drm/amd/display: Fix and simplify apply_below_the_range()

The comparison of inserted_frame_duration_in_us against a
duration calculated from max_refresh_in_uhz is both wrong
in its math and not needed, as the min_duration_in_us value
is already cached in in_out_vrr for reuse. No need to
recalculate it wrongly at each invocation.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 3d867e3..19b1eae 100644 (file)
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -437,10 +437,8 @@ static void apply_below_the_range(struct core_freesync *core_freesync,
                        inserted_frame_duration_in_us = last_render_time_in_us /
                                                        frames_to_insert;
 
-               if (inserted_frame_duration_in_us <
-                       (1000000 / in_out_vrr->max_refresh_in_uhz))
-                       inserted_frame_duration_in_us =
-                               (1000000 / in_out_vrr->max_refresh_in_uhz);
+               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 =