drm/amd/pm: no need to force MCLK to highest when no display connected

Correct the check for vblank short.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
index 22b6a8e..d0ec838 100644 (file)
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
@@ -3330,7 +3330,8 @@ static int smu7_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,
 
        disable_mclk_switching_for_display = ((1 < hwmgr->display_config->num_display) &&
                                                !hwmgr->display_config->multi_monitor_in_sync) ||
-                                               smu7_vblank_too_short(hwmgr, hwmgr->display_config->min_vblank_time);
+                                               (hwmgr->display_config->num_display &&
+                                               smu7_vblank_too_short(hwmgr, hwmgr->display_config->min_vblank_time));
 
        disable_mclk_switching = disable_mclk_switching_for_frame_lock ||
                                         disable_mclk_switching_for_display;