[Intel-gfx] [PATCH] drm/i915: Apply the force-detect VGA w/a to Valleyview

[Chris Wilson]

It appears that Valleyview shares its VGA encoder with more recent
siblings and requires the same forced detection cycle after a hardware
reset before we can rely on hotplugging.

Reported-and-tested-by: kobeqin <kobe.qin at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67733
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_crt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index b5a3875..7475200 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -688,7 +688,7 @@ static void intel_crt_reset(struct drm_connector *connector)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crt *crt = intel_attached_crt(connector);
 
-	if (HAS_PCH_SPLIT(dev)) {
+	if (HAS_PCH_SPLIT(dev) || IS_VALLEYVIEW(dev)) {
 		u32 adpa;
 
 		adpa = I915_READ(crt->adpa_reg);
-- 
1.7.9.5