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authorHarry Wentland <harry.wentland@amd.com>2017-09-12 15:58:20 -0400
committerAlex Deucher <alexander.deucher@amd.com>2017-09-26 17:01:32 -0400
commit4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c (patch)
tree84301c04dcaaa05c3318a8fe62cf62ab52ecc162 /drivers/gpu/drm/amd/display/modules/freesync/freesync.c
parent9c5b2b0d409304c2e3c1f4d1c9bb4958e1d46f8f (diff)
downloadlwn-4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c.tar.gz
lwn-4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c.zip
drm/amd/dc: Add dc display driver (v2)
Supported DCE versions: 8.0, 10.0, 11.0, 11.2 v2: rebase against 4.11 Signed-off-by: Harry Wentland <harry.wentland@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
-rw-r--r--drivers/gpu/drm/amd/display/modules/freesync/freesync.c1158
1 files changed, 1158 insertions, 0 deletions
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 000000000000..eb912baa0169
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -0,0 +1,1158 @@
+/*
+ * 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"
+#include "core_dc.h"
+
+#define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 32
+
+/* 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 20
+/* Threshold to exit BTR (to avoid frequent enter-exits at the lower limit) */
+#define BTR_EXIT_MARGIN 2000
+
+#define FREESYNC_REGISTRY_NAME "freesync_v1"
+
+struct gradual_static_ramp {
+ bool ramp_is_active;
+ bool ramp_direction_is_up;
+ unsigned int ramp_current_frame_duration_in_ns;
+};
+
+struct time_cache {
+ /* 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];
+};
+
+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_refresh_active;
+ bool program_fixed_refresh;
+};
+
+struct freesync_state {
+ bool fullscreen;
+ bool static_screen;
+ bool video;
+
+ unsigned int nominal_refresh_rate_in_micro_hz;
+ bool windowed_fullscreen;
+
+ struct time_cache time;
+
+ struct gradual_static_ramp static_ramp;
+ struct below_the_range btr;
+ struct fixed_refresh fixed_refresh;
+};
+
+struct freesync_entity {
+ const struct dc_stream *stream;
+ struct mod_freesync_caps *caps;
+ struct freesync_state state;
+ struct mod_freesync_user_enable user_enable;
+};
+
+struct core_freesync {
+ struct mod_freesync public;
+ struct dc *dc;
+ struct freesync_entity *map;
+ int num_entities;
+};
+
+#define MOD_FREESYNC_TO_CORE(mod_freesync)\
+ container_of(mod_freesync, struct core_freesync, public)
+
+static bool check_dc_support(const struct dc *dc)
+{
+ if (dc->stream_funcs.adjust_vmin_vmax == NULL)
+ return false;
+
+ return true;
+}
+
+struct mod_freesync *mod_freesync_create(struct dc *dc)
+{
+ struct core_freesync *core_freesync =
+ dm_alloc(sizeof(struct core_freesync));
+
+ struct core_dc *core_dc = DC_TO_CORE(dc);
+
+ struct persistent_data_flag flag;
+
+ int i = 0;
+
+ if (core_freesync == NULL)
+ goto fail_alloc_context;
+
+ core_freesync->map = dm_alloc(sizeof(struct freesync_entity) *
+ MOD_FREESYNC_MAX_CONCURRENT_STREAMS);
+
+ 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;
+
+ if (!check_dc_support(dc))
+ goto fail_construct;
+
+ /* Create initial module folder in registry for freesync enable data */
+ flag.save_per_edid = true;
+ flag.save_per_link = false;
+ dm_write_persistent_data(core_dc->ctx, NULL, FREESYNC_REGISTRY_NAME, NULL, NULL,
+ 0, &flag);
+
+ return &core_freesync->public;
+
+fail_construct:
+ dm_free(core_freesync->map);
+
+fail_alloc_map:
+ dm_free(core_freesync);
+
+fail_alloc_context:
+ return NULL;
+}
+
+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);
+
+ dm_free(core_freesync->map);
+
+ dm_free(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,
+ const struct dc_stream *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,
+ const struct dc_stream *stream, struct mod_freesync_caps *caps)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+ struct core_stream *core_stream =
+ DC_STREAM_TO_CORE(stream);
+ struct core_dc *core_dc = DC_TO_CORE(core_freesync->dc);
+
+ int persistent_freesync_enable = 0;
+ struct persistent_data_flag flag;
+
+ flag.save_per_edid = true;
