/* * Copyright 2016-2023 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #include "dm_services.h"#include "dc.h"#include "mod_freesync.h"#include "core_types.h" #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 32 #define MIN_REFRESH_RANGE 10/* Refresh rate ramp at a fixed rate of 65 Hz/second */#define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65)/* Number of elements in the render times cache array */#define RENDER_TIMES_MAX_COUNT 10/* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */#define BTR_MAX_MARGIN 2500/* Threshold to change BTR multiplier (to avoid frequent changes) */#define BTR_DRIFT_MARGIN 2000/* Threshold to exit fixed refresh rate */#define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 1/* Number of consecutive frames to check before entering/exiting fixed refresh */#define FIXED_REFRESH_ENTER_FRAME_COUNT 5#define FIXED_REFRESH_EXIT_FRAME_COUNT 10/* Flip interval workaround constants */#define VSYNCS_BETWEEN_FLIP_THRESHOLD 2#define FREESYNC_CONSEC_FLIP_AFTER_VSYNC 5#define FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US 500 struct core_freesync { struct mod_freesync public; struct dc *dc;}; #define MOD_FREESYNC_TO_CORE(mod_freesync)\ container_of(mod_freesync, struct core_freesync, public) struct mod_freesync *mod_freesync_create(struct dc *dc){ struct core_freesync *core_freesync = kzalloc(sizeof(struct core_freesync), GFP_KERNEL); if (core_freesync == NULL) goto fail_alloc_context; if (dc == NULL) goto fail_construct; core_freesync->dc = dc; return &core_freesync->public; fail_construct: kfree(core_freesync); fail_alloc_context: return NULL;} void mod_freesync_destroy(struct mod_freesync *mod_freesync){ struct core_freesync *core_freesync = NULL; if (mod_freesync == NULL) return; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); kfree(core_freesync);} #if 0 /* Unused currently */static unsigned int calc_refresh_in_uhz_from_duration( unsigned int duration_in_ns){ unsigned int refresh_in_uhz = ((unsigned int)(div64_u64((1000000000ULL * 1000000), duration_in_ns))); return refresh_in_uhz;}#endif static unsigned int calc_duration_in_us_from_refresh_in_uhz( unsigned int refresh_in_uhz){ unsigned int duration_in_us = ((unsigned int)(div64_u64((1000000000ULL * 1000), refresh_in_uhz))); return duration_in_us;} static unsigned int calc_duration_in_us_from_v_total( const struct dc_stream_state *stream, const struct mod_vrr_params *in_vrr, unsigned int v_total){ unsigned int duration_in_us = (unsigned int)(div64_u64(((unsigned long long)(v_total) * 10000) * stream->timing.h_total, stream->timing.pix_clk_100hz)); return duration_in_us;} unsigned int mod_freesync_calc_v_total_from_refresh( const struct dc_stream_state *stream, unsigned int refresh_in_uhz){ unsigned int v_total; unsigned int frame_duration_in_ns; frame_duration_in_ns = ((unsigned int)(div64_u64((1000000000ULL * 1000000), refresh_in_uhz))); v_total = div64_u64(div64_u64(((unsigned long long)( frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total) + 500000, 1000000); /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) { ASSERT(v_total < stream->timing.v_total); v_total = stream->timing.v_total; } return v_total;} static unsigned int calc_v_total_from_duration( const struct dc_stream_state *stream, const struct mod_vrr_params *vrr, unsigned int duration_in_us){ unsigned int v_total = 0; if (duration_in_us < vrr->min_duration_in_us) duration_in_us = vrr->min_duration_in_us; if (duration_in_us > vrr->max_duration_in_us) duration_in_us = vrr->max_duration_in_us; if (dc_is_hdmi_signal(stream->signal)) { // change for HDMI to comply with spec uint32_t h_total_up_scaled; h_total_up_scaled = stream->timing.h_total * 10000; v_total = div_u64((unsigned long long)duration_in_us * stream->timing.pix_clk_100hz + (h_total_up_scaled - 1), h_total_up_scaled); //ceiling for MMax and MMin for MVRR } else { v_total = div64_u64(div64_u64(((unsigned long long)( duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); } /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) { ASSERT(v_total < stream->timing.v_total); v_total = stream->timing.v_total; } return v_total;} static void update_v_total_for_static_ramp( struct core_freesync *core_freesync, const struct dc_stream_state *stream, struct mod_vrr_params *in_out_vrr){ unsigned int v_total = 0; unsigned int current_duration_in_us = calc_duration_in_us_from_v_total( stream, in_out_vrr, in_out_vrr->adjust.v_total_max); unsigned int target_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); bool ramp_direction_is_up = (current_duration_in_us > target_duration_in_us) ? true : false; /* Calculate ratio between new and current frame duration with 3 digit */ unsigned int frame_duration_ratio = div64_u64(1000000, (1000 + div64_u64(((unsigned long long)( STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) * current_duration_in_us), 1000000))); /* Calculate delta between new and current frame duration in us */ unsigned int frame_duration_delta = div64_u64(((unsigned long long)( current_duration_in_us) * (1000 - frame_duration_ratio)), 1000); /* Adjust frame duration delta based on ratio between current and * standard frame duration (frame duration at 60 Hz refresh rate). */ unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)( frame_duration_delta) * current_duration_in_us), 16666); /* Going to a higher refresh rate (lower frame duration) */ if (ramp_direction_is_up) { /* Reduce frame duration */ current_duration_in_us -= ramp_rate_interpolated; /* Adjust for frame duration below min */ if (current_duration_in_us <= target_duration_in_us) { in_out_vrr->fixed.ramping_active = false; in_out_vrr->fixed.ramping_done = true; current_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); } /* Going to a lower refresh rate (larger frame duration) */ } else { /* Increase frame duration */ current_duration_in_us += ramp_rate_interpolated; /* Adjust for frame duration above max */ if (current_duration_in_us >= target_duration_in_us) { in_out_vrr->fixed.ramping_active = false; in_out_vrr->fixed.ramping_done = true; current_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); } } v_total = div64_u64(div64_u64(((unsigned long long)( current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) v_total = stream->timing.v_total; in_out_vrr->adjust.v_total_min = v_total; in_out_vrr->adjust.v_total_max = v_total;} static void apply_below_the_range(struct core_freesync *core_freesync, const struct dc_stream_state *stream, unsigned int last_render_time_in_us, struct mod_vrr_params *in_out_vrr){ unsigned int inserted_frame_duration_in_us = 0; unsigned int mid_point_frames_ceil = 0; unsigned int mid_point_frames_floor = 0; unsigned int frame_time_in_us = 0; unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF; unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF; unsigned int frames_to_insert = 0; unsigned int delta_from_mid_point_delta_in_us; unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us; /* Program BTR */ if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) { /* Exit Below the Range */ if (in_out_vrr->btr.btr_active) { in_out_vrr->btr.frame_counter = 0; in_out_vrr->btr.btr_active = false; } } else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) { /* Enter Below the Range */ if (!in_out_vrr->btr.btr_active) in_out_vrr->btr.btr_active = true; } /* BTR set to "not active" so disengage */ if (!in_out_vrr->btr.btr_active) { in_out_vrr->btr.inserted_duration_in_us = 0; in_out_vrr->btr.frames_to_insert = 0; in_out_vrr->btr.frame_counter = 0; /* Restore FreeSync */ in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); /* BTR set to "active" so engage */ } else { /* Calculate number of midPoint frames that could fit within * the render time interval - take ceil of this value */ mid_point_frames_ceil = (last_render_time_in_us + in_out_vrr->btr.mid_point_in_us - 1) / in_out_vrr->btr.mid_point_in_us; if (mid_point_frames_ceil > 0) { frame_time_in_us = last_render_time_in_us / mid_point_frames_ceil; delta_from_mid_point_in_us_1 = (in_out_vrr->btr.mid_point_in_us > frame_time_in_us) ? (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); } /* Calculate number of midPoint frames that could fit within * the render time interval - take floor of this value */ mid_point_frames_floor = last_render_time_in_us / in_out_vrr->btr.mid_point_in_us; if (mid_point_frames_floor > 0) { frame_time_in_us = last_render_time_in_us / mid_point_frames_floor; delta_from_mid_point_in_us_2 = (in_out_vrr->btr.mid_point_in_us > frame_time_in_us) ? (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); } /* Choose number of frames to insert based on how close it * can get to the mid point of the variable range. * - Delta for CEIL: delta_from_mid_point_in_us_1 * - Delta for FLOOR: delta_from_mid_point_in_us_2 */ if (mid_point_frames_ceil && (last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) { /* Check for out of range. * If using CEIL produces a value that is out of range, * then we are forced to use FLOOR. */ frames_to_insert = mid_point_frames_floor; } else if (mid_point_frames_floor < 2) { /* Check if FLOOR would result in non-LFC. In this case * choose to use CEIL */ frames_to_insert = mid_point_frames_ceil; } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { /* If choosing CEIL results in a frame duration that is * closer to the mid point of the range. * Choose CEIL */ frames_to_insert = mid_point_frames_ceil; } else { /* If choosing FLOOR results in a frame duration that is * closer to the mid point of the range. * Choose FLOOR */ frames_to_insert = mid_point_frames_floor; } /* Prefer current frame multiplier when BTR is enabled unless it drifts * too far from the midpoint */ if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 - delta_from_mid_point_in_us_1; } else { delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 - delta_from_mid_point_in_us_2; } if (in_out_vrr->btr.frames_to_insert != 0 && delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) { if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) < max_render_time_in_us) && ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) > in_out_vrr->min_duration_in_us)) frames_to_insert = in_out_vrr->btr.frames_to_insert; } /* Either we've calculated the number of frames to insert, * or we need to insert min duration frames */ if (frames_to_insert && (last_render_time_in_us / frames_to_insert) < in_out_vrr->min_duration_in_us){ frames_to_insert -= (frames_to_insert > 1) ? 1 : 0; } if (frames_to_insert > 0) inserted_frame_duration_in_us = last_render_time_in_us / frames_to_insert; if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us) inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us; /* Cache the calculated variables */ in_out_vrr->btr.inserted_duration_in_us = inserted_frame_duration_in_us; in_out_vrr->btr.frames_to_insert = frames_to_insert; in_out_vrr->btr.frame_counter = frames_to_insert; }} static void apply_fixed_refresh(struct core_freesync *core_freesync, const struct dc_stream_state *stream, unsigned int last_render_time_in_us, struct mod_vrr_params *in_out_vrr){ bool update = false; unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us; /* Compute the exit refresh rate and exit frame duration */ unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us) + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ)); unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz; if (last_render_time_in_us < exit_frame_duration_in_us) { /* Exit Fixed Refresh mode */ if (in_out_vrr->fixed.fixed_active) { in_out_vrr->fixed.frame_counter++; if (in_out_vrr->fixed.frame_counter > FIXED_REFRESH_EXIT_FRAME_COUNT) { in_out_vrr->fixed.frame_counter = 0; in_out_vrr->fixed.fixed_active = false; in_out_vrr->fixed.target_refresh_in_uhz = 0; update = true; } } else in_out_vrr->fixed.frame_counter = 0; } else if (last_render_time_in_us > max_render_time_in_us) { /* Enter Fixed Refresh mode */ if (!in_out_vrr->fixed.fixed_active) { in_out_vrr->fixed.frame_counter++; if (in_out_vrr->fixed.frame_counter > FIXED_REFRESH_ENTER_FRAME_COUNT) { in_out_vrr->fixed.frame_counter = 0; in_out_vrr->fixed.fixed_active = true; in_out_vrr->fixed.target_refresh_in_uhz = in_out_vrr->max_refresh_in_uhz; update = true; } } else in_out_vrr->fixed.frame_counter = 0; } if (update) { if (in_out_vrr->fixed.fixed_active) { in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh( stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = in_out_vrr->adjust.v_total_min; } else { in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); } }} static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr, unsigned int curr_time_stamp_in_us){ in_vrr->flip_interval.vsync_to_flip_in_us = curr_time_stamp_in_us - in_vrr->flip_interval.v_update_timestamp_in_us; /* Determine conditions for stopping workaround */ if (in_vrr->flip_interval.flip_interval_workaround_active && in_vrr->flip_interval.vsyncs_between_flip < VSYNCS_BETWEEN_FLIP_THRESHOLD && in_vrr->flip_interval.vsync_to_flip_in_us > FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { in_vrr->flip_interval.flip_interval_detect_counter = 0; in_vrr->flip_interval.program_flip_interval_workaround = true; in_vrr->flip_interval.flip_interval_workaround_active = false; } else { /* Determine conditions for starting workaround */ if (in_vrr->flip_interval.vsyncs_between_flip >= VSYNCS_BETWEEN_FLIP_THRESHOLD && in_vrr->flip_interval.vsync_to_flip_in_us < FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { /* Increase flip interval counter we have 2 vsyncs between flips and * vsync to flip interval is less than 500us */ in_vrr->flip_interval.flip_interval_detect_counter++; if (in_vrr->flip_interval.flip_interval_detect_counter > FREESYNC_CONSEC_FLIP_AFTER_VSYNC) { /* Start workaround if we detect 5 consecutive instances of the above case */ in_vrr->flip_interval.program_flip_interval_workaround = true; in_vrr->flip_interval.flip_interval_workaround_active = true; } } else {Lines 1–500 of 1387. 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/* * Copyright 2016-2023 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #include "dm_services.h" #include "dc.h" #include "mod_freesync.h" #include "core_types.h" #define MOD_FREESYNC_MAX_CONCURRENT_STREAMS 32 #define MIN_REFRESH_RANGE 10 /* Refresh rate ramp at a fixed rate of 65 Hz/second */ #define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65) /* Number of elements in the render times cache array */ #define RENDER_TIMES_MAX_COUNT 10 /* Threshold to exit/exit BTR (to avoid frequent enter-exits at the lower limit) */ #define BTR_MAX_MARGIN 2500 /* Threshold to change BTR multiplier (to avoid frequent changes) */ #define BTR_DRIFT_MARGIN 2000 /* Threshold to exit fixed refresh rate */ #define FIXED_REFRESH_EXIT_MARGIN_IN_HZ 1 /* Number of consecutive frames to check before entering/exiting fixed refresh */ #define FIXED_REFRESH_ENTER_FRAME_COUNT 5 #define FIXED_REFRESH_EXIT_FRAME_COUNT 10 /* Flip interval workaround constants */ #define VSYNCS_BETWEEN_FLIP_THRESHOLD 2 #define FREESYNC_CONSEC_FLIP_AFTER_VSYNC 5 #define FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US 500 struct core_freesync { struct mod_freesync public; struct dc *dc; }; #define MOD_FREESYNC_TO_CORE(mod_freesync)\ container_of(mod_freesync, struct core_freesync, public) struct mod_freesync *mod_freesync_create(struct dc *dc) { struct core_freesync *core_freesync = kzalloc(sizeof(struct core_freesync), GFP_KERNEL); if (core_freesync == NULL) goto fail_alloc_context; if (dc == NULL) goto fail_construct; core_freesync->dc = dc; return &core_freesync->public; fail_construct: kfree(core_freesync); fail_alloc_context: return NULL; } void mod_freesync_destroy(struct mod_freesync *mod_freesync) { struct core_freesync *core_freesync = NULL; if (mod_freesync == NULL) return; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); kfree(core_freesync); } #if 0 /* Unused currently */ static unsigned int calc_refresh_in_uhz_from_duration( unsigned int duration_in_ns) { unsigned int refresh_in_uhz = ((unsigned int)(div64_u64((1000000000ULL * 1000000), duration_in_ns))); return refresh_in_uhz; } #endif static unsigned int calc_duration_in_us_from_refresh_in_uhz( unsigned int refresh_in_uhz) { unsigned int duration_in_us = ((unsigned int)(div64_u64((1000000000ULL * 1000), refresh_in_uhz))); return duration_in_us; } static unsigned int calc_duration_in_us_from_v_total( const struct dc_stream_state *stream, const struct mod_vrr_params *in_vrr, unsigned int v_total) { unsigned int duration_in_us = (unsigned int)(div64_u64(((unsigned long long)(v_total) * 10000) * stream->timing.h_total, stream->timing.pix_clk_100hz)); return duration_in_us; } unsigned int mod_freesync_calc_v_total_from_refresh( const struct dc_stream_state *stream, unsigned int refresh_in_uhz) { unsigned int v_total; unsigned int frame_duration_in_ns; frame_duration_in_ns = ((unsigned int)(div64_u64((1000000000ULL * 1000000), refresh_in_uhz))); v_total = div64_u64(div64_u64(((unsigned long long)( frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total) + 500000, 1000000); /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) { ASSERT(v_total < stream->timing.v_total); v_total = stream->timing.v_total; } return v_total; } static unsigned int calc_v_total_from_duration( const struct dc_stream_state *stream, const struct mod_vrr_params *vrr, unsigned int duration_in_us) { unsigned int v_total = 0; if (duration_in_us < vrr->min_duration_in_us) duration_in_us = vrr->min_duration_in_us; if (duration_in_us > vrr->max_duration_in_us) duration_in_us = vrr->max_duration_in_us; if (dc_is_hdmi_signal(stream->signal)) { // change for HDMI to comply with spec uint32_t h_total_up_scaled; h_total_up_scaled = stream->timing.h_total * 10000; v_total = div_u64((unsigned long long)duration_in_us * stream->timing.pix_clk_100hz + (h_total_up_scaled - 1), h_total_up_scaled); //ceiling for MMax and MMin for MVRR } else { v_total = div64_u64(div64_u64(((unsigned long long)( duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); } /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) { ASSERT(v_total < stream->timing.v_total); v_total = stream->timing.v_total; } return v_total; } static void update_v_total_for_static_ramp( struct core_freesync *core_freesync, const struct dc_stream_state *stream, struct mod_vrr_params *in_out_vrr) { unsigned int v_total = 0; unsigned int current_duration_in_us = calc_duration_in_us_from_v_total( stream, in_out_vrr, in_out_vrr->adjust.v_total_max); unsigned int target_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); bool ramp_direction_is_up = (current_duration_in_us > target_duration_in_us) ? true : false; /* Calculate ratio between new and current frame duration with 3 digit */ unsigned int frame_duration_ratio = div64_u64(1000000, (1000 + div64_u64(((unsigned long long)( STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME) * current_duration_in_us), 1000000))); /* Calculate delta between new and current frame duration in us */ unsigned int frame_duration_delta = div64_u64(((unsigned long long)( current_duration_in_us) * (1000 - frame_duration_ratio)), 1000); /* Adjust frame duration delta based on ratio between current and * standard frame duration (frame duration at 60 Hz refresh rate). */ unsigned int ramp_rate_interpolated = div64_u64(((unsigned long long)( frame_duration_delta) * current_duration_in_us), 16666); /* Going to a higher refresh rate (lower frame duration) */ if (ramp_direction_is_up) { /* Reduce frame duration */ current_duration_in_us -= ramp_rate_interpolated; /* Adjust for frame duration below min */ if (current_duration_in_us <= target_duration_in_us) { in_out_vrr->fixed.ramping_active = false; in_out_vrr->fixed.ramping_done = true; current_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); } /* Going to a lower refresh rate (larger frame duration) */ } else { /* Increase frame duration */ current_duration_in_us += ramp_rate_interpolated; /* Adjust for frame duration above max */ if (current_duration_in_us >= target_duration_in_us) { in_out_vrr->fixed.ramping_active = false; in_out_vrr->fixed.ramping_done = true; current_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( in_out_vrr->fixed.target_refresh_in_uhz); } } v_total = div64_u64(div64_u64(((unsigned long