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().
  ...

2 files changed, 1463 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/Makefile b/drivers/gpu/drm/amd/display/modules/freesync/Makefile
new file mode 100644
index 000000000..fb9a49978
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/freesync/Makefile
@@ -0,0 +1,31 @@
+#
+# Copyright 2017 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.
+#
+#
+# Makefile for the 'freesync' sub-module of DAL.
+#
+
+FREESYNC = freesync.o
+
+AMD_DAL_FREESYNC = $(addprefix $(AMDDALPATH)/modules/freesync/,$(FREESYNC))
+#$(info ************  DAL-FREE SYNC_MAKEFILE ************)
+
+AMD_DISPLAY_FILES += $(AMD_DAL_FREESYNC)
diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
new file mode 100644
index 000000000..c2e00f7b8
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -0,0 +1,1432 @@
+/*
+ * Copyright 2016 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 "dm_services.h"
+#include "dc.h"
+#include "mod_freesync.h"
+#include "core_types.h"
+
+#define MOD_FREESYNC_MAX_CONCURRENT_STREAMS  32
+
+#define MIN_REFRESH_RANGE 10
+/* Refresh rate ramp at a fixed rate of 65 Hz/second */
+#define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65)
+/* Number of elements in the render times cache array */
+#define RENDER_TIMES_MAX_COUNT 10
+/* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */
+#define BTR_MAX_MARGIN 2500
+/* Threshold to change BTR multiplier (to avoid frequent changes) */
+#define BTR_DRIFT_MARGIN 2000
+/* Threshold to exit fixed refresh rate */
+#define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 1
+/* Number of consecutive frames to check before entering/exiting fixed refresh */
+#define FIXED_REFRESH_ENTER_FRAME_COUNT 5
+#define FIXED_REFRESH_EXIT_FRAME_COUNT 10
+/* Flip interval workaround constants */
+#define VSYNCS_BETWEEN_FLIP_THRESHOLD 2
+#define FREESYNC_CONSEC_FLIP_AFTER_VSYNC 5
+#define FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US 500
+
+struct core_freesync {
+	struct mod_freesync public;
+	struct dc *dc;
+};
+
+#define MOD_FREESYNC_TO_CORE(mod_freesync)\
+		container_of(mod_freesync, struct core_freesync, public)
+
+struct mod_freesync *mod_freesync_create(struct dc *dc)
+{
+	struct core_freesync *core_freesync =
+			kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
+
+	if (core_freesync == NULL)
+		goto fail_alloc_context;
+
+	if (dc == NULL)
+		goto fail_construct;
+
+	core_freesync->dc = dc;
+	return &core_freesync->public;
+
+fail_construct:
+	kfree(core_freesync);
+
+fail_alloc_context:
+	return NULL;
+}
+
+void mod_freesync_destroy(struct mod_freesync *mod_freesync)
+{
+	struct core_freesync *core_freesync = NULL;
+	if (mod_freesync == NULL)
+		return;
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+	kfree(core_freesync);
+}
+
+#if 0 /* Unused currently */
+static unsigned int calc_refresh_in_uhz_from_duration(
+		unsigned int duration_in_ns)
+{
+	unsigned int refresh_in_uhz =
+			((unsigned int)(div64_u64((1000000000ULL * 1000000),
+					duration_in_ns)));
+	return refresh_in_uhz;
+}
+#endif
+
+static unsigned int calc_duration_in_us_from_refresh_in_uhz(
+		unsigned int refresh_in_uhz)
+{
+	unsigned int duration_in_us =
+			((unsigned int)(div64_u64((1000000000ULL * 1000),
+					refresh_in_uhz)));
+	return duration_in_us;
+}
+
+static unsigned int calc_duration_in_us_from_v_total(
+		const struct dc_stream_state *stream,
+		const struct mod_vrr_params *in_vrr,
+		unsigned int v_total)
+{
+	unsigned int duration_in_us =
+			(unsigned int)(div64_u64(((unsigned long long)(v_total)
+				* 10000) * stream->timing.h_total,
+					stream->timing.pix_clk_100hz));
+
+	return duration_in_us;
+}
+
+unsigned int mod_freesync_calc_v_total_from_refresh(
+		const struct dc_stream_state *stream,
+		unsigned int refresh_in_uhz)
+{
+	unsigned int v_total;
+	unsigned int frame_duration_in_ns;
+
+	frame_duration_in_ns =
+			((unsigned int)(div64_u64((1000000000ULL * 1000000),
+					refresh_in_uhz)));
+
+	v_total = div64_u64(div64_u64(((unsigned long long)(
+			frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)),
+			stream->timing.h_total), 1000000);
+
+	/* v_total cannot be less than nominal */
+	if (v_total < stream->timing.v_total) {
+		ASSERT(v_total < stream->timing.v_total);
+		v_total = stream->timing.v_total;
+	}
+
+	return v_total;
+}
+
+static unsigned int calc_v_total_from_duration(
+		const struct dc_stream_state *stream,
+		const struct mod_vrr_params *vrr,
+		unsigned int duration_in_us)
+{
+	unsigned int v_total = 0;
+
+	if (duration_in_us < vrr->min_duration_in_us)
+		duration_in_us = vrr->min_duration_in_us;
+
+	if (duration_in_us > vrr->max_duration_in_us)
+		duration_in_us = vrr->max_duration_in_us;
+
+	if (dc_is_hdmi_signal(stream->signal)) {
+		uint32_t h_total_up_scaled;
+
+		h_total_up_scaled = stream->timing.h_total * 10000;
+		v_total = div_u64((unsigned long long)duration_in_us
+					* stream->timing.pix_clk_100hz + (h_total_up_scaled - 1),
+					h_total_up_scaled);
+	} else {
+		v_total = div64_u64(div64_u64(((unsigned long long)(
+					duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
+					stream->timing.h_total), 1000);
+	}
+
+	/* v_total cannot be less than nominal */
+	if (v_total < stream->timing.v_total) {
+		ASSERT(v_total < stream->timing.v_total);
+		v_total = stream->timing.v_total;
+	}
+
+	return v_total;
+}
+
+static void update_v_total_for_static_ramp(
+		struct core_freesync *core_freesync,
+		const struct dc_stream_state *stream,
+		struct mod_vrr_params *in_out_vrr)
+{
+	unsigned int v_total = 0;
+	unsigned int current_duration_in_us =
+			calc_duration_in_us_from_v_total(
+				stream, in_out_vrr,
+				in_out_vrr->adjust.v_total_max);
+	unsigned int target_duration_in_us =
+			calc_duration_in_us_from_refresh_in_uhz(
+				in_out_vrr->fixed.target_refresh_in_uhz);
+	bool ramp_direction_is_up = (current_duration_in_us >
+				target_duration_in_us) ? true : false;
+
+	/* Calculate ratio between new and current frame duration with 3 digit */
+	unsigned int frame_duration_ratio = div64_u64(1000000,
+		(1000 +  div64_u64(((unsigned long long)(
+		STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) *
+		current_duration_in_us),
+		1000000)));
+
+	/* Calculate delta between new and current frame duration in us */
+	unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
+		current_duration_in_us) *
+		(1000 - frame_duration_ratio)), 1000);
+
+	/* Adjust frame duration delta based on ratio between current and
+	 * standard frame duration (frame duration at 60 Hz refresh rate).
