu_set_psr_enable(struct dmcu *dmcu, bool enable, bool wait)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+
+	unsigned int retryCount;
+	enum dc_psr_state state = PSR_STATE0;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	/* setDMCUParam_Cmd */
+	if (enable)
+		REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				PSR_ENABLE);
+	else
+		REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				PSR_EXIT);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+	if (wait == true) {
+		for (retryCount = 0; retryCount <= 100; retryCount++) {
+			dce_get_dmcu_psr_state(dmcu, &state);
+			if (enable) {
+				if (state != PSR_STATE0)
+					break;
+			} else {
+				if (state == PSR_STATE0)
+					break;
+			}
+			udelay(10);
+		}
+	}
+}
+
+static bool dce_dmcu_setup_psr(struct dmcu *dmcu,
+		struct dc_link *link,
+		struct psr_context *psr_context)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+
+	union dce_dmcu_psr_config_data_reg1 masterCmdData1;
+	union dce_dmcu_psr_config_data_reg2 masterCmdData2;
+	union dce_dmcu_psr_config_data_reg3 masterCmdData3;
+
+	link->link_enc->funcs->psr_program_dp_dphy_fast_training(link->link_enc,
+			psr_context->psrExitLinkTrainingRequired);
+
+	/* Enable static screen interrupts for PSR supported display */
+	/* Disable the interrupt coming from other displays. */
+	REG_UPDATE_4(DMCU_INTERRUPT_TO_UC_EN_MASK,
+			STATIC_SCREEN1_INT_TO_UC_EN, 0,
+			STATIC_SCREEN2_INT_TO_UC_EN, 0,
+			STATIC_SCREEN3_INT_TO_UC_EN, 0,
+			STATIC_SCREEN4_INT_TO_UC_EN, 0);
+
+	switch (psr_context->controllerId) {
+	/* Driver uses case 1 for unconfigured */
+	case 1:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN1_INT_TO_UC_EN, 1);
+		break;
+	case 2:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN2_INT_TO_UC_EN, 1);
+		break;
+	case 3:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN3_INT_TO_UC_EN, 1);
+		break;
+	case 4:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN4_INT_TO_UC_EN, 1);
+		break;
+	case 5:
+		/* CZ/NL only has 4 CRTC!!
+		 * really valid.
+		 * There is no interrupt enable mask for these instances.
+		 */
+		break;
+	case 6:
+		/* CZ/NL only has 4 CRTC!!
+		 * These are here because they are defined in HW regspec,
+		 * but not really valid. There is no interrupt enable mask
+		 * for these instances.
+		 */
+		break;
+	default:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN1_INT_TO_UC_EN, 1);
+		break;
+	}
+
+	link->link_enc->funcs->psr_program_secondary_packet(link->link_enc,
+			psr_context->sdpTransmitLineNumDeadline);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+					dmcu_wait_reg_ready_interval,
+					dmcu_max_retry_on_wait_reg_ready);
+
+	/* setDMCUParam_PSRHostConfigData */
+	masterCmdData1.u32All = 0;
+	masterCmdData1.bits.timehyst_frames = psr_context->timehyst_frames;
+	masterCmdData1.bits.hyst_lines = psr_context->hyst_lines;
+	masterCmdData1.bits.rfb_update_auto_en =
+			psr_context->rfb_update_auto_en;
+	masterCmdData1.bits.dp_port_num = psr_context->transmitterId;
+	masterCmdData1.bits.dcp_sel = psr_context->controllerId;
+	masterCmdData1.bits.phy_type  = psr_context->phyType;
+	masterCmdData1.bits.frame_cap_ind =
+			psr_context->psrFrameCaptureIndicationReq;
+	masterCmdData1.bits.aux_chan = psr_context->channel;
+	masterCmdData1.bits.aux_repeat = psr_context->aux_repeats;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					masterCmdData1.u32All);
+
+	masterCmdData2.u32All = 0;
+	masterCmdData2.bits.dig_fe = psr_context->engineId;
+	masterCmdData2.bits.dig_be = psr_context->transmitterId;
+	masterCmdData2.bits.skip_wait_for_pll_lock =
+			psr_context->skipPsrWaitForPllLock;
+	masterCmdData2.bits.frame_delay = psr_context->frame_delay;
+	masterCmdData2.bits.smu_phy_id = psr_context->smuPhyId;
+	masterCmdData2.bits.num_of_controllers =
+			psr_context->numberOfControllers;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG2),
+			masterCmdData2.u32All);
+
+	masterCmdData3.u32All = 0;
+	masterCmdData3.bits.psr_level = psr_context->psr_level.u32all;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG3),
+			masterCmdData3.u32All);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG,
+			MASTER_COMM_CMD_REG_BYTE0, PSR_SET);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	return true;
+}
+
+static bool dce_is_dmcu_initialized(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_uc_reset;
+
+	/* microcontroller is not running */
+	REG_GET(DMCU_STATUS, UC_IN_RESET, &dmcu_uc_reset);
+
+	/* DMCU is not running */
+	if (dmcu_uc_reset)
+		return false;
+
+	return true;
+}
+
+static void dce_psr_wait_loop(
+	struct dmcu *dmcu,
+	unsigned int wait_loop_number)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	union dce_dmcu_psr_config_data_wait_loop_reg1 masterCmdData1;
+
+	if (dmcu->cached_wait_loop_number == wait_loop_number)
+		return;
+
+	/* DMCU is not running */
+	if (!dce_is_dmcu_initialized(dmcu))
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	masterCmdData1.u32 = 0;
+	masterCmdData1.bits.wait_loop = wait_loop_number;
+	dmcu->cached_wait_loop_number = wait_loop_number;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1), masterCmdData1.u32);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, PSR_SET_WAITLOOP);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+}
+
+static void dce_get_psr_wait_loop(
+		struct dmcu *dmcu, unsigned int *psr_wait_loop_number)
+{
+	*psr_wait_loop_number = dmcu->cached_wait_loop_number;
+	return;
+}
+
+static void dcn10_get_dmcu_version(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	uint32_t dmcu_version_offset = 0xf1;
+
+	/* Enable write access to IRAM */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 1,
+			IRAM_RD_ADDR_AUTO_INC, 1);
+
+	REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10);
+
+	/* Write address to IRAM_RD_ADDR and read from DATA register */
+	REG_WRITE(DMCU_IRAM_RD_CTRL, dmcu_version_offset);
+	dmcu->dmcu_version.interface_version = REG_READ(DMCU_IRAM_RD_DATA);
+	dmcu->dmcu_version.abm_version = REG_READ(DMCU_IRAM_RD_DATA);
+	dmcu->dmcu_version.psr_version = REG_READ(DMCU_IRAM_RD_DATA);
+	dmcu->dmcu_version.build_version = ((REG_READ(DMCU_IRAM_RD_DATA) << 8) |
+						REG_READ(DMCU_IRAM_RD_DATA));
+
+	/* Disable write access to IRAM to allow dynamic sleep state */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 0,
+			IRAM_RD_ADDR_AUTO_INC, 0);
+}
+
+static void dcn10_dmcu_enable_fractional_pwm(struct dmcu *dmcu,
+		uint32_t fractional_pwm)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	/* Wait until microcontroller is ready to process interrupt */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+	/* Set PWM fractional enable/disable */
+	REG_WRITE(MASTER_COMM_DATA_REG1, fractional_pwm);
+
+	/* Set command to enable or disable fractional PWM microcontroller */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+			MCP_BL_SET_PWM_FRAC);
+
+	/* Notify microcontroller of new command */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* Ensure command has been executed before continuing */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+}
+
+static bool dcn10_dmcu_init(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	const struct dc_config *config = &dmcu->ctx->dc->config;
