diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/freesync/freesync.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 1435 |
1 files changed, 1435 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 000000000..9e74b6e8b --- /dev/null +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -0,0 +1,1435 @@ +/* + * 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" + +#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), 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)) { + 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); + } 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 { + /* Reset the flip interval counter if we condition is no longer met */ + in_vrr->flip_interval.flip_interval_detect_counter = 0; + } + } + + in_vrr->flip_interval.vsyncs_between_flip = 0; +} + +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, + bool freesync_on_desktop) +{ + /* 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; + + if (freesync_on_desktop) { + /* PB6 = [Bit 2 = FreeSync Active] */ + if (vrr->state != VRR_STATE_DISABLED && + vrr->state != VRR_STATE_UNSUPPORTED) + infopacket->sb[6] |= 0x04; + } else { + 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); +} + +static void build_vrr_infopacket_data_v3(const struct mod_vrr_params *vrr, + struct dc_info_packet *infopacket) +{ + unsigned int min_refresh; + unsigned int max_refresh; + unsigned int fixed_refresh; + unsigned int min_programmed; + unsigned int max_programmed; + + /* 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; + + min_refresh = (vrr->min_refresh_in_uhz + 500000) / 1000000; + max_refresh = (vrr->max_refresh_in_uhz + 500000) / 1000000; + fixed_refresh = (vrr->fixed_refresh_in_uhz + 500000) / 1000000; + + min_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : + (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? min_refresh : + (vrr->state == VRR_STATE_INACTIVE) ? min_refresh : + max_refresh; // Non-fs case, program nominal range + + max_programmed = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? fixed_refresh : + (vrr->state == VRR_STATE_ACTIVE_VARIABLE) ? max_refresh : + max_refresh;// Non-fs case, program nominal range + + /* PB7 = FreeSync Minimum refresh rate (Hz) */ + infopacket->sb[7] = min_programmed & 0xFF; + + /* PB8 = FreeSync Maximum refresh rate (Hz) */ + infopacket->sb[8] = max_programmed & 0xFF; + + /* PB11 : MSB FreeSync Minimum refresh rate [Hz] - bits 9:8 */ + infopacket->sb[11] = (min_programmed >> 8) & 0x03; + + /* PB12 : MSB FreeSync Maximum refresh rate [Hz] - bits 9:8 */ + infopacket->sb[12] = (max_programmed >> 8) & 0x03; + + /* PB16 : Reserved bits 7:1, FixedRate bit 0 */ + infopacket->sb[16] = (vrr->state == VRR_STATE_ACTIVE_FIXED) ? 1 : 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 = 0x09; + } 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_header_v3(enum signal_type signal, + struct dc_info_packet *infopacket, + unsigned int *payload_size) +{ + unsigned char version; + + version = 3; + if (dc_is_hdmi_signal(signal)) { + + /* HEADER */ + + /* HB0 = Packet Type = 0x83 (Source Product + * Descriptor InfoFrame) + */ + infopacket->hb0 = DC_HDMI_INFOFRAME_TYPE_SPD; + + /* HB1 = Version = 0x03 */ + infopacket->hb1 = version; + + /* HB2 = [Bits 7:5 = 0] [Bits 4:0 = Length] */ + infopacket->hb2 = 0x10; + + *payload_size = 0x10; + } 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 = (version & 0x3F) << 2; + + *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, + bool freesync_on_desktop) +{ + /* 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, freesync_on_desktop); + 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, + bool freesync_on_desktop) +{ + unsigned int payload_size = 0; + + build_vrr_infopacket_header_v2(signal, infopacket, &payload_size); + build_vrr_infopacket_data_v1(vrr, infopacket, freesync_on_desktop); + + build_vrr_infopacket_fs2_data(app_tf, infopacket); + + build_vrr_infopacket_checksum(&payload_size, infopacket); + + infopacket->valid = true; +} +#ifndef TRIM_FSFT +static void build_vrr_infopacket_fast_transport_data( + bool ftActive, + unsigned int ftOutputRate, + struct dc_info_packet *infopacket) +{ + /* PB9 : bit7 - fast transport Active*/ + unsigned char activeBit = (ftActive) ? 1 << 7 : 0; + + infopacket->sb[1] &= ~activeBit; //clear bit + infopacket->sb[1] |= activeBit; //set bit + + /* PB13 : Target Output Pixel Rate [kHz] - bits 7:0 */ + infopacket->sb[13] = ftOutputRate & 0xFF; + + /* PB14 : Target Output Pixel Rate [kHz] - bits 15:8 */ + infopacket->sb[14] = (ftOutputRate >> 8) & 0xFF; + + /* PB15 : Target Output Pixel Rate [kHz] - bits 23:16 */ + infopacket->sb[15] = (ftOutputRate >> 16) & 0xFF; + +} +#endif + +static void build_vrr_infopacket_v3(enum signal_type signal, + const struct mod_vrr_params *vrr, +#ifndef TRIM_FSFT + bool ftActive, unsigned int ftOutputRate, +#endif + enum color_transfer_func app_tf, + struct dc_info_packet *infopacket) +{ + unsigned int payload_size = 0; + + build_vrr_infopacket_header_v3(signal, infopacket, &payload_size); + build_vrr_infopacket_data_v3(vrr, infopacket); + + build_vrr_infopacket_fs2_data(app_tf, infopacket); + +#ifndef TRIM_FSFT + build_vrr_infopacket_fast_transport_data( + ftActive, + ftOutputRate, + infopacket); +#endif + + build_vrr_infopacket_checksum(&payload_size, infopacket); + + infopacket->valid = true; +} + +static void build_vrr_infopacket_sdp_v1_3(enum vrr_packet_type packet_type, + struct dc_info_packet *infopacket) +{ + uint8_t idx = 0, size = 0; + + size = ((packet_type == PACKET_TYPE_FS_V1) ? 