drm/amd/display: FreeSync Auto Sweep Support

Implement core support to allow for FreeSync Auto Sweep to work
Signed-off-by: Eric Cook <Eric.Cook@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -175,6 +175,31 @@ static bool stream_adjust_vmin_vmax(struct dc *dc,
 	return ret;
 }
 
+static bool stream_get_crtc_position(struct dc *dc,
+		const struct dc_stream **stream, int num_streams,
+		unsigned int *v_pos, unsigned int *nom_v_pos)
+{
+	/* TODO: Support multiple streams */
+	struct core_dc *core_dc = DC_TO_CORE(dc);
+	struct core_stream *core_stream = DC_STREAM_TO_CORE(stream[0]);
+	int i = 0;
+	bool ret = false;
+	struct crtc_position position;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		struct pipe_ctx *pipe =
+				&core_dc->current_context->res_ctx.pipe_ctx[i];
+
+		if (pipe->stream == core_stream && pipe->stream_enc) {
+			core_dc->hwss.get_position(&pipe, 1, &position);
+
+			*v_pos = position.vertical_count;
+			*nom_v_pos = position.nominal_vcount;
+			ret = true;
+		}
+	}
+	return ret;
+}
 
 static bool set_gamut_remap(struct dc *dc,
 			const struct dc_stream **stream, int num_streams)
@@ -349,6 +374,9 @@ static void allocate_dc_stream_funcs(struct core_dc *core_dc)
 	core_dc->public.stream_funcs.set_static_screen_events =
 			set_static_screen_events;
 
+	core_dc->public.stream_funcs.get_crtc_position =
+			stream_get_crtc_position;
+
 	core_dc->public.stream_funcs.set_gamut_remap =
 			set_gamut_remap;
 

drivers/gpu/drm/amd/display/dc/core/dc_debug.c

@@ -287,6 +287,7 @@ void context_timing_trace(
 	struct core_dc *core_dc = DC_TO_CORE(dc);
 	struct dal_logger *logger =  core_dc->ctx->logger;
 	int h_pos[MAX_PIPES], v_pos[MAX_PIPES];
+	struct crtc_position position;
 
 	for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i];
@@ -294,7 +295,9 @@ void context_timing_trace(
 		if (pipe_ctx->stream == NULL)
 			continue;
 
-		pipe_ctx->tg->funcs->get_position(pipe_ctx->tg, &h_pos[i], &v_pos[i]);
+		pipe_ctx->tg->funcs->get_position(pipe_ctx->tg, &position);
+		h_pos[i] = position.horizontal_count;
+		v_pos[i] = position.vertical_count;
 	}
 	for (i = 0; i < core_dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i];

drivers/gpu/drm/amd/display/dc/dc.h

@@ -103,6 +103,12 @@ struct dc_stream_funcs {
 			int num_streams,
 			int vmin,
 			int vmax);
+	bool (*get_crtc_position)(struct dc *dc,
+			const struct dc_stream **stream,
+			int num_streams,
+			unsigned int *v_pos,
+			unsigned int *nom_v_pos);
+
 
 	void (*stream_update_scaling)(const struct dc *dc,
 			const struct dc_stream *dc_stream,

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -1362,6 +1362,18 @@ static void set_drr(struct pipe_ctx **pipe_ctx,
 	}
 }
 
+static void get_position(struct pipe_ctx **pipe_ctx,
+		int num_pipes,
+		struct crtc_position *position)
+{
+	int i = 0;
+
+	/* TODO: handle pipes > 1
+	 */
+	for (i = 0; i < num_pipes; i++)
+		pipe_ctx[i]->tg->funcs->get_position(pipe_ctx[i]->tg, position);
+}
+
 static void set_static_screen_control(struct pipe_ctx **pipe_ctx,
 		int num_pipes, const struct dc_static_screen_events *events)
 {
@@ -2486,6 +2498,7 @@ static const struct hw_sequencer_funcs dce110_funcs = {
 	.pipe_control_lock = dce_pipe_control_lock,
 	.set_bandwidth = dce110_set_bandwidth,
 	.set_drr = set_drr,
+	.get_position = get_position,
 	.set_static_screen_control = set_static_screen_control,
 	.reset_hw_ctx_wrap = reset_hw_ctx_wrap,
 	.prog_pixclk_crtc_otg = dce110_prog_pixclk_crtc_otg,

drivers/gpu/drm/amd/display/dc/dce110/dce110_timing_generator.c

@@ -518,34 +518,38 @@ uint32_t dce110_timing_generator_get_vblank_counter(struct timing_generator *tg)
 
