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, 991 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c
new file mode 100644
index 000000000..9501403a4
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hubbub.c
@@ -0,0 +1,991 @@
+/*
+ * Copyright 2021 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 "dcn30/dcn30_hubbub.h"
+#include "dcn32_hubbub.h"
+#include "dm_services.h"
+#include "reg_helper.h"
+
+
+#define CTX \
+	hubbub2->base.ctx
+#define DC_LOGGER \
+	hubbub2->base.ctx->logger
+#define REG(reg)\
+	hubbub2->regs->reg
+
+#undef FN
+#define FN(reg_name, field_name) \
+	hubbub2->shifts->field_name, hubbub2->masks->field_name
+
+/**
+ * @DCN32_CRB_SEGMENT_SIZE_KB: Maximum Configurable Return Buffer size for
+ * DCN32
+ */
+#define DCN32_CRB_SEGMENT_SIZE_KB 64
+
+static void dcn32_init_crb(struct hubbub *hubbub)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+
+	REG_GET(DCHUBBUB_DET0_CTRL, DET0_SIZE_CURRENT,
+		&hubbub2->det0_size);
+
+	REG_GET(DCHUBBUB_DET1_CTRL, DET1_SIZE_CURRENT,
+		&hubbub2->det1_size);
+
+	REG_GET(DCHUBBUB_DET2_CTRL, DET2_SIZE_CURRENT,
+		&hubbub2->det2_size);
+
+	REG_GET(DCHUBBUB_DET3_CTRL, DET3_SIZE_CURRENT,
+		&hubbub2->det3_size);
+
+	REG_GET(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE_CURRENT,
+		&hubbub2->compbuf_size_segments);
+
+	REG_SET_2(COMPBUF_RESERVED_SPACE, 0,
+			COMPBUF_RESERVED_SPACE_64B, hubbub2->pixel_chunk_size / 32,
+			COMPBUF_RESERVED_SPACE_ZS, hubbub2->pixel_chunk_size / 128);
+	REG_UPDATE(DCHUBBUB_DEBUG_CTRL_0, DET_DEPTH, 0x47F);
+}
+
+void hubbub32_set_request_limit(struct hubbub *hubbub, int memory_channel_count, int words_per_channel)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+
+	uint32_t request_limit = 3 * memory_channel_count * words_per_channel / 4;
+
+	ASSERT((request_limit & (~0xFFF)) == 0); //field is only 24 bits long
+	ASSERT(request_limit > 0); //field is only 24 bits long
+
+	if (request_limit > 0xFFF)
+		request_limit = 0xFFF;
+
+	if (request_limit > 0)
+		REG_UPDATE(SDPIF_REQUEST_RATE_LIMIT, SDPIF_REQUEST_RATE_LIMIT, request_limit);
+}
+
+
+void dcn32_program_det_size(struct hubbub *hubbub, int hubp_inst, unsigned int det_buffer_size_in_kbyte)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+
+	unsigned int det_size_segments = (det_buffer_size_in_kbyte + DCN32_CRB_SEGMENT_SIZE_KB - 1) / DCN32_CRB_SEGMENT_SIZE_KB;
+
+	switch (hubp_inst) {
+	case 0:
+		REG_UPDATE(DCHUBBUB_DET0_CTRL,
+					DET0_SIZE, det_size_segments);
+		hubbub2->det0_size = det_size_segments;
+		break;
+	case 1:
+		REG_UPDATE(DCHUBBUB_DET1_CTRL,
+					DET1_SIZE, det_size_segments);
+		hubbub2->det1_size = det_size_segments;
+		break;
+	case 2:
+		REG_UPDATE(DCHUBBUB_DET2_CTRL,
+					DET2_SIZE, det_size_segments);
+		hubbub2->det2_size = det_size_segments;
+		break;
+	case 3:
+		REG_UPDATE(DCHUBBUB_DET3_CTRL,
+					DET3_SIZE, det_size_segments);
+		hubbub2->det3_size = det_size_segments;
+		break;
+	default:
+		break;
+	}
+	if (hubbub2->det0_size + hubbub2->det1_size + hubbub2->det2_size
+			+ hubbub2->det3_size + hubbub2->compbuf_size_segments > hubbub2->crb_size_segs) {
+		/* This may happen during seamless transition from ODM 2:1 to ODM4:1 */
+		DC_LOG_WARNING("CRB Config Warning: DET size (%d,%d,%d,%d) + Compbuf size (%d) >  CRB segments (%d)\n",
+						hubbub2->det0_size, hubbub2->det1_size, hubbub2->det2_size, hubbub2->det3_size,
+						hubbub2->compbuf_size_segments, hubbub2->crb_size_segs);
+	}
+}
+
+static void dcn32_program_compbuf_size(struct hubbub *hubbub, unsigned int compbuf_size_kb, bool safe_to_increase)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	unsigned int compbuf_size_segments = (compbuf_size_kb + DCN32_CRB_SEGMENT_SIZE_KB - 1) / DCN32_CRB_SEGMENT_SIZE_KB;
+
+	if (safe_to_increase || compbuf_size_segments <= hubbub2->compbuf_size_segments) {
+		if (compbuf_size_segments > hubbub2->compbuf_size_segments) {
+			REG_WAIT(DCHUBBUB_DET0_CTRL, DET0_SIZE_CURRENT, hubbub2->det0_size, 1, 100);
+			REG_WAIT(DCHUBBUB_DET1_CTRL, DET1_SIZE_CURRENT, hubbub2->det1_size, 1, 100);
+			REG_WAIT(DCHUBBUB_DET2_CTRL, DET2_SIZE_CURRENT, hubbub2->det2_size, 1, 100);
+			REG_WAIT(DCHUBBUB_DET3_CTRL, DET3_SIZE_CURRENT, hubbub2->det3_size, 1, 100);
+		}
+		/* Should never be hit, if it is we have an erroneous hw config*/
+		ASSERT(hubbub2->det0_size + hubbub2->det1_size + hubbub2->det2_size
+				+ hubbub2->det3_size + compbuf_size_segments <= hubbub2->crb_size_segs);
+		REG_UPDATE(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE, compbuf_size_segments);
+		hubbub2->compbuf_size_segments = compbuf_size_segments;
+		ASSERT(REG_GET(DCHUBBUB_COMPBUF_CTRL, CONFIG_ERROR, &compbuf_size_segments) && !compbuf_size_segments);
+	}
+}
+
+static uint32_t convert_and_clamp(
+	uint32_t wm_ns,
+	uint32_t refclk_mhz,
+	uint32_t clamp_value)
+{
+	uint32_t ret_val = 0;
+	ret_val = wm_ns * refclk_mhz;
+
+	ret_val /= 1000;
+
+	if (ret_val > clamp_value)
+		ret_val = clamp_value;
+
+	return ret_val;
+}
+
+bool hubbub32_program_urgent_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+	bool wm_pending = false;
+
+	/* Repeat for water mark set A, B, C and D. */
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.urgent_ns > hubbub2->watermarks.a.urgent_ns) {
+		hubbub2->watermarks.a.urgent_ns = watermarks->a.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->a.urgent_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.urgent_ns, prog_wm_value);
+	} else if (watermarks->a.urgent_ns < hubbub2->watermarks.a.urgent_ns)
+		wm_pending = true;
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->a.frac_urg_bw_flip
+			> hubbub2->watermarks.a.frac_urg_bw_flip) {
+		hubbub2->watermarks.a.frac_urg_bw_flip = watermarks->a.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A, watermarks->a.frac_urg_bw_flip);
+	} else if (watermarks->a.frac_urg_bw_flip
+			< hubbub2->watermarks.a.frac_urg_bw_flip)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->a.frac_urg_bw_nom
+			> hubbub2->watermarks.a.frac_urg_bw_nom) {
+		hubbub2->watermarks.a.frac_urg_bw_nom = watermarks->a.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_A, watermarks->a.frac_urg_bw_nom);
+	} else if (watermarks->a.frac_urg_bw_nom
+			< hubbub2->watermarks.a.frac_urg_bw_nom)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->a.urgent_latency_ns > hubbub2->watermarks.a.urgent_latency_ns) {
+		hubbub2->watermarks.a.urgent_latency_ns = watermarks->a.urgent_latency_ns;
+		prog_wm_value = convert_and_clamp(watermarks->a.urgent_latency_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A, 0,
+				DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A, prog_wm_value);
+	} else if (watermarks->a.urgent_latency_ns < hubbub2->watermarks.a.urgent_latency_ns)
+		wm_pending = true;
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.urgent_ns > hubbub2->watermarks.b.urgent_ns) {
+		hubbub2->watermarks.b.urgent_ns = watermarks->b.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->b.urgent_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.urgent_ns, prog_wm_value);
+	} else if (watermarks->b.urgent_ns < hubbub2->watermarks.b.urgent_ns)
+		wm_pending = true;
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->b.frac_urg_bw_flip
+			> hubbub2->watermarks.b.frac_urg_bw_flip) {
+		hubbub2->watermarks.b.frac_urg_bw_flip = watermarks->b.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, watermarks->b.frac_urg_bw_flip);
+	} else if (watermarks->b.frac_urg_bw_flip
+			< hubbub2->watermarks.b.frac_urg_bw_flip)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->b.frac_urg_bw_nom
+			> hubbub2->watermarks.b.frac_urg_bw_nom) {
+		hubbub2->watermarks.b.frac_urg_bw_nom = watermarks->b.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, watermarks->b.frac_urg_bw_nom);
+	} else if (watermarks->b.frac_urg_bw_nom
+			< hubbub2->watermarks.b.frac_urg_bw_nom)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->b.urgent_latency_ns > hubbub2->watermarks.b.urgent_latency_ns) {
+		hubbub2->watermarks.b.urgent_latency_ns = watermarks->b.urgent_latency_ns;
+		prog_wm_value = convert_and_clamp(watermarks->b.urgent_latency_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, 0,
