drm/amd/display: Refactor FreeSync module

Remove dependency on internal sink map and instead
use existing stream and plane state

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 581 insertions, 1256 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index fa344ceafc17..5e12e463c06a 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -30,6 +30,7 @@
 
 #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS  32
 
+#define MIN_REFRESH_RANGE_IN_US 10000000
 /* 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 */
@@ -40,103 +41,9 @@
 #define FIXED_REFRESH_ENTER_FRAME_COUNT 5
 #define FIXED_REFRESH_EXIT_FRAME_COUNT 5
 
-#define FREESYNC_REGISTRY_NAME "freesync_v1"
-
-#define FREESYNC_NO_STATIC_FOR_EXTERNAL_DP_REGKEY "DalFreeSyncNoStaticForExternalDp"
-
-#define FREESYNC_NO_STATIC_FOR_INTERNAL_REGKEY "DalFreeSyncNoStaticForInternal"
-
-#define FREESYNC_DEFAULT_REGKEY "LCDFreeSyncDefault"
-
-struct gradual_static_ramp {
-	bool ramp_is_active;
-	bool ramp_direction_is_up;
-	unsigned int ramp_current_frame_duration_in_ns;
-};
-
-struct freesync_time {
-	/* video (48Hz feature) related */
-	unsigned int update_duration_in_ns;
-
-	/* BTR/fixed refresh related */
-	unsigned int prev_time_stamp_in_us;
-
-	unsigned int min_render_time_in_us;
-	unsigned int max_render_time_in_us;
-
-	unsigned int render_times_index;
-	unsigned int render_times[RENDER_TIMES_MAX_COUNT];
-
-	unsigned int min_window;
-	unsigned int max_window;
-};
-
-struct below_the_range {
-	bool btr_active;
-	bool program_btr;
-
-	unsigned int mid_point_in_us;
-
-	unsigned int inserted_frame_duration_in_us;
-	unsigned int frames_to_insert;
-	unsigned int frame_counter;
-};
-
-struct fixed_refresh {
-	bool fixed_active;
-	bool program_fixed;
-	unsigned int frame_counter;
-};
-
-struct freesync_range {
-	unsigned int min_refresh;
-	unsigned int max_frame_duration;
-	unsigned int vmax;
-
-	unsigned int max_refresh;
-	unsigned int min_frame_duration;
-	unsigned int vmin;
-};
-
-struct freesync_state {
-	bool fullscreen;
-	bool static_screen;
-	bool video;
-
-	unsigned int vmin;
-	unsigned int vmax;
-
-	struct freesync_time time;
-
-	unsigned int nominal_refresh_rate_in_micro_hz;
-	bool windowed_fullscreen;
-
-	struct gradual_static_ramp static_ramp;
-	struct below_the_range btr;
-	struct fixed_refresh fixed_refresh;
-	struct freesync_range freesync_range;
-};
-
-struct freesync_entity {
-	struct dc_stream_state *stream;
-	struct mod_freesync_caps *caps;
-	struct freesync_state state;
-	struct mod_freesync_user_enable user_enable;
-};
-
-struct freesync_registry_options {
-	bool drr_external_supported;
-	bool drr_internal_supported;
-	bool lcd_freesync_default_set;
-	int lcd_freesync_default_value;
-};
-
 struct core_freesync {
 	struct mod_freesync public;
 	struct dc *dc;
-	struct freesync_registry_options opts;
-	struct freesync_entity *map;
-	int num_entities;
 };
 
 #define MOD_FREESYNC_TO_CORE(mod_freesync)\
@@ -147,69 +54,16 @@ struct mod_freesync *mod_freesync_create(struct dc *dc)
 	struct core_freesync *core_freesync =
 			kzalloc(sizeof(struct core_freesync), GFP_KERNEL);
 
-
-	struct persistent_data_flag flag;
-
-	int i, data = 0;
-
 	if (core_freesync == NULL)
 		goto fail_alloc_context;
 