+	 */
+	unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)(
+		frame_duration_delta) * current_duration_in_us), 16666);
+
+	/* Going to a higher refresh rate (lower frame duration) */
+	if (ramp_direction_is_up) {
+		/* Reduce frame duration */
+		current_duration_in_us -= ramp_rate_interpolated;
+
+		/* Adjust for frame duration below min */
+		if (current_duration_in_us <= target_duration_in_us) {
+			in_out_vrr->fixed.ramping_active = false;
+			in_out_vrr->fixed.ramping_done = true;
+			current_duration_in_us =
+				calc_duration_in_us_from_refresh_in_uhz(
+				in_out_vrr->fixed.target_refresh_in_uhz);
+		}
+	/* Going to a lower refresh rate (larger frame duration) */
+	} else {
+		/* Increase frame duration */
+		current_duration_in_us += ramp_rate_interpolated;
+
+		/* Adjust for frame duration above max */
+		if (current_duration_in_us >= target_duration_in_us) {
+			in_out_vrr->fixed.ramping_active = false;
+			in_out_vrr->fixed.ramping_done = true;
+			current_duration_in_us =
+				calc_duration_in_us_from_refresh_in_uhz(
+				in_out_vrr->fixed.target_refresh_in_uhz);
+		}
+	}
+
+	v_total = div64_u64(div64_u64(((unsigned long long)(
+			current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)),
+				stream->timing.h_total), 1000);
+
+	/* v_total cannot be less than nominal */
+	if (v_total < stream->timing.v_total)
+		v_total = stream->timing.v_total;
+
+	in_out_vrr->adjust.v_total_min = v_total;
+	in_out_vrr->adjust.v_total_max = v_total;
+}
+
+static void apply_below_the_range(struct core_freesync *core_freesync,
+		const struct dc_stream_state *stream,
+		unsigned int last_render_time_in_us,
+		struct mod_vrr_params *in_out_vrr)
+{
+	unsigned int inserted_frame_duration_in_us = 0;
+	unsigned int mid_point_frames_ceil = 0;
+	unsigned int mid_point_frames_floor = 0;
+	unsigned int frame_time_in_us = 0;
+	unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF;
+	unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF;
+	unsigned int frames_to_insert = 0;
+	unsigned int delta_from_mid_point_delta_in_us;
+	unsigned int max_render_time_in_us =
+			in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us;
+
+	/* Program BTR */
+	if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) {
+		/* Exit Below the Range */
+		if (in_out_vrr->btr.btr_active) {
+			in_out_vrr->btr.frame_counter = 0;
+			in_out_vrr->btr.btr_active = false;
+		}
+	} else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) {
+		/* Enter Below the Range */
+		if (!in_out_vrr->btr.btr_active) {
+			in_out_vrr->btr.btr_active = true;
+		}
+	}
+
+	/* BTR set to "not active" so disengage */
+	if (!in_out_vrr->btr.btr_active) {
+		in_out_vrr->btr.inserted_duration_in_us = 0;
+		in_out_vrr->btr.frames_to_insert = 0;
+		in_out_vrr->btr.frame_counter = 0;
+
+		/* Restore FreeSync */
+		in_out_vrr->adjust.v_total_min =
+			mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->max_refresh_in_uhz);
+		in_out_vrr->adjust.v_total_max =
+			mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->min_refresh_in_uhz);
+	/* BTR set to "active" so engage */
+	} else {
+
+		/* Calculate number of midPoint frames that could fit within
+		 * the render time interval - take ceil of this value
+		 */
+		mid_point_frames_ceil = (last_render_time_in_us +
+				in_out_vrr->btr.mid_point_in_us - 1) /
+					in_out_vrr->btr.mid_point_in_us;
+
+		if (mid_point_frames_ceil > 0) {
+			frame_time_in_us = last_render_time_in_us /
+				mid_point_frames_ceil;
+			delta_from_mid_point_in_us_1 =
+				(in_out_vrr->btr.mid_point_in_us >
+				frame_time_in_us) ?
+				(in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
+				(frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
+		}
+
+		/* Calculate number of midPoint frames that could fit within
+		 * the render time interval - take floor of this value
+		 */
+		mid_point_frames_floor = last_render_time_in_us /
+				in_out_vrr->btr.mid_point_in_us;
+
+		if (mid_point_frames_floor > 0) {
+
+			frame_time_in_us = last_render_time_in_us /
+				mid_point_frames_floor;
+			delta_from_mid_point_in_us_2 =
+				(in_out_vrr->btr.mid_point_in_us >
+				frame_time_in_us) ?
+				(in_out_vrr->btr.mid_point_in_us - frame_time_in_us) :
+				(frame_time_in_us - in_out_vrr->btr.mid_point_in_us);
+		}
+
+		/* Choose number of frames to insert based on how close it
+		 * can get to the mid point of the variable range.
+		 *  - Delta for CEIL: delta_from_mid_point_in_us_1
+		 *  - Delta for FLOOR: delta_from_mid_point_in_us_2
+		 */
+		if ((last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) {
+			/* Check for out of range.
+			 * If using CEIL produces a value that is out of range,
+			 * then we are forced to use FLOOR.