+				DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, prog_wm_value);
+	} else if (watermarks->b.urgent_latency_ns < hubbub2->watermarks.b.urgent_latency_ns)
+		wm_pending = true;
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.urgent_ns > hubbub2->watermarks.c.urgent_ns) {
+		hubbub2->watermarks.c.urgent_ns = watermarks->c.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->c.urgent_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.urgent_ns, prog_wm_value);
+	} else if (watermarks->c.urgent_ns < hubbub2->watermarks.c.urgent_ns)
+		wm_pending = true;
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->c.frac_urg_bw_flip
+			> hubbub2->watermarks.c.frac_urg_bw_flip) {
+		hubbub2->watermarks.c.frac_urg_bw_flip = watermarks->c.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, watermarks->c.frac_urg_bw_flip);
+	} else if (watermarks->c.frac_urg_bw_flip
+			< hubbub2->watermarks.c.frac_urg_bw_flip)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->c.frac_urg_bw_nom
+			> hubbub2->watermarks.c.frac_urg_bw_nom) {
+		hubbub2->watermarks.c.frac_urg_bw_nom = watermarks->c.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, watermarks->c.frac_urg_bw_nom);
+	} else if (watermarks->c.frac_urg_bw_nom
+			< hubbub2->watermarks.c.frac_urg_bw_nom)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->c.urgent_latency_ns > hubbub2->watermarks.c.urgent_latency_ns) {
+		hubbub2->watermarks.c.urgent_latency_ns = watermarks->c.urgent_latency_ns;
+		prog_wm_value = convert_and_clamp(watermarks->c.urgent_latency_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, 0,
+				DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, prog_wm_value);
+	} else if (watermarks->c.urgent_latency_ns < hubbub2->watermarks.c.urgent_latency_ns)
+		wm_pending = true;
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.urgent_ns > hubbub2->watermarks.d.urgent_ns) {
+		hubbub2->watermarks.d.urgent_ns = watermarks->d.urgent_ns;
+		prog_wm_value = convert_and_clamp(watermarks->d.urgent_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, 0,
+				DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, prog_wm_value);
+
+		DC_LOG_BANDWIDTH_CALCS("URGENCY_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.urgent_ns, prog_wm_value);
+	} else if (watermarks->d.urgent_ns < hubbub2->watermarks.d.urgent_ns)
+		wm_pending = true;
+
+	/* determine the transfer time for a quantity of data for a particular requestor.*/
+	if (safe_to_lower || watermarks->d.frac_urg_bw_flip
+			> hubbub2->watermarks.d.frac_urg_bw_flip) {
+		hubbub2->watermarks.d.frac_urg_bw_flip = watermarks->d.frac_urg_bw_flip;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, watermarks->d.frac_urg_bw_flip);
+	} else if (watermarks->d.frac_urg_bw_flip
+			< hubbub2->watermarks.d.frac_urg_bw_flip)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->d.frac_urg_bw_nom
+			> hubbub2->watermarks.d.frac_urg_bw_nom) {
+		hubbub2->watermarks.d.frac_urg_bw_nom = watermarks->d.frac_urg_bw_nom;
+
+		REG_SET(DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, 0,
+				DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, watermarks->d.frac_urg_bw_nom);
+	} else if (watermarks->d.frac_urg_bw_nom
+			< hubbub2->watermarks.d.frac_urg_bw_nom)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->d.urgent_latency_ns > hubbub2->watermarks.d.urgent_latency_ns) {
+		hubbub2->watermarks.d.urgent_latency_ns = watermarks->d.urgent_latency_ns;
+		prog_wm_value = convert_and_clamp(watermarks->d.urgent_latency_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, 0,
+				DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, prog_wm_value);
+	} else if (watermarks->d.urgent_latency_ns < hubbub2->watermarks.d.urgent_latency_ns)
+		wm_pending = true;
+
+	return wm_pending;
+}
+
+bool hubbub32_program_stutter_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+	bool wm_pending = false;
+
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub2->watermarks.a.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub2->watermarks.a.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	} else if (watermarks->a.cstate_pstate.cstate_enter_plus_exit_ns