+	bool status = false;
+	struct dc_context *ctx = dmcu->ctx;
+	unsigned int i;
+	//  5 4 3 2 1 0
+	//  F E D C B A - bit 0 is A, bit 5 is F
+	unsigned int tx_interrupt_mask = 0;
+
+	PERF_TRACE();
+	/*  Definition of DC_DMCU_SCRATCH
+	 *  0 : firmare not loaded
+	 *  1 : PSP load DMCU FW but not initialized
+	 *  2 : Firmware already initialized
+	 */
+	dmcu->dmcu_state = REG_READ(DC_DMCU_SCRATCH);
+
+	for (i = 0; i < ctx->dc->link_count; i++) {
+		if (ctx->dc->links[i]->link_enc->features.flags.bits.DP_IS_USB_C) {
+			if (ctx->dc->links[i]->link_enc->transmitter >= TRANSMITTER_UNIPHY_A &&
+					ctx->dc->links[i]->link_enc->transmitter <= TRANSMITTER_UNIPHY_F) {
+				tx_interrupt_mask |= 1 << ctx->dc->links[i]->link_enc->transmitter;
+			}
+		}
+	}
+
+	switch (dmcu->dmcu_state) {
+	case DMCU_UNLOADED:
+		status = false;
+		break;
+	case DMCU_LOADED_UNINITIALIZED:
+		/* Wait until microcontroller is ready to process interrupt */
+		REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+		/* Set initialized ramping boundary value */
+		REG_WRITE(MASTER_COMM_DATA_REG1, 0xFFFF);
+
+		/* Set backlight ramping stepsize */
+		REG_WRITE(MASTER_COMM_DATA_REG2, abm_gain_stepsize);
+
+		REG_WRITE(MASTER_COMM_DATA_REG3, tx_interrupt_mask);
+
+		/* Set command to initialize microcontroller */
+		REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+			MCP_INIT_DMCU);
+
+		/* Notify microcontroller of new command */
+		REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+		/* Ensure command has been executed before continuing */
+		REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+		// Check state is initialized
+		dmcu->dmcu_state = REG_READ(DC_DMCU_SCRATCH);
+
+		// If microcontroller is not in running state, fail
+		if (dmcu->dmcu_state == DMCU_RUNNING) {
+			/* Retrieve and cache the DMCU firmware version. */
+			dcn10_get_dmcu_version(dmcu);
+
+			/* Initialize DMCU to use fractional PWM or not */
+			dcn10_dmcu_enable_fractional_pwm(dmcu,
+				(config->disable_fractional_pwm == false) ? 1 : 0);
+			status = true;
+		} else {
+			status = false;
+		}
+
+		break;
+	case DMCU_RUNNING:
+		status = true;
+		break;
+	default:
+		status = false;
+		break;
+	}
+
+	PERF_TRACE();
+	return status;
+}
+
+static bool dcn21_dmcu_init(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	uint32_t dmcub_psp_version = REG_READ(DMCUB_SCRATCH15);
+
+	if (dmcu->auto_load_dmcu && dmcub_psp_version == 0) {
+		return false;
+	}
+
+	return dcn10_dmcu_init(dmcu);
+}
+
+static bool dcn10_dmcu_load_iram(struct dmcu *dmcu,
+		unsigned int start_offset,
+		const char *src,
+		unsigned int bytes)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int count = 0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	/* Enable write access to IRAM */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 1,
+			IRAM_WR_ADDR_AUTO_INC, 1);
+
+	REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10);
+
+	REG_WRITE(DMCU_IRAM_WR_CTRL, start_offset);
+
+	for (count = 0; count < bytes; count++)
+		REG_WRITE(DMCU_IRAM_WR_DATA, src[count]);
+
+	/* Disable write access to IRAM to allow dynamic sleep state */
+	REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL,
+			IRAM_HOST_ACCESS_EN, 0,
+			IRAM_WR_ADDR_AUTO_INC, 0);
+
+	/* Wait until microcontroller is ready to process interrupt */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+	/* Set command to signal IRAM is loaded and to initialize IRAM */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+			MCP_INIT_IRAM);
+