+			 */
+			frames_to_insert = mid_point_frames_floor;
+		} else if (mid_point_frames_floor < 2) {
+			/* Check if FLOOR would result in non-LFC. In this case
+			 * choose to use CEIL
+			 */
+			frames_to_insert = mid_point_frames_ceil;
+		} else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
+			/* If choosing CEIL results in a frame duration that is
+			 * closer to the mid point of the range.
+			 * Choose CEIL
+			 */
+			frames_to_insert = mid_point_frames_ceil;
+		} else {
+			/* If choosing FLOOR results in a frame duration that is
+			 * closer to the mid point of the range.
+			 * Choose FLOOR
+			 */
+			frames_to_insert = mid_point_frames_floor;
+		}
+
+		/* Prefer current frame multiplier when BTR is enabled unless it drifts
+		 * too far from the midpoint
+		 */
+		if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
+			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 -
+					delta_from_mid_point_in_us_1;
+		} else {
+			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
+					delta_from_mid_point_in_us_2;
+		}
+		if (in_out_vrr->btr.frames_to_insert != 0 &&
+				delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) {
+			if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) <
+					max_render_time_in_us) &&
+				((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) >
+					in_out_vrr->min_duration_in_us))
+				frames_to_insert = in_out_vrr->btr.frames_to_insert;
+		}
+
+		/* Either we've calculated the number of frames to insert,
+		 * or we need to insert min duration frames
+		 */
+		if (last_render_time_in_us / frames_to_insert <
+				in_out_vrr->min_duration_in_us){
+			frames_to_insert -= (frames_to_insert > 1) ?
+					1 : 0;
+		}
+
+		if (frames_to_insert > 0)
+			inserted_frame_duration_in_us = last_render_time_in_us /
+							frames_to_insert;
+
+		if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us)
+			inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us;
+
+		/* Cache the calculated variables */
+		in_out_vrr->btr.inserted_duration_in_us =
+			inserted_frame_duration_in_us;
+		in_out_vrr->btr.frames_to_insert = frames_to_insert;
+		in_out_vrr->btr.frame_counter = frames_to_insert;
+	}
+}
+
+static void apply_fixed_refresh(struct core_freesync *core_freesync,
+		const struct dc_stream_state *stream,
+		unsigned int last_render_time_in_us,
+		struct mod_vrr_params *in_out_vrr)
+{
+	bool update = false;
+	unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
+
+	/* Compute the exit refresh rate and exit frame duration */
+	unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us)
+			+ (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ));
+	unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz;
+
+	if (last_render_time_in_us < exit_frame_duration_in_us) {
+		/* Exit Fixed Refresh mode */
+		if (in_out_vrr->fixed.fixed_active) {
+			in_out_vrr->fixed.frame_counter++;
+
+			if (in_out_vrr->fixed.frame_counter >
+					FIXED_REFRESH_EXIT_FRAME_COUNT) {
+				in_out_vrr->fixed.frame_counter = 0;
+				in_out_vrr->fixed.fixed_active = false;
+				in_out_vrr->fixed.target_refresh_in_uhz = 0;
+				update = true;
+			}
+		} else
+			in_out_vrr->fixed.frame_counter = 0;
+	} else if (last_render_time_in_us > max_render_time_in_us) {
+		/* Enter Fixed Refresh mode */
+		if (!in_out_vrr->fixed.fixed_active) {
+			in_out_vrr->fixed.frame_counter++;
+
+			if (in_out_vrr->fixed.frame_counter >
+					FIXED_REFRESH_ENTER_FRAME_COUNT) {
+				in_out_vrr->fixed.frame_counter = 0;
+				in_out_vrr->fixed.fixed_active = true;
+				in_out_vrr->fixed.target_refresh_in_uhz =
+						in_out_vrr->max_refresh_in_uhz;
+				update = true;
+			}
+		} else
+			in_out_vrr->fixed.frame_counter = 0;
+	}
+
+	if (update) {
+		if (in_out_vrr->fixed.fixed_active) {
+			in_out_vrr->adjust.v_total_min =
+				mod_freesync_calc_v_total_from_refresh(
+				stream, in_out_vrr->max_refresh_in_uhz);
+			in_out_vrr->adjust.v_total_max =
+					in_out_vrr->adjust.v_total_min;
+		} else {
+			in_out_vrr->adjust.v_total_min =
+				mod_freesync_calc_v_total_from_refresh(stream,
+					in_out_vrr->max_refresh_in_uhz);
+			in_out_vrr->adjust.v_total_max =
+				mod_freesync_calc_v_total_from_refresh(stream,
+					in_out_vrr->min_refresh_in_uhz);
+		}
+	}
+}
+
+static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr,
+		unsigned int curr_time_stamp_in_us)
+{
+	in_vrr->flip_interval.vsync_to_flip_in_us = curr_time_stamp_in_us -
+			in_vrr->flip_interval.v_update_timestamp_in_us;
+
+	/* Determine conditions for stopping workaround */
+	if (in_vrr->flip_interval.flip_interval_workaround_active &&
+			in_vrr->flip_interval.vsyncs_between_flip < VSYNCS_BETWEEN_FLIP_THRESHOLD &&
+			in_vrr->flip_interval.vsync_to_flip_in_us > FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) {
+		in_vrr->flip_interval.flip_interval_detect_counter = 0;
+		in_vrr->flip_interval.program_flip_interval_workaround = true;
+		in_vrr->flip_interval.flip_interval_workaround_active = false;
+	} else {
+		/* Determine conditions for starting workaround */
+		if (in_vrr->flip_interval.vsyncs_between_flip >= VSYNCS_BETWEEN_FLIP_THRESHOLD &&
+				in_vrr->flip_interval.vsync_to_flip_in_us < FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) {
+			/* Increase flip interval counter we have 2 vsyncs between flips and
+			 * vsync to flip interval is less than 500us
+			 */
+			in_vrr->flip_interval.flip_interval_detect_counter++;
+			if (in_vrr->flip_interval.flip_interval_detect_counter > FREESYNC_CONSEC_FLIP_AFTER_VSYNC) {
+				/* Start workaround if we detect 5 consecutive instances of the above case */
+				in_vrr->flip_interval.program_flip_interval_workaround = true;
+				in_vrr->flip_interval.flip_interval_workaround_active = true;
+			}
+		} else {
+			/* Reset the flip interval counter if we condition is no longer met */
+			in_vrr->flip_interval.flip_interval_detect_counter = 0;
+		}
+	}
+
+	in_vrr->flip_interval.vsyncs_between_flip = 0;
+}
+
+static bool vrr_settings_require_update(struct core_freesync *core_freesync,
+		struct mod_freesync_config *in_config,
+		unsigned int min_refresh_in_uhz,
+		unsigned int max_refresh_in_uhz,
+		struct mod_vrr_params *in_vrr)
+{
+	if (in_vrr->state != in_config->state) {
+		return true;
+	} else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED &&
+			in_vrr->fixed.target_refresh_in_uhz !=
+					in_config->fixed_refresh_in_uhz) {
+		return true;
+	} else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) {
+		return true;
+	} else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) {
+		return true;
+	}
+
+	return false;
+}
+
+bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
+		const struct dc_stream_state *stream,
+		unsigned int *vmin,
+		unsigned int *vmax)
+{
+	*vmin = stream->adjust.v_total_min;
+	*vmax = stream->adjust.v_total_max;
+
+	return true;
+}
+
+bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
+		struct dc_stream_state *stream,
+		unsigned int *nom_v_pos,
+		unsigned int *v_pos)
+{
+	struct core_freesync *core_freesync = NULL;
+	struct crtc_position position;
+
+	if (mod_freesync == NULL)
+		return false;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+
+	if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1,
+					&position.vertical_count,
+					&position.nominal_vcount)) {
+
+		*nom_v_pos = position.nominal_vcount;
+		*v_pos = position.vertical_count;
+
+		return true;
+	}
+
+	return false;
+}
+
+static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket,
+		bool freesync_on_desktop)
+{
+	/* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
+	infopacket->sb[1] = 0x1A;
+
+	/* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
+	infopacket->sb[2] = 0x00;
+
+	/* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
+	infopacket->sb[3] = 0x00;
+
+	/* PB4 = Reserved */
+
+	/* PB5 = Reserved */
+
+	/* PB6 = [Bits 7:3 = Reserved] */
+
+	/* PB6 = [Bit 0 = FreeSync Supported] */
+	if (vrr->state != VRR_STATE_UNSUPPORTED)
+		infopacket->sb[6] |= 0x01;
+
+	/* PB6 = [Bit 1 = FreeSync Enabled] */
+	if (vrr->state != VRR_STATE_DISABLED &&
+			vrr->state != VRR_STATE_UNSUPPORTED)
+		infopacket->sb[6] |= 0x02;
+
+	if (freesync_on_desktop) {
+		/* PB6 = [Bit 2 = FreeSync Active] */
+		if (vrr->state != VRR_STATE_DISABLED &&
+			vrr->state != VRR_STATE_UNSUPPORTED)
+			infopacket->sb[6] |= 0x04;
+	} else {
+		if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
+			vrr->state == VRR_STATE_ACTIVE_FIXED)
+			infopacket->sb[6] |= 0x04;
+	}
+
+	// For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range
+	/* PB7 = FreeSync Minimum refresh rate (Hz) */
+	if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
+			vrr->state == VRR_STATE_ACTIVE_FIXED) {
+		infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000);
+	} else {
+		infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
+	}
+
+	/* PB8 = FreeSync Maximum refresh rate (Hz)
+	 * Note: We should never go above the field rate of the mode timing set.
+	 */
+	infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000);
+}
+
+static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket)
+{
+	unsigned int min_refresh;
+	unsigned int max_refresh;
+	unsigned int fixed_refresh;
+	unsigned int min_programmed;
+	unsigned int max_programmed;
+
+	/* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */
+	infopacket->sb[1] = 0x1A;
+
+	/* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */
+	infopacket->sb[2] = 0x00;
+
+	/* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */
+	infopacket->sb[3] = 0x00;
+
+	/* PB4 = Reserved */
+
+	/* PB5 = Reserved */
+
+	/* PB6 = [Bits 7:3 = Reserved] */
+
+	/* PB6 = [Bit 0 = FreeSync Supported] */
+	if (vrr->state != VRR_STATE_UNSUPPORTED)
+		infopacket->sb[6] |= 0x01;
+
+	/* PB6 = [Bit 1 = FreeSync Enabled] */
+	if (vrr->state != VRR_STATE_DISABLED &&
+			vrr->state != VRR_STATE_UNSUPPORTED)
+		infopacket->sb[6] |= 0x02;
+
+	/* PB6 = [Bit 2 = FreeSync Active] */
+	if (vrr->state == VRR_STATE_ACTIVE_VARIABLE ||
+			vrr->state == VRR_STATE_ACTIVE_FIXED)
+		infopacket->sb[6] |= 0x04;
+
+	min_refresh = (vrr->min_refresh_in_uhz + 500000) / 1000000;
+	max_refresh = (vrr->max_refresh_in_uhz + 500000) / 1000000;
+	fixed_refresh = (vrr->fixed_refresh_in_uhz + 500000) / 1000000;
+
+	min_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh :
+			(vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? min_refresh :
+			(vrr->state == VRR_STATE_INACTIVE) ? min_refresh :
+			max_refresh; // Non-fs case, program nominal range
+
+	max_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh :
+			(vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? max_refresh :
+			max_refresh;// Non-fs case, program nominal range
+
+	/* PB7 = FreeSync Minimum refresh rate (Hz) */
+	infopacket->sb[7] = min_programmed & 0xFF;
+
+	/* PB8 = FreeSync Maximum refresh rate (Hz) */
+	infopacket->sb[8] = max_programmed & 0xFF;
+
+	/* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */
+	infopacket->sb[11] = (min_programmed >> 8) & 0x03;
+
+	/* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */
+	infopacket->sb[12] = (max_programmed >> 8) & 0x03;
+
+	/* PB16 : Reserved bits 7:1, FixedRate bit 0 */
+	infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 0;
+}
+
+static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf,
+		struct dc_info_packet *infopacket)
+{
+	if (app_tf != TRANSFER_FUNC_UNKNOWN) {
+		infopacket->valid = true;
+
+		if (app_tf != TRANSFER_FUNC_PQ2084) {
+			infopacket->sb[6] |= 0x08;  // PB6 = [Bit 3 = Native Color Active]
+			if (app_tf == TRANSFER_FUNC_GAMMA_22)
+				infopacket->sb[9] |= 0x04;  // PB6 = [Bit 2 = Gamma 2.2 EOTF Active]
+		}
+	}
+}
+
+static void build_vrr_infopacket_header_v1(enum signal_type signal,
+		struct dc_info_packet *infopacket,
+		unsigned int *payload_size)
+{
+	if (dc_is_hdmi_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB1  = Version = 0x01 */
+		infopacket->hb1 = 0x01;
+
+		/* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */
+		infopacket->hb2 = 0x08;
+
+		*payload_size = 0x08;
+
+	} else if (dc_is_dp_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Secondary-data Packet ID = 0 - Only non-zero
+		 *	  when used to associate audio related info packets
+		 */
+		infopacket->hb0 = 0x00;
+
+		/* HB1  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB2  = [Bits 7:0 = Least significant eight bits -
+		 *	  For INFOFRAME, the value must be 1Bh]
+		 */
+		infopacket->hb2 = 0x1B;
+
+		/* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1]
+		 *	  [Bits 1:0 = Most significant two bits = 0x00]
+		 */
+		infopacket->hb3 = 0x04;
+
+		*payload_size = 0x1B;
+	}
+}
+
+static void build_vrr_infopacket_header_v2(enum signal_type signal,
+		struct dc_info_packet *infopacket,
+		unsigned int *payload_size)
+{
+	if (dc_is_hdmi_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB1  = Version = 0x02 */
+		infopacket->hb1 = 0x02;
+
+		/* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */
+		infopacket->hb2 = 0x09;
+
+		*payload_size = 0x09;
+	} else if (dc_is_dp_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Secondary-data Packet ID = 0 - Only non-zero
+		 *	  when used to associate audio related info packets
+		 */
+		infopacket->hb0 = 0x00;
+
+		/* HB1  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB2  = [Bits 7:0 = Least significant eight bits -
+		 *	  For INFOFRAME, the value must be 1Bh]
+		 */
+		infopacket->hb2 = 0x1B;
+
+		/* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
+		 *	  [Bits 1:0 = Most significant two bits = 0x00]
+		 */
+		infopacket->hb3 = 0x08;
+
+		*payload_size = 0x1B;
+	}
+}
+
+static void build_vrr_infopacket_header_v3(enum signal_type signal,
+		struct dc_info_packet *infopacket,
+		unsigned int *payload_size)
+{
+	unsigned char version;
+
+	version = 3;
+	if (dc_is_hdmi_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB1  = Version = 0x03 */
+		infopacket->hb1 = version;
+
+		/* HB2  = [Bits 7:5 = 0] [Bits 4:0 = Length] */
+		infopacket->hb2 = 0x10;
+
+		*payload_size = 0x10;
+	} else if (dc_is_dp_signal(signal)) {
+
+		/* HEADER */
+
+		/* HB0  = Secondary-data Packet ID = 0 - Only non-zero
+		 *	  when used to associate audio related info packets
+		 */
+		infopacket->hb0 = 0x00;
+
+		/* HB1  = Packet Type = 0x83 (Source Product
+		 *	  Descriptor InfoFrame)
+		 */
+		infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD;
+
+		/* HB2  = [Bits 7:0 = Least significant eight bits -
+		 *	  For INFOFRAME, the value must be 1Bh]
+		 */
+		infopacket->hb2 = 0x1B;
+
+		/* HB3  = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2]
+		 *	  [Bits 1:0 = Most significant two bits = 0x00]
+		 */
+
+		infopacket->hb3 = (version & 0x3F) << 2;
+
+		*payload_size = 0x1B;
+	}
+}
+
+static void build_vrr_infopacket_checksum(unsigned int *payload_size,
+		struct dc_info_packet *infopacket)
+{
+	/* Calculate checksum */
+	unsigned int idx = 0;
+	unsigned char checksum = 0;
+
+	checksum += infopacket->hb0;
+	checksum += infopacket->hb1;
+	checksum += infopacket->hb2;
+	checksum += infopacket->hb3;
+
+	for (idx = 1; idx <= *payload_size; idx++)
+		checksum += infopacket->sb[idx];
+
+	/* PB0 = Checksum (one byte complement) */
+	infopacket->sb[0] = (unsigned char)(0x100 - checksum);
+
+	infopacket->valid = true;
+}
+
+static void build_vrr_infopacket_v1(enum signal_type signal,
+		const struct mod_vrr_params *vrr,
+		struct dc_info_packet *infopacket,
+		bool freesync_on_desktop)
+{
+	/* SPD info packet for FreeSync */
+	unsigned int payload_size = 0;
+
+	build_vrr_infopacket_header_v1(signal, infopacket, &payload_size);
+	build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop);
+	build_vrr_infopacket_checksum(&payload_size, infopacket);
+
+	infopacket->valid = true;
+}
+
+static void build_vrr_infopacket_v2(enum signal_type signal,
+		const struct mod_vrr_params *vrr,
+		enum color_transfer_func app_tf,
+		struct dc_info_packet *infopacket,
+		bool freesync_on_desktop)
+{
+	unsigned int payload_size = 0;
+
+	build_vrr_infopacket_header_v2(signal, infopacket, &payload_size);
+	build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop);
+
+	build_vrr_infopacket_fs2_data(app_tf, infopacket);
+
+	build_vrr_infopacket_checksum(&payload_size, infopacket);
+
+	infopacket->valid = true;
+}
+#ifndef TRIM_FSFT
+static void build_vrr_infopacket_fast_transport_data(
+	bool ftActive,
+	unsigned int ftOutputRate,
+	struct dc_info_packet *infopacket)
+{
+	/* PB9 : bit7 - fast transport Active*/
+	unsigned char activeBit = (ftActive) ? 1 << 7 : 0;
+
+	infopacket->sb[1] &= ~activeBit;  //clear bit
+	infopacket->sb[1] |=  activeBit;  //set bit
+
+	/* PB13 : Target Output Pixel Rate [kHz] - bits 7:0  */
+	infopacket->sb[13] = ftOutputRate & 0xFF;
+
+	/* PB14 : Target Output Pixel Rate [kHz] - bits 15:8  */
+	infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF;
+
+	/* PB15 : Target Output Pixel Rate [kHz] - bits 23:16  */
+	infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF;
+
+}
+#endif
+
+static void build_vrr_infopacket_v3(enum signal_type signal,
+		const struct mod_vrr_params *vrr,
+#ifndef TRIM_FSFT
+		bool ftActive, unsigned int ftOutputRate,
+#endif
+		enum color_transfer_func app_tf,
+		struct dc_info_packet *infopacket)
+{
+	unsigned int payload_size = 0;
+
+	build_vrr_infopacket_header_v3(signal, infopacket, &payload_size);
+	build_vrr_infopacket_data_v3(vrr, infopacket);
+
+	build_vrr_infopacket_fs2_data(app_tf, infopacket);
+
+#ifndef TRIM_FSFT
+	build_vrr_infopacket_fast_transport_data(
+			ftActive,
+			ftOutputRate,
+			infopacket);
+#endif
+
+	build_vrr_infopacket_checksum(&payload_size, infopacket);
+
+	infopacket->valid = true;
+}
+
+static void build_vrr_infopacket_sdp_v1_3(enum vrr_packet_type packet_type,
+										struct dc_info_packet *infopacket)
+{
+	uint8_t idx = 0, size = 0;
+
+	size = ((packet_type == PACKET_TYPE_FS_V1) ? 0x08 :
+			(packet_type == PACKET_TYPE_FS_V3) ? 0x10 :
+												0x09);
+
+	for (idx = infopacket->hb2; idx > 1; idx--) // Data Byte Count: 0x1B
+		infopacket->sb[idx] = infopacket->sb[idx-1];
+
+	infopacket->sb[1] = size;                         // Length
+	infopacket->sb[0] = (infopacket->hb3 >> 2) & 0x3F;//Version
+	infopacket->hb3   = (0x13 << 2);                  // Header,SDP 1.3
+	infopacket->hb2   = 0x1D;
+}
+
+void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync,
+		const struct dc_stream_state *stream,