 /**
  *****************************************************************************
- *  Function: dce110_get_crtc_positions
+ *  Function: dce110_timing_generator_get_position
  *
  *  @brief
  *     Returns CRTC vertical/horizontal counters
  *
- *  @param [out] v_position, h_position
+ *  @param [out] position
  *****************************************************************************
  */
-
-void dce110_timing_generator_get_crtc_positions(
-	struct timing_generator *tg,
-	int32_t *h_position,
-	int32_t *v_position)
+void dce110_timing_generator_get_position(struct timing_generator *tg,
+	struct crtc_position *position)
 {
 	uint32_t value;
 	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
 
 	value = dm_read_reg(tg->ctx, CRTC_REG(mmCRTC_STATUS_POSITION));
 
-	*h_position = get_reg_field_value(
+	position->horizontal_count = get_reg_field_value(
 			value,
 			CRTC_STATUS_POSITION,
 			CRTC_HORZ_COUNT);
 
-	*v_position = get_reg_field_value(
+	position->vertical_count = get_reg_field_value(
 			value,
 			CRTC_STATUS_POSITION,
 			CRTC_VERT_COUNT);
+
+	value = dm_read_reg(tg->ctx, CRTC_REG(mmCRTC_NOM_VERT_POSITION));
+
+	position->nominal_vcount = get_reg_field_value(
+			value,
+			CRTC_NOM_VERT_POSITION,
+			CRTC_VERT_COUNT_NOM);
 }
 
 /**
@@ -566,18 +570,23 @@ void dce110_timing_generator_get_crtc_scanoutpos(
 	uint32_t *v_position)
 {
 	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
+	struct crtc_position position;
 
-	uint32_t v_blank_start_end  = dm_read_reg(tg->ctx,
+	uint32_t value  = dm_read_reg(tg->ctx,
 			CRTC_REG(mmCRTC_V_BLANK_START_END));
 
-	*v_blank_start = get_reg_field_value(v_blank_start_end,
+	*v_blank_start = get_reg_field_value(value,
 					     CRTC_V_BLANK_START_END,
 					     CRTC_V_BLANK_START);
-	*v_blank_end = get_reg_field_value(v_blank_start_end,
+	*v_blank_end = get_reg_field_value(value,
 					   CRTC_V_BLANK_START_END,
 					   CRTC_V_BLANK_END);
 
-	dce110_timing_generator_get_crtc_positions(tg, h_position, v_position);
+	dce110_timing_generator_get_position(
+			tg, &position);
+
+	*h_position = position.horizontal_count;
+	*v_position = position.vertical_count;
 }
 
 /* TODO: is it safe to assume that mask/shift of Primary and Underlay
@@ -1344,15 +1353,13 @@ void dce110_timing_generator_tear_down_global_swap_lock(
  */
 bool dce110_timing_generator_is_counter_moving(struct timing_generator *tg)
 {
-	uint32_t h1 = 0;
-	uint32_t h2 = 0;
-	uint32_t v1 = 0;
-	uint32_t v2 = 0;
+	struct crtc_position position1, position2;
 
-	tg->funcs->get_position(tg, &h1, &v1);
-	tg->funcs->get_position(tg, &h2, &v2);
+	tg->funcs->get_position(tg, &position1);
+	tg->funcs->get_position(tg, &position2);
 
-	if (h1 == h2 && v1 == v2)
+	if (position1.horizontal_count == position2.horizontal_count &&
+		position1.vertical_count == position2.vertical_count)
 		return false;
 	else
 		return true;
@@ -1750,18 +1757,6 @@ void dce110_tg_set_overscan_color(struct timing_generator *tg,
 	dm_write_reg(ctx, addr, value);
 }
 
