[Intel-gfx] [PATCH] drm/i915: Make sure PORT_HOTPLUG_EN is written

[Egbert Eich]

Add posting read to make sure PORT_HOTPLUG_EN is written in
i915_hpd_irq_setup().

Signed-off-by: Egbert Eich <eich at suse.de>
---
 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 1f3a971..a38372b 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2805,6 +2805,7 @@ static void i915_hpd_irq_setup(struct drm_device *dev)
 
 		/* Ignore TV since it's buggy */
 		I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
+		POSTING_READ(PORT_HOTPLUG_EN);
 	}
 }
 
-- 
1.8.1.4