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drm/i915: Apply the force-detect VGA w/a to Valleyview 

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@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67733
Tested-by: kobeqin <kobe.qin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Check for gen >= 5 insted, acked by Chris.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2013-08-26 19:51:06 -03:00 committed by Daniel Vetter
parent 97e4eed7dc
commit 10603caacf
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_crt.c
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@ -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 (INTEL_INFO(dev)->gen >= 5) {
u32 adpa;
adpa = I915_READ(crt->adpa_reg);