-void dce110_tg_get_position(struct timing_generator *tg,
-	struct crtc_position *position)
-{
-	int32_t h_position;
-	int32_t v_position;
-
-	dce110_timing_generator_get_crtc_positions(tg, &h_position, &v_position);
-
-	position->horizontal_count = (uint32_t)h_position;
-	position->vertical_count = (uint32_t)v_position;
-}
-
 void dce110_tg_program_timing(struct timing_generator *tg,
 	const struct dc_crtc_timing *timing,
 	bool use_vbios)
@@ -1895,7 +1890,7 @@ static const struct timing_generator_funcs dce110_tg_funcs = {
 		.enable_crtc = dce110_timing_generator_enable_crtc,
 		.disable_crtc = dce110_timing_generator_disable_crtc,
 		.is_counter_moving = dce110_timing_generator_is_counter_moving,
-		.get_position = dce110_timing_generator_get_crtc_positions,
+		.get_position = dce110_timing_generator_get_position,
 		.get_frame_count = dce110_timing_generator_get_vblank_counter,
 		.get_scanoutpos = dce110_timing_generator_get_crtc_scanoutpos,
 		.set_early_control = dce110_timing_generator_set_early_control,

drivers/gpu/drm/amd/display/dc/dce110/dce110_timing_generator.h

@@ -151,11 +151,9 @@ void dce110_timing_generator_set_early_control(
 uint32_t dce110_timing_generator_get_vblank_counter(
 		struct timing_generator *tg);
 
-/* Get current H and V position */
-void dce110_timing_generator_get_crtc_positions(
+void dce110_timing_generator_get_position(
 	struct timing_generator *tg,
-	int32_t *h_position,
-	int32_t *v_position);
+	struct crtc_position *position);
 
 /* return true if TG counter is moving. false if TG is stopped */
 bool dce110_timing_generator_is_counter_moving(struct timing_generator *tg);
@@ -251,9 +249,6 @@ void dce110_tg_program_blank_color(struct timing_generator *tg,
 void dce110_tg_set_overscan_color(struct timing_generator *tg,
 	const struct tg_color *overscan_color);
 
-void dce110_tg_get_position(struct timing_generator *tg,
-	struct crtc_position *position);
-
 void dce110_tg_program_timing(struct timing_generator *tg,
 	const struct dc_crtc_timing *timing,
 	bool use_vbios);

drivers/gpu/drm/amd/display/dc/dce110/dce110_timing_generator_v.c

@@ -570,24 +570,11 @@ static void dce110_timing_generator_v_set_early_control(
 	dm_write_reg(tg->ctx, address, regval);
 }
 
-static void dce110_timing_generator_v_get_crtc_positions(
-	struct timing_generator *tg,
-	int32_t *h_position,
-	int32_t *v_position)
+static void dce110_timing_generator_get_underlay_position(struct timing_generator *tg,
+	struct crtc_position *position)
 {
-	uint32_t value;
-
-	value = dm_read_reg(tg->ctx, mmCRTCV_STATUS_POSITION);
-
-	*h_position = get_reg_field_value(
-			value,
-			CRTCV_STATUS_POSITION,
-			CRTC_HORZ_COUNT);
-
-	*v_position = get_reg_field_value(
-			value,
-			CRTCV_STATUS_POSITION,
-			CRTC_VERT_COUNT);
+	//Should never hit this case
+	ASSERT(false);
 }
 
 static uint32_t dce110_timing_generator_v_get_vblank_counter(struct timing_generator *tg)
@@ -665,7 +652,7 @@ static const struct timing_generator_funcs dce110_tg_v_funcs = {
 		.enable_crtc = dce110_timing_generator_v_enable_crtc,
 		.disable_crtc = dce110_timing_generator_v_disable_crtc,
 		.is_counter_moving = dce110_timing_generator_v_is_counter_moving,
-		.get_position = dce110_timing_generator_v_get_crtc_positions,
+		.get_position = dce110_timing_generator_get_underlay_position,
 		.get_frame_count = dce110_timing_generator_v_get_vblank_counter,
 		.set_early_control = dce110_timing_generator_v_set_early_control,
 		.wait_for_state = dce110_timing_generator_v_wait_for_state,

drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c

@@ -180,10 +180,9 @@ uint32_t dce120_timing_generator_get_vblank_counter(
 }
 
 /* Get current H and V position */
-void dce120_timing_generator_get_crtc_positions(
+void dce120_timing_generator_get_crtc_position(
 	struct timing_generator *tg,
-	int32_t *h_position,
-	int32_t *v_position)
+	struct crtc_position *position)
 {
 	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
 	uint32_t value = dm_read_reg_soc15(
@@ -191,11 +190,19 @@ void dce120_timing_generator_get_crtc_positions(
 				mmCRTC0_CRTC_STATUS_POSITION,
 				tg110->offsets.crtc);
 
-	*h_position = get_reg_field_value(
-					value, CRTC0_CRTC_STATUS_POSITION, CRTC_HORZ_COUNT);
+	position->horizontal_count = get_reg_field_value(value,
+			CRTC0_CRTC_STATUS_POSITION, CRTC_HORZ_COUNT);
 
-	*v_position = get_reg_field_value(
-						value, CRTC0_CRTC_STATUS_POSITION, CRTC_VERT_COUNT);
+	position->vertical_count = get_reg_field_value(value,
+			CRTC0_CRTC_STATUS_POSITION, CRTC_VERT_COUNT);
+
+	value = dm_read_reg_soc15(
+				tg->ctx,
+				mmCRTC0_CRTC_NOM_VERT_POSITION,
+				tg110->offsets.crtc);
+
+	position->nominal_vcount = get_reg_field_value(value,
+			CRTC0_CRTC_NOM_VERT_POSITION, CRTC_VERT_COUNT_NOM);
 }
 
 /* wait until TG is in beginning of vertical blank region */
@@ -576,6 +583,49 @@ void dce120_timing_generator_set_drr(
 	}
 }
 
+/**
+ *****************************************************************************
+ *  Function: dce120_timing_generator_get_position
+ *
+ *  @brief
+ *     Returns CRTC vertical/horizontal counters
+ *
+ *  @param [out] position
+ *****************************************************************************
+ */
+void dce120_timing_generator_get_position(struct timing_generator *tg,
+	struct crtc_position *position)
+{
+	uint32_t value;
+	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
+
+	value = dm_read_reg_soc15(
+			tg->ctx,
+			mmCRTC0_CRTC_STATUS_POSITION,
+			tg110->offsets.crtc);
+
+	position->horizontal_count = get_reg_field_value(
+			value,
+			CRTC0_CRTC_STATUS_POSITION,
+			CRTC_HORZ_COUNT);
+
+	position->vertical_count = get_reg_field_value(
+			value,
+			CRTC0_CRTC_STATUS_POSITION,
+			CRTC_VERT_COUNT);
+
+	value = dm_read_reg_soc15(
+			tg->ctx,
+			mmCRTC0_CRTC_NOM_VERT_POSITION,
+			tg110->offsets.crtc);
+
+	position->nominal_vcount = get_reg_field_value(
+			value,
+			CRTC0_CRTC_NOM_VERT_POSITION,
+			CRTC_VERT_COUNT_NOM);
+}
+
+
 void dce120_timing_generator_get_crtc_scanoutpos(
 	struct timing_generator *tg,
 	uint32_t *v_blank_start,
@@ -584,6 +634,7 @@ void dce120_timing_generator_get_crtc_scanoutpos(
 	uint32_t *v_position)
 {
 	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
+	struct crtc_position position;
 
 	uint32_t v_blank_start_end = dm_read_reg_soc15(
 			tg->ctx,
@@ -597,7 +648,11 @@ void dce120_timing_generator_get_crtc_scanoutpos(
 					   CRTC0_CRTC_V_BLANK_START_END,
 					   CRTC_V_BLANK_END);
 
-	dce120_timing_generator_get_crtc_positions(tg, h_position, v_position);
+	dce120_timing_generator_get_crtc_position(
+			tg, &position);
+
+	*h_position = position.horizontal_count;
+	*v_position = position.vertical_count;
 }
 
 void dce120_timing_generator_enable_advanced_request(
@@ -1076,7 +1131,7 @@ static struct timing_generator_funcs dce120_tg_funcs = {
 		/* used by enable_timing_synchronization. Not need for FPGA */
 		.is_counter_moving = dce110_timing_generator_is_counter_moving,
 		/* never be called */
-		.get_position = dce120_timing_generator_get_crtc_positions,
+		.get_position = dce120_timing_generator_get_crtc_position,
 		.get_frame_count = dce120_timing_generator_get_vblank_counter,
 		.get_scanoutpos = dce120_timing_generator_get_crtc_scanoutpos,
 		.set_early_control = dce120_timing_generator_set_early_control,

drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c

@@ -121,7 +121,7 @@ static const struct timing_generator_funcs dce80_tg_funcs = {
 		.enable_crtc = dce110_timing_generator_enable_crtc,
 		.disable_crtc = dce110_timing_generator_disable_crtc,
 		.is_counter_moving = dce110_timing_generator_is_counter_moving,
-		.get_position = dce110_timing_generator_get_crtc_positions,
+		.get_position = dce110_timing_generator_get_position,
 		.get_frame_count = dce110_timing_generator_get_vblank_counter,
 		.get_scanoutpos = dce110_timing_generator_get_crtc_scanoutpos,
 		.set_early_control = dce110_timing_generator_set_early_control,

drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h

@@ -30,9 +30,9 @@ struct dc_bios;
 
 /* Contains CRTC vertical/horizontal pixel counters */
 struct crtc_position {
-	uint32_t vertical_count;
-	uint32_t horizontal_count;
-	uint32_t nominal_vcount;
+	int32_t vertical_count;
+	int32_t horizontal_count;
+	int32_t nominal_vcount;
 };
 
 struct dcp_gsl_params {
@@ -105,8 +105,8 @@ struct timing_generator_funcs {
 	bool (*disable_crtc)(struct timing_generator *tg);
 	bool (*is_counter_moving)(struct timing_generator *tg);
 	void (*get_position)(struct timing_generator *tg,
-								int32_t *h_position,
-								int32_t *v_position);
+				struct crtc_position *position);
+
 	uint32_t (*get_frame_count)(struct timing_generator *tg);
 	void (*get_scanoutpos)(
 		struct timing_generator *tg,

drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h

@@ -131,6 +131,9 @@ struct hw_sequencer_funcs {
 	void (*set_drr)(struct pipe_ctx **pipe_ctx, int num_pipes,
 			int vmin, int vmax);
 
+	void (*get_position)(struct pipe_ctx **pipe_ctx, int num_pipes,
+			struct crtc_position *position);
+
 	void (*set_static_screen_control)(struct pipe_ctx **pipe_ctx,
 			int num_pipes, const struct dc_static_screen_events *events);
 

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

@@ -76,6 +76,16 @@ struct fixed_refresh {
 	bool program_fixed_refresh;
 };
 
+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;
@@ -89,6 +99,7 @@ struct freesync_state {
 	struct gradual_static_ramp static_ramp;
 	struct below_the_range btr;
 	struct fixed_refresh fixed_refresh;
+	struct freesync_range freesync_range;
 };
 
 struct freesync_entity {
@@ -342,8 +353,11 @@ static void update_stream(struct core_freesync *core_freesync,
 	}
 }
 
-static void calc_vmin_vmax(struct core_freesync *core_freesync,
-		const struct dc_stream *stream, int *vmin, int *vmax)
+static void calc_freesync_range(struct core_freesync *core_freesync,
+		const struct dc_stream *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);
@@ -351,29 +365,50 @@ static void calc_vmin_vmax(struct core_freesync *core_freesync,
 
 	min_frame_duration_in_ns = ((unsigned int) (div64_u64(
 					(1000000000ULL * 1000000),
-					core_freesync->map[index].state.
-					nominal_refresh_rate_in_micro_hz)));
+					max_refresh_in_uhz)));
 	max_frame_duration_in_ns = ((unsigned int) (div64_u64(
-					(1000000000ULL * 1000000),
-					core_freesync->map[index].caps->min_refresh_in_micro_hz)));
+		(1000000000ULL * 1000000),
+		min_refresh_in_uhz)));
+
+	state->freesync_range.min_refresh = min_refresh_in_uhz;
+	state->freesync_range.max_refresh = max_refresh_in_uhz;
 