-	core_freesync->map = kcalloc(MOD_FREESYNC_MAX_CONCURRENT_STREAMS,
-					sizeof(struct freesync_entity),
-					GFP_KERNEL);
-
-	if (core_freesync->map == NULL)
-		goto fail_alloc_map;
-
-	for (i = 0; i < MOD_FREESYNC_MAX_CONCURRENT_STREAMS; i++)
-		core_freesync->map[i].stream = NULL;
-
-	core_freesync->num_entities = 0;
-
 	if (dc == NULL)
 		goto fail_construct;
 
 	core_freesync->dc = dc;
-
-	/* Create initial module folder in registry for freesync enable data */
-	flag.save_per_edid = true;
-	flag.save_per_link = false;
-	dm_write_persistent_data(dc->ctx, NULL, FREESYNC_REGISTRY_NAME,
-			NULL, NULL, 0, &flag);
-	flag.save_per_edid = false;
-	flag.save_per_link = false;
-
-	if (dm_read_persistent_data(dc->ctx, NULL, NULL,
-			FREESYNC_NO_STATIC_FOR_INTERNAL_REGKEY,
-			&data, sizeof(data), &flag)) {
-		core_freesync->opts.drr_internal_supported =
-			(data & 1) ? false : true;
-	}
-
-	if (dm_read_persistent_data(dc->ctx, NULL, NULL,
-			FREESYNC_NO_STATIC_FOR_EXTERNAL_DP_REGKEY,
-			&data, sizeof(data), &flag)) {
-		core_freesync->opts.drr_external_supported =
-				(data & 1) ? false : true;
-	}
-
-	if (dm_read_persistent_data(dc->ctx, NULL, NULL,
-			FREESYNC_DEFAULT_REGKEY,
-			&data, sizeof(data), &flag)) {
-		core_freesync->opts.lcd_freesync_default_set = true;
-		core_freesync->opts.lcd_freesync_default_value = data;
-	} else {
-		core_freesync->opts.lcd_freesync_default_set = false;
-		core_freesync->opts.lcd_freesync_default_value = 0;
-	}
-
 	return &core_freesync->public;
 
 fail_construct:
-	kfree(core_freesync->map);
-
-fail_alloc_map:
 	kfree(core_freesync);
 
 fail_alloc_context:
@@ -218,968 +72,396 @@ fail_alloc_context:
 