+ flag.save_per_link = false;
+
+ if (core_freesync->num_entities < MOD_FREESYNC_MAX_CONCURRENT_STREAMS) {
+
+ dc_stream_retain(stream);
+
+ 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(core_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;
+ } 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)
+ core_stream->public.ignore_msa_timing_param = 1;
+
+ core_freesync->num_entities++;
+ return true;
+ }
+ return false;
+}
+
+bool mod_freesync_remove_stream(struct mod_freesync *mod_freesync,
+ const struct dc_stream *stream)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ int i = 0;
+ unsigned int 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 void update_stream_freesync_context(struct core_freesync *core_freesync,
+ const struct dc_stream *stream)
+{
+ unsigned int index;
+ struct freesync_context *ctx;
+ struct core_stream *core_stream;
+
+ core_stream = DC_STREAM_TO_CORE(stream);
+ ctx = &core_stream->public.freesync_ctx;
+
+ index = map_index_from_stream(core_freesync, stream);
+
+ 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;
+
+}
+
+static void update_stream(struct core_freesync *core_freesync,
+ const struct dc_stream *stream)
+{
+ struct core_stream *core_stream = DC_STREAM_TO_CORE(stream);
+
+ unsigned int index = map_index_from_stream(core_freesync, stream);
+ if (core_freesync->map[index].caps->supported) {
+ core_stream->public.ignore_msa_timing_param = 1;
+ update_stream_freesync_context(core_freesync, stream);
+ }
+}
+
+static void calc_vmin_vmax(struct core_freesync *core_freesync,
+ const struct dc_stream *stream, int *vmin, int *vmax)
+{
+ unsigned int min_frame_duration_in_ns = 0, max_frame_duration_in_ns = 0;
+ unsigned int index = map_index_from_stream(core_freesync, stream);
+
+ min_frame_duration_in_ns = ((unsigned int) (div64_u64(
+ (1000000000ULL * 1000000),
+ core_freesync->map[index].state.
+ nominal_refresh_rate_in_micro_hz)));
+ max_frame_duration_in_ns = ((unsigned int) (div64_u64(
+ (1000000000ULL * 1000000),
+ core_freesync->map[index].caps->min_refresh_in_micro_hz)));
+
+ *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);
+}
+
+static void calc_v_total_from_duration(const struct dc_stream *stream,
+ unsigned int duration_in_ns, int *v_total_nominal)
+{
+ *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,
+ const struct dc_stream *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;
+
+ /* 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)));
+
+ /* Calculate delta between new and current frame duration in ns */
+ unsigned int frame_duration_delta = div64_u64(((unsigned long long)(
+ static_ramp_variables->ramp_current_frame_duration_in_ns) *
+ (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);
+
+ /* Going to a higher refresh rate (lower frame duration) */
+ if (static_ramp_variables->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)));
+
+ /* 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;
+ }
+ /* 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)));
+
+ /* 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;
+ }
+ }
+
+ 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_refresh_active = false;
+ state->fixed_refresh.program_fixed_refresh = false;
+}
+/*
+ * Sets freesync mode on a stream depending on current freesync state.
+ */
+static bool set_freesync_on_streams(struct core_freesync *core_freesync,
+ const struct dc_stream **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;
+
+ 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_refresh_active == false) {
+ /* Enable freesync */
+
+ calc_vmin_vmax(core_freesync,
+ streams[stream_idx],
+ &v_total_min, &v_total_max);
+
+ /* Update the freesync context for the stream */
+ update_stream_freesync_context(core_freesync,
+ streams[stream_idx]);
+
+ core_freesync->dc->stream_funcs.
+ adjust_vmin_vmax(core_freesync->dc, streams,
+ num_streams, 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]);
+
+ core_freesync->dc->stream_funcs.
+ adjust_vmin_vmax(
+ core_freesync->dc, streams,
+ num_streams, 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]);
+
+ core_freesync->dc->stream_funcs.