+	/* Notify microcontroller of new command */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* Ensure command has been executed before continuing */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+	return true;
+}
+
+static void dcn10_get_dmcu_psr_state(struct dmcu *dmcu, enum dc_psr_state *state)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	uint32_t psr_state_offset = 0xf0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	/* Enable write access to IRAM */
+	REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 1);
+
+	REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10);
+
+	/* Write address to IRAM_RD_ADDR in DMCU_IRAM_RD_CTRL */
+	REG_WRITE(DMCU_IRAM_RD_CTRL, psr_state_offset);
+
+	/* Read data from IRAM_RD_DATA in DMCU_IRAM_RD_DATA*/
+	*state = (enum dc_psr_state)REG_READ(DMCU_IRAM_RD_DATA);
+
+	/* Disable write access to IRAM after finished using IRAM
+	 * in order to allow dynamic sleep state
+	 */
+	REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 0);
+}
+
+static void dcn10_dmcu_set_psr_enable(struct dmcu *dmcu, bool enable, bool wait)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+
+	unsigned int retryCount;
+	enum dc_psr_state state = PSR_STATE0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	/* setDMCUParam_Cmd */
+	if (enable)
+		REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				PSR_ENABLE);
+	else
+		REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				PSR_EXIT);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* Below loops 1000 x 500us = 500 ms.
+	 *  Exit PSR may need to wait 1-2 frames to power up. Timeout after at
+	 *  least a few frames. Should never hit the max retry assert below.
+	 */
+	if (wait == true) {
+		for (retryCount = 0; retryCount <= 1000; retryCount++) {
+			dcn10_get_dmcu_psr_state(dmcu, &state);
+			if (enable) {
+				if (state != PSR_STATE0)
+					break;
+			} else {
+				if (state == PSR_STATE0)
+					break;
+			}
+			udelay(500);
+		}
+
+		/* assert if max retry hit */
+		if (retryCount >= 1000)
+			ASSERT(0);
+	}
+}
+
+static bool dcn10_dmcu_setup_psr(struct dmcu *dmcu,
+		struct dc_link *link,
+		struct psr_context *psr_context)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+
+	union dce_dmcu_psr_config_data_reg1 masterCmdData1;
+	union dce_dmcu_psr_config_data_reg2 masterCmdData2;
+	union dce_dmcu_psr_config_data_reg3 masterCmdData3;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	link->link_enc->funcs->psr_program_dp_dphy_fast_training(link->link_enc,
+			psr_context->psrExitLinkTrainingRequired);
+
+	/* Enable static screen interrupts for PSR supported display */
+	/* Disable the interrupt coming from other displays. */
+	REG_UPDATE_4(DMCU_INTERRUPT_TO_UC_EN_MASK,
+			STATIC_SCREEN1_INT_TO_UC_EN, 0,
+			STATIC_SCREEN2_INT_TO_UC_EN, 0,
+			STATIC_SCREEN3_INT_TO_UC_EN, 0,
+			STATIC_SCREEN4_INT_TO_UC_EN, 0);
+
+	switch (psr_context->controllerId) {
+	/* Driver uses case 1 for unconfigured */
+	case 1:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN1_INT_TO_UC_EN, 1);
+		break;
+	case 2:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN2_INT_TO_UC_EN, 1);
+		break;
+	case 3:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN3_INT_TO_UC_EN, 1);
+		break;
+	case 4:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN4_INT_TO_UC_EN, 1);
+		break;
+	case 5:
+		/* CZ/NL only has 4 CRTC!!
+		 * really valid.
+		 * There is no interrupt enable mask for these instances.
+		 */
+		break;
+	case 6:
+		/* CZ/NL only has 4 CRTC!!
+		 * These are here because they are defined in HW regspec,
+		 * but not really valid. There is no interrupt enable mask
+		 * for these instances.