 void mod_freesync_destroy(struct mod_freesync *mod_freesync)
 {
-	if (mod_freesync != NULL) {
-		int i;
-		struct core_freesync *core_freesync =
-				MOD_FREESYNC_TO_CORE(mod_freesync);
-
-		for (i = 0; i < core_freesync->num_entities; i++)
-			if (core_freesync->map[i].stream)
-				dc_stream_release(core_freesync->map[i].stream);
-
-		kfree(core_freesync->map);
-
-		kfree(core_freesync);
-	}
-}
-
-/* Given a specific dc_stream* this function finds its equivalent
- * on the core_freesync->map and returns the corresponding index
- */
-static unsigned int map_index_from_stream(struct core_freesync *core_freesync,
-		struct dc_stream_state *stream)
-{
-	unsigned int index = 0;
-
-	for (index = 0; index < core_freesync->num_entities; index++) {
-		if (core_freesync->map[index].stream == stream) {
-			return index;
-		}
-	}
-	/* Could not find stream requested */
-	ASSERT(false);
-	return index;
-}
-
-bool mod_freesync_add_stream(struct mod_freesync *mod_freesync,
-		struct dc_stream_state *stream, struct mod_freesync_caps *caps)
-{
-	struct dc  *dc = NULL;
 	struct core_freesync *core_freesync = NULL;
-	int persistent_freesync_enable = 0;
-	struct persistent_data_flag flag;
-	unsigned int nom_refresh_rate_uhz;
-	unsigned long long temp;
-
 	if (mod_freesync == NULL)
-		return false;
-
+		return;
 	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
-	dc = core_freesync->dc;
-
-	flag.save_per_edid = true;
-	flag.save_per_link = false;
-
-	if (core_freesync->num_entities < MOD_FREESYNC_MAX_CONCURRENT_STREAMS) {
-
-		dc_stream_retain(stream);
-
-		temp = stream->timing.pix_clk_khz;
-		temp *= 1000ULL * 1000ULL * 1000ULL;
-		temp = div_u64(temp, stream->timing.h_total);
-		temp = div_u64(temp, stream->timing.v_total);
-
-		nom_refresh_rate_uhz = (unsigned int) temp;
-
-		core_freesync->map[core_freesync->num_entities].stream = stream;
-		core_freesync->map[core_freesync->num_entities].caps = caps;
-
-		core_freesync->map[core_freesync->num_entities].state.
-			fullscreen = false;
-		core_freesync->map[core_freesync->num_entities].state.
-			static_screen = false;
-		core_freesync->map[core_freesync->num_entities].state.
-			video = false;
-		core_freesync->map[core_freesync->num_entities].state.time.
-			update_duration_in_ns = 0;
-		core_freesync->map[core_freesync->num_entities].state.
-			static_ramp.ramp_is_active = false;
-
-		/* get persistent data from registry */
-		if (dm_read_persistent_data(dc->ctx, stream->sink,
-					FREESYNC_REGISTRY_NAME,
-					"userenable", &persistent_freesync_enable,
-					sizeof(int), &flag)) {
-			core_freesync->map[core_freesync->num_entities].user_enable.
-				enable_for_gaming =
-				(persistent_freesync_enable & 1) ? true : false;
-			core_freesync->map[core_freesync->num_entities].user_enable.
-				enable_for_static =
-				(persistent_freesync_enable & 2) ? true : false;
-			core_freesync->map[core_freesync->num_entities].user_enable.
-				enable_for_video =
-				(persistent_freesync_enable & 4) ? true : false;
-		/* If FreeSync display and LCDFreeSyncDefault is set, use as default values write back to userenable */
-		} else if (caps->supported && (core_freesync->opts.lcd_freesync_default_set)) {
-			core_freesync->map[core_freesync->num_entities].user_enable.enable_for_gaming =
-				(core_freesync->opts.lcd_freesync_default_value & 1) ? true : false;
-			core_freesync->map[core_freesync->num_entities].user_enable.enable_for_static =
-				(core_freesync->opts.lcd_freesync_default_value & 2) ? true : false;
-			core_freesync->map[core_freesync->num_entities].user_enable.enable_for_video =
-				(core_freesync->opts.lcd_freesync_default_value & 4) ? true : false;
-			dm_write_persistent_data(dc->ctx, stream->sink,
-						FREESYNC_REGISTRY_NAME,
-						"userenable", &core_freesync->opts.lcd_freesync_default_value,
-						sizeof(int), &flag);
-		} else {
-			core_freesync->map[core_freesync->num_entities].user_enable.
-					enable_for_gaming = false;
-			core_freesync->map[core_freesync->num_entities].user_enable.
-					enable_for_static = false;
-			core_freesync->map[core_freesync->num_entities].user_enable.
-					enable_for_video = false;
-		}
-
-		if (caps->supported &&
-			nom_refresh_rate_uhz >= caps->min_refresh_in_micro_hz &&
-			nom_refresh_rate_uhz <= caps->max_refresh_in_micro_hz)
-			stream->ignore_msa_timing_param = 1;
-
-		core_freesync->num_entities++;
-		return true;
-	}
-	return false;
+	kfree(core_freesync);
 }
 
-bool mod_freesync_remove_stream(struct mod_freesync *mod_freesync,
-		struct dc_stream_state *stream)
+#if 0 /* unused currently */
+static unsigned int calc_refresh_in_uhz_from_duration(
+		unsigned int duration_in_ns)
 {
-	int i = 0;
-	struct core_freesync *core_freesync = NULL;
-	unsigned int index = 0;
-
-	if (mod_freesync == NULL)
-		return false;
+	unsigned int refresh_in_uhz =
+			((unsigned int)(div64_u64((1000000000ULL * 1000000),
+					duration_in_ns)));
+	return refresh_in_uhz;
+}
+#endif
 
-	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
-	index = map_index_from_stream(core_freesync, stream);
-
-	dc_stream_release(core_freesync->map[index].stream);
-	core_freesync->map[index].stream = NULL;
-	/* To remove this entity, shift everything after down */
-	for (i = index; i < core_freesync->num_entities - 1; i++)
-		core_freesync->map[i] = core_freesync->map[i + 1];
-	core_freesync->num_entities--;
-	return true;
+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 void adjust_vmin_vmax(struct core_freesync *core_freesync,
-				struct dc_stream_state **streams,
-				int num_streams,
-				int map_index,
-				unsigned int v_total_min,
-				unsigned int v_total_max)
+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)
 {
-	if (num_streams == 0 || streams == NULL || num_streams > 1)
-		return;
+	unsigned int duration_in_us =
+			(unsigned int)(div64_u64(((unsigned long long)(v_total)
+				* 1000) * stream->timing.h_total,
+					stream->timing.pix_clk_khz));
 
-	core_freesync->map[map_index].state.vmin = v_total_min;
-	core_freesync->map[map_index].state.vmax = v_total_max;
+	if (duration_in_us < in_vrr->min_duration_in_us)
+		duration_in_us = in_vrr->min_duration_in_us;
 
-	dc_stream_adjust_vmin_vmax(core_freesync->dc, streams,
-				num_streams, v_total_min,
-				v_total_max);
-}
+	if (duration_in_us > in_vrr->max_duration_in_us)
+		duration_in_us = in_vrr->max_duration_in_us;
 
+	return duration_in_us;
+}
 
-static void update_stream_freesync_context(struct core_freesync *core_freesync,
-		struct dc_stream_state *stream)
+static unsigned int calc_v_total_from_refresh(
+		const struct dc_stream_state *stream,
+		unsigned int refresh_in_uhz)
 {
-	unsigned int index;
-	struct freesync_context *ctx;
+	unsigned int v_total = stream->timing.v_total;
+	unsigned int frame_duration_in_ns;
 
-	ctx = &stream->freesync_ctx;
+	frame_duration_in_ns =
+			((unsigned int)(div64_u64((1000000000ULL * 1000000),
+					refresh_in_uhz)));
 
-	index = map_index_from_stream(core_freesync, stream);
+	v_total = div64_u64(div64_u64(((unsigned long long)(
+			frame_duration_in_ns) * stream->timing.pix_clk_khz),
+			stream->timing.h_total), 1000000);
 
-	ctx->supported = core_freesync->map[index].caps->supported;
-	ctx->enabled = (core_freesync->map[index].user_enable.enable_for_gaming ||
-		core_freesync->map[index].user_enable.enable_for_video ||
-		core_freesync->map[index].user_enable.enable_for_static);
-	ctx->active = (core_freesync->map[index].state.fullscreen ||
-		core_freesync->map[index].state.video ||
-		core_freesync->map[index].state.static_ramp.ramp_is_active);
-	ctx->min_refresh_in_micro_hz =
-			core_freesync->map[index].caps->min_refresh_in_micro_hz;
-	ctx->nominal_refresh_in_micro_hz = core_freesync->
-		map[index].state.nominal_refresh_rate_in_micro_hz;
+	/* 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_stream(struct core_freesync *core_freesync,
-		struct dc_stream_state *stream)
+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 index = map_index_from_stream(core_freesync, stream);
-	if (core_freesync->map[index].caps->supported) {
-		stream->ignore_msa_timing_param = 1;
-		update_stream_freesync_context(core_freesync, stream);
-	}
-}
+	unsigned int v_total = 0;
 
-static void calc_freesync_range(struct core_freesync *core_freesync,
-		struct dc_stream_state *stream,
-		struct freesync_state *state,
-		unsigned int min_refresh_in_uhz,
-		unsigned int max_refresh_in_uhz)
-{
-	unsigned int min_frame_duration_in_ns = 0, max_frame_duration_in_ns = 0;
-	unsigned int index = map_index_from_stream(core_freesync, stream);
-	uint32_t vtotal = stream->timing.v_total;
-
-	if ((min_refresh_in_uhz == 0) || (max_refresh_in_uhz == 0)) {
-		state->freesync_range.min_refresh =
-				state->nominal_refresh_rate_in_micro_hz;
-		state->freesync_range.max_refresh =
-				state->nominal_refresh_rate_in_micro_hz;
+	if (duration_in_us < vrr->min_duration_in_us)
+		duration_in_us = vrr->min_duration_in_us;
 
