From 85fc95ba85fe4f51691e0c032954d49e73becd47 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Wed, 27 Mar 2013 15:47:11 +0100
Subject: [PATCH] drm/i915: clear crt hotplug compare voltage field before
 setting
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Noticed while reviewing the hotplug irq setup code. Just looks better.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 drivers/gpu/drm/i915/i915_irq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 666a0ecebb12..15a97ea2d6ea 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2775,6 +2775,7 @@ static void i915_hpd_irq_setup(struct drm_device *dev)
 		*/
 		if (IS_G4X(dev))
 			hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
+		hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
 		hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
 
 		/* Ignore TV since it's buggy */
-- 
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