Patch "drm/amd/powerplay/smu7: disable mclk switching for high refresh rates" has been added to the 4.9-stable tree

From 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 Mon Sep 17 00:00:00 2001

This is a note to let you know that I've just added the patch titled

drm/amd/powerplay/smu7: disable mclk switching for high refresh rates

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-amd-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 Mon Sep 17 00:00:00 2001

From: Alex Deucher <[email protected]>
Date: Thu, 11 May 2017 13:57:41 -0400
Subject: drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
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From: Alex Deucher <[email protected]>

commit 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 upstream.

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

Acked-by Christian K�nig <[email protected]>

Signed-off-by Alex Deucher <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c +2 -1

@@ -2633,7 +2633,8 @@ static int smu7_apply_state_adjust_rules
 
 	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;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/drm-amd-powerplay-smu7-add-vblank-check-for-mclk-switching-v2.patch queue-4.9/drm-radeon-fix-vram_size-visible-values-in-drm_radeon_gem_info-ioctl.patch queue-4.9/drm-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch queue-4.9/drm-radeon-unbreak-hpd-handling-for-r600.patch queue-4.9/drm-amd-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch