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path: root/drivers/gpu/drm/i915/intel_crt.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_crt.c')
-rw-r--r--drivers/gpu/drm/i915/intel_crt.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index e16ac5a28c3..22ff3845573 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -217,7 +217,8 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- u32 hotplug_en;
+ u32 hotplug_en, orig, stat;
+ bool ret = false;
int i, tries = 0;
if (HAS_PCH_SPLIT(dev))
@@ -232,8 +233,8 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector)
tries = 2;
else
tries = 1;
- hotplug_en = I915_READ(PORT_HOTPLUG_EN);
- hotplug_en &= CRT_FORCE_HOTPLUG_MASK;
+ hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
+ hotplug_en &= CRT_HOTPLUG_MASK;
hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
if (IS_G4X(dev))
@@ -255,11 +256,17 @@ 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_NONE)
- return true;
+ stat = I915_READ(PORT_HOTPLUG_STAT);
+ if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
+ ret = true;
+
+ /* clear the interrupt we just generated, if any */
+ I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
- return false;
+ /* and put the bits back */
+ I915_WRITE(PORT_HOTPLUG_EN, orig);
+
+ return ret;
}
static bool intel_crt_detect_ddc(struct drm_encoder *encoder)
@@ -569,7 +576,7 @@ void intel_crt_init(struct drm_device *dev)
(1 << INTEL_ANALOG_CLONE_BIT) |
(1 << INTEL_SDVO_LVDS_CLONE_BIT);
intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
- connector->interlace_allowed = 0;
+ connector->interlace_allowed = 1;
connector->doublescan_allowed = 0;
drm_encoder_helper_add(&intel_encoder->enc, &intel_crt_helper_funcs);