-	*vmax = div64_u64(div64_u64(((unsigned long long)(
-			max_frame_duration_in_ns) * stream->timing.pix_clk_khz),
-			stream->timing.h_total), 1000000);
-	*vmin = div64_u64(div64_u64(((unsigned long long)(
-			min_frame_duration_in_ns) * stream->timing.pix_clk_khz),
-			stream->timing.h_total), 1000000);
+	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);
 
 	/* In case of 4k free sync monitor, vmin or vmax cannot be less than vtotal */
-	if (*vmin < vtotal) {
+	if (state->freesync_range.vmin < vtotal) {
 		ASSERT(false);
-		*vmin = vtotal;
+		state->freesync_range.vmin = vtotal;
 	}
 
-	if (*vmax < vtotal) {
+	if (state->freesync_range.vmax < vtotal) {
 		ASSERT(false);
-		*vmax = 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;
 }
 
 static void calc_v_total_from_duration(const struct dc_stream *stream,
@@ -518,9 +553,8 @@ static bool set_freesync_on_streams(struct core_freesync *core_freesync,
 				state->fixed_refresh.fixed_refresh_active == false) {
 				/* Enable freesync */
 
-				calc_vmin_vmax(core_freesync,
-						streams[stream_idx],
-						&v_total_min, &v_total_max);
+				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,
@@ -696,7 +730,7 @@ void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
 					(1000000000ULL * 1000000),
 					state->nominal_refresh_rate_in_micro_hz)));
 
-			calc_vmin_vmax(core_freesync, *streams, &vmin, &vmax);
+			vmin = state->freesync_range.vmin;
 
 			inserted_frame_v_total = vmin;
 
@@ -941,11 +975,120 @@ bool mod_freesync_get_user_enable(struct mod_freesync *mod_freesync,
 	return true;
 }
 
+bool mod_freesync_override_min_max(struct mod_freesync *mod_freesync,
+		const struct dc_stream *streams,
+		unsigned int min_refresh,
+		unsigned int max_refresh)
+{
+	unsigned int index = 0;
+	struct core_freesync *core_freesync;
+	struct freesync_state *state;
+
+	if (mod_freesync == NULL)
+		return false;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+	index = map_index_from_stream(core_freesync, streams);
+	state = &core_freesync->map[index].state;
+
+	if (min_refresh == 0 || max_refresh == 0) {
+		/* Restore defaults */
+		calc_freesync_range(core_freesync, streams, state,
+			core_freesync->map[index].caps->
+			min_refresh_in_micro_hz,
+			state->nominal_refresh_rate_in_micro_hz);
+	} else {
+		calc_freesync_range(core_freesync, streams,
+				state,
+				min_refresh,
+				max_refresh);
+
+		/* Program vtotal min/max */
+		core_freesync->dc->stream_funcs.adjust_vmin_vmax(
+			core_freesync->dc, &streams, 1,
+			state->freesync_range.vmin,
+			state->freesync_range.vmax);
+	}
+
+	return true;
+}
+
+bool mod_freesync_get_min_max(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *min_refresh,
+		unsigned int *max_refresh)
+{
+	unsigned int index = 0;
+	struct core_freesync *core_freesync = NULL;
+
+	if (mod_freesync == NULL)
+		return false;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+	index = map_index_from_stream(core_freesync, stream);
+
+	*min_refresh =
+		core_freesync->map[index].state.freesync_range.min_refresh;
+	*max_refresh =
+		core_freesync->map[index].state.freesync_range.max_refresh;
+
+	return true;
+}
+
+bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *vmin,
+		unsigned int *vmax)
+{
+	unsigned int index = 0;
+	struct core_freesync *core_freesync = NULL;
+
+	if (mod_freesync == NULL)
+		return false;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+	index = map_index_from_stream(core_freesync, stream);
+
+	*vmin =
+		core_freesync->map[index].state.freesync_range.vmin;
+	*vmax =
+		core_freesync->map[index].state.freesync_range.vmax;
+
+	return true;
+}
+
+bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *nom_v_pos,
+		unsigned int *v_pos)
+{
+	unsigned int index = 0;
+	struct core_freesync *core_freesync = NULL;
+	struct crtc_position position;
+
+	if (mod_freesync == NULL)
+		return false;
+
+	core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync);
+	index = map_index_from_stream(core_freesync, stream);
+
+	if (core_freesync->dc->stream_funcs.get_crtc_position(
+			core_freesync->dc, &stream, 1,
+			&position.vertical_count, &position.nominal_vcount)) {
+
+		*nom_v_pos = position.vertical_count;
+		*v_pos = position.nominal_vcount;
+
+		return true;
+	}
+
+	return false;
+}
+
 void mod_freesync_notify_mode_change(struct mod_freesync *mod_freesync,
 		const struct dc_stream **streams, int num_streams)
 {
 	unsigned int stream_index, map_index;
-	unsigned min_frame_duration_in_ns, max_frame_duration_in_ns;
 	struct freesync_state *state;
 	struct core_freesync *core_freesync = NULL;
 