+			< hubbub2->watermarks.a.cstate_pstate.cstate_enter_plus_exit_ns)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->a.cstate_pstate.cstate_exit_ns
+			> hubbub2->watermarks.a.cstate_pstate.cstate_exit_ns) {
+		hubbub2->watermarks.a.cstate_pstate.cstate_exit_ns =
+				watermarks->a.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->a.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	} else if (watermarks->a.cstate_pstate.cstate_exit_ns
+			< hubbub2->watermarks.a.cstate_pstate.cstate_exit_ns)
+		wm_pending = true;
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub2->watermarks.b.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub2->watermarks.b.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	} else if (watermarks->b.cstate_pstate.cstate_enter_plus_exit_ns
+			< hubbub2->watermarks.b.cstate_pstate.cstate_enter_plus_exit_ns)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->b.cstate_pstate.cstate_exit_ns
+			> hubbub2->watermarks.b.cstate_pstate.cstate_exit_ns) {
+		hubbub2->watermarks.b.cstate_pstate.cstate_exit_ns =
+				watermarks->b.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->b.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	} else if (watermarks->b.cstate_pstate.cstate_exit_ns
+			< hubbub2->watermarks.b.cstate_pstate.cstate_exit_ns)
+		wm_pending = true;
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub2->watermarks.c.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub2->watermarks.c.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	} else if (watermarks->c.cstate_pstate.cstate_enter_plus_exit_ns
+			< hubbub2->watermarks.c.cstate_pstate.cstate_enter_plus_exit_ns)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->c.cstate_pstate.cstate_exit_ns
+			> hubbub2->watermarks.c.cstate_pstate.cstate_exit_ns) {
+		hubbub2->watermarks.c.cstate_pstate.cstate_exit_ns =
+				watermarks->c.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->c.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	} else if (watermarks->c.cstate_pstate.cstate_exit_ns
+			< hubbub2->watermarks.c.cstate_pstate.cstate_exit_ns)
+		wm_pending = true;
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns
+			> hubbub2->watermarks.d.cstate_pstate.cstate_enter_plus_exit_ns) {
+		hubbub2->watermarks.d.cstate_pstate.cstate_enter_plus_exit_ns =
+				watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, 0,
+				DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_ENTER_EXIT_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns, prog_wm_value);
+	} else if (watermarks->d.cstate_pstate.cstate_enter_plus_exit_ns
+			< hubbub2->watermarks.d.cstate_pstate.cstate_enter_plus_exit_ns)
+		wm_pending = true;
+
+	if (safe_to_lower || watermarks->d.cstate_pstate.cstate_exit_ns
+			> hubbub2->watermarks.d.cstate_pstate.cstate_exit_ns) {
+		hubbub2->watermarks.d.cstate_pstate.cstate_exit_ns =
+				watermarks->d.cstate_pstate.cstate_exit_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.cstate_exit_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, 0,
+				DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("SR_EXIT_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n",
+			watermarks->d.cstate_pstate.cstate_exit_ns, prog_wm_value);
+	} else if (watermarks->d.cstate_pstate.cstate_exit_ns
+			< hubbub2->watermarks.d.cstate_pstate.cstate_exit_ns)
+		wm_pending = true;
+
+	return wm_pending;
+}
+
+
+bool hubbub32_program_pstate_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	bool wm_pending = false;
+
+	/* Section for UCLK_PSTATE_CHANGE_WATERMARKS */
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.cstate_pstate.pstate_change_ns
+			> hubbub2->watermarks.a.cstate_pstate.pstate_change_ns) {
+		hubbub2->watermarks.a.cstate_pstate.pstate_change_ns =
+				watermarks->a.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_A, 0,
+				DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->a.cstate_pstate.pstate_change_ns, prog_wm_value);
+	} else if (watermarks->a.cstate_pstate.pstate_change_ns
