drm/i915/crt: Make sure the hotplug interrupt is enabled
After disabling the hotplug interrupts for VGA detection on Ironlake, be
sure to re-enable them again afterwards.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30378
Signed-off-by: Yuanhan Liu <yuanhan.liu@intel.com>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 389fcd2..c55c770 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -191,7 +191,8 @@
DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
if (turn_off_dac) {
- I915_WRITE(PCH_ADPA, temp);
+ /* Make sure hotplug is enabled */
+ I915_WRITE(PCH_ADPA, temp | ADPA_CRT_HOTPLUG_ENABLE);
(void)I915_READ(PCH_ADPA);
}