-		state->freesync_range.max_frame_duration = 0;
-		state->freesync_range.min_frame_duration = 0;
+	if (duration_in_us > vrr->max_duration_in_us)
+		duration_in_us = vrr->max_duration_in_us;
 
-		state->freesync_range.vmax = vtotal;
-		state->freesync_range.vmin = vtotal;
-
-		return;
-	}
+	v_total = div64_u64(div64_u64(((unsigned long long)(
+				duration_in_us) * stream->timing.pix_clk_khz),
+				stream->timing.h_total), 1000);
 
-	min_frame_duration_in_ns = ((unsigned int) (div64_u64(
-					(1000000000ULL * 1000000),
-					max_refresh_in_uhz)));
-	max_frame_duration_in_ns = ((unsigned int) (div64_u64(
-		(1000000000ULL * 1000000),
-		min_refresh_in_uhz)));
-
-	state->freesync_range.min_refresh = min_refresh_in_uhz;
-	state->freesync_range.max_refresh = max_refresh_in_uhz;
-
-	state->freesync_range.max_frame_duration = max_frame_duration_in_ns;
-	state->freesync_range.min_frame_duration = min_frame_duration_in_ns;
-
-	state->freesync_range.vmax = div64_u64(div64_u64(((unsigned long long)(
-		max_frame_duration_in_ns) * stream->timing.pix_clk_khz),
-		stream->timing.h_total), 1000000);
-	state->freesync_range.vmin = div64_u64(div64_u64(((unsigned long long)(
-		min_frame_duration_in_ns) * stream->timing.pix_clk_khz),
-		stream->timing.h_total), 1000000);
-
-	/* vmin/vmax cannot be less than vtotal */
-	if (state->freesync_range.vmin < vtotal) {
-		/* Error of 1 is permissible */
-		ASSERT((state->freesync_range.vmin + 1) >= vtotal);
-		state->freesync_range.vmin = vtotal;
+	/* 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;
 	}
 
-	if (state->freesync_range.vmax < vtotal) {
-		/* Error of 1 is permissible */
-		ASSERT((state->freesync_range.vmax + 1) >= vtotal);
-		state->freesync_range.vmax = vtotal;
-	}
-
-	/* Determine whether BTR can be supported */
-	if (max_frame_duration_in_ns >=
-			2 * min_frame_duration_in_ns)
-		core_freesync->map[index].caps->btr_supported = true;
-	else
-		core_freesync->map[index].caps->btr_supported = false;
-
-	/* Cache the time variables */
-	state->time.max_render_time_in_us =
-		max_frame_duration_in_ns / 1000;
-	state->time.min_render_time_in_us =
-		min_frame_duration_in_ns / 1000;
-	state->btr.mid_point_in_us =
-		(max_frame_duration_in_ns +
-		min_frame_duration_in_ns) / 2000;
+	return v_total;
 }
 
-static void calc_v_total_from_duration(struct dc_stream_state *stream,
-		unsigned int duration_in_ns, int *v_total_nominal)
+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)
 {
-	*v_total_nominal = div64_u64(div64_u64(((unsigned long long)(
-				duration_in_ns) * stream->timing.pix_clk_khz),
-				stream->timing.h_total), 1000000);
-}
-
-static void calc_v_total_for_static_ramp(struct core_freesync *core_freesync,
-		struct dc_stream_state *stream,
-		unsigned int index, int *v_total)
-{
-	unsigned int frame_duration = 0;
-
-	struct gradual_static_ramp *static_ramp_variables =
-				&core_freesync->map[index].state.static_ramp;
+	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;
 
 	/* Calc 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) *
-		static_ramp_variables->ramp_current_frame_duration_in_ns),
-		1000000000)));
+		current_duration_in_us),
+		1000000)));
 
-	/* Calculate delta between new and current frame duration in ns */
+	/* Calculate delta between new and current frame duration in us */
 	unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
-		static_ramp_variables->ramp_current_frame_duration_in_ns) *
+		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) * static_ramp_variables->
-		ramp_current_frame_duration_in_ns), 16666666);
+		frame_duration_delta) * current_duration_in_us), 16666);
 