+			< hubbub2->watermarks.a.cstate_pstate.pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.cstate_pstate.pstate_change_ns
+			> hubbub2->watermarks.b.cstate_pstate.pstate_change_ns) {
+		hubbub2->watermarks.b.cstate_pstate.pstate_change_ns =
+				watermarks->b.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_B, 0,
+				DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->b.cstate_pstate.pstate_change_ns, prog_wm_value);
+	} else if (watermarks->b.cstate_pstate.pstate_change_ns
+			< hubbub2->watermarks.b.cstate_pstate.pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.cstate_pstate.pstate_change_ns
+			> hubbub2->watermarks.c.cstate_pstate.pstate_change_ns) {
+		hubbub2->watermarks.c.cstate_pstate.pstate_change_ns =
+				watermarks->c.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_C, 0,
+				DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->c.cstate_pstate.pstate_change_ns, prog_wm_value);
+	} else if (watermarks->c.cstate_pstate.pstate_change_ns
+			< hubbub2->watermarks.c.cstate_pstate.pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.cstate_pstate.pstate_change_ns
+			> hubbub2->watermarks.d.cstate_pstate.pstate_change_ns) {
+		hubbub2->watermarks.d.cstate_pstate.pstate_change_ns =
+				watermarks->d.cstate_pstate.pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_D, 0,
+				DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("DRAM_CLK_CHANGE_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->d.cstate_pstate.pstate_change_ns, prog_wm_value);
+	} else if (watermarks->d.cstate_pstate.pstate_change_ns
+			< hubbub2->watermarks.d.cstate_pstate.pstate_change_ns)
+		wm_pending = true;
+
+	/* Section for FCLK_PSTATE_CHANGE_WATERMARKS */
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.cstate_pstate.fclk_pstate_change_ns
+			> hubbub2->watermarks.a.cstate_pstate.fclk_pstate_change_ns) {
+		hubbub2->watermarks.a.cstate_pstate.fclk_pstate_change_ns =
+				watermarks->a.cstate_pstate.fclk_pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.cstate_pstate.fclk_pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_A, 0,
+				DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("FCLK_CHANGE_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->a.cstate_pstate.fclk_pstate_change_ns, prog_wm_value);
+	} else if (watermarks->a.cstate_pstate.fclk_pstate_change_ns
+			< hubbub2->watermarks.a.cstate_pstate.fclk_pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.cstate_pstate.fclk_pstate_change_ns
+			> hubbub2->watermarks.b.cstate_pstate.fclk_pstate_change_ns) {
+		hubbub2->watermarks.b.cstate_pstate.fclk_pstate_change_ns =
+				watermarks->b.cstate_pstate.fclk_pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.cstate_pstate.fclk_pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_B, 0,
+				DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("FCLK_CHANGE_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->b.cstate_pstate.fclk_pstate_change_ns, prog_wm_value);
+	} else if (watermarks->b.cstate_pstate.fclk_pstate_change_ns
+			< hubbub2->watermarks.b.cstate_pstate.fclk_pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.cstate_pstate.fclk_pstate_change_ns
+			> hubbub2->watermarks.c.cstate_pstate.fclk_pstate_change_ns) {
+		hubbub2->watermarks.c.cstate_pstate.fclk_pstate_change_ns =
+				watermarks->c.cstate_pstate.fclk_pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.cstate_pstate.fclk_pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_C, 0,
+				DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("FCLK_CHANGE_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->c.cstate_pstate.fclk_pstate_change_ns, prog_wm_value);
+	} else if (watermarks->c.cstate_pstate.fclk_pstate_change_ns
+			< hubbub2->watermarks.c.cstate_pstate.fclk_pstate_change_ns)
+		wm_pending = true;
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.cstate_pstate.fclk_pstate_change_ns
+			> hubbub2->watermarks.d.cstate_pstate.fclk_pstate_change_ns) {
+		hubbub2->watermarks.d.cstate_pstate.fclk_pstate_change_ns =