long)( current_duration_in_us) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000); /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) v_total = stream->timing.v_total; in_out_vrr->adjust.v_total_min = v_total; in_out_vrr->adjust.v_total_max = v_total; } static void apply_below_the_range(struct core_freesync *core_freesync, const struct dc_stream_state *stream, unsigned int last_render_time_in_us, struct mod_vrr_params *in_out_vrr) { unsigned int inserted_frame_duration_in_us = 0; unsigned int mid_point_frames_ceil = 0; unsigned int mid_point_frames_floor = 0; unsigned int frame_time_in_us = 0; unsigned int delta_from_mid_point_in_us_1 = 0xFFFFFFFF; unsigned int delta_from_mid_point_in_us_2 = 0xFFFFFFFF; unsigned int frames_to_insert = 0; unsigned int delta_from_mid_point_delta_in_us; unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us - in_out_vrr->btr.margin_in_us; /* Program BTR */ if ((last_render_time_in_us + in_out_vrr->btr.margin_in_us / 2) < max_render_time_in_us) { /* Exit Below the Range */ if (in_out_vrr->btr.btr_active) { in_out_vrr->btr.frame_counter = 0; in_out_vrr->btr.btr_active = false; } } else if (last_render_time_in_us > (max_render_time_in_us + in_out_vrr->btr.margin_in_us / 2)) { /* Enter Below the Range */ if (!in_out_vrr->btr.btr_active) in_out_vrr->btr.btr_active = true; } /* BTR set to "not active" so disengage */ if (!in_out_vrr->btr.btr_active) { in_out_vrr->btr.inserted_duration_in_us = 0; in_out_vrr->btr.frames_to_insert = 0; in_out_vrr->btr.frame_counter = 0; /* Restore FreeSync */ in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); /* BTR set to "active" so engage */ } else { /* Calculate number of midPoint frames that could fit within * the render time interval - take ceil of this value */ mid_point_frames_ceil = (last_render_time_in_us + in_out_vrr->btr.mid_point_in_us - 1) / in_out_vrr->btr.mid_point_in_us; if (mid_point_frames_ceil > 0) { frame_time_in_us = last_render_time_in_us / mid_point_frames_ceil; delta_from_mid_point_in_us_1 = (in_out_vrr->btr.mid_point_in_us > frame_time_in_us) ? (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); } /* Calculate number of midPoint frames that could fit within * the render time interval - take floor of this value */ mid_point_frames_floor = last_render_time_in_us / in_out_vrr->btr.mid_point_in_us; if (mid_point_frames_floor > 0) { frame_time_in_us = last_render_time_in_us / mid_point_frames_floor; delta_from_mid_point_in_us_2 = (in_out_vrr->btr.mid_point_in_us > frame_time_in_us) ? (in_out_vrr->btr.mid_point_in_us - frame_time_in_us) : (frame_time_in_us - in_out_vrr->btr.mid_point_in_us); } /* Choose number of frames to insert based on how close it * can get to the mid point of the variable range. * - Delta for CEIL: delta_from_mid_point_in_us_1 * - Delta for FLOOR: delta_from_mid_point_in_us_2 */ if (mid_point_frames_ceil && (last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) { /* Check for out of range. * If using CEIL produces a value that is out of range, * then we are forced to use FLOOR. */ frames_to_insert = mid_point_frames_floor; } else if (mid_point_frames_floor < 2) { /* Check if FLOOR would result in non-LFC. In this case * choose to use CEIL */ frames_to_insert = mid_point_frames_ceil; } else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { /* If choosing CEIL results in a frame duration that is * closer to the mid point of the range. * Choose CEIL */ frames_to_insert = mid_point_frames_ceil; } else { /* If choosing FLOOR results in a frame duration that is * closer to the mid point of the range. * Choose FLOOR */ frames_to_insert = mid_point_frames_floor; } /* Prefer current frame multiplier when BTR is enabled unless it drifts * too far from the midpoint */ if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) { delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 - delta_from_mid_point_in_us_1; } else { delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 - delta_from_mid_point_in_us_2; } if (in_out_vrr->btr.frames_to_insert != 0 && delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) { if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) < max_render_time_in_us) && ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) > in_out_vrr->min_duration_in_us)) frames_to_insert = in_out_vrr->btr.frames_to_insert; } /* Either we've calculated the number of frames to insert, * or we need to insert min duration frames */ if (frames_to_insert && (last_render_time_in_us / frames_to_insert) < in_out_vrr->min_duration_in_us){ frames_to_insert -= (frames_to_insert > 1) ? 