0x08 : + (packet_type == PACKET_TYPE_FS_V3) ? 0x10 : + 0x09); + + for (idx = infopacket->hb2; idx > 1; idx--) // Data Byte Count: 0x1B + infopacket->sb[idx] = infopacket->sb[idx-1]; + + infopacket->sb[1] = size; // Length + infopacket->sb[0] = (infopacket->hb3 >> 2) & 0x3F;//Version + infopacket->hb3 = (0x13 << 2); // Header,SDP 1.3 + infopacket->hb2 = 0x1D; +} + +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, + bool pack_sdp_v1_3) +{ + /* 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->send_info_frame) + return; + + switch (packet_type) { + case PACKET_TYPE_FS_V3: +#ifndef TRIM_FSFT + // always populate with pixel rate. + build_vrr_infopacket_v3( + stream->signal, vrr, + stream->timing.flags.FAST_TRANSPORT, + (stream->timing.flags.FAST_TRANSPORT) ? + stream->timing.fast_transport_output_rate_100hz : + stream->timing.pix_clk_100hz, + app_tf, infopacket); +#else + build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket); +#endif + break; + case PACKET_TYPE_FS_V2: + build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop); + break; + case PACKET_TYPE_VRR: + case PACKET_TYPE_FS_V1: + default: + build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop); + } + + if (true == pack_sdp_v1_3 && + true == dc_is_dp_signal(stream->signal) && + packet_type != PACKET_TYPE_VRR && + packet_type != PACKET_TYPE_VTEM) + build_vrr_infopacket_sdp_v1_3(packet_type, 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 = div_u64(in_out_vrr->max_refresh_in_uhz + 500000, 1000000) - ++ div_u64(in_out_vrr->min_refresh_in_uhz + 500000, 1000000); + + 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_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); + } 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 = + mod_freesync_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); + } + + determine_flip_interval_workaround_req(in_out_vrr, + curr_time_stamp_in_us); + + } +} + +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; + unsigned int cur_timestamp_in_us; + unsigned long long cur_tick; + + 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; + + cur_tick = dm_get_timestamp(core_freesync->dc->ctx); + cur_timestamp_in_us = (unsigned int) + div_u64(dm_get_elapse_time_in_ns(core_freesync->dc->ctx, cur_tick, 0), 1000); + + in_out_vrr->flip_interval.vsyncs_between_flip++; + in_out_vrr->flip_interval.v_update_timestamp_in_us = cur_timestamp_in_us; + + if (in_out_vrr->state == VRR_STATE_ACTIVE_VARIABLE && + (in_out_vrr->flip_interval.flip_interval_workaround_active || + (!in_out_vrr->flip_interval.flip_interval_workaround_active && + in_out_vrr->flip_interval.program_flip_interval_workaround))) { + // set freesync vmin vmax to nominal for workaround + 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; + in_out_vrr->flip_interval.program_flip_interval_workaround = false; + in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = true; + return; + } + + if (in_out_vrr->state != VRR_STATE_ACTIVE_VARIABLE && + in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup) { + in_out_vrr->flip_interval.do_flip_interval_workaround_cleanup = false; + in_out_vrr->flip_interval.flip_interval_detect_counter = 0; + in_out_vrr->flip_interval.vsyncs_between_flip = 0; + in_out_vrr->flip_interval.vsync_to_flip_in_us = 0; + } + + /* 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 = + 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); + } + } + + /* 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; +} + +unsigned long long mod_freesync_calc_field_rate_from_timing( + unsigned int vtotal, unsigned int htotal, unsigned int pix_clk) +{ + unsigned long long field_rate_in_uhz = 0; + unsigned int total = htotal * vtotal; + + /* Calculate nominal field rate for stream, rounded up to nearest integer */ + field_rate_in_uhz = pix_clk; + field_rate_in_uhz *= 1000000ULL; + + field_rate_in_uhz = div_u64(field_rate_in_uhz, total); + + return field_rate_in_uhz; +} + +bool mod_freesync_get_freesync_enabled(struct mod_vrr_params *pVrr) +{ + return (pVrr->state != VRR_STATE_UNSUPPORTED) && (pVrr->state != VRR_STATE_DISABLED); +} + +bool mod_freesync_is_valid_range(uint32_t min_refresh_cap_in_uhz, + uint32_t max_refresh_cap_in_uhz, + uint32_t nominal_field_rate_in_uhz) +{ + + /* 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; + + /* 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; + + /* Check min is within range */ + if (min_refresh_cap_in_uhz > max_refresh_cap_in_uhz) + return false; + + /* For variable range, check for at least 10 Hz range */ + if (nominal_field_rate_in_uhz - min_refresh_cap_in_uhz < 10) + return false; + + return true; +} |