+				watermarks->d.cstate_pstate.fclk_pstate_change_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.cstate_pstate.fclk_pstate_change_ns,
+				refclk_mhz, 0xffff);
+		REG_SET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_D, 0,
+				DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("FCLK_CHANGE_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->d.cstate_pstate.fclk_pstate_change_ns, prog_wm_value);
+	} else if (watermarks->d.cstate_pstate.fclk_pstate_change_ns
+			< hubbub2->watermarks.d.cstate_pstate.fclk_pstate_change_ns)
+		wm_pending = true;
+
+	return wm_pending;
+}
+
+
+bool hubbub32_program_usr_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	bool wm_pending = false;
+
+	/* clock state A */
+	if (safe_to_lower || watermarks->a.usr_retraining_ns
+			> hubbub2->watermarks.a.usr_retraining_ns) {
+		hubbub2->watermarks.a.usr_retraining_ns = watermarks->a.usr_retraining_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->a.usr_retraining_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_A, 0,
+				DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_A, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("USR_RETRAINING_WATERMARK_A calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->a.usr_retraining_ns, prog_wm_value);
+	} else if (watermarks->a.usr_retraining_ns
+			< hubbub2->watermarks.a.usr_retraining_ns)
+		wm_pending = true;
+
+	/* clock state B */
+	if (safe_to_lower || watermarks->b.usr_retraining_ns
+			> hubbub2->watermarks.b.usr_retraining_ns) {
+		hubbub2->watermarks.b.usr_retraining_ns = watermarks->b.usr_retraining_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->b.usr_retraining_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_B, 0,
+				DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_B, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("USR_RETRAINING_WATERMARK_B calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->b.usr_retraining_ns, prog_wm_value);
+	} else if (watermarks->b.usr_retraining_ns
+			< hubbub2->watermarks.b.usr_retraining_ns)
+		wm_pending = true;
+
+	/* clock state C */
+	if (safe_to_lower || watermarks->c.usr_retraining_ns
+			> hubbub2->watermarks.c.usr_retraining_ns) {
+		hubbub2->watermarks.c.usr_retraining_ns =
+				watermarks->c.usr_retraining_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->c.usr_retraining_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_C, 0,
+				DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_C, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("USR_RETRAINING_WATERMARK_C calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->c.usr_retraining_ns, prog_wm_value);
+	} else if (watermarks->c.usr_retraining_ns
+			< hubbub2->watermarks.c.usr_retraining_ns)
+		wm_pending = true;
+
+	/* clock state D */
+	if (safe_to_lower || watermarks->d.usr_retraining_ns
+			> hubbub2->watermarks.d.usr_retraining_ns) {
+		hubbub2->watermarks.d.usr_retraining_ns =
+				watermarks->d.usr_retraining_ns;
+		prog_wm_value = convert_and_clamp(
+				watermarks->d.usr_retraining_ns,
+				refclk_mhz, 0x3fff);
+		REG_SET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_D, 0,
+				DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_D, prog_wm_value);
+		DC_LOG_BANDWIDTH_CALCS("USR_RETRAINING_WATERMARK_D calculated =%d\n"
+			"HW register value = 0x%x\n\n",
+			watermarks->d.usr_retraining_ns, prog_wm_value);
+	} else if (watermarks->d.usr_retraining_ns
+			< hubbub2->watermarks.d.usr_retraining_ns)
+		wm_pending = true;
+
+	return wm_pending;
+}
+
+void hubbub32_force_usr_retraining_allow(struct hubbub *hubbub, bool allow)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+
+	/*
+	 * DCHUBBUB_ARB_ALLOW_USR_RETRAINING_FORCE_ENABLE = 1 means enabling forcing value
+	 * DCHUBBUB_ARB_ALLOW_USR_RETRAINING_FORCE_VALUE = 1 or 0,  means value to be forced when force enable
+	 */
+
+	REG_UPDATE_2(DCHUBBUB_ARB_USR_RETRAINING_CNTL,
+			DCHUBBUB_ARB_ALLOW_USR_RETRAINING_FORCE_VALUE, allow,
+			DCHUBBUB_ARB_ALLOW_USR_RETRAINING_FORCE_ENABLE, allow);
+}
+
+static bool hubbub32_program_watermarks(
+		struct hubbub *hubbub,