1 : 0; } if (frames_to_insert > 0) inserted_frame_duration_in_us = last_render_time_in_us / frames_to_insert; if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us) inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us; /* Cache the calculated variables */ in_out_vrr->btr.inserted_duration_in_us = inserted_frame_duration_in_us; in_out_vrr->btr.frames_to_insert = frames_to_insert; in_out_vrr->btr.frame_counter = frames_to_insert; } } static void apply_fixed_refresh(struct core_freesync *core_freesync, const struct dc_stream_state *stream, unsigned int last_render_time_in_us, struct mod_vrr_params *in_out_vrr) { bool update = false; unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us; /* Compute the exit refresh rate and exit frame duration */ unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us) + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ)); unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz; if (last_render_time_in_us < exit_frame_duration_in_us) { /* Exit Fixed Refresh mode */ if (in_out_vrr->fixed.fixed_active) { in_out_vrr->fixed.frame_counter++; if (in_out_vrr->fixed.frame_counter > FIXED_REFRESH_EXIT_FRAME_COUNT) { in_out_vrr->fixed.frame_counter = 0; in_out_vrr->fixed.fixed_active = false; in_out_vrr->fixed.target_refresh_in_uhz = 0; update = true; } } else in_out_vrr->fixed.frame_counter = 0; } else if (last_render_time_in_us > max_render_time_in_us) { /* Enter Fixed Refresh mode */ if (!in_out_vrr->fixed.fixed_active) { in_out_vrr->fixed.frame_counter++; if (in_out_vrr->fixed.frame_counter > FIXED_REFRESH_ENTER_FRAME_COUNT) { in_out_vrr->fixed.frame_counter = 0; in_out_vrr->fixed.fixed_active = true; in_out_vrr->fixed.target_refresh_in_uhz = in_out_vrr->max_refresh_in_uhz; update = true; } } else in_out_vrr->fixed.frame_counter = 0; } if (update) { if (in_out_vrr->fixed.fixed_active) { in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh( stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = in_out_vrr->adjust.v_total_min; } else { in_out_vrr->adjust.v_total_min = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = mod_freesync_calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); } } } static void determine_flip_interval_workaround_req(struct mod_vrr_params *in_vrr, unsigned int curr_time_stamp_in_us) { in_vrr->flip_interval.vsync_to_flip_in_us = curr_time_stamp_in_us - in_vrr->flip_interval.v_update_timestamp_in_us; /* Determine conditions for stopping workaround */ if (in_vrr->flip_interval.flip_interval_workaround_active && in_vrr->flip_interval.vsyncs_between_flip < VSYNCS_BETWEEN_FLIP_THRESHOLD && in_vrr->flip_interval.vsync_to_flip_in_us > FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { in_vrr->flip_interval.flip_interval_detect_counter = 0; in_vrr->flip_interval.program_flip_interval_workaround = true; in_vrr->flip_interval.flip_interval_workaround_active = false; } else { /* Determine conditions for starting workaround */ if (in_vrr->flip_interval.vsyncs_between_flip >= VSYNCS_BETWEEN_FLIP_THRESHOLD && in_vrr->flip_interval.vsync_to_flip_in_us < FREESYNC_VSYNC_TO_FLIP_DELTA_IN_US) { /* Increase flip interval counter we have 2 vsyncs between flips and * vsync to flip interval is less than 500us */ in_vrr->flip_interval.flip_interval_detect_counter++; if (in_vrr->flip_interval.flip_interval_detect_counter > FREESYNC_CONSEC_FLIP_AFTER_VSYNC) { /* Start workaround if we detect 5 consecutive instances of the above case */ in_vrr->flip_interval.program_flip_interval_workaround = true; in_vrr->flip_interval.flip_interval_workaround_active = true; } } else {