Patch "drm/radeon/ci: disable mclk switching for high refresh rates (v2)" has been added to the 4.4-stable tree

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

drm/radeon/ci: disable mclk switching for high refresh rates (v2)

to the 4.4-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-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch
and it can be found in the queue-4.4 subdirectory.

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

From: Alex Deucher <[email protected]>
Date: Thu, 11 May 2017 13:14:14 -0400
Subject: drm/radeon/ci: disable mclk switching for high refresh rates (v2)
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From: Alex Deucher <[email protected]>

commit ab03d9fe508f4e2914a8f4a9eef1b21051cacd0f upstream.

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

v2: fix logic inversion (Nils)

---
 drivers/gpu/drm/radeon/ci_dpm.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -782,6 +782,12 @@ bool ci_dpm_vblank_too_short(struct rade
 	if (r600_dpm_get_vrefresh(rdev) > 120)
 		return true;
 
+	/* disable mclk switching if the refresh is >120Hz, even if the
+        * blanking period would allow it
+        */
+	if (r600_dpm_get_vrefresh(rdev) > 120)
+		return true;
+
 	if (vblank_time < switch_limit)
 		return true;
 	else

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

queue-4.4/drm-amd-amdgpu-return-error-if-initiating-read-out-of-range-on-vram.patch queue-4.4/drm-radeon-fix-edp-for-single-display-imac10-1-v2.patch queue-4.4/drm-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch