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drm/amd/display: FreeSync not active near lower bound of non-LFC monitor range

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[Why]
On narrow range monitors without LFC, a margin prevents good utilization
of the available range.

[How]
Decrease the margin for exiting fixed mode and fix the frame counter to
reset if a non-consecutive render is found.

Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aric Cyr 2020-09-22 21:37:06 -04:00 committed by Alex Deucher
parent 9b42868c3f
commit 5dff371a73
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/amd/display/modules/freesync/freesync.c
View File

@ -42,10 +42,10 @@
/* 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
#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 5
#define FIXED_REFRESH_EXIT_FRAME_COUNT 10
struct core_freesync {
struct mod_freesync public;
@ -420,7 +420,8 @@ static void apply_fixed_refresh(struct core_freesync *core_freesync,
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) {
@ -434,7 +435,8 @@ static void apply_fixed_refresh(struct core_freesync *core_freesync,
in_out_vrr->max_refresh_in_uhz;
update = true;
}
}
} else
in_out_vrr->fixed.frame_counter = 0;
}
if (update) {