+ adjust_vmin_vmax(
+ core_freesync->dc, streams,
+ num_streams, 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
+ */
+ core_freesync->dc->stream_funcs.
+ adjust_vmin_vmax(
+ core_freesync->dc, streams,
+ num_streams, v_total_nominal,
+ v_total_nominal);
+ /* Reset the cached variables */
+ reset_freesync_state_variables(state);
+ }
+
+ }
+
+ return false;
+}
+
+static void set_static_ramp_variables(struct core_freesync *core_freesync,
+ unsigned int index, bool enable_static_screen)
+{
+ unsigned int frame_duration = 0;
+
+ struct gradual_static_ramp *static_ramp_variables =
+ &core_freesync->map[index].state.static_ramp;
+
+ /* 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) {
+
+ static_ramp_variables->ramp_is_active = true;
+
+ 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),
+ core_freesync->map[index].state.
+ nominal_refresh_rate_in_micro_hz)));
+ } else {
+ /* Going to higher refresh rate, so start from min
+ * refresh rate (max frame duration)
+ */
+ frame_duration = ((unsigned int) (div64_u64(
+ (1000000000ULL * 1000000),
+ core_freesync->map[index].caps->min_refresh_in_micro_hz)));
+ }
+
+ static_ramp_variables->
+ ramp_current_frame_duration_in_ns = frame_duration;
+ }
+
+ /* If we are ENABLING static screen, refresh rate should go DOWN.
+ * If we are DISABLING static screen, refresh rate should go UP.
+ */
+ static_ramp_variables->ramp_direction_is_up = !enable_static_screen;
+}
+
+void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync,
+ const struct dc_stream **streams, int num_streams)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ unsigned int index, v_total = 0;
+ struct freesync_state *state;
+
+ 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) {
+
+ if (state->btr.btr_active)
+ if (state->btr.frame_counter > 0)
+
+ state->btr.frame_counter--;
+
+ if (state->btr.frame_counter == 1) {
+
+ /* Restore FreeSync */
+ 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) {
+
+ state->static_ramp.ramp_is_active = false;
+
+ return;
+ }
+
+ /* Gradual Static Screen Ramping Logic */
+
+ /* Execute if ramp is active and user enabled freesync static screen*/
+ if (state->static_ramp.ramp_is_active &&
+ core_freesync->map[index].user_enable.enable_for_static) {
+
+ calc_v_total_for_static_ramp(core_freesync, streams[0],
+ index, &v_total);
+
+ /* Update the freesync context for the stream */
+ update_stream_freesync_context(core_freesync, streams[0]);
+
+ /* Program static screen ramp values */
+ core_freesync->dc->stream_funcs.adjust_vmin_vmax(
+ core_freesync->dc, streams,
+ num_streams, v_total,
+ v_total);
+ }
+}
+
+void mod_freesync_update_state(struct mod_freesync *mod_freesync,
+ const struct dc_stream **streams, int num_streams,
+ struct mod_freesync_params *freesync_params)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+ bool freesync_program_required = false;
+ unsigned int stream_index;
+ struct freesync_state *state;
+
+ if (core_freesync->num_entities == 0)
+ return;
+
+ for(stream_index = 0; stream_index < num_streams; stream_index++) {
+
+ unsigned int map_index = map_index_from_stream(core_freesync,
+ streams[stream_index]);
+
+ state = &core_freesync->map[map_index].state;
+
+ switch (freesync_params->state){
+ case FREESYNC_STATE_FULLSCREEN:
+ state->fullscreen = freesync_params->enable;
+ freesync_program_required = true;
+ state->windowed_fullscreen =
+ freesync_params->windowed_fullscreen;
+ break;
+ case FREESYNC_STATE_STATIC_SCREEN:
+ /* Static screen ramp is only enabled for embedded
+ * panels. Also change core variables only if there
+ * is a change.