+		struct dcn_watermark_set *watermarks,
+		unsigned int refclk_mhz,
+		bool safe_to_lower)
+{
+	bool wm_pending = false;
+
+	if (hubbub32_program_urgent_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower))
+		wm_pending = true;
+
+	if (hubbub32_program_stutter_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower))
+		wm_pending = true;
+
+	if (hubbub32_program_pstate_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower))
+		wm_pending = true;
+
+	if (hubbub32_program_usr_watermarks(hubbub, watermarks, refclk_mhz, safe_to_lower))
+		wm_pending = true;
+
+	/*
+	 * The DCHub arbiter has a mechanism to dynamically rate limit the DCHub request stream to the fabric.
+	 * If the memory controller is fully utilized and the DCHub requestors are
+	 * well ahead of their amortized schedule, then it is safe to prevent the next winner
+	 * from being committed and sent to the fabric.
+	 * The utilization of the memory controller is approximated by ensuring that
+	 * the number of outstanding requests is greater than a threshold specified
+	 * by the ARB_MIN_REQ_OUTSTANDING. To determine that the DCHub requestors are well ahead of the amortized schedule,
+	 * the slack of the next winner is compared with the ARB_SAT_LEVEL in DLG RefClk cycles.
+	 *
+	 * TODO: Revisit request limit after figure out right number. request limit for RM isn't decided yet, set maximum value (0x1FF)
+	 * to turn off it for now.
+	 */
+	/*REG_SET(DCHUBBUB_ARB_SAT_LEVEL, 0,
+			DCHUBBUB_ARB_SAT_LEVEL, 60 * refclk_mhz);
+	REG_UPDATE(DCHUBBUB_ARB_DF_REQ_OUTSTAND,
+			DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 0x1FF);*/
+
+	hubbub1_allow_self_refresh_control(hubbub, !hubbub->ctx->dc->debug.disable_stutter);
+
+	hubbub32_force_usr_retraining_allow(hubbub, hubbub->ctx->dc->debug.force_usr_allow);
+
+	return wm_pending;
+}
+
+/* Copy values from WM set A to all other sets */
+static void hubbub32_init_watermarks(struct hubbub *hubbub)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t reg;
+
+	reg = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_A);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_FLIP_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_FRAC_URG_BW_NOM_A);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_NOM_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_NOM_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_FRAC_URG_BW_NOM_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_A);
+	REG_WRITE(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_REFCYC_PER_TRIP_TO_MEMORY_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_D, reg);
+
+	reg = REG_READ(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_B, reg);
+	REG_WRITE(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_C, reg);
+	REG_WRITE(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_D, reg);
+}
+
+static void hubbub32_wm_read_state(struct hubbub *hubbub,
+		struct dcn_hubbub_wm *wm)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	struct dcn_hubbub_wm_set *s;
+
+	memset(wm, 0, sizeof(struct dcn_hubbub_wm));
+
+	s = &wm->sets[0];
+	s->wm_set = 0;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_A, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_A, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_A,
+			 DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_A, &s->dram_clk_change);
+
+	REG_GET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_A,
+			 DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_A, &s->usr_retrain);
+
+	REG_GET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_A,
+			 DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_A, &s->fclk_pstate_change);
+
+	s = &wm->sets[1];
+	s->wm_set = 1;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_B, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_B, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_B, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_B,
+			DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_B, &s->dram_clk_change);
+
+	REG_GET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_B,