@@ -965,37 +1108,23 @@ void mod_freesync_notify_mode_change(struct mod_freesync *mod_freesync,
 			unsigned long long temp;
 			temp = streams[stream_index]->timing.pix_clk_khz;
 			temp *= 1000ULL * 1000ULL * 1000ULL;
-			temp = div_u64(temp, streams[stream_index]->timing.h_total);
-			temp = div_u64(temp, streams[stream_index]->timing.v_total);
-			state->nominal_refresh_rate_in_micro_hz = (unsigned int) temp;
+			temp = div_u64(temp,
+					streams[stream_index]->timing.h_total);
+			temp = div_u64(temp,
+					streams[stream_index]->timing.v_total);
+			state->nominal_refresh_rate_in_micro_hz =
+					(unsigned int) temp;
 
 			/* Update the stream */
 			update_stream(core_freesync, streams[stream_index]);
 
-			/* Determine whether BTR can be supported */
-			min_frame_duration_in_ns = ((unsigned int) (div64_u64(
-					(1000000000ULL * 1000000),
-					state->nominal_refresh_rate_in_micro_hz)));
-
-			max_frame_duration_in_ns = ((unsigned int) (div64_u64(
-					(1000000000ULL * 1000000),
-					core_freesync->map[map_index].caps->min_refresh_in_micro_hz)));
-
-			if (max_frame_duration_in_ns >=
-					2 * min_frame_duration_in_ns)
-				core_freesync->map[map_index].caps->btr_supported = true;
-			else
-				core_freesync->map[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;
-
+			/* Calculate vmin/vmax and refresh rate for
+			 * current mode
+			 */
+			calc_freesync_range(core_freesync, *streams, state,
+				core_freesync->map[stream_index].caps->
+				min_refresh_in_micro_hz,
+				state->nominal_refresh_rate_in_micro_hz);
 		}
 	}
 
@@ -1178,7 +1307,7 @@ static void apply_fixed_refresh(struct core_freesync *core_freesync,
 	/* Fixed Refresh set to "active" so engage (fix to max) */
 	} else {
 
-		calc_vmin_vmax(core_freesync, stream, &vmin, &vmax);
+		vmin = state->freesync_range.vmin;
 
 		vmax = vmin;
 

drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h

@@ -129,6 +129,26 @@ bool mod_freesync_get_user_enable(struct mod_freesync *mod_freesync,
 		const struct dc_stream *stream,
 		struct mod_freesync_user_enable *user_enable);
 
+bool mod_freesync_override_min_max(struct mod_freesync *mod_freesync,
+		const struct dc_stream *streams,
+		unsigned int min_refresh,
+		unsigned int max_refresh);
+
+bool mod_freesync_get_min_max(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *min_refresh,
+		unsigned int *max_refresh);
+
+bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *vmin,
+		unsigned int *vmax);
+
+bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync,
+		const struct dc_stream *stream,
+		unsigned int *nom_v_pos,
+		unsigned int *v_pos);
+
 void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
 		const struct dc_stream **streams, int num_streams);