+ */
+ if (dc_is_embedded_signal(
+ streams[stream_index]->sink->sink_signal) &&
+ state->static_screen !=
+ freesync_params->enable) {
+
+ /* Change the state flag */
+ state->static_screen = freesync_params->enable;
+
+ /* Change static screen ramp variables */
+ set_static_ramp_variables(core_freesync,
+ map_index,
+ freesync_params->enable);
+ }
+ /* We program the ramp starting next VUpdate */
+ break;
+ case FREESYNC_STATE_VIDEO:
+ /* Change core variables only if there is a change*/
+ if(freesync_params->update_duration_in_ns !=
+ state->time.update_duration_in_ns) {
+
+ state->video = freesync_params->enable;
+ state->time.update_duration_in_ns =
+ freesync_params->update_duration_in_ns;
+
+ freesync_program_required = true;
+ }
+ break;
+ }
+ }
+
+ if (freesync_program_required)
+ /* Program freesync according to current state*/
+ set_freesync_on_streams(core_freesync, streams, num_streams);
+}
+
+
+bool mod_freesync_get_state(struct mod_freesync *mod_freesync,
+ const struct dc_stream *stream,
+ struct mod_freesync_params *freesync_params)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ unsigned int index = map_index_from_stream(core_freesync, stream);
+
+ if (core_freesync->map[index].state.fullscreen) {
+ freesync_params->state = FREESYNC_STATE_FULLSCREEN;
+ freesync_params->enable = true;
+ } else if (core_freesync->map[index].state.static_screen) {
+ freesync_params->state = FREESYNC_STATE_STATIC_SCREEN;
+ freesync_params->enable = true;
+ } else if (core_freesync->map[index].state.video) {
+ freesync_params->state = FREESYNC_STATE_VIDEO;
+ freesync_params->enable = true;
+ } else {
+ freesync_params->state = FREESYNC_STATE_NONE;
+ freesync_params->enable = false;
+ }
+
+ freesync_params->update_duration_in_ns =
+ core_freesync->map[index].state.time.update_duration_in_ns;
+
+ return true;
+}
+
+bool mod_freesync_set_user_enable(struct mod_freesync *mod_freesync,
+ const struct dc_stream **streams, int num_streams,
+ struct mod_freesync_user_enable *user_enable)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+ struct core_dc *core_dc = DC_TO_CORE(core_freesync->dc);
+
+ unsigned int stream_index, map_index;
+ int persistent_data = 0;
+ struct persistent_data_flag flag;
+
+ flag.save_per_edid = true;
+ flag.save_per_link = false;
+
+ for(stream_index = 0; stream_index < num_streams;
+ stream_index++){
+
+ map_index = map_index_from_stream(core_freesync,
+ streams[stream_index]);
+
+ core_freesync->map[map_index].user_enable = *user_enable;
+
+ /* Write persistent data in registry*/
+ if (core_freesync->map[map_index].user_enable.
+ enable_for_gaming)
+ persistent_data = persistent_data | 1;
+ if (core_freesync->map[map_index].user_enable.
+ enable_for_static)
+ persistent_data = persistent_data | 2;
+ if (core_freesync->map[map_index].user_enable.
+ enable_for_video)
+ persistent_data = persistent_data | 4;
+
+ dm_write_persistent_data(core_dc->ctx,
+ streams[stream_index]->sink,
+ FREESYNC_REGISTRY_NAME,
+ "userenable",
+ &persistent_data,
+ sizeof(int),
+ &flag);
+ }
+
+ set_freesync_on_streams(core_freesync, streams, num_streams);
+
+ return true;
+}
+
+bool mod_freesync_get_user_enable(struct mod_freesync *mod_freesync,
+ const struct dc_stream *stream,
+ struct mod_freesync_user_enable *user_enable)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ unsigned int index = map_index_from_stream(core_freesync, stream);
+
+ *user_enable = core_freesync->map[index].user_enable;
+
+ return true;
+}
+
+void mod_freesync_notify_mode_change(struct mod_freesync *mod_freesync,
+ const struct dc_stream **streams, int num_streams)
+{
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ unsigned int stream_index, map_index;
+ unsigned min_frame_duration_in_ns, max_frame_duration_in_ns;
+ struct freesync_state *state;
+