 	/* Going to a higher refresh rate (lower frame duration) */
-	if (static_ramp_variables->ramp_direction_is_up) {
+	if (ramp_direction_is_up) {
 		/* reduce frame duration */
-		static_ramp_variables->ramp_current_frame_duration_in_ns -=
-			ramp_rate_interpolated;
-
-		/* min frame duration */
-		frame_duration = ((unsigned int) (div64_u64(
-			(1000000000ULL * 1000000),
-			core_freesync->map[index].state.
-			nominal_refresh_rate_in_micro_hz)));
+		current_duration_in_us -= ramp_rate_interpolated;
 
 		/* adjust for frame duration below min */
-		if (static_ramp_variables->ramp_current_frame_duration_in_ns <=
-			frame_duration) {
-
-			static_ramp_variables->ramp_is_active = false;
-			static_ramp_variables->
-				ramp_current_frame_duration_in_ns =
-				frame_duration;
+		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 */
-		static_ramp_variables->ramp_current_frame_duration_in_ns +=
-			ramp_rate_interpolated;
-
-		/* max frame duration */
-		frame_duration = ((unsigned int) (div64_u64(
-			(1000000000ULL * 1000000),
-			core_freesync->map[index].caps->min_refresh_in_micro_hz)));
+		current_duration_in_us += ramp_rate_interpolated;
 
 		/* adjust for frame duration above max */
-		if (static_ramp_variables->ramp_current_frame_duration_in_ns >=
-			frame_duration) {
-
-			static_ramp_variables->ramp_is_active = false;
-			static_ramp_variables->
-				ramp_current_frame_duration_in_ns =
-				frame_duration;
+		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);
 		}
 	}
 
-	calc_v_total_from_duration(stream, static_ramp_variables->
-		ramp_current_frame_duration_in_ns, v_total);
-}
-
-static void reset_freesync_state_variables(struct freesync_state* state)
-{
-	state->static_ramp.ramp_is_active = false;
-	if (state->nominal_refresh_rate_in_micro_hz)
-		state->static_ramp.ramp_current_frame_duration_in_ns =
-			((unsigned int) (div64_u64(
-			(1000000000ULL * 1000000),
-			state->nominal_refresh_rate_in_micro_hz)));
-
-	state->btr.btr_active = false;
-	state->btr.frame_counter = 0;
-	state->btr.frames_to_insert = 0;
-	state->btr.inserted_frame_duration_in_us = 0;
-	state->btr.program_btr = false;
-
-	state->fixed_refresh.fixed_active = false;
-	state->fixed_refresh.program_fixed = false;
-}
-/*
- * Sets freesync mode on a stream depending on current freesync state.
- */
-static bool set_freesync_on_streams(struct core_freesync *core_freesync,
-		struct dc_stream_state **streams, int num_streams)
-{
-	int v_total_nominal = 0, v_total_min = 0, v_total_max = 0;
-	unsigned int stream_idx, map_index = 0;
-	struct freesync_state *state;
+	v_total = calc_v_total_from_duration(stream,
+			in_out_vrr,
+			current_duration_in_us);
 
-	if (num_streams == 0 || streams == NULL || num_streams > 1)
-		return false;
 
