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drm/i915: Fix CRT hotplug detect by checking really no channels attached

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For CRT hotplug detect status, we have four test results as blue
channel only, green channel only, both blue and green channel, and
no channel attached. Origin code only marks both blue and green channel
case as connected, but ignore other possible connected states. This one
trys to detect CRT by checking no channel attached case instead.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2009-11-11 02:30:50 +00:00 committed by Eric Anholt
parent 9cf1e35cb0
commit 8e9e0eea99
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_crt.c
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@ -262,8 +262,8 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector)
} while (time_after(timeout, jiffies));
}
if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
CRT_HOTPLUG_MONITOR_COLOR)
if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
CRT_HOTPLUG_MONITOR_NONE)
return true;
return false;