+ for (stream_index = 0; stream_index < num_streams; stream_index++) {
+
+ map_index = map_index_from_stream(core_freesync,
+ streams[stream_index]);
+
+ state = &core_freesync->map[map_index].state;
+
+ if (core_freesync->map[map_index].caps->supported) {
+ /* Update the field rate for new timing */
+ state->nominal_refresh_rate_in_micro_hz = 1000000 *
+ div64_u64(div64_u64((streams[stream_index]->
+ timing.pix_clk_khz * 1000),
+ streams[stream_index]->timing.v_total),
+ streams[stream_index]->timing.h_total);
+
+ /* 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;
+
+ }
+ }
+
+ /* Program freesync according to current state*/
+ set_freesync_on_streams(core_freesync, streams, num_streams);
+}
+
+/* Add the timestamps to the cache and determine whether BTR programming
+ * is required, depending on the times calculated
+ */
+static void update_timestamps(struct core_freesync *core_freesync,
+ const struct dc_stream *stream, unsigned int map_index,
+ unsigned int last_render_time_in_us)
+{
+ struct freesync_state *state = &core_freesync->map[map_index].state;
+
+ state->time.render_times[state->time.render_times_index] =
+ last_render_time_in_us;
+ state->time.render_times_index++;
+
+ if (state->time.render_times_index >= RENDER_TIMES_MAX_COUNT)
+ state->time.render_times_index = 0;
+
+ if (last_render_time_in_us + BTR_EXIT_MARGIN <
+ state->time.max_render_time_in_us) {
+
+ /* Exit Below the Range */
+ if (state->btr.btr_active) {
+
+ state->btr.program_btr = true;
+ state->btr.btr_active = false;
+ state->btr.frame_counter = 0;
+
+ /* Exit Fixed Refresh mode */
+ } else if (state->fixed_refresh.fixed_refresh_active) {
+
+ state->fixed_refresh.program_fixed_refresh = true;
+ state->fixed_refresh.fixed_refresh_active = false;
+
+ }
+
+ } else if (last_render_time_in_us > state->time.max_render_time_in_us) {
+
+ /* Enter Below the Range */
+ if (!state->btr.btr_active &&
+ core_freesync->map[map_index].caps->btr_supported) {
+
+ state->btr.program_btr = true;
+ state->btr.btr_active = true;
+
+ /* Enter Fixed Refresh mode */
+ } else if (!state->fixed_refresh.fixed_refresh_active &&
+ !core_freesync->map[map_index].caps->btr_supported) {
+
+ state->fixed_refresh.program_fixed_refresh = true;
+ state->fixed_refresh.fixed_refresh_active = true;
+
+ }
+ }
+
+ /* When Below the Range is active, must react on every frame */
+ if (state->btr.btr_active)
+ state->btr.program_btr = true;
+}
+
+static void apply_below_the_range(struct core_freesync *core_freesync,
+ const struct dc_stream *stream, unsigned int map_index,
+ unsigned int last_render_time_in_us)
+{
+ 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 inserted_frame_v_total = 0;
+ unsigned int vmin = 0, vmax = 0;
+ unsigned int min_frame_duration_in_ns = 0;
+ struct freesync_state *state = &core_freesync->map[map_index].state;
+
+ if (!state->btr.program_btr)
+ return;
+
+ state->btr.program_btr = false;
+
+ min_frame_duration_in_ns = ((unsigned int) (div64_u64(
+ (1000000000ULL * 1000000),
+ state->nominal_refresh_rate_in_micro_hz)));
+
+ /* Program BTR */
+
+ /* BTR set to "not active" so disengage */
+ if (!state->btr.btr_active)
+
+ /* Restore FreeSync */
+ set_freesync_on_streams(core_freesync, &stream, 1);
+
+ /* 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 +
+ state->btr.mid_point_in_us- 1) /
+ state->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 = (state->btr.mid_point_in_us >
+ frame_time_in_us) ?
+ (state->btr.mid_point_in_us - frame_time_in_us):
+ (frame_time_in_us - state->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 /
+ state->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 = (state->btr.mid_point_in_us >
+ frame_time_in_us) ?
+ (state->btr.mid_point_in_us - frame_time_in_us):
+ (frame_time_in_us - state->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.
