Patch "drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)" has been added to the 4.9-stable tree

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

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

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-amdgpu-ci-disable-mclk-switching-for-high-refresh-rates-v2.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.

From: Alex Deucher <[email protected]>
Date: Thu, 11 May 2017 13:10:02 -0400
Subject: drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
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From: Alex Deucher <[email protected]>

commit 0a646f331db0eb9efc8d3a95a44872036d441d58 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/amd/amdgpu/ci_dpm.c |    6 ++++++
 1 file changed, 6 insertions(+)

@@ -900,6 +900,12 @@ static bool ci_dpm_vblank_too_short(stru
 	u32 vblank_time = amdgpu_dpm_get_vblank_time(adev);
 	u32 switch_limit = adev->mc.vram_type == AMDGPU_VRAM_TYPE_GDDR5 ? 450 : 300;
 
+	/* disable mclk switching if the refresh is >120Hz, even if the
+	 * blanking period would allow it
+	 */
+	if (amdgpu_dpm_get_vrefresh(adev) > 120)
+		return true;
+
 	if (vblank_time < switch_limit)
 		return true;
 	else

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

queue-4.9/drm-amdgpu-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch