/* * 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 #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_IN_US 10000000 /* Refresh rate ramp at a fixed rate of 65 Hz/second */ #define STATIC_SCREEN_RAMP_DELTA_REFRESH_RATE_PER_FRAME ((1000 / 60) * 65) /* Number of elements in the render times cache array */ #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 4 /* Number of consecutive frames to check before entering/exiting fixed refresh*/ #define FIXED_REFRESH_ENTER_FRAME_COUNT 5 #define FIXED_REFRESH_EXIT_FRAME_COUNT 5 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; } static unsigned int calc_v_total_from_refresh( const struct dc_stream_state *stream, unsigned int refresh_in_uhz) { unsigned int v_total; unsigned int frame_duration_in_ns; frame_duration_in_ns = ((unsigned int)(div64_u64((1000000000ULL * 1000000), refresh_in_uhz))); v_total = div64_u64(div64_u64(((unsigned long long)( frame_duration_in_ns) * (stream->timing.pix_clk_100hz / 10)), stream->timing.h_total), 1000000); /* v_total cannot be less than nominal */ if (v_total < stream->timing.v_total) { ASSERT(v_total < stream->timing.v_total); v_total = stream->timing.v_total; } return v_total; } static unsigned int calc_v_total_from_duration( const struct dc_stream_state *stream, const struct mod_vrr_params *vrr, unsigned int duration_in_us) { unsigned int v_total = 0; if (duration_in_us < vrr->min_duration_in_us) duration_in_us = vrr->min_duration_in_us; if (duration_in_us > vrr->max_duration_in_us) duration_in_us = vrr->max_duration_in_us; 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; /* 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) * 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 = calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); /* BTR set to "active" so engage */ } else { /* 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. */ if ((frame_time_in_us / mid_point_frames_ceil) > in_out_vrr->min_duration_in_us && (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2 || mid_point_frames_floor < 2)) { frames_to_insert = mid_point_frames_ceil; delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 - delta_from_mid_point_in_us_1; } else { frames_to_insert = mid_point_frames_floor; delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 - delta_from_mid_point_in_us_2; } /* Prefer current frame multiplier when BTR is enabled unless it drifts * too far from the midpoint */ if (in_out_vrr->btr.frames_to_insert != 0 && delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) { if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) < max_render_time_in_us) && ((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) > in_out_vrr->min_duration_in_us)) frames_to_insert = in_out_vrr->btr.frames_to_insert; } /* Either we've calculated the number of frames to insert, * or we need to insert min duration frames */ if (last_render_time_in_us / frames_to_insert < in_out_vrr->min_duration_in_us){ frames_to_insert -= (frames_to_insert > 1) ? 1 : 0; } if (frames_to_insert > 0) inserted_frame_duration_in_us = last_render_time_in_us / frames_to_insert; if (inserted_frame_duration_in_us < in_out_vrr->min_duration_in_us) inserted_frame_duration_in_us = in_out_vrr->min_duration_in_us; /* Cache the calculated variables */ in_out_vrr->btr.inserted_duration_in_us = inserted_frame_duration_in_us; in_out_vrr->btr.frames_to_insert = frames_to_insert; in_out_vrr->btr.frame_counter = frames_to_insert; } } static void apply_fixed_refresh(struct core_freesync *core_freesync, const struct dc_stream_state *stream, unsigned int last_render_time_in_us, struct mod_vrr_params *in_out_vrr) { bool update = false; unsigned int max_render_time_in_us = in_out_vrr->max_duration_in_us; /* Compute