-	for (stream_idx = 0; stream_idx < num_streams; stream_idx++) {
-
-		map_index = map_index_from_stream(core_freesync,
-				streams[stream_idx]);
-
-		state = &core_freesync->map[map_index].state;
-
-		if (core_freesync->map[map_index].caps->supported) {
-
-			/* Fullscreen has the topmost priority. If the
-			 * fullscreen bit is set, we are in a fullscreen
-			 * application where it should not matter if it is
-			 * static screen. We should not check the static_screen
-			 * or video bit.
-			 *
-			 * Special cases of fullscreen include btr and fixed
-			 * refresh. We program btr on every flip and involves
-			 * programming full range right before the last inserted frame.
-			 * However, we do not want to program the full freesync range
-			 * when fixed refresh is active, because we only program
-			 * that logic once and this will override it.
-			 */
-			if (core_freesync->map[map_index].user_enable.
-				enable_for_gaming == true &&
-				state->fullscreen == true &&
-				state->fixed_refresh.fixed_active == false) {
-				/* Enable freesync */
-
-				v_total_min = state->freesync_range.vmin;
-				v_total_max = state->freesync_range.vmax;
-
-				/* Update the freesync context for the stream */
-				update_stream_freesync_context(core_freesync,
-						streams[stream_idx]);
-
-				adjust_vmin_vmax(core_freesync, streams,
-						num_streams, map_index,
-						v_total_min,
-						v_total_max);
-
-				return true;
-
-			} else if (core_freesync->map[map_index].user_enable.
-				enable_for_video && state->video == true) {
-				/* Enable 48Hz feature */
-
-				calc_v_total_from_duration(streams[stream_idx],
-					state->time.update_duration_in_ns,
-					&v_total_nominal);
-
-				/* Program only if v_total_nominal is in range*/
-				if (v_total_nominal >=
-					streams[stream_idx]->timing.v_total) {
-
-					/* Update the freesync context for
-					 * the stream
-					 */
-					update_stream_freesync_context(
-						core_freesync,
-						streams[stream_idx]);
-
-					adjust_vmin_vmax(
-						core_freesync, streams,
-						num_streams, map_index,
-						v_total_nominal,
-						v_total_nominal);
-				}
-				return true;
-
-			} else {
-				/* Disable freesync */
-				v_total_nominal = streams[stream_idx]->
-					timing.v_total;
-
-				/* Update the freesync context for
-				 * the stream
-				 */
-				update_stream_freesync_context(
-					core_freesync,
-					streams[stream_idx]);
-
-				adjust_vmin_vmax(core_freesync, streams,
-						num_streams, map_index,
-						v_total_nominal,
-						v_total_nominal);
-
-				/* Reset the cached variables */
-				reset_freesync_state_variables(state);
-
-				return true;
-			}
-		} else {
-			/* Disable freesync */
-			v_total_nominal = streams[stream_idx]->
-				timing.v_total;
-			/*
-			 * we have to reset drr always even sink does
-			 * not support freesync because a former stream has
-			 * be programmed
-			 */
-			adjust_vmin_vmax(core_freesync, streams,
-						num_streams, map_index,
-						v_total_nominal,
-						v_total_nominal);
-			/* Reset the cached variables */
-			reset_freesync_state_variables(state);
-		}
-
-	}
-
-	return false;
+	in_out_vrr->adjust.v_total_min = v_total;
+	in_out_vrr->adjust.v_total_max = v_total;
 }
 
-static void set_static_ramp_variables(struct core_freesync *core_freesync,
-		unsigned int index, bool enable_static_screen)
-{
-	unsigned int frame_duration = 0;
-	unsigned int nominal_refresh_rate = core_freesync->map[index].state.
-			nominal_refresh_rate_in_micro_hz;
-	unsigned int min_refresh_rate= core_freesync->map[index].caps->
-			min_refresh_in_micro_hz;
-	struct gradual_static_ramp *static_ramp_variables =
-			&core_freesync->map[index].state.static_ramp;
-
-	/* If we are ENABLING static screen, refresh rate should go DOWN.
-	 * If we are DISABLING static screen, refresh rate should go UP.
-	 */
-	if (enable_static_screen)
-		static_ramp_variables->ramp_direction_is_up = false;
-	else
-		static_ramp_variables->ramp_direction_is_up = true;
-
-	/* If ramp is not active, set initial frame duration depending on
-	 * whether we are enabling/disabling static screen mode. If the ramp is
-	 * already active, ramp should continue in the opposite direction
-	 * starting with the current frame duration
-	 */
-	if (!static_ramp_variables->ramp_is_active) {
-		if (enable_static_screen == true) {
-			/* Going to lower refresh rate, so start from max
-			 * refresh rate (min frame duration)
-			 */
-			frame_duration = ((unsigned int) (div64_u64(
-				(1000000000ULL * 1000000),
-				nominal_refresh_rate)));
-		} else {
-			/* Going to higher refresh rate, so start from min
-			 * refresh rate (max frame duration)
-			 */
-			frame_duration = ((unsigned int) (div64_u64(
-				(1000000000ULL * 1000000),
-				min_refresh_rate)));
-		}
-		static_ramp_variables->
-			ramp_current_frame_duration_in_ns = frame_duration;
-
-		static_ramp_variables->ramp_is_active = true;
-	}
-}
-
-void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
-		struct dc_stream_state **streams, int num_streams)
+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 index, v_total, inserted_frame_v_total = 0;
-	unsigned int min_frame_duration_in_ns, vmax, vmin = 0;
-	struct freesync_state *state;
-	struct core_freesync *core_freesync = NULL;
-	struct dc_static_screen_events triggers = {0};
-
-	if (mod_freesync == NULL)
-		return;
-
-	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
-
-	if (core_freesync->num_entities == 0)
-		return;
-
-	index = map_index_from_stream(core_freesync,
-		streams[0]);
-
-	if (core_freesync->map[index].caps->supported == false)
-		return;
-
-	state = &core_freesync->map[index].state;
-
-	/* Below the Range Logic */
-
-	/* Only execute if in fullscreen mode */
-	if (state->fullscreen == true &&
-		core_freesync->map[index].user_enable.enable_for_gaming &&
-		core_freesync->map[index].caps->btr_supported &&
-		state->btr.btr_active) {
+	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 min_frame_duration_in_ns = 0;
+	unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us;
 