+ */
+ if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2)
+ frames_to_insert = mid_point_frames_ceil;
+ else
+ frames_to_insert = mid_point_frames_floor;
+
+ /* Either we've calculated the number of frames to insert,
+ * or we need to insert min duration frames
+ */
+ if (frames_to_insert > 0)
+ inserted_frame_duration_in_us = last_render_time_in_us /
+ frames_to_insert;
+
+ if (inserted_frame_duration_in_us <
+ state->time.min_render_time_in_us)
+
+ inserted_frame_duration_in_us =
+ state->time.min_render_time_in_us;
+
+ /* We need the v_total_min from capability */
+ calc_vmin_vmax(core_freesync, stream, &vmin, &vmax);
+
+ inserted_frame_v_total = vmin;
+ if (min_frame_duration_in_ns / 1000)
+ inserted_frame_v_total = inserted_frame_duration_in_us *
+ vmin / (min_frame_duration_in_ns / 1000);
+
+ /* Set length of inserted frames as v_total_max*/
+ vmax = inserted_frame_v_total;
+
+ /* Program V_TOTAL */
+ core_freesync->dc->stream_funcs.adjust_vmin_vmax(
+ core_freesync->dc, &stream,
+ 1, vmin,
+ vmax);
+
+ /* Cache the calculated variables */
+ state->btr.inserted_frame_duration_in_us =
+ inserted_frame_duration_in_us;
+ state->btr.frames_to_insert = frames_to_insert;
+ state->btr.frame_counter = frames_to_insert;
+
+ }
+}
+
+static void apply_fixed_refresh(struct core_freesync *core_freesync,
+ const struct dc_stream *stream, unsigned int map_index)
+{
+ unsigned int vmin = 0, vmax = 0;
+ struct freesync_state *state = &core_freesync->map[map_index].state;
+
+ if (!state->fixed_refresh.program_fixed_refresh)
+ return;
+
+ state->fixed_refresh.program_fixed_refresh = false;
+
+ /* Program Fixed Refresh */
+
+ /* Fixed Refresh set to "not active" so disengage */
+ if (!state->fixed_refresh.fixed_refresh_active) {
+ set_freesync_on_streams(core_freesync, &stream, 1);
+
+ /* Fixed Refresh set to "active" so engage (fix to max) */
+ } else {
+
+ calc_vmin_vmax(core_freesync, stream, &vmin, &vmax);
+
+ vmax = vmin;
+
+ core_freesync->dc->stream_funcs.adjust_vmin_vmax(
+ core_freesync->dc, &stream,
+ 1, vmin,
+ vmax);
+ }
+}
+
+void mod_freesync_pre_update_plane_addresses(struct mod_freesync *mod_freesync,
+ const struct dc_stream **streams, int num_streams,
+ unsigned int curr_time_stamp_in_us)
+{
+ unsigned int stream_index, map_index, last_render_time_in_us = 0;
+ struct core_freesync *core_freesync =
+ MOD_FREESYNC_TO_CORE(mod_freesync);
+
+ for (stream_index = 0; stream_index < num_streams; stream_index++) {
+
+ map_index = map_index_from_stream(core_freesync,
+ streams[stream_index]);
+
+ if (core_freesync->map[map_index].caps->supported) {
+
+ last_render_time_in_us = curr_time_stamp_in_us -
+ core_freesync->map[map_index].state.time.
+ prev_time_stamp_in_us;
+
+ /* Add the timestamps to the cache and determine
+ * whether BTR program is required
+ */
+ update_timestamps(core_freesync, streams[stream_index],
+ map_index, last_render_time_in_us);
+
+ if (core_freesync->map[map_index].state.fullscreen &&
+ core_freesync->map[map_index].user_enable.
+ enable_for_gaming) {
+
+ if (core_freesync->map[map_index].caps->btr_supported) {
+
+ apply_below_the_range(core_freesync,
+ streams[stream_index], map_index,
+ last_render_time_in_us);
+ } else {
+ apply_fixed_refresh(core_freesync,
+ streams[stream_index], map_index);
+ }
+ }
+
+ core_freesync->map[map_index].state.time.
+ prev_time_stamp_in_us = curr_time_stamp_in_us;
+ }
+
+ }
+}