+		const struct mod_vrr_params *vrr,
+		enum vrr_packet_type packet_type,
+		enum color_transfer_func app_tf,
+		struct dc_info_packet *infopacket,
+		bool pack_sdp_v1_3)
+{
+	/* SPD info packet for FreeSync
+	 * VTEM info packet for HdmiVRR
+	 * Check if Freesync is supported. Return if false. If true,
+	 * set the corresponding bit in the info packet
+	 */
+	if (!vrr->send_info_frame)
+		return;
+
+	switch (packet_type) {
+	case PACKET_TYPE_FS_V3:
+#ifndef TRIM_FSFT
+		// always populate with pixel rate.
+		build_vrr_infopacket_v3(
+				stream->signal, vrr,
+				stream->timing.flags.FAST_TRANSPORT,
+				(stream->timing.flags.FAST_TRANSPORT) ?
+						stream->timing.fast_transport_output_rate_100hz :
+						stream->timing.pix_clk_100hz,
+				app_tf, infopacket);
+#else
+		build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket);
+#endif
+		break;
+	case PACKET_TYPE_FS_V2:
+		build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop);
+		break;
+	case PACKET_TYPE_VRR:
+	case PACKET_TYPE_FS_V1:
+	default:
+		build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop);
+	}
+
+	if (true == pack_sdp_v1_3 &&
+		true == dc_is_dp_signal(stream->signal) &&
+		packet_type != PACKET_TYPE_VRR &&
+		packet_type != PACKET_TYPE_VTEM)
+		build_vrr_infopacket_sdp_v1_3(packet_type, infopacket);
+}
+
+void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync,
+		const struct dc_stream_state *stream,
+		struct mod_freesync_config *in_config,
+		struct mod_vrr_params *in_out_vrr)
+{
+	struct core_freesync *core_freesync = NULL;
+	unsigned long long nominal_field_rate_in_uhz = 0;
+	unsigned long long rounded_nominal_in_uhz = 0;
+	unsigned int refresh_range = 0;
+	unsigned long long min_refresh_in_uhz = 0;
+	unsigned long long max_refresh_in_uhz = 0;
+
+	if (mod_freesync == NULL)
+		return;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+
+	/* Calculate nominal field rate for stream */
+	nominal_field_rate_in_uhz =
+			mod_freesync_calc_nominal_field_rate(stream);
+
+	min_refresh_in_uhz = in_config->min_refresh_in_uhz;
+	max_refresh_in_uhz = in_config->max_refresh_in_uhz;
+
+	/* Full range may be larger than current video timing, so cap at nominal */
+	if (max_refresh_in_uhz > nominal_field_rate_in_uhz)
+		max_refresh_in_uhz = nominal_field_rate_in_uhz;
+
+	/* Full range may be larger than current video timing, so cap at nominal */
+	if (min_refresh_in_uhz > max_refresh_in_uhz)
+		min_refresh_in_uhz = max_refresh_in_uhz;
+
+	/* If a monitor reports exactly max refresh of 2x of min, enforce it on nominal */
+	rounded_nominal_in_uhz =
+			div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000;
+	if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) &&
+		in_config->max_refresh_in_uhz == rounded_nominal_in_uhz)
+		min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2);
+
+	if (!vrr_settings_require_update(core_freesync,
+			in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz,
+			in_out_vrr))
+		return;
+
+	in_out_vrr->state = in_config->state;
+	in_out_vrr->send_info_frame = in_config->vsif_supported;
+
+	if (in_config->state == VRR_STATE_UNSUPPORTED) {
+		in_out_vrr->state = VRR_STATE_UNSUPPORTED;
+		in_out_vrr->supported = false;
+		in_out_vrr->adjust.v_total_min = stream->timing.v_total;
+		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
+
+		return;
+
+	} else {
+		in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz;
+		in_out_vrr->max_duration_in_us =
+				calc_duration_in_us_from_refresh_in_uhz(
+						(unsigned int)min_refresh_in_uhz);
+
+		in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz;
+		in_out_vrr->min_duration_in_us =
+				calc_duration_in_us_from_refresh_in_uhz(
+						(unsigned int)max_refresh_in_uhz);
+
+		if (in_config->state == VRR_STATE_ACTIVE_FIXED)
+			in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz;
+		else
+			in_out_vrr->fixed_refresh_in_uhz = 0;
+
+		refresh_range = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) -
++				div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000);
+
+		in_out_vrr->supported = true;
+	}
+
+	in_out_vrr->fixed.ramping_active = in_config->ramping;
+
+	in_out_vrr->btr.btr_enabled = in_config->btr;
+
+	if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz))
+		in_out_vrr->btr.btr_enabled = false;
+	else {
+		in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us -
+				2 * in_out_vrr->min_duration_in_us;
+		if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN)
+			in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN;
+	}
+
+	in_out_vrr->btr.btr_active = false;
+	in_out_vrr->btr.inserted_duration_in_us = 0;
+	in_out_vrr->btr.frames_to_insert = 0;
+	in_out_vrr->btr.frame_counter = 0;
+	in_out_vrr->fixed.fixed_active = false;
+	in_out_vrr->fixed.target_refresh_in_uhz = 0;
+
+	in_out_vrr->btr.mid_point_in_us =
+				(in_out_vrr->min_duration_in_us +
+				 in_out_vrr->max_duration_in_us) / 2;
+
+	if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) {
+		in_out_vrr->adjust.v_total_min = stream->timing.v_total;
+		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
+	} else if (in_out_vrr->state == VRR_STATE_DISABLED) {
+		in_out_vrr->adjust.v_total_min = stream->timing.v_total;
+		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
+	} else if (in_out_vrr->state == VRR_STATE_INACTIVE) {
+		in_out_vrr->adjust.v_total_min = stream->timing.v_total;
+		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
+	} else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
+			refresh_range >= MIN_REFRESH_RANGE) {
+
+		in_out_vrr->adjust.v_total_min =
+			mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->max_refresh_in_uhz);
+		in_out_vrr->adjust.v_total_max =
+			mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->min_refresh_in_uhz);
+	} else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) {
+		in_out_vrr->fixed.target_refresh_in_uhz =
+				in_out_vrr->fixed_refresh_in_uhz;
+		if (in_out_vrr->fixed.ramping_active &&
+				in_out_vrr->fixed.fixed_active) {
+			/* Do not update vtotals if ramping is already active
+			 * in order to continue ramp from current refresh.