-		/* 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 (state->btr.frames_to_insert == state->btr.frame_counter) {
+	min_frame_duration_in_ns = ((unsigned int) (div64_u64(
+		(1000000000ULL * 1000000),
+		in_out_vrr->max_refresh_in_uhz)));
 
-			min_frame_duration_in_ns = ((unsigned int) (div64_u64(
-					(1000000000ULL * 1000000),
-					state->nominal_refresh_rate_in_micro_hz)));
+	/* Program BTR */
+	if (last_render_time_in_us + BTR_EXIT_MARGIN < 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;
 
-			vmin = state->freesync_range.vmin;
+		/* Exit Fixed Refresh mode */
+		} else if (in_out_vrr->fixed.fixed_active) {
 
-			inserted_frame_v_total = vmin;
+			in_out_vrr->fixed.frame_counter++;
 
-			if (min_frame_duration_in_ns / 1000)
-				inserted_frame_v_total =
-					state->btr.inserted_frame_duration_in_us *
-					vmin / (min_frame_duration_in_ns / 1000);
+			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;
+			}
+		}
+	} else if (last_render_time_in_us > max_render_time_in_us) {
+		/* Enter Below the Range */
+		if (!in_out_vrr->btr.btr_active &&
+				in_out_vrr->btr.btr_enabled) {
+			in_out_vrr->btr.btr_active = true;
 
-			/* Set length of inserted frames as v_total_max*/
-			vmax = inserted_frame_v_total;
-			vmin = inserted_frame_v_total;
+		/* Enter Fixed Refresh mode */
+		} else if (!in_out_vrr->fixed.fixed_active &&
+				!in_out_vrr->btr.btr_enabled) {
+			in_out_vrr->fixed.frame_counter++;
 
-			/* Program V_TOTAL */
-			adjust_vmin_vmax(core_freesync, streams,
-						num_streams, index,
-						vmin, vmax);
+			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;
+			}
 		}
+	}
 
-		if (state->btr.frame_counter > 0)
-			state->btr.frame_counter--;
+	/* BTR set to "not active" so disengage */
+	if (!in_out_vrr->btr.btr_active) {
+		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;
 
 		/* Restore FreeSync */
-		if (state->btr.frame_counter == 0)
-			set_freesync_on_streams(core_freesync, streams, num_streams);
-	}
-
-	/* If in fullscreen freesync mode or in video, do not program
-	 * static screen ramp values
-	 */
-	if (state->fullscreen == true || state->video == true) {
+		in_out_vrr->adjust.v_total_min =
+			calc_v_total_from_refresh(stream,
+				in_out_vrr->max_refresh_in_uhz);
+		in_out_vrr->adjust.v_total_max =
+			calc_v_total_from_refresh(stream,
+				in_out_vrr->min_refresh_in_uhz);
+	/* BTR set to "active" so engage */
+	} else {
 
-		state->static_ramp.ramp_is_active = false;
+		/* 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;
 
-		return;
-	}
+		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);
+		}
 
-	/* Gradual Static Screen Ramping Logic */
+		/* Calculate number of midPoint frames that could fit within