FAILED: patch "[PATCH] drm/amd/powerplay/smu7: disable mclk switching for high" failed to apply to 4.12-stable tree

The patch below does not apply to the 4.12-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Alex Deucher <[email protected]>
Date: Thu, 11 May 2017 13:57:41 -0400
Subject: [PATCH] drm/amd/powerplay/smu7: disable mclk switching for high
refresh rates
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Even if the vblank period would allow it, it still seems to be problematic on some cards.

index 1445c51b6d05..102eb6d029fa 100644
@@ -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;