the exit refresh rate and exit frame duration */ unsigned int exit_refresh_rate_in_milli_hz = ((1000000000/max_render_time_in_us) + (1000*FIXED_REFRESH_EXIT_MARGIN_IN_HZ)); unsigned int exit_frame_duration_in_us = 1000000000/exit_refresh_rate_in_milli_hz; if (last_render_time_in_us < exit_frame_duration_in_us) { /* Exit Fixed Refresh mode */ if (in_out_vrr->fixed.fixed_active) { in_out_vrr->fixed.frame_counter++; if (in_out_vrr->fixed.frame_counter > FIXED_REFRESH_EXIT_FRAME_COUNT) { in_out_vrr->fixed.frame_counter = 0; in_out_vrr->fixed.fixed_active = false; in_out_vrr->fixed.target_refresh_in_uhz = 0; update = true; } } } else 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; } } } if (update) { if (in_out_vrr->fixed.fixed_active) { in_out_vrr->adjust.v_total_min = calc_v_total_from_refresh( stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = in_out_vrr->adjust.v_total_min; } else { in_out_vrr->adjust.v_total_min = calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); } } } static bool vrr_settings_require_update(struct core_freesync *core_freesync, struct mod_freesync_config *in_config, unsigned int min_refresh_in_uhz, unsigned int max_refresh_in_uhz, struct mod_vrr_params *in_vrr) { if (in_vrr->state != in_config->state) { return true; } else if (in_vrr->state == VRR_STATE_ACTIVE_FIXED && in_vrr->fixed.target_refresh_in_uhz != in_config->fixed_refresh_in_uhz) { return true; } else if (in_vrr->min_refresh_in_uhz != min_refresh_in_uhz) { return true; } else if (in_vrr->max_refresh_in_uhz != max_refresh_in_uhz) { return true; } return false; } bool mod_freesync_get_vmin_vmax(struct mod_freesync *mod_freesync, const struct dc_stream_state *stream, unsigned int *vmin, unsigned int *vmax) { *vmin = stream->adjust.v_total_min; *vmax = stream->adjust.v_total_max; return true; } bool mod_freesync_get_v_position(struct mod_freesync *mod_freesync, struct dc_stream_state *stream, unsigned int *nom_v_pos, unsigned int *v_pos) { struct core_freesync *core_freesync = NULL; struct crtc_position position; if (mod_freesync == NULL) return false; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); if (dc_stream_get_crtc_position(core_freesync->dc, &stream, 1, &position.vertical_count, &position.nominal_vcount)) { *nom_v_pos = position.nominal_vcount; *v_pos = position.vertical_count; return true; } return false; } static void build_vrr_infopacket_data_v1(const struct mod_vrr_params *vrr, struct dc_info_packet *infopacket) { /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ infopacket->sb[1] = 0x1A; /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ infopacket->sb[2] = 0x00; /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ infopacket->sb[3] = 0x00; /* PB4 = Reserved */ /* PB5 = Reserved */ /* PB6 = [Bits 7:3 = Reserved] */ /* PB6 = [Bit 0 = FreeSync Supported] */ if (vrr->state != VRR_STATE_UNSUPPORTED) infopacket->sb[6] |= 0x01; /* PB6 = [Bit 1 = FreeSync Enabled] */ if (vrr->state != VRR_STATE_DISABLED && vrr->state != VRR_STATE_UNSUPPORTED) infopacket->sb[6] |= 0x02; /* PB6 = [Bit 2 = FreeSync Active] */ if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || vrr->state == VRR_STATE_ACTIVE_FIXED) infopacket->sb[6] |= 0x04; // For v1 & 2 infoframes program nominal if non-fs mode, otherwise full range /* PB7 = FreeSync Minimum refresh rate (Hz) */ if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || vrr->state == VRR_STATE_ACTIVE_FIXED) { infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000); } else { infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); } /* PB8 = FreeSync Maximum refresh rate (Hz) * Note: We should never go above the field rate of the mode timing set. */ infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); //FreeSync