+			 */
+			in_out_vrr->fixed.fixed_active = true;
+		} else {
+			in_out_vrr->fixed.fixed_active = true;
+			in_out_vrr->adjust.v_total_min =
+				mod_freesync_calc_v_total_from_refresh(stream,
+					in_out_vrr->fixed.target_refresh_in_uhz);
+			in_out_vrr->adjust.v_total_max =
+				in_out_vrr->adjust.v_total_min;
+		}
+	} else {
+		in_out_vrr->state = VRR_STATE_INACTIVE;
+		in_out_vrr->adjust.v_total_min = stream->timing.v_total;
+		in_out_vrr->adjust.v_total_max = stream->timing.v_total;
+	}
+}
+
+void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync,
+		const struct dc_plane_state *plane,
+		const struct dc_stream_state *stream,
+		unsigned int curr_time_stamp_in_us,
+		struct mod_vrr_params *in_out_vrr)
+{
+	struct core_freesync *core_freesync = NULL;
+	unsigned int last_render_time_in_us = 0;
+	unsigned int average_render_time_in_us = 0;
+
+	if (mod_freesync == NULL)
+		return;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+
+	if (in_out_vrr->supported &&
+			in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) {
+		unsigned int i = 0;
+		unsigned int oldest_index = plane->time.index + 1;
+
+		if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX)
+			oldest_index = 0;
+
+		last_render_time_in_us = curr_time_stamp_in_us -
+				plane->time.prev_update_time_in_us;
+
+		/* Sum off all entries except oldest one */
+		for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) {
+			average_render_time_in_us +=
+					plane->time.time_elapsed_in_us[i];
+		}
+		average_render_time_in_us -=
+				plane->time.time_elapsed_in_us[oldest_index];
+
+		/* Add render time for current flip */
+		average_render_time_in_us += last_render_time_in_us;
+		average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX;
+
+		if (in_out_vrr->btr.btr_enabled) {
+			apply_below_the_range(core_freesync,
+					stream,
+					last_render_time_in_us,
+					in_out_vrr);
+		} else {
+			apply_fixed_refresh(core_freesync,
+				stream,
+				last_render_time_in_us,
+				in_out_vrr);
+		}
+
+		determine_flip_interval_workaround_req(in_out_vrr,
+				curr_time_stamp_in_us);
+
+	}
+}
+
+void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
+		const struct dc_stream_state *stream,
+		struct mod_vrr_params *in_out_vrr)
+{
+	struct core_freesync *core_freesync = NULL;
+	unsigned int cur_timestamp_in_us;
+	unsigned long long cur_tick;
+
+	if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL))
+		return;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+
+	if (in_out_vrr->supported == false)
+		return;
+
+	cur_tick = dm_get_timestamp(core_freesync->dc->ctx);
+	cur_timestamp_in_us = (unsigned int)
+			div_u64(dm_get_elapse_time_in_ns(core_freesync->dc->ctx, cur_tick, 0), 1000);
+
+	in_out_vrr->flip_interval.vsyncs_between_flip++;
+	in_out_vrr->flip_interval.v_update_timestamp_in_us = cur_timestamp_in_us;
+
+	if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
+			(in_out_vrr->flip_interval.flip_interval_workaround_active ||
+			(!in_out_vrr->flip_interval.flip_interval_workaround_active &&
+			in_out_vrr->flip_interval.program_flip_interval_workaround))) {
+		// set freesync vmin vmax to nominal for workaround
+		in_out_vrr->adjust.v_total_min =
+			mod_freesync_calc_v_total_from_refresh(
+			stream, in_out_vrr->max_refresh_in_uhz);
+		in_out_vrr->adjust.v_total_max =
+				in_out_vrr->adjust.v_total_min;
+		in_out_vrr->flip_interval.program_flip_interval_workaround = false;
+		in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = true;
+		return;
+	}
+
+	if (in_out_vrr->state != VRR_STATE_ACTIVE_VARIABLE &&
+			in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup) {
+		in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = false;
+		in_out_vrr->flip_interval.flip_interval_detect_counter = 0;
+		in_out_vrr->flip_interval.vsyncs_between_flip = 0;
+		in_out_vrr->flip_interval.vsync_to_flip_in_us = 0;
+	}
+
+	/* Below the Range Logic */
+
+	/* Only execute if in fullscreen mode */
+	if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE &&
+					in_out_vrr->btr.btr_active) {
+		/* TODO: pass in flag for Pre-DCE12 ASIC
+		 * in order for frame variable duration to take affect,
+		 * it needs to be done one VSYNC early, which is at
+		 * frameCounter == 1.