+		 */
+		break;
+	default:
+		REG_UPDATE(DMCU_INTERRUPT_TO_UC_EN_MASK,
+				STATIC_SCREEN1_INT_TO_UC_EN, 1);
+		break;
+	}
+
+	link->link_enc->funcs->psr_program_secondary_packet(link->link_enc,
+			psr_context->sdpTransmitLineNumDeadline);
+
+	if (psr_context->allow_smu_optimizations)
+		REG_UPDATE(SMU_INTERRUPT_CONTROL, DC_SMU_INT_ENABLE, 1);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+			dmcu_wait_reg_ready_interval,
+			dmcu_max_retry_on_wait_reg_ready);
+
+	/* setDMCUParam_PSRHostConfigData */
+	masterCmdData1.u32All = 0;
+	masterCmdData1.bits.timehyst_frames = psr_context->timehyst_frames;
+	masterCmdData1.bits.hyst_lines = psr_context->hyst_lines;
+	masterCmdData1.bits.rfb_update_auto_en =
+			psr_context->rfb_update_auto_en;
+	masterCmdData1.bits.dp_port_num = psr_context->transmitterId;
+	masterCmdData1.bits.dcp_sel = psr_context->controllerId;
+	masterCmdData1.bits.phy_type  = psr_context->phyType;
+	masterCmdData1.bits.frame_cap_ind =
+			psr_context->psrFrameCaptureIndicationReq;
+	masterCmdData1.bits.aux_chan = psr_context->channel;
+	masterCmdData1.bits.aux_repeat = psr_context->aux_repeats;
+	masterCmdData1.bits.allow_smu_optimizations = psr_context->allow_smu_optimizations;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					masterCmdData1.u32All);
+
+	masterCmdData2.u32All = 0;
+	masterCmdData2.bits.dig_fe = psr_context->engineId;
+	masterCmdData2.bits.dig_be = psr_context->transmitterId;
+	masterCmdData2.bits.skip_wait_for_pll_lock =
+			psr_context->skipPsrWaitForPllLock;
+	masterCmdData2.bits.frame_delay = psr_context->frame_delay;
+	masterCmdData2.bits.smu_phy_id = psr_context->smuPhyId;
+	masterCmdData2.bits.num_of_controllers =
+			psr_context->numberOfControllers;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG2),
+			masterCmdData2.u32All);
+
+	masterCmdData3.u32All = 0;
+	masterCmdData3.bits.psr_level = psr_context->psr_level.u32all;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG3),
+			masterCmdData3.u32All);
+
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG,
+			MASTER_COMM_CMD_REG_BYTE0, PSR_SET);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	return true;
+}
+
+static void dcn10_psr_wait_loop(
+	struct dmcu *dmcu,
+	unsigned int wait_loop_number)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	union dce_dmcu_psr_config_data_wait_loop_reg1 masterCmdData1;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	if (wait_loop_number != 0) {
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	masterCmdData1.u32 = 0;
+	masterCmdData1.bits.wait_loop = wait_loop_number;
+	dmcu->cached_wait_loop_number = wait_loop_number;
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1), masterCmdData1.u32);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, PSR_SET_WAITLOOP);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+	}
+}
+
+static void dcn10_get_psr_wait_loop(
+		struct dmcu *dmcu, unsigned int *psr_wait_loop_number)
+{
+	*psr_wait_loop_number = dmcu->cached_wait_loop_number;
+	return;
+}
+
+static bool dcn10_is_dmcu_initialized(struct dmcu *dmcu)
+{
+	/* microcontroller is not running */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+	return true;
+}
+
+
+
+static bool dcn20_lock_phy(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, MCP_SYNC_PHY_LOCK);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	return true;
+}
+
+static bool dcn20_unlock_phy(struct dmcu *dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, MCP_SYNC_PHY_UNLOCK);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	return true;
+}
+
+static bool dcn10_send_edid_cea(struct dmcu *dmcu,
+		int offset,
+		int total_length,
+		uint8_t *data,
+		int length)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	uint32_t header, data1, data2;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	if (length > 8 || length <= 0)
+		return false;
+
+	header = ((uint32_t)offset & 0xFFFF) << 16 | (total_length & 0xFFFF);
+	data1 = (((uint32_t)data[0]) << 24) | (((uint32_t)data[1]) << 16) |
+		(((uint32_t)data[2]) << 8) | ((uint32_t)data[3]);
+	data2 = (((uint32_t)data[4]) << 24) | (((uint32_t)data[5]) << 16) |
+		(((uint32_t)data[6]) << 8) | ((uint32_t)data[7]);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, MCP_SEND_EDID_CEA);
+
+	REG_WRITE(MASTER_COMM_DATA_REG1, header);
+	REG_WRITE(MASTER_COMM_DATA_REG2, data1);
+	REG_WRITE(MASTER_COMM_DATA_REG3, data2);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000);
+
+	return true;
+}
+
+static bool dcn10_get_scp_results(struct dmcu *dmcu,
+		uint32_t *cmd,
+		uint32_t *data1,
+		uint32_t *data2,
+		uint32_t *data3)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return false;
+
+	*cmd = REG_READ(SLAVE_COMM_CMD_REG);
+	*data1 =  REG_READ(SLAVE_COMM_DATA_REG1);
+	*data2 =  REG_READ(SLAVE_COMM_DATA_REG2);
+	*data3 =  REG_READ(SLAVE_COMM_DATA_REG3);
+
+	/* clear SCP interrupt */
+	REG_UPDATE(SLAVE_COMM_CNTL_REG, SLAVE_COMM_INTERRUPT, 0);
+
+	return true;
+}
+
+static bool dcn10_recv_amd_vsdb(struct dmcu *dmcu,
+		int *version,
+		int *min_frame_rate,
+		int *max_frame_rate)
+{
+	uint32_t data[4];
+	int cmd, ack, len;
+
+	if (!dcn10_get_scp_results(dmcu, &data[0], &data[1], &data[2], &data[3]))
+		return false;
+
+	cmd = data[0] & 0x3FF;
+	len = (data[0] >> 10) & 0x3F;
+	ack = data[1];
+
+	if (cmd != MCP_SEND_EDID_CEA || ack != EDID_CEA_CMD_ACK || len != 12)
+		return false;
+
+	if ((data[2] & 0xFF)) {
+		*version = (data[2] >> 8) & 0xFF;
+		*min_frame_rate = (data[3] >> 16) & 0xFFFF;
+		*max_frame_rate = data[3] & 0xFFFF;
+		return true;
+	}
+
+	return false;
+}
+
+static bool dcn10_recv_edid_cea_ack(struct dmcu *dmcu, int *offset)
+{
+	uint32_t data[4];
+	int cmd, ack;
+
+	if (!dcn10_get_scp_results(dmcu,
+				&data[0], &data[1], &data[2], &data[3]))
+		return false;
+
+	cmd = data[0] & 0x3FF;
+	ack = data[1];
+
+	if (cmd != MCP_SEND_EDID_CEA)
+		return false;
+
+	if (ack == EDID_CEA_CMD_ACK)
+		return true;
+
+	*offset = data[2]; /* nack */
+	return false;
+}
+
+
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+static void dcn10_forward_crc_window(struct dmcu *dmcu,
+					struct rect *rect,
+					struct otg_phy_mux *mux_mapping)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+	unsigned int crc_start = 0, crc_end = 0, otg_phy_mux = 0;
+	int x_start, y_start, x_end, y_end;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	if (!rect)
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	x_start = rect->x;
+	y_start = rect->y;
+	x_end = x_start + rect->width;
+	y_end = y_start + rect->height;
+
+	/* build up nitification data */
+	crc_start = (((unsigned int) x_start) << 16) | y_start;
+	crc_end = (((unsigned int) x_end) << 16) | y_end;
+	otg_phy_mux =
+		(((unsigned int) mux_mapping->otg_output_num) << 16) | mux_mapping->phy_output_num;
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					crc_start);
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG2),
+			crc_end);
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG3),
+			otg_phy_mux);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				CRC_WIN_NOTIFY);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+}
+
+static void dcn10_stop_crc_win_update(struct dmcu *dmcu,
+					struct otg_phy_mux *mux_mapping)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+	unsigned int otg_phy_mux = 0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	/* build up nitification data */
+	otg_phy_mux =
+		(((unsigned int) mux_mapping->otg_output_num) << 16) | mux_mapping->phy_output_num;
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					otg_phy_mux);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				CRC_STOP_UPDATE);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+}
+#endif
+
+static const struct dmcu_funcs dce_funcs = {
+	.dmcu_init = dce_dmcu_init,
+	.load_iram = dce_dmcu_load_iram,
+	.set_psr_enable = dce_dmcu_set_psr_enable,
+	.setup_psr = dce_dmcu_setup_psr,
+	.get_psr_state = dce_get_dmcu_psr_state,
+	.set_psr_wait_loop = dce_psr_wait_loop,
+	.get_psr_wait_loop = dce_get_psr_wait_loop,
+	.is_dmcu_initialized = dce_is_dmcu_initialized
+};
+
+static const struct dmcu_funcs dcn10_funcs = {
+	.dmcu_init = dcn10_dmcu_init,
+	.load_iram = dcn10_dmcu_load_iram,
+	.set_psr_enable = dcn10_dmcu_set_psr_enable,
+	.setup_psr = dcn10_dmcu_setup_psr,
+	.get_psr_state = dcn10_get_dmcu_psr_state,
+	.set_psr_wait_loop = dcn10_psr_wait_loop,
+	.get_psr_wait_loop = dcn10_get_psr_wait_loop,
+	.send_edid_cea = dcn10_send_edid_cea,
+	.recv_amd_vsdb = dcn10_recv_amd_vsdb,
+	.recv_edid_cea_ack = dcn10_recv_edid_cea_ack,
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+	.forward_crc_window = dcn10_forward_crc_window,
+	.stop_crc_win_update = dcn10_stop_crc_win_update,
+#endif
+	.is_dmcu_initialized = dcn10_is_dmcu_initialized
+};
+
+static const struct dmcu_funcs dcn20_funcs = {
+	.dmcu_init = dcn10_dmcu_init,
+	.load_iram = dcn10_dmcu_load_iram,
+	.set_psr_enable = dcn10_dmcu_set_psr_enable,
+	.setup_psr = dcn10_dmcu_setup_psr,
+	.get_psr_state = dcn10_get_dmcu_psr_state,
+	.set_psr_wait_loop = dcn10_psr_wait_loop,
+	.get_psr_wait_loop = dcn10_get_psr_wait_loop,
+	.is_dmcu_initialized = dcn10_is_dmcu_initialized,
+	.lock_phy = dcn20_lock_phy,
+	.unlock_phy = dcn20_unlock_phy
+};
+
+static const struct dmcu_funcs dcn21_funcs = {
+	.dmcu_init = dcn21_dmcu_init,
+	.load_iram = dcn10_dmcu_load_iram,
+	.set_psr_enable = dcn10_dmcu_set_psr_enable,
+	.setup_psr = dcn10_dmcu_setup_psr,
+	.get_psr_state = dcn10_get_dmcu_psr_state,
+	.set_psr_wait_loop = dcn10_psr_wait_loop,
