Patch "drm/i915: Fix init_clock_gating for resume" has been added to the 4.14-stable tree

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

drm/i915: Fix init_clock_gating for resume

to the 4.14-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-i915-fix-init_clock_gating-for-resume.patch
and it can be found in the queue-4.14 subdirectory.

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

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[email protected]>
Date: Thu, 16 Nov 2017 18:02:15 +0200
Subject: drm/i915: Fix init_clock_gating for resume
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From: Ville Syrjälä <[email protected]>

commit 3572f04c69ed4369da5d3c65d84fb18774aa60b6 upstream.

Moving the init_clock_gating() call from intel_modeset_init_hw() to intel_modeset_gem_init() had an unintended effect of not applying some workarounds on resume. This, for example, cause some kind of corruption to appear at the top of my IVB Thinkpad X1 Carbon LVDS screen after hibernation. Fix the problem by explicitly calling init_clock_gating() from the resume path.

I really hope this doesn't break something else again. At least the problems reported at https://bugs.freedesktop.org/show_bug.cgi?id=103549
didn't make a comeback, even after a hibernate cycle.

v2: Reorder the init_clock_gating vs. modeset_init_hw to match
the display reset path (Rodrigo)

---
 drivers/gpu/drm/i915/i915_drv.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1693,6 +1693,7 @@ static int i915_drm_resume(struct drm_de
 	intel_guc_resume(dev_priv);
 
 	intel_modeset_init_hw(dev);
+	intel_init_clock_gating(dev_priv);
 
 	spin_lock_irq(&dev_priv->irq_lock);
 	if (dev_priv->display.hpd_irq_setup)

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

queue-4.14/drm-i915-move-init_clock_gating-back-to-where-it-was.patch queue-4.14/drm-i915-fix-init_clock_gating-for-resume.patch