HDR infopacket->sb[9] = 0; infopacket->sb[10] = 0; } static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, struct dc_info_packet *infopacket) { /* PB1 = 0x1A (24bit AMD IEEE OUI (0x00001A) - Byte 0) */ infopacket->sb[1] = 0x1A; /* PB2 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 1) */ infopacket->sb[2] = 0x00; /* PB3 = 0x00 (24bit AMD IEEE OUI (0x00001A) - Byte 2) */ infopacket->sb[3] = 0x00; /* PB4 = Reserved */ /* PB5 = Reserved */ /* PB6 = [Bits 7:3 = Reserved] */ /* PB6 = [Bit 0 = FreeSync Supported] */ if (vrr->state != VRR_STATE_UNSUPPORTED) infopacket->sb[6] |= 0x01; /* PB6 = [Bit 1 = FreeSync Enabled] */ if (vrr->state != VRR_STATE_DISABLED && vrr->state != VRR_STATE_UNSUPPORTED) infopacket->sb[6] |= 0x02; /* PB6 = [Bit 2 = FreeSync Active] */ if (vrr->state == VRR_STATE_ACTIVE_VARIABLE || vrr->state == VRR_STATE_ACTIVE_FIXED) infopacket->sb[6] |= 0x04; if (vrr->state == VRR_STATE_ACTIVE_FIXED) { /* PB7 = FreeSync Minimum refresh rate (Hz) */ infopacket->sb[7] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000); /* PB8 = FreeSync Maximum refresh rate (Hz) */ infopacket->sb[8] = (unsigned char)((vrr->fixed_refresh_in_uhz + 500000) / 1000000); } else if (vrr->state == VRR_STATE_ACTIVE_VARIABLE) { /* PB7 = FreeSync Minimum refresh rate (Hz) */ infopacket->sb[7] = (unsigned char)((vrr->min_refresh_in_uhz + 500000) / 1000000); /* PB8 = FreeSync Maximum refresh rate (Hz) */ infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); } else { // Non-fs case, program nominal range /* PB7 = FreeSync Minimum refresh rate (Hz) */ infopacket->sb[7] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); /* PB8 = FreeSync Maximum refresh rate (Hz) */ infopacket->sb[8] = (unsigned char)((vrr->max_refresh_in_uhz + 500000) / 1000000); } //FreeSync HDR infopacket->sb[9] = 0; infopacket->sb[10] = 0; } static void build_vrr_infopacket_fs2_data(enum color_transfer_func app_tf, struct dc_info_packet *infopacket) { if (app_tf != TRANSFER_FUNC_UNKNOWN) { infopacket->valid = true; infopacket->sb[6] |= 0x08; // PB6 = [Bit 3 = Native Color Active] if (app_tf == TRANSFER_FUNC_GAMMA_22) { infopacket->sb[9] |= 0x04; // PB6 = [Bit 2 = Gamma 2.2 EOTF Active] } } } static void build_vrr_infopacket_header_v1(enum signal_type signal, struct dc_info_packet *infopacket, unsigned int *payload_size) { if (dc_is_hdmi_signal(signal)) { /* HEADER */ /* HB0 = Packet Type = 0x83 (Source Product * Descriptor InfoFrame) */ infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; /* HB1 = Version = 0x01 */ infopacket->hb1 = 0x01; /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x08] */ infopacket->hb2 = 0x08; *payload_size = 0x08; } else if (dc_is_dp_signal(signal)) { /* HEADER */ /* HB0 = Secondary-data Packet ID = 0 - Only non-zero * when used to associate audio related info packets */ infopacket->hb0 = 0x00; /* HB1 = Packet Type = 0x83 (Source Product * Descriptor InfoFrame) */ infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; /* HB2 = [Bits 7:0 = Least significant eight bits - * For INFOFRAME, the value must be 1Bh] */ infopacket->hb2 = 0x1B; /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x1] * [Bits 1:0 = Most significant two bits = 0x00] */ infopacket->hb3 = 0x04; *payload_size = 0x1B; } } static void build_vrr_infopacket_header_v2(enum signal_type signal, struct dc_info_packet *infopacket, unsigned int *payload_size) { if (dc_is_hdmi_signal(signal)) { /* HEADER */ /* HB0 = Packet Type = 0x83 (Source Product * Descriptor InfoFrame) */ infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; /* HB1 = Version = 0x02 */ infopacket->hb1 = 0x02; /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length = 0x09] */ infopacket->hb2 = 0x09; *payload_size = 0x0A; } else if (dc_is_dp_signal(signal)) { /* HEADER */ /* HB0 = Secondary-data Packet ID = 0 - Only non-zero * when used to associate audio related info packets */ infopacket->hb0 = 0x00; /* HB1 = Packet Type = 0x83 (Source Product * Descriptor InfoFrame) */ infopacket->hb1 = DC_HDMI_INFOFRAME_TYPE_SPD; /* HB2 = [Bits 7:0 = Least significant eight bits - * For INFOFRAME, the value must be 1Bh] */ infopacket->hb2 = 0x1B; /* HB3 = [Bits 7:2 = INFOFRAME SDP Version Number = 0x2] * [Bits 1:0 = Most significant two bits = 0x00] */ infopacket->hb3 = 0x08; *payload_size = 0x1B; } } static void build_vrr_infopacket_checksum(unsigned int *payload_size, struct dc_info_packet *infopacket) { /* Calculate checksum */ unsigned int idx = 0; unsigned char checksum = 0; checksum += infopacket->hb0; checksum += infopacket->hb1; checksum += infopacket->hb2; checksum += infopacket->hb3; for (idx = 1; idx <= *payload_size; idx++) checksum += infopacket->sb[idx]; /* PB0 = Checksum (one byte complement) */ infopacket->sb[0] = (unsigned char)(0x100 - checksum); infopacket->valid = true; } static void build_vrr_infopacket_v1(enum signal_type signal, const struct mod_vrr_params *vrr, struct dc_info_packet *infopacket) { /* SPD info packet for FreeSync */ unsigned int payload_size = 0; build_vrr_infopacket_header_v1(signal, infopacket, &payload_size); build_vrr_infopacket_data_v1(vrr, infopacket); build_vrr_infopacket_checksum(&payload_size, infopacket); infopacket->valid = true; } static void build_vrr_infopacket_v2(enum signal_type signal, const struct mod_vrr_params *vrr, enum color_transfer_func app_tf, struct dc_info_packet *infopacket) { unsigned int payload_size = 0; build_vrr_infopacket_header_v2(signal, infopacket, &payload_size); build_vrr_infopacket_data_v1(vrr, infopacket); build_vrr_infopacket_fs2_data(app_tf, infopacket); build_vrr_infopacket_checksum(&payload_size, infopacket); infopacket->valid = true; } static void build_vrr_infopacket_v3(enum signal_type signal, const struct mod_vrr_params *vrr, enum color_transfer_func app_tf, struct dc_info_packet *infopacket) { unsigned int payload_size = 0; build_vrr_infopacket_header_v2(signal, infopacket, &payload_size); build_vrr_infopacket_data_v3(vrr, infopacket); build_vrr_infopacket_fs2_data(app_tf, infopacket); build_vrr_infopacket_checksum(&payload_size, infopacket); infopacket->valid = true; } void mod_freesync_build_vrr_infopacket(struct mod_freesync *mod_freesync, const struct dc_stream_state *stream, const struct mod_vrr_params *vrr, enum vrr_packet_type packet_type, enum color_transfer_func app_tf, struct dc_info_packet *infopacket) { /* SPD info packet for FreeSync * VTEM info packet for HdmiVRR * Check if Freesync is supported. Return if false. If true, * set the corresponding bit in the info packet */ if (!vrr->supported || (!vrr->send_info_frame)) return; switch (packet_type) { case PACKET_TYPE_FS_V3: build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket); break; case PACKET_TYPE_FS_V2: build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket); break; case PACKET_TYPE_VRR: case PACKET_TYPE_FS_V1: default: build_vrr_infopacket_v1(stream->signal, vrr, infopacket); } } void mod_freesync_build_vrr_params(struct mod_freesync *mod_freesync, const struct dc_stream_state *stream, struct mod_freesync_config *in_config, struct mod_vrr_params *in_out_vrr) { struct core_freesync *core_freesync = NULL; unsigned long long nominal_field_rate_in_uhz = 0; unsigned long long rounded_nominal_in_uhz = 0; unsigned int refresh_range = 0; unsigned long long min_refresh_in_uhz = 0; unsigned long long max_refresh_in_uhz = 0; if (mod_freesync == NULL) return; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); /* Calculate nominal field rate for stream */ nominal_field_rate_in_uhz = mod_freesync_calc_nominal_field_rate(stream); min_refresh_in_uhz = in_config->min_refresh_in_uhz; max_refresh_in_uhz = in_config->max_refresh_in_uhz; // Full range may be larger than current video timing, so cap at nominal if (max_refresh_in_uhz > nominal_field_rate_in_uhz) max_refresh_in_uhz = nominal_field_rate_in_uhz; // Full range may be larger than current video timing, so cap at nominal if (min_refresh_in_uhz > max_refresh_in_uhz) min_refresh_in_uhz = max_refresh_in_uhz; // If a monitor reports exactly max refresh of 2x of min, enforce it on nominal rounded_nominal_in_uhz = div_u64(nominal_field_rate_in_uhz + 50000, 100000) * 100000; if (in_config->max_refresh_in_uhz == (2 * in_config->min_refresh_in_uhz) && in_config->max_refresh_in_uhz == rounded_nominal_in_uhz) min_refresh_in_uhz = div_u64(nominal_field_rate_in_uhz, 2); if (!vrr_settings_require_update(core_freesync, in_config, (unsigned int)min_refresh_in_uhz, (unsigned int)max_refresh_in_uhz, in_out_vrr)) return; in_out_vrr->state = in_config->state; in_out_vrr->send_info_frame = in_config->vsif_supported; if (in_config->state == VRR_STATE_UNSUPPORTED) { in_out_vrr->state = VRR_STATE_UNSUPPORTED; in_out_vrr->supported = false; in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; return; } else { in_out_vrr->min_refresh_in_uhz = (unsigned int)min_refresh_in_uhz; in_out_vrr->max_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( (unsigned int)min_refresh_in_uhz); in_out_vrr->max_refresh_in_uhz = (unsigned int)max_refresh_in_uhz; in_out_vrr->min_duration_in_us = calc_duration_in_us_from_refresh_in_uhz( (unsigned int)max_refresh_in_uhz); if (in_config->state == VRR_STATE_ACTIVE_FIXED) in_out_vrr->fixed_refresh_in_uhz = in_config->fixed_refresh_in_uhz; else in_out_vrr->fixed_refresh_in_uhz = 0; refresh_range = in_out_vrr->max_refresh_in_uhz - in_out_vrr->min_refresh_in_uhz; in_out_vrr->supported = true; } in_out_vrr->fixed.ramping_active = in_config->ramping; in_out_vrr->btr.btr_enabled = in_config->btr; if (in_out_vrr->max_refresh_in_uhz < (2 * in_out_vrr->min_refresh_in_uhz)) in_out_vrr->btr.btr_enabled = false; else { in_out_vrr->btr.margin_in_us = in_out_vrr->max_duration_in_us - 2 * in_out_vrr->min_duration_in_us; if (in_out_vrr->btr.margin_in_us > BTR_MAX_MARGIN) in_out_vrr->btr.margin_in_us = BTR_MAX_MARGIN; } in_out_vrr->btr.btr_active = false; in_out_vrr->btr.inserted_duration_in_us = 0; in_out_vrr->btr.frames_to_insert = 0; in_out_vrr->btr.frame_counter = 0; in_out_vrr->fixed.fixed_active = false; in_out_vrr->fixed.target_refresh_in_uhz = 0; in_out_vrr->btr.mid_point_in_us = (in_out_vrr->min_duration_in_us + in_out_vrr->max_duration_in_us) / 2; if (in_out_vrr->state == VRR_STATE_UNSUPPORTED) { in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; } else if (in_out_vrr->state == VRR_STATE_DISABLED) { in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; } else if (in_out_vrr->state == VRR_STATE_INACTIVE) { in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; } else if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && refresh_range >= MIN_REFRESH_RANGE_IN_US) { in_out_vrr->adjust.v_total_min = calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); } else if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED) { in_out_vrr->fixed.target_refresh_in_uhz = in_out_vrr->fixed_refresh_in_uhz; if (in_out_vrr->fixed.ramping_active && in_out_vrr->fixed.fixed_active) { /* Do not update vtotals if ramping is already active * in order to continue ramp from current refresh. */ in_out_vrr->fixed.fixed_active = true; } else { in_out_vrr->fixed.fixed_active = true; in_out_vrr->adjust.v_total_min = calc_v_total_from_refresh(stream, in_out_vrr->fixed.target_refresh_in_uhz); in_out_vrr->adjust.v_total_max = in_out_vrr->adjust.v_total_min; } } else { in_out_vrr->state = VRR_STATE_INACTIVE; in_out_vrr->adjust.v_total_min = stream->timing.v_total; in_out_vrr->adjust.v_total_max = stream->timing.v_total; } } void mod_freesync_handle_preflip(struct mod_freesync *mod_freesync, const struct dc_plane_state *plane, const struct dc_stream_state *stream, unsigned int curr_time_stamp_in_us, struct mod_vrr_params *in_out_vrr) { struct core_freesync *core_freesync = NULL; unsigned int last_render_time_in_us = 0; unsigned int average_render_time_in_us = 0; if (mod_freesync == NULL) return; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); if (in_out_vrr->supported && in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) { unsigned int i = 0; unsigned int oldest_index = plane->time.index + 1; if (oldest_index >= DC_PLANE_UPDATE_TIMES_MAX) oldest_index = 0; last_render_time_in_us = curr_time_stamp_in_us - plane->time.prev_update_time_in_us; // Sum off all entries except oldest one for (i = 0; i < DC_PLANE_UPDATE_TIMES_MAX; i++) { average_render_time_in_us += plane->time.time_elapsed_in_us[i]; } average_render_time_in_us -= plane->time.time_elapsed_in_us[oldest_index]; // Add render time for current flip average_render_time_in_us += last_render_time_in_us; average_render_time_in_us /= DC_PLANE_UPDATE_TIMES_MAX; if (in_out_vrr->btr.btr_enabled) { apply_below_the_range(core_freesync, stream, last_render_time_in_us, in_out_vrr); } else { apply_fixed_refresh(core_freesync, stream, last_render_time_in_us, in_out_vrr); } } } void mod_freesync_handle_v_update(struct mod_freesync *mod_freesync, const struct dc_stream_state *stream, struct mod_vrr_params *in_out_vrr) { struct core_freesync *core_freesync = NULL; if ((mod_freesync == NULL) || (stream == NULL) || (in_out_vrr == NULL)) return; core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); if (in_out_vrr->supported == false) return; /* Below the Range Logic */ /* Only execute if in fullscreen mode */ if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && in_out_vrr->btr.btr_active) { /* TODO: pass in flag for Pre-DCE12 ASIC * in order for frame variable duration to take affect, * it needs to be done one VSYNC early, which is at * frameCounter == 1. * For DCE12 and newer updates to V_TOTAL_MIN/MAX * will take affect on current frame */ if (in_out_vrr->btr.frames_to_insert == in_out_vrr->btr.frame_counter) { in_out_vrr->adjust.v_total_min = calc_v_total_from_duration(stream, in_out_vrr, in_out_vrr->btr.inserted_duration_in_us); in_out_vrr->adjust.v_total_max = in_out_vrr->adjust.v_total_min; } if (in_out_vrr->btr.frame_counter > 0) in_out_vrr->btr.frame_counter--; /* Restore FreeSync */ if (in_out_vrr->btr.frame_counter == 0) { in_out_vrr->adjust.v_total_min = calc_v_total_from_refresh(stream, in_out_vrr->max_refresh_in_uhz); in_out_vrr->adjust.v_total_max = calc_v_total_from_refresh(stream, in_out_vrr->min_refresh_in_uhz); } } /* If in fullscreen freesync mode or in video, do not program * static screen ramp values */ if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE) in_out_vrr->fixed.ramping_active = false; /* Gradual Static Screen Ramping Logic */ /* Execute if ramp is active and user enabled freesync static screen*/ if (in_out_vrr->state == VRR_STATE_ACTIVE_FIXED && in_out_vrr->fixed.ramping_active) { update_v_total_for_static_ramp( core_freesync, stream, in_out_vrr); } } void mod_freesync_get_settings(struct mod_freesync *mod_freesync, const struct mod_vrr_params *vrr, unsigned int *v_total_min, unsigned int *v_total_max, unsigned int *event_triggers, unsigned int *window_min, unsigned int *window_max, unsigned int *lfc_mid_point_in_us, unsigned