+			 DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_B, &s->usr_retrain);
+
+	REG_GET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_B,
+			DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_B, &s->fclk_pstate_change);
+
+	s = &wm->sets[2];
+	s->wm_set = 2;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_C, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_C, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_C, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_C,
+			DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_C, &s->dram_clk_change);
+
+	REG_GET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_C,
+			 DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_C, &s->usr_retrain);
+
+	REG_GET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_C,
+			DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_C, &s->fclk_pstate_change);
+
+	s = &wm->sets[3];
+	s->wm_set = 3;
+	REG_GET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_D, &s->data_urgent);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D,
+			DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_D, &s->sr_enter);
+
+	REG_GET(DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D,
+			DCHUBBUB_ARB_ALLOW_SR_EXIT_WATERMARK_D, &s->sr_exit);
+
+	REG_GET(DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_D,
+			DCHUBBUB_ARB_UCLK_PSTATE_CHANGE_WATERMARK_D, &s->dram_clk_change);
+
+	REG_GET(DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_D,
+			 DCHUBBUB_ARB_USR_RETRAINING_WATERMARK_D, &s->usr_retrain);
+
+	REG_GET(DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_D,
+			DCHUBBUB_ARB_FCLK_PSTATE_CHANGE_WATERMARK_D, &s->fclk_pstate_change);
+}
+
+void hubbub32_force_wm_propagate_to_pipes(struct hubbub *hubbub)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t refclk_mhz = hubbub->ctx->dc->res_pool->ref_clocks.dchub_ref_clock_inKhz / 1000;
+	uint32_t prog_wm_value = convert_and_clamp(hubbub2->watermarks.a.urgent_ns,
+			refclk_mhz, 0x3fff);
+
+	REG_SET(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, 0,
+			DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, prog_wm_value);
+}
+
+static const struct hubbub_funcs hubbub32_funcs = {
+	.update_dchub = hubbub2_update_dchub,
+	.init_dchub_sys_ctx = hubbub3_init_dchub_sys_ctx,
+	.init_vm_ctx = hubbub2_init_vm_ctx,
+	.dcc_support_swizzle = hubbub3_dcc_support_swizzle,
+	.dcc_support_pixel_format = hubbub2_dcc_support_pixel_format,
+	.get_dcc_compression_cap = hubbub3_get_dcc_compression_cap,
+	.wm_read_state = hubbub32_wm_read_state,
+	.get_dchub_ref_freq = hubbub2_get_dchub_ref_freq,
+	.program_watermarks = hubbub32_program_watermarks,
+	.allow_self_refresh_control = hubbub1_allow_self_refresh_control,
+	.is_allow_self_refresh_enabled = hubbub1_is_allow_self_refresh_enabled,
+	.verify_allow_pstate_change_high = hubbub1_verify_allow_pstate_change_high,
+	.force_wm_propagate_to_pipes = hubbub32_force_wm_propagate_to_pipes,
+	.force_pstate_change_control = hubbub3_force_pstate_change_control,
+	.init_watermarks = hubbub32_init_watermarks,
+	.program_det_size = dcn32_program_det_size,
+	.program_compbuf_size = dcn32_program_compbuf_size,
+	.init_crb = dcn32_init_crb,
+	.hubbub_read_state = hubbub2_read_state,
+	.force_usr_retraining_allow = hubbub32_force_usr_retraining_allow,
+	.set_request_limit = hubbub32_set_request_limit
+};
+
+void hubbub32_construct(struct dcn20_hubbub *hubbub2,
+	struct dc_context *ctx,
+	const struct dcn_hubbub_registers *hubbub_regs,
+	const struct dcn_hubbub_shift *hubbub_shift,
+	const struct dcn_hubbub_mask *hubbub_mask,
+	int det_size_kb,
+	int pixel_chunk_size_kb,
+	int config_return_buffer_size_kb)
+{
+	hubbub2->base.ctx = ctx;
+	hubbub2->base.funcs = &hubbub32_funcs;
+	hubbub2->regs = hubbub_regs;
+	hubbub2->shifts = hubbub_shift;
+	hubbub2->masks = hubbub_mask;
+
+	hubbub2->debug_test_index_pstate = 0xB;
+	hubbub2->detile_buf_size = det_size_kb * 1024;
+	hubbub2->pixel_chunk_size = pixel_chunk_size_kb * 1024;
+	hubbub2->crb_size_segs = config_return_buffer_size_kb / DCN32_CRB_SEGMENT_SIZE_KB;
+}