+	.get_psr_wait_loop = dcn10_get_psr_wait_loop,
+	.is_dmcu_initialized = dcn10_is_dmcu_initialized,
+	.lock_phy = dcn20_lock_phy,
+	.unlock_phy = dcn20_unlock_phy
+};
+
+static void dce_dmcu_construct(
+	struct dce_dmcu *dmcu_dce,
+	struct dc_context *ctx,
+	const struct dce_dmcu_registers *regs,
+	const struct dce_dmcu_shift *dmcu_shift,
+	const struct dce_dmcu_mask *dmcu_mask)
+{
+	struct dmcu *base = &dmcu_dce->base;
+
+	base->ctx = ctx;
+	base->funcs = &dce_funcs;
+	base->cached_wait_loop_number = 0;
+
+	dmcu_dce->regs = regs;
+	dmcu_dce->dmcu_shift = dmcu_shift;
+	dmcu_dce->dmcu_mask = dmcu_mask;
+}
+
+static void dcn21_dmcu_construct(
+		struct dce_dmcu *dmcu_dce,
+		struct dc_context *ctx,
+		const struct dce_dmcu_registers *regs,
+		const struct dce_dmcu_shift *dmcu_shift,
+		const struct dce_dmcu_mask *dmcu_mask)
+{
+	uint32_t psp_version = 0;
+
+	dce_dmcu_construct(dmcu_dce, ctx, regs, dmcu_shift, dmcu_mask);
+
+	if (!IS_FPGA_MAXIMUS_DC(ctx->dce_environment)) {
+		psp_version = dm_read_reg(ctx, mmMP0_SMN_C2PMSG_58);
+		dmcu_dce->base.auto_load_dmcu = ((psp_version & 0x00FF00FF) > 0x00110029);
+		dmcu_dce->base.psp_version = psp_version;
+	}
+}
+
+struct dmcu *dce_dmcu_create(
+	struct dc_context *ctx,
+	const struct dce_dmcu_registers *regs,
+	const struct dce_dmcu_shift *dmcu_shift,
+	const struct dce_dmcu_mask *dmcu_mask)
+{
+	struct dce_dmcu *dmcu_dce = kzalloc(sizeof(*dmcu_dce), GFP_KERNEL);
+
+	if (dmcu_dce == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dce_dmcu_construct(
+		dmcu_dce, ctx, regs, dmcu_shift, dmcu_mask);
+
+	dmcu_dce->base.funcs = &dce_funcs;
+
+	return &dmcu_dce->base;
+}
+
+struct dmcu *dcn10_dmcu_create(
+	struct dc_context *ctx,
+	const struct dce_dmcu_registers *regs,
+	const struct dce_dmcu_shift *dmcu_shift,
+	const struct dce_dmcu_mask *dmcu_mask)
+{
+	struct dce_dmcu *dmcu_dce = kzalloc(sizeof(*dmcu_dce), GFP_ATOMIC);
+
+	if (dmcu_dce == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dce_dmcu_construct(
+		dmcu_dce, ctx, regs, dmcu_shift, dmcu_mask);
+
+	dmcu_dce->base.funcs = &dcn10_funcs;
+
+	return &dmcu_dce->base;
+}
+
+struct dmcu *dcn20_dmcu_create(
+	struct dc_context *ctx,
+	const struct dce_dmcu_registers *regs,
+	const struct dce_dmcu_shift *dmcu_shift,
+	const struct dce_dmcu_mask *dmcu_mask)
+{
+	struct dce_dmcu *dmcu_dce = kzalloc(sizeof(*dmcu_dce), GFP_ATOMIC);
+
+	if (dmcu_dce == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dce_dmcu_construct(
+		dmcu_dce, ctx, regs, dmcu_shift, dmcu_mask);
+
+	dmcu_dce->base.funcs = &dcn20_funcs;
+
+	return &dmcu_dce->base;
+}
+
+struct dmcu *dcn21_dmcu_create(
+	struct dc_context *ctx,
+	const struct dce_dmcu_registers *regs,
+	const struct dce_dmcu_shift *dmcu_shift,
+	const struct dce_dmcu_mask *dmcu_mask)
+{
+	struct dce_dmcu *dmcu_dce = kzalloc(sizeof(*dmcu_dce), GFP_ATOMIC);
+
+	if (dmcu_dce == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dcn21_dmcu_construct(
+		dmcu_dce, ctx, regs, dmcu_shift, dmcu_mask);
+
+	dmcu_dce->base.funcs = &dcn21_funcs;
+
+	return &dmcu_dce->base;
+}
+
+void dce_dmcu_destroy(struct dmcu **dmcu)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(*dmcu);
+
+	kfree(dmcu_dce);
+	*dmcu = NULL;
+}