int *inserted_frames, unsigned int *inserted_duration_in_us) { if (mod_freesync == NULL) return; if (vrr->supported) { *v_total_min = vrr->adjust.v_total_min; *v_total_max = vrr->adjust.v_total_max; *event_triggers = 0; *lfc_mid_point_in_us = vrr->btr.mid_point_in_us; *inserted_frames = vrr->btr.frames_to_insert; *inserted_duration_in_us = vrr->btr.inserted_duration_in_us; } } unsigned long long mod_freesync_calc_nominal_field_rate( const struct dc_stream_state *stream) { unsigned long long nominal_field_rate_in_uhz = 0; unsigned int total = stream->timing.h_total * stream->timing.v_total; /* Calculate nominal field rate for stream, rounded up to nearest integer */ nominal_field_rate_in_uhz = stream->timing.pix_clk_100hz; nominal_field_rate_in_uhz *= 100000000ULL; nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz, total); return nominal_field_rate_in_uhz; } bool mod_freesync_is_valid_range(struct mod_freesync *mod_freesync, const struct dc_stream_state *stream, uint32_t min_refresh_cap_in_uhz, uint32_t max_refresh_cap_in_uhz, uint32_t min_refresh_request_in_uhz, uint32_t max_refresh_request_in_uhz) { /* Calculate nominal field rate for stream */ unsigned long long nominal_field_rate_in_uhz = mod_freesync_calc_nominal_field_rate(stream); /* Typically nominal refresh calculated can have some fractional part. * Allow for some rounding error of actual video timing by taking floor * of caps and request. Round the nominal refresh rate. * * Dividing will convert everything to units in Hz although input * variable name is in uHz! * * Also note, this takes care of rounding error on the nominal refresh * so by rounding error we only expect it to be off by a small amount, * such as < 0.1 Hz. i.e. 143.9xxx or 144.1xxx. * * Example 1. Caps Min = 40 Hz, Max = 144 Hz * Request Min = 40 Hz, Max = 144 Hz * Nominal = 143.5x Hz rounded to 144 Hz * This function should allow this as valid request * * Example 2. Caps Min = 40 Hz, Max = 144 Hz * Request Min = 40 Hz, Max = 144 Hz * Nominal = 144.4x Hz rounded to 144 Hz * This function should allow this as valid request * * Example 3. Caps Min = 40 Hz, Max = 144 Hz * Request Min = 40 Hz, Max = 144 Hz * Nominal = 120.xx Hz rounded to 120 Hz * This function should return NOT valid since the requested * max is greater than current timing's nominal * * Example 4. Caps Min = 40 Hz, Max = 120 Hz * Request Min = 40 Hz, Max = 120 Hz * Nominal = 144.xx Hz rounded to 144 Hz * This function should return NOT valid since the nominal * is greater than the capability's max refresh */ nominal_field_rate_in_uhz = div_u64(nominal_field_rate_in_uhz + 500000, 1000000); min_refresh_cap_in_uhz /= 1000000; max_refresh_cap_in_uhz /= 1000000; min_refresh_request_in_uhz /= 1000000; max_refresh_request_in_uhz /= 1000000; // Check nominal is within range if (nominal_field_rate_in_uhz > max_refresh_cap_in_uhz || nominal_field_rate_in_uhz < min_refresh_cap_in_uhz) return false; // If nominal is less than max, limit the max allowed refresh rate if (nominal_field_rate_in_uhz < max_refresh_cap_in_uhz) max_refresh_cap_in_uhz = nominal_field_rate_in_uhz; // Don't allow min > max if (min_refresh_request_in_uhz > max_refresh_request_in_uhz) return false; // Check min is within range if (min_refresh_request_in_uhz > max_refresh_cap_in_uhz || min_refresh_request_in_uhz < min_refresh_cap_in_uhz) return false; // Check max is within range if (max_refresh_request_in_uhz > max_refresh_cap_in_uhz || max_refresh_request_in_uhz < min_refresh_cap_in_uhz) return false; // For variable range, check for at least 10 Hz range if ((max_refresh_request_in_uhz != min_refresh_request_in_uhz) && (max_refresh_request_in_uhz - min_refresh_request_in_uhz < 10)) return false; return true; }