+		 * For DCE12 and newer updates to V_TOTAL_MIN/MAX
+		 * will take affect on current frame
+		 */
+		if (in_out_vrr->btr.frames_to_insert ==
+				in_out_vrr->btr.frame_counter) {
+			in_out_vrr->adjust.v_total_min =
+				calc_v_total_from_duration(stream,
+				in_out_vrr,
+				in_out_vrr->btr.inserted_duration_in_us);
+			in_out_vrr->adjust.v_total_max =
+				in_out_vrr->adjust.v_total_min;
+		}
+
+		if (in_out_vrr->btr.frame_counter > 0)
+			in_out_vrr->btr.frame_counter--;
+
+		/* Restore FreeSync */
+		if (in_out_vrr->btr.frame_counter == 0) {
+			in_out_vrr->adjust.v_total_min =
+				mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->max_refresh_in_uhz);
+			in_out_vrr->adjust.v_total_max =
+				mod_freesync_calc_v_total_from_refresh(stream,
+				in_out_vrr->min_refresh_in_uhz);
+		}
+	}
+
+	/* If in fullscreen freesync mode or in video, do not program
+	 * static screen ramp values
+	 */
+	if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE)
+		in_out_vrr->fixed.ramping_active = false;
+
+	/* Gradual Static Screen Ramping Logic
+	 * Execute if ramp is active and user enabled freesync static screen
+	 */
+	if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED &&
+				in_out_vrr->fixed.ramping_active) {
+		update_v_total_for_static_ramp(
+				core_freesync, stream, in_out_vrr);
+	}
+}
+
+void mod_freesync_get_settings(struct mod_freesync *mod_freesync,
+		const struct mod_vrr_params *vrr,
+		unsigned int *v_total_min, unsigned int *v_total_max,
+		unsigned int *event_triggers,
+		unsigned int *window_min, unsigned int *window_max,
+		unsigned int *lfc_mid_point_in_us,
+		unsigned int *inserted_frames,
+		unsigned int *inserted_duration_in_us)
+{
+	if (mod_freesync == NULL)
+		return;
+
+	if (vrr->supported) {
+		*v_total_min = vrr->adjust.v_total_min;
+		*v_total_max = vrr->adjust.v_total_max;
+		*event_triggers = 0;
+		*lfc_mid_point_in_us = vrr->btr.mid_point_in_us;
+		*inserted_frames = vrr->btr.frames_to_insert;
+		*inserted_duration_in_us = vrr->btr.inserted_duration_in_us;
+	}
+}
+
+unsigned long long mod_freesync_calc_nominal_field_rate(
+			const struct dc_stream_state *stream)
+{
+	unsigned long long nominal_field_rate_in_uhz = 0;
+	unsigned int total = stream->timing.h_total * stream->timing.v_total;
+
+	/* Calculate nominal field rate for stream, rounded up to nearest integer */
+	nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz;
+	nominal_field_rate_in_uhz *= 100000000ULL;
+
+	nominal_field_rate_in_uhz =	div_u64(nominal_field_rate_in_uhz, total);
+
+	return nominal_field_rate_in_uhz;
+}
+
+unsigned long long mod_freesync_calc_field_rate_from_timing(
+		unsigned int vtotal, unsigned int htotal, unsigned int pix_clk)
+{
+	unsigned long long field_rate_in_uhz = 0;
+	unsigned int total = htotal * vtotal;
+
+	/* Calculate nominal field rate for stream, rounded up to nearest integer */
+	field_rate_in_uhz = pix_clk;
+	field_rate_in_uhz *= 1000000ULL;
+
+	field_rate_in_uhz =	div_u64(field_rate_in_uhz, total);
+
+	return field_rate_in_uhz;
+}
+
+bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr)
+{
+	return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED);
+}
+
+bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz,
+		uint32_t max_refresh_cap_in_uhz,
+		uint32_t nominal_field_rate_in_uhz)
+{
+
+	/* Typically nominal refresh calculated can have some fractional part.
+	 * Allow for some rounding error of actual video timing by taking floor
+	 * of caps and request. Round the nominal refresh rate.
+	 *
+	 * Dividing will convert everything to units in Hz although input
+	 * variable name is in uHz!
+	 *
+	 * Also note, this takes care of rounding error on the nominal refresh
+	 * so by rounding error we only expect it to be off by a small amount,
+	 * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx.
+	 *
+	 * Example 1. Caps    Min = 40 Hz, Max = 144 Hz
+	 *            Request Min = 40 Hz, Max = 144 Hz
+	 *                    Nominal = 143.5x Hz rounded to 144 Hz
+	 *            This function should allow this as valid request
+	 *
+	 * Example 2. Caps    Min = 40 Hz, Max = 144 Hz
+	 *            Request Min = 40 Hz, Max = 144 Hz
+	 *                    Nominal = 144.4x Hz rounded to 144 Hz
+	 *            This function should allow this as valid request
+	 *
+	 * Example 3. Caps    Min = 40 Hz, Max = 144 Hz
+	 *            Request Min = 40 Hz, Max = 144 Hz
+	 *                    Nominal = 120.xx Hz rounded to 120 Hz
+	 *            This function should return NOT valid since the requested
+	 *            max is greater than current timing's nominal
+	 *
+	 * Example 4. Caps    Min = 40 Hz, Max = 120 Hz
+	 *            Request Min = 40 Hz, Max = 120 Hz
+	 *                    Nominal = 144.xx Hz rounded to 144 Hz
+	 *            This function should return NOT valid since the nominal
+	 *            is greater than the capability's max refresh
+	 */
+	nominal_field_rate_in_uhz =
+			div_u64(nominal_field_rate_in_uhz + 500000, 1000000);
+	min_refresh_cap_in_uhz /= 1000000;
+	max_refresh_cap_in_uhz /= 1000000;
+
+	/* Check nominal is within range */
+	if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz ||
+		nominal_field_rate_in_uhz < min_refresh_cap_in_uhz)
+		return false;
+
+	/* If nominal is less than max, limit the max allowed refresh rate */
+	if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz)
+		max_refresh_cap_in_uhz = nominal_field_rate_in_uhz;
+
+	/* Check min is within range */
+	if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz)
+		return false;
+
+	/* For variable range, check for at least 10 Hz range */
+	if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10)
+		return false;
+
+	return true;
+}