Even if the vblank period would allow it, it still seems to
be problematic on some cards.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868

Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c 
b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index d745065..98a1463 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -2793,7 +2793,8 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr 
*hwmgr,
 
        disable_mclk_switching = ((1 < info.display_count) ||
                                  disable_mclk_switching_for_frame_lock ||
-                                 smu7_vblank_too_short(hwmgr, 
mode_info.vblank_time_us));
+                                 smu7_vblank_too_short(hwmgr, 
mode_info.vblank_time_us) ||
+                                 (mode_info.refresh_rate > 120));
 
        sclk = smu7_ps->performance_levels[0].engine_clock;
        mclk = smu7_ps->performance_levels[0].memory